Elastomer material of medium-free composite fabric

Abstract

The invention discloses an elastomer material of a medium-free composite fabric, which belongs to the field of high polymer materials and comprises the following main materials in percentage by weight: 2-98% of thermoplastic polyamide elastomer, 2-98% of thermoplastic silica gel elastomer and 0-7% of compatibilizer. The thermoplastic polyamide elastomer is a block copolymer composed of rigid polyamide and flexible polyether or polyester blocks, and the thermoplastic silica gel elastomer is an elastomer formed by vulcanizing silicone rubber through a dynamic vulcanization method and uniformly dispersing the vulcanized silicone rubber in a polyurethane matrix. The compatibilizer is a copolymer of maleic anhydride grafted olefin or a segmented copolymer of polyurethane polyamide. According to the invention, the elastomer material is fused and permeates into the fiber pores of the fabric to realize firm combination with the fabric, so that the risk of chemical medium residue is eliminated from the source, no additive needs to be additionally added in the coating process, the pollution in the production link is reduced, and the subsequent fabric treatment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of polymer materials, and more particularly to an elastomer material for a medium-free laminated fabric. Background Technology

[0002] In traditional textile fabric lamination technology, solvent-based adhesives, PUR hot melt adhesives, and other media are typically used to bond the film to the fabric. For example, existing technologies using polyamide (nylon), silicone, or PTFE as lamination materials have the following drawbacks:

[0003] Polyamide materials: Ordinary polyamide (nylon) has a high melting point (Nylon 10 has the lowest melting point at 175℃; Nylon 11 has a melting point of 186℃). If heated and melted to be laminated with fabric, it will exceed the temperature that conventional textile fabrics can withstand. Conventional textile fabrics will harden, shrink, or yellow and char if the temperature exceeds 180℃. Furthermore, the resulting film has high hardness, a stiff feel, poor elasticity, and lacks practical performance for laminating with fabrics.

[0004] Silicone rubber materials: Ordinary silicone rubber has low tensile and tear strength, is easy to break, and is a non-thermoplastic material that is difficult to process through melt penetration process. It has poor adhesion to fabrics and requires glue or PUR hot melt adhesive to bond with the fabric. It also has poor peel strength. Industrial silicone rubber film-coated fabrics are rarely seen and have low practical value.

[0005] PTFE material: It is a common lamination material for outdoor jackets. PTFE has poor thermoplastic properties and its melting point is generally above 310℃ (the melting temperature of POLYFLON M-111 from Daikin Fluorochemicals in Japan is 324℃). It is not suitable for lamination with textile fabrics by melt penetration. It requires the use of glue or PUR hot melt adhesive to bond with the fabric. The composite fabric is thick and heavy, has low peel strength, and the breathability and flexibility of the laminated fabric are reduced.

[0006] The drawbacks of compounding ordinary polyamides with silicone materials: polyamides are highly polar, while silicone is too weakly polar, resulting in a lack of compatibility. Only with 10% or more compatibilizers can they be properly compounded. Therefore, this invention does not use ordinary polyamides (nylon) and silicone rubber. This invention uses thermoplastic polyamide elastomers and thermoplastic silicone elastomers. By introducing polyester or polyether soft segments into thermoplastic polyamide elastomers, the polarity is reduced, and by introducing polyurethane into thermoplastic silicone elastomers, the polarity of the two elastomers is brought closer together, enhancing their compatibility and reducing the amount of compatibilizer needed. For elastomer models with low blending ratios and similar polarities, compatibilizers can be omitted. Therefore, thermoplastic polyamide elastomers and thermoplastic silicone elastomers are chosen. Summary of the Invention

[0007] To overcome the above problems, this invention aims to propose an elastomer material for medium-free laminated fabrics. The purpose is to solve the problems of existing laminated materials that rely on a medium, have poor adhesion, insufficient processability, and limited functionality, and to ensure the compatibility of the laminated elastomers. The laminated elastomer material meets the requirements for processing and manufacturing films.

[0008] Therefore, the specific technical solution adopted by the present invention is as follows:

[0009] According to one aspect of the present invention, an elastomeric material for a non-medium-coated fabric is provided, comprising the following main materials in weight percentages:

[0010] Thermoplastic polyamide elastomer 2-98%, thermoplastic silicone elastomer 2-98%, compatibilizer 0-7%;

[0011] The thermoplastic polyamide elastomer is a block copolymer composed of rigid polyamide and flexible polyether or polyester blocks. The thermoplastic silicone elastomer is an elastomer formed by vulcanizing silicone rubber and uniformly dispersing it in a polyurethane matrix through dynamic vulcanization. The compatibilizer is a copolymer of maleic anhydride grafted olefin or a block copolymer of polyurethane polyamide. The film made of the elastomer material is bonded to the textile fabric through a melt penetration lamination process to form a medium-free laminated fabric.

[0012] Optionally, the thermoplastic polyamide elastomer has a Shore hardness of 70-95A, a melting point of 130-160℃, a tensile strength ≥10MPa, a tear strength ≥45KN / m, an elongation at break >200%, and a melt flow rate (190℃ / 2.16kg) of 1.5-20min; preferably, it is manufactured by Wanhua Chemical. Grade 4011.

[0013] Optionally, the thermoplastic silicone elastomer has a Shore hardness of 50-90A, a melting point of 135-165℃, a tensile strength ≥2MPa, a tear strength ≥20KN / m, an elongation at break >400%, and a melt flow rate (190℃ / 10kg) of 2-25g / 10min; preferably, Dow Corning TPSIV. TM Grade 4200-50A.

[0014] Optionally, the weight ratio of the thermoplastic polyamide elastomer to the thermoplastic silicone elastomer is 2:98 to 98:2, and the polarity difference between the two is synergistically adjusted by a compatibilizer to meet the compatibility requirements of different elastomer types. For grades with low blending ratios and similar material polarities, compatibilizers may be omitted. The preferred compatibilizer is Dow's maleic anhydride-grafted butyl acrylate FUSABOND. TM A560.

[0015] Optionally, it also includes auxiliary materials by weight percentage of the main material: 1-5% ultraviolet absorber, 1-6% graphene, and 2-12% porous micro powder;

[0016] The ultraviolet absorber is used to give the fabric sun protection function, graphene is used to give it warmth function, and porous micro powder is used to give it breathability and moisture permeability.

[0017] Optionally, the porous powder is an inorganic or organic porous powder with a particle size of 5-25 μm and a porosity of ≥55%, used to improve the air and moisture permeability of the film without affecting the melt processability of the elastomer.

[0018] Optionally, the melt flow rate (MI value) of the thermoplastic elastomer material, the similar melting point and compatibility properties meet the process requirements of extrusion film processing, and the formed film is free from delamination, separation, crystal points and precipitation, and the film elongation at break is ≥200%.

[0019] Optionally, the textile fabric includes nylon, polyester, spandex, cotton fiber, protein fiber and their blended fabrics and non-woven fabrics. The elastomer material enters the fiber pores of the fabric through melt penetration to form a physical anchoring bond, without the need for glue or PUR hot melt adhesive medium.

[0020] Optionally, the processing flow of the elastomer material includes: mixing thermoplastic polyamide elastomer, thermoplastic silicone elastomer particles and auxiliary materials at room temperature, extruding and granulating them at 160-210°C using a twin-screw granulator, then forming a film through casting, blow molding or extrusion stretching processes, and finally laminating it with fabric through melt infiltration.

[0021] Optionally, the elastomer material is used to prepare a windproof, waterproof, lightweight, skin-friendly, and high peel strength laminated fabric, wherein the laminated fabric can be a combination of a single layer or multiple layers of film and a single layer or multiple layers of fabric.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] It abandons the media such as glue and PUR hot melt adhesive in traditional lamination processes, and only the elastomer material itself melts and penetrates into the pores of the fabric fibers to achieve physical anchoring and bonding with the fabric. It has high peel strength, eliminates the risk of chemical media residue from the source, and does not require the addition of additional additives in the lamination process, reducing pollution in the production process and lowering the cost of subsequent fabric processing.

[0024] Combining thermoplastic polyamide elastomers and thermoplastic silicone elastomers offers complementary advantages:

[0025] In terms of strength, elasticity, and feel, the high tensile strength and high tear strength of thermoplastic polyamide elastomers compensate for the insufficient strength of thermoplastic silicone elastomers; the high elongation, flexibility, and silky feel of thermoplastic silicone elastomers improve the stiff and rough texture of polyamide elastomers; the composite material formed by blending the two complements each other in terms of softness, tensile strength, tear strength, smoothness, elasticity, and wear resistance.

[0026] In terms of moisture permeability, thermoplastic polyamide elastomers have higher density and poorer moisture permeability; thermoplastic silicone elastomers are softer, less dense, and have better moisture permeability. Adding thermoplastic silicone elastomers to thermoplastic polyamide elastomers can improve moisture permeability. Adding thermoplastic polyamide elastomers to thermoplastic silicone elastomers can also improve the encapsulation ability of porous micropowders and other auxiliary materials, which is also beneficial for improving moisture permeability.

[0027] More importantly, in terms of peel strength, thermoplastic polyamide elastomers bond strongly with nylon, cotton, and protein fibers, with a peel strength ≥260 N / m. Thermoplastic polyamide elastomers show the highest bonding strength with nylon fabrics, with a peel strength ≥430 N / m. However, the peel strength is weak when bonded to spandex blends and nonwoven fabrics, only around 105 N / m. Thermoplastic silicone elastomers bond strongly with polyester, spandex blends, and nonwoven fabrics, with a peel strength ≥210 N / m. The peel strength is highest when bonded to spandex blends, reaching over 290 N / m. However, the strength of thermoplastic silicone elastomers when bonded to nylon, cotton, and protein fibers is poor, only around 80 N / m. Therefore, the content of thermoplastic polyamide elastomers and thermoplastic silicone elastomers needs to be adjusted for different fabric materials. For example, in the elastomer formulation of nylon fabrics, the proportion of polyamide elastomer is >90%; for spandex blended fabrics, the amount of silicone elastomer is >90%. By adjusting the different proportions of the two elastomers, a strong bonding of nylon, polyester, spandex, cotton fibers, protein fibers and their blended fabrics, as well as non-woven fabrics, can be achieved, with a peel strength of at least 125 N / m, exceeding that of traditional PTFE composite fabrics by more than 150%. The peel strength of traditional PTFE composite fabrics is generally between 30-50 N / m.

[0028] The introduction of auxiliary materials endows composite materials with multiple functions, meeting standard requirements: UV absorbers (1-5%) increase the fabric's UV protection factor (UPF value) to ≥40 (GB / T18830-2009); graphene (1-6%) can increase the fabric's far-infrared radiation temperature rise by ≥1.4℃ (GB / T30127-2013); porous micro powder (2-12%) achieves a moisture permeability of ≥6000g / m². 2 • 24h (GB / T12704.2-2009); The functional material has good compatibility with the elastomer matrix, and its addition does not affect the melt processability and mechanical properties of the film. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0030] Example 1

[0031] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0032] Thermoplastic polyamide elastomer 2-98%, thermoplastic silicone elastomer 2-98%, compatibilizer 0-7%;

[0033] Thermoplastic polyamide elastomers are block copolymers composed of rigid polyamides and flexible polyethers or polyester blocks. Thermoplastic silicone elastomers are elastomers formed by vulcanizing silicone rubber and uniformly dispersing it in a polyurethane matrix through dynamic vulcanization. The compatibilizer is a copolymer of maleic anhydride grafted olefins or a block copolymer of polyurethane and polyamide. The elastomer materials are combined with textile fabrics through melt penetration lamination process to form a medium-free laminated fabric.

[0034] The thermoplastic polyamide elastomer has a Shore hardness of 70-95A, a melting point of 130-160℃, a tensile strength ≥10MPa, a tear strength ≥45KN / m, an elongation at break >200%, and a melt flow rate (190℃ / 2.16kg) of 1.5-20g / 10min; preferably Wanhua Chemical. Grade 4011.

[0035] The thermoplastic silicone elastomer has a Shore hardness of 50-90A, a melting point of 135-165℃, a tensile strength ≥2MPa, a tear strength ≥20KN / m, an elongation at break >400%, and a melt flow rate (190℃ / 10kg) of 2-25g / 10min; Dow Corning TPSIV is preferred. TM Grade 4200-50A.

[0036] The weight ratio of thermoplastic polyamide elastomer to thermoplastic silicone elastomer is 2:98 to 98:2, and the polarity difference between the two is synergistically adjusted by compatibilizers to meet the compatibility requirements of different elastomer types. Dow's maleic anhydride-grafted butyl acrylate FUSABOND is preferred. TM A560.

[0037] It also includes auxiliary materials by weight percentage of the main materials: 1-5% ultraviolet absorber, 1-6% graphene, and 2-12% porous micro powder;

[0038] UV absorbers are used to give fabrics sun protection, graphene is used to give them warmth, and porous micropowders are used to give them breathability and moisture permeability.

[0039] Porous micro powders are inorganic or organic porous powders with a particle size of 5-25 μm and a porosity of ≥55%. They are used to improve the air and moisture permeability of films without affecting the melt processability of elastomers.

[0040] The melt flow rate (MI value) of the elastomer material, similar melting point, and good compatibility meet the process requirements of calendering, blow molding, or extrusion stretching of films. The resulting film is free from delamination, separation, crystal points, and precipitation, and the film elongation at break is ≥200%.

[0041] Textile fabrics include nylon, polyester, spandex, protein fiber or cotton fiber and their blended or non-woven fabrics. Elastomer materials penetrate into the pores of the fabric fibers through melt penetration to form a physical anchoring bond, without the need for glue or PUR hot melt adhesive media.

[0042] The processing flow of elastomer materials includes: mixing thermoplastic polyamide elastomer, thermoplastic silicone elastomer particles and auxiliary materials at room temperature, extruding and granulating them at 160-210℃ using a twin-screw granulator, then forming films through casting, blow molding or extrusion stretching processes, and finally laminating them with fabrics using a melt infiltration method.

[0043] Elastomer materials are used to prepare windproof, waterproof, lightweight, skin-friendly, and high-peel-strength laminated fabrics. The laminated fabrics can be a combination of single-layer or multi-layer films with single-layer or multi-layer fabrics.

[0044] Example 2

[0045] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0046] Thermoplastic polyamide elastomer 50%, thermoplastic silicone elastomer 43%, compatibilizer 7%;

[0047] It also includes auxiliary materials by weight percentage of the main materials: 3% ultraviolet absorber, 3% graphene, and 6% porous micro powder;

[0048] The processing flow is as follows:

[0049] S1. Add all components to a mixer and mix at room temperature for 30 minutes;

[0050] S2. The temperature of the twin-screw granulator is set to 190℃ for extrusion granulation.

[0051] S3, casting machine temperature 180℃, extrusion stretching to form film, thickness 35μm;

[0052] S4. The film and different fabrics are melt-infiltrated and laminated at 165℃ and 0.3MPa pressure for 40 seconds.

[0053] Example 3

[0054] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0055] Thermoplastic polyamide elastomer 14%, thermoplastic silicone elastomer 85%, compatibilizer 2%;

[0056] It also includes auxiliary materials by weight percentage of the main materials: 3% ultraviolet absorber, 3% graphene, and 6% porous micro powder;

[0057] The processing flow is as follows:

[0058] S1. Add all components to a mixer and mix at room temperature for 30 minutes;

[0059] S2. The temperature of the twin-screw granulator is set to 175℃ for extrusion granulation.

[0060] S3, casting machine temperature 180℃, casting film thickness 30μm;

[0061] S4. The film and different fabrics are melt-infiltrated and laminated at 170℃ and 0.5MPa pressure for 30 seconds.

[0062] Example 4

[0063] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0064] Thermoplastic polyamide elastomer 85%, thermoplastic silicone elastomer 12%, compatibilizer 3%;

[0065] It also includes auxiliary materials by weight percentage of the main materials: 3% ultraviolet absorber, 3% graphene, and 6% porous micro powder;

[0066] The processing flow is as follows:

[0067] S1. Add all components to a mixer and mix at room temperature for 30 minutes;

[0068] S2. The temperature of the twin-screw granulator is set to 200℃ for extrusion granulation.

[0069] S3, casting machine temperature 180℃, blow molding film, thickness 40μm;

[0070] S4. The film and different fabrics are melt-infiltrated and laminated at 160℃ and 0.2MPa pressure for 50 seconds.

[0071] Example 5

[0072] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0073] Thermoplastic polyamide elastomer 2%, thermoplastic silicone elastomer 98%, compatibilizer 0%;

[0074] It also includes auxiliary materials by weight percentage of the main materials: 3% ultraviolet absorber, 3% graphene, and 6% porous micro powder;

[0075] The processing flow is as follows:

[0076] S1. Add all components to a mixer and mix at room temperature for 30 minutes;

[0077] S2. The temperature of the twin-screw granulator is set to 210℃ for extrusion granulation.

[0078] S3, casting machine temperature 180℃, casting film thickness 35μm;

[0079] S4. The film and different fabrics are melt-infiltrated and laminated at 175℃ and 0.4MPa pressure for 40 seconds.

[0080] Example 6

[0081] An elastomer material for a non-medium-coated fabric comprises the following main materials in weight percentage:

[0082] Thermoplastic polyamide elastomer 98%, thermoplastic silicone elastomer 2%, compatibilizer 0%;

[0083] It also includes auxiliary materials by weight percentage of the main materials: 3% ultraviolet absorber, 3% graphene, and 6% porous micro powder;

[0084] The processing flow is as follows:

[0085] S1. Add all components to a mixer and mix at room temperature for 30 minutes;

[0086] S2. The temperature of the twin-screw granulator is set to 160℃ for extrusion granulation.

[0087] S3, casting machine temperature 180℃, extrusion stretching to form film, thickness 50μm;

[0088] S4. The film and different fabrics are melt-infiltrated and laminated at 160℃ and 0.1MPa pressure for 60 seconds.

[0089] Table 1: Ingredients List for Example 1

[0090]

[0091] The experimental results of the composite fabrics prepared through Examples 2, 3, 4, 5, and 6 are shown in Table 2.

[0092] Table 2: Test Data Table for Experimental Examples (Single-Layer Composite Fabric)

[0093]

[0094]

[0095] In the comparative implementation, the amounts of porous micropowder, UV absorber, and graphene auxiliary materials were the same; only the ratio of thermoplastic polyamide elastomer and thermoplastic silicone elastomer was changed. In Examples 4 and 5, the compatibilizer was 0%. Different examples employed different extrusion granulation and film-forming processes to produce films of varying thicknesses, which were then laminated with fabrics under different pressures and temperatures. The comparison of the examples showed that elastomers with different formulations could all be processed into films normally. Without the involvement of any adhesives or PUR hot melt adhesives, the films were laminated with different fabrics using a melt-penetration process. The laminated fabrics exhibited good tensile strength, tear strength, peel strength, and moisture permeability, fully meeting the technical standards for fabric lamination. Different combinations of thermoplastic polyamide elastomer and thermoplastic silicone elastomer with compatibilizers showed significantly different data, providing a basis for selecting and optimizing formulations for different fabrics. The UV protection coefficient, far-infrared temperature rise, and moisture permeability of the added auxiliary materials all met the corresponding fabric standards. The test data uses data from single-layer fabric and single-layer film lamination, as single-layer lamination data is more representative. Multi-layer lamination can also be used, with the same lamination principles and technical requirements. Except for non-woven fabrics, tensile breaking strength and tear strength are measured using warp-direction test data.

[0096] Although the present invention has been disclosed above with reference to preferred embodiments, the embodiments are merely examples for illustrative purposes and are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. The scope of protection claimed by the present invention should be determined by the claims.

Claims

1. An elastomer material for a medium-free laminated fabric, characterized in that, The main materials comprised in the following weight percentages: Thermoplastic polyamide elastomer 2-98%, thermoplastic silicone elastomer 2-98%, compatibilizer 0-7%; The thermoplastic polyamide elastomer is a block copolymer composed of rigid polyamide and flexible polyether or polyester blocks. The thermoplastic silicone elastomer is an elastomer formed by vulcanizing silicone rubber and uniformly dispersing it in a polyurethane matrix through dynamic vulcanization. The compatibilizer is a copolymer of maleic anhydride grafted olefin or a block copolymer of polyurethane and polyamide. The elastomer material is compounded and processed into a film, and then the elastomer film is melted and penetrated into the fiber pores of the fabric to form a medium-free laminated fabric.

2. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, The thermoplastic polyamide elastomer has a Shore hardness of 70-95A, a melting point of 130-160℃, a tensile strength ≥10MPa, a tear strength ≥45KN / m, an elongation at break >200%, and a melt flow rate (190℃ / 2.16kg) of 1.5-20g / 10min.

3. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, The thermoplastic silicone elastomer has a Shore hardness of 50-90A, a melting point of 135-165℃, a tensile strength ≥2MPa, a tear strength ≥20KN / m, an elongation at break >400%, and a melt flow rate (190℃ / 10kg) of 2-25g / 10min.

4. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, The weight ratio of the thermoplastic polyamide elastomer to the thermoplastic silicone elastomer is 2:98 to 98:2, and the polarity difference between the two is adjusted synergistically by a compatibilizer to meet the compatibility requirements of different types of elastomers.

5. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, It also includes auxiliary materials by weight percentage of the main materials: 1-5% ultraviolet absorber, 1-6% graphene, and 2-12% porous micro powder; The ultraviolet absorber is used to give the fabric sun protection function, graphene is used to give it warmth function, and porous micro powder is used to give it breathability and moisture permeability.

6. The elastomer material of the non-medium-coated fabric according to claim 5, characterized in that, The porous micro powder is an inorganic or organic porous powder with a particle size of 2-25 μm and a porosity of ≥55%. It is used to improve the air and moisture permeability of the film without affecting the melt processability of the elastomer.

7. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, The melt flow rate (MI value), similar melting point, and material affinity and compatibility of the elastomer material meet the process requirements for extrusion film processing. The resulting film is free from delamination, separation, crystal points, and precipitation, and has an elongation at break of ≥200%.

8. The dielectric-free elastomeric material according to claim 1, characterized in that, The textile fabric includes nylon, polyester, spandex, cotton fiber, protein fiber and their blended fabrics and non-woven fabrics. The elastomer material enters the fiber pores of the fabric through melt penetration to form a physical anchoring bond, without the need for glue or PUR hot melt adhesive medium.

9. The elastomer material of the non-medium-coated fabric according to claim 1, characterized in that, The processing flow of the elastomer material includes: mixing thermoplastic polyamide elastomer, thermoplastic silicone elastomer particles and auxiliary materials at room temperature, extruding and granulating them at 160-210℃ using a twin-screw granulator, then forming a film through casting, blow molding or extrusion stretching processes, and finally laminating it with fabric through melt infiltration.

10. The elastomer material according to any one of claims 1-9, characterized in that, The elastomer material is used to prepare a windproof, waterproof, lightweight, skin-friendly, and high-peel-strength laminated fabric. The laminated fabric can be a combination of a single layer or multiple layers of film and a single layer or multiple layers of fabric.

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