Novel fluoride-free TPER elastic material as well as preparation method, application and application method thereof

Abstract

The invention discloses a novel fluoride-free TPER elastic material as well as a preparation method, application and an application method thereof, and belongs to the technical field of composite fabric substrates. 5-15% of mineral powder; 5-8% of soft wax; 1-5% of an ultraviolet light absorber; 1-13% of a polyolefin elastomer; the preparation method comprises the following steps: S1, mixing, heating and melting the thermoplastic elastomer and the polyolefin elastomer to obtain an interpenetrating network TPE thermoplastic elastomer; s2, adding mineral powder, soft wax and an ultraviolet light absorber into the TPE, and mixing and stirring; s3, processing through a plastic extruding machine to obtain TPER elastic material particles; s4, processing into a TPER fluoride-free film through a casting machine and a blow molding machine; the novel fluoride-free TPER elastic material provided by the invention can be applied to a composite fabric, fluoride and glue are avoided in the process of preparing a fabric substrate and the process of preparing the composite fabric, medium-free compounding is realized, and the novel fluoride-free TPER elastic material is more environment-friendly; meanwhile, due to the characteristics of all the components, the prepared fabric has windproof and moisture-permeable properties.

Description

Technical Field

[0001] The present invention relates to the technical field of fabric substrates, and in particular to a novel fluorine-free TPER elastic material and a preparation method, application and application method thereof. Background Art

[0002] The technology of traditional composite fabrics, namely fabric + glue + membrane + glue + fabric, has technical pain points, and the fabric contains fluorine-containing PFAS, which is unsafe, as well as weak elasticity, weak tensile strength, low recovery rate, flexibility and brittleness, poor low temperature resistance, short aging resistance and life, processing technology limitations, and recycling and reuse. Summary of the Invention

[0003] The present invention is intended to provide a novel fluorine-free TPER elastic material and its preparation method, application and application method to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A new type of fluorine-free TPER elastic material comprises the following components by mass percentage: thermoplastic rubber, 60-82%; mineral powder, 5-15%; soft wax, 5-8%; ultraviolet absorber, 1-5%; and polyolefin elastomer, 1-13%.

[0006] Preferably, the thermoplastic rubber includes a low molecular weight SEBS rubber type and a high molecular weight SEBS rubber type.

[0007] Preferably, the mineral powder includes any one of calcium carbonate, quartz sand, talc, montmorillonite, kaolin and bentonite.

[0008] Preferably, the soft wax is a wax containing isoparaffins and cycloparaffins, wherein the content of isoparaffins is greater than that of cycloparaffins.

[0009] A method for preparing a novel fluorine-free TPER elastic material, the preparation steps comprising:

[0010] S1. The thermoplastic elastomer and the polyolefin elastomer are mixed and heated to melt to obtain an interpenetrating network TPE thermoplastic elastomer;

[0011] S2. Add mineral powder, soft wax and UV absorber to the TPE thermoplastic elastomer and mix and stir;

[0012] S3 TPER elastic material particles obtained by extruder processing;

[0013] S4. Processed into TPER fluorine-free film through cast machine and blow molding machine.

[0014] A novel method for preparing a fluorine-free TPER elastic material is disclosed to prepare the fluorine-free TPER elastic material.

[0015] Application of a new type of fluorine-free TPER elastic material in dielectric-free composite fabrics.

[0016] Preferably, the application method comprises stacking fabrics on the upper and lower sides of the TPER fluorine-free film, heating to 150° C.-180° C., and hot pressing to obtain a dielectric-free composite fabric.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The novel fluorine-free TPER elastic material provided by the present invention does not contain any fluorine or glue in the components, processing and preparation process, and application in the preparation of composite fabrics, thereby realizing an environmentally friendly and environmentally friendly new functional fabric.

[0019] The novel fluorine-free TPER elastomer material provided by this invention comprises mineral powder, which forms an island-in-the-sea structure with an elastomer. Before laminating the film with a fabric, the elastomer is wrapped around a core-shell structure, sealing the core-shell micropores. During lamination with the fabric, the elastomer melts at high temperatures, permeating and dispersing into the fabric fibers, forming a strong bond with the fabric. Simultaneously, the microporous core-shell structure becomes visible, demonstrating high permeability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a preparation method and application flow chart of a new type of fluorine-free TPER elastic material;

[0021] Figure 2 This is a physical display of a new type of fluorine-free TPER elastic material. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0023] like Figure 1 As shown, a new type of fluorine-free TPER elastic material, the components of which are, by mass percentage, the following: thermoplastic rubber, 60-82%; mineral powder, 5-15%; soft wax, 5-8%; ultraviolet absorber, 1-5%; and polyolefin elastomer, 1-13%.

[0024] Thermoplastic rubber includes low molecular weight SEBS rubber models and high molecular weight SEBS rubber models;

[0025] Mineral powder includes any one of calcium carbonate, quartz sand, talc, montmorillonite, kaolin and bentonite;

[0026] Soft wax is a wax containing isoparaffins and cycloparaffins, wherein the isoparaffin content is greater than the cycloparaffin content.

[0027] Soft wax: It has good compatibility with TPE thermoplastic elastomer, plasticizes TPE thermoplastic elastomer, and improves processing fluidity; it maintains the elasticity and softness of TPE thermoplastic elastomer, so that after it is prepared into TPER elastic material, it has the properties of not destroying the tensile and recovery properties, not easy to migrate and precipitate, good stability, and not easy to age and yellow.

[0028] Mineral powder: It is porous, breathable and moisture permeable and not easy to melt. It remains in a solid state during the thermoplastic processing with TPE thermoplastic elastomer, maintaining the shape of the mineral powder without obvious changes and the porosity unchanged. The deformation difference between mineral powder and TPE thermoplastic elastomer is large, and micropores are easily formed at the interface due to deformation. TPE thermoplastic elastomer and soft wax are highly hydrophobic and lack breathable and moisture permeability. They need to rely on the hydrophilic properties of mineral powder to ensure that the TPER elastic material has moisture permeability after being applied to prepare composite fabrics.

[0029] A method for preparing a novel fluorine-free TPER elastic material, the preparation steps comprising:

[0030] S1. The thermoplastic elastomer and the polyolefin elastomer are mixed and heated to melt to obtain an interpenetrating network TPE thermoplastic elastomer;

[0031] S2. Add mineral powder, soft wax and UV absorber to the TPE thermoplastic elastomer and mix and stir;

[0032] S3 TPER elastic material particles obtained by extruder processing;

[0033] S4. Processed into TPER fluorine-free film through cast machine and blow molding machine.

[0034] The new fluorine-free TPER elastic material can be used to prepare dielectric-free composite fabrics. The specific application and preparation methods are as follows:

[0035] The upper and lower fabrics of the new fluorine-free TPER elastic material are stacked, heated to 150℃-180℃, and hot pressed to obtain a dielectric-free composite fabric. No fluorine or glue is added during the whole process, which is more environmentally friendly.

[0036] TPER elastic material uses thermoplastic rubber (SEBS) as the main film-forming material. SEBS has the characteristics of melting at high temperature and physically cross-linking to form an elastomer at low temperature. It has both plasticity and high elasticity, and combines the dual properties of plastic and rubber.

[0037] SEBS has excellent heat and weather resistance and outstanding mechanical properties. Its brittle temperature is below -70°C and its maximum operating temperature reaches 140°C. After 100 hours of ozone aging (38°C), its performance deteriorates by less than 10%. Its tensile elongation is greater than 500%, its tensile recovery is greater than 90%, and its tensile strength is greater than 20 kPa.

[0038] SEBS is a non-polar material that is lipophilic but not hydrophilic, with a contact angle with water greater than 120 degrees, making it highly hydrophobic. SEBS also does not hydrolyze, and its molecular structure is not easily degraded in water.

[0039] SEBS itself has poor air permeability. To achieve excellent breathability, a microporous core-shell material is introduced, forming a sea-and-island structure with the SEBS. Before laminating the film to the fabric, the SEBS wraps around the core-shell, sealing its micropores. At this stage, air permeability is still poor. Only after laminating the film to the fabric at high temperatures does its breathability truly manifest. During lamination, the SEBS melts at high temperatures, but the microporous core-shell material remains unchanged. Once melted, the SEBS permeates and disperses into the fabric's fibers. As the fabric absorbs the molten SEBS, the microporous core-shell material becomes visible. The more the SEBS melts and seeps out, the more prominent the core-shell becomes, and the greater the breathability, much like the reefs revealed at low tide.

[0040] When the melted SEBS cools, a cross-linking reaction occurs again, forming a cross-linked elastomer both inside and outside the fabric fiber structure, so that both sides of the fabric covering layer are made of elastomer material, which is firmly bonded, soft and elastic, resistant to rubbing without creases, resistant to water washing, and difficult to delaminate and bubble and peel.

[0041] Example 1:

[0042] The components are selected in percentage by mass as follows: 82% of thermoplastic rubber; 5% of mineral powder; 5% of soft wax; 2% of ultraviolet absorber; and 6% of polyolefin elastomer.

[0043] The thermoplastic elastomer and the polyolefin elastomer are mixed, heated and melted to obtain an interpenetrating network TPE thermoplastic elastomer;

[0044] Adding mineral powder, soft wax and ultraviolet absorber to TPE thermoplastic elastomer and mixing and stirring;

[0045] The TPER elastic material particles are processed by an extruder; and the TPER fluorine-free film is processed by a casting machine and a blow molding machine.

[0046] The prepared TPER fluorine-free film can be applied to composite fabrics. Fabrics are placed above and below the TPER fluorine-free film, heated to 150°C-180°C, and hot pressed to obtain a dielectric-free composite fabric.

[0047] Example 2:

[0048] The components are selected in percentage by mass as follows: 60% of thermoplastic rubber; 14% of mineral powder; 8% of soft wax; 5% of ultraviolet absorber; and 13% of polyolefin elastomer.

[0049] The thermoplastic elastomer and the polyolefin elastomer are mixed, heated and melted to obtain an interpenetrating network TPE thermoplastic elastomer;

[0050] Adding mineral powder, soft wax and ultraviolet absorber to TPE thermoplastic elastomer and mixing and stirring;

[0051] The TPER elastic material particles are processed by an extruder; and the TPER fluorine-free film is processed by a casting machine and a blow molding machine.

[0052] The prepared TPER fluorine-free film can be applied to composite fabrics. Fabrics are placed above and below the TPER fluorine-free film, heated to 150°C-180°C, and hot pressed to obtain a dielectric-free composite fabric.

[0053] The above is only an embodiment of the present invention, and the common knowledge such as the specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A new type of fluorine-free TPER elastic material, characterized by: The components include, by mass percentage, thermoplastic rubber, 60-82%; mineral powder, 5-15%; soft wax, 5-8%; ultraviolet absorber, 1-5%; and polyolefin elastomer, 1-13%.

2. The novel fluorine-free TPER elastic material according to claim 1, characterized in that: The thermoplastic rubber includes a low molecular weight SEBS rubber type and a high molecular weight SEBS rubber type.

3. The fluorine-free TPER elastic material according to claim 1, characterized in that: The mineral powder includes any one of calcium carbonate, quartz sand, talc, montmorillonite, kaolin and bentonite.

4. The fluorine-free three-layer composite clothing fabric according to claim 1, characterized in that: The soft wax is a wax containing isoparaffins and cycloparaffins, wherein the content of isoparaffins is greater than that of cycloparaffins.

5. The method for preparing a fluorine-free TPER elastic material according to claim 1, characterized in that: The preparation steps include: S1. The thermoplastic elastomer and the polyolefin elastomer are mixed and heated to melt to obtain an interpenetrating network TPE thermoplastic elastomer; S2. Add mineral powder, soft wax and UV absorber to the TPE thermoplastic elastomer and mix and stir; S3 TPER elastic material particles obtained by extruder processing; S4. Processed into TPER fluorine-free film through cast machine and blow molding machine.

6. A method for preparing the novel fluorine-free TPER elastic material according to claim 5, wherein the method comprises preparing a TPER fluorine-free film.

7. Use of the novel fluorine-free TPER elastic material according to claim 6 in dielectric-free composite fabrics.

8. The method for applying the novel fluorine-free TPER elastic material according to claim 6, characterized in that: The application method comprises the steps of stacking fabrics on the upper and lower sides of the TPER fluorine-free film, heating the fabrics to 150° C.-180° C., and hot pressing the fabrics to obtain a dielectric-free composite fabric.

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