JP2015123656A - Shape retaining sheet and method of producing shape retaining sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shape retaining sheet that can be deformed easily and can be used repeatedly.SOLUTION: This invention provides a shape retaining sheet 1 that is deformed into a predetermined shape and can hold the shape, the shape retaining sheet 1 having a metal layer 2, a first elastic body layer 3 comprising a first rubber-like elastic body around the metal layer 2, and a second elastic body layer 4 comprising a second rubber-like elastic body with higher hardness than that of the first rubber-like elastic body and covering the periphery of the first elastic body layer 3.

Description

  The present invention relates to a shape-holding sheet that can be deformed and can hold the shape in a deformed state, and a method for manufacturing the shape-holding sheet.

  Conventionally, rubber-like elastic bodies such as silicone rubber have been used in various applications such as to protect products and the like or to prevent contact with dangerous substances.

  As an application for preventing contact with a dangerous substance, for example, a protective sheet used for protecting an object surface from impact, contamination, and the like is known (for example, see Patent Document 1). This protective sheet is a soft rubber sheet or a sheet formed by embedding a soft wire net between soft synthetic resin sheets.

Japanese Utility Model Publication No. 05-21044

  For example, in the protective sheet described in Patent Document 1, when the shape is deformed and repeatedly used, there is a problem that the wire mesh in the protective sheet is broken and cannot be used. Further, there is a problem that the wire rod with the broken wire net is exposed to the outside of the protective sheet. Generally, it is required that such a protective sheet can be used repeatedly for a longer time. Moreover, the sheet | seat which can be used not only for a protection sheet but for various uses is requested | required.

  The present invention has been made in view of the above problems, and an object thereof is to provide a shape-retaining sheet that can be easily deformed and is suitable for repeated use.

  In order to achieve the above object, a shape-holding sheet according to an embodiment of the present invention is a shape-holding sheet that can be deformed into a predetermined shape and hold the shape, and includes a metal layer and a periphery of the metal layer A second elastic layer formed of a first rubber-like elastic body and a second rubber-like elastic body having a higher hardness than the first rubber-like elastic body and covering the periphery of the first elastic body layer. And a body layer.

  In the shape maintaining sheet according to another embodiment, the first elastic body layer is further configured around the metal layer on which the surface treatment is performed.

  In the shape-retaining sheet according to another embodiment, the surface treatment is a treatment of applying a primer around the metal layer.

  In the shape-retaining sheet according to another embodiment, the first rubber-like elastic body is further cured by removing the liquid first rubber-like elastic body material from the storage container in a predetermined storage container. It is constituted by.

  The shape-retaining sheet according to another embodiment is a porous metal plate in which a metal layer is further formed with a plurality of holes communicating with the outside.

  In the shape maintaining sheet according to another embodiment, the diameter of the hole is 1 μm or more and 100 μm or less.

  In the shape-retaining sheet according to another embodiment, the first rubber-like elastic body further enters at least a part of the holes of the porous metal plate.

  The shape-retaining sheet according to another embodiment is a metal plate in which the metal layer is further punched.

  In the shape-retaining sheet according to another embodiment, the first rubber-like elastic body and the second rubber-like elastic body are silicone rubber.

  In addition, a method for manufacturing a shape-holding sheet according to another embodiment of the present invention is a method for manufacturing a shape-holding sheet that is deformed into a predetermined shape and can hold the shape, and includes a metal layer. A first elastic layer forming step of forming a first elastic layer composed of the first rubber-like elastic body around the first elastic layer, and a second hardness higher than that of the first rubber-like elastic body around the first elastic layer. A second elastic layer forming step of forming a second elastic layer composed of a rubber-like elastic body.

  The method for manufacturing a shape-retaining sheet according to another embodiment further includes a surface treatment step of performing a surface treatment on the metal layer, and in the first elastic body layer forming step, the surface of the metal layer subjected to the surface treatment is provided around the surface treatment step. A first elastic layer composed of a first rubber-like elastic body is formed.

  In the first elastic body layer forming step, the manufacturing method of the shape maintaining sheet according to another embodiment further applies a liquid material that becomes the first rubber-like elastic body when cured, around the metal layer, The first elastic layer is formed by curing the material.

  According to the present invention, it is possible to provide a shape maintaining sheet that can be easily deformed and is suitable for repeated use.

FIG. 1 is a cross-sectional view of the shape maintaining sheet according to the first embodiment. FIG. 2 is a cross-sectional view of the shape maintaining sheet according to the second embodiment. FIG. 3 is a cross-sectional view of a shape maintaining sheet according to the third embodiment. FIG. 4 is a cross-sectional view of a shape maintaining sheet according to the fourth embodiment. FIG. 5 is a first photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 6 is a second photograph showing a specific example of the shape maintaining sheet according to the first embodiment. FIG. 7 is a third photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 8 is a fourth photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 9 is a fifth photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 10 is a sixth photograph showing a specific example of the shape-retaining sheet according to the first embodiment.

  Embodiments of the present invention will be described with reference to the drawings. The embodiments described below do not limit the invention according to the scope of claims, and all the elements and combinations described in the embodiments are essential for the solution of the invention. Not always.

<First Embodiment>
First, the shape maintenance sheet | seat which concerns on the 1st Embodiment of this invention is demonstrated.

  FIG. 1 is a cross-sectional view of a shape-retaining sheet according to the first embodiment of the present invention.

  The shape-retaining sheet 1 according to the first embodiment includes a metal layer 2, a first elastic layer 3 formed around the metal layer 2, and a second provided around the first elastic layer 3. And an elastic layer 4. For example, the shape maintaining sheet 1 preferably has a thickness of about 0.2 mm to 3 mm. In the present embodiment, the thickness of the shape maintaining sheet 1 is 2 mm, for example.

  The metal layer 2 is a flat metal plate in a state where the shape maintaining sheet 1 is not deformed (hereinafter referred to as an initial state). In the present embodiment, for example, it is a tin plate (SN-443382 manufactured by Nicola Corporation) having a purity of 99.9%. The dimensions of the tin plate are, for example, a thickness of 0.2 mm, a length of 200 mm, and a width of 200 mm. In addition, a dimension is not restricted to this, It is good also as arbitrary dimensions according to the use application of the shape maintenance sheet | seat 1. FIG. The metal layer 2 is not limited to tin, and may be aluminum, copper, nickel, SUS, or any of these alloys.

  The first elastic body layer 3 is formed so as to cover the entire periphery of the metal layer 2. The thickness of the first elastic layer 3 may be, for example, 0.05 mm or more and 5 mm or less. The first elastic body layer 3 includes a rubber-like elastic body (first rubber-like elastic body). The first rubber-like elastic body contains an adhesive component to a metal and has a relatively flexible property (durometer type A hardness according to the measurement method of JISK6253, for example, 10 to 55). It can be deformed following the deformation. The first rubber-like elastic body is a thermosetting elastomer such as urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber or styrene butadiene rubber; urethane type, ester type, styrene type, olefin type, butadiene type Or it is suitably comprised from thermoplastic elastomers, such as a fluorine type; or those composites, etc., and is comprised especially suitably with silicone rubber.

  In the present embodiment, the first elastic body layer 3 is composed of a silicone rubber composition that has strong adhesion to the metal layer 2. As a silicone rubber composition, there exists a silicone rubber composition containing 0.5 mass part or more and 3.0 mass parts or less of epoxy-type silane coupling agents with respect to 100 mass parts of thermosetting organopolysiloxane compositions, for example. If necessary, the adhesive property may be further improved by adding 0.1 part by mass or more and 2.5 parts by mass or less of an epoxy-based adhesion aid to the silicone rubber composition.

  Examples of the heat-curable organopolysiloxane composition contained in the silicone rubber composition constituting the first elastic layer 3 include, for example, a millable silicone rubber compound (product numbers manufactured by Shin-Etsu Chemical Co., Ltd .: KE-153U, HG- 070U, HG-060U, etc.), but is not necessarily limited thereto.

  The epoxy-based adhesion assistant contained in the silicone rubber composition constituting the first elastic body layer 3 has an epoxy equivalent of 100 g / mol to 5000 g / mol, an aromatic ring, and a Si—H group in the molecule. An organic compound or an organosilicon compound containing at least one of each is preferable, and specific examples include X-93-3046 manufactured by Shin-Etsu Chemical Co., Ltd., but are not necessarily limited thereto.

  The epoxy-based silane coupling agent contained in the silicone rubber composition constituting the first elastic body layer 3 has two different reactive groups in the molecule, one of the reactive groups being an epoxy group and the other being a methoxy group. The organic silicon monomer is preferably KBM-403 manufactured by Shin-Etsu Chemical Co., Ltd., TSL8350 manufactured by Momentive Performance Materials Japan GK, Toray Dow Corning Silicone Co., Ltd. SH6040 made by the company etc. is mentioned, However, it is not necessarily limited to this.

  Since the first elastic body layer 3 is made of a silicone rubber composition having strong adhesion to metal, it is relatively firmly bonded to the metal layer 2. Therefore, even when the metal layer 2 is deformed, the first elastic body layer 3 is hardly peeled off from the metal layer 2. For this reason, even when the metal layer 2 is bent, it is possible to appropriately prevent stress from being concentrated on a part of the metal layer 2 and bending the metal layer 2 at an acute angle. It is possible to appropriately prevent a situation in which the metal of the metal layer 2 is broken by being repeatedly bent or repeatedly bent.

  The second elastic body layer 4 is formed so as to cover the entire periphery of the first elastic body layer 3. The thickness of the second elastic body layer 4 may be, for example, not less than 0.1 mm and not more than 10 mm. The second elastic layer 4 includes a rubber-like elastic body (second rubber-like elastic body) having flexibility but having a higher hardness than the first rubber-like elastic body constituting the first elastic body layer 3. Has been. The second rubber-like elastic body has, for example, a durometer type A hardness of 40 or more and 85 or less according to the measurement method of JISK6253. The second rubber-like elastic body is a thermosetting elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber or styrene butadiene rubber; urethane, ester, styrene, olefin It is preferably composed of a thermoplastic elastomer such as butadiene-based or fluorine-based; or a composite thereof, and is particularly preferably composed of silicone rubber.

  In the present embodiment, for example, silicone rubber KE-9610U (durometer type A hardness 60) manufactured by Shin-Etsu Chemical Co., Ltd. is used as the second rubber-like elastic body.

  Since the second elastic layer 4 has a higher hardness than the first elastic layer 3, the tack property is reduced and the sliding property is improved as compared with the case where the first elastic layer 3 is exposed to the outside. It is possible to improve the touch feeling and to prevent the adhesion of dirt.

  According to this shape maintaining sheet, the second elastic body layer 4 having a high hardness is exposed to the outside, and the first elastic body layer 3 having a low hardness is provided inside, so that it is necessary for the outside. As a whole, it can be deformed relatively easily by hand while maintaining its properties.

  Next, the manufacturing method of the shape maintenance sheet | seat which concerns on 1st Embodiment is demonstrated.

  First, the metal layer 2 is prepared. Next, the uncured silicone rubber composition having high adhesiveness with the metal layer 2 is dispensed on the surface of a release sheet (not shown) such as a fluororesin film so as to have a predetermined thickness, and such a silicone rubber composition. Prepare two release sheets to which is attached. Next, the release sheet to which the silicone rubber composition is adhered is superimposed on the upper and lower surfaces of the prepared metal layer 2 so that the silicone rubber composition is on the metal layer 2 side. Next, the member on which the release sheet with the silicone rubber composition attached is placed in a predetermined mold, and the mold is pressurized for a predetermined time (for example, 1 minute to 10 minutes). A primary crosslinking step is performed in which the rubber is cured by heating at a predetermined temperature (for example, 100 ° C. or more and 150 ° C. or less) (primary crosslinking step of the first elastic layer forming step). Next, the release sheets on both sides of the member are peeled off, and the silicone rubber composition is subjected to a predetermined time (for example, 60 minutes to 180 minutes) and a predetermined temperature (for example, 180 ° C. to 250 ° C.) with a dryer. A secondary cross-linking step is performed to develop the adhesion of the product to the metal (second cross-linking step of the first elastic layer forming step). As a result, the first elastic body layer 3 is formed on the entire surface around the metal layer 2. The first elastic layer 3 is in a state of being relatively firmly bonded to the metal layer 2.

  Next, the second rubber-like elastic material (second rubber-like elastic material) constituting the second elastic layer 4 is made to have a predetermined thickness on the surface of a release sheet (not shown) such as a fluororesin film. The two release sheets with the second rubber-like elastic material attached thereto are prepared. Next, the release sheet to which the second rubber-like elastic material is attached is arranged so that the second rubber-like elastic material becomes the first elastic layer 3 side on the upper and lower surfaces of the member on which the first elastic layer 3 is formed. To overlay. Next, the member on which the release sheet to which the second rubber-like elastic material is attached is placed in a predetermined mold, and the mold is held for a predetermined time (for example, 1 minute to 10 minutes). A primary crosslinking step is performed in which the rubber is cured by applying pressure and heating at a predetermined temperature (for example, 100 ° C. or more and 150 ° C. or less) (primary crosslinking step of the second elastic layer forming step). Next, the release sheets on both sides of the member are peeled off, and the second elasticity is obtained under the conditions of a predetermined time (for example, 60 minutes to 180 minutes) and a predetermined temperature (for example, 180 ° C. to 250 ° C.) with a dryer. A secondary crosslinking step is performed so as to improve the adhesion of the body layer 4 to the first elastic layer 3 (secondary crosslinking step of the second elastic layer forming step). Thereby, the 2nd elastic body layer 4 is integrally formed around the 1st elastic body layer 3, and the shape maintenance sheet | seat 1 which concerns on 1st Embodiment is manufactured.

  In addition, about the manufacturing method of the shape maintenance sheet | seat which concerns on 1st Embodiment, it can also be performed as follows. That is, the metal layer 2 is prepared. Next, the uncured silicone rubber composition having high adhesiveness with the metal layer 2 is dispensed on the surface of a release sheet (not shown) such as a fluororesin film so as to have a predetermined thickness, and such a silicone rubber composition. Prepare two release sheets to which is attached. Next, the release sheet to which the silicone rubber composition is adhered is superimposed on the upper and lower surfaces of the prepared metal layer 2 so that the silicone rubber composition is on the metal layer 2 side. Next, a protective film (not shown) such as polyethylene having a predetermined thickness is placed on both sides of the member on which the release sheet having the silicone rubber composition adhered is overlapped, and the film is pressed and sealed through a pinch roll (not shown). The thickness of the member is set to a predetermined thickness.

  Next, the protective film is peeled off from the member, and the rubber is cured by drying at a predetermined time (for example, 1 minute to 10 minutes) and a predetermined temperature (for example, 100 ° C. to 150 ° C.) in a dryer. A primary crosslinking step is performed (primary crosslinking step of the first elastic layer forming step). Next, the release sheets on both sides of the member are peeled off, and the silicone rubber composition is subjected to a predetermined time (for example, 60 minutes to 180 minutes) and a predetermined temperature (for example, 180 ° C. to 250 ° C.) with a dryer. A secondary cross-linking step for developing the adhesion of the product to the metal is performed (secondary cross-linking step of the first elastic layer forming step). As a result, the first elastic body layer 3 is formed on the entire surface around the metal layer 2. The first elastic layer 3 is in a state of being relatively firmly bonded to the metal layer 2.

  The second rubber-like elastic material (second rubber-like elastic material) constituting the second elastic body layer 4 is distributed on the surface of a release sheet (not shown) such as a fluororesin film so as to have a predetermined thickness. Two release sheets with the second rubber-like elastic material attached thereto are prepared. Next, the release sheet to which the second rubber-like elastic material is attached is arranged so that the second rubber-like elastic material becomes the first elastic layer 3 side on the upper and lower surfaces of the member on which the first elastic layer 3 is formed. To overlay. Next, a protective film (not shown) such as polyethylene having a predetermined thickness is placed on both surfaces of the member on which the release sheet with the second rubber-like elastic material attached is overlapped, and is pressed and adhered through a pinch roll. Thus, the thickness of the member is set to a predetermined thickness.

  Next, the protective film is peeled off from the member, and the rubber is cured by drying at a predetermined time (for example, 1 minute to 10 minutes) and a predetermined temperature (for example, 100 ° C. to 150 ° C.) in a dryer. A primary crosslinking step is performed (primary crosslinking step of the second elastic layer forming step). Next, the release sheets on both sides of the member are peeled off, and the second elasticity is obtained under the conditions of a predetermined time (for example, 60 minutes to 180 minutes) and a predetermined temperature (for example, 180 ° C. to 250 ° C.) with a dryer. A secondary crosslinking step is performed so as to improve the adhesion of the body layer 4 to the first elastic layer 3 (secondary crosslinking step of the second elastic layer forming step). Thereby, the 2nd elastic body layer 4 is integrally formed around the 1st elastic body layer 3, and the shape maintenance sheet | seat 1 which concerns on 1st Embodiment is manufactured. The first rubber-like elastic body and the second rubber-like elastic body are made of similar materials (for example, silicone rubbers), so that both the surface treatment such as primer application to the first elastic body layer 3 is not added. Can be firmly bonded and integrated.

<Second Embodiment>
Next, a shape maintaining sheet according to the second embodiment of the present invention will be described. In addition, about the component which is common in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  FIG. 2 is a cross-sectional view of a shape retaining sheet according to the second embodiment of the present invention.

  The shape-retaining sheet 1 according to the second embodiment includes a metal layer 2, a primer layer 5 applied around the metal layer 2, and a first elastic body bonded through the metal layer 2 and the primer layer 5. It has the layer 6 and the 2nd elastic body layer 4 provided in the circumference | surroundings of the 1st elastic body layer 6. FIG. For example, the shape maintaining sheet 1 preferably has a thickness of about 0.2 mm to 3 mm. In the present embodiment, the thickness of the shape maintaining sheet 1 is 2 mm, for example.

  The primer layer 5 is formed on the entire surface around the metal layer 2 with a primer that improves the adhesion between the metal layer 2 and the first elastic body layer 6. The primer constituting the primer layer 3 may be any component as long as it is a primer that enhances the adhesion to the first elastic layer 6. As such a primer, for example, primer C manufactured by Shin-Etsu Chemical Co., Ltd. may be used.

  The first elastic layer 6 is formed so as to cover the entire periphery of the primer layer 5. The thickness of the first elastic layer 6 may be, for example, 0.05 mm or more and 5 mm or less. The first elastic body layer 6 includes a rubber-like elastic body (first rubber-like elastic body). The first rubber-like elastic body is relatively flexible (durometer type A hardness according to the measurement method of JISK6253, for example, 10 or more and 55 or less), and can be deformed following the deformation of the metal layer 1. is there. The first rubber-like elastic body is a thermosetting elastomer such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber or styrene butadiene rubber; urethane type, ester type, styrene type, olefin type It is preferably composed of a thermoplastic elastomer such as butadiene-based or fluorine-based; or a composite thereof, and is particularly preferably composed of silicone rubber.

  In the present embodiment, the first elastic layer 6 is a liquid in a predetermined container, and is made of a rubber-like elastic material that becomes a first rubber-like elastic body by curing at room temperature when taken out from the container. It is formed using. As such a rubber-like elastic material, for example, a one-component condensation type RTV rubber KE-45 manufactured by Shin-Etsu Chemical Co., Ltd. is used. When this rubber-like elastic material is cured, it becomes a rubber-like elastic body having a durometer type A hardness of 30.

  Since the first elastic layer 6 is bonded to the metal layer 2 via the primer layer 5, it is bonded to the metal layer 2 relatively firmly. Therefore, even when the metal layer 2 is deformed, the first elastic body layer 6 is hardly peeled off from the metal layer 2. For this reason, even when the metal layer 2 is bent, it is possible to appropriately prevent stress from being concentrated on a part of the metal layer 2 and bending the metal layer 2 at an acute angle. It is possible to appropriately prevent a situation in which the metal of the metal layer 2 is broken by being repeatedly bent or repeatedly bent.

  According to this shape maintaining sheet, the second elastic body layer 4 having a high hardness is exposed to the outside, and the first elastic body layer 6 having a low hardness is provided inside, so that it is necessary for the outside. As a whole, it can be deformed relatively easily by hand while maintaining its properties.

  Next, the manufacturing method of the shape maintenance sheet | seat which concerns on 2nd Embodiment is demonstrated.

  First, the metal layer 2 is prepared, a primer is applied to the entire surface around the metal layer 2, and left at room temperature for 30 minutes, for example (surface treatment step). As a result, the primer layer 5 is formed on the entire surface around the metal layer 2.

  Next, a liquid first rubber-like elastic material is applied to the entire surface of the primer layer 5 and left at room temperature for 2 hours, for example (first elastic layer forming step). Thereby, the first elastic body layer 6 is formed on the entire surface around the primer layer 5. Since the first elastic layer 6 is bonded to the metal layer 2 via the primer layer 5, the first elastic layer 6 is bonded to the metal layer 2 relatively firmly.

  Next, around the formed first elastic layer 5, a second rubber-like elastic body (for example, silicone rubber KE-9710U manufactured by Shin-Etsu Chemical Co., Ltd. (durometer type A hardness) 70) and placed in a predetermined mold, pressurizing the mold for a predetermined time (for example, 5 minutes) and heating it at a predetermined temperature (for example, 170 ° C.) (second elastic layer formation) Step) Thereby, the second elastic body layer 4 is integrally formed around the first elastic body layer 6.

  Next, the reaction residue adhering to the shape maintaining sheet 1 on which the second elastic layer 4 is formed is removed and heat treatment is performed (heat treatment step). For example, the shape maintaining sheet 1 is heat-treated at 150 ° C. for 60 minutes with a hot air circulating dryer. Thereby, the adhesiveness between each layer in the shape maintenance sheet 1 improves more.

  In this way, the shape maintaining sheet 1 according to the second embodiment is manufactured.

<Third Embodiment>
Next, a shape maintaining sheet according to the third embodiment will be described. In addition, about the component which is common in 1st Embodiment and 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  FIG. 3 is a cross-sectional view of a shape maintaining sheet according to the third embodiment. In FIG. 3, for convenience, the primer layer 5 is shown so as to completely cover the entire outer surface of the porous metal plate 7 with a certain thickness. On the other hand, since the primer is applied, the primer layer 5 is not necessarily formed with a constant thickness with respect to the outside of the outer shape, and partly communicates with the hole inside the porous metal plate 7. There may be parts.

  The shape maintaining sheet 1 according to the third embodiment uses a porous metal plate 7 in which a plurality of holes communicating with the outside are formed as the metal layer 2 in the shape maintaining sheet 1 according to the second embodiment. It is what I did.

  The porous metal plate 7 has a flat plate shape in the initial state. In the present embodiment, the porous metal plate 7 is a porous metal plate made of nickel, for example. The diameter of the hole formed in the porous metal plate 7 may be, for example, 1 μm or more and 100 μm or less. For example, the porous metal plate 7 has a thickness of 0.2 mm, a length of 200 mm, and a width of 200 mm. In addition, a dimension is not restricted to this, It is good also as arbitrary dimensions according to the use application of the shape maintenance sheet | seat 1. FIG. Further, the porous metal plate 7 is not limited to nickel, and may be a porous metal plate made of a metal such as aluminum, copper, SUS, or an alloy thereof.

  In the present embodiment, since the holes inside the porous metal plate 7 communicate with the outside (outside the porous metal plate 7), the first rubber-like elastic body enters the porous material. By curing, the first rubber-like elastic body and the porous metal plate 7 are integrated by physical engagement. When the first rubber-like elastic body is in a liquid state, it is easy to enter the porous body, so that the physical fitting force is improved. When the primer constituting the primer layer 5 is applied, the primer is also applied to the surface of at least a part of the holes of the porous metal plate 7. Therefore, the porous metal plate 7 and the rubber-like elastic body are bonded more firmly in the holes of the porous metal plate 7.

  Further, when the first rubber-like elastic material constituting the first elastic body layer 6 is disposed around the porous metal plate 7 in a liquid state, at least a part of the inside of the porous metal plate 7 is used. The first rubber-like elastic material enters the hole, and as a result, the first rubber-like elastic body is formed in at least some of the holes. Therefore, when the primer is also applied to the surface of the hole of the porous metal plate 7, the porous metal plate 7 and the first rubber-like elastic body are firmly bonded also in the hole of the porous metal plate 7. Accordingly, the porous metal plate 7 and the first elastic body layer 6 can be bonded more firmly. For this reason, even when the porous metal plate 7 is bent, the stress is concentrated on a part of the porous metal plate 7 because the first elastic body layer 6 follows in a state of being bonded to the porous metal plate 7. Thus, it is possible to appropriately prevent the metal plate 7 from being bent at an acute angle, and to appropriately prevent the porous metal plate 7 from being easily returned to the original state or being broken by being repeatedly bent.

  Next, the manufacturing method of the shape maintenance sheet | seat which concerns on 3rd Embodiment is demonstrated.

  First, a porous metal plate 7 is prepared, a primer is applied from the entire surface around the porous metal plate 7, and left at room temperature for 30 minutes, for example (surface treatment step). Here, the primer also flows into at least a part of the holes communicating with the outside of the porous metal plate 7, and the primer is also applied to the surface of the holes. It is preferable that the primer flows into more holes of the porous metal plate 7.

  Next, a liquid first rubber-like elastic material is applied from the entire periphery of the primer layer 5 and left at room temperature for 2 hours, for example (first elastic layer forming step). Here, the first rubber-like elastic material flows also into at least a part of the holes communicating with the outside of the porous metal plate 7, and the holes are filled with the first rubber-like elastic material. . Here, it is preferable that more holes of the porous metal plate 7 are filled with the first rubber-like elastic material. Thereby, the first elastic body layer 6 is formed on the entire surface around the primer layer 5. Further, since the first rubber-like elastic body is bonded to the porous metal plate 7 through the primer also in the holes inside the porous metal plate 7, the porous metal plate 7, the first elastic body layer 6, Will be more firmly bonded. Thus, since the 1st rubber-like elastic body which covers the surface of the porous metal plate 7 is connected through the hole formed in the porous metal plate 7, the primer is not applied to the porous metal plate 7 temporarily. Even if there is a portion that cannot be applied, the first rubber-like elastic body can be kept in close contact with the porous metal plate 7, and does not lift from the porous metal plate 7.

  Next, the periphery of the formed first elastic body layer 6 is covered with a second rubber-like elastic body that is a material of the second elastic body layer 4, and is placed in a predetermined mold, and is then disposed for a predetermined time (for example, 5 minutes). ) And pressurizing the mold only at a predetermined temperature (for example, 170 ° C.) (second elastic layer forming step). As a result, the second elastic layer 4 is integrally formed around the first elastic layer 6.

  Next, the reaction residue adhering to the shape maintaining sheet 1 on which the second elastic layer 4 is formed is removed and heat treatment is performed (heat treatment step). For example, the shape maintaining sheet 1 is heat-treated at 150 ° C. for 60 minutes with a hot air circulating dryer. Thereby, the adhesiveness between each layer in the shape maintenance sheet 1 improves more.

  In this way, the shape maintaining sheet 1 according to the third embodiment is manufactured. According to this shape maintaining sheet 1, not only the periphery of the porous metal plate 7 is bonded to the first elastic body layer 6 via the primer layer 5, but also the first inside the pores in the porous metal plate 7. Since the rubber-like elastic body is bonded to the porous metal plate 7 via the primer, the porous metal plate 7 and the first elastic body layer 6 are bonded more firmly. Therefore, when the porous metal plate 7 is bent, the first elastic body layer 6 follows in a state where the first elastic body layer 6 is bonded to the porous metal plate 7, so that stress is concentrated on a part of the porous metal plate 7. Therefore, it is possible to appropriately prevent the porous metal plate 7 from being bent at an acute angle, and to prevent the porous metal plate 7 from being easily returned to the original state or being repeatedly bent and broken.

<Fourth embodiment>
Next, a shape maintaining sheet according to the fourth embodiment will be described. In addition, about the component which is common in 1st Embodiment to 3rd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  FIG. 4 is a cross-sectional view of a shape maintaining sheet according to the fourth embodiment. In FIG. 4, for the sake of convenience, the primer layer 5 is shown so as to completely cover the entire outer surface of the outer shape of the porous metal plate 7 with a certain thickness. On the other hand, since the primer is applied, the primer layer 5 is not necessarily formed with a constant thickness with respect to the outside of the outer shape, and partly communicates with the hole inside the porous metal plate 7. There may be parts.

  The shape-retaining sheet 1 according to the fourth embodiment includes a metal layer 7, a primer layer 5 applied around the metal layer 7, and a first elastic body bonded via the metal layer 7 and the primer layer 5. It has a layer 8 and a second elastic layer 9 provided around the first elastic layer 8.

  The first elastic body layer 8 is composed of a first rubber-like elastic body having a higher hardness than the second elastic body layer 9. Examples of the first rubber-like elastic body include, but are not limited to, silicone rubber KE-9710U (durometer type A hardness 70) manufactured by Shin-Etsu Chemical Co., Ltd. The second elastic layer 9 is in a liquid state in a predetermined container, and is formed using a rubber-like elastic material that is cured at room temperature when taken out from the container and becomes a second rubber-like elastic body. . As such a rubbery elastic material, for example, a one-component condensation type RTV rubber KE-45 manufactured by Shin-Etsu Chemical Co., Ltd. is used. When this rubber-like elastic material is cured, it becomes a rubber-like elastic body having a durometer type A hardness of 30.

  Next, the manufacturing method of the shape maintenance sheet | seat which concerns on 4th Embodiment is demonstrated.

  First, a porous metal plate 7 is prepared, a primer is applied from the entire surface around the porous metal plate 7, and left at room temperature for 30 minutes, for example (surface treatment step). Here, the primer also flows into at least a part of the holes communicating with the outside of the porous metal plate 7, and the primer is also applied to the surface of the holes. It is preferable that the primer flows into more holes of the porous metal plate 7.

  Next, uncured silicone rubber (silicone rubber KE-9710U (durometer type A hardness 70) manufactured by Shin-Etsu Chemical Co., Ltd.) is dispensed to a thickness of 1.5 mm, and each of both surfaces of the porous metal plate 7 is separated. And is placed in a predetermined mold, and the mold is pressurized for a predetermined time (for example, 5 minutes) and heated at a predetermined temperature (for example, 120 ° C.) (first elastic layer forming step). As a result, a sheet having a thickness of 3 mm in which the first elastic layer 8 is formed around the porous metal plate 7 is formed.

  Next, the one-component condensation type RTV rubber KE-45 is applied to the entire surface of the sheet so as to have a thickness of 0.5 mm and dried at room temperature. Thereby, the 4 mm-thick shape holding sheet 1 in which the second elastic layer 9 is formed on the entire surface of the first elastic layer 8 is formed.

  Thereby, a moist touch can be secured, the shape can be easily deformed, and the shape-retaining sheet 1 having a sufficient thickness can be obtained.

  Next, a specific example of the shape maintaining sheet according to the first embodiment will be described. In the following specific example, the shape-retaining sheet according to the first embodiment will be described, but the shape-retaining sheet according to any of the second to fourth embodiments is substantially the same.

  FIG. 5 is a first photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 6 is a second photograph showing a specific example of the shape maintaining sheet according to the first embodiment. FIG. 7 is a third photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 8 is a fourth photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 9 is a fifth photograph showing a specific example of the shape-retaining sheet according to the first embodiment. FIG. 10 is a sixth photograph showing a specific example of the shape-retaining sheet according to the first embodiment. Note that the shape-retaining sheet shown in FIGS. 9 and 10 is different from the shape-retaining sheet shown in FIGS. 5 to 8 only with the pigment added to the second elastic layer in order to make it easy to grasp the shape by photographs. It is different.

  The shape maintaining sheet 1 according to the first embodiment has a flat plate shape as shown in FIG. 5 immediately after the shape maintaining sheet 1 is manufactured. In FIG. 5, the upper surface of the shape-retaining sheet 1 is a textured surface with a textured surface, and the lower surface is a polished surface with a polished surface. The shape-retaining sheet 1 deformed as shown in FIGS. 6 to 10 can be easily returned to the state shown in FIG.

  As shown in FIG. 6, the shape-retaining sheet 1 can be easily deformed into a half-folded shape by being bent at a substantially central portion of the shape-retaining sheet 1 shown in FIG. 5. In the shape-retaining sheet 1 shown in FIG. 6, the surface that is bent to the outside is a textured surface, and the surface that is on the inside is a glossy surface.

  Further, as shown in FIGS. 7 and 8, the shape maintaining sheet 1 can be easily deformed by bending the vicinity of the four corners of the shape maintaining sheet 1 upward. In this state, the difference in height between the highest part and the lowest part of the shape maintaining sheet 1 is, for example, 5 cm or more. In the shape maintaining sheet 1 shown in FIGS. 7 and 8, the upper surface is a textured surface, and the lower surface is a glossy surface. The shape-holding sheet 1 having this shape can be used, for example, as a tray for storing small items or sweets.

  Further, as shown in FIG. 9, the shape maintaining sheet 1 can be made to stand by being rounded into a cylindrical shape so that one side becomes the center side. In the shape maintaining sheet 1, a surface facing the center of the cylinder is a textured surface, and a surface facing the outside of the cylinder is a glossy surface. For example, the shape-holding sheet 1 having this shape can be placed inside a cylinder with a long sheet such as a flower or chopsticks.

  Further, as shown in FIG. 10, the shape maintaining sheet 1 can be rounded so that one corner is on the center side. In the shape maintaining sheet 1 having this shape, the surface facing the center is a textured surface, and the surface facing the outside is a glossy surface. The shape-holding sheet 1 is not limited to the shape shown in FIGS. 5 to 10 and can be easily deformed any number of times as desired by the user.

<Other embodiments>

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and can be applied to various other modes.

  For example, in the first to third embodiments, the second rubber-like elastic body has higher hardness than the first rubber-like elastic body, thereby preventing stickiness and improving the touch feeling. Can be expected. In the first to third embodiments, the second rubber-like elastic body may have a lower hardness than the first rubber-like elastic body depending on the use of the shape-retaining sheet. If it does in this way, hardening, such as slip prevention, can be expected. In the first to fourth embodiments, the surface treatment of the second elastic layer may be made different between one surface and the other surface of the second elastic layer. For example, at least part of one surface of the second elastic body layer may be subjected to graining, and at least part of the other surface may be subjected to polishing (for example, resin coating). For example, the surface subjected to the graining process has an effect that dust is hardly attached, whereas the surface subjected to the polishing process has an effect of preventing slippage between the surface and the object in contact with the surface.

  Moreover, in the said 2nd Embodiment, although the process which apply | coats a primer was performed as surface treatment of the metal layer 2, this invention is not restricted to this, For example, a flame is radiated with respect to the metal layer 2. Treatment (flame treatment) or UV treatment of irradiating the metal layer 2 with ultraviolet rays may be performed. That is, a surface treatment that improves the adhesion of the first rubber-like elastic body to the metal layer 2 may be performed.

  In the first and second embodiments, the metal layer 2 is a flat metal plate. However, the metal layer 2 is not limited to this, and a metal plate (punching plate) subjected to punching (punching). ). As the punching plate, for example, a plurality of holes having a diameter of 4 mm and a pitch of 7 mm may be formed on an aluminum plate having a purity of 99.9%. In addition, by adjusting the size of the metal plate to be used, the size of the hole to be formed, and the ratio of the holes, it is possible to adjust the stress required when the shape maintaining sheet is deformed to a desired size. When the metal layer 2 is a punching plate, the primer is also applied to the inner peripheral surface of the hole of the punching plate, and the first rubber-like elastic body is bonded to the hole. Therefore, the metal layer 2 and the first elastic body layers 3 and 6 are more firmly bonded.

  Further, in the second and third embodiments, a first liquid condensation type rubber-like elastic material is used which is liquid when stored in the storage container, and then hardens when taken out from the storage container. Although the example which forms the 1 elastic body layer 6 was shown, the method of forming the 1st elastic body layer 6 is not restricted to this, For example, the one-component addition type rubber-like elastic body material hardened | cured by heating is shown. The first elastic layer 6 may be formed by using a metal layer 2 coated with a primer in a predetermined mold, and the uncured first rubber-like elastic material is placed in the mold. Alternatively, an insert molding method in which the first elastic body layer 6 is formed around the metal layer 2 may be used. In the third embodiment, the first elastic body layer 6 may be made of a silicone rubber composition having strong adhesion to the metal layer shown in the first embodiment.

  In the first to fourth embodiments, a desired marking may be transferred to the outer surfaces of the second elastic layers 4 and 9 when formed by an insert molding method. You may decorate the outer surface of the 2nd elastic body layers 4 and 9 by printing.

  The shape maintaining sheet according to the present invention can be used for, for example, a tray, a box, a packaging material, and the like.

DESCRIPTION OF SYMBOLS 1 Shape maintenance sheet 2 Metal layers 3 and 6 1st elastic body layer 4 2nd elastic body layer 5 Primer layer 7 Porous metal plate

Claims (11)

A shape-holding sheet that can be deformed into a predetermined shape and hold the shape,
A metal layer,
Around the metal layer, a first elastic layer composed of a first rubber-like elastic body,
A second elastic layer composed of a second rubber-like elastic body having a higher hardness than the first rubber-like elastic body, and covering the periphery of the first elastic layer;
A shape-retaining sheet.   The shape maintaining sheet according to claim 1, wherein the first elastic body layer is configured around the metal layer that has been subjected to a surface treatment.   The shape maintaining sheet according to claim 2, wherein the surface treatment is a treatment of applying a primer around the metal layer.   The shape-retaining sheet according to any one of claims 1 to 3, wherein the first rubber-like elastic body is formed of a silicone rubber composition having adhesion to a metal.   The shape maintaining sheet according to any one of claims 1 to 4, wherein the metal layer is a porous metal plate in which a plurality of holes communicating with the outside are formed.   The shape maintaining sheet according to claim 5, wherein the hole has a diameter of 1 μm or more and 100 μm or less.   The shape maintaining sheet according to claim 5 or 6, wherein the first rubber-like elastic body enters at least a part of the holes of the porous metal plate.   The shape maintaining sheet according to any one of claims 1 to 4, wherein the metal layer is a punched metal plate.   The shape maintaining sheet according to any one of claims 1 to 8, wherein the first rubber-like elastic body and the second rubber-like elastic body are silicone rubber. A shape holding sheet manufacturing method for manufacturing a shape holding sheet that can be deformed into a predetermined shape and hold the shape,
A first elastic layer forming step of forming a first elastic layer composed of a first rubber-like elastic body around the metal layer;
A second elastic layer forming step of forming a second elastic layer composed of a second rubber-like elastic body having a higher hardness than the first rubber-like elastic body around the first elastic layer;
The manufacturing method of the shape maintenance sheet | seat which has this. A surface treatment step of performing a surface treatment on the metal layer;
The method for producing a shape-retaining sheet according to claim 10, wherein the first elastic body layer forming step forms the first elastic body layer around the metal layer subjected to the surface treatment.