JP2003128936A - Elastomer and heat resistant cushion material for mold press containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an elastomer maintaining quality without generating bleeding even when used under high temperature and high pressure conditions. SOLUTION: This elastomer contains an elastic material and an additive for absorbing components bled from the elastomer by heating and/or compression.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic body and a heat-resistant cushion material for a molding press including the elastic body.

[0002]

2. Description of the Related Art Heat-resistant cushioning materials for molding presses are mainly composed of synthetic resin as a molding material, such as paper-phenolic laminates and glass epoxy laminates for printed circuit boards, or decorative plywood for construction such as melamine resin and phenolic resin. It is used to form a flat sheet (resin prepreg), and recently is also used in a liquid crystal cell assembling process. Generally, the heat-resistant cushioning material for molding presses used for these materials absorbs unevenness, deformation, thickness unevenness, etc. of the hot platen or mirror surface plate and transfers uniform pressure and heat to the entire surface of the molding prepreg (B stage state). It has an important function of doing. That is, in the hot pressing process, the prepreg once decreases its viscosity by heating and returns to a liquid state, and then gradually hardens, so that heat and pressure from the hot platen are evenly transferred to the entire surface of the prepreg sheet during molding. As described above, the metal mirror plate is arranged on the surface of the prepreg sheet via the release film or the copper foil, and the cushion material is interposed between the hot platen and the metal mirror plate.

Conventionally, a plurality of cushion papers, such as kraft papers, have been used as the cushioning material in such a manner that they are piled up according to the molding conditions. However, the pulp is damaged and brittles due to heat and pressure during use. Those with severe conditions could only be used once. For this reason, it is necessary to replace the kraft paper every time, and it is necessary to count and prepare the required number of sheets according to the molding conditions. Furthermore, it is not possible to set the press machine with a machine, so it is necessary to save labor. There was a problem. Furthermore, it was necessary to stock a huge amount of kraft paper, and it was necessary to air-condition it so that it would not be affected by outside air (humidity) while it was stocked, which was very troublesome. Furthermore, paper dust may be scattered from the cut surface of the kraft paper, which may adversely affect the product.

Therefore, instead of kraft paper, a cushion material mainly composed of rubber or a cushion material in which heat resistant fibers such as aromatic polyamide fibers are laminated and entangled and integrated by needle punching has been developed and used depending on molding conditions. Although the number of times is different, it can be used hundreds of times.

The above-mentioned cushion material composed mainly of rubber and heat-resistant fibers such as aromatic aramid fibers which are laminated and entangled and integrated by needle punching can endure repeated use under high temperature and high pressure. It was However, the performance and quality required for printed circuit boards have become more and more severe due to the recent miniaturization and high performance of home electric appliances and the rapid spread and miniaturization of personal computers.

Accordingly, the rubber-based cushion material is
In the initial stage of use, it has a good cushioning property and can be used satisfactorily. However, the repeated use under high temperature and high pressure makes the rubber abruptly brittle, so that the amount of cushion abruptly decreases and there is a possibility that defective products may occur in the laminate. Further, in recent years, the quality that has not been a problem in the past can sometimes be unusable because it cannot satisfy the required quality level improvement due to an increase in the number of wirings between the pins and the like.

On the other hand, a felt-like cushioning material in which heat-resistant fibers such as aromatic polyamide fibers are laminated and entangled and integrated by needle punching can withstand repeated use under high temperature and high pressure, but is repeatedly used. In accordance with the above, due to the resin mold flow of the molded product generated when molding the substrate, the cushioning material has a concave mold and the cushioning amount of the felt cushion material itself decreases, so that the pressure equalizing property to the prepreg gradually deteriorates during molding. However, the slight unevenness of the surface of the laminated board, which was not a problem in the past, could not satisfy the recent demands for increasing the number of wirings between the pins of the wiring board, etc. It has become possible.

Furthermore, recently, with the tremendous increase in the sales volume of book type personal computers, "fluorine rubber" and "silicone sponge", which are cushion materials for molding presses used in the cell assembly process of liquid crystal panels. ", The following drawbacks are pointed out. Fluorine rubber cannot be discarded after use because it emits toxic gas.Silicone sponge can be used only a few times, resulting in high running costs and uneven thickness, which causes pressure spots and further lowering. Since siloxane of the molecule is generated, there is a problem that the water repellency and oil repellency caused by the siloxane undesirably affect the product.

The inventors of the present invention have conducted extensive studies in order to achieve the high quality required for the above-mentioned laminated sheet, and have taken advantage of the advantages of a rubber-based cushion material and the advantages of a felt cushion material using heat-resistant fibers, A new type of cushioning material was developed and patented (Patent Application No. 2000-283715), which allows the rubber layer of the core material to have appropriate voids and maintains the pressure equalizing property and the stable temperature rising property with respect to the prepreg for a long period of time.

However, the above cushion material is
In the initial stage of use, it has a rich cushioning amount to achieve the high quality required for laminated sheets, and it can show pressure equalizing property and stable temperature rising property with respect to prepreg, but as the number of times of use increases, prevention of aging from the rubber layer The bleeding of the agent (antioxidant) etc. (hereinafter referred to as "bleed") and the blockage of the voids can be seen, and the quality of the molded product is satisfactory, but there is a problem in the number of times of use. It was

[0011]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the above-mentioned problems and to provide an elastic material whose quality is maintained without bleeding even when used under high temperature and high pressure. To provide the body.

[0012]

Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems, and are components that can bleed from an elastic body by heating and / or pressurization.
For example, they have found that the above problems can be solved by adding an additive that adsorbs an antioxidant (antioxidant) and the like, and have completed the present invention.

That is, the present invention relates to an elastic body containing an elastic material, wherein the elastic body contains an additive for adsorbing a component capable of bleeding from the elastic body by heating and / or pressurizing. . In addition, the present invention, the elastic material,
The present invention relates to the elastic body, which is heat resistant.

Furthermore, the present invention relates to the elastic body, wherein the glass transition point of the elastic material is room temperature or lower. Further, the present invention relates to the elastic body, wherein the elastic material is rubber. Furthermore, the present invention relates to the elastic body, wherein the elastic material is porous having a plurality of dispersed voids.

Further, the present invention is characterized in that the additive is one or more kinds of porous materials selected from the group consisting of diatomaceous earth, calcium silicate and activated carbon.
Regarding the elastic body. Furthermore, the present invention relates to the elastic body, wherein the amount of the additive added is in the range of 5 wt% to 50 wt% with respect to the weight of the elastic material.

Further, the present invention relates to the elastic body, wherein the elastic material expands in the thickness direction and holds voids as the temperature rises during the molding process. further,
The present invention relates to the elastic body, which further comprises a heat-resistant woven fabric and / or a non-woven fabric. The present invention also relates to a heat-resistant cushioning material for a molding press, which comprises the elastic body as a core material.

The elastic body of the present invention containing an additive that adsorbs to the bleeding component does not cause bleeding even under high temperature and high pressure because the additive captures these components.
Further, the elastic body of the present invention not only has an effect of preventing bleeding by adsorption, but a hard solid additive is present around the voids in the elastic body and the elastic body, thereby exerting a structural reinforcing effect, The shape can be maintained without the elastic body and the voids of the elastic body being crushed even when pressure and heating are repeated.

In the heat-resistant cushioning material for molding press according to the present invention, by using the above-mentioned elastic body, rigidity of the cushioning material is improved and the thickness is maintained by maintaining voids even under pressing, so that the thickness is maintained for a long period of time. A sufficient amount of cushion can be maintained. Further, the heat-resistant cushioning material for a molding press according to the present invention, when a material having a glass transition point of room temperature or lower is used, the soft rubber-like state can be maintained in the whole temperature range during the heat-molding process. It is possible to absorb unevenness, deformation, thickness unevenness, etc. of the mirror surface plate and to transmit a uniform pressure to the front surface of the molded prepreg for a long time, and it is possible to sufficiently cope with the production of high quality products. The felt-like cushion material obtained by integrating the elastic body with the felt-like cushion material can adjust the heat transfer amount by changing the basis weight, but the voids in the elastic body are maintained. Thus, it is possible to correct the temperature unevenness in the hot platen and transfer a uniform amount of heat to the prepreg.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. The elastic material used in the present invention has heat resistance and is under molding press conditions (for example, molding conditions for a glass epoxy laminate, temperature: 180 to 210 ° C., pressure: 30 to 50 kg / cm ² , paper phenol). Laminating plate molding conditions, temperature: 160 to 190 ° C., pressure: 80 to 120
Any material may be used as long as it can be used under kg / cm ² , pressing conditions in the liquid crystal cell assembling step, temperature: 160 to 180 ° C., pressure: 3 to 5 kg / cm ² . Further, those having a glass transition point of room temperature or lower are preferable because they are soft rubber in the entire temperature range during the heat molding process, and those that expand in the thickness direction with a temperature rise during the heat molding process are elastic bodies. It is preferable because it retains the voids inside. Such elastic materials include polyisoprene rubber, styrene butadiene rubber, polybutadiene rubber, chloropyrene rubber, acrylonitrile butadiene rubber, hydrogenated nitrile rubber, carboxylated nitrile rubber, butyl rubber, ethylene propylene rubber, acrylic rubber, fluororubber. , Silicone rubber, chlorosulfonated polyethylene rubber, chlorinated polyethylene rubber, epichlorohydrin rubber and the like, and copolymers and mixtures of a plurality of materials selected from these are preferable.

The thickness of the elastic material, the size of the voids, and the porosity are appropriately determined depending on the amount of cushion required according to the thickness precision of the hot platen, the thickness precision of the prepreg, the thickness precision desired for the copper clad laminate to be molded, and the like. The thickness is selected, for example,
The range of 0.3 to 5.0 mm is preferable, and the size of the void is
20 to 200 μm is preferable, and 50 is more preferable.
To 150 μm, the porosity is preferably 5 to 80%,
The range of 10 to 60% is more preferable.

In the elastic body of the present invention, as an additive for adsorbing a component capable of bleeding from the elastic body by heating, any additive may be used as long as it has heat resistance and achieves the effect of the present invention. However, porous materials such as diatomaceous earth, calcium silicate, and activated carbon are preferable.

The addition amount of the above-mentioned additive is used in consideration of the sufficient adsorption effect, the sheet workability of the elastic body, and the cushion amount. For example, 5 wt% to the weight of the elastic material is used.
A range of 50 wt% is preferable, and 5 w is more preferable.
It is in the range of t% to 40 wt%.

Further, the elastic body of the present invention can contain an antioxidant (antioxidant), silica, carbon black, a vulcanizing agent, etc. Usually, as a component which bleeds by heating, typically, Substituted diphenylamine (Naugard4
Antiaging agents (antioxidants) such as 45 (Uniroyal Chem) and non-flex DCD (Seiko Chemical Co., Ltd.) are considered.

The elastic body of the present invention may be impregnated with a heat-resistant woven fabric or non-woven fabric, if necessary, for the purpose of dimensional stability during use and improvement of cell retention. Glass fiber, PBO fiber, aromatic polyamide fiber and the like are used as the material of the heat resistant woven fabric and the non-woven fabric.

In order to obtain the elastic body of the present invention, the above additives are added to the elastic material and the plastic foaming agent is uniformly dispersed in the heat resistant elastic material. After making this a sheet of constant thickness,
The elastic body of the present invention can be obtained by vulcanization.

When the elastic body of the present invention is used as a heat-resistant cushion material for a molding press, the elastic body can be used as it is, but the main raw material is a heat-resistant material such as aromatic polyamide fiber on both sides, one side or in the middle. It is also possible to attach a felt-like cushion material having a batt fiber layer to a base cloth made of flexible fibers and use it as a core material. Such a felt-like cushioning material containing heat-resistant fibers is preferable because the temperature rising rate during the molding press can be adjusted by changing the basis weight.

The heat-resistant fibers used for the base cloth and the batt are molded under high-temperature and high-pressure molding and pressing conditions (for example, molding conditions for glass epoxy laminate, temperature: 180 to 210 ° C., pressure: 30 to 50 kg / cm ² , paper. Molding conditions for phenol laminated plate, temperature: 160 to 190 ° C., pressure: 80 to 120
Any heat-resistant fiber may be used as long as it is a heat-resistant fiber that can be stably used for a long period of time under a pressure condition of kg / cm ² , a liquid crystal cell assembling step, a temperature of 160 to 180 ° C., and a pressure of 3 to 5 kg / cm ^2. However, for example, an aliphatic polyamide fiber, a polyethylene terephthalate fiber, a polyphenylene sulphite fiber, a polyether ether ketone fiber, an aromatic polyamide fiber or the like can be appropriately selected and used.

The elastic body and the felt-like cushion material of the present invention are bonded by using a heat-resistant adhesive film after vulcanization of the elastic material, and by press working also as vulcanization before vulcanization. Do it together.

Furthermore, when a felt-like cushion material is attached to both sides, one surface or the middle, heat-resistant paper, heat-resistant woven cloth, heat-resistant film, metal foil, etc. may be formed on the surface of the felt-like cushion material, if necessary. The heat resistant sheet material can be bonded by using a heat resistant adhesive or self-adhesiveness by heating and pressing. In this case, the heat-resistant sheet material forms a film to block ventilation, so that not only automatic conveyance by a suction pad that can save manpower can be achieved, but also fluffing and hair loss prevention of the felt cushion material surface You can

[0030]

EXAMPLES The elastic body and the heat-resistant cushioning material for molding press of the present invention will be explained in detail below with reference to examples, but these do not limit the present invention at all. [Example 1] 5 wt% porous material diatomaceous earth (trade name: Radiolite) in ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the thermoforming process at a glass transition temperature of room temperature or lower ) And a plastic foaming agent are mixed so that the voids are appropriately dispersed in the rubber, and a sheet of an elastic body (rubber) having a thickness of 1.0 mm serving as a core material is prepared. A felt cushion material made of heat-resistant fibers such as aromatic polyamide having a basis weight of 450 g / m ² is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (adhesion condition: 200 ° C., 10 kg / cm ² ,
15 minutes, gauge: 3.0 mm), porosity of 40% is secured, and elastic body and felt cushion material are bonded together.
A heat-resistant cushion material for molding press using the elastic body of the present invention having a basis weight of 2000 g / m ² was obtained.

Example 2 Ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat molding process at a glass transition temperature of room temperature or lower, has 30 wt% of radiolite and a proper void in the rubber. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 1.0 mm to be a core material is prepared. In addition to this, the basis weight 450
A felt cushion material made of heat-resistant fibers such as g / m ² of aromatic polyamide is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (bonding condition: 2
00 ° C, 10 kg / cm ² , 15 minutes, gauge: 3.0 m
m) and a porosity of 40% were secured, and an elastic body and a felt cushion material were bonded together to obtain a heat-resistant cushion material for a molding press using the elastic body of the present invention having a basis weight of 2190 g / m ² .

Example 3 Ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat-molding process at a glass transition temperature of room temperature or lower, has 50 wt% of radiolite and a proper void in the rubber. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 1.0 mm to be a core material is prepared. In addition to this, the basis weight 450
A felt cushion material made of heat-resistant fibers such as g / m ² of aromatic polyamide is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (bonding condition: 2
00 ° C, 10 kg / cm ² , 15 minutes, gauge: 3.0 m
m) and a porosity of 40% were secured, and an elastic body and a felt cushion material were stuck together to obtain a heat-resistant cushion material for a molding press using the elastic body of the present invention having a basis weight of 2250 g / m ² .

Example 4 Ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat-molding process at a glass transition temperature of room temperature or lower, contains 15 wt% of radiolite and a proper void in the rubber. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 0.5 mm to be a core material is prepared. In addition to this, the basis weight 450
A felt cushion material made of heat-resistant fibers such as g / m ² of aromatic polyamide is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (bonding condition: 2
00 ° C, 10 kg / cm ² , 15 minutes, gauge: 2.5 m
m) and a porosity of 20% were secured, and an elastic body and a felt cushion material were bonded together to obtain a heat-resistant cushion material for molding press using the elastic body of the present invention having a basis weight of 1485 g / m ² .

Example 5 A fluoroacryl rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat-molding process at a glass transition temperature of room temperature or lower, has 30 wt% of radiolite and a proper void in the rubber. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 1.0 mm to be a core material is prepared. In addition to this, the basis weight 450
A felt cushion material made of heat-resistant fibers such as g / m ² of aromatic polyamide is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (bonding condition: 2
00 ° C, 10 kg / cm ² , 15 minutes, gauge: 3.0 m
m) and a porosity of 40% were secured, and an elastic body and a felt cushion material were bonded together to obtain a heat-resistant cushion material for molding press using the elastic body of the present invention having a basis weight of 2150 g / m ² .

Comparative Example 1 Ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat molding process at a glass transition temperature of room temperature or lower, has 3 wt% of radiolite and a proper void in the rubber. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 1.0 mm to be a core material is prepared. In addition to this, 450 g of basis weight
/ M ² of felt cushion material made of heat-resistant fiber such as aromatic polyamide is arranged on both sides, and a gauge is inserted during hot pressing to adjust the thickness (adhesion condition: 20
0 ° C, 10 kg / cm ² , 15 minutes, gauge: 3.0 m
m) and a porosity of 40% were secured, and an elastic body and a felt cushion material were bonded together to produce a heat-resistant cushion material for forming press having a basis weight of 1990 g / m ² .

[Comparative Example 2] 55 wt% of radiolite and an appropriate gap in the rubber of ethylene acrylic rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the thermoforming process at a glass transition temperature of room temperature or lower. A plastic foaming agent is mixed so as to disperse in the above, and an elastic body (rubber) sheet having a thickness of 1.0 mm to be a core material is prepared. In addition to this, the basis weight 450
A felt cushion material made of heat-resistant fibers such as g / m ² of aromatic polyamide is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (bonding condition: 2
00 ° C, 10 kg / cm ² , 15 minutes, gauge: 3.0 m
m), a porosity of 40% was secured, and a heat-resistant cushion material for a molding press having a basis weight of 2260 g / m ² was obtained by sticking an elastic body and a felt cushion material.

Comparative Example 3 A plastic foaming agent so that voids are appropriately dispersed in fluoroacryl rubber, which is an elastic rubber material that expands in the thickness direction as the temperature rises during the heat molding process at a glass transition temperature of room temperature or lower. Are mixed to prepare a sheet of elastic body (rubber) having a thickness of 1.0 mm as a core material. A felt cushion material made of heat-resistant fibers such as aromatic polyamide having a basis weight of 450 g / m ² is placed on both sides, and a gauge is inserted during hot pressing to adjust the thickness (adhesion condition: 200 ° C., 10 kg / cm ² , 15 minutes, gage: 3.0 mm), porosity of 40% is secured, and elastic body and felt cushion material are pasted together to give a basis weight 218.
A heat-resistant cushion material for a molding press having a weight of 0 g / m ² was manufactured.

Tables 1 and 2 show the results of physical properties and performance evaluations of Examples 1 to 5 which were the products of the present invention and Comparative Examples 1 to 3 which were the existing products.

[0039]

[Table 1]

[0040]

[Table 2]

* 1. Repeated press condition: 200 ℃ ・ 40
Repeated pressing at kg / cm ² was performed to evaluate the bleeding state and the retention of voids. 1 cycle: temperature rise 15 minutes → hold 45 minutes → heating / cooling 1
Repeat 5 minutes-> depressurization release-> 15 minutes. * 2. Bleed state ○: There is no change in the felt surface and it can be used without any problems. ×: A state in which bleeding components started to be scattered on the felt surface * 3. Void retention state ○: The state inside the rubber is maintained as compared to when it was new. ×: The state where the void is crushed compared to when it is new * 4. The bubble diameter of the voids controls the foaming state by the gauge thickness during pressing.

In the embodiment, the felt cushion material is laminated on both sides of the elastic body, but the felt cushion material may be laminated on only one side of the elastic body without being particular about this. Further, the felt cushion may be sandwiched between elastic bodies contrary to the embodiment. Further, for those in which dimensional stability is strongly desired, a heat-resistant woven or non-woven fabric may be used for the rubber layer which is an elastic body.

[0043]

As can be seen from Tables 1 and 2, the amount of the additive for adsorbing the bleeding component such as radiolite to the elastic material such as ethylene acrylic rubber of the present invention is 5 to 50%.
In this case, bleeding that occurs under high temperature and high pressure can be effectively prevented. When the amount of the additive added is 5% or less, the elastic body cannot absorb the bleed component and the bleed appears early, and when the amount of the additive added exceeds 50%, it becomes difficult to form a rubber sheet.

Furthermore, since the above-mentioned additive not only adsorbs the bleeding component but also exerts a structural reinforcing effect in the elastic body, it is possible to maintain its shape without crushing the appropriately dispersed voids in the elastic body. it can. This depends on the presence or absence of additives in the fluoroacrylic rubber. That is,
Since the fluoracrylic rubber does not contain an antioxidant, the occurrence of bleeding does not depend on the presence or absence of the additive, but it appears as a large difference in the state of holding voids.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a heat-resistant cushion material for a molding press of the present invention (the elastic body has no base cloth).

FIG. 2 is a cross-sectional view showing another embodiment of the heat-resistant cushioning material for a molding press of the present invention (the elastic body contains the base cloth).

3 (a) and 3 (b) are cross-sectional views showing another embodiment of the heat-resistant cushioning material for a molding press of the present invention (a): No elastic base material and heat-resistant sheet material attached on both sides of felt (b) ): No elastic base fabric, heat-resistant sheet on one side of felt

4 (a) and 4 (b) are cross-sectional views showing another embodiment of the heat-resistant cushioning material for a molding press of the present invention (a): The elastic body has a base cloth, and the heat-resistant sheet material is attached to both sides of the felt (b). ): There is a base cloth on the elastic body, and a heat resistant sheet material is attached to one side of the felt

5 (a), (b) and (c) are cross-sectional views of the elastic body, felt, heat-resistant adhesive sheet of the heat-resistant cushioning material for molding press of the present invention and the heat-resistant sheet before they are bonded.

FIG. 6 is a cross-sectional view of a conventional product having no void in the elastic body.

[Simple explanation of symbols]

1 Inventive product 2 Rubber containing a porous material in which voids are appropriately dispersed and held 3 Heat-resistant adhesive sheet 4 Heat-resistant base cloth of felt-like cushion material 5 Heat-resistant butt fiber layer 6 of felt-like cushion material 6 Felt-like Cushioning material 7 Heat-resistant woven fabric / nonwoven fabric impregnated with resin so that the voids are held appropriately Resin processed product 8 Heat-resistant woven fabric / heat-resistant paper / heat-resistant film 9 Rubber without voids

Continued front page    (72) Inventor Hiroyuki Takamura             1360-8-B, Sumiyoshi, Tomobe-cho, Nishi-Ibaraki-gun, Ibaraki Prefecture             201 (72) Inventor Masahiro Nomura             5-6-7 Shiroyama, Komaki City, Aichi Prefecture (72) Inventor Hiroyuki Nagata             4-7-13 Nishiso, Gifu City, Gifu Prefecture F term (reference) 4F074 AA05 AA17 AA46 CA21 CC03Z                       CC04Z CC42 DA02 DA23                       DA33 DA54                 4F204 AG20 AJ05 FA15 FB01 FQ17                 4J002 AC031 AC061 AC071 AC081                       AC091 AC101 AC111 BB111                       BB151 BB181 BB241 BB271                       BD121 BG041 CF00 DA038                       DJ007 DJ036 FD070 GG00

Claims (10)

[Claims] 1. An elastic body containing an elastic material, wherein the elastic body contains an additive for adsorbing a component capable of bleeding from the elastic body by heating and / or pressurizing. 2. The elastic body according to claim 1, wherein the elastic material is heat resistant. 3. The elastic body according to claim 1, wherein the glass transition point of the elastic material is room temperature or lower. 4. The elastic body according to claim 1, wherein the elastic material is rubber. 5. The elastic body according to any one of claims 1 to 4, wherein the elastic material is porous having a plurality of dispersed voids. 6. The additive according to claim 1, wherein the additive is one or more kinds of porous materials selected from the group consisting of diatomaceous earth, calcium silicate and activated carbon. The elastic body described. 7. The elastic body according to claim 1, wherein the amount of the additive added is in the range of 5 wt% to 50 wt% with respect to the weight of the elastic material. 8. The elastic body according to claim 1, wherein the elastic material expands in the thickness direction and retains voids as the temperature rises during the molding step. 9. The elastic body according to claim 1, further comprising a heat-resistant woven fabric and / or a non-woven fabric. 10. A heat-resistant cushion material for molding press, comprising the elastic body according to claim 1 as a core material.