Cold-resistant soft TPU (thermoplastic polyurethane) barrier film and composite waterproof joint strip for windproof and waterproof clothes

Abstract

The invention provides a cold-resistant soft TPU (thermoplastic polyurethane) barrier film and a composite waterproof joint strip for windproof and waterproof clothing, and belongs to the technical field of windproof and waterproof clothing materials. The TPU barrier film provided by the invention comprises the following components in parts by weight: 70-90 parts of polyurethane colloidal particles A; 10-30 parts of thermoplastic polyester elastomer colloidal particles; 5 to 25 parts of nano silicon dioxide master batch; and 5 to 20 parts of SEBS rubber. The composite waterproof joint strip is composed of the cold-resistant soft TPU barrier film and TPU hot melt adhesive compounded on the single face of the TPU barrier film. The fabric is cold-resistant, soft, good in elasticity, good in washing resistance and water pressure resistance, and high in coating bonding strength for two layers of windproof and waterproof clothes. The composite waterproof joint strip is used for manufacturing two-layer windproof and waterproof clothes, the problems that an adhesive tape becomes hard and brittle in the low-temperature environment of-20 DEG C or below, and two layers of fabric of a pressing belt are dynamically twisted and cracked at the low temperature can be effectively solved, the wearing experience of consumers is improved, and the composite waterproof joint strip has good application prospects.

Description

Technical Field

[0001] This invention relates to the field of windproof and waterproof clothing materials, and in particular to cold-resistant and soft TPU barrier film and composite waterproof strips for windproof and waterproof clothing. Background Technology

[0002] As living standards improve, people are paying more attention to health, and the desire for a higher quality of life has fueled the rise of outdoor sports. Waterproof clothing with windproof, breathable, moisture-wicking, and warmth-retaining properties is therefore highly favored by consumers.

[0003] In existing technologies, there are generally two ways to manufacture windproof and waterproof clothing: one is to sew the fabric together with a sewing machine without pressing a sealing strip. This type of clothing is not very effective at preventing wind and water damage and is prone to leaks when exposed to wind and rain for a long time; the other method is to press a waterproof strip on the seam seams to achieve windproof, waterproof and heat insulation functions.

[0004] The existing composite waterproof strip structure is a barrier film heated to melt adhesive. The barrier film is mainly divided into three types: PU, TPU and PVC. The adhesive layer is usually TPU hot melt adhesive or rubber, which has a good adhesion effect on waterproof fabrics such as PU, hydrophilic PU, PVC, PA, PTFE, TPE coating, etc., thus giving the clothing windproof, waterproof and heat insulation functions.

[0005] However, existing technologies have drawbacks: in low-temperature environments of -20℃ and below, composite waterproof strips become noticeably harder and brittle, and may even become brittle and crack due to low-temperature dynamic twisting, bending, or even cracking. This not only deteriorates the wearing experience but also affects the windproof and waterproof function, causing many inconveniences for consumers. Summary of the Invention

[0006] In view of this, to solve the technical problems of existing composite waterproof tapes becoming significantly hardened and brittle in low-temperature environments, exhibiting dynamic twisting, bending, and even brittle cracking at low temperatures, this invention provides a cold-resistant and soft TPU barrier film and composite waterproof tape for windproof and waterproof clothing. It is cold-resistant, soft, and elastic, with good water resistance and water pressure resistance, and exhibits high adhesion strength to the coatings of two layers of windproof and waterproof clothing. Using this composite waterproof tape in the manufacture of two-layer windproof and waterproof clothing can effectively improve the problems of tape hardening and brittleness in low-temperature environments (-20℃ and below) and dynamic twisting and cracking of the two layers of fabric at low temperatures, improving the consumer's wearing experience and showing great application prospects.

[0007] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a windproof and waterproof, cold-resistant, soft TPU barrier film for clothing, comprising the following components in parts by weight: Polyurethane granules A: 70-90 parts; Thermoplastic polyester elastomer granules: 10-30 parts; Nano silica masterbatch: 5-25 parts; SEBS rubber: 5-20 parts.

[0008] Secondly, the present invention provides a composite waterproof strip, which is composed of the above-mentioned cold-resistant and soft TPU barrier film and TPU hot melt adhesive laminated on one side of the TPU barrier film.

[0009] Compared with the prior art, the present invention has the following beneficial effects: (1) Excellent low-temperature resistance, solving the problem of low-temperature embrittlement and cracking. Low-temperature flexibility: By introducing thermoplastic polyester elastomer (TPEE) particles, SEBS rubber and nano silica masterbatch into the TPU barrier film, the flexibility of the material in extreme low-temperature environments is significantly improved.

[0010] Low-temperature elasticity and torsion resistance: The combination of TPU barrier film and TPU hot melt adhesive effectively improves the problems of tape hardening, embrittlement and dynamic torsion cracking in environments at -20℃ and below, ensuring the structural integrity of windproof and waterproof clothing during low-temperature activities.

[0011] (2) High bonding strength and durability ensure long-term performance of clothing High coating adhesion strength: TPU hot melt adhesive uses materials such as polyether type and polycaprolactone type, which have excellent adhesion performance to PU, PVC and PTFE coated fabrics commonly used in windproof and waterproof clothing.

[0012] Water resistance and water pressure resistance: After repeated washing, the composite waterproof strip does not show significant reduction in wind and water resistance, making it suitable for the long-term use of outdoor clothing.

[0013] (3) Material formulation optimization, taking into account both performance and process compatibility Innovative barrier membrane formulation: Through the combined action of polyurethane particles A, thermoplastic polyester elastomer (TPEE) particles, and SEBS rubber, the cold resistance, elasticity, and strength of the membrane material are significantly improved; The addition of nano-silica masterbatch further optimizes the mechanical properties and dimensional stability of the material, and reduces the shrinkage rate.

[0014] (4) Enhance the wearing experience and expand application scenarios Improved comfort in low temperatures: It solves the problem of traditional waterproof strips hardening and becoming brittle at low temperatures, which restricts clothing movement and enhances the practicality of outdoor clothing in extreme environments such as high altitudes and polar regions. Suitable for a variety of fabric types: It has good compatibility with both direct-coated and laminated fabrics, and does not crack under low-temperature dynamic twisting and bending, making it suitable for a wide range of applications.

[0015] In summary, this invention, through material formulation optimization (the combined use of barrier film and hot melt adhesive), achieves composite waterproof strips with superior low-temperature flexibility, crack resistance, high bonding strength, and durability in low-temperature environments of -20℃ and below, which is significantly better than existing technologies and has important practical application value. Detailed Implementation

[0016] This invention provides a windproof and waterproof, cold-resistant, soft TPU barrier film for clothing, characterized by comprising the following components in parts by weight: Polyurethane granules A: 70-90 parts; Thermoplastic polyester elastomer granules: 10-30 parts; Nano silica masterbatch: 5-25 parts; SEBS rubber: 5-20 parts.

[0017] In this invention, polyurethane granules A comprise the following components in parts by weight: diol: 45-58 parts, diisocyanate: 32-40 parts, chain extender: 10-15 parts, polycarbodiimide: 0.5-1.5 parts, antioxidant: 0.1-1 parts, and ultraviolet absorber: 0.3-1 parts.

[0018] The diol preferably has a number-average molecular weight of 1000-4000 g / mol, more preferably 2000-4000 g / mol. The diol is preferably at least one of polytetrahydrofuran ether diol (PTMG), polycaprolactone diol (PCL), polyester diol, and polycarbonate diol (PCDL).

[0019] The diisocyanate is at least one of isophorone diisocyanate (IPDI) and hexamethylene diisocyanate (HDI).

[0020] The chain extender is preferably at least one of 1,4-butanediol (BDO), 1,6-hexanediol (HDO), diethylene glycol (DEG), triethylene glycol (TEG), and dithiodipropionic acid.

[0021] The antioxidant is preferably at least one of antioxidant 1010, antioxidant 1076, antioxidant 168, antioxidant 215, or antioxidant TPP. More preferably, it is antioxidant 1010 or antioxidant 1076.

[0022] The ultraviolet absorber is preferably at least one of ultraviolet absorber UV328, ultraviolet absorber UV531, ultraviolet absorber UV5411, or ultraviolet absorber UV329. More preferably, it is ultraviolet absorber UV328 or ultraviolet absorber UV5411.

[0023] In this invention, the melt flow rate of polyurethane granules A is 5-15 g / 10 min, and the melt viscosity is between 10000-40000 mPa·s.

[0024] Thermoplastic polyester elastomer (TPEE) granules are preferably at least one of polyester-type TPEE granules and polyether-type TPEE granules.

[0025] The melt flow rate of thermoplastic polyester elastomer (TPEE) granules is 3-10 g / 10 min, and the melt viscosity is between 10000-35000 mPa.s.

[0026] The preferred nano-silica masterbatch is fumed nano-silica.

[0027] In this invention, the SEBS rubber is preferably maleic anhydride-grafted SEBS rubber, the melt mass flow rate is 2-5 g / 10 min, and the melt viscosity is between 8000-25000 mPa.s.

[0028] The present invention also provides a composite waterproof strip, which is composed of the above-mentioned cold-resistant and soft TPU barrier film and TPU hot melt adhesive laminated on one side of the TPU barrier film.

[0029] In this invention, the TPU hot melt adhesive is at least one of polyester-type polyurethane, polycaprolactone-type polyurethane, polycarbonate-type polyurethane, polyether-type polyurethane, and copolyether-type polyurethane. It may also be produced by extrusion of a blend of multiple materials using a casting machine. More preferably, it is produced by extrusion of a blend of at least one of polycaprolactone-type polyurethane and polyether-type polyurethane using a casting machine.

[0030] The TPU hot melt adhesive has a melt flow rate of 10-25 g / 10 min, a melt viscosity of 6000-20000 mPa·s, and a thickness of 0.03-0.15 mm. The TPU barrier film has a thickness of 0.05-0.2 mm, preferably 0.05-0.1 mm.

[0031] This invention also provides a method for preparing the above-mentioned cold-resistant and soft TPU barrier film and composite waterproof strip, comprising the following steps: Step (1), Preparation of polyurethane particles A: Step (11): Add antioxidants and UV absorbers to diol, heat to 100°C, disperse and dissolve evenly, and remove water by vacuum for 3 hours; Step (12): Add the above diol, chain extender, diisocyanate and polycarbodiimide to a twin-screw extruder, extrude the rubber compound through the die head and cut it into small elliptical particles underwater. The extruder temperature is 110-240℃, the underwater pelletizing water temperature is 40-60℃, the cooled and shaped particles are dehydrated, and dried at 60-80℃ for 3 hours to obtain polyurethane granules A.

[0032] Step (2): Disperse polyurethane granules A, thermoplastic polyester elastomer (TPEE) granules, nano silica masterbatch, and SEBS rubber evenly, dry at 100℃ for 3 hours, and then extrude through a casting machine to a composite embossing roller for cooling to obtain a cold-resistant and soft TPU barrier film. The temperature settings of the casting machine are as follows: extruder temperature 190-230℃, die temperature 195-210℃, filter temperature 200-230℃, composite pressure 4-8kg, and cooling temperature 8-15℃.

[0033] Step (3): TPU hot melt adhesive is extruded through a casting machine and thermally bonded to one side of the TPU barrier film. A matte release film is also bonded simultaneously. After 72 hours, the matte release film is separated, and the film is cut using a shearing machine to obtain a cold-resistant, soft, composite waterproof strip. The temperature settings for the casting machine are as follows: extruder temperature 150-175℃; filter screen temperature 160-170℃; die head temperature 155-160℃.

[0034] The composite waterproof strip provided by this invention is cold-resistant, soft, elastic, and has good water resistance and water pressure resistance. It also exhibits high adhesion strength to the coatings of two-layer windproof and waterproof clothing. Using this composite waterproof strip in the manufacture of two-layer windproof and waterproof clothing can effectively improve the problems of tape hardening and brittleness in low-temperature environments (-20℃ and below) and the dynamic twisting and cracking of the two layers of fabric at low temperatures, thus improving the consumer's wearing experience and demonstrating excellent application prospects.

[0035] The technical solution of the present invention will be clearly and thoroughly described below with reference to specific embodiments.

[0036] Example 1 A windproof, waterproof, cold-resistant, and soft TPU barrier film for clothing, the barrier film being composed of the following components in parts by weight: Polyether-type polyurethane granules A: 80 parts, melt flow rate of 8 g / 10 min, melt viscosity of 25000 mPa·s; Polyether-type TPEE granules: 10 parts, melt flow rate of 5 g / 10 min, melt viscosity of 15000 mPa.s; Nano silica masterbatch: 8 parts; SEBS rubber: 10 parts, melt flow rate of 3 g / 10 min, melt viscosity of 15000 mPa·s.

[0037] TPU barrier film polyurethane particles A are composed of the following components in parts by weight: Polyether diol (PTMG): 50 parts, number average molecular weight 2000 g / mol; Isophorone diisocyanate (IPDI): 35 parts; 1,4-Butanediol (BDO) chain extender: 12 parts; Polycarbodiimide: 0.8 parts; Antioxidant 1076: 0.6 parts; UV absorber UV5411: 0.5 parts.

[0038] The TPU hot melt adhesive is composed of the following parts by weight: Polyether-type polyurethane: 100 parts, melt flow rate of 12 g / 10 min, melt viscosity of 9000 mPa.s.

[0039] A method for preparing a cold-resistant and flexible TPU barrier film and composite waterproof strip includes the following steps: Step (1), Preparation of polyurethane particles A: Step (11): Add antioxidants and UV absorbers to diol, heat to 100°C, disperse and dissolve evenly, and remove water by vacuum for 3 hours; Step (12): Add the above diol, chain extender, diisocyanate and polycarbodiimide to a twin-screw extruder, extrude the rubber compound through the die and cut it into small elliptical particles underwater. The extruder temperature is 110-240℃ (the temperature varies at different locations), the underwater pelletizing water temperature is 40-60℃, cool and form the granules, dehydrate them, and dry them at 70℃ for 3 hours to obtain polyurethane granules A. The melt flow rate is 8g / 10min and the melt viscosity is 25000mPa.s. Step (2): Disperse polyurethane granules A, TPEE granules, nano silica masterbatch, and SEBS rubber evenly, dry at 100℃ for 3 hours, and extrude through a casting machine to form a composite embossing roller. Cool to obtain a 0.05mm thick, cold-resistant, soft TPU barrier film. The temperature settings of the casting machine are as follows: extruder temperature 210℃, die temperature 210℃, filter temperature 220℃, composite pressure 6kg, and cooling temperature 10℃. Step (3): TPU hot melt adhesive is extruded through a casting machine and hot-laminated onto one side of the TPU barrier film. The thickness of the TPU hot melt adhesive is 0.05mm. At the same time, a matte release film is laminated. After 72 hours, the matte release film is separated, and the film is cut by a shearing machine to obtain a cold-resistant, soft, composite waterproof strip. The temperature settings of the casting machine are as follows: extruder temperature is 160℃; filter screen temperature is 160℃; die head temperature is 160℃.

[0040] Example 2 A windproof, waterproof, cold-resistant, and soft TPU barrier film for clothing, the barrier film being composed of the following components in parts by weight: Polyether / carbonate type polyurethane granules A: 90 parts, melt flow rate of 10 g / 10 min, melt viscosity of 23000 mPa.s; 10 parts of polyether-type TPEE granules, melt flow rate of 7 g / 10 min, melt viscosity of 12000 mPa·s. Nano silica masterbatch: 9 parts; SEBS rubber: 12 parts, melt flow rate of 4 g / 10 min, melt viscosity of 13500 mPa·s.

[0041] TPU barrier film polyurethane particles A, the particles are composed of the following components in parts by weight: Polyether diol (PTMG) (number average molecular weight 3000 g / mol): 45 parts; Polycarbonate diol (PCDL) (number average molecular weight 2000 g / mol): 13 parts; Isophorone diisocyanate (IPDI): 40 parts; 1,4-Butanediol (BDO) chain extender: 11 parts; 1,6-Hexanediol (HDO) chain extender: 3 parts; Polycarbodiimide: 0.8 parts; Antioxidant 1076: 0.6 parts; UV absorber UV5411: 0.5 parts; The TPU hot melt adhesive is composed of the following parts by weight: Polyether-type polyurethane: 70 parts, melt flow rate of 12 g / 10 min, melt viscosity of 9000 mPa·s; Polycaprolactone-based polyurethane: 30 parts, melt flow rate of 10 g / 10 min, melt viscosity of 12000 mPa·s.

[0042] A method for preparing a cold-resistant and flexible TPU barrier film and a composite waterproof strip includes the following steps: Step (1), Preparation of polyurethane particles A: Step (11): Add antioxidants and UV absorbers to diol, heat to 100°C, disperse and dissolve evenly, and remove water by vacuum for 3 hours; Step (12): Add the above diol, chain extender, diisocyanate and polycarbodiimide to a twin-screw extruder, extrude the rubber compound through the die and cut it into small elliptical particles underwater. The extruder temperature is 110-240℃ (the temperature varies at different locations), the underwater pelletizing water temperature is 40-60℃, cool and form the granules, dehydrate them, and dry them at 70℃ for 3 hours to obtain polyurethane granules A. The melt flow rate is 10g / 10min, and the melt viscosity is 23000mPa.s. Step (2): Disperse polyurethane granules A, TPEE granules, nano silica masterbatch, and SEBS rubber evenly, dry at 100℃ for 3 hours, and extrude through a casting machine to form a composite embossing roller. Cool to obtain a 0.07mm thick, cold-resistant, soft TPU barrier film. The temperature settings of the casting machine are as follows: extruder temperature 210℃, die temperature 210℃, filter temperature 220℃, composite pressure 6kg, and cooling temperature 10℃. Step (3): TPU hot melt adhesive is added according to the weight ratio and mixed evenly with high speed. It is then extruded through a casting machine and hot-laminated onto one side of the TPU barrier film. The thickness of the TPU hot melt adhesive is 0.05mm. At the same time, a matte release film is laminated. After 72 hours, the matte release film is separated, and the film is cut with a shearing machine to obtain a cold-resistant, soft, composite waterproof strip. The temperature settings of the casting machine are as follows: extruder temperature is 160℃; filter screen temperature is 160℃; die head temperature is 160℃.

[0043] Example 3 A windproof, waterproof, cold-resistant, and soft TPU barrier film for clothing, the barrier film being composed of the following components in parts by weight: Polyether / polycaprolactone polyurethane granules A: 75 parts, melt flow rate of 7 g / 10 min, melt viscosity of 28000 mPa·s; Polyether-type TPEE granules: 10 parts, melt flow rate of 6 g / 10 min, melt viscosity of 18000 mPa.s; Nano silica masterbatch: 12 parts; SEBS rubber: 12 parts, melt flow rate of 2 g / 10 min, melt viscosity of 18000 mPa.s.

[0044] TPU barrier film polyurethane particles A, the particles are composed of the following components in parts by weight: Polyether diol (PTMG) (number average molecular weight 4000 g / mol): 40 parts; Polycaprolactone diol (PCL) (number average molecular weight 2000 g / mol): 10 parts; Isophorone diisocyanate (IPDI): 32 parts; Hexamethylene diisocyanate (HDI): 5; 1,4-Butanediol (BDO) chain extender: 12 parts; Diethylene glycol (DWG) chain extender: 3 parts; Polycarbodiimide: 0.8 parts; Antioxidant 1076: 0.6 parts; UV absorber UV5411: 0.5 parts.

[0045] The TPU hot melt adhesive is composed of the following parts by weight: Polyether-type polyurethane: 55 parts, melt flow rate of 12 g / 10 min, melt viscosity of 9000 mPa·s; Polycaprolactone-based polyurethane: 45 parts, melt flow rate of 10 g / 10 min, melt viscosity of 12000 mPa·s.

[0046] A method for preparing a cold-resistant and flexible TPU barrier film and a composite waterproof strip includes the following steps: Step (1), Preparation of polyurethane particles A: Step (11): Add antioxidants and UV absorbers to diol, heat to 100°C, disperse and dissolve evenly, and remove water by vacuum for 3 hours; Step (12): Add the above diol, chain extender, diisocyanate, and polycarbodiimide to a twin-screw extruder. Extrude the compound through the die and underwater pelletize it into small elliptical particles. The extruder temperature is 110-240℃ (the temperature varies at different locations). The underwater pelletizing water temperature is 40-60℃. After cooling and forming the particles, dehydrate them and dry them at 70℃ for 3 hours to obtain polyurethane granules A. The melt flow rate is 7g / 10min, and the melt viscosity is 28000mPa·s. Step (2): Disperse polyurethane granules A, TPEE granules, nano silica masterbatch, and SEBS rubber evenly, dry at 100℃ for 3 hours, and extrude through a casting machine to form a composite embossing roller. Cool to obtain a 0.05mm thick, cold-resistant, soft TPU barrier film. The temperature settings of the casting machine are as follows: extruder temperature 210℃, die temperature 210℃, filter temperature 220℃, composite pressure 6kg, and cooling temperature 10℃. Step (3): TPU hot melt adhesive is added according to the weight ratio and mixed evenly with high speed. It is then extruded through a casting machine and hot-laminated onto one side of the TPU barrier film. The thickness of the TPU hot melt adhesive is 0.07mm. At the same time, a matte release film is laminated. After 72 hours, the matte release film is separated, and the film is cut with a shearing machine to obtain a cold-resistant, soft, composite waterproof strip. The temperature settings of the casting machine are as follows: extruder temperature is 160℃; filter screen temperature is 160℃; die head temperature is 160℃.

[0047] The cold-resistant soft composite waterproof strips prepared in Examples 1-3 and ordinary waterproof strips were pressed with a hot air blower at a temperature of 500℃, a pressure of 0.1mPa, an air volume of 0.07mPa, and a speed of 8m / min at the cross-stitch position of two layers of waterproof fabric, the cylindrical one-stitch position of the cuff, and the ordinary one-stitch position. After cooling for 120 minutes, they were tested according to the following test standards. The test results are shown in Table 1.

[0048] The performance of the composite waterproof strips prepared in Examples 1-3 and ordinary waterproof strips was determined using the following methods: 1) Water resistance test (cross-shaped ribs): Water washing is performed according to ISO 6330 requirements, 20 times in a washing machine at 40℃, each time for 60 minutes, and the hydrostatic pressure is tested according to ISO 811 requirements at 4000mmH2O / 2min.

[0049] 2) Evaluation of the feel of composite waterproof strips: Evaluation after 24 hours at 7℃, 4℃, 0℃, -5℃, -10℃, and -20℃; 3) Low temperature flexural resistance test (cuff cylinder one-piece bone position): The low temperature flexural resistance test shall be conducted in accordance with the requirements of GB / T-12586-2003, with 50,000 tests at temperatures of 4℃, 0℃, -5℃, -10℃, -20℃ and -40℃.

[0050] 4) Low temperature bending cold resistance test (ordinary one-line bone position): The low temperature bending cold resistance test is conducted according to the requirements of GB / T20991-2007, with 4000 tests at temperatures of 4℃, 0℃, -5℃, -10℃ and -20℃.

[0051] Table 1. Evaluation results of the feel of the composite waterproof strips prepared in Examples 1-3 and ordinary composite waterproof strips.

[0052] Table 2. Test results of water washing and low-temperature flexural resistance of composite waterproof strips prepared in Examples 1-3 and ordinary composite waterproof strips.

[0053] Table 3. Low-temperature bending and cold resistance test results of the composite waterproof strips prepared in Examples 1-3 and ordinary composite waterproof strips.

[0054] The above results demonstrate that the cold-resistant, soft, composite waterproof strip obtained by this invention is cold-resistant, soft, elastic, and exhibits good washability and water pressure resistance, while also providing strong adhesion to the coatings of two-layer windproof and waterproof clothing. Using this composite waterproof strip in the manufacture of two-layer windproof and waterproof clothing can effectively improve the problems of tape hardening and brittleness in low-temperature environments (-20℃ and below), as well as the dynamic twisting and cracking of the two layers of fabric at low temperatures, thus enhancing the consumer's wearing experience and showing great application potential.

[0055] The above description is merely a preferred embodiment of the present invention. However, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention should be covered within the scope of protection of the present invention.

Claims

1. A windproof, waterproof, cold-resistant, soft TPU barrier film for clothing, characterized in that, The components include the following parts by weight: Polyurethane granules A: 70-90 parts; Thermoplastic polyester elastomer granules: 10-30 parts; Nano silica masterbatch: 5-25 parts; SEBS rubber: 5-20 parts.

2. The windproof and waterproof cold-resistant soft TPU barrier film for clothing according to claim 1, characterized in that, The polyurethane granules A comprise the following components in parts by weight: Diols: 45–58 parts; Diisocyanate: 32-40 parts; Chain extender: 10-15 parts; Polycarbodiimide: 0.5–1.5 parts; Antioxidant: 0.1-1 part; UV absorber: 0.3-1 part.

3. The windproof and waterproof cold-resistant soft TPU barrier film for clothing according to claim 2, characterized in that, The number-average molecular weight of the diol is 1000-4000 g / mol.

4. The windproof and waterproof cold-resistant soft TPU barrier film for clothing according to claim 2, characterized in that, The diol is at least one of polytetrahydrofuran ether diol, polycaprolactone diol, polyester diol, and polycarbonate diol.

5. The windproof and waterproof cold-resistant soft TPU barrier film for clothing according to claim 2, characterized in that, The diisocyanate is at least one of isophorone diisocyanate and hexamethylene diisocyanate.

6. The windproof and waterproof cold-resistant soft TPU barrier film for clothing according to claim 2, characterized in that, The chain extender is at least one selected from 1,4-butanediol, 1,6-hexanediol, diethylene glycol, triethylene glycol, and dithiodipropionic acid.

7. A windproof and waterproof, cold-resistant, soft TPU barrier film for clothing according to any one of claims 1-6, characterized in that, The SEBS rubber is maleic anhydride-grafted SEBS rubber.

8. A composite waterproof strip, characterized in that, It consists of a cold-resistant and flexible TPU barrier film as described in any one of claims 1-7 and a TPU hot melt adhesive laminated on one side of the TPU barrier film.

9. A composite waterproof strip according to claim 8, characterized in that, The thickness of the TPU barrier film is 0.05-0.2 mm, and the thickness of the TPU hot melt adhesive is 0.03-0.15 mm.

10. A composite waterproof strip according to claim 8 or 9, characterized in that, The TPU hot melt adhesive is at least one of polyester polyurethane, polycaprolactone polyurethane, polycarbonate polyurethane, polyether polyurethane, and copolyether polyurethane.

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