Synthetic leather and manufacturing method

Abstract

To improve the flexibility and feel of polyvinyl chloride-based synthetic leather without compromising its abrasion resistance. [Solution] Polyvinyl chloride synthetic leather with improved flexibility and tactile feel without compromising abrasion resistance. The synthetic leather includes a resin layer 2, a fabric layer 4, and an adhesive layer 3 that bonds the resin layer 2 and the fabric layer 4. The resin layer 2 has a main body 5 containing polyvinyl chloride resin as a main component, and a surface portion 6 containing polycarbonate-based urethane resin and silicone resin and having polycarbonate-based urethane resin or silicone resin as a main component. The main body 5 is in contact with the adhesive layer 3 on one side and with the surface portion 6 on the other side.

Description

[Technical field]

[0001] The present invention relates to an artificial leather and a method for producing the artificial leather. [Background technology]

[0002] Synthetic leather is widely used for automobile seats and the like. A typical synthetic leather includes a base fabric layer containing a fabric and a resin layer containing a resin material, and the resin material constituting the resin layer is typically a polyvinyl chloride resin or a polyurethane resin. When a polyvinyl chloride resin is used, it is advantageous in terms of cost due to the difference in raw material cost compared to when a polyurethane resin is used, but the problem is that it is inferior in mechanical properties such as abrasion resistance. In conventional polyvinyl chloride-based synthetic leather, it is common to provide a thicker resin layer than polyurethane-based synthetic leather to compensate for the disadvantages in mechanical properties, but it was sometimes difficult to satisfy all of the various performances such as mechanical properties, weight, flexibility, touch, and texture.

[0003] In view of the above problems, various techniques have been considered for forming a part of a resin layer in polyvinyl chloride-based synthetic leather as a foam layer. For example, JP 2020-180191 A (Patent Document 1) discloses a foamed resin layer containing a polyvinyl chloride-based resin and a thermoplastic polyurethane elastomer, and synthetic leather containing the foamed resin layer. According to the technology of Patent Document 1, a synthetic leather that is lightweight and has excellent abrasion resistance can be provided. In addition, JP 2017-210703 A (Patent Document 2) discloses a synthetic leather having a foamed resin layer containing a vinyl chloride resin and a plasticizer and a resin layer containing polyurethane. According to the technology of Patent Document 2, a synthetic leather that has excellent abrasion resistance and is less likely to wrinkle can be provided. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-180191 A (or US Patent Application Publication No. 2020 / 0340175 A) [Patent Document 2] JP 2017-210703 A (or China Patent Application Publication No. 107435248 A) Summary of the Invention [Problem to be solved by the invention]

[0005] However, the techniques of Patent Documents 1 and 2 merely improve the structure on the premise of providing a foamed resin layer, and the improvement effects are limited. In particular, the flexibility and touch did not reach a level comparable to polyurethane synthetic leather.

[0006] Thus, there is a demand for improving the softness and feel of polyvinyl chloride-based synthetic leather without impairing its abrasion resistance. [Means for solving the problem]

[0007] The synthetic leather according to the present invention includes a resin layer, a fabric layer including a material, and an adhesive layer that bonds the resin layer and the fabric layer, the resin layer having a main body portion including a polyvinyl chloride resin as a main component, and a surface portion including a polycarbonate-based urethane resin and a silicone resin, the main body portion being in contact with the adhesive layer on one side and in contact with the surface portion on the other side. The resin layer has a basis weight of 160 g / m 2 More than 300g / m 2 and the resin layer is shaped by adsorbing the surface portion to the outer peripheral surface of a support having an uneven outer peripheral surface and a negative pressure on the inside. It is characterized by:

[0008] The manufacturing method according to the present invention is a method for manufacturing a sling bag comprising: a resin layer; a fabric layer including a material; and an adhesive layer that bonds the resin layer and the fabric layer; the resin layer having a main body portion including a polyvinyl chloride resin as a main component; and a surface portion including a polycarbonate-based urethane resin and a silicone resin, the surface portion being mainly composed of the polycarbonate-based urethane resin or the silicone resin. The resin layer has a basis weight of 160 g / m 2 More than 300g / m 2 Is less than or equal toA method for producing synthetic leather, comprising the steps of: forming the main body; forming the adhesive layer on one side of the main body; adhering the base fabric layer to the adhesive layer; and forming the surface portion on the other side of the main body. A step of adsorbing the surface portion onto an outer peripheral surface of a support having an uneven outer peripheral surface and a negative pressure on the inside to form the resin layer; The present invention is characterized by comprising:

[0009] In these structures, instead of the foamed resin layer or the like used in conventional polyvinyl chloride synthetic leathers to ensure abrasion resistance, the surface portion contains polycarbonate urethane resin and silicone resin, making it easier to make the resin layer thinner, and improving the flexibility and feel of the synthetic leather without compromising abrasion resistance. In addition, the texture is less likely to show when the resin layer is shaped, making it easier to add decoration as intended.

[0010] Preferred embodiments of the present invention will be described below. However, the scope of the present invention is not limited to the preferred embodiments described below.

[0011] In one embodiment of the synthetic leather according to the present invention, the fabric has a basis weight of 150 g / m 2 More than 300g / m 2 It is preferable that:

[0012] In this structure, a thicker fabric is used than the fabric generally used for the base fabric layer in conventional polyvinyl chloride-based synthetic leather, which tends to improve the feel of the synthetic leather.

[0013] In one embodiment of the synthetic leather according to the present invention, the fabric is preferably brushed.

[0014] This configuration makes it easier to improve the cushioning properties of the synthetic leather.

[0017] Further features and advantages of the present invention will become more apparent from the following description of exemplary and non-limiting embodiments, which are given with reference to the drawings. [Brief description of the drawings]

[0018] [Figure 1] 1 is a schematic cross-sectional view showing a structure of a synthetic leather according to an embodiment. [Diagram 2] 1A to 1C are schematic diagrams showing a shaping device used in a manufacturing method according to an embodiment and a method of using the same. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described with reference to the accompanying drawings, in which the present invention is applied to a synthetic leather 1 and a method for producing the same.

[0020] [Composition of synthetic leather] The synthetic leather 1 according to this embodiment includes a resin layer 2, an adhesive layer 3, and a base fabric layer 4, and the resin layer 2 has a main body portion 5 and a surface portion 6 (FIG. 1). The main body portion 5 is in contact with the adhesive layer 3 on one side, and in contact with the surface portion 6 on the other side. The synthetic leather 1 is used, for example, for automobile seats, and the surface of the resin layer 2 is decorated with projections and recesses. Note that FIG. 1 is a schematic diagram of the layer structure of the synthetic leather 1, and the thickness ratios of the various portions in FIG. 1 are not accurate. Also, the projections and recesses on the surface of the resin layer 2 are not shown in FIG. 1.

[0021] Of the resin layer 2, the main body 5 contains polyvinyl chloride resin as a main component. Here, the main component refers to a material that occupies the largest weight ratio among the materials constituting the main body 5. The main body 5 is also generally called a skin layer in the field of synthetic leather. The polyvinyl chloride resin contained in the main body 5 may have a degree of polymerization of 1300 or more and 2500 or less, for example.

[0022] Of the resin layer 2, the surface portion 6 is a portion called a surface treatment layer, and contains a polycarbonate-based urethane resin and a silicone resin. The surface portion 6 is mainly composed of a polycarbonate-based urethane resin or a silicone resin. Here, the main component refers to the material that occupies the largest weight ratio among the materials that constitute the surface portion 6. The surface portion 6 is also generally called a surface treatment layer in the field of synthetic leather. It is not prohibited that the surface portion 6 contains components other than the polycarbonate-based urethane resin and the silicone resin. Non-limiting examples of such other components include a crosslinking agent and a leveling material.

[0023] The polycarbonate-based urethane resin contained in the surface portion 6 is not particularly limited. For example, the surface portion 6 can be formed using a commercially available surface treatment agent containing a polycarbonate-based urethane resin sold by Stahl, Dainichiseika Color & Chemicals Mfg. Co., Ltd., Seiko Kasei Co., Ltd., etc. The content of the polycarbonate-based urethane resin in the surface portion 6 is, for example, 10 g / m 2 More than 30g / m 2 The following is an example, but is not limited to this. The surface portion 6 may contain multiple types of polycarbonate-based urethane resin. In this case, the content of the polycarbonate-based urethane resin is specified as the total content of the multiple types of polycarbonate-based urethane resin.

[0024] A polycarbonate-based urethane resin is a polymer obtained by reacting, for example, a polyol compound containing a polycarbonate block with an isocyanate compound. The physical properties of a polycarbonate-based urethane resin are determined by factors such as the number of polymerizations of the polycarbonate block, the number of isocyanate groups of the isocyanate compound, and the molecular structure. For example, the larger the number of polymerizations of the polycarbonate block, the smaller the proportion of urethane bonds in the polymer chain of the polycarbonate-based urethane resin. At this time, hydrogen bonds (involving urethane bonds) between polymer chains are less likely to occur, so a relatively soft polycarbonate-based urethane resin is obtained. On the other hand, when the number of polymerizations of the polycarbonate block is small, a relatively hard polycarbonate-based urethane resin is obtained. Also, when the number of isocyanate groups of the isocyanate compound is 2, the polymer chain of the polycarbonate-based urethane resin becomes linear, and a relatively soft polycarbonate-based urethane resin is obtained. On the other hand, when the number of isocyanate groups of the isocyanate compound is 3 or more, the polymer chain of the polycarbonate-based urethane resin becomes a mesh-like structure, and a relatively hard polycarbonate-based urethane resin is obtained. In this way, the physical properties of the polycarbonate-based urethane resin can be appropriately controlled by selecting the polyol compound and the isocyanate compound. By utilizing this, the physical properties of the surface portion 6 can be controlled.

[0025] The silicone resin contained in the surface portion 6 is not particularly limited. Therefore, for the formation of the surface portion 6, a commercially available silicone resin-containing surface treatment agent sold by, for example, Nissin Chemical Industry Co., Ltd., Stahl, Seiko Chemical Co., Ltd., etc. can be used. The surface portion 6 (surface treatment layer) containing a polycarbonate-based urethane resin and a silicone resin can be formed by, for example, applying a commercially available surface treatment agent containing a polycarbonate-based urethane resin and a commercially available surface treatment agent containing a silicone resin. The surface portion 6 may contain multiple types of silicone resin. In this case, the content of the silicone resin is specified as the total content of the multiple types of silicone resin.

[0026] The silicone resin may be modified or unmodified. When the silicone resin is modified, that is, when the silicone resin is a modified silicone resin, it may be, but is not limited to, an amino-modified silicone resin, a dimethyl-modified silicone resin, a carbinol-modified silicone resin, or the like.

[0027] The composition of the surface portion 6 is not limited as long as it is mainly composed of polycarbonate-based urethane resin or silicone resin. Incidentally, "mainly composed of polycarbonate-based urethane resin or silicone resin" includes the case where both polycarbonate-based urethane resin and silicone resin are the materials that make up the surface portion 6 in the largest weight ratio (i.e., the content of polycarbonate-based urethane resin and the content of silicone resin are the same and are greater than the content of other components). For example, when the surface portion 6 is mainly composed of polycarbonate-based urethane resin, the surface portion 6 may contain 1 part by mass or less and 15 parts by mass or less of silicone resin per 100 parts by mass of polycarbonate-based urethane resin.

[0028] The weight of the resin layer 2 is not particularly limited, but is, for example, 160 g / m 2 More than 300g / m 2 The surface portion 6 may have a thickness of, for example, 10 g / m 2 More than 30g / m 2 and the main body portion 5 may be the remainder thereof.

[0029] The adhesive layer 3 may contain an adhesive commonly used in the field of synthetic leather. An example of such an adhesive is an adhesive containing polyvinyl chloride resin. In this case, the polyvinyl chloride resin may have a degree of polymerization of, for example, 1000 or more and 1700 or less. The weight of the adhesive layer 3 is not particularly limited, but may be, for example, 65 g / m 2 More than 180g / m 2 It could be the following:

[0030] The fabric layer 4 includes a fabric, which may be, for example, but is not limited to, a woven fabric, a single jersey, a double jersey, a tricot, a raschel, a double raschel, a nonwoven fabric, and the like.

[0031] The fabric included in the base fabric layer 4 has a basis weight of 150 g / m 2 More than 300g / m 2 It is preferable that the fabric weight is 150 g / m or less. 2 If the synthetic leather 1 has a weight per unit area of ​​300 g / m or more, the feel (cushioning, etc.) of the synthetic leather 1 tends to be good. 2 If it is equal to or less than this range, the bending resistance of the synthetic leather 1 tends to be in a range suitable for use in automobile seats.

[0032] The fabric contained in the fabric layer 4 is preferably brushed. In this case, it is preferable because it is easy to increase the cushioning properties of the synthetic leather. In addition, the color of the fabric contained in the fabric layer 4 is not limited, but it is preferable to use the same color or a similar color as the resin layer 2 (main body portion 5) because the fabric layer 4 is less noticeable in perforations, etc.

[0033] [Method of manufacturing synthetic leather] Next, a method for producing the synthetic leather 1 according to this embodiment will be described. In the method for producing the synthetic leather 1 according to this embodiment, the production process of the synthetic leather 1 is carried out in three stages: a first stage, a second stage, and a third stage.

[0034] In the first stage, a first semi-finished product is produced, which is composed of a main body 5, an adhesive layer 3, and a base fabric layer 4. The first semi-finished product is produced by stacking the main body 5, the adhesive layer 3, and the base fabric layer 4 in that order on top of a release paper, and finally removing the release paper.

[0035] First, a process of forming the main body 5 is carried out. Specifically, polyvinyl chloride resin is applied and dried to the release paper sent out from a release paper supply source (for example, in a roll form), and the main body 5 is formed on the release paper. Next, a process of forming an adhesive layer 3 on one side of the main body 5 is carried out. Specifically, adhesive is applied to the main body 5 formed on the release paper. Then, a process of adhering the base fabric layer 4 to the adhesive layer 3 is carried out. Specifically, the base fabric layer 4 is attached to the main body 5 formed on the release paper and the adhesive layer 3. Through the process up to this point, a first semi-finished product with release paper is obtained. Finally, the release paper is peeled off from the main body 5 of the first semi-finished product, and the release paper and the first semi-finished product are separately collected. The manner in which the release paper and the first semi-finished product are collected is not limited, but considering ease of use in the next process, it is preferable that they are collected in a form wound up in a roll.

[0036] In the second stage, the body portion 5 of the first semi-finished product is surface-treated to form the surface portion 6, thereby producing a second semi-finished product consisting of the resin layer 2 (surface portion 6 and body portion 5), the adhesive layer 3, and the fabric layer 4. That is, a step of forming a surface portion on the other side of the body portion 5 is carried out. Specifically, a surface treatment agent containing a polycarbonate-based urethane resin and a silicone resin is applied to the first semi-finished product sent out from a supply source of the first semi-finished product (for example, in a roll form), and then dried, so that the surface portion 6 is formed on the body portion 5.

[0037] In the third stage, a concave-convex pattern is formed on the resin layer 2 of the second semi-finished product to decorate it. That is, a process of shaping the resin layer 2 is carried out. The shaping device 10 used in this process has a heater 11 for heating the second semi-finished product 20, a ceramic roll 12 (an example of a support), and a pressure reducing device (not shown) for creating a negative pressure inside the roll 12 (FIG. 2). Note that FIG. 2 is a schematic diagram of the configuration of the shaping device 10, and the dimensional ratios of the various parts are not accurate.

[0038] Since the roll 12 is made of ceramics and has voids through which air can pass, negative pressure is applied to suck air from the outside to the inside of the roll 12. On the outer peripheral surface of the roll 12, irregularities 13 corresponding to the pattern to be transferred to the resin layer 2 are formed.

[0039] The second semi-finished product 20 is heated by the heater 11 and then introduced into the roll 12. This heating is intended to soften the vinyl chloride resin of the resin layer 2 to make it easier to be shaped. In the roll 12, the resin layer 2 of the second semi-finished product 20 is adsorbed onto the outer peripheral surface of the roll 12 using the negative pressure from the pressure reducing device as a driving force. At this time, the unevenness 13 on the outer peripheral surface of the roll 12 is transferred to the resin layer 2, and the resin layer 2 is shaped.

[0040] By shaping the resin layer 2 using negative pressure as a driving force, the texture of the fabric layer 4 is less likely to appear on the surface of the resin layer 2, making it easier to add decoration as intended. The problem of the texture of the fabric layer 4 appearing on the surface of the resin layer 2 is likely to occur when the resin layer 2 is thin (when the weight of the resin layer 2 is small). On the other hand, if the contact force between the roll and the resin layer 2 is reduced to avoid the problem of the texture of the fabric layer 4 appearing on the surface of the resin layer 2, there is a risk that the intended decoration will not be obtained. Therefore, when the resin layer 2 is thin, it is difficult to determine shaping conditions that prevent the texture of the fabric layer 4 from appearing and allow sufficient decoration to be added. When a method using negative pressure as a driving force is adopted as a shaping method for the resin layer 2, it is easier to avoid the texture from appearing and add sufficient decoration at the same time, compared to a method using a method of pressing the synthetic leather 1 against a roll. Therefore, when the weight of the resin layer 2 is relatively small, a method using negative pressure as a driving force is particularly advantageous as a shaping method for the resin layer 2 compared to a method of pressing the synthetic leather 1 against a roll. In the synthetic leather 1 according to this embodiment, the weight of the resin layer 2 is 160 g / m 2 More than 300g / m 2However, the preferred range of this basis weight is in a region smaller than the weight of a typical resin layer in a conventional polyvinyl chloride-based synthetic leather. That is, since the weight of the resin layer 2 in the preferred embodiment of the synthetic leather 1 according to the present embodiment is smaller than the weight of the resin layer in a conventional polyvinyl chloride-based synthetic leather, it is advantageous to shape the resin layer 2 by a method using negative pressure as a driving force.

[0041] Other embodiments Finally, other embodiments of the synthetic leather and the manufacturing method according to the present invention will be described. Note that the configurations disclosed in the following embodiments can be applied in combination with the configurations disclosed in other embodiments, as long as no contradiction occurs.

[0042] In the above embodiment, the synthetic leather 1 including the resin layer 2, the adhesive layer 3, and the fabric layer 4 has been described as an example. However, in the synthetic leather according to the present invention, the presence of other layers is not excluded as long as the resin layer and the fabric layer are bonded together by the adhesive layer. Similarly, the presence of other parts is not excluded as long as the resin layer has a main body portion including a polyvinyl chloride resin and a surface portion including a polycarbonate-based urethane resin and a silicone resin.

[0043] In the above embodiment, the configuration in which the resin layer 2 is shaped using a ceramic roll 12 has been described as an example. However, in the manufacturing method according to the present invention, the step of shaping the resin layer may or may not be included. The method of shaping the resin layer is not limited to the above configuration. For example, a method of forming a main body on embossed release paper and transferring the unevenness of the release paper to the main body, or a method of pressing the main body against a roll made of a material other than ceramics (such as iron) and transferring the unevenness of the roll can be adopted. Note that when the unevenness of the release paper is transferred to the main body, the third step of the manufacturing method according to the above embodiment can be omitted.

[0044] Among these methods, when using a roll (regardless of material), a desired pattern can be formed on the resin layer 2 by installing a roll having projections and recesses corresponding to the desired pattern in equipment available to the user. In contrast, when using release paper, the patterns that can be formed on the resin layer 2 are limited to the range that can be selected from commercially available release papers unless the release paper is manufactured in equipment available to the user. Since it is not common for a business that manufactures synthetic leather 1 to manufacture release paper, the use of a roll has the advantage that the degree of freedom of shaping is higher than that of the use of release paper, and the design can be easily changed. Therefore, in a preferred embodiment of the synthetic leather 1 according to this embodiment, shaping the resin layer 2 by a method using negative pressure as a driving force is particularly advantageous in that it is possible to achieve both the addition of the intended decoration and the degree of freedom of decoration.

[0045] Regarding other configurations, it should be understood that the embodiments disclosed in this specification are illustrative in all respects and that the scope of the present invention is not limited thereto. A person skilled in the art would easily understand that appropriate modifications are possible without departing from the spirit of the present invention. Therefore, other embodiments modified without departing from the spirit of the present invention are naturally included in the scope of the present invention. EXAMPLES

[0046] The present invention will be further described below with reference to examples, but the following examples are not intended to limit the invention.

[0047] [Production of test pieces] Working Example , reference example, The manufacturing method of the synthetic resin of each example of the present invention and the comparative example will be described. Note that, unless otherwise specified, the above embodiment will be followed.

[0048] Example 1 The resin layer is made of polyvinyl chloride resin and has a basis weight of 300g / m 2 The base fabric layer is made of double jersey fabric with a basis weight of 250 g / m 2The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of a first silicone resin, and 3 parts by mass of a second silicone resin (referred to as "PC,Si" in Table 1). The first silicone resin was a dimethyl-modified silicone resin, and the second silicone resin was an amino-modified silicone resin, which is the same in the following examples and comparative examples. The fabric of the base fabric layer was a black, non-brushed fabric. The resin layer was shaped by adsorbing it onto a ceramic roll (referred to as "adsorption" in Table 1).

[0049] ( Reference example 1 ) The resin layer is made of polyvinyl chloride resin and has a basis weight of 300g / m 2 The base fabric layer is a single jersey fabric with a basis weight of 150 g / m 2 The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of the first silicone resin, and 3 parts by mass of the second silicone resin. The fabric of the base fabric layer was a white, unbrushed fabric. The resin layer was shaped by transferring the unevenness of the release paper to the main body (referred to as "release paper" in Table 1).

[0050] ( Reference example 2 ) The resin layer is made of polyvinyl chloride resin and has a basis weight of 300g / m 2 The base fabric layer is a single jersey fabric with a basis weight of 150 g / m 2 The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of the first silicone resin, and 3 parts by mass of the second silicone resin. The fabric of the base fabric layer was unbrushed and white. The resin layer was shaped by a method of transferring the unevenness of an iron roll to the main body (listed as "iron" in Table 1), and the pressing force when pressing the synthetic leather against the iron roll was adjusted within a range in which the texture of the base fabric layer did not appear on the surface of the resin layer.

[0051] Example 2 ) The resin layer is made of polyvinyl chloride resin and has a basis weight of 300g / m 2The base fabric layer is a double jersey fabric with a basis weight of 300 g / m 2 The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of the first silicone resin, and 3 parts by mass of the second silicone resin. The fabric of the base fabric layer was a black brushed fabric. The resin layer was shaped by adsorbing it onto a ceramic roll.

[0052] Example 3 ) The resin layer is made of polyvinyl chloride resin and has a basis weight of 300g / m 2 The base fabric layer is a single-woven fabric with a basis weight of 200 g / m 2 The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of the first silicone resin, and 3 parts by mass of the second silicone resin. The fabric of the base fabric layer was a white brushed fabric. The resin layer was shaped by adsorbing it onto a ceramic roll.

[0053] Comparative Example 1 This is an example of a conventional polyvinyl chloride synthetic leather. The resin layer is made of polyvinyl chloride resin and has a basis weight of 600 g / m. 2 The base fabric layer is a single-woven fabric with a basis weight of 150 g / m 2 The resin layer was configured to have a surface layer, a main body, and an intermediate layer made of foamed polyvinyl chloride resin, with the intermediate layer being in contact with the adhesive layer. The surface was formed using a surface treatment agent containing polyurethane resin (listed as "PU" in Table 1). The base fabric layer was made of white, unbrushed fabric. The resin layer was shaped by transferring the unevenness of the release paper to the main body.

[0054] Comparative Example 2 The synthetic leather of Comparative Example 2 was obtained in the same manner as Comparative Example 1, except that the resin layer was shaped by transferring the unevenness of an iron roll to the main body. The pressing force when pressing the synthetic leather against the iron roll was adjusted within a range in which the texture of the base fabric layer did not appear on the surface of the resin layer.

[0055] Comparative Example 3 This is an example of conventional polyvinyl chloride synthetic leather without an intermediate layer. The resin layer is made of polyvinyl chloride resin and has a basis weight of 300 g / m 2 The base fabric layer is a single-woven fabric with a basis weight of 150 g / m 2 The surface was formed using a surface treatment agent containing polyurethane resin. The fabric of the base fabric layer was white and not brushed. The resin layer was formed by adsorbing it onto a ceramic roll.

[0056] Comparative Example 4 This is an example of a conventional polyvinyl chloride synthetic leather with a modified surface treatment method. The resin layer is made of polyvinyl chloride resin and the basis weight is 600g / m 2 The base fabric layer is a single-woven fabric with a basis weight of 150 g / m 2 The surface was formed using a surface treatment agent containing 100 parts by mass of polycarbonate-based urethane resin, 9 parts by mass of the first silicone resin, and 3 parts by mass of the second silicone resin. The fabric of the base fabric layer was a white fabric that was not brushed. The resin layer was shaped by adsorbing it onto a ceramic roll.

[0057] Comparative Example 5 This is an example of a conventional polyurethane synthetic leather. The resin layer is made of polyurethane resin and the basis weight is 150g / m. 2 The base fabric layer is a double jersey fabric with a basis weight of 300 g / m 2 The surface was formed using a surface treatment agent containing polyurethane resin. The fabric of the base fabric layer was a black brushed fabric. The resin layer was shaped by transferring the unevenness of the release paper to the main body.

[0058] Comparative Example 6 This is an example of a conventional polyurethane-based synthetic leather. The resin layer is made of polyurethane resin and the basis weight is 100 g / m. 2 The base fabric layer is a tricot fabric with a basis weight of 200 g / m 2The surface was formed using a surface treatment agent containing polyurethane resin. The fabric of the base fabric layer was a black one that was not brushed. The resin layer was shaped by transferring the unevenness of the release paper to the main body.

[0059] [Evaluation of test specimens] (Bending hardness test) Working Example , reference example, A bending hardness test was performed by sensory evaluation for each of the examples of the comparative examples. A test piece measuring 22 cm x 17 cm was prepared for each example, placed on a desk with the surface portion 6 facing up, and the tester placed his / her hand on the test piece. With the thumb spread and the other four fingers closed, the palm was removed from the test piece while the fingertips were in contact with the test piece, and then the test piece was gripped. The bending hardness of the test piece was evaluated based on the resistance felt by the palm and fingers. Comparative Example 6 (conventional polyurethane synthetic leather) was used as the standard for the highest evaluation of "A" and Comparative Example 2 (conventional polyvinyl chloride synthetic leather) was used as the standard for the lowest evaluation of "E", and the bending hardness of the test piece was selected from five levels A to E according to the subjective opinion of the tester.

[0060] (Slipperiness test) Working Example , reference example, A sensory evaluation of the slipperiness was carried out for each of the examples of the and comparative examples. A test piece measuring 22 cm x 17 cm was prepared for each example, and placed on a platform balance with the surface portion 6 facing up, and the tester's index, middle, and ring fingertips (beyond the first joint) were brought into contact with the test piece. The test piece was pressed with the three fingers, and the fingertips were moved back and forth while keeping the reading on the platform balance at 300 g. The slipperiness of the test piece was evaluated based on the resistance felt at the fingertips at this time. Comparative Example 6 (conventional polyurethane synthetic leather) was used as the standard for the highest evaluation of "A", and Comparative Example 2 (conventional polyvinyl chloride synthetic leather) was used as the standard for the lowest evaluation of "E", and the tester's subjective selection of the slipperiness of the test piece was made from five levels of A to E.

[0061] (Indentation test) Working Example , reference example,A sensory evaluation of the indentation property was carried out for each of the examples of the and comparative examples. A test piece measuring 22 cm x 17 cm was prepared for each example, placed on a desk with the surface portion 6 facing up, and pressed by the tester's index finger. The indentation property of the test piece was evaluated based on the rebound feeling felt at the fingertip. Comparative Example 5 (a conventional polyurethane synthetic leather with a raised base fabric layer 4) was used as the standard for the highest evaluation of "A" and Comparative Example 1 (a conventional polyvinyl chloride synthetic leather) was used as the standard for the lowest evaluation of "E", and the indentation property of the test piece was subjectively selected from five levels A to E by the tester.

[0062] (Visual inspection) Working Example , reference example, Each of the examples and the comparative examples was visually observed to confirm the state of the pattern on the surface. The state of the pattern on each example was evaluated on a two-level scale of A or E as follows. A: The pattern can be seen even when observed from a distance of 30 cm or more from the test piece. E: The pattern can only be seen when approaching within 30 cm of the test piece.

[0063] (Bending resistance test) Working Example , reference example, For each of the examples of the comparative example and the comparative example, a bending test was performed based on JIS L 1096:2020 (Bending resistance test method A (45° cantilever method)). The numerical values ​​of the test results for each example are shown in Table 1.

[0064] (Wear resistance test) Working Example , reference example, For each of the examples of the and comparative examples, an abrasion resistance test was conducted in accordance with JASO M403-88 (friction strength method B). However, the load was changed to 3 kg. The number of abrasions until damage was observed on the surface of the test piece was recorded as the test result for each example. For test pieces that did not show damage when the number of abrasions reached 28,000, the test was terminated at that point. The numerical values ​​of the test results for each example are shown in Table 1.

[0065] (KES test) Working Example , reference example,For each of the examples and comparative examples, a bending hardness test and a bending recovery test were performed using KES-FB2-A. The test results for each example are shown in Table 1.

[0066] 〔result〕 Working Example , reference example, The evaluation results of each example and comparative example are shown in Table 1. As shown in Table 1, 3 and Reference Examples 1 and 2 In comparison with the conventional polyvinyl chloride synthetic leathers of Comparative Examples 1 and 2, synthetic leathers with high abrasion resistance, flexibility and a good feel were obtained. Examples 1 to 5 are comparable in abrasion resistance and slipperiness to Comparative Examples 5 and 6, which are polyurethane synthetic leathers. In addition, Examples 1 to 5 using brushed fabrics 2 and 3 In the case of Comparative Examples 5 and 6, the indentation properties were comparable to those of Comparative Examples 5 and 6.

[0067] Table 1: Examples , reference example, and comparative examples [Table 1] [Industrial Applicability]

[0068] The invention may be used, for example, in car seats. [Explanation of symbols]

[0069] 1: Synthetic leather 2: Resin layer 3: Adhesive layer 4: Base fabric layer 5: Main body 6: Surface part 10:Excipient device 11: Heater 12: Roll 13: Unevenness 20:Second semi-finished product

Claims

1. The present invention includes a resin layer, a fabric layer including a material, and an adhesive layer that bonds the resin layer and the fabric layer, the resin layer has a main body portion containing polyvinyl chloride resin as a main component, and a surface portion containing a polycarbonate-based urethane resin and a silicone resin and containing the polycarbonate-based urethane resin or the silicone resin as a main component; the main body portion is in contact with the adhesive layer on one side and in contact with the surface portion on the other side; The resin layer has a basis weight of 160 g / m 2 or more and 300 g / m 2 or less, The synthetic leather is one in which the resin layer is shaped by adsorbing the surface portion onto the outer peripheral surface of a support having an uneven outer peripheral surface and a negative pressure on the inside.

2. The fabric has a basis weight of 150 g / m ２ More than 300g / m ２ 2. The synthetic leather according to claim 1, wherein:

3. 3. The synthetic leather according to claim 1, wherein the fabric is brushed.

4. The present invention includes a resin layer, a fabric layer including a material, and an adhesive layer that bonds the resin layer and the fabric layer, the resin layer has a main body portion containing polyvinyl chloride resin as a main component, and a surface portion containing a polycarbonate-based urethane resin and a silicone resin and containing the polycarbonate-based urethane resin or the silicone resin as a main component; A method for producing a synthetic leather, wherein the resin layer has a basis weight of 160 g / m 2 or more and 300 g / m 2 or less, forming the body portion; forming the adhesive layer on one surface side of the main body; bonding the fabric layer to the adhesive layer; forming the surface portion on the other side of the main body portion; and a step of adsorbing the surface portion onto the outer peripheral surface of a support having an uneven outer peripheral surface and a negative pressure on the inside, thereby shaping the resin layer.

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