JP2010280120A - Mold release sheet, original sheet, method of manufacturing mold release sheet and embossing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold release sheet wherein flattening in use is suppressed. <P>SOLUTION: The mold release sheet 10 includes a substrate 12 and a first resin layer 14 and a second resin layer 16 which includes an ionizing radiation curable resin, and are disposed on both sides of the substrate respectively. In the substrate, an irregular shape is formed on the surface of one side and an irregular shape corresponding to the irregular shape of the surface of the one side is formed on the surface of the other side. The first resin layer 14 and the second resin layer 16 are extended along the irregular shape on the surface of the substrate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a release sheet that has been embossed so that corresponding concave and convex shapes are formed on both sides, and in particular, effectively suppresses flattening of the concave and convex shapes during use. It relates to a release sheet.

  In addition, the present invention relates to the raw material that is embossed so that the corresponding uneven shapes are formed on both sides, and in particular, the flatness of the uneven shapes formed by the embossing is effectively suppressed. Concerning the raw material to be made.

  Furthermore, the present invention relates to a method for producing a release sheet by embossing a raw material so that corresponding uneven shapes are formed on both sides, and in particular, the uneven shape during use. The present invention relates to a method for manufacturing a release sheet in which flattening is effectively suppressed.

  Furthermore, the present invention relates to an embossing system for embossing a raw material so that corresponding concave and convex shapes are formed on both sides, and in particular, flattening of the concave and convex shapes formed by embossing is effective. It is related with the embossing system which comes to be restrained by.

  Nowadays, a release sheet (release paper) used as a mold (pattern paper) for producing sheet-like materials such as synthetic leather products, decorative sheets, and interior materials is known. Patent Document 1 discloses a method for producing a release sheet by embossing an original fabric.

  When the release sheet is produced by embossing, an uneven shape having a large height difference is produced with a small embossing pressure, so that the original sheet made of a sheet is deformed so as to swell as a whole. That is, the embossed original fabric (that is, the release sheet) is formed with uneven shapes corresponding to each other on both sides. In other words, an uneven shape is formed on both sides of the original fabric, and the uneven shape formed on one surface is generally a shape obtained by inverting the undulation of the uneven shape formed on the other surface. When the embossing pressure is low, damage to the raw fabric and the embossing apparatus can be prevented, and embossing can be performed in a short time.

  When producing a sheet-like member such as a synthetic leather product using a release sheet, first, a resin coating liquid having fluidity is applied to one surface of the release paper sheet. Next, a base fabric is laminated on the resin coating solution. After that, by heating the base fabric and the release sheet while pressing each other, the resin coating liquid to which the concavo-convex shape of the release sheet is transferred is cured, and the coating film made of the resin coating liquid is used as the base fabric. Adhere to. Finally, a sheet-like member is obtained by peeling off the sheet-like member composed of the coating film and the base fabric from the release sheet.

  In many cases, the release sheet has a base material made of paper, PET, or the like, and a resin layer laminated on one side of the base material. Then, the resin coating solution described above is applied onto the original resin layer, and the original resin layer has a peelability from the coating film obtained by curing the resin coating solution. is doing.

JP 2002-205311 A

  By the way, in order to reduce manufacturing costs, it is preferable that the release sheet is used repeatedly. However, as described above, the uneven shape of the release sheet is flattened by heat and pressure for curing the resin coating liquid applied on the release sheet and bonding it to the base fabric. In particular, in a release sheet formed by deforming the above-mentioned original fabric so as to be entirely undulated, the flattening of the concavo-convex shape proceeds rapidly from the other surface side not filled with the resin coating liquid. End up.

  When the uneven shape of the release sheet is flattened, the depth of the pattern formed on the sheet-like material such as a synthetic leather product, a decorative sheet, and an interior material becomes shallow. That is, when the uneven shape of the release sheet is flattened, it becomes impossible to transfer the desired uneven shape to the sheet material, and it can no longer be used as a release sheet.

  The present invention has been made in consideration of the above points, and is a release sheet embossed so as to form concavo-convex shapes corresponding to each other on both sides, and is used. It is an object of the present invention to provide a release sheet capable of effectively suppressing the unevenness between the two.

  Further, the present invention is a raw material that is embossed so that the corresponding uneven shapes are formed on both sides, and the unevenness formed by the embossing is effectively suppressed from being flattened. The purpose is to provide a raw material that will become.

  Furthermore, the present invention is a method for producing a release sheet by embossing the original fabric so that the corrugated shapes corresponding to each other are formed on both sides, and the corrugated shape is flat during use. An object of the present invention is to provide a method for producing a release sheet that can effectively suppress the formation.

  Furthermore, the present invention is an embossing system for embossing an original fabric so that the corresponding uneven shapes are formed on both sides, and the uneven shape that effectively suppresses flattening. It is an object to provide an embossing system that can be formed.

  The release sheet according to the present invention is a release sheet that has been embossed, and by the embossing, an uneven shape is formed on the surface on one side, and the surface on the other side is also From the base material in which the concavo-convex shape corresponding to the concavo-convex shape of the surface on the side is formed from an ionizing radiation curable resin, the first resin layer disposed on the one side of the base material, and the ionizing radiation curable resin A second resin layer disposed on the other side of the base material, the first resin layer extending along the irregular shape of the surface of the one side of the base material, The second resin layer is characterized in that it extends so as to follow the irregular shape of the surface on the other side of the base material.

  In the release sheet according to the present invention, the first resin layer forms a surface on one side of the release sheet, and the second resin layer forms a surface on the other side of the release sheet. It may be.

  Further, the release sheet according to the present invention may function as a template for producing a synthetic leather product.

  The raw fabric according to the present invention is a sheet-shaped raw material to be embossed, and is composed of a sheet-like base material and an ionizing radiation curable resin before curing, and is disposed on one side of the base material. And a second resin layer made of an ionizing radiation curable resin before curing and disposed on the other side of the substrate.

  In the original fabric according to the present invention, the first resin layer may form a surface on one side of the original fabric, and the second resin layer may form a surface on the other side of the original fabric. Good.

  Moreover, you may make it the raw material by this invention be a raw material for producing synthetic leather products.

  A method for producing a release sheet according to the present invention is a method for producing a release sheet formed by embossing, wherein an ionizing radiation curable resin is applied to both sides of a sheet-like substrate, and the substrate and A first resin layer disposed on one side of the substrate and made of the ionizing radiation curable resin, and a second resin layer disposed on the other side of the substrate and made of the ionizing radiation curable resin. A step of forming the original fabric, and an uneven shape is formed on the surface of one side of the substrate, and the surface of the other side of the substrate also corresponds to the uneven shape of the surface of one side Embossing the original fabric so as to form an uneven shape, and curing the first resin layer and the second resin layer of the original embossed fabric. It is characterized by.

  In the method of manufacturing a release sheet according to the present invention, in the step of applying the ionizing radiation curable resin to the base material to form the original fabric, one side of the base material and the other side of the base material The ionizing radiation curable resin may be applied to one of the substrates, and then the ionizing radiation curable resin may be applied to the other of the one side of the substrate and the other side of the substrate.

  In the method for producing a release sheet according to the present invention, in the step of curing the first resin layer and the second resin layer, the first resin layer and the second resin layer may be cured simultaneously.

  An embossing system according to the present invention includes an embossing device, an application device disposed on the upstream side of the embossing device, and an ionizing radiation curable resin applied on the downstream side of the embossing device. And a curing device that cures the ionizing radiation curable resin applied in step 1. The coating device applies the ionizing radiation curable resin to both sides of the sheet-like substrate, and the substrate and the substrate. A first resin layer made of the ionizing radiation curable resin disposed on one side of the substrate and a second resin layer made of the ionizing radiation curable resin disposed on the other side of the substrate. The embossing device is embossed with respect to the raw material having the base material, the first resin layer, and the second resin layer, and the surface on one side of the base material has an uneven shape. As it is formed An uneven shape corresponding to the uneven shape of the surface on the one side is formed on the surface on the other side of the base material, and the curing device is the embossed first resin of the original fabric The layer and the second resin layer are cured.

  In the embossing system according to the present invention, the coating device applies a first application member that applies an ionizing radiation curable resin to one side of the substrate, and an ionizing radiation curable resin to the other side of the substrate. And the first application member and the second application member may be arranged at positions shifted along the transport path of the base material.

FIG. 1 is a diagram for explaining an embodiment according to the present invention, and is a diagram showing a method for producing a sheet-like member using a release sheet. FIG. 2 is a schematic view for explaining an apparatus and a method for manufacturing the release sheet of FIG. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2 and shows a base material used for manufacturing a release sheet in a cross section along the normal direction of the sheet surface. It is. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2, showing a cross-section along the normal direction of the sheet surface of the original fabric used for manufacturing the release sheet. It is. FIG. 5 is a cross-sectional view taken along line VV in FIG. 2, and shows the release sheet in a cross section along the normal direction of the sheet surface.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

  1 to 5 are diagrams for explaining an embodiment according to the present invention. Among these, FIG. 1 is a figure for demonstrating the method of producing a sheet-like member using a release sheet. FIG. 2 is a view schematically showing an apparatus and a method for manufacturing the release sheet of FIG.

  First, the release sheet 10 will be described. As shown in FIGS. 1 and 5, the release sheet 10 is disposed on the base 12, the first resin layer 14 disposed on one side of the base 12, and the other side of the base 12. A second resin layer 16. In the example shown in FIG. 1, the first resin layer 14 is laminated on the surface of one side of the substrate 12 (upper side in the paper surface of FIG. 1), and constitutes the surface of one side of the release sheet 10. is doing. Similarly, the 2nd resin layer 16 is laminated | stacked on the surface of the other side (lower side in the paper surface of FIG. 1) of the base material 12, and comprises the surface of the other side of the release sheet 10. FIG. .

  The base material 12 functions as a support base material and is made of, for example, paper or PET. On the other hand, the first resin layer 14 and the second resin layer 16 are formed of an ionizing radiation curable resin, for example, an oligomer type UV curable resin. In the completed release sheet 10, the ionizing radiation curable resin forming the first resin layer 14 and the second resin layer 16 has already been irradiated with the corresponding ionizing radiation and cured. As an example, the thickness of the base material 12 can be 150 to 200 μm, and the thickness of the resin layers 14 and 16 can be 30 to 50 μm.

  As will be described later, the release sheet 10 is produced by embossing an original fabric 20 having a base material 12, a first resin layer 14, and a second resin layer 16. As shown in FIG. 1, the release sheet 10 having a sheet shape is deformed so as to swell. That is, the concavo-convex shape is formed on both surfaces of the release sheet 10, and the concavo-convex shape formed on one surface is generally a shape obtained by inverting the undulation of the concavo-convex shape formed on the other surface at the corresponding position. It has become.

  For this reason, the substrate 12 of the release sheet 10 that has been embossed is also undulated so that the corresponding concave and convex shapes are formed on both sides. In addition, the first resin layer 14 extends along the uneven shape of the surface on one side of the base material 12, so that the surface on one side of the release sheet 10 is on one side of the base material 12. The concavo-convex shape corresponding to the concavo-convex shape formed on the surface is formed. Similarly, the 2nd resin layer 16 is extended so that the uneven | corrugated shape of the surface of the other side of the base material 12 may be followed, and, thereby, the other side of the base material 12 may be on the surface on the other side of the release sheet 10. An uneven shape corresponding to the uneven shape formed on the surface on the side is formed.

  Such a release sheet (release paper) 10 is used as a paper pattern for producing sheet-like members such as vinyl leather and wallpaper. In particular, in the present embodiment, an example will be described in which the produced release sheet 10 functions as a pattern for producing a sheet-like member 30 used as synthetic leather.

  Next, the operation when the sheet-like member (synthetic leather product in the present embodiment) 25 is produced using such a release sheet 10 will be described.

  When producing the sheet-like member 25, first, a resin coating liquid 26 made of a thermosetting resin or the like is applied to one surface of the release sheet 10 formed by the first resin layer 14. Next, as shown in FIG. 1, a base fabric 28 is laminated on the resin coating liquid 26 so that the resin coating liquid 26 is sandwiched between the release sheet 10. At this time, the resin coating liquid 26 positioned between the base fabric 28 and the release sheet 10 is cured while pressing the base fabric 28 toward the release sheet 10 using an appropriate laminator. In the example shown in FIG. 1, the heater cures the resin coating liquid 26 while heating it by a built-in nip roller 29. Thereby, a coating film 27 made of the resin coating liquid 26 is formed. The coating film 27 is bonded to the base fabric 28 by being heated and pressurized. Thereafter, as shown by a two-dot chain line in FIG. 1, the laminate of the coating film 27 and the base cloth 28 is peeled off from the release sheet 10, thereby forming a sheet-like member 25 composed of the coating film 27 and the base cloth 28. Is obtained.

  An uneven shape formed on one surface of the release sheet (release paper) 10 is transferred to the coating film 27 of the obtained sheet-like member 25, and the sheet-like member 25 is formed by the transferred uneven shape. The design is improved.

  When the base fabric 28 and the release sheet 10 are pressed toward each other, the surface on the other side of the release sheet 10 is pressed by, for example, a nip roller as shown in FIG. And in this Embodiment, the release sheet 10 is wavy and the uneven | corrugated shape is formed also in the surface of the other side of the release sheet 10. FIG.

  However, the surface on the other side of the release sheet 10 is formed by the second resin layer 16 made of the ionizing radiation curable resin that has been subjected to the curing treatment, and has higher strength than the base material 12 made of paper or the like. In addition, there is little decrease in strength due to heating. Therefore, when the base fabric 28 and the release sheet 10 are pressed toward each other, even if the surface on the other side of the release sheet 10 is pressed by the nip roller 29 as shown in FIG. The uneven shape formed on the surface on the other side of the mold sheet 10 can be effectively maintained. That is, the release sheet 10 having a surface layer formed of a cured ionizing radiation curable resin exhibits excellent durability against heating and pressurization, and effectively maintains the uneven shape of the surface. be able to. Thereby, the release sheet 10 can be used repeatedly many times, and the manufacturing cost of the sheet-like member can be effectively reduced.

  Next, a method for manufacturing the release sheet 10 will be described mainly with reference to FIGS. First, an embossing system for manufacturing the release sheet 10 will be described with reference to FIG.

  As shown in FIG. 2, the embossing system 30 is disposed on the upstream side of the embossing device 40, on the upstream side of the embossing device 40, and on the downstream side of the embossing device 40. And a curing device 45 that cures the ionizing radiation curable resin applied by the coating device 35. The embossing system 30 further includes a supply device 32 disposed upstream of the coating device 35 and a recovery device 33 disposed downstream of the curing device 45. The supply device 32 supplies the base material 12 toward the coating device 35. Moreover, the collection | recovery apparatus 33 winds up and collects the produced release sheet 10 and collect | recovers it.

  The coating device 35 includes a first application member 36 that applies an ionizing radiation curable resin to one side of the substrate 12, and a second application member 37 that applies an ionizing radiation curable resin to the other side of the substrate 12. ,have. In the present embodiment, the first application member 36 and the second application member 37 are each configured to apply an oligomer-type UV curable resin. Further, the curing device 45 is configured to be able to irradiate both sides of the base material 12 with UV light.

  The embossing device 40 is disposed opposite to the embossing die 41 having an uneven shape corresponding to the uneven shape to be formed on the original fabric 20, and presses the original fabric 20 between the embossing die 41. And a backup body 42 which becomes like this.

  In the illustrated example, the embossing die 41 is configured as a roll-shaped embossing roll. The embossing roll 41 has a roll body that is rotationally driven, and an embossing type surface 41a having an uneven shape is formed on the outer peripheral surface of the roll body. In this Embodiment, the uneven | corrugated shape of the embossing type | mold surface 41a is formed so that a leather pattern can be provided to the raw fabric 20 so that the release sheet 10 for synthetic leather can be produced.

  Moreover, in this Embodiment, the backup body 42 is arrange | positioned facing the embossing roll 41, and is comprised as a backup roll which can rotate synchronizing with the moving speed of the raw fabric 20. As shown in FIG. As shown in FIG. 2, the backup roll 42 sandwiches the raw fabric 20 with the embossing roll 41. In the present embodiment, an uneven shape corresponding to the uneven shape of the embossed mold surface 41 a is also formed on the outer peripheral surface 42 a of the backup roll 42. More specifically, the concavo-convex shape formed complementary to the concavo-convex shape of the embossed mold surface 41a on the outer peripheral surface 42a of the backup roll 42, that is, the concavo-convex shape and the undulation of the embossed mold surface 41a are reversed. An uneven shape is formed. Thereby, it can deform | transform so that the original fabric 20 which passes between between the embossing roll 41 and the backup roll 42 may wave.

  As such a backup roll 41, for example, a paper roll having a surface layer portion formed by pressing and solidifying fibers such as paper and wool can be used. And the uneven | corrugated shape of the outer peripheral surface 42a of the backup roll 42 mentioned above is the embossing roll 41 and the backup roll in the state which pressed the embossing type | mold surface 41 of the embossing roll 41 and the outer peripheral surface 42a of the backup roll 42 toward each other, for example. 42 can be formed by idling.

  An example of a method for producing a release sheet (release paper) 10 by producing an original fabric 20 from the substrate 12 using the embossing system 30 having such a configuration will be described below.

  First, as shown in FIG. 2, the base material 12 is supplied from the supply device 32 and conveyed to the coating device 35. As shown in the sectional view of FIG. 3, the base material 12 fed out from the supply device 32 is flat.

  The coating device 35 includes a first coating member 36 and a second coating member 37 provided along the conveyance path of the base material 12. As shown in FIG. 2, the first application member 36 and the second application member 37 are arranged at a position that passes along the conveyance path of the base material 32. The first application member 36 is disposed at a position facing the surface of one side of the substrate 12 being conveyed, and the second application member 37 is the surface of the other side of the substrate 12 being conveyed. It is arrange | positioned in the position which faces. As a result, the UV curable resin is applied as an ionizing radiation curable resin from the first application member 36 to one side of the substrate 12 being conveyed. Further, the timing of application of the ionizing radiation curable resin to one side of the substrate 12 is shifted, and the UV curable resin from the second application member 37 is changed to the ionizing radiation curable resin on the other side of the substrate 12. Applied. Thus, as shown in FIG. 4, the sheet-like base material 12, the first resin layer 14 made of an ionizing radiation curable resin before curing, disposed on one side of the base material 12, and cured An original fabric 20 made of the previous ionizing radiation curable resin and having the second resin layer 16 disposed on the other side of the substrate 12 is obtained.

  Next, the obtained raw fabric 20 is fed between the embossing roll 41 and the backup roll 42 of the embossing apparatus 40. As described above, not only the embossing mold surface 41a of the embossing roll 41 but also the outer circumferential surface 42a of the backup roll 42 is formed in a concave-convex shape complementary to the concave-convex shape of the embossing mold surface 41a, that is, an embossing mold. A concavo-convex shape in which the concavo-convex shape of the surface 41a and the undulations are reversed is formed. For this reason, the original fabric 20 pressurized between the embossing roll 41 and the backup roll 42 is deformed so as to wave, in other words, to wave. Thereby, not only the uneven shape is formed on the surface layer portion of the raw fabric 20, but also the uneven shape is formed on the surface on one side of the substrate 12, and the surface on the other side of the substrate 12, An uneven shape corresponding to the uneven shape of the surface on one side is formed. According to such a method, an uneven shape having a large height difference can be formed with a low embossing pressure. Since the embossing pressure is low, the load on the embossing device 40 and the raw fabric 20 is small, and embossing at high speed is possible.

  The original fabric 20 (release sheet 10) having the uneven shape is then conveyed to the curing device 45. In the curing device 45, UV light is applied as ionizing radiation to the surface on one side and the surface on the other side of the original fabric 20 (release sheet 10), that is, both the first resin layer 14 and the second resin layer 16. Irradiated. The first resin layer 14 and the second resin layer 16 made of an ionizing radiation curable resin are cured by being irradiated with ionizing radiation. Thereby, the uneven | corrugated shape formed in the embossing process comes to be maintained by the hardened first resin layer 14 and second resin layer 16. As described above, the release sheet 10 shown in FIG. 5 is obtained.

  Note that the stress relaxation time is long for paper, resin, and the like. For this reason, the base material 12 and the resin layers 14 and 16 made of paper, resin, or the like cannot be completely deformed by applying pressure for a short time in embossing. That is, when the pressure in the embossing is released, the original fabric 20 made of paper, resin or the like tries to return to its original flat shape. However, since the curing process by the curing device 45 is quickly performed after the embossing, the restoring deformation of the original fabric 20 (release sheet 10) after releasing the embossing pressure can be effectively restrained. That is, the uneven shape once formed by embossing can be prevented from being flattened and the uneven shape can be maintained.

  According to the present embodiment as described above, an uneven shape is formed on the surface of one side of the substrate 12, and the unevenness of the surface of the one side is also formed on the surface of the other side of the substrate 12. An uneven shape corresponding to the shape is formed. Further, a first resin layer 14 and a second resin portion 16 made of an ionizing radiation curable resin subjected to a curing process are provided on both surfaces of the substrate 12. Each of the first resin layer 14 and the second resin portion 16 extends with a substantially constant thickness along the uneven shape of the surface of the substrate 12. In other words, the release sheet 10 is formed of ionizing radiation curable resin in which concave and convex shapes complementary to each other are formed on both surfaces, and both surface layers are cured. According to such a release sheet 10, the ionization after the curing process having a remarkably strong strength as compared with the paper or the like constituting the surface layer on the back side (the other side) in the conventional release sheet. The second resin layer 16 made of radiation curable resin forms the back surface (the other side) of the release sheet 10. Therefore, it is possible to effectively prevent the release sheet 10 from being flattened from the back surface side (the other side) when the sheet-like member 25 is produced using the release sheet 10.

  Further, the surface (one side) facing the sheet-like member 25 of the release sheet 10 is also formed by the first resin layer 14 made of the ionizing radiation curable resin after the curing treatment. That is, the surface (one side) facing the sheet-like member 25 of the release sheet 10 has high strength and is not softened by heating for curing the resin coating liquid 26. Therefore, flattening from the side (one side) facing the sheet-like member 25 of the release sheet 10 when producing the sheet-like member 25 using the release sheet 10 can also be suppressed.

  In this way, according to the present embodiment, it is possible to extremely effectively prevent the release sheet 10 from being flattened due to heating and pressurization when the sheet-like member 25 is produced.

  Furthermore, the release sheet 10 according to the present embodiment has a symmetric configuration with the base material 12 as the center. That is, the first resin layer 14 and the second resin layer 16 made of ionizing radiation curable resin are disposed on both sides of the base material 12. Moreover, the first resin layer 14 and the second resin layer 16 are wavy in a complementary shape. Therefore, it is possible to very effectively prevent the release sheet 10 from warping (curling). In particular, when an ionizing radiation curable resin is used, polymerization shrinkage occurs during the curing process, which may cause a large warp. According to the present embodiment, while taking advantage of the high strength of the ionizing radiation curable resin, the problem due to the polymerization shrinkage of the ionizing radiation curable resin is solved by the symmetrical configuration of the release sheet 10. can do.

  Various modifications can be made to the above-described embodiment within the scope of the present invention.

  For example, in the above-described embodiment, an example in which a release paper for synthetic leather is manufactured as the release sheet 10 has been described. However, the present invention is not limited to this, and it is a matter of course that the release sheet 10 used for other purposes is manufactured. Is possible.

  In the above-described embodiment, the example in which the first application member 36 and the second application member 37 of the application device 35 are arranged at different positions along the conveyance path of the base material 12 has been described. Not limited. The first application member 36 and the second application member 37 may be arranged at the same position along the conveyance path of the base material 12, and the ionizing radiation curable resin may be applied to both sides of the base material 12 simultaneously.

DESCRIPTION OF SYMBOLS 10 Release sheet 12 Base material 14 1st resin layer 16 2nd resin layer 20 Original fabric 25 Sheet-like member 26 Resin coating liquid 27 Coating film 28 Base cloth 30 Embossing system 32 Feeding device 33 Collecting device 35 Coating device 36 First coating member 37 Second coating member 40 Embossing device 45 Curing device

Claims (11)

An embossed release sheet,
By the embossing, a concavo-convex shape is formed on the surface on one side, and the base material on which the concavo-convex shape corresponding to the concavo-convex shape on the surface on the one side is formed on the surface on the other side,
A first resin layer made of an ionizing radiation curable resin and disposed on the one side of the substrate;
A second resin layer made of an ionizing radiation curable resin and disposed on the other side of the substrate;
The first resin layer extends along the uneven shape of the surface of the one side of the base material,
The release sheet, wherein the second resin layer extends along a concavo-convex shape on the surface of the other side of the base material. The first resin layer forms a surface on one side of the release sheet,
The release sheet according to claim 1, wherein the second resin layer forms a surface on the other side of the release sheet. The release sheet according to claim 1, which functions as a pattern for producing a synthetic leather product. It is a sheet-shaped raw material that is embossed,
A sheet-like substrate;
A first resin layer made of an ionizing radiation curable resin before curing, and disposed on one side of the substrate;
An original fabric comprising an ionizing radiation curable resin before curing, and a second resin layer disposed on the other side of the substrate. The first resin layer forms a surface on one side of the original fabric,
The original fabric according to claim 4, wherein the second resin layer forms a surface on the other side of the original fabric. The raw material according to claim 4 or 5, wherein the raw material is a raw material for producing a synthetic leather product. A method for producing a release sheet formed by embossing,
An ionizing radiation curable resin is applied to both sides of a sheet-like base material, the base material, a first resin layer disposed on one side of the base material and made of the ionizing radiation curable resin, and the base material A second resin layer disposed on the other side of the ionizing radiation curable resin and forming an original fabric,
As the concavo-convex shape is formed on the surface of one side of the substrate, and the concavo-convex shape corresponding to the concavo-convex shape of the surface of the one side is also formed on the surface of the other side of the substrate, Embossing the original fabric;
And a step of curing the first resin layer and the second resin layer of the original fabric subjected to embossing. In the step of applying the ionizing radiation curable resin to the base material to form the original fabric, the ionizing radiation curable resin is applied to one of the one side of the base material and the other side of the base material. Then, an ionizing radiation curable resin is applied to the other of the one side of the base and the other side of the base, and the method for producing a release sheet according to claim 7 . The release sheet according to claim 7 or 8, wherein in the step of curing the first resin layer and the second resin layer, the first resin layer and the second resin layer are cured simultaneously. Production method. Embossing equipment,
An applicator disposed on the upstream side of the embossing device and applying an ionizing radiation curable resin;
A curing device disposed on the downstream side of the embossing device and curing the ionizing radiation curable resin applied by the coating device,
The coating device applies an ionizing radiation curable resin to both sides of a sheet-like base material, and the first resin layer is formed of the ionizing radiation curable resin disposed on one side of the base material. And a second resin layer disposed on the other side of the base material and made of the ionizing radiation curable resin,
The embossing device embosses the raw material having the base material, the first resin layer, and the second resin layer, and an uneven shape is formed on the surface of one side of the base material. In addition, an uneven shape corresponding to the uneven shape of the surface on one side is formed on the surface on the other side of the base material,
The said hardening apparatus hardens the said 1st resin layer and said 2nd resin layer of the raw material which gave embossing, The embossing system characterized by the above-mentioned. The coating apparatus includes: a first coating member that coats an ionizing radiation curable resin on one side of the substrate; and a second coating member that coats an ionizing radiation curable resin on the other side of the substrate. Have
The embossing system according to claim 10, wherein the first application member and the second application member are arranged at positions shifted along a conveyance path of the base material.

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