Composite silica gel block, composite cloth and preparation method and application thereof
Through the preparation method of combining foamed silicone and microspheres, the problems of large weight, poor adhesion and impermeability of silicone in upper or sole applications are solved, and lightweight, breathability and structural stability are achieved, and there is obvious 3D three-dimensional structure and cushioning effect.
Patent Information
- Application Number
- CN202510623290.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-15
- Publication Date
- 2025-08-12
AI Technical Summary
Existing silicone has problems such as high weight, poor adhesion, impermeability and limited cushioning effect in upper or sole applications.
Silicone blocks are prepared by combining foamed silicone and foamed microspheres. Silicone blocks with pore structure are formed by foaming them through two pressing dies, and combined with the fabric to avoid penetration and movement of silicone by using physical fixation.
It achieves lightweight, breathability and structural stability. The silicone block is not easy to move on the fabric and has obvious 3D three-dimensional structure and buffering functions.
Smart Images
Figure CN120464007A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of textiles, and in particular to a composite silica gel block, a composite cloth, and a preparation method and application thereof. Background Art
[0002] Silicone is soft and resilient, and a shoe upper with a silicone cushioning layer provides cushioning and good rebound. During intense exercise or significant impact, a thick silicone cushioning layer can effectively reduce damage to the foot, while still allowing the upper to recover.
[0003] Insoles or soles containing a silicone layer can also effectively absorb the impact force during walking or running through the resilience of silicone, reducing joint pressure.
[0004] At present, silicone is usually added to the upper, sole, or insole of a shoe by bonding the silicone layer with glue. However, silicone is heavy, has fewer surface active groups, and has poor adhesion, making it easy to fall off during activities. Alternatively, silicone liquid is applied to the surface of the fabric and then molded to form a silicone coating. However, this treatment method causes the liquid silicone to penetrate into the fabric fibers, making the fabric airtight. In addition, the thickness of the silicone layer formed is limited, and the cushioning is also limited. Summary of the Invention
[0005] In response to the above issues, the present application provides a breathable, stable, lightweight composite silicone block, fabric, and its preparation method and application. The composite silicone block is made from foamed silicone microspheres, resulting in a lightweight design. Furthermore, the silicone block is physically secured to the fabric, making it less likely to move. The fabric itself is breathable, and the thickness of the silicone is adjustable.
[0006] The first aspect of the present application provides a method for preparing a composite silica gel block, comprising the following steps: preparing a slurry: mixing polysiloxane, modified azodicarbonamide, zinc oxide, hydrogenated silicone oil, expanded microspheres, silicon dioxide, a platinum catalyst, and a stabilizer to obtain a silica gel microsphere slurry;
[0007] Slurry foaming: pouring the silica gel microsphere slurry into a mold, performing hot pressing and cold pressing for the first time to perform silica gel foaming molding; then heating the mold, performing hot pressing and cold pressing for the second time to perform microsphere foaming molding; and obtaining a composite silica gel block.
[0008] During the research, the applicant found that due to the heavy weight of silica gel, when using conventional silica gel to prepare silica gel blocks, the weight is too large and not conducive to subsequent use; and when using foamed silica gel to prepare silica gel blocks, due to its porous structure, it is easy for water or impurities to enter.
[0009] Unlike existing technologies, this method uses a slurry through two compression molding processes at different temperatures to create a silicone block composed of foamed silicone and foamed microspheres. The initial foaming of the slurry creates a porous silicone foam. The secondary microsphere foaming fills the pores of the foamed silicone and the unfilled areas within the mold, resulting in a lightweight silicone block with adjustable thickness.
[0010] Furthermore, the silica gel microsphere slurry includes the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of hydrophobic silica, 0.05-0.1 parts by mass of platinum catalyst, and 1.0-2.0 parts by mass of stabilizer.
[0011] Furthermore, in the first hot pressing and cold pressing, the hot pressing temperature is 90-110° C. and the time is 60-80 seconds; the cold pressing temperature is 0-10° C. and the time is 30-40 seconds.
[0012] Furthermore, in the secondary hot pressing and cold pressing, the hot pressing temperature is 150-170° C. and the time is 80s-120s; the cold pressing temperature is 0-10° C. and the time is 30-40s.
[0013] The second aspect of the present application provides a composite silica gel block, which is prepared using the preparation method described in the first aspect of the present application.
[0014] A third aspect of the present application provides a method for preparing a composite fabric, comprising the following steps:
[0015] S1: Processing the surface base fabric according to the set size to obtain a surface fabric with first holes;
[0016] S2: The mesh fabric is fixed at a predetermined position in a first concave mold, hot-pressed at 120-150°C for 40-60 seconds, and then cold-pressed at 0-10°C for 30-40 seconds to form a predetermined intermediate layer having a raised structure; the bottom of the raised structure has the same size and shape as the first hole;
[0017] S3: Pour the silica gel microsphere slurry into the second concave mold, hot press at 90-110°C for 60-80s, and then cold press at 0-10°C for 30-40s to perform silica gel foaming molding; then heat the mold, hot press at 150-170°C for 80s-120s, and then cold press at 0-10°C for 30-40s to perform microsphere foaming molding; obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protruding structure; the silica gel microsphere slurry comprises the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of hydrophobic silica, 0.05-0.1 parts by mass of platinum catalyst, and 1.0-2.0 parts by mass of stabilizer;
[0018] S4: Laying the surface layer, placing the first concave mold below the surface layer, and aligning the opening of the first concave mold with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; then laying the pre-shaped intermediate layer, passing the protruding structure of the pre-shaped intermediate layer through the first hole and placing it in the first concave mold; then filling the first concave mold with the composite silicone block; then laying the second hot melt adhesive film, which has the same shape and size as the bottom layer fabric; finally, laying the bottom layer to obtain a multi-layer fabric;
[0019] S5: hot pressing the multi-layer fabric at 120-150° C. for 50s-70s and then cold pressing at 0-10° C. for 30-40s to form the composite fabric.
[0020] S3 is a silicone block composed of expanded silicone and expanded microspheres, produced by foaming the slurry through two compression molding processes at different temperatures. The initial foaming of the slurry creates a porous silicone foam, while the secondary microsphere foaming fills the pores and unfilled areas within the mold. This contributes to the lightweight nature of the S3 silicone block. The dried silicone is heat-resistant, so when S4 wraps and bonds the silicone block with the pre-formed middle layer and base fabric, the heat prevents the silicone from melting and penetrating the middle and base fabrics. This preserves the breathable mesh structure.
[0021] Different from the existing technology, this application uses compression molding to prepare the raised structure mesh shell and filler silicone blocks to avoid the combination of silicone liquid and mesh fabric, and the silicone penetrating into the mesh structure fibers to cause airtightness; the silicone block is composed of foamed silicone and foamed microspheres and has the characteristics of lightweight; the silicone block is physically fixed, and the silicone block does not move on the fabric, and has structural stability; the size and height of the raised structure can be achieved by adjusting the size of the mold as needed, and the fabric as a whole is breathable.
[0022] Furthermore, the surface layer also has second holes of a set size.
[0023] A fourth aspect of the present application provides a composite fabric, which is prepared using the preparation method described in the third aspect of the present application.
[0024] Unlike existing fabrics, the composite fabric in this application features lightweight silicone blocks embedded within the raised structure. These blocks are secured by the middle and bottom fabric layers, preventing movement and providing excellent stability and lightweight performance. Furthermore, the silicone cover is a pre-shaped mesh fabric structure, providing breathability. The raised structure creates a distinct 3D structure, enhancing the visual impact.
[0025] The fifth aspect of the present application provides a sports shoe, the upper of which is made of the composite fabric provided in the fourth aspect of the present application.
[0026] Unlike existing technologies, this invention physically secures the silicone block to the upper, preventing it from moving on the fabric and ensuring structural stability. The size and height of the raised structure can be adjusted by adjusting the mold dimensions as needed. The raised structure is positioned in a designed location on the upper, creating a distinct 3D structure and achieving a more visually striking appearance. The silicone block within the structure also effectively protects against impact damage and maintains its lightweight construction.
[0027] The sixth aspect of the present application provides a pair of sports shoes, the insole and / or sole of which are made of the silicone fabric described in the fourth aspect of the present application.
[0028] Unlike existing technologies, the insole and sole of this application physically secure the silicone block, preventing it from moving on the fabric and ensuring structural stability. The size and height of the raised structure can be adjusted according to the mold size. The raised structure has a distinct 3D structure, effectively supporting the arch of the foot and providing cushioning while remaining lightweight.
[0029] The above-mentioned records related to the invention content are only an overview of the technical solution of this application. In order to enable ordinary technicians in this field to more clearly understand the technical solution of this application, and then implement it according to the written contents of the specification, and to make the above-mentioned purposes and other purposes, features and advantages of this application easier to understand, the following is an explanation in combination with the specific implementation methods and drawings of this application. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of this application and other related contents, and are not to be considered as limiting this application.
[0031] In the drawings of the specification:
[0032] Figure 1 Schematic diagram of the composite fabric structure prepared in Example 2. DETAILED DESCRIPTION
[0033] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.
[0034] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.
[0035] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0036] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.
[0037] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.
[0038] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.
[0039] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.
[0040] A first aspect of the present application provides a method for preparing a composite silica gel block, comprising the following steps: preparing a slurry: mixing polysiloxane, modified azodicarbonamide, zinc oxide, hydrogenated silicone oil, expanded microspheres, hydrophobic silica, a platinum catalyst, and a stabilizer to obtain a silica gel microsphere slurry;
[0041] Slurry foaming: pouring the silica gel microsphere slurry into a mold, performing hot pressing and cold pressing for the first time to perform silica gel foaming molding; then heating the mold, performing hot pressing and cold pressing for the second time to perform microsphere foaming molding; and obtaining a composite silica gel block.
[0042] Polysiloxane, one of the main film-forming substances in the coating, has excellent flexibility and high strength. As the main material of the foaming system, it provides flexibility and mechanical strength, forming the main body and skeleton of the composite silicone block.
[0043] Modified azodicarbonamide decomposes under heating to produce nitrogen and other gases, causing the mixture to expand and foam. Zinc oxide acts as a catalyst to lower the decomposition temperature of azodicarbonamide. Hydrogenated silicone oil cross-links with polysiloxane to form a three-dimensional network structure, enhancing the stability and strength of the foam. Hydrophobic silica interacts with polysiloxane to enhance the overall performance of the silicone, improving its wear resistance and tensile strength. Platinum catalysts accelerate the cross-linking reaction between polysiloxane and hydrogenated silicone oil, ensuring a smooth cross-linking process. Stabilizers inhibit aging and degradation of silicone rubber during the foaming process and use, extending the product's service life.
[0044] During the research, the applicant found that due to the heavy weight of silica gel, when using conventional silica gel to prepare silica gel blocks, the weight is too large, which is not conducive to subsequent use; and when using foamed silica gel to prepare silica gel blocks, due to its porous structure, it is easy for water or impurities to enter, so a combination of foamed microspheres and foamed silica gel was adopted.
[0045] Unlike existing technologies, this method produces a silicone block composed of foamed silicone and foamed microspheres by foaming the slurry twice within a mold at different temperatures. The initial foaming of the slurry produces a porous silicone foam, while the secondary microsphere foaming fills the pores of the foamed silicone and the unfilled areas within the mold, resulting in a lightweight silicone block.
[0046] Furthermore, the silica gel microsphere slurry includes the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of silicon dioxide, 0.05-0.1 parts by mass of platinum catalyst, and 1.0-2.0 parts by mass of stabilizer.
[0047] Furthermore, in the first hot pressing and cold pressing, the hot pressing temperature is 90-110° C. and the time is 60-80 seconds; the cold pressing temperature is 0-10° C. and the time is 30-40 seconds.
[0048] Furthermore, in the secondary hot pressing and cold pressing, the hot pressing temperature is 150-170° C. and the time is 80s-120s; the cold pressing temperature is 0-10° C. and the time is 30-40s.
[0049] The second aspect of the present application provides a composite silica gel block, which is prepared using the preparation method described in the first aspect of the present application.
[0050] A third aspect of the present application provides a method for preparing a composite fabric, comprising the following steps:
[0051] S1: Processing the surface base fabric according to the set size to obtain a surface fabric with first holes;
[0052] S2: The mesh fabric is fixed at a predetermined position in a first concave mold, hot-pressed at 120-150°C for 40-60 seconds, and then cold-pressed at 0-10°C for 30-40 seconds to form a predetermined intermediate layer having a raised structure; the bottom of the raised structure has the same size and shape as the first hole;
[0053] S3: Pour the silica gel microsphere slurry into the second concave mold, hot press at 90-110°C for 60-80s, and then cold press at 0-10°C for 30-40s to perform silica gel foaming molding; then heat the mold, hot press at 150-170°C for 80s-120s, and then cold press at 0-10°C for 30-40s to perform microsphere foaming molding; obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protruding structure; the silica gel microsphere slurry comprises the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of hydrophobic silica, 0.05-0.1 parts by mass of platinum catalyst, and 1.0-2.0 parts by mass of stabilizer;
[0054] S4: Laying the surface layer, placing the first concave mold below the surface layer, and aligning the opening of the first concave mold with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; then laying the pre-shaped intermediate layer, passing the protruding structure of the pre-shaped intermediate layer through the first hole and placing it in the first concave mold; then filling the first concave mold with the composite silicone block; then laying the second hot melt adhesive film, which has the same shape and size as the bottom layer fabric; finally, laying the bottom layer to obtain a multi-layer fabric;
[0055] S5: hot pressing the multi-layer fabric at 120-150° C. for 50s-70s and then cold pressing at 0-10° C. for 30-40s to form the composite fabric.
[0056] S3 produces a silicone block composed of expanded silicone and expanded microspheres through two foaming steps at different temperatures. The initial foaming of the slurry creates a porous silicone block, while the secondary microsphere foaming fills the pores and unfilled areas within the mold. This results in a lightweight silicone block. The dried silicone is heat-resistant, so when S4 wraps and bonds the silicone block with a pre-formed middle layer and base fabric, the heat prevents the silicone block from melting and penetrating the middle and base fabrics. This preserves the breathable mesh structure.
[0057] Unlike existing technologies, this application uses a mold to create the raised mesh shell and filler silicone blocks, preventing the silicone liquid from bonding with the mesh fabric and causing silicone to penetrate into the mesh fibers, resulting in airtightness. The silicone blocks are composed of foamed silicone and foamed microspheres, making them lightweight. Physically securing the silicone blocks prevents movement on the fabric, ensuring structural stability. The size and height of the raised structures can be adjusted by adjusting the mold dimensions as needed. Furthermore, the fabric as a whole is breathable.
[0058] Furthermore, the surface layer also has second holes of a set size.
[0059] A fourth aspect of the present application provides a composite fabric, which is prepared using the preparation method described in the third aspect of the present application.
[0060] Different from the existing technology, the raised structure of the composite fabric of this application is equipped with a lightweight silicone block, which is fixed in the middle layer and the bottom layer of fabric and does not move. It has good stability and light weight. The silicone is covered with a pre-shaped mesh structure fabric, which is breathable.
[0061] The fifth aspect of the present application provides a sports shoe, the upper of which is made of the composite fabric provided in the fourth aspect of the present application.
[0062] Unlike existing technologies, this invention physically secures the silicone block to the upper, preventing it from moving on the fabric and ensuring structural stability. The size and height of the raised structure can be adjusted by adjusting the mold dimensions as needed. The raised structure is positioned at a designed location on the upper, creating a distinct 3D structure that creates a more visually striking appearance. The silicone block within the structure also effectively protects against impact damage and maintains its lightweight construction.
[0063] The sixth aspect of the present application provides a pair of sports shoes, the insole and / or sole of which are made of the silicone fabric described in the fourth aspect of the present application.
[0064] Unlike existing technologies, the insole or sole of this application physically secures the silicone block, preventing it from moving on the fabric and ensuring structural stability. The size and height of the raised structure can be customized by adjusting the mold dimensions. The raised structure has a distinct 3D structure, providing cushioning while remaining lightweight.
[0065] In this embodiment, the vinyl polysiloxane is RH-Vi303 from Zhejiang Runhe Silicone New Materials Co., Ltd.; the modified azodicarbonamide is AC-01 from Asia Chemical; the zinc oxide is from Shandong Xingya New Materials Co., Ltd.; the hydrogen-containing silicone oil is RH-H33 from Zhejiang Runhe Silicone New Materials Co., Ltd.; the expanded microspheres are 909DU80 from Nouryon; the hydrophobic silica is R812S from Evonik Chemical Co., Ltd. of Germany; the platinum catalyst is KE-07 from Shin-Etsu of Japan; and the stabilizer is TS-05 from Dow Chemical of the United States.
[0066] In this embodiment, the mold pressure is set to 8 MPa.
[0067] Example 1 A composite silica gel block and composite fabric
[0068] S0: preparing a silica microsphere slurry: mixing 100 parts by mass of vinyl polysiloxane, 5 parts by mass of azodicarbonamide, 0.32 parts by mass of zinc oxide, 2 parts by mass of hydrogenated silicone oil, 1 part by mass of expanded microspheres, 5 parts by mass of silicon dioxide, 0.09 parts by mass of a catalyst, and 1.0 parts by mass of a stabilizer to obtain the silica microsphere slurry (with an expansion ratio of about 3);
[0069] S1: Processing the surface base fabric according to the set size to obtain a surface fabric having a first hole and a second hole;
[0070] S2: The polyester mesh yarn is fixed at a predetermined position in the first concave mold, and then subjected to hot pressing and cold pressing (hot pressing conditions: 145°C, 40 seconds, pressure 8 MPA; cold pressing conditions: 5°C, 32 seconds, pressure 8 MPA) to obtain a predetermined shaped intermediate layer having a raised structure; the bottom size and shape of the raised structure are the same as those of the first hole;
[0071] S3: The silica gel microsphere slurry is applied to the second concave mold (36% of the volume), and the silica gel foaming is performed by hot pressing at 100°C for 60 seconds at a pressure of 8 MPA, followed by cold pressing at 5°C for 32 seconds; the mold is then heated, hot pressed at 150°C for 90 seconds, followed by cold pressing at 5°C for 40 seconds to foam the microspheres to obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protrusion structure;
[0072] S4: Laying the surface layer, placing the first concave mold below the surface layer, and aligning the opening of the first concave mold with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; then laying the pre-shaped intermediate layer, passing the protruding structure of the pre-shaped intermediate layer through the first hole and placing it in the first concave mold; then filling the first concave mold with the composite silicone block; then laying the second hot melt adhesive film, which has the same shape and size as the bottom layer fabric; finally, laying the bottom layer to obtain a multi-layer fabric;
[0073] S5: The multi-layer fabric is hot-pressed at 130°C for 65 seconds and then cold-pressed at 5°C for 38 seconds to form the composite fabric. The composite fabric comprises, from bottom to top, a base layer, a polyester mesh middle layer, and a surface layer. The composite fabric has a raised portion extending through the first hole in the surface layer. The surface of the raised portion is a polyester mesh outer shell, the interior is a composite silicone block, and the bottom portion is the base layer. The second hole in the composite fabric allows the polyester mesh layer to be seen.
[0074] Example 2 A composite silica gel block and composite fabric
[0075] S0: preparing a silica microsphere slurry: mixing 100 parts by mass of vinyl polysiloxane, 8 parts by mass of azodicarbonamide, 0.64 parts by mass of zinc oxide, 2.5 parts by mass of hydrogenated silicone oil, 2 parts by mass of expanded microspheres, 6 parts by mass of silicon dioxide, 0.07 parts by mass of a catalyst, and 1.5 parts by mass of a stabilizer to obtain the silica microsphere slurry (with an expansion ratio of about 4);
[0076] S1: Processing the surface base fabric according to the set size to obtain a surface fabric with first holes;
[0077] S2: The polyester MONO yarn is fixed at a predetermined position in a first concave mold and then subjected to hot pressing and cold pressing (hot pressing conditions: 135°C, 46 seconds, pressure 8 MPA; cold pressing conditions: 5°C, 32 seconds, pressure 8 MPA) to obtain a predetermined shaped intermediate layer having a raised structure; the bottom of the raised structure has the same size and shape as the first hole;
[0078] S3: The silica gel microsphere slurry is applied to the second concave mold (28% by volume), and the mold is subjected to hot pressing at 105°C for 70 seconds at a pressure of 8 MPA, followed by cold pressing at 5°C for 32 seconds to perform silica gel foaming molding; the mold is then heated, hot pressed at 160°C for 102 seconds, followed by cold pressing at 5°C for 40 seconds to perform microsphere foaming molding to obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protrusion structure;
[0079] S4: Laying the surface layer, placing the first concave mold below the surface layer, and aligning the opening of the first concave mold with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; then laying the pre-shaped intermediate layer, passing the protruding structure of the pre-shaped intermediate layer through the first hole and placing it in the first concave mold; then filling the first concave mold with the composite silicone block; then laying the second hot melt adhesive film, which has the same shape and size as the bottom layer fabric; finally, laying the bottom layer to obtain a multi-layer fabric;
[0080] S5: hot pressing the multi-layer fabric at 130°C for 65 seconds and then cold pressing at 5°C for 38 seconds to obtain the composite fabric. Figure 1 As shown, from bottom to top, it includes a bottom layer, a polyester MONO yarn layer and a surface layer; there is a raised portion on the composite fabric, and the raised portion passes through the first hole portion of the surface layer; the surface of the raised portion is a polyester mesh outer shell, the inside is a composite silicone block, and the bottom is the bottom layer.
[0081] Example 3 A composite silica gel block and composite fabric
[0082] S0: preparing a silica microsphere slurry: mixing 100 parts by mass of vinyl polysiloxane, 10 parts by mass of azodicarbonamide, 0.95 parts by mass of zinc oxide, 3 parts by mass of hydrogenated silicone oil, 3 parts by mass of expanded microspheres, 8 parts by mass of silicon dioxide, 0.05 parts by mass of a catalyst, and 2 parts by mass of a stabilizer to obtain the silica microsphere slurry (with an expansion ratio of about 5);
[0083] S1: Processing the surface base fabric according to the set size to obtain a surface fabric with first holes;
[0084] S2: The polyester MONO yarn is fixed at a predetermined position in a first concave mold and then subjected to hot pressing and cold pressing (hot pressing conditions: 135°C, 46 seconds, pressure 8 MPA; cold pressing conditions: 5°C, 32 seconds, pressure 8 MPA) to obtain a predetermined shaped intermediate layer having a raised structure; the bottom of the raised structure has the same size and shape as the first hole;
[0085] S3: The silica gel microsphere slurry is applied to the second concave mold (23% by volume), and the silica gel foaming is performed by hot pressing at 105°C for 80 seconds at a pressure of 8 MPA, followed by cold pressing at 5°C for 32 seconds; the mold is then heated, hot pressed at 170°C for 110 seconds, followed by cold pressing at 5°C for 40 seconds to foam the microspheres, to obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protrusion structure;
[0086] S4: Laying the surface layer, placing the first concave mold below the surface layer, and aligning the opening of the first concave mold with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; then laying the pre-shaped intermediate layer, passing the protruding structure of the pre-shaped intermediate layer through the first hole and placing it in the first concave mold; then filling the first concave mold with the composite silicone block; then laying the second hot melt adhesive film, which has the same shape and size as the bottom layer fabric; finally, laying the bottom layer to obtain a multi-layer fabric;
[0087] S5: hot pressing the multi-layer fabric at 130°C for 65 seconds and then cold pressing at 5°C for 38 seconds to obtain the composite fabric. Figure 1 As shown, from bottom to top, it includes a bottom layer, a polyester MONO yarn layer and a surface layer; there is a raised portion on the composite fabric, and the raised portion passes through the first hole portion of the surface layer; the surface of the raised portion is a polyester mesh outer shell, the inside is a composite silicone block, and the bottom is the bottom layer.
[0088] The composite silica gel blocks prepared in Examples 1-3 were subjected to the following performance tests, and the results are shown in Table 1 below:
[0089] Table 1 Test results of composite silica gel block
[0090]
[0091] The test results show:
[0092] 1. The composite silicone block has a relatively low density and is lighter than conventional silicone in the same volume, so the overall composite fabric also achieves a lightweight effect;
[0093] 2. The composite silicone block has low hardness, which can achieve better softness, increase touch and cushioning effect;
[0094] 3. Constant temperature and humidity testing and aging are normal, which solves the problem of poor polyurethane foaming performance and achieves high performance of the overall composite fabric during transportation, storage and use.
[0095] Therefore, this technical solution uses a mold to produce composite silicone fabric from composite silicone blocks. This fabric is breathable, stable, and lightweight. The silicone blocks can be designed into any shape and provide sufficient support and cushioning in the designed position. This composite silicone fabric is suitable for making uppers, insoles, and soles for sports shoes.
[0096] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. A method for preparing a composite silica gel block, characterized in that: The following steps are involved: Prepare slurry: mix polysiloxane, modified azodicarbonamide, zinc oxide, hydrogenated silicone oil, expanded microspheres, hydrophobic silica, platinum catalyst, and stabilizer to obtain silica microsphere slurry; Slurry foaming: pouring the silica gel microsphere slurry into a mold, performing hot pressing and cold pressing for the first time to perform silica gel foaming molding; then heating the mold, performing hot pressing and cold pressing for the second time to perform microsphere foaming molding; and obtaining a composite silica gel block.
2. The composite silica gel block according to claim 1, characterized in that: The silica gel microsphere slurry includes the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of hydrophobic silica, 0.05-0.1 parts by mass of a platinum catalyst, and 1.0-2.0 parts by mass of a stabilizer.
3. The composite silica gel block according to claim 2, characterized in that: In the first hot pressing and cold pressing, the hot pressing temperature is 90-110° C. and the time is 60-80 seconds; the cold pressing temperature is 0-10° C. and the time is 30-40 seconds.
4. The composite silica gel block according to claim 2, characterized in that: In the secondary hot pressing and cold pressing, the hot pressing temperature is 150-170° C. and the time is 80s-120s; the cold pressing temperature is 0-10° C. and the time is 30-40s.
5. A composite silica gel block, characterized in that: The composite silica gel block is prepared by the preparation method according to any one of claims 1 to 4.
6. A method for preparing a composite fabric, characterized in that: The following steps are involved: S1: Processing the surface base fabric according to the set size to obtain a surface fabric with first holes; S2: The mesh fabric is fixed at a predetermined position in a first concave mold, hot-pressed at 120-150°C for 40-60 seconds, and then cold-pressed at 0-10°C for 30-40 seconds to form a predetermined intermediate layer having a raised structure; the bottom of the raised structure has the same size and shape as the first hole; S3: Pour the silica gel microsphere slurry into the second concave mold, hot press at 90-110°C for 60-80s, and then cold press at 0-10°C for 30-40s to perform silica gel foaming molding; then heat the mold, hot press at 150-170°C for 80s-120s, and then cold press at 0-10°C for 30-40s to perform microsphere foaming molding; obtain a composite silica gel block; the composite silica gel block is adapted to the hollow inner cavity of the protruding structure; the silica gel microsphere slurry comprises the following components in parts by mass: 80-110 parts by mass of vinyl polysiloxane, 5-10 parts by mass of modified azodicarbonamide, 0.1-1 parts by mass of zinc oxide, 2-3 parts by mass of hydrogenated silicone oil, 1-3 parts by mass of expanded microspheres, 5-8 parts by mass of hydrophobic silica, 0.05-0.1 parts by mass of platinum catalyst, and 1.0-2.0 parts by mass of stabilizer; S4: Laying the surface layer, placing the first concave mold below the surface layer, with the opening of the first concave mold aligned with the first hole of the surface layer; then laying the first hot melt adhesive film, which has the same shape and size as the surface layer fabric; Then, a pre-shaped middle layer is laid, and the raised structure of the pre-shaped middle layer is passed through the first hole and placed in the first concave mold; the composite silicone block is then filled into the first concave mold; then, a second hot melt adhesive film is laid, and the second hot melt adhesive film has the same shape and size as the bottom layer of fabric; finally, the bottom layer is laid to obtain a multi-layer fabric; S5: hot pressing the multi-layer fabric at 120-150° C. for 50s-70s and then cold pressing at 0-10° C. for 30-40s to form the composite fabric.
7. The preparation method according to claim 6, characterized in that The surface layer also has second holes of a set size.
8. A composite fabric, characterized in that: The composite fabric is prepared using the preparation method according to claim 6 or 7.
9. A sports shoe, characterized in that: The upper of the sports shoe is made of the composite fabric according to claim 8.
10. A sports shoe, characterized in that: The insole and / or sole of the sports shoe uses the composite fabric according to claim 8.