Belt material and method for manufacturing the belt material

Abstract

To provide a belt material having a surface layer which can be formed without blurring of a printed mark.SOLUTION: The belt material obtained by laminating at least a base material layer 2 and a hot melt resin layer 7 has at least a layer to which printing is applied, wherein the hot melt resin layer is formed in contact with a printed surface of the layer to which printing is applied. A method for manufacturing the belt material comprises the steps of: performing printing on a surface of the base material layer; and forming the hot melt resin layer on a printed surface of the base material layer. The step of forming the hot melt resin layer on the printed surface of the base material layer includes a step of coating one surface of a release film 6 with a hot melt resin, a step of laminating the surface of the release film coated with the hot melt resin and the printed surface of the base material layer, and a step of peeling the release film from the hot melt resin.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a belt material and a method for manufacturing the belt material. [Background technology]

[0002] It is known that woven fabrics with conductive threads are used as belt materials for industrial belts such as belt conveyors to reduce static electricity generated by conveyor operation (see, for example, Patent Document 1). Such industrial belts are also used to transport food (see, for example, Patent Document 2). When used to transport food, marks are sometimes printed on the belt to assist in processing and other operations. To protect such marks and to protect the belt from contamination of food, etc., a surface layer (coating) is usually provided on the woven fabric that makes up the belt. In Patent Document 2, the surface layer of the belt is laminated and bonded to the woven fabric using a solvent-based adhesive.

[0003] However, when a surface layer is formed using a solvent-based adhesive, there are problems such as bleeding of marks provided on the woven fabric and the inclusion of air bubbles. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-48611 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-223727 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to provide a belt material having a surface layer on which printed marks can be formed without bleeding. [Means for solving the problem]

[0006] The object of the present invention is achieved by the following [1] to

[11] . [1] A belt material having at least a base material layer and a hot melt resin layer laminated together, the belt material having at least a printed layer, the hot melt resin layer being formed in contact with the printed surface of the printed layer; [2] The belt material according to the above [1], wherein the hot melt resin layer is a resin layer made of a reactive hot melt; [3] The belt material according to [1] or [2] above, wherein the printed layer is a substrate layer; [4] The belt material according to any one of [1] to [3] above, which has a resin layer laminated on one surface of a base layer, and the printed layer is the resin layer; [5] The belt material according to any one of [1] to [4] above, wherein the base layer is made up of a plurality of layers; [6] A belt conveyor using the belt material according to any one of [1] to [5] above; [7] A method for manufacturing a belt material, comprising the steps of printing on a surface of a base layer and forming a hot melt resin layer on the printed surface of the base layer; [8] The method for manufacturing a belt material according to [7] above, wherein the step of forming a hot melt resin layer on the printed surface of the base material layer includes a step of applying a hot melt resin to one surface of a release film, a step of laminating the surface of the release film coated with the hot melt resin and the printed surface of the base material layer, and a step of peeling the release film from the hot melt resin; [9] A method for manufacturing a belt material, comprising the steps of forming a resin layer on one side of a substrate layer, printing on the surface of the resin layer, and forming a hot melt resin layer on the printed surface of the resin layer;

[10] The method for manufacturing a belt material according to [9] above, wherein the step of forming a hot melt resin layer on the printed surface of the resin layer includes a step of applying a hot melt resin to one surface of a release film, a step of laminating the surface of the release film coated with the hot melt resin and the printed surface of the resin layer, and a step of peeling the release film from the hot melt resin;

[11] The method for manufacturing a belt material according to any one of the above [7] to

[10] , wherein the hot melt resin layer is a resin layer made of a reactive hot melt. [Effects of the Invention]

[0007] According to the present invention, it is possible to provide a belt material having a surface layer on which printed marks can be formed without bleeding. [Brief explanation of the drawings]

[0008] [Figure 1] 1(a) and 1(b) are schematic diagrams showing the structure of a belt material according to at least one embodiment of the present invention. [Figure 2] FIG. 1(b) is a schematic diagram illustrating a method for manufacturing a belt material 1 according to at least one embodiment of the present invention. [Figure 3] FIG. 3(a) is a photograph of the base material layer 2 of Example 1 as seen from the conveyance side, and FIG. 3(b) is a photograph of the belt material 1 of Example 1 as seen from the conveyance side. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a mode for carrying out the present invention (hereinafter referred to as "the present embodiment") will be described in detail. Note that the present invention is not limited to the following embodiment, and various modifications can be made within the scope of the gist thereof.

[0010] In the following embodiments, the belt material will be described as an example of a belt used in a belt conveyor for transporting and guiding food, but the belt material of the present invention is not limited to this application. FIGS. 1(a) and 1(b) are side views showing the structure of a belt material corresponding to at least one embodiment of the present invention. As shown in FIG. 1(a), the belt material of this embodiment includes a base layer 2 and a surface layer 4. As shown in FIG. 1(b), the belt material 1 of this embodiment may also include the base layer 2, a resin layer 3 laminated on one side of the base layer 2, and the surface layer 4. Hereinafter, the side of the belt material 1 that contacts various pulleys such as a drive pulley provided on the belt conveyor will be referred to as the inner circumferential side, and the side opposite the inner circumferential side, i.e., the side on which the transported object is placed, will be referred to as the transport side or surface side.

[0011] As will be described in detail below, in this embodiment, the surface layer 4 is formed of a hot melt resin without using a solvent-based adhesive. In conventional belt materials, for example, marks or the like are printed on the surface of a base layer or the surface of a resin layer laminated on the base layer, and a surface layer is formed on the upper surface using a solvent-based adhesive. When a solvent-based adhesive is applied to such a printed surface, there is a problem that the printed marks or the like bleed. To solve this problem associated with the use of solvent-based adhesives and form a surface layer without the printed marks or the like bleed, this embodiment uses a hot melt resin.

[0012] (base material layer) The base layer 2 is a member provided on the inner circumferential side of the belt material 1, and one side thereof contacts various pulleys. The base layer 2 can be made of a material known as a base material for belt materials, such as a woven fabric or a sheet made of polyamide or polyester resin. The woven fabric can be made of a resin, for example. The resin can be selected depending on the object to be conveyed, and examples of the resin include polyester resin, polyvinyl resin, aramid resin, polyacrylic resin, and polyamide resin.

[0013] The base material layer 2 preferably contains conductive yarns. By including the conductive yarns in the base material layer 2, static electricity generated during conveyor operation can be prevented from being charged to the inner periphery of the base material layer 2. When the conductive yarns are woven into the warp threads of the woven fabric, the conductive yarns are arranged so as to be parallel to the conveying direction of the belt material 1.

[0014] The conductive thread is a conventionally known type, and can be made by immersing synthetic fiber or cotton thread in a conductive substance and then coating it with a conductive material. In order to effectively prevent static electricity buildup, it is preferable to use "Belltron" (registered trademark) manufactured by KB Seiren Co., Ltd. or "Megana" (registered trademark) manufactured by Unitika Ltd. The thickness of the conductive thread can be selected depending on the thickness of the substrate layer 2, which will be described later.

[0015] The base layer 2 may include a printed surface on the conveying side. When the belt material of this embodiment is used in a belt conveyor for conveying food, such as in food processing, it is expected that an operator will lift the food from the belt, work on it or visually inspect it, and then return the food to the belt. In such a case, if a mark indicating the position on the belt material 1 to return the food to is displayed so as to be visible from the surface of the belt material 1, the operator's work efficiency can be improved, and the conveyed food can be returned to the specified position on the belt material 1, thereby enabling the belt conveyor to operate stably.

[0016] The base layer 2 may be composed of a single layer or multiple layers. The base layer 2 composed of multiple layers is preferable in that the strength of the entire belt material can be increased. When the base layer 2 is composed of multiple layers, any combination of the materials constituting the base layer 2 described above may be used. When the base layer 2 is composed of multiple layers, each layer can be bonded by a hot melt resin, such as a non-reactive hot melt resin or a reactive hot melt resin, which will be described later. The amount of hot melt resin used to bond each layer is 200 g / m 2 It is preferable that the weight is 300 g / m or more. 2It is more preferable that the amount of hot melt resin used is equal to or more than that. In this case, there is no particular limitation on the upper limit of the amount of hot melt resin used, and it may be adjusted appropriately depending on the desired adhesive strength. When the base layer 2 is made up of multiple layers, it is sufficient that at least the inner peripheral side of the surface of the base layer 2 contains conductive threads, and each layer may be configured to contain conductive threads.

[0017] The total thickness of the base material layer 2 is preferably 3.0 mm or less, more preferably 2.0 mm or less, and even more preferably 1.5 mm or less. When the total thickness of the base material layer 2 is 3.0 mm or less, the pulley followability is good, and when it is 1.5 mm or less, the pin pulley followability is particularly good, which is preferable. There is no particular lower limit for the total thickness of the base material layer 2, but from the viewpoint of the strength of the belt material 1, it is preferably 0.5 mm or more, and more preferably 1.0 mm or more.

[0018] (resin layer) The resin layer 3 is a layer that is optionally provided on at least one surface of the base material layer 2. For example, depending on the application of the belt material, the resin layer 3 may be provided to impart strength to the base material layer or to protect the base material layer from contamination by food, chemicals, etc.

[0019] The resin layer 3 may be a layer without concealing properties, or may be a layer with concealing properties. When a resin layer with concealing properties is provided on one side of the base layer 2 as the resin layer 3, it is preferable that when the base layer 2 contains conductive threads, the conductive threads can be hidden from the conveying side of the belt material 1 on which the conveyed object is placed. Furthermore, when the resin layer 3 has a printed surface on which printing is performed as described below, it is preferable that a resin layer with concealing properties is provided as the resin layer 3, because the conductive threads contained in the base layer 2 are hidden and an invisible printed surface can be obtained.

[0020] The resin layer 3 can be formed from a resin such as polyurethane, polyvinyl chloride, polyolefin, or polyvinylidene fluoride. Among these, polyurethane is preferred in terms of compatibility with the surface 4. When the resin layer 3 is to have opacifying properties, it can be formed by mixing a desired pigment with these resins. Examples of pigments that can be used include inorganic pigments such as titanium oxide, calcium carbonate, hydrous chromium oxide, and cobalt aluminate, as well as organic pigments. When the resin layer 3 contains a pigment, the pigment content is preferably 1 part by mass or more, and more preferably 5 parts by mass or more, per 100 parts by mass of the resin that forms the resin layer 3. When the resin layer 3 contains a pigment, the pigment content is preferably 15 parts by mass or less, and more preferably 10 parts by mass or less, per 100 parts by mass of the resin that forms the resin layer 3.

[0021] The resin layer 3 may have a printed surface on the conveying side. When the surface of the resin layer 3 is printed, the work efficiency of the worker can be improved, as in the case where the surface of the base layer 2 is printed, and the conveyed food can be returned to a predetermined position on the belt material 1, thereby enabling the belt conveyor to operate stably.

[0022] The thickness of the resin layer 3 is preferably 1.0 mm or less, and more preferably 0.5 mm or less. When the thickness of the resin layer 3 is 1.0 mm or less, the resin layer 3 has good pulley conformability, and when the thickness is 0.5 mm or less, the resin layer 3 has good pulley conformability, and is particularly preferable. There is no particular lower limit to the thickness of the resin layer 3, but from the viewpoint of the strength of the belt material 1, the resin layer 3 is preferably 0.2 mm or more, and more preferably 0.3 mm or more.

[0023] (Surface layer) The surface layer 4 is provided on the conveying side of the base material layer 2 or the resin layer 3, and is the surface on which the conveyed object is placed. The surface layer 4 can be provided by melting a hot-melt resin once and then solidifying it. When the surface layer 4 is formed from a hot-melt resin, no solvent-based adhesive is used for laminating the surface of the base material layer 2 or the resin layer 3, which avoids the problems of bleeding of printed marks that occur with conventional solvent-based adhesives and the problem of solvent volatilization into the working environment or atmosphere. This is also preferable because it avoids problems such as the large amount of energy required for drying with water-based adhesives. Furthermore, even when a hot-melt resin is used, a belt material with excellent physical properties comparable to those of a solvent-based adhesive can be provided.

[0024] The hot melt resin that forms the surface layer can be either a non-reactive or reactive hot melt resin. Non-reactive hot melt resins are those that do not have reactive groups in their molecular structure, and known hot melt resins such as urethane resins, olefin resins, and polyester resins can be used. From the standpoint of processability, non-reactive hot melt resins preferably have a melt viscosity at 120°C of 6 mPa·s or more, more preferably 10 mPa·s or more. Furthermore, melt viscosity at 120°C of 100 mPa·s or less is preferably 50 mPa·s or less.

[0025] Reactive hot melt resins are hot melt resins that have reactive groups in their molecular structure, such as urethane resins with reactive groups such as isocyanate groups or hydroxyl groups. Urethane resins preferably have a melt viscosity at 120°C of 6 mPa·s or more, more preferably 10 mPa·s or more. Furthermore, urethane resins preferably have a melt viscosity at 120°C of 100 mPa·s or less, more preferably 50 mPa·s or less. Specific examples of such reactive hot melt resins include the "Tyforce H Series" manufactured by DIC Corporation and the "Hibon Series" manufactured by Hitachi Chemical Polymer Co., Ltd.

[0026] The amount of hot melt resin used is 200g / m 2 It is preferable that the weight is 300 g / m or more. 2 The upper limit of the amount of the hot melt resin used is not particularly limited, and may be adjusted appropriately depending on the desired adhesive strength.

[0027] The thickness of the surface layer 4 is preferably 0.05 mm or more, and more preferably 0.2 mm or more. When the thickness of the surface layer 4 is 0.05 mm or more, the surface of the belt material is sufficiently protected and durability against long-term use can be imparted. There is no particular upper limit to the thickness of the surface layer 4, but from the viewpoint of the strength of the belt material 1 and the pulley diameter, it is preferably 1.0 mm or less, and more preferably 0.5 mm or less.

[0028] The physical properties of the surface layer 4 are not particularly limited, but in order to fully impart its functionality as a belt material, that is, to have tensile strength and elasticity that do not affect the expansion and contraction of the belt due to bending or tension and do not break, the tensile strength of the surface layer 4 at 60°C is preferably 5 MPa or more, and more preferably 8 MPa or more. The elastic modulus is preferably 80 MPa or less, and more preferably 10 MPa or less. By setting the physical properties of the surface layer 4 formed from a hot melt resin within the above ranges, it is possible to obtain surface properties that are equivalent to or better than those of belt materials having a surface formed by a conventional coating.

[0029] The tensile strength and modulus of elasticity of the surface layer 4 can be determined by a test in accordance with JIS K 6251.

[0030] (Belt material manufacturing method) A method for manufacturing the belt material 1 of this embodiment will be described below. Fig. 2 is a schematic diagram for explaining a method for manufacturing the belt material 1 shown in Fig. 1(b), which corresponds to at least one embodiment of the present invention. In the following description, the steps can be interchanged within the scope that does not contradict the effects of the present invention.

[0031] First, a base layer 2 having a desired size is prepared. Next, as shown in FIG. 2(a), a resin layer 3 is formed on one side of the base layer 2. The step of forming the resin layer 3 can be carried out by a conventionally known method. Specific examples include forming the resin layer 3 by extrusion molding such as a T-die method, or a method in which an adhesive is applied to at least one side of the base layer 2 and one side of the resin layer 3, and the base layer 2 and the resin layer 3 are bonded and laminated together. Forming the resin layer 3 by extrusion molding is preferable because the adhesive strength between the base layer 2 and the resin layer 3 is stronger than that achieved by adhesive bonding.

[0032] When the base material layer 2 and the resin layer 3 are bonded and laminated using an adhesive, the adhesive may be a urethane adhesive or the like, although this depends on the resin of the resin layer 3.

[0033] The base material layer 2 on which the resin layer 3 has been formed is left at room temperature or cooled to room temperature and then subjected to the next step, which is a step of printing on the surface of the resin layer 3.

[0034] Printing of marks or the like on the surface of the resin layer 3 can be carried out by a conventionally known method, for example, by an inkjet printer or the like.

[0035] Next, a description will be given of the step of forming the surface layer 4 on the base material layer 2 on which the resin layer 3 has been formed. In this embodiment, the step of forming the surface layer 4 may be a step of melting and applying a hot melt resin 7 to the surface of the resin layer 3, or may include a step of applying the hot melt resin 7 to one side of a release film 6, a step of laminating the surface of the release film 6 on which the hot melt resin 7 has been applied and the printed surface of the resin layer 3, and a step of peeling off the release film 6.

[0036] In the process of melting and applying the hot melt resin 7 to the surface of the resin layer 3, the hot melt resin is melted at 120 to 130°C using a melting device, and then the hot melt resin 7 is applied to one side of the resin layer 3 using an application device such as a roll coater. Thereafter, the laminate is left to stand until the hot melt resin 7 solidifies. Through these processes, a belt material 1 is obtained in which the surface layer 4 made of the hot melt resin 7 is formed on the surface of the printed side of the resin layer 3.

[0037] Furthermore, when a release film 6 is used, in the step of applying a hot melt resin 7 to one side of the release film 6, a melting device is used to melt the hot melt resin at 120 to 130°C, and an application device such as a roll coater is used to apply the hot melt resin 7 to one side of the release film 6, as shown in Fig. 2(b). As the release film 6, a conventionally known releasable film can be used, and specifically, a PET film, a PTFE film, release paper, etc. can be used.

[0038] Next, as shown in FIG. 2(c), the surface of the release film 6 coated with the hot melt resin 7 and the printed surface of the resin layer 3 are laminated together using a roll press or the like (FIG. 2(d)). At this time, the surface temperature of the hot melt resin 7 before lamination may or may not be cooled to room temperature. The roll press temperature is preferably 60°C or higher, more preferably 80°C or higher. The roll press temperature is preferably 130°C or lower, more preferably 100°C or lower. By setting the roll press temperature within this range, the surface temperature of the hot melt resin 7 can be kept in a fluid state, for example, at 60 to 80°C. The roll press temperature and lamination method are not limited to those described above, as long as the hot melt resin 7 can be kept in a fluid state during lamination. After lamination, the laminate is left to stand until the hot melt resin 7 solidifies. Thereafter, as shown in FIG. 2(e), the release film 6 is peeled off to obtain a belt material 1 having a surface layer 4 made of the hot melt resin 7 formed on the printed surface of the resin layer 3.

[0039] The above describes a method for manufacturing a belt material 1 having a resin layer 3 on one side of a base layer 2 as shown in FIG. 1(b). However, the method for manufacturing a belt material of this embodiment can also be applied to a belt material 1 having the configuration shown in FIG. 1(a) that does not have a resin layer 3. That is, a base layer 2 having a desired size is prepared. Next, printing is performed on the surface of the base layer 2. Printing on the surface of the base layer 2 can be performed using an inkjet printer or the like, similar to printing on the surface of the resin layer 3. Next, a surface layer 4 is formed on the base layer 2. The surface layer 4 can be formed by the same method as the formation of the surface layer 4 on the surface of the resin layer 3 described above. In this manner, a belt material 1 is obtained in which a surface layer 4 made of a hot melt resin 7 is formed on the printed surface of the base layer 2. [Example]

[0040] The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples in any way.

[0041] (Example 1: Base layer + surface layer (reactive hot melt resin layer)) "SBT-2" manufactured by Poval Kogyo Co., Ltd. (a base layer consisting of two layers of laminated polyester fabric containing conductive yarn, with a total thickness of 1.2 mm) was prepared in a size of 240 mm wide and 5 m long. A desired mark was printed on the surface of the resin layer 3 using an inkjet printer.

[0042] Next, an isocyanate-based reactive hot melt resin (DIC Corporation, Tyforce H series, containing an isocyanate group as a reactive group, with a melt viscosity of 13.9 mPa·s at 120°C) was applied to one side of a PET film (release film 6) using a roll coater at 120°C to 130°C. The surface of the release film 6 coated with the hot melt resin 7 and the printed surface of the resin layer 3, on which the mark was printed, were laminated using a hand roll press. After lamination, the laminate was left at room temperature for 10 minutes until the hot melt resin 7 solidified. The release film 6 was then peeled off, and a surface layer 4 made of the hot melt resin 7 was formed on the printed surface of the resin layer 3, thereby obtaining a belt material 1.

[0043] The total thickness of the obtained belt material was 1.3 mm, and the thickness of the surface layer 4 was 0.1 mm. The weight of the belt material was 1.3 kg / m 2 The physical properties of the obtained belt material were measured according to the following measuring methods and are shown in Table 1.

[0044] <Coefficient of friction> The obtained belt material was subjected to a Taber abrasion test. The test conditions were in accordance with the inclined method of JIS P8147. The results are shown in Table 1.

[0045] <Wear index> The obtained belt material was subjected to an abrasion test using an abrasion tester (manufactured by Toyo Seiki Seisakusho, Ltd.) under the test conditions in accordance with JIS K 7204. The results are shown in Table 1.

[0046] <Tensile strength / Load at 1% elongation> The obtained belt material was subjected to a tensile strength test to determine the tensile strength and the load at 1% elongation. The test conditions were in accordance with JIS L 1096. The results are shown in Table 1.

[0047] (Reference example 1) A belt material was obtained in the same manner as in Example 1, except that instead of using a reactive hot melt resin, a surface layer 4 made of a polyurethane sheet (manufactured by Poval Kogyo Co., Ltd., product name: U90-0.3HM) was formed on the base material layer 2. As the adhesive for forming the surface layer 4 made of a polyurethane sheet, a solution-based adhesive (manufactured by Poval Kogyo Co., Ltd., product name: B-1 / BL) was used, and the adhesive was applied at a rate of 200 g / m. 2 was applied to the surface of the base material layer 2. The total thickness of the obtained belt material was 1.5 mm, and the weight was 1.6 kg / m 2 The belt material obtained in Reference Example 1 was measured for various physical properties in the same manner as in Example 1. The results are shown in Table 1.

[0048] (Example 2: Base layer + resin layer + surface layer (reactive hot melt resin layer)) A resin composition was prepared by mixing a white pigment with a urethane resin, and a white resin layer 3 was formed by the T-die method on one side of a base layer 2 similar to that of Example 1. A desired mark was printed on the surface of the obtained resin layer 3 by an inkjet printer.

[0049] Next, an isocyanate-based reactive hot melt resin (DIC Corporation, Tyforce H series, containing an isocyanate group as a reactive group, with a melt viscosity of 13.9 mPa·s at 120°C) was applied to one side of a PET film (release film 6) using a roll coater. The side of the release film 6 coated with the hot melt resin 7 and the printed side of the resin layer 3 were laminated together using a hand roll press. After lamination, the laminate was left at room temperature for 10 minutes until the hot melt resin 7 solidified. The release film 6 was then peeled off, and a surface layer 4 made of the hot melt resin 7 was formed on the surface of the printed side of the resin layer 3, thereby obtaining a belt material 1.

[0050] The total thickness of the obtained belt material was 1.6 mm, and the thickness of the surface layer 4 was 0.1 mm. The weight of the belt material was 1.6 kg / m 2 Moreover, various physical properties of the obtained belt material were measured in the same manner as in Example 1. The physical properties are shown in Table 1.

[0051] (Example 3: Base layer + surface layer (non-reactive hot melt resin layer)) The desired marks were printed on the surface of "SBT-2" manufactured by Poval Kogyo Co., Ltd. (a base layer consisting of two layers of polyester woven fabric containing conductive threads, with a total thickness of 1.2 mm, width of 240 mm, and length of 5 m) using an inkjet printer.

[0052] Next, two sheets of non-reactive hot melt resin sheets (hot melt resin sheets made of urethane resin "U85-0.2" manufactured by Poval Kogyo Co., Ltd., thickness 0.2 mm) were stacked together to form the hot melt resin layer, and laminated by heat pressing. The heat pressing was performed for 2 minutes under conditions of a temperature of 110°C and a pressure of 10 kgf / cm. After lamination, the laminate was left at room temperature for 10 minutes until the hot melt resin 7 solidified, thereby obtaining a belt material 1 in which a surface layer 4 made of hot melt resin 7 was formed on the surface of the printed surface of the resin layer 3.

[0053] The total thickness of the obtained belt material was 1.4 mm, and the thickness of the surface layer 4 was 0.2 mm. The weight of the belt material was 1.4 kg / m 2 Moreover, various physical properties of the obtained belt material were measured in the same manner as in Example 1. The physical properties are shown in Table 1.

[0054] (Example 4: Base layer + resin layer + surface layer (non-reactive hot melt resin layer)) A 240 mm wide, 5 m long sheet of "SBTU2020-H" manufactured by Poval Kogyo Co., Ltd. (a substrate layer made of two layers of polyester woven fabric containing conductive yarn, with one resin layer 3 made of urethane resin laminated on top, total thickness 1.5 mm) was prepared. A desired mark was printed on the surface of the resin layer 3 using an inkjet printer.

[0055] Next, a hot melt resin layer made of a non-reactive hot melt resin was formed on the surface of the resin layer 3 in the same manner as in Example 3, thereby obtaining a belt material 1.

[0056] The total thickness of the obtained belt material was 1.8 mm, and the thickness of the surface layer 4 was 0.3 mm. The weight of the belt material was 1.8 kg / m 2 Moreover, various physical properties of the obtained belt material were measured in the same manner as in Example 1. The physical properties are shown in Table 1.

[0057] [Table 1]

[0058] Fig. 3(a) is a photograph of the substrate layer 2 viewed from the front side, and Fig. 3(b) is a photograph of the belt material 1 of Example 2 viewed from the front side (i.e., the surface side on which the transported object is placed). As shown in Fig. 3, it can be seen that the belt material 1 of the present invention, in which the surface layer 4 is formed from a hot melt resin, displays the mark clearly without bleeding. Furthermore, it can be seen that the belt material 1 having the resin layer 3 with concealing properties has the conductive yarn 5 hidden when viewed from the front side of the substrate layer 2.

[0059] Furthermore, it can be seen that the belt material 1 of the present invention having the surface layer 4 formed from a hot melt resin exhibits physical properties equivalent to those of conventional belt materials, and is useful as a conveyor belt. [Explanation of symbols]

[0060] 1 Belt material 2 Base material layer 3 Resin layer 4 Surface layer 5. Conductive thread 6 Release film 7. Hot melt resin

Claims

1. A belt material in which at least a base material layer and a hot melt resin layer containing a reactive hot melt are laminated, It has at least a printed layer, A belt material in which a hot melt resin layer is formed in contact with the printed surface of a printed layer.

2. 2. The belt material according to claim 1, wherein the hot melt resin layer is a urethane resin containing an isocyanate group (excluding silicone-modified polyurethanes containing organosiloxane units).

3. The printed layer is a substrate layer. The belt material according to claim 1 or 2.

4. A resin layer is laminated on one surface of a base material layer, The printed layer is a resin layer. The belt material according to claim 1 or 2.

5. The resin layer has hiding properties, The substrate layer includes conductive yarns. The belt material according to claim 4.

6. The substrate layer is composed of a plurality of layers. The belt material according to any one of claims 1 to 5.

7. A belt conveyor using the belt material according to any one of claims 1 to 6.

8. printing on the surface of the substrate layer; forming a hot melt resin layer containing a reactive hot melt on the printing surface of the base material layer; Including, The step of forming a hot melt resin layer on the printing surface of the base material layer includes: applying a hot melt resin to one side of a release film; a step of laminating the surface of the release film coated with the hot melt resin and the printed surface of the base material layer; peeling the release film from the hot melt resin; A method for manufacturing a belt material, comprising:

9. forming a resin layer on one surface of a substrate layer; printing on the surface of the resin layer; forming a hot melt resin layer containing a reactive hot melt on the printed surface of the resin layer; Including, The step of forming a hot melt resin layer on the printed surface of the resin layer includes: applying a hot melt resin to one side of a release film; a step of laminating the surface of the release film coated with the hot melt resin and the printed surface of the resin layer; peeling the release film from the hot melt resin; A method for manufacturing a belt material, comprising:

Images