Commodity, wound body, and storage box

Abstract

To provide a commodity, wound body, and storage box that suppress the occurrence of top and bottom wrinkles when applied while achieving both excellent pressing and fixation properties.SOLUTION: A commodity includes a substrate and an adhesive portion arranged on the surface of the substrate. The surface has a first region, a second region, and a third region in this order. Each of the first region, the second region, and the third region has a covered portion where the substrate is covered with the adhesive portion and an exposed portion where the substrate is not covered with the adhesive portion. The adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region and the third region.SELECTED DRAWING: Figure 3B

Description

[Technical field]

[0001] The present invention relates to an article, a roll, and a storage box. [Background technology]

[0002] Special keyboard covers have been proposed to protect computer keyboards from water, dust, etc. and prevent breakdowns. For example, Patent Document 1 proposes a stain-preventing film having a base film and an adhesive layer partially disposed on the base film, and reports that by attaching such a stain-preventing film to a keyboard or the like, it is possible to prevent staining while avoiding a decrease in operability (hereinafter, simply referred to as "input unit") of an input unit having push buttons (hereinafter, simply referred to as "input unit"). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7138501 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the study by the present inventor, it has been found that, in the technology described in Patent Document 1, on the premise that the coating pattern of the adhesive layer (adhesive) partially arranged on the base film is uniform, if the coating amount of the adhesive is increased to improve the fixation of the stain prevention film to the keyboard, the pressability tends to deteriorate. Here, it has also been found that, in the technology described in Patent Document 1, if the coating amount of the adhesive is reduced to improve the pressability, the film tends to peel off easily. Therefore, in the technology described in Patent Document 1, it is also possible to arrange the adhesive layer (adhesive) non-uniformly. For example, when the base film is divided into three regions (three band-shaped regions) of one end, the center, and the other end, it is considered that the density of the adhesive layer arranged in the center region (typically, one band-shaped region corresponding to the input part of the keyboard) is made smaller than that of the other regions (typically, two band-shaped regions corresponding to the parts other than the input part of the keyboard), thereby ensuring the pressing property and preventing a decrease in the fixation of the film. However, as shown in Figures 7, 8, and 10 of Patent Document 1, when the adhesive layer is arranged over the entire surface of the regions of one end and the other end (typically, the regions corresponding to the parts other than the input part of the keyboard) in order to increase the fixation, air is likely to accumulate in the regions of one end and the other end when the film is attached, and as a result, wrinkles (hereinafter, wrinkles that may occur in the regions of one end and the other end of the film may be abbreviated as "upper and lower wrinkles") tend to occur.

[0005] The present invention has been made in consideration of the above problems, and aims to provide an article etc. that can suppress the occurrence of wrinkles above and below when applied while achieving both excellent pressing ability and fixation ability. [Means for solving the problem]

[0006] As a result of extensive research, the present inventors have found that the above-mentioned problems can be solved by an article having a specific structure, and have thus completed the present invention.

[0007] That is, the present invention includes the following aspects. [1] An article comprising a substrate and an adhesive portion disposed on a surface of the substrate, the surface having a first region, a second region, and a third region in this order; each of the first region, the second region, and the third region has a covered portion in which the base material is covered with the adhesive portion, and an exposed portion in which the base material is not covered with the adhesive portion; An article, wherein the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region and the third region. [2] In each of the first region, the second region, and the third region, the adhesive portion includes a dot-like adhesive portion, Each of the first region, the second region, and the third region has an area of ​​3×10 -4 cm 2 More than 0.8cm 2 the total area of ​​the dot-like adhesive portion group composed of the dot-like adhesive portions that are the following is 50% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region, The article according to [1], wherein the coverage area ratios of the first region, the second region, and the third region, calculated by the following method, are each 0.1% or more and 90% or less: (Method of measuring coverage area ratio) A measurement area of ​​1 cm square containing at least one independent adhesive dot is set for the adhesive dot group, and the total area of ​​the adhesive dots within the measurement area of ​​1 cm square is maximized. The total area of ​​the adhesive dots in the measurement area / 1 cm 2 Calculate the coverage area rate by multiplying by 100. [3] The article described in [2], wherein the coverage area ratio of the second region is 100% or less of each of the coverage area ratios of the first region and the third region. [4] The coverage area ratio of the second region is 0.1% or more and 75% or less, The article described in [2] or [3], wherein the coverage area ratio of each of the first region and the third region is 5% or more and 90% or less. [5] The article according to any one of [1] to [4], further comprising a release layer covering the back surface of the substrate. [6] The article according to any one of [1] to [5], which is used to cover the surface of an input section of a device. [7] A core tube and The article according to any one of [1] to [6] wound around the core tube; A wound body comprising: [8] A rolled body obtained by continuously forming and rolling up the article according to any one of [1] to [6]. [9] A main body having a front panel, a bottom panel, a rear panel, and side panels and an opening at the top surface; The wound body according to [7], which is housed in the main body; A lid portion arranged to be able to open and close the opening on the top surface; Equipped with The lid portion is A top plate connected to an upper edge of the back plate; A cover piece connected to a front edge portion of the top plate; A storage box having

[10] The storage box described in [9], further comprising a cutting section that cuts the item pulled out from the roll.

[11] An article comprising a substrate and an adhesive portion disposed on a surface of the substrate, The surface has a first region and a second region surrounded by the first region, the first region and the second region each have a covered portion where the base material is covered with the adhesive portion and an exposed portion where the base material is not covered with the adhesive portion, An article, wherein the adhesive strength of the adhesive portion in the second region is less than the adhesive strength of the adhesive portion in the first region. Effect of the Invention

[0008] According to the present invention, it is possible to provide an article or the like that can suppress the occurrence of wrinkles at the top and bottom when applied while achieving both excellent pressing properties and fixation properties. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing a typical example of a pantograph-type key used in a notebook computer. [Diagram 2] FIG. 2 is a graph showing the relationship between stroke increase and load. [Diagram 3] 3(A) and (B) are explanatory diagrams showing a state of use in the case where the article of this embodiment is applied as a cover film for a notebook computer. [Figure 4]4(A) to (D) are diagrams showing typical examples of pattern arrangements of adhesive portions in the article of this embodiment. [Diagram 5] FIG. 5 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 6] FIG. 6 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 7] FIG. 7 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 8] FIG. 8 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 9] FIG. 9 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 10] FIG. 10 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 11] FIG. 11 is a diagram showing a typical example of a pattern arrangement of the adhesive portion in the article of this embodiment. [Figure 12] FIG. 12 is a diagram showing a typical example of the arrangement of the regions in the article of this embodiment. [Figure 13] FIG. 13 is a diagram showing a pattern arrangement of the adhesive portion in Example 1. As shown in FIG. [Figure 14] FIG. 14 is a diagram showing the pattern arrangement of the adhesive portion in Example 6. As shown in FIG. [Figure 15] FIG. 15 is a diagram showing the pattern arrangement of the adhesive portion in Example 9. As shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment for carrying out the present invention (hereinafter, referred to as "the present embodiment") will be described in detail. The following embodiment is an example for explaining the present invention, and is not intended to limit the present invention to only this embodiment. In other words, the present invention can be carried out by appropriately modifying it within the scope of its gist. Unless otherwise specified, the measurement of each physical parameter in this specification is performed at room temperature and pressure. In addition, in this specification, "~" means that the numerical values ​​at both ends are included as upper and lower limits unless otherwise specified. Furthermore, in this specification, drawings are referred to as appropriate to explain the present embodiment, etc., and unless otherwise specified, the positional relationship such as up, down, left, right, etc. will be explained based on the positional relationship shown in the drawings. Here, the dimensional ratios in the drawings do not indicate the actual ratios, and the actual ratios are not limited to the ratios shown in the drawings.

[0011] [Goods] The article according to the first aspect of this embodiment (hereinafter also referred to as "first article") is an article comprising a substrate and an adhesive portion disposed on a surface of the substrate, the surface having a first region, a second region and a third region in this order, the first region, the second region and the third region each having a covered portion where the substrate is covered with the adhesive portion and an exposed portion where the substrate is not covered with the adhesive portion, and the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region and the third region. Since the first article is configured as described above, it can suppress the occurrence of upper and lower wrinkles during attachment while achieving both excellent pressing ability and fixation ability. The boundary between the first region and the second region and the boundary between the second region and the third region in the first article are each located on the exposed portion. The article according to the second aspect of this embodiment (hereinafter also referred to as "second article") is an article comprising a substrate and an adhesive portion disposed on a surface of the substrate, the surface having a first region and a second region surrounded by the first region, the first region and the second region each having a covered portion where the substrate is covered with the adhesive portion and an exposed portion where the substrate is not covered with the adhesive portion, and the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region. Since the second article is configured as described above, it can suppress the occurrence of upper and lower wrinkles during application while achieving both excellent pressing properties and fixation properties. The boundary between the first region and the second region in the second article is located on the exposed portion. In this specification, unless otherwise specified, the following description of the article relates to both the first article and the second article. Also, the "article of the present embodiment" will be described as including the first article and the second article.

[0012] The article of the present embodiment is not particularly limited as long as it corresponds to the first or second article described above, and may take various forms. The article of the present embodiment can be a covering material for covering the surface of an input unit of a device, for example, the surface of an input unit having a push button. A typical example of such a covering material is a cover film, which can be attached to the input unit of a personal computer or various devices having an operation panel. The covering material is used, for example, in a state where it is temporarily attached to the surface of an input unit having a push button, and after a certain period of use, it is peeled off and discarded from the viewpoint of cleanliness. A specific example of using the covering material in such a manner is to attach the covering material to an electronic medical record keyboard or various testing equipment having an operation panel that is touched by multiple medical personnel in a hospital, thereby preventing the attachment of bacteria or viruses, blood, vomit, and other body fluids from directly attaching to the equipment. Each time the covering material is used, the old covering material is peeled off and discarded, and a new one is attached and used, thereby maintaining cleanliness in each operation and preventing cross-infection between medical personnel. Of course, its use is not limited to medical settings. For example, by using it on control panels and computers placed in environments where dirt easily accumulates, such as factories, it can prevent dirt from accumulating and suppress the occurrence of defects and breakdowns.

[0013] In addition, when the article of the present embodiment has a film shape, it can be distributed as a sheet product described later, or in the form of a roll. It is preferable that the first article is distributed in the form of a roll, and it is preferable that the second article is distributed in the form of a sheet product. The roll can also be distributed in a storage box.

[0014] Next, an application example of the article of this embodiment will be described based on the operation of a push button (a switch input unit constituting a keyboard, etc.), but the use of the article of this embodiment is not limited to this example. In addition, in the following, a cover film will be described as a typical form of the article of this embodiment, but the article of this embodiment is not limited to this example. Fig. 1 shows a cross-sectional view of a typical example of a pantograph-type key constituting a keyboard used in a notebook computer. A pantograph-type key 10 has a structure in which a key top 2 and a switch input part 3 face each other via a pantograph structure 1. An elastic member 4 is disposed between the key top 2 and the switch input part 3, and applies an upward biasing force to the key top 2 in a direction away from the switch input part 3. The inside below the elastic member 4 is hollow, and a downward pressing protrusion 4a is integrally formed within this cavity. In the state on the left side of Fig. 1, when the user presses the key top 2, the elastic member 4 is crushed by the key top 2 as the stroke increases, and the pressing protrusion 4a presses the switch input section 3, thereby obtaining a key input signal (state on the right side of Fig. 1). Looking at the relationship between the increase in stroke and the load shown in Fig. 2, the elastic member 4 elastically deforms and the load increases as the stroke increases, until the load reaches a peak load (F P When the stroke reaches the on-stroke (S O ), the pressing protrusion 4a comes into contact with the switch input portion 3, and a signal is transmitted. If the user presses the key top 2 further after the on-stroke, the load increases. On the other hand, when a user presses a key top with a cover film attached to the surface of the switch input unit 3, the cover film is stretched, which generates additional resistance. This is the pressing resistance, and the on-stroke (S O) and increases the load when the key is pressed. Such a pressing resistance not only reduces the usability of the keyboard, but can also cause non-input errors due to the switch input unit 3 not being pressed. Furthermore, when a user presses a key top 2 with a cover film attached to the surface of the switch input unit 3, the part of the cover film that contacts another key top close to the key top 2 is pulled toward the key top 2, which may cause the other key top to be pressed as well, which may cause an erroneous input error.

[0015] The reason why the above-mentioned pressing resistance occurs when the cover film is used will be explained in more detail. That is, the above-mentioned reasons include the resistance due to the mechanical properties of the base material of the cover film itself, and the resistance due to the cover film being attached to the surface of the switch input unit via the adhesive part. Regarding the latter, in order to prevent the cover film from being displaced or peeled off from the switch input unit, which would result in the purpose of protecting the switch input unit from contamination and the like being unachieved, a plurality of adhesive parts are arranged on the base material surface of the cover film at least in positions that come into contact with the switch input unit. Since the cover film is fixed to the switch input unit constituting the keyboard via the adhesive part, it is considered that the pressing resistance increases. On the other hand, the article of the present embodiment has the above-mentioned configuration, and thus has the following effects: When the article of the present embodiment is used as a cover film for a keyboard or the like, not only can the cover film be sufficiently fixed to the keyboard, but also deterioration in the usability of the keyboard can be suppressed, and no-input errors and erroneous input errors caused by attaching the cover film can be suppressed. Furthermore, since the first region, the second region, and the third region each have a covered portion where the substrate is covered with an adhesive portion, and an exposed portion where the substrate is not covered with an adhesive portion, the occurrence of wrinkles during application can be suppressed, and the appearance after application of the cover film is also improved. In addition, when the article of this embodiment is used as a cover film for a keyboard or the like, air tends to escape through the exposed portion (the portion where the adhesive portion is not arranged) to the outside of the film, and when the cover film is attached to the keyboard, air tends to be prevented from remaining in the film. From this viewpoint, in the article of this embodiment, it is preferable that at least two or more exposed portions in the first region are connected so that an edge portion located on the second region side of the first region and an edge portion located on the opposite side of the first region from the second region are connected. Similarly, in the first article, it is preferable that at least two or more exposed portions in the third region are connected so that an edge portion located on the second region side of the third region and an edge portion located on the opposite side of the third region from the second region are connected.

[0016] The switch input unit is not particularly limited as long as it is an input unit of an electronic device having a push button such as a key switch, and examples of the switch input unit include keyboards of desktop computers and notebook computers, push buttons of fixed telephones and mobile phones, push buttons of electronic devices such as medical devices, push buttons of remote controls of televisions, etc. The form of the push button is not particularly limited, and examples of the push button include mechanical switches, membrane switches, pantograph switches, and capacitive non-contact switches, depending on the difference in mechanism.

[0017] (base material) The article of this embodiment comprises a substrate. The shape of the substrate in the first article is not particularly limited as long as the surface of the substrate can have the first region, the second region, and the third region in this order, and can take various shapes depending on the object to be covered when the first article is used as a covering material, examples of which include a film shape and a sheet shape. The first region, the second region, and the third region are preferably arranged in this order along the width direction of the substrate (the direction (TD) perpendicular to the direction (MD) in which the substrate is extruded when the substrate is extrusion molded). Note that it is preferable that the pull-out direction when the first article is pulled out from the roll of this embodiment described later coincides with the MD. In the first article, the surface of the base material may consist of only the first region, the second region, and the third region. At least (I) the second region arranged in the center of the article and two independent regions (the first region and the third region) other than the second region are conceived, and (II) the relationship between the adhesive forces of the respective regions measured based on the method described in the examples below is the relationship described above for the first article, and (III) even if each region includes one or more sub-regions, the article can be treated as consisting of only the first region, the second region, and the third region. Regarding the above (III), for example, even if the second region in the first article includes one or more sub-regions that can be conceived by one or more boundaries along the arrangement pattern of the adhesive, the adhesive force is not measured only for the sub-regions, but the entire region including the sub-regions can be treated as the second region (the same applies to the first region and the third region). In addition, such sub-regions are not limited to the following, but in an example in which a keyboard is to be covered, regions that are appropriately set in consideration of operability at specific sites such as the periphery of the enter key, the periphery of the space key, and the periphery of the touchpad can be mentioned. More specifically, sub-regions in each region of the first article can be arranged to correspond to specific locations such as around the Enter key, around the space key and around the touchpad, and the local adhesion in the relevant locations can be adjusted by reducing the number of adhesive portions in the sub-region or using a less adhesive material as a constituent material for the adhesive portions in the sub-region. When the first article is used as a covering material for a keyboard or the like, the first, second and third regions are typically all belt-shaped regions and are divided as follows: The second region is typically positioned so as to cover a push button (an input part constituting a keyboard or the like) located in the center of a notebook computer keyboard or the like, and the first and third regions are typically positioned at both ends of the keyboard or the like and are positioned so as to cover parts other than the push button (an input part constituting a keyboard or the like) (see Figs. 3(A) and (B)). Thus, in the first article, the first, second and third regions of the substrate surface can be appropriately determined according to the shape of the object to which the first article is applied. In the first article, when the first region is a region having a band-like shape, its width is not particularly limited, but can typically be 1 mm or more and 100 mm or less, 3 mm or more and 75 mm or less, 5 mm or more and 50 mm or less, or 10 mm or more and 30 mm or less. In the first article, when the second region is a region having a band-like shape, its width is not particularly limited, but can typically be 50 mm or more and 200 mm or less, 60 mm or more and 175 mm or less, 70 mm or more and 150 mm or less, or 80 mm or more and 125 mm or less. In the first article, when the third region is a region having a band-like shape, its width is not particularly limited, but can typically be 1 mm or more and 150 mm or less, 3 mm or more and 125 mm or less, 5 mm or more and 100 mm or less, or 10 mm or more and 100 mm or less.

[0018] The shape of the substrate in the second article is not particularly limited as long as the surface of the substrate can have a first region and a second region surrounded by the first region. For example, when the second article is used as a coating material, it can take various shapes depending on the object to be coated, and examples of such shapes include a film shape and a sheet shape. In the second article, the surface of the base material may consist of only the first region and the second region. At least, if (i) the second region arranged in the center of the article and an independent region other than the second region (first region) are conceived, and (ii) the relationship between the adhesive forces of each region measured based on the method described in the examples below is the relationship described above for the second article, (iii) even if each region includes one or more sub-regions, the article can be treated as consisting of only the first region and the second region. For example, even if the second region in the second article includes one or more sub-regions that can be conceived by one or more boundaries along the arrangement pattern of the adhesive, the adhesive force is not measured only for the sub-regions, but the entire region including the sub-regions can be treated as the second region (the same applies to the first region). In addition, such sub-regions are not limited to the following, but in an example in which a keyboard is to be covered, there can be mentioned regions that are appropriately set in consideration of operability at specific sites such as around the enter key, around the space key, and around the touchpad. More specifically, sub-regions in each region of the second article can be arranged to correspond to specific locations such as around the Enter key, around the space key and around the touchpad, and the local adhesion in the relevant locations can be adjusted by reducing the number of adhesive portions in the sub-region or using a less adhesive material as a constituent material for the adhesive portions in the sub-region. When the second article is used as a covering material for a keyboard or the like, the first region and the second region are typically rectangular frame-shaped and rectangular regions, respectively, and are divided as follows: The second region is typically positioned so as to cover a push button (an input unit constituting a keyboard or the like) located in the center of the keyboard or the like, and the first region is typically positioned so as to cover a portion of the surface of the substrate other than the first region, other than the push button (an input unit constituting a keyboard or the like). Thus, in the second article, the first region and the second region on the substrate surface can be appropriately determined according to the shape of the application target of the second article. In the second article, when the first region is a region having a rectangular frame shape, the widths of the upper and left and right parts are not particularly limited, but can typically be 1 mm to 100 mm, 3 mm to 75 mm, 5 mm to 50 mm, or 10 mm to 30 mm. The width of the lower part is not particularly limited, but can typically be 1 mm to 150 mm, 3 mm to 125 mm, 5 mm to 100 mm, or 10 mm to 100 mm. In the second article, when the second region is a region having a rectangular shape, its width is not particularly limited, but can typically be 50 mm or more and 200 mm or less, 60 mm or more and 175 mm or less, 70 mm or more and 150 mm or less, or 80 mm or more and 125 mm or less.

[0019] (Base material components) In the article of the present embodiment, the components constituting the substrate are not particularly limited, but examples thereof include resins such as polyvinylidene chloride; polyolefins such as polyethylene and polypropylene; polyesters such as polyethylene terephthalate; ethylene / vinyl alcohol copolymers; ethylene / vinyl acetate copolymers; polyamides; and polyurethanes. Among these, polyvinylidene chloride is preferred from the viewpoints of cuttability when used in a presentation box and transparency (visibility of key printing) when attached to a keyboard. The components constituting the substrate may be used alone or in combination of two or more.

[0020] In the article of the present embodiment, polyvinylidene chloride usable includes vinylidene chloride homopolymers and vinylidene chloride copolymers of vinylidene chloride monomers and monomers copolymerizable therewith. Monomers copolymerizable with vinylidene chloride monomers are not particularly limited, but include, for example, vinyl chloride; acrylic acid esters such as methyl acrylate and butyl acrylate; acrylic acid; methacrylic acid esters such as methyl methacrylate and butyl methacrylate; methacrylic acid; methylacrylonitrile; vinyl acetate, etc. These copolymerizable monomers may be used alone or in combination of two or more. Polyvinylidene chloride may be used alone or in combination of two or more.

[0021] In the article of this embodiment, the weight average molecular weight (Mw) of the polyvinylidene chloride copolymer that can be used is preferably 5 × 10 4 ~1.5×10 5 and more preferably 6×10 4 ~1.3×10 5 and more preferably 7×10 4 ~1×10 5 The weight average molecular weight (Mw) is 5×10 4 By setting the weight average molecular weight (Mw) to 1.5×10 or more, the melting properties during extrusion tend to be improved. 5 When the molecular weight is equal to or less than 100%, the melt extrusion while maintaining thermal stability tends to be possible. In the present embodiment, the weight average molecular weight (Mw) can be determined by gel permeation chromatography (GPC) using a standard polystyrene calibration curve.

[0022] In the article of the present embodiment, the substrate may contain, in addition to the above-mentioned resin, other additives such as known plasticizers, heat stabilizers, colorants, organic lubricants, inorganic lubricants, surfactants, antistatic agents, processing aids, antioxidants, light stabilizers, ultraviolet absorbers, and antibacterial agents.

[0023] The plasticizer is not particularly limited, but examples thereof include fatty acid esters such as acetyl tributyl citrate, acetylated monoglyceride, and dibutyl sebacate.

[0024] The heat stabilizer is not particularly limited, but examples thereof include epoxidized vegetable oils such as epoxidized soybean oil and epoxidized linseed oil, epoxy resins, magnesium oxide, hydrotalcite, and the like.

[0025] In the article of the present embodiment, when the substrate has a film shape, it may be a stretched film or an unstretched film, but it is preferably a stretched film. Compared to an unstretched film, a stretched film has a high resilience to stress and tends to have a small hysteresis loss. Usually, in the case of a film with a small resilience to stress, when a certain amount of stress is applied, that portion tends not to return to its original state from the stretched state. For example, in the case of a cover film as the article of the present embodiment being attached to a keyboard and typing, the cover film near the key that is pressed is temporarily stressed by typing the key, but in the case of a stretched film having a high resilience, the cover film near the key that is pressed is easily restored to its original state, and the cover film can be prevented from being overstretched. Whether the substrate is a stretched film or not can be determined, for example, by measuring the heat shrinkage rate as described below. The heat shrinkage rate here is determined by cutting a 100 mm square film sample from the substrate, placing the sample in an air oven-type thermostatic chamber set at a predetermined temperature, and heat-treating the sample for 1 minute, measuring the shrinkage amount in the MD (the direction in which the substrate is extruded when the substrate is extrusion-molded; hereinafter also referred to as the "flow direction") and the shrinkage amount in the TD (the direction perpendicular to the MD; hereinafter also referred to as the "width direction") of the film at each temperature, and dividing the values ​​by the dimension before shrinkage, i.e., 100 mm, is the average percentage ratio. As a result of the above measurement, a film having a heat shrinkage rate of 20% or more when left standing at 120°C for 10 minutes can be determined to be a stretched film. Such a stretched film tends to have less hysteresis loss and higher recovery when used repeatedly. Thus, the higher the recovery, the better the operability during use tends to be. In this way, when the substrate is a stretched film, problems such as typos and the stretched portion getting caught on a push button and rupturing the film tend to be more effectively prevented compared to unstretched films, which do not recover after stress is applied and remain fully stretched.

[0026] (2% strain elastic modulus of base material) In the article of the present embodiment, the 2% strain elastic modulus in the machine direction (MD) and the transverse direction (TD) of the substrate is preferably 190 to 550 MPa, more preferably 200 to 500 MPa, and even more preferably 200 to 400 MPa. When the 2% strain elastic modulus in the machine direction (MD) and the transverse direction (TD) is within the above range, the operability tends to be further improved. Furthermore, partial stretching of the substrate tends to be suppressed. The 2% strain elastic modulus of the substrate in the machine direction (MD) and transverse direction (TD) can be controlled, for example, by selecting the type and grade of the resin that can constitute the substrate, the formulation of the additives that can be used, and adjusting the processing conditions accordingly. The 2% strain elastic modulus of the substrate in the machine direction (MD) and transverse direction (TD) can be measured by a conventional method.

[0027] (Tensile elongation of substrate) In the article of the present embodiment, the tensile elongation of the substrate in the machine direction (MD) and the transverse direction (TD) is preferably 60 to 200%, more preferably 70 to 180%, and even more preferably 90 to 160%. When the tensile elongation of the substrate in the machine direction (MD) and the transverse direction (TD) is within the above range, deterioration of operability tends to be less likely to occur. The tensile elongation of the substrate in the machine direction (MD) and transverse direction (TD) can be controlled, for example, by selecting the type and grade of the resin that can be used to compose the substrate, the formulation of additives that can be used, and adjusting the processing conditions accordingly. The tensile elongation of the substrate in the machine direction (MD) and transverse direction (TD) can be measured by a conventional method.

[0028] (Haze value of substrate) The haze value of the substrate is preferably 0.1% to 25%, more preferably 0.1% to 20%, and further preferably 0.1% to 10%. When the haze value of the substrate is within the above range, the visibility of the keys is improved, and erroneous input tends to be prevented. The haze value of the substrate can be adjusted by the type of resin that can constitute the substrate, the thickness of the substrate, and the like. The haze value can be measured with reference to ASTM D-1003.

[0029] (Substrate thickness) The thickness of the substrate is preferably 5 to 60 μm, more preferably 7 to 50 μm, and further preferably 10 to 40 μm. When the thickness of the substrate is within the above range, the operability and tear resistance tend to be further improved.

[0030] (Adhesive part) The article of the present embodiment comprises a plurality of adhesive portions partially disposed on the surface of a substrate. In the first article, a plurality of adhesive portions are arranged in all of the first region, the second region, and the third region on the surface of the substrate. Here, the adhesive portions are arranged so that each of the first region, the second region, and the third region has a covered portion where the substrate is covered with the adhesive portion, and an exposed portion where the substrate is not covered with the adhesive portion. By arranging the adhesive portions in this manner, when the first article is used as a cover film for a keyboard or the like, it is possible to suppress the occurrence of wrinkles during application, and the appearance after application of the cover film is also improved. In the second article, a plurality of adhesive portions are arranged in all of the first and second regions on the surface of the substrate. Here, the adhesive portions are arranged so that each of the first and second regions has a covered portion where the substrate is covered with the adhesive portion and an exposed portion where the substrate is not covered with the adhesive portion. By arranging the adhesive portions in this manner, when the second article is used as a cover film for a keyboard or the like, it is possible to suppress the occurrence of wrinkles during application, and the appearance after application of the cover film is also improved.

[0031] (Adhesive strength) In the first article, the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region and the third region. Due to the adhesive strength gradient between the regions, when the first article is used as a cover film for a keyboard or the like, it is possible to prevent a decrease in the fixation property of the film while ensuring the pressing property. In the second article, the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region. Due to the adhesive strength gradient between the regions, when the second article is used as a cover film for a keyboard or the like, it is possible to prevent a decrease in the fixation property of the film while ensuring the pressing property. In this embodiment, the adhesive strength of each region can be evaluated by various methods commonly used in this technical field, and it is sufficient if the magnitude of the adhesive strength between the regions can be grasped by using the methods. For example, when the physical properties (composition and properties of the adhesive) of the adhesive parts in each region can be evaluated as being all the same, the magnitude relationship of the arrangement density of the adhesive parts in each region (for example, the coverage ratios C1 to C3 described later) can be regarded as the magnitude relationship of the adhesive strength of each region. However, even when the physical properties (composition and properties of the adhesive parts) of the adhesive parts in each region cannot be evaluated as being all the same or when the physical properties are not known, the adhesive strength of each region can be evaluated as follows. In this embodiment, the adhesive strength of each region can be measured with reference to the 180° peel adhesive strength of JIS Z0237. Specifically, a sample is obtained by cutting out a predetermined width and length of 150 mm along the MD from each region of the article of this embodiment, and the sample is subjected to a tensile measurement with reference to the 180° peel adhesive strength of JIS Z0237. The average value of five measurements of the maximum peel strength (report unit: N / 25 mm) can be used as the adhesive strength value. At this time, the measurement region is set as follows. That is, a measurement region of 25 mm in width (current width if less than 25 mm) and 150 mm in length is set so as to include at least one independent adhesive portion, and the total area of ​​the adhesive portion within the width 25 mm (current width if less than 25 mm) and length 150 mm is set so that the total area of ​​the adhesive portion within the width 25 mm (current width if less than 25 mm) and length 150 mm is maximized, and the adhesive strength in the measurement region is measured as described above. More specifically, when each region is composed of dot-like adhesive portions, the area is set to 3×10 -4 cm 2 More than 0.8cm 2For a dot-like adhesive group consisting of the dot-like adhesive parts below, a measurement area of ​​25 mm wide (current width if less than 25 mm) and 150 mm long is set so that at least one independent dot-like adhesive part is included, and the total area of ​​the dot-like adhesive parts within the width 25 mm (current width if less than 25 mm) and length 150 mm is maximized, and the adhesive force in the measurement area is measured as described above. In addition, when each area is composed of a linear adhesive part, a measurement area of ​​25 mm wide (current width if less than 25 mm) and 150 mm long is set so that at least one independent linear adhesive part is included, and the total area of ​​the linear adhesive parts within the width 25 mm (current width if less than 25 mm) and length 150 mm is maximized, and the adhesive force in the measurement area is measured as described above. More specifically, the adhesive force can be measured based on the method described in the examples below. Similarly, when the 180-degree peel force is measured, the minimum value is 0 in areas where multiple adhesive portions do not exist continuously in a specified direction, and values ​​taking such values ​​into account are not used from the perspective of appropriately evaluating the performance of the article of this embodiment.

[0032] In the first article, the adhesive strength of the adhesive portions in the first and third regions, measured with reference to the 180° peel adhesive strength of JIS Z0237, is preferably 0.01 to 0.5 N / 25 mm, more preferably 0.02 to 0.3 N / 25 mm, even more preferably 0.03 to 0.2 N / 25 mm, and still more preferably 0.03 to 0.1 N / 25 mm. In the second article, the adhesive strength of the adhesive portion in the first region, measured with reference to the 180° peel adhesive strength of JIS Z0237, is preferably 0.01 to 0.5 N / 25 mm, more preferably 0.02 to 0.3 N / 25 mm, even more preferably 0.03 to 0.2 N / 25 mm, and still more preferably 0.03 to 0.1 N / 25 mm. In the article of this embodiment, when the adhesive portion is not disposed over the entire surface of each region on the substrate (each region has an exposed portion), and the adhesive strength of the adhesive portion in each region is within the above-mentioned range, the article has an excellent balance between adhesion and peelability, and furthermore, the operability of the input section having push buttons is less likely to decrease, and the appearance after the film is attached tends to be improved. Methods for controlling the adhesive strength of the adhesive portion in each region within the above range are not particularly limited, but examples include a method of adjusting the coverage area rate of the adhesive portion described below, as well as a method of adjusting the type and hardness of the material constituting the adhesive portion, the arrangement of the adhesive portion, the thickness of the adhesive portion, and the surface roughness of the adhesive portion.

[0033] In the first article, the adhesive strength of the adhesive portion in the second region, measured with reference to the 180° peel adhesive strength of JIS Z0237, may be smaller than the adhesive strength of the adhesive portion in the first region and the third region, and the numerical value is not particularly limited. The adhesive strength of the adhesive portion in the second region is preferably 85% or less, more preferably 50% or less, of the adhesive strength of the adhesive portion in the first region and the third region. When the difference in adhesive strength between the regions in the first article is within the above range, the balance between the adhesiveness and peelability is excellent, the decrease in operability of the input unit having the push button can be further suppressed, and the appearance after application tends to be improved. In the second article, the adhesive strength of the adhesive part in the second region, measured with reference to the 180° peel adhesive strength of JIS Z0237, may be smaller than that of the adhesive part in the first region, and the numerical value is not particularly limited. The adhesive strength of the adhesive part in the second region is preferably 85% or less, more preferably 50% or less, of the adhesive strength of the adhesive part in the first region. When the difference in adhesive strength between the regions in the second article is within the above range, the balance between the adhesiveness and peelability is excellent, the decrease in operability of the input part having the push button can be further suppressed, and the appearance after application tends to be improved.

[0034] (Coverage area rate) In the first article, in each of the first region, the second region, and the third region, the adhesive portion includes a dot-like adhesive portion, and in each of the first region, the second region, and the third region, -4 cm 2 More than 0.8cm 2 The total area of ​​the dot-like adhesive group composed of the dot-like adhesive portions having the following is preferably 50% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region, and the coverage area ratio calculated by the following method in each of the first region, the second region, and the third region is preferably 0.1% or more and 90% or less. By having the coverage area ratio within the above range, there is a tendency that the balance between adhesion and peeling properties is excellent, and the decrease in operability of the input unit having a push button can be further suppressed. From the same viewpoint, the area of ​​the dot-like adhesive group is more preferably 80% or more and 100% or less, and more preferably 90% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region. In the second article, in each of the first region and the second region, the adhesive portion includes a dot-like adhesive portion, and in each of the first region and the second region, an area of ​​3×10 -4 cm 2 More than 0.8cm 2 The area of ​​the dot-like adhesive covering group composed of the dot-like adhesive portions below is 50% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region, and the coverage area ratio calculated by the following method in each of the first region and the second region is preferably 0.1% or more and 90% or less. By having the coverage area ratio within the above range, there is a tendency that the balance between adhesion and peeling properties is excellent and the decrease in operability of the input unit having a push button can be more suppressed. From the same viewpoint, the area of ​​the dot-like adhesive covering group is more preferably 80% or more and 100% or less, and more preferably 90% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region. (Method of measuring coverage area ratio) For the group of adhesive dots, a measurement area of ​​1 cm square containing at least one independent adhesive dot was set so that the total area of ​​the adhesive dots within the 1 cm square was maximized, and the ratio of the total area of ​​the adhesive dots in the measurement area / 1 cm was calculated. 2 Calculate the coverage area rate by multiplying by 100. Specifically, the coverage rate can be measured based on the method described in the Examples below. The total area of ​​the dot-like adhesive portions or linear adhesive portions can be measured with a general measuring device such as a ruler or a vernier caliper, and in the case of adhesive portions having other shapes or minute adhesive portions, the area can also be calculated by binarizing an image obtained by a microscope or the like. Methods for controlling the coverage area rate in each region within the above range are not particularly limited, but examples include, as with the method of adjusting the adhesive strength described above, methods for adjusting conditions such as the type and hardness of the material constituting the adhesive portion, the arrangement of the adhesive portion, the thickness of the adhesive portion, and the pressure applied when forming the adhesive portion.

[0035] In the first article, from the same viewpoint as above, the coverage area ratio of the second region is preferably 100% or less of the coverage area ratios of the first region and the third region, more preferably 85% or less, and even more preferably 70% or less. Also, in the first article, from the same viewpoint as above, the coverage area ratio of the second region is preferably 0.1% or more and 75% or less, more preferably 1% or more and 60% or less, and even more preferably 2% or more and 45% or less. Furthermore, in the first article, from the same viewpoint as above, the coverage area ratio of the first region and the third region is preferably 5% or more and 90% or less, more preferably 10% or more and 80% or less, and even more preferably 15% or more and 70% or less.

[0036] In the second article, from the same viewpoint as above, the coverage area ratio of the second region is preferably 100% or less of the coverage area ratio of the first region, more preferably 85% or less, and even more preferably 70% or less. Also, in the second article, from the same viewpoint as above, the coverage area ratio of the second region is preferably 0.1% or more and 75% or less, more preferably 1% or more and 60% or less, and even more preferably 2% or more and 45% or less. Furthermore, in the second article, from the same viewpoint as above, the coverage area ratio of the first region is preferably 5% or more and 90% or less, more preferably 10% or more and 80% or less, and even more preferably 15% or more and 70% or less.

[0037] In the article of the present embodiment, "the adhesive portion is dot-like" means that one dot-like adhesive portion is within a range of at least 1 cm x 1 cm, and the specific shape is not particularly limited, and examples thereof include a circle, an approximately circle, a semicircle, an approximately semicircle, an ellipse, an approximately ellipse, a semi-ellipse, an approximately semi-ellipse, a polygon, and the like. The arrangement rule of the dot-like adhesive is not particularly limited, but a regular arrangement is preferable from the viewpoint of aesthetics. Examples of regular arrangements include a 60° staggered type (see FIG. 4(A)), a square staggered type (see FIG. 4(B)), a parallel type (see FIG. 4(C)), and a staggered type (see FIG. 4(D)) of dot-like adhesive portions of different sizes, as shown in FIG. 4. In the article of the present embodiment, the adhesive portion preferably includes dotted adhesive portions and / or linear adhesive portions, and more preferably includes only dotted adhesive portions and / or linear adhesive portions.

[0038] In the article of this embodiment, the area is 3×10 -4 cm 2 More than 0.8cm 2When a measurement area is set that includes at least one independent adhesive part and has a maximum total area of ​​the adhesive parts within the 1 cm square, the number of dot-like adhesive parts included in the measurement area of ​​each area is preferably 1 or more, more preferably 2 or more, and even more preferably 5 or more. The greater the number, the more the exposed part and the covered part are dispersed, and the more the variation in operability of each push button tends to be suppressed. For this reason, the upper limit of the number of adhesive parts included in the measurement area is not particularly limited, but from the viewpoint of manufacturing, it is preferably 250 or less, more preferably 100 or less, and even more preferably 50 or less. In addition, the dot-like adhesive part group specified when setting the measurement area is preferably 100 or less in area. -4 cm 2 More than 0.8cm 2 The adhesive group may be composed of only dot-like adhesive parts having an area of ​​3×10 or less. -4 cm 2 "Point-like adhesive parts with an area of ​​less than 0.8 cm2" or " 2 However, arranging many such dot-like adhesive parts tends to lead to problems in manufacturing, etc. From this viewpoint, the dot-like adhesive part group is preferably a group having an area of ​​3×10 -4 cm 2 More than 0.8cm 2 It is preferable that the adhesive layer is composed only of dot-like adhesive portions as described below.

[0039] The coverage C1 of the first region in the first article, calculated as the total area of ​​the adhesive portion in the first region / the area of ​​the first region×100(%), is preferably 3 to 90%, more preferably 10 to 65%, and even more preferably 20 to 40%. The coverage rate C2 of the second region in the first article, calculated as the total area of ​​the adhesive portion in the second region / the area of ​​the second region×100(%), is preferably 1 to 90%, more preferably 2 to 50%, and even more preferably 3 to 35%. The coverage rate C3 of the third region in the first article, calculated as the total area of ​​the adhesive portion in the third region / the area of ​​the third region×100(%), is preferably 3 to 90%, more preferably 10 to 65%, and even more preferably 20 to 40%. The coverage C1 of the first region in the second article, calculated as the total area of ​​the adhesive portion in the first region / the area of ​​the first region×100(%), is preferably 3 to 90%, more preferably 10 to 65%, and even more preferably 20 to 40%. The coverage rate C2 of the second region in the second article, calculated as the total area of ​​the adhesive portion in the second region / the area of ​​the second region×100(%), is preferably 1 to 90%, more preferably 2 to 50%, and even more preferably 3 to 35%.

[0040] As an example of the arrangement of the adhesive parts in the first article, the same unit rows composed of dot-like adhesive parts may be arranged in each of the first region, the second region, and the third region, as shown in FIG. 5. The unit row distance (arrangement interval of unit rows) L2 in the second region is preferably 0.5 mm to 20 mm, more preferably 1 mm to 15 mm, even more preferably 4 mm to 9 mm, even more preferably 4 mm to 8 mm, and even more preferably 4 mm to 7 mm. The unit row distance of the adhesive parts in the first region and the third region is preferably smaller than L2. This not only achieves good pressing ability and fixation ability, but also makes it easy for the degree of overlap of the adhesive parts to be the same in the first region, the second region, and the third region when the article is wound into a roll, so that when stress relaxation of the wound article occurs due to aging or a high-temperature environment during distribution, the difference in the degree of tightness in the roll tends to be small. If the difference in the degree of tightness of the roll is small, it is possible to prevent partial slackness from occurring when the article is pulled out and attached for use, which tends to make it easier to attach the article without wrinkles, and this is preferable.

[0041] As another example of the arrangement of the adhesive parts in the first article, as shown in FIG. 6, the adhesive parts may be arranged in the second region with a bundle of a plurality of unit rows as one constituent unit. The bundle-to-bundle distance (arrangement interval) L2 in the second region is preferably 0.5 mm to 20 mm, more preferably 1 mm to 15 mm, even more preferably 4 mm to 9 mm, still more preferably 4 mm to 8 mm, and even more preferably 4 mm to 7 mm. The unit row-to-unit row distance (arrangement interval) of the adhesive parts in the first region and the third region is preferably smaller than L2, and the interval between the unit rows constituting one bundle in the second region is preferably equal to or smaller than the interval between the unit rows of the adhesive parts in the first region and the third region. The number of unit rows constituting one bundle is not limited, but is preferably 2 to 10 rows, more preferably 2 to 5 rows, and even more preferably 3 to 4 rows. When the adhesive portions are arranged in this manner in each region, not only can good pressing properties and fixation properties be achieved, but also when the article is wound into a roll, the degree of overlap of the adhesive portions tends to be the same in the first region, the second region, and the third region, so that when stress relaxation of the wound article occurs due to aging or a high-temperature environment during distribution, the difference in the degree of tightness of the roll tends to be small. In addition, particularly when the size of the dot-like adhesive portions is small, even if the film-like article meanders during the manufacturing process of the roll, the degree of overlap of the adhesive portions tends to be the same in the first region, the third region, and the second region, so that when stress relaxation of the wound article occurs due to aging or a high-temperature environment during distribution, the difference in the degree of tightness of the roll tends to be small.

[0042] As another example of the arrangement of the adhesive portions in the first article, for example, as shown in FIG. 7, unit rows and bundles of unit rows may be arranged alternately in the second region, and instead of unit rows of dot-like adhesive portions, linear adhesive portions may be arranged as unit rows as exemplified in FIG. 8, FIG. 9, and FIG. 10. In this case, the specific shape of the line is not particularly limited, and may be a wavy line or a diagonal line. In addition, the linear adhesive portions may extend in a direction different from that shown in FIG. 8 to 10. That is, the linear adhesive portions may extend along the MD of the first article as exemplified in FIG. 8 to 10, or may extend along the TD of the first article as exemplified in FIG. 11.

[0043] The width of each region in the article of this embodiment can be adjusted arbitrarily, but assuming that the article is attached to a keyboard currently on the market, the width of the second region is preferably about 100 to 120 mm in both the first article and the second article. In the first article, the first region and the third region are arranged above and below the second region, for example, as shown in Figs. 12(A) and (B), and the width W1 of the first region and the width W3 of the third region are preferably about 10 to 30 mm, respectively. In the second article, the first region is arranged so as to surround the second region (above, below, left and right of the second region), for example, as shown in Figs. 12(C) and (D), and the widths W1, W3, T1, and T2 of the first region are preferably about 10 to 30 mm, respectively. When the first article is applied as a covering material for a laptop computer or the like, the width W3 of the third region is preferably about 60 to 90 mm so as to cover the touchpad. This tends to prevent the touchpad from becoming dirty or being deteriorated by wiping it with a liquid agent. Similarly, when the second article is used as a covering for a laptop computer or the like, it is preferable to set the width W3 of the first region to about 60 to 90 mm so as to cover the touchpad section, which tends to prevent the touchpad section from becoming dirty or being deteriorated by wiping it with a liquid agent.

[0044] (Ingredients that make up the adhesive part) In the article of the present embodiment, the component constituting the adhesive portion is not particularly limited, but examples thereof include urethane-based adhesives, acrylic-based adhesives, rubber-based adhesives, silicone-based adhesives, ethylene / vinyl acetate adhesives, etc. The component constituting the adhesive portion may be used alone or in combination of two or more kinds. In order to cover the surface of an input unit having a push button, the adhesive is temporarily attached, and after a certain amount of use, the adhesive is peeled off and discarded from the viewpoint of cleanliness. Therefore, rather than being strongly adhesive, it is preferable that the adhesive has an adhesive strength that allows a person to attach and peel it off by hand, and has excellent releasability so that no glue remains on the surface to which it is attached. Furthermore, if an adhesive having such adhesiveness is entangled between one adhesive part and another adhesive part inside an article, the entanglement is easily untangled, making it easier to handle. From this viewpoint, among the above adhesives, urethane-based adhesives, silicone-based adhesives, acrylic-based adhesives, and rubber-based adhesives are preferred, and urethane-based adhesives are more preferred.

[0045] In the article of the present embodiment, the urethane-based adhesive that can be used is an adhesive containing polyurethane obtained by condensing compounds having an isocyanate group and a hydroxyl group, and tends to have excellent air escape properties during application work and excellent properties for peeling without leaving adhesive residue (removability). The urethane-based adhesive is not particularly limited, but examples thereof include polyether-based polyurethane, polyester-based polyurethane, etc.

[0046] The silicone-based adhesive that can be used in the article of this embodiment is an adhesive that contains a polymer having a siloxane bond as the main skeleton, and tends to have a wide usable temperature range and excellent air escape properties during application.

[0047] In the article of the present embodiment, the acrylic adhesive that can be used is an adhesive containing a (meth)acrylic polymer, and for example, a comonomer that can be copolymerized with a (meth)acrylic acid alkyl ester as a main monomer can be added to adjust the cohesive force, or a comonomer containing a specific functional group can be added to provide a crosslinking point to adjust the hardness of the adhesive, thereby enabling the desired adhesive force to be expressed. The main monomer used in the acrylic adhesive is not particularly limited, but examples thereof include various (meth)acrylic acid alkyl esters such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate, and these can be used alone or in combination. The comonomer is not particularly limited, but examples thereof include vinyl acetate, acrylonitrile, acrylamide, and styrene. The functional group-containing monomer is not particularly limited, but examples thereof include acrylic acid, hydroxyethyl acrylate, acrylamide, and glycidyl methacrylate.

[0048] The adhesive part in the article of the present embodiment may contain a tackifier resin such as rosin, terpenes, aliphatic and aromatic synthetic resins, etc., from the viewpoint of adjusting the adhesive strength. In addition to the above, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, etc. may be added to the adhesive part. Biomass raw materials may be used as the raw material of the adhesive part.

[0049] From the viewpoint of adhesive strength of the adhesive part, the thickness of the adhesive part in the article of the present embodiment is preferably 1 μm to 30 μm, more preferably 3 μm to 25 μm, and even more preferably 5 μm to 25 μm. When the thickness of the adhesive part is within the above range, when the article of the present embodiment is used as a covering material for a keyboard or the like, the adhesiveness to the keyboard and removability tend to be further improved.

[0050] (Release layer) The article of the present embodiment may further include a release layer that covers the back surface of the substrate (the surface opposite to the surface on which the adhesive portion is disposed). By providing the release layer, the article tends to be easier to pull out when wound. The components forming the release layer are not particularly limited, but examples thereof include silicone-based resins and long-chain alkyl pendant polymer-based resins. In addition to the above resins, the article may contain other additives such as known plasticizers, heat stabilizers, colorants, organic lubricants, inorganic lubricants, surfactants, antistatic agents, processing aids, antioxidants, light stabilizers, ultraviolet absorbers, and antibacterial agents.

[0051] In the article of the present embodiment, the long-chain alkyl pendant polymer-based resin that can be contained in the release layer is not particularly limited, and examples thereof include a polymer of a long-chain alkyl acrylate having 12 or more carbon atoms, a copolymer of a long-chain alkyl acrylate and another vinyl monomer, a long-chain alkyl modified polymer obtained by reacting a long-chain alkyl component such as a long-chain alkyl isocyanate with polyvinyl alcohol, etc. By providing such a release layer, the article tends to be able to be fixed to a keyboard or the like while being more easily pulled out when rolled up.

[0052] In the article of the present embodiment, the thickness of the release layer is preferably 0.1 μm to 1.0 μm, more preferably 0.15 μm to 0.9 μm, and even more preferably 0.2 μm to 0.7 μm. By setting the thickness of the release layer within the above range, the drawability when wound into a roll tends to be further improved.

[0053] (Other components) The article of the present embodiment may have a print layer or a primer layer between the substrate and the adhesive portion. In addition, the article of the present embodiment may have a release paper or a release resin film attached to the adhesive portion from the viewpoint of protecting the adhesive portion and convenience when attaching the adhesive portion to an object to be adhered, as long as the desired effect of the present embodiment is not impaired.

[0054] <Item thickness> The thickness of the article of the present embodiment is preferably 10 μm to 80 μm, more preferably 15 μm to 70 μm, and even more preferably 20 to 60 μm. By having the thickness within the above range, flexibility tends to be further improved. When the thickness is 80 μm, for example, when the article is used as a covering material for a keyboard or the like, it tends to be possible to prevent difficulty in key input, and when the thickness is 10 μm or more, even if entanglement occurs between one adhesive part and another adhesive part inside one article due to binding, the entanglement becomes easy to untangle, and it also tends to be possible to prevent tearing during key input.

[0055] (2% strain tensile load on item) The 2% strain tensile load in the machine direction (MD) and the 2% strain tensile load in the cross direction (TD) of the article of this embodiment are each independently 0.8 to 1.6 N / cm, preferably 0.8 to 1.5 N / cm, and more preferably 0.8 to 1.4 N / cm. By having the 2% strain tensile load within the above range, the handleability tends to be further improved. The 2% strain tensile load can be adjusted by the thickness of the substrate, the thickness of the adhesive portion, the coating area ratio of the adhesive, etc. The 2% strain tensile load in the machine direction (MD) and cross direction (TD) of the article can be measured by the method described in the examples below.

[0056] (Haze value of the item) The haze value of the article of this embodiment is preferably 0.1% to 25%, more preferably 0.1% to 20%, and even more preferably 0.1% to 10%. When the haze value of the article is within the above range, the visibility of the keys is improved and erroneous input tends to be prevented. The haze value of the article can be adjusted by the type of resin that can constitute the substrate, the thickness of the substrate, the type of material that constitutes the adhesive portion, the thickness of the adhesive portion, the coating area ratio of the adhesive portion, and the like. The haze value can be measured with reference to ASTM D-1003.

[0057] [Method of manufacturing an article] The manufacturing method of the article of the present embodiment (hereinafter also referred to as the "manufacturing method of the present embodiment") is not particularly limited as long as it is a method that forms an adhesive portion in a predetermined area on the surface of a substrate and obtains a first article or a second article.

[0058] Examples of methods for obtaining the substrate include a method including a step of extruding a resin from a circular die as a single-layer or multi-layer raw sheet, and a step of cooling and solidifying the extruded raw sheet. If necessary, the above-mentioned steps may be carried out by blending known additives such as plasticizers, antioxidants, and stabilizers together with the resin.

[0059] In the article of the present embodiment, when the substrate is a stretched film, the manufacturing method of the present embodiment may further include a stretching step in which the substrate extruded from the die is stretched in MD and TD. The stretching method in the stretching step is not particularly limited, and may be uniaxial stretching or biaxial stretching. As a specific method of biaxial stretching, a sequential or simultaneous biaxial stretching method or an inflation biaxial stretching method can be adopted. Specifically, the stretching in TD is performed by the internal pressure of air injected into the unstretched tube by a bubble inflation method or the like, and the stretching in MD can be performed by adjusting the speed ratio between the roll for sending out the unstretched tube provided upstream of the TD stretching section and the roll for winding the stretched laminated tube provided downstream. As another method, when an unstretched film is used, stretching in the TD can be performed by applying tension to the width of the unstretched film using pinch clips, such as by a tenter method, and stretching in the MD can be performed by adjusting the speed ratio between a roll for feeding the unstretched film, which is provided upstream of the TD stretching section, and a roll for taking up the stretched film, which is provided downstream. In this case, the stretching ratio is preferably 2.5 to 7.5 in both MD and TD.

[0060] The article of the present embodiment can be obtained as a roll by, for example, applying an adhesive to the substrate obtained as described above using a gravure coater or a comma coater, drying, winding, and aging at 40° C. for 2 days. Before applying the adhesive, a primer having affinity for both the adhesive portion and the substrate may be applied to the substrate, or the substrate may be subjected to a corona treatment, a plasma treatment, or the like in order to adjust the surface tension of the substrate. In addition, a release layer may be formed on the back surface of the substrate before or after the process of applying the adhesive.

[0061] [Rolled body] The wound body of the present embodiment is not particularly limited as long as it includes the article of the present embodiment, and may include a core tube and the article of the present embodiment wound around the core tube. Such a wound body preferably includes a core tube and a first article wound around the core tube.

[0062] (core tube) The material of the core tube is not limited, and may be made of, for example, paper, plastic, metal, etc. The core tube may be a hollow cylinder or a solid columnar body. The diameter of the core tube is not limited, and may be, for example, 10 mm to 50 mm.

[0063] The wound body of the present embodiment may not have a core tube. For example, the wound body of the present embodiment may be obtained by continuously forming and winding the article of the present embodiment. Such a wound body is preferably obtained by continuously forming and winding the first article.

[0064] [Leaflet] The article of this embodiment can be used as a sheet body in addition to the rolled body described above.

[0065] [Storage box] The storage box of the present embodiment includes a main body having a front plate, a bottom plate, a rear plate, and side plates and opening at the top, the wound body of the present embodiment stored in the main body, and a lid arranged to be able to open and close the opening at the top, the lid having a top plate connected to an upper edge of the rear plate, and a cover piece connected to a front edge of the top plate. Since the storage box of the present embodiment is configured as described above, the shape of the article of the present embodiment can be maintained in the wound body, and the required amount of the article of the present embodiment can be easily pulled out.

[0066] The storage box of the present embodiment preferably includes a means for drawing out the article of the present embodiment from the main body. Here, for example, by making the wound body of the present embodiment freely rotatable within the main body, a required amount of the article of the present embodiment can be drawn out from the wound body of the present embodiment through an opening in the main body.

[0067] Furthermore, the storage box of this embodiment may include a means for cutting the article pulled out from the roll. This allows the required amount of pulled out articles to be easily cut. In the storage box of this embodiment, it is more preferable that a cutting portion is provided at the lower edge of the cover piece as a means for cutting the article pulled out from the core tube. The means for cutting the article is not particularly limited, but may be, for example, a slide cutter in addition to a saw blade made of metal, paper, plastic, etc. Among them, a metal saw blade is preferable because it can exhibit stable cutting properties. The saw blade is preferably provided to be slightly longer than the width of the article, and its overall shape is preferably straight, but may also be V-shaped or a gentle arc shape.

[0068] The pulling force when pulling out the article of this embodiment from the wound body of this embodiment and / or the storage box of this embodiment is preferably 5 to 300 cN / 220 mm width, more preferably 10 to 200 cN / 220 mm width, and even more preferably 10 to 100 cN / 220 mm width. By having the pulling force within the above range, there is a tendency that the required amount of the article can be pulled out with a light force. There is no particular limitation on the method for controlling the pulling force for pulling the article from the core tube within the above range. For example, in addition to setting the adhesive strength of the article, a release layer may be provided on the back surface of the article. The above-mentioned extraction force can be measured based on the method described in the Examples below. EXAMPLES

[0069] The present embodiment will be described in detail below with reference to examples, but the present embodiment is not limited to these examples. Unless otherwise specified, the measurement of each physical parameter of the film-shaped article (hereinafter also referred to as "cover film") obtained in the following examples and comparative examples (hereinafter also referred to as "each example") was performed at room temperature and normal pressure.

[0070] [Adhesive strength P] In order to directly evaluate the adhesive strength of the adhesive part in each region, the following measurement was carried out with reference to the measurement of 180° peeling adhesive strength of JISZ0237. That is, a sample was obtained by cutting out a width of 25 mm (or the actual width if less than 25 mm) and a length of 150 mm along the MD from each region of the cover film obtained in each example. This sample was attached to a SUS304 mirror-finished plate by reciprocating twice at 10 mm / sec using a 2 kg weight roller. A tensile measurement was carried out in the 180° direction from the SUS mirror-finished plate at a speed of 300 mm / min, and the average value of five measurements (report unit: N / 25 mm) for the maximum 180° peel strength was taken as the value of adhesive strength P. A texture analyzer EZ-SX manufactured by Shimadzu Corporation was used as the measuring device. In addition, when measuring each area, the measurement area was set as follows: A measurement area was set to a width of 25 mm (current width if less than 25 mm) and a length of 150 mm so as to include at least one independent adhesive portion, and the total area of ​​the adhesive portion within the width of 25 mm (current width if less than 25 mm) and length of 150 mm was set to be maximum, and the adhesive strength in the measurement area was measured as described above. More specifically, when each region is composed of dot-like adhesive parts, the area is 3 × 10 -4 cm2 More than 0.8cm 2 A measurement area of ​​25 mm in width (current width if less than 25 mm) and 150 mm in length was set to include at least one independent adhesive dot, and the total area of ​​the adhesive dots within the 25 mm in width (current width if less than 25 mm) and 150 mm in length was maximized, and the adhesive strength in the measurement area was measured as described above. In addition, when each region is composed of linear adhesive portions, a measurement region of 25 mm wide (current width if less than 25 mm) and 150 mm long was set for a linear adhesive portion group composed of linear adhesive portions having a width of 0.1 mm to 10 mm, which included at least one independent linear adhesive portion, and in which the total area of ​​the linear adhesive portions within the width of 25 mm (current width if less than 25 mm) and length of 150 mm was maximized, and the adhesive force in the measurement region was measured as described above.

[0071] [Coverage area ratio S1~S3] The coverage rate (%) in each region was measured as follows. In each of the first region, the second region, and the third region, the area is 3×10 -4 cm 2 More than 0.8cm 2 A group of dot-like adhesive parts was identified, which is composed of dot-like adhesive parts that are as follows: For the group of dot-like adhesive parts, a measurement area of ​​1 cm square containing at least one independent dot-like adhesive part was set so that the total area of ​​the dot-like adhesive parts within the 1 cm square was maximized, and the ratio of the total area of ​​the dot-like adhesive parts in the measurement area / 1 cm square was calculated. 2 The coverage area rate was calculated by multiplying by 100.

[0072] [Coverage C1~C3)] The coverage rate of each region was calculated as follows for a cover film (220 mm width × 320 mm length) pulled out from a roll of cover film described below. The coverage rate C1 (%) of the first region was calculated as the total area of ​​the adhesive portion in the first region / the area of ​​the first region × 100 (%). Similarly, the coverage rate C2 (%) of the second region was calculated as the total area of ​​the adhesive portion in the second region / the area of ​​the second region × 100 (%), and the coverage rate C3 (%) of the third region was calculated as the total area of ​​the adhesive portion in the third region / the area of ​​the third region × 100 (%).

[0073] [Thickness] The cover film obtained in each example was cut along its thickness direction using a microtome, and the cut surface was observed with an optical microscope (Keyence VHX-900) to measure the thickness of the cover film. This was further measured every 1 m in the MD (unwinding direction) of the cover film, and the average value of 10 points was finally taken as the thickness of the cover film (μm). The thickness of the adhesive part was observed and measured with an optical microscope (Keyence VHX-900) in the same manner as the method for measuring the thickness of the cover film, and further measured every 1 m in the MD (unwinding direction) of the cover film, and the average value of 10 points was finally taken as the thickness of the adhesive part (μm).

[0074] [Visibility: Haze] The haze value of the cover film obtained in each example was measured with reference to JIS K7136. Specifically, the diffuse transmittance and total light transmittance of the cover film were measured under an environment of 23°C temperature and 50% relative humidity, and the haze value of the cover film was calculated using the following formula. The average value of five measurements was taken as the haze value of the cover film. For the measurement, a haze meter NDH8000 manufactured by Nippon Denshoku Industries Co., Ltd. was used. HAZE(%)=Diffuse transmittance / total light transmittance×100

[0075] [2% strain tensile load] The 2% strain tensile load in the machine direction (MD) and transverse direction (TD) of the cover film obtained in each example was measured as follows. That is, the cover film obtained in each example was cut into a width of 10 mm and a length of 100 mm at an arbitrary position along the MD and TD to prepare a sample, and the load was measured when the cover film was stretched by 2% (i.e., stretched by 2 mm) at a pulling speed of 5 mm / min. The average value of five measurements was taken as the 2% strain tensile load value in each of the MD and TD. The measuring device used was a Texture Analyzer EZ-SX manufactured by Shimadzu Corporation.

[0076] [Drawing force] The cover film obtained in each example (all 220 mm wide) was wound up on a paper tube for 10 m, and the sample was aged at 28°C for one week. An acrylic cylinder and a steel rod with a diameter of 12 mm were fitted into a rotatable fixture connected via a bearing, and the steel rod was fixed to a tensile tester, allowing the acrylic cylinder and the cover film wound up on the paper tube to rotate freely. In this state, the end of the cover film was fixed to a 250 mm wide plate directly connected to the load cell of the tensile tester, and the load generated when the cover film was pulled out at a speed of 1000 mm / min was taken as the pulling force, and the average value of five measurements was taken as the measured value (cN / 220 mm). A texture analyzer EZ-SX manufactured by Shimadzu Corporation was used for the measurement.

[0077] [Scroll appearance] The rolled form of the cover film obtained in each example was evaluated as follows after storing for one week at room temperature and at 40°C. The diameter of the rolled body was measured using a vernier caliper. At this time, the diameter of the area where the adhesive part was arranged was measured as the diameter of the overlapping part of the adhesive part. A: When the surface of the wound body is visually observed, the difference between the diameter of the wound body corresponding to both ends (first region and third region) and the diameter of the wound body corresponding to the center (second region) is 0 mm or more and less than 0.2 mm. B: When the surface of the wound body is visually observed, the difference between the diameter of the wound body corresponding to both ends (first region and third region) and the diameter of the wound body corresponding to the center (second region) is 0.2 mm or more and less than 0.5 mm. C: When the surface of the wound body is visually observed, the difference between the diameter of the wound body corresponding to both ends (first region and third region) and the diameter of the wound body corresponding to the center (second region) is 0.5 mm or more and less than 0.8 mm. D: When the surface of the wound body is visually observed, the difference between the diameter of the wound body corresponding to both ends (first region and third region) and the diameter of the wound body corresponding to the center (second region) is 0.8 mm or more.

[0078] 〔wrinkle〕 The rolled cover film obtained in each example was stored at 40°C, and then 400 mm of the cover film was pulled out and cut, and the wrinkles at both ends (first and third regions) and the center (second region) were evaluated as follows. Both ends (after attaching the cover film to a smooth ABS plate for 1 minute without wrinkling the center of the cover film) A: Visually inspect both ends of the cover film to see if there are any wrinkles. B: Visually inspect both ends of the cover film and find wrinkles in several places. C: Visually inspect both ends of the cover film and find multiple wrinkles. D: Both ends of the cover film are visually inspected and there are numerous wrinkles. Center section (after sticking to a commercially available keyboard for 1 minute without wrinkling) A: Visually inspect the center of the cover film and check that there are no wrinkles that impair the visibility of the key printing. B: Visually inspect the center of the cover film and find that there are several wrinkles that impair the visibility of the key printing. C: Visually inspect the center of the cover film and find multiple wrinkles that impair the visibility of the key printing. D: Visually inspect the center of the cover film and find numerous wrinkles that impair the visibility of the key printing.

[0079] [Operability] The cover films obtained in each example were attached to a commercially available keyboard as a keyboard cover, and the keys were then repeatedly touched (typing 20,000 random Japanese characters) to evaluate whether any missing or incorrect input occurred (all operations were performed by the same tester). (Evaluation Criteria) A: Entry errors due to omissions or incorrect entries 50 characters or less B: 51 to 100 characters or less due to missing or incorrect input. C: More than 101 characters are missing or incorrectly entered.

[0080] [Fixation during use] The cover film obtained in each example was attached to a commercially available keyboard as a keyboard cover, and the keys were repeatedly touched (random Japanese sentences were typed) to evaluate whether the relative position of the cover film to the keyboard changed (misalignment occurred) and / or whether the cover film peeled off (all operations were performed by the same tester). Specifically, the evaluation was based on the following criteria. (Evaluation Criteria) A: After 2,000 characters were typed, no shifting and / or peeling of the cover film was observed. B: After 1,500 characters were typed, the cover film was found to have shifted and / or peeled off. C: After 1,000 characters were typed, the cover film was displaced and / or peeled off.

[0081] [Example 1] (Production of base film) To 100 parts by mass of vinylidene chloride-vinyl chloride copolymer (vinylidene chloride monomer unit content / vinyl chloride monomer unit content=80% by mass / 20% by mass, weight average molecular weight 120000, hereinafter referred to as "PVDC"), 3 parts by mass of dibutyl sebacate as fatty acid esters, 3 parts by mass of acetyl tributyl citrate, and 2 parts by mass of epoxidized soybean oil as an epoxidized compound were added and mixed for 5 minutes with a Henschel mixer. The resulting mixture was extruded into a tubular shape with a melt extruder, supercooled in a cold water bath at about 10°C, passed through water at 35°C, and stretched at a stretching temperature of 30°C, 3.9 times in the longitudinal direction (MD) and 4.4 times in the transverse direction (TD), to obtain a tubular film, which was folded with a pinch roll to produce a flat, long film with a thickness of 42 μm. It was then peeled into a single film using a slitter to obtain a 21 μm substrate film.

[0082] (Cover film manufacturing) A urethane adhesive (main agent: Cyabain SH-101 (100 parts by mass), curing agent: Cyabain T-501B (5 parts by mass), manufactured by Toyochem Chemical Co., Ltd.) was applied in a regular dot pattern on the surface of a separator (a silicone-treated polyethylene terephthalate (PET) sheet) using a gravure coater (gravure cell depth: 250 μm) to obtain a separator with an adhesive. That is, the application position of the adhesive was adjusted so that a plurality of circular adhesive parts having a diameter of 1 mm were formed, and these gave a predetermined pattern for each region on the surface of the base film. More specifically, a plurality of adhesive parts arranged in a row with a gap of 1 mm was treated as a unit row (hereinafter, also simply referred to as a "unit row"). At both ends of the separator surface (a first region having a width of 20 mm and a third region having a width of 90 mm), the distance between the unit rows was 0.7 mm, and each unit row was arranged so as to give a 60° staggered pattern as a whole. On the other hand, in the center of the separator surface (second region with a width of 110 mm), a bundle of three unit rows (the distance between unit rows in the bundle was 1 mm, and the unit rows in the bundle were arranged to give a 60° staggered pattern, and hereinafter, simply referred to as a "three-row bundle") and a single unit row were alternately arranged at an interval of 4 mm. The above-mentioned base film and separator with adhesive were laminated and wound up, and after aging at 40°C for two days, a back treatment agent (Peiroil 1050, manufactured by Lion Specialty Chemicals Co., Ltd.) was applied to the other side of the base film, and the separator was delaminated to produce a cover film. The thickness of the adhesive part after delamination was 22 μm. In the cover film according to Example 1 obtained as described above, the adhesive parts of each region were formed using the same material and by the same method, so that the physical properties (composition and properties of the adhesive part) were all evaluated to be the same.

[0083] (Manufacturing of cover film rolls) The cover film (width: 500 mm, length: 300 m) produced as above was slit to a width of 220 mm, and the cover film was wound around a cylindrical core tube at a length of 10 m / min in the flow direction to produce a cover film roll (width = 220 mm). In the cover film roll obtained, the pull-out force of the cover film was 17 cN / 220 mm width. An explanatory diagram of the appearance of the cover film pulled out from this cover film roll is shown in Figure 13. Note that Figure 13 is a diagram solely for illustrating the arrangement pattern of the adhesive portion, and the exact dimensions of the cover film can be understood from the above explanation of Example 1 and the values ​​listed in Table 1.

[0084] The physical properties of the base film, adhesive portion, cover film, and cover film roll obtained as described above are shown in Table 1. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 1, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0085] [Example 2] Except for changing the shape of the adhesive from a circle with a diameter of 1 mm to a square with sides of 1 mm, a cover film was produced in the same manner as in Example 1, and a roll of the cover film was produced. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 2, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0086] [Example 3] Except for changing the material of the base film to an unstretched PE film, a cover film was produced in the same manner as in Example 1, and a roll of the cover film was produced. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 3, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0087] [Example 4] A cover film was produced and a roll of the cover film was produced in the same manner as in Example 1, except that the adhesive coating pattern was changed to alternately arrange three-row bundles and one unit row at intervals of 6 mm in the second region. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 4, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed from the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1 that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region.

[0088] [Example 5] A cover film was produced in the same manner as in Example 1, except that the adhesive coating pattern was changed to alternately arrange three-row bundles and one unit row at intervals of 9 mm in the second region, and a cover film roll was produced. The roll shape, fixation during use, and keyboard operability were excellent. As for the adhesive strength of the cover film according to Example 5, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0089] [Example 6] A separator (a silicone-treated polyethylene terephthalate (PET) sheet) was coated with a urethane-based adhesive (main agent: Saiabain SH-101 (100 parts by mass), curing agent: Saiabain T-501B (5 parts by mass), manufactured by Toyochem Chemical Co., Ltd.) in a regular dot pattern as shown in FIG. 14 using a gravure coater (gravure cell depth: 250 μm) to obtain a separator with adhesive. That is, the coating position of the adhesive was adjusted so that a plurality of circular adhesive parts having a diameter of 1 mm were formed and these gave a predetermined pattern for each region of the substrate film surface. More specifically, at both ends of the separator surface (first region having a width of 20 mm and third region having a width of 90 mm), the distance between the unit rows was set to 1 mm, and each unit row was arranged so as to give a 60° staggered pattern as a whole. Meanwhile, in the center of the separator surface (second region having a width of 110 mm), a bundle of three rows was arranged at intervals of 3 mm. A cover film was produced in the same manner as in Example 1, except that the separator with adhesive thus obtained was used, and a cover film roll was produced. In the cover film according to Example 6 obtained as described above, the adhesive parts of each region were formed by the same method using the same material, so that the physical properties (composition and properties of the adhesive parts) were all evaluated as being the same. An explanatory diagram of the appearance of the cover film pulled out from this cover film roll is shown in FIG. 14. Note that FIG. 14 is a diagram solely for showing the arrangement pattern of the adhesive parts, and the exact dimensions of the cover film can be understood from the above explanation of Example 6 and the numerical values ​​listed in Table 1. The results were excellent in the roll shape, wrinkles of the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 6, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0090] [Example 7] A cover film was produced and a roll of the cover film was produced in the same manner as in Example 6, except that the adhesive coating pattern was changed to arranging three rows of bundles at intervals of 6 mm in the second region. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 7, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0091] [Example 8] A cover film was produced and a roll of the cover film was produced in the same manner as in Example 6, except that the adhesive coating pattern was changed to arrange three rows of bundles at intervals of 9 mm in the second region. The roll had excellent roll shape, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 8, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0092] [Example 9] A separator (a silicone-treated polyethylene terephthalate (PET) sheet) was coated with a urethane adhesive (main agent: Cyabain SH-101 (100 parts by mass), curing agent: Cyabain T-501B (5 parts by mass), manufactured by Toyochem Chemical Co., Ltd.) in a regular dot pattern as shown in FIG. 15 using a gravure coater (gravure cell depth: 250 μm) to obtain a separator with adhesive. That is, the coating position of the adhesive was adjusted so that a plurality of circular adhesive parts having a diameter of 1 mm were formed and these gave a predetermined pattern for each region on the surface of the base film. More specifically, at both ends of the separator surface (a first region having a width of 20 mm and a third region having a width of 90 mm), the distance between the unit rows was set to 1 mm, and each unit row was arranged so as to give a 60° staggered pattern overall. On the other hand, in the center of the separator surface (second region with a width of 110 mm), the unit rows were arranged so that the distance between the unit rows was 2 mm, and an overall 60° staggered pattern was given. A cover film was produced in the same manner as in Example 1, except that the separator with adhesive thus obtained was used, and a cover film roll was produced. In the cover film according to Example 9 obtained as described above, the adhesive parts of each region were formed using the same material and by the same method, so that the physical properties (composition and properties of the adhesive parts) were all evaluated to be the same. An explanatory diagram of the appearance of the cover film pulled out from this cover film roll is shown in FIG. 15. Note that FIG. 15 is a diagram solely for showing the arrangement pattern of the adhesive parts, and the exact dimensions of the cover film can be understood from the above explanation of Example 9 and the numerical values ​​described in Table 1. The results were excellent in the winding shape of the roll, wrinkles of the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 9, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0093] [Example 10] A cover film was produced and a roll of the cover film was produced in the same manner as in Example 9, except that the adhesive coating pattern was changed to arrange the unit rows at a distance of 4 mm in the second region. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 10, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0094] [Example 11] A cover film was produced in the same manner as in Example 9, except that the adhesive coating pattern was changed so that the unit rows were spaced 9 mm apart in the second region, and a roll of the cover film was produced. The roll had excellent shape, stability during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 11, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0095] [Example 12] A cover film was produced in the same manner as in Example 9, except that the adhesive coating pattern was changed to arrange the unit rows at a distance of 14 mm in the second region, and a cover film roll was produced. The results were excellent in visibility, ease of pulling out the roll, keyboard operability, and fixation when pasting. The results were excellent in the roll shape, fixation when used, and keyboard operability. As for the adhesive strength of the cover film according to Example 12, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0096] [Example 13] A cover film was produced in the same manner as in Example 1, except that the adhesive coating pattern was changed to a linear adhesive having a width of 1 mm for the unit row, and a roll of the cover film was produced. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 13, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0097] [Example 14] The adhesive coating pattern was changed to a φ1 mm / pitch 2 mm / 60° staggered pattern over the entire surface of the separator, and the adhesive type in the second region was changed so that the adhesive strength in the second region was smaller than that in the first and third regions (note that a urethane adhesive (main agent: Cyabain SH-101 (100 parts by mass), hardener: Cyabain T-501B (7 parts by mass), manufactured by Toyochem Chemical Co., Ltd.) was used as the adhesive in the second region). Except for this, a cover film was manufactured in the same manner as in Example 1, and a cover film roll was manufactured. In the cover film according to Example 14 obtained as described above, the adhesive portion in the second region was formed using a material different from the adhesive portions in the first and third regions, and therefore it was evaluated that the physical properties of the adhesive portion differed between the regions. The results were excellent in the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film of Example 14, as mentioned above, it was evaluated that the physical properties of the adhesive portion differed between the regions, and therefore, based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1, it was evaluated that the adhesive strength of the adhesive portion in the second region was smaller than the adhesive strength of the adhesive portion in the first region and the third region.

[0098] [Example 15] Except for changing the adhesive coating pattern to φ1 mm / pitch 2 mm / 60° staggered for the first and third regions and φ1 mm / pitch 6 mm / 60° staggered for the second region, a cover film was produced in the same manner as in Example 1, and a roll of the cover film was produced. The results were excellent in terms of the roll shape, wrinkles in the cut product, fixation during use, and keyboard operability. As for the adhesive strength of the cover film according to Example 15, since the physical properties of the adhesive parts in each region were all evaluated to be the same as described above, the adhesive strength of the adhesive part in the second region was evaluated to be smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the coverages C1 to C3 shown in Table 1. Furthermore, it was confirmed that the adhesive strength of the adhesive part in the second region was smaller than the adhesive strength of the adhesive part in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1.

[0099] [Comparative Example 1] The adhesive coating pattern was changed so that a linear adhesive was placed over the entire surface of the positions corresponding to the first and third regions in Example 1 (i.e., a linear adhesive with a width of 20 mm was placed in the first region; a linear adhesive with a width of 90 mm was placed in the third region), and the adhesive was not placed in the position corresponding to the second region in Example 1. Except for this, a cover film was produced in the same manner as in Example 1, and a cover film roll was produced. In the cover film according to Comparative Example 1 obtained as described above, the first and third regions in the cover film according to Example 1 were changed to "regions where no exposed portion exists", and it was evaluated that these regions do not correspond to the "first region" and "third region" in this embodiment. In addition, in the cover film according to Comparative Example 1, the second region in the cover film according to Example 1 was changed to "regions where no adhesive portion exists", and it was evaluated that this region does not correspond to the "second region" in this embodiment. The keyboard operability was good, but the fixation during use was somewhat poor, and the roll shape and wrinkles of the cut product were inappropriate. As described above, the cover film of Comparative Example 1 does not have the "first region," "second region," and "third region" defined in this embodiment, so it is not possible to grasp the magnitude relationship between the adhesive strength of the adhesive portion in the second region and the adhesive strength of the adhesive portions in the first and third regions, and therefore it was evaluated as not falling under the article of this embodiment.

[0100] [Comparative Example 2] As for the adhesive coating pattern, linear adhesive was arranged over the entire surface of the positions corresponding to the first and third regions in Example 1 (i.e., linear adhesive with a width of 20 mm was arranged at the position corresponding to the first region in Example 1; linear adhesive with a width of 90 mm was arranged at the position corresponding to the third region in Example 1), and the unit rows were arranged over the entire surface of the second region with a unit row distance of 1 mm. Except for this, a cover film was manufactured in the same manner as in Example 1, and a cover film roll was manufactured. In the cover film according to Comparative Example 2 obtained as described above, the first and third regions in the cover film according to Example 1 were changed to "regions without exposed parts", and the regions were evaluated as not corresponding to the "first region" and "third region" in this embodiment. The fixation during use was good, but the keyboard operability was somewhat poor, and the roll shape of the roll and the wrinkles of the cut product were inappropriate. As described above, the cover film of Comparative Example 2 does not have the "first region" and "third region" defined in this embodiment, so it is not possible to grasp the magnitude relationship between the adhesive strength of the adhesive portion in the second region and the adhesive strength of the adhesive portions in the first and third regions, and therefore it was evaluated as not falling under the article of this embodiment.

[0101] [Comparative Example 3] The adhesive coating pattern was changed to a φ1 mm / pitch 2 mm / 60° staggered pattern over the entire surface of the separator, and the adhesive type in the first and third regions was changed so that the adhesive strength in the second region was greater than that in the first and third regions (note that a urethane adhesive (main agent: Cyabain SH-101 (100 parts by mass), curing agent: Cyabain T-501B (7 parts by mass), manufactured by Toyochem Chemical Co., Ltd.) was used as the adhesive in the first and third regions). Except for this, a cover film was manufactured in the same manner as in Example 1, and a cover film roll was manufactured. In the cover film according to Comparative Example 3 obtained as described above, the adhesive portion in the second region was formed using a material different from the adhesive portions in the first and third regions, so that the physical properties of the adhesive portions were evaluated to be different between the regions. The roll shape, wrinkles in the cut product, and keyboard operability were good, but the fixation during use was inadequate. As for the adhesive strength of the cover film according to Comparative Example 3, since the physical properties of the adhesive portion were evaluated to be different between the regions as described above, the adhesive strength of the adhesive portion in the second region was evaluated to be greater than the adhesive strength of the adhesive portion in the first region and the third region based on the magnitude relationship understood from the measurement results of the adhesive strength P shown in Table 1. In other words, the cover film according to Comparative Example 3 was evaluated as not corresponding to the article of the present embodiment.

[0102] [Table 1]

[0103] The evaluation results for each cover film are shown in Table 2 below.

[0104] [Table 2]

Claims

1. An article comprising a substrate and an adhesive portion disposed on a surface of the substrate, the surface having a first region, a second region, and a third region in this order; The first region, the second region, and the third region each have a covered portion where the base material is covered with the adhesive portion, and an exposed portion where the base material is not covered with the adhesive portion, An article, wherein the adhesive strength of the adhesive portion in the second region is smaller than the adhesive strength of the adhesive portion in the first region and the third region.

2. In each of the first region, the second region, and the third region, the adhesive portion includes a dot-like adhesive portion, Each of the first region, the second region, and the third region has an area of ​​3×10 -4 cm 2 More than 0.8 cm 2 the total area of ​​the dot-like adhesive portion group composed of the dot-like adhesive portions having the following characteristics is 50% or more and 100% or less with respect to 100% of the total area of ​​the adhesive portions in each region, 2. The article according to claim 1, wherein the coverage area ratio of each of the first region, the second region, and the third region, calculated by the following method, is 0.1% or more and 90% or less: (Method of measuring coverage area ratio) A measurement area of ​​1 cm square containing at least one independent dot-like adhesive portion is set for the dot-like adhesive portion group, and the total area of ​​the dot-like adhesive portions within the 1 cm square is set to be maximum, and the total area of ​​the dot-like adhesive portions in the measurement area / 1 cm 2 The coverage area rate is calculated by multiplying the result by 100.

3. The article of claim 2 , wherein the area coverage of the second region is less than or equal to 100% of each of the area coverage of the first region and the third region.

4. The coverage area ratio of the second region is 0.1% or more and 75% or less, The article according to claim 2 , wherein the coverage area ratio of each of the first region and the third region is 5% or more and 90% or less.

5. The article of claim 1 , further comprising a release layer covering a backside of the substrate.

6. 10. The article of claim 1 used to cover a surface of an input portion of a device.

7. A core tube and The article according to claim 1 wound around the core tube; A wound body comprising:

8. A roll obtained by continuously forming and rolling the article according to claim 1.

9. A main body having a front panel, a bottom panel, a rear panel, and side panels and an opening at the top surface; The wound body according to claim 7, which is housed in the main body portion; A lid portion arranged to be able to open and close the opening on the top surface; Equipped with The lid portion is A top plate connected to an upper edge of the back plate; A cover piece connected to a front edge portion of the top plate; A storage box having

10. The storage box according to claim 9 , further comprising a cutting section that cuts the article pulled out from the roll.

11. An article comprising a substrate and an adhesive portion disposed on a surface of the substrate, The surface has a first region and a second region surrounded by the first region, The first region and the second region each have a covered portion where the base material is covered with the adhesive portion and an exposed portion where the base material is not covered with the adhesive portion, An article, wherein the adhesive strength of the adhesive portion in the second region is less than the adhesive strength of the adhesive portion in the first region.

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