TWI373406B - - Google Patents

Description

1373406 IX. The present invention relates to a cushioning material for heat-resistant pressing and a method for producing the same, and more particularly to a heat-pressing disk and a molded article, and a hot-pressed disk and A heat-resistant pressing cushioning material and a method for producing the same, which have a uniform pressure and heat and a cushioning property. [Prior Art] The heat-resistant pressing cushioning material is disposed between the hot-pressed disc and the molded product, and is used for pressure-proof molding to prevent plague of the hot-pressed disc and to apply uniform pressure and heat, and to require cushioning and heat conduction. Sex and durability. In the past, the use of kraft paper was about 5 to 20 sheets, but the number of uses was only about ^ times, and the durability was hardly used in recent years. On the other hand, as a cushioning material for improving durability, a person who uses synthetic rubber is now used. The representative structure is a combination of a woven fabric, a nonwoven fabric or a felt layer composed of a high heat resistant fiber such as glass fiber or an aromatic polyamide fiber, and a synthetic rubber layer such as butyl rubber or fluororubber. Further, it is known that in order to maintain the release property, a heat-resistant release layer such as a thin plate coated with a fluororesin film or a heat-resistant resin on the surface of the cushioning material is bonded. Further, a fluororubber is provided on both surfaces of the glass fiber cloth, and a polyamide fiber is laminated on the surface of the fluororubber. (Patent Document 丨) In this case, in addition to the cushioning property of the surface woven fabric, there is a feature that the cushioning property is further improved by the interlayer voids generated at the time of lamination. [Patent Document 1] Patent No. 3,259,741, Specification No. 106048.doc ^73406 "," and "If a previously used felt is used as a cushioning member", since the degree of freedom of the constituent fibers is large and soft, there will be Even in the case where the fine particles are present, the problem of the thickness and the voids and the short life are likely to occur in the object to be processed such as a laminate. Further, the amount of deflection required for the composition of the molded article is different. In the case of a large amount of deflection, there is a problem that the amount of deflection of the cushioning material is insufficient. Further, the rubber of the rubber layer can be plasticized during vulcanization, toward the woven or non-woven fabric.

The voids in the layer will have a problem that the woven or non-woven layer should have a reduced cushioning property. The present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a heat-resistant pressing cushioning material which is excellent in cushioning property, reduces compression set, and improves resistance. method. In the present invention, the present invention is a heat-resistant pressing cushioning material which is used between a hot-pressed disk and a molded article, and is characterized in that a bulky multi-woven fabric having a layer of less than one layer is used. The components are constructed and cushioned to 'reduce compression set and improve durability. Further, the present invention comprises: a heat-sensitive fiber member provided with a heat-resistant tree on the surface layer, and a plurality of layers of the h layer or the second layer in the intermediate layer between the surface layer and the intermediate layer or in the intermediate layer Between the layers of the rubber layer, the 'buffering is better', the dust shrinkage and permanent deformation are small, and the durability is improved: and 'in the case of using two layers of multiple woven fabrics, the amount of deflection during deformation is large, and the thickness can be increased. (iv) Impulsiveness. (1) 吏大' can also reduce compression set and maintain sea I06048.doc 1373406=Invention, heat resistance treated with heat-resistant resin in the surface layer = member's multi-woven fabric with two layers in the middle layer, on the above surface Layer: The case where a rubber layer is interposed between the interlayers or between the intermediate layers, and the total thickness is increased. 'The amount of deflection during compression deformation is large even every shape, and the temperature is kept slow. The constituent line comprising the multiple woven fabric comprises: a crimping processing line: the case where the multiple woven fabric is a 2-weave or a 4-weave woven fabric; and the constituent thread of the multi-woven fabric is at least selected from the group consisting of glass fiber and carbon fiber m fiber. One type of inorganic fiber is used as a material; the heat-resistant fiber member of the surface layer is made of a heat-resistant fiber selected from aromatic polyamine fibers, polyphenylene sulfide (tetra), glass fibers, and carbon fibers, or aromatic a case where the short fibrils of the aramid fiber are formed; the heat-resistant fiber member of the surface layer is treated with a heat-resistant resin; and a heat-resistant rubber selected from the group consisting of fluororubber and ruthenium rubber is used as the rubber layer. And a case where a rubber layer reinforced by a short fiber is interposed between a gate of a surface layer and an intermediate layer or a middle layer. Further, the present invention is a method for producing a heat-resistant hot press cushioning material. The heat-pressing cushioning material is used between the hot-pressed disc and the molded article. The method is to provide a multi-woven fabric having a bulky layer of at least one layer on the surface layer and a bulky woven fabric on the intermediate layer. After the laminate is formed between the intermediate layers and/or between the intermediate layers with an unvulcanized rubber layer, the laminate is placed under heating without any state, and the rubber layer is dusted and vulcanized immediately after the crosslinking reaction starts. By laminating and integrating, by placing the rubber layer under pressure and thinning immediately after the start of the crosslinking reaction in the pressureless state, it is possible to suppress the penetration of the rubber into the multi-woven fabric, and it is possible to manufacture the hole by sufficiently ensuring 106048.doc l3734〇6 The heat-resistant pressing cushioning material which has a cushioning property, a small shrinkage permanent deformation, and an improved durability is provided in the space of the interior. The present invention is a laminate having a temperature of 15 〇 ec to i8 (rc, in a dust-free state). After being placed for 2 15 knives, 'pressurizing and vulcanizing at this temperature and laminating the integrated one' can surely inhibit the penetration of the rubber into the multi-woven fabric during vulcanization. This month as a rubber layer is selected from the rubber layer. And a heat-resistant rubber which is at least one kind of a stone rubber, and a heat-resistant cushioning material can be produced. [Embodiment] According to the heat-resistant pressing cushioning material of the present invention, a multi-woven fabric which is fluffy at least i-layer is produced. As a constituent member, a plurality of space portions are provided to have a cushioning property and a function of preventing deformation of the cushioning material when the pressing is repeated, and the effect of reducing compression deformation and improving durability can be achieved. In the method for producing a heat-resistant pressing cushioning material of the present invention, by laminating the laminate in a pressureless state, pressurizing, vulcanizing, laminating and integrating the rubber layer immediately after the start of crosslinking, the rubber can be inhibited from infiltrating during vulcanization. In the multi-woven fabric, the cushioning property can be improved by sufficiently ensuring the space in which the air is retained in the interior, and further, the multi-woven fabric having at least a layer of loftiness is used as the constitution. Therefore, a space provided with a plurality of portions and having a buffer function to prevent the buffering of the modification of the material is repeatedly pressed with a compression deformation can be reduced, so that an effect of improving the durability. The present embodiment will be described below with reference to the drawings. 1 is a cross-sectional view of a heat-resistant pressing cushioning material according to the present invention, and the heat-resistant pressing cushioning material 1 of the present invention is a surface layer 3 composed of a heat-resistant fibrous member 2; The intermediate layer 6 composed of the woven fabric 5; and the rubber layer 7 impregnated with the surface layer 3 and the intermediate layer 6 between the surface layer 3 and the intermediate layer 106048.doc 1373406 6 are vulcanized and integrated. a layer of adhesive between layers. Since the intermediate layer 6 is made of a bulky fiber and is a multi-woven fabric, there is a space portion which has a cushioning property and a function of blocking the cushioning/deformation when the pressing is repeated.

Further, in the heat-resistant pressing cushioning material 图 shown in Fig. 2, the intermediate layer 6 composed of the multi-woven fabric 5 having a lotus-like property is laminated in two pieces. That is, the cushioning material 1 is a surface layer 3 composed of the heat-resistant fiber member 2, an intermediate layer 6 composed of two layers of the multi-woven fabric 5 having a fluff, and between the surface layer 3 and the intermediate layer 6. A laminate in which the rubber layer 7 is interposed between the intermediate layer 6 and the intermediate layer 6, and between the intermediate layer 6 and the surface layer, and is vulcanized and integrated, and the layers are adhered. In the above-mentioned heat-resistant pressing cushioning material, even if the total thickness is large, since the compression ratio is not changed as compared with the case where one intermediate layer 6 is used, the cushioning effect can be maintained even if the amount of deflection is increased. In the present invention, the intermediate layer 6 composed of the multi-woven fabric 5 may be laminated on the left and right sides of 3 to 5 sheets. In the manufacturing method of the present invention, the rubber layer 7 of the unvulcanized rubber sheet having a thickness of 0.10 to 0.50 mm is laminated on both surfaces of the multi-woven fabric 5, and the heat-resistant fiber cloth 2 is further laminated on each surface of the rubber layer 7. The laminate is placed in a normal press vulcanization apparatus at a temperature of 15 Torr to 18 〇〇c and placed under no pressure for 2 to 15 minutes. "After the crosslinking of the rubber layer 7, the surface is maintained at the above temperature, and the surface is placed. The pressure was increased to 〇1 to 5 〇 MPa, and vulcanization was carried out for 1 〇 to 4 〇 minutes to form a heat-resistant pressing cushioning material 1 shown in Fig. 1 . Further, in the method for producing the heat-resistant pressing cushioning material 1 shown in Fig. 2, 106048.doc 1373406 - a rubber layer of an unvulcanized rubber sheet having a thickness of 0.10 to 0.50 mm is laminated on both sides of the multi-woven fabric 5, respectively. 7. After laminating the multiple woven fabrics 5, the same rubber layer 7 is laminated on one surface to form two intermediate layers 6, and the heat-sensitive fiber cloth 2 is laminated on both sides, and then the conventional vulcanization apparatus is pressed. Place the resin layer 7 at a temperature of 150 to 180 ° C for 2 to 15 minutes without pressure to start crosslinking. At this temperature, the surface pressure was increased to 0.^5 〇 MPa, and vulcanization was carried out for 10 to 40 minutes, and the laminate was integrated. In this way, the rubber layer is preliminarily joined to the unbonded state, and the surface layer and the intermediate layer are laminated and integrated, and the rubber can be prevented from infiltrating into the multi-woven fabric during vulcanization, thereby sufficiently ensuring that the air is sufficiently retained inside. Space can improve cushioning. The time to be placed in the no-pressure state is preferably greater than the time when the minimum torque value of the rheometer test is exceeded or less than the maximum torque value. In the case of the present invention, it is preferably from 0.2 to 15 minutes. When the laminate is pressurized or vulcanized, the rubber layer flows toward the multi-woven fabric 5, and the gap between the fibers is filled, and sufficient cushioning properties and durability are not obtained. On the other hand, if it is at least the time of the highest torque value, the adhesion between the rubber layer and the multi-woven fabric is poor, and the surface layer and the intermediate layer are liable to be peeled off. Moreover, in order to further improve the compression deformation resistance, it may be 2 to 25 Torr.匚 After hardening, apply for 30 minutes to 4 hours. The above-mentioned bulky multi-woven fabric 5 can be a 2 woven fabric, a 3 woven fabric

Cloth, or 4 heavy woven fabrics, etc., the state is processed by the pine. For example, the 'two-weave woven fabric is as shown in Fig. 1, and is formed on the fourth warp yarn 9, and on the other hand, on the same side, on the surface weft 8 & interlaced position, another weft 8b 106048.doc 11 1373406 - the same The structure is interwoven with the second weaving of the fourth warp yarn 9. Thus, since the 2 • heavy woven fabric retains a large number of gap portions, it has a cushioning property and a function of preventing the deformation of the cushioning material when the pressing is repeated. Since the use environment at the time of press molding requires a use time of 200 C or more and 80 minutes or so, there is no heat resistance on the right side, and the cushioning material cannot be reinforced and deformed. Further, if there is no void between the filaments, high cushioning properties are not exhibited. Therefore, it is a heat-resistant, high-strength, high-elastic fiber, and is a crimper. φ Further, a three-weave woven fabric, for example, as shown in Fig. 3, a warp yarn 9a, a warp yarn 9b, a warp yarn 9c, a warp yarn 9d, a warp yarn 9e, a warp yarn 9f, and a warp yarn 9g. Arranged in parallel, the outermost weft 8A is interlaced at the warp and the 4th of the 4f' intermediate layer is interlaced with the warp % and the second warp %, and the innermost weft 8C is interwoven It is formed by the structure of the line 9d. The three-weave woven fabric has a structure in which three weft threads 8A, 8B, and 8C are laminated. Further, the 4-weave woven fabric, for example, as shown in Fig. 4, has a warp 9a' warp 9b, a warp 9c, a warp 9d, a warp thread, a warp thread, and a warp thread. %, warp 9h, warp 9i, etc. are arranged in parallel, the outermost weft 8A is interlaced to the warp 9b and the sixth root 9h, and the second layer of weft 8B is interwoven between the warp and the fourth warp 9g The weft fastener of the third layer is formed by interlacing the warp % and the second root 9f, and the innermost weft 81 ) is interlaced with the warp %. * Re-weaving The fabric is a structure in which four wefts 8A, 8B, 8C, and 8D are laminated. The constituent wires of the above-mentioned woven fabric 5 are high-strength, high-elasticity and heat-resistant fibers such as polyaraminic amine fibers, pB〇 (polyphenylene bisazole) fibers, glass fibers, carbon fibers, and ceramic fibers. Examples thereof include inorganic fibers such as glass fibers, carbon fibers, and ceramic fibers. 106048.doc

• 12- l3?34〇6 The heat-resistant fiber member 2 forming the surface layer 3 is required to be used for the pressurization and the use time of about 8 G minutes. Therefore, if there is no heat resistance right, it will be thermally melted and dense. On the object. As the heat-resistant fibrous member 2, poly(tetra)amine fibers, pB〇 fibers, glass, carbon fibers, or m-fibers can be used, and a cloth, a nonwoven fabric, a woven fabric, a felt, or the like can be used. Further, the heat-resistant fibrous member 2 may be impregnated with a heat-resistant resin depending on the case. Examples of the heat resistant resin include an epoxy resin, a phenol resin, a melamine resin, a fluororesin, an unsaturated polyg resin, a sulphur oxide resin, a styrene resin, a thermosetting aristoyl resin, and a resin. A monomer (tetra) or a copolymer of a urea resin or a diene (tetra) phthalate resin or a copolymer. The simplification layer 7 is used to exhibit the cushioning property of the cushioning material, and has the heat resistance and the low shrinkage deformation property of the required characteristics, and the thickness is preferably (9).

The rubber hardness (JISA) is 65 to 85. . As the rubber used as the rubber layer 7, there are fluorine rubber and Shixia rubber. The fluororubber is a raw material containing a acrylate polymer, a vinylidene fluoride copolymer, or a fluorine-containing ruthenium rubber polyester rubber. In the rubber and rubber of the Dundee, as a vulcanizing agent, it can be used as a vulcanizing agent, a peroxyl H-propyl peroxide, a di-tert-butyl peroxide, a second butyl cumyl peroxide, and a second. Cumene peroxide '25 dimethyl-2,5-di (t-butylperoxy l. hexanyl-3, !, 3 bis (third butyl, its: oxy-isopropyl) Two kinds of peroxide-based vulcanizing agents such as benzene, di-butylperoxy_3,3,5·trimethylcyclohexane, hexamethylene amino carboxylic acid vinegar, n, n, · dicyano-green -1,6-hexanediamine, bisphenyl*AF, benzyltriphenylphosphonium sulfonium salt, etc. 106048.doc •13· 1373406-valent alcohol-based vulcanizing agent, and tri-ethyltetramine (ΤΕΤΑ), An amine-based vulcanizing agent such as triethylamine pentaamine or hexamethylenediamine (HMDA) can be used as a vulcanizing agent for fluororubbers. The amount of addition is 100 parts by mass relative to the polymer. It is preferably from 0.2 to 5.0 parts by mass, preferably from 5% to 3.0 parts by mass. Further, if necessary, it may contain a filler such as a filler, a plasticizer, a stabilizer, a processing aid, or a colorant, which is usually used for a rubber compound. Also, for rubber reinforcement, it can also be 1~10 mm staple fibers to 100 parts by mass of the rubber filler 5~30 parts by mass long as the short fibers, may be used, for example, under the trade name

Heat-resistant fibers such as Conex, Nomex, KEVLAR, Technora, and Twaron, such as polyarylamine fibers, PBO fibers, and glass fibers. [Examples] Example 1 A glass cloth (KS1600 manufactured by Kanebo Co., Ltd.) impregnated and cured with a heat-resistant epoxy resin was prepared as a heat-resistant fiber cloth treated with a heat-resistant resin, and was prepared by crimping. As a middle layer, a 2 woven fabric made of glass fiber (KS4325 from Kanebo Co., Ltd.) is used as a middle layer, and a rubber of a polyester clawing system (Vit〇n v9〇〇6 manufactured by DuPont) is prepared as a fluororubber. . The fluororubber was formed into a thin plate having a thickness of mm by a calender roll, laminated between the intermediate layer and the surface layer, and pressed at a temperature of 170 ° C for 15 minutes to form a cushioning material. The total thickness of the cushioning material is 2 1 〇 mm. The obtained cushioning material was measured at a surface pressure of 1 Torr and a surface pressure of 4 〇 kg/cm 2 in the form of a pressurized thickness 'measuring cushioning property (definition: compression ratio (%) = [(tliM40) / tl0] x 100, tl 〇 = The thickness of the sample at a load of 15 kg/cm2, t40 = the thickness of the sample at a load of 4 〇kg/cm2). As a result, the compression ratio was 106048.doc 1373406 11.3% 〇• Further, the obtained cushioning material was set at 2 〇〇t, and the result of pressurization was repeated for 40 minutes by pressing at 40 kg/cm2, and the i-th addition was performed. The thickness change after pressing! is 〇.〇3 mm, the thickness change after the 30th press is 〇〇5 mm, and the thickness change after the 200th press is 〇.〇8 mm. Example 2 A heat-resistant fiber treated with the same heat-resistant resin as in Example 1 and a 2 layer of 2 woven fabric prepared by crimping the same glass fiber as in Example 1 were prepared. Floor. Between the surface layer and the intermediate layer, between the intermediate layer, and between the intermediate layer and the surface layer, a fluororubber of a polycarbonate vulcanization system having a thickness of 〇〇3曰_ (Vh〇n V9 produced by DuPont) 6) and laminated, pressed to a temperature of 170. (:, the vulcanization was integrated in 15 minutes to prepare a cushioning material. The total thickness of the cushioning material was 2 26 mm. Then, the results of the compression ratio and the thickness variation were measured under the same conditions as in Example ,, and the compression ratio. For m, the thickness change after the first press is 0.05 mm, and the thickness change after the 30th calendar is 〇〇8 coffee, and the thickness change after the first press is 〇.1 In the present embodiment, it was found that the dust shrinkage ratio was substantially the same as that of the Example, and the cushioning property was maintained even when the amount of deflection was large. Comparative Example 1 Two weights of glass fibers formed by crimping instead of the intermediate layer A cushioning material was produced in the same manner as in Example 1 except that a woven fabric made of glass fibers which were not crimped was used, and the thickness of the cushioning material was the same as in Example i. Under the measurement of the shrinkage rate and thickness variation, the compression ratio is 6.4%, and the thickness change after the ith addition is ^106048.doc 15 1373406 is (MO nun, the thickness variation after the 30th twist is 〇ΐ7·. Comparative Example 2 Instead of the intermediate layer, a 2 woven fabric formed of glass fibers, and A cushioning material was produced in the same manner as in Example 1 except that a felt formed of polyaryleneamine fiber (Conex: Teijin Co., Ltd.) was used. The thickness of the cushioning material was 2·10 mme, and then it was the same as in Example 1. The compression ratio and the thickness change amount were measured under the conditions, and the compression ratio was 7.8%. The thickness change after the first press was 〇21, and the thickness change after φ 30th press was 0.30 mm, the 200th. The thickness change after the secondary press is 0.34 mm. Example 3 Preparation of Conex fabric (c〇191〇 produced by Teijin Co., Ltd.) as a heat-resistant fiber cloth of the surface layer, and 2-weaving of the glass fiber after crimping Cloth (KS4325 produced by Jidong Textile) as the intermediate layer, and the fluororubber of the polyol vulcanization system (Viton V9006 by DuPont) as the fluororubber. The intermediate layer is formed into two laminated structures. The fluororubber is used by the calender wheel. A sheet having a thickness of 0.30 mm is laminated between the intermediate layers, between the intermediate layer and the surface layer, and in the pressing, 'initial 5 minutes, at a temperature!", and the fluororubber portion is maintained in a non-pressurized state. Cross-linking, after which, with a face pressure of 2 〇Mpa, at a temperature of 165 C. The vulcanization was laminated and integrated for 15 minutes to prepare a cushioning material. The total thickness of the cushioning material was 3.15 mm. 0 The obtained cushioning material was measured for a surface pressure of 1 MPa and a surface pressure of 5 MPa. It is 0.55 mm and 0.95 mm. In addition, the obtained cushioning material is pressed into a surface pressure of 5 MPa, and it is heated from 5 〇〇c to 3 °C to 200 ° C, and kept at 200 ° C for 15 minutes. 3 minutes to cool down 106048.doc

• 16 · 1373406 to 5 (TC, in a state of no pressure) This mode is repeated 2 times. The deflection of 1 MPa and surface pressure of 5 MPa is 〇45 coffee and 〇6〇. Example 4 A cushioning material was produced in the same manner as in Example 3 except that the intermediate layer was a 4-weave woven fabric and the i-sheet was laminated. The buffer material having a thickness of 3 12 mme was a surface pressure of 1 MPa and a surface pressure of The amount of deflection at 5 MPa is 〇95 mm and 1.20 mm, respectively. The resulting cushioning material is placed in a state of 5 MPa, and the temperature is raised to 200 by the "seven cycles" (:, at 200. : After 15 minutes, the temperature was lowered to 50 C after 3 minutes, so that it was in a no-pressure state. The pattern was repeated 2 times, and the deflection amount at surface pressures of 1 MPa and 5 MPa was 〇55 mm& 〇65 melon claws. Comparative Example 3 The same material as in Example 3 was laminated, and the vulcanization was integrated by pressing surface pressure 2, 温度, temperature 165 ° C, and time for 15 minutes to prepare a cushioning material. It is 2.28 mm. The amount of deflection of the obtained cushioning material at a surface pressure of 1 Mpa and a surface pressure of 5 MPa is 〇〇5 mm& Comparative Example 4 A laminated structure similar to that of Example 4 except that a 4-weave woven fabric formed of glass fibers after crimping of the intermediate layer was used, and a 4-weave woven fabric formed of unfolded glass fibers was used. The vulcanization material was prepared by pressing the surface pressure 2 to the river at a temperature of 16 YC for 15 minutes. The thickness of the cushioning material was 2.45 mm. The obtained cushioning material had a surface pressure of 1 Μρ & The amount of deflection at 5 MPa is 0.21 mm and 0.35 mm, respectively. Comparative Example 5 106048.doc •17· 丄J/J4U0 Instead of the intermediate layer, the 4-weave woven fabric formed of glass fiber is used by the meta-system. A cushioning material was produced in the same manner as in Example 4 except that the felt was formed of a poly-branched amine fiber. The cushioning material obtained by the thickness of the cushioning material was 2.10 mme, and the amount of deflection of the cushioning material was 5 MPa, and the surface dust was 5 MPa. For the sake of 贿23 bribes and 〇43. [Industrial use possibilities]

The heat-resistant pressing cushioning material of the present invention is a cushioning material which prevents the enthalpy of the hot-pressed disc from being formed between the hot-pressed disc and the molded article at the time of pressurization formation, and which imparts pressure and heat to the uniform sentence. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing a heat-resistant pressing cushioning material obtained by the method of the present invention. Fig. 2 is a cross-sectional view showing a heat-resistant pressing cushioning material of another embodiment produced by the method of the present invention. Figure 3 is a schematic view of a 3 heavy woven fabric. Figure 4 is a schematic view of a 4 heavy woven fabric.

[Main component symbol description] 1 Heat-resistant pressing buffer 2 Heat-resistant fiber member 3 Wide surface 5 Multi-woven fabric 6 Intermediate layer 7 Rubber layer 8 Weft line 9 Warp 106048.doc

Claims (1)

Patent Application No. 094,141,786, the scope of application for the Chinese patent application (April 101) 〇a X. Patent application scope: A cushioning material for heat-resistant twin pressing is used between a hot pressed disk and a molded article, j 4 Shidan is characterized in that at least one layer of bulky multi-woven fabric is used as its constituent member, and the constituent thread of the multi-woven fabric comprises a crimping processing line. 2. The heat-resistant pressing cushioning material according to the item 1, wherein the surface layer is provided with a resistant fiber member, and one or two layers of the multi-woven fabric are provided on the intermediate layer, and the rubber layer is interposed between the surface layer and the surface layer. Between intermediate layers or between intermediate layers. 3. The heat-resistant pressing cushioning material according to item 1 of the above, wherein the multi-woven fabric is a 2-weaving fabric to a 4-weave woven fabric. 4. The heat-resistant pressing cushioning material according to item 2, wherein the multi-woven fabric is a 2-weaving fabric to a 4-weave woven fabric. The heat-resistant pressing cushioning material according to any one of claims 1 to 4, wherein the constituent thread of the multi-woven U-cloth is selected from the group consisting of at least one of glass fibers, carbon fibers, and ceramic fibers. 6. The heat-resistant pressing cushioning material according to item 2, wherein the heat-resistant fibrous member of the surface layer is at least one selected from the group consisting of aromatic polyamide fibers, polyphenylene sulfide fibers, glass fibers, and carbon fibers. Heat fiber composition. The heat-resistant pressing cushioning material according to claim 2, wherein the heat-resistant fibrous member of the surface layer is composed of short fibers of aromatic polyamine fibers. 8. The heat-resistant pressing cushioning material according to any one of claims 2, 6 and 7, wherein the heat-resistant fiber member of the surface layer is treated with a heat-resistant resin. 9. The heat-resistant pressing cushioning material according to claim 2, wherein the rubber layer is selected from the group consisting of fluorine 106048-10I0413.doc 1373406 ίο. 11. 12. at least one of rubber and enamel rubber. The heat-resistant pressing cushioning material according to claim 2 or 9, which is interposed between the surface layer and the intermediate layer or between the intermediate layers by a short fiber-reinforced rubber layer. A method for producing a heat-resistant pressing buffer which is used between a hot-pressed disk and a molded article, wherein the method comprises: applying a heat-resistant fiber member to the surface layer, and providing at least one layer in the intermediate layer A multi-woven fabric of lotus-like type, wherein a laminate is formed between the surface layer and the intermediate layer and/or between the intermediate layers via an unvulcanized rubber layer, and the laminate is placed under pressure without pressure. Immediately after the crosslinking reaction of the rubber layer is started, the pressure, vulcanization, and lamination are integrated. The method for producing a heat-resistant pressing cushioning material according to claim 11, wherein the laminate is at a temperature of from 150 ° C to 180 °. (:, after being placed in a pressureless state for 02 to 15 minutes, it is pressurized, vulcanized, and laminated and integrated while maintaining the temperature. 106048-1010413.doc