Fluorine-free waterproof polyester DTY fiber and application thereof

Abstract

The invention discloses a fluoride-free waterproof polyester DTY fiber and application thereof.The fluoride-free waterproof polyester DTY fiber is prepared from polyester and a waterproof agent, and the waterproof agent is prepared by mixing acrylate copolymer, trimerization 1, 2-propylene glycol, isopropanol, 2, 4-toluene diisocyanate, adipic acid dihydrazide, fatty acid macrogol ester, fatty alcohol polyoxyethylene and water. The waterproof agent in the fluoride-free waterproof polyester DTY fiber does not contain harmful substances such as fluorine, is high in safety and conforms to the existing environmental protection regulations; the preparation process is simple and easy to control, the treatment cost of waste liquid generated by subsequent padding is avoided, and the method is more economical and environment-friendly; the prepared fabric has the characteristics of softness, breathability and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a fluorine-free waterproof polyester DTY fiber and application thereof. Background Art

[0002] Waterproof fibers and fabrics are popular in the fields of waterproof rain gear and clothing due to their waterproof function. However, as people's quality of life improves, the performance requirements for waterproof products have become more stringent. In addition to the waterproof function, consumers have also begun to pay attention to the cost-effectiveness of products as well as the safety, durability and comfort of products. At present, most waterproof products on the market adopt the fabric finishing method, and the fluorine-containing waterproof agent is attached to the surface of the fabric by coating to achieve the waterproof effect. A small number of products add fluorine-containing waterproof masterbatch during the spinning stage, and then weave after preparing fibers with waterproof effect. The former is easier to implement and has lower requirements for equipment and technology, but it performs poorly in terms of air permeability, feel and durability. At the same time, because the waterproof agent contains harmful substances such as fluorine, its safety is poor and is restricted by environmental regulations. The latter has more durable waterproof performance, better feel and air permeability, simplifies the production process, and avoids subsequent coating and lamination processes. However, this method has high requirements for spinning and texturing equipment and technology, and the masterbatch cost is also high. In addition, because the waterproof masterbatch used contains fluorine, there are also safety issues and environmental regulations.

[0003] Therefore, under the premise of ensuring that the fabric is waterproof, developing a waterproof fiber and fabric that are simultaneously safe, washable, economical, soft and breathable will have great market value. CN111877003A discloses a kind of anti-wicking waterproof FDY fiber and preparation method thereof. The method first adopts a spinning oil with waterproofness, imitates the way of oiling in the fiber spinning process, and realizes the uniform attachment of waterproof oil on the fiber surface. Then a plum blossom-shaped spinneret is used for spinning, and an anti-wicking waterproof fiber FDY is prepared by multiple oiling and drafting processes. CN106283608A discloses a kind of preparation method of breathable water-repellent fiber, the method first adopts a cross spinneret for spinning, then uses polyester chips as raw materials, utilizes a waterproof oil treatment solution to replace the spinning oil, and adopts FDY spinning process to prepare breathable water-repellent fiber.

[0004] Although the above prior art gives the fiber and fabric waterproof performance, economy and breathability, the waterproofing agents used all contain fluorine, so safety is not improved. At the same time, the generated products are all FDY, and the fluffy and soft feel of the silk and fabric is insufficient. Summary of the invention

[0005] The present invention aims to overcome the defects of the prior art and provide a fluorine-free waterproof polyester DTY fiber.

[0006] Another object of the present invention is to provide an application of the fluorine-free waterproof polyester DTY fiber.

[0007] The technical solution of the present invention is as follows:

[0008] A fluorine-free waterproof polyester DTY fiber is prepared from polyester and a waterproofing agent, wherein the waterproofing agent is prepared by mixing components including acrylate copolymer, trimerized 1,2-propylene glycol, isopropyl alcohol, 2,4-toluene diisocyanate, adipic acid dihydrazide, fatty acid polyethylene glycol ester, fatty alcohol polyoxyethylene and water;

[0009] The preparation method comprises: preparing POY by pelletizing polyester, and then preparing a silk ingot by sequentially stretching, heating deformation, false twisting, heating setting, applying the waterproof agent and adding elasticity, and then heating and cross-linking the silk ingot and cooling it to obtain the obtained silk ingot.

[0010] In a preferred embodiment of the present invention, the waterproofing agent is prepared by mixing acrylate copolymer, trimerized 1,2-propylene glycol, isopropyl alcohol, 2,4-toluene diisocyanate, adipic acid dihydrazide, fatty acid polyethylene glycol ester, fatty alcohol polyoxyethylene and water.

[0011] In a preferred embodiment of the present invention, the mass percentages of the components in the waterproofing agent are as follows:

[0012] Acrylate copolymer 19-31%

[0013] 1,2-Propylene glycol trimer 5-15%

[0014] Isopropyl alcohol 0.5-0.8%

[0015] 2,4-Toluene diisocyanate 1-2%

[0016] Adipic acid dihydrazide 1-2%

[0017] Fatty acid polyethylene glycol esters 13-24%

[0018] Fatty alcohol polyoxyethylene 4-7%

[0019] The balance is water.

[0020] Further preferably, in each component of the waterproofing agent, the mass ratio of 2,4-toluene diisocyanate to adipic acid dihydrazide is 1:1.

[0021] More preferably, the monomer of the acrylic ester copolymer is at least one of octadecyl acrylate, butyl acrylate, methyl methacrylate, allyl methacrylate and hydroxyethyl methacrylate.

[0022] More preferably, the monomers of the acrylic ester copolymer consist of octadecyl acrylate, butyl acrylate and hydroxyethyl methacrylate.

[0023] In a preferred embodiment of the present invention, the drawing and false twisting rates are 550-700 m / min, the false twist ratio is 1.7-1.9, the heating deformation temperature is 180-190°C, the heating setting temperature is 150-165°C, and the heating cross-linking temperature is 165-180°C.

[0024] In a preferred embodiment of the present invention, the waterproofing agent is applied in the form of an oil tanker, and the rotation speed of the oil tanker is 0.55-0.70 rpm.

[0025] A waterproof fabric is woven from raw materials including the fluorine-free waterproof polyester DTY fiber.

[0026] The use of the fluorine-free waterproof polyester DTY fiber in preparing waterproof fabrics.

[0027] The beneficial effects of the present invention are:

[0028] 1. The waterproofing agent in the fluorine-free waterproof polyester DTY fiber of the present invention does not contain harmful substances such as fluorine, has high safety, and complies with existing environmental protection laws and regulations.

[0029] 2. The preparation process of the present invention is simple and easy to control, avoiding the waste liquid treatment costs generated by subsequent padding, which is more economical and environmentally friendly.

[0030] 3. The fluorine-free waterproof polyester DTY fiber of the present invention has excellent and durable waterproof performance, and the prepared fabric has the characteristics of softness and breathability. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further illustrated and described below through specific implementation methods.

[0032] The acrylic acid ester copolymers in the following examples are all polyoctadecyl acrylate-butyl acrylate-hydroxyethyl methacrylate. The specific preparation method is referred to "Synthesis and Application Performance of Fluorine-free Water-repellent Finishing Agent" (Wang Wei, Master's thesis of Soochow University, pages 38-39).

[0033] Example 1

[0034] Preparation of waterproofing agent: weigh 285.0 g of acrylate copolymer, 75.0 g of trimer 1,2-propylene glycol, 7.5 g of isopropyl alcohol, 15.0 g of 2,4-toluene diisocyanate, 15.0 g of adipic acid dihydrazide, 360.0 g of fatty acid polyethylene glycol ester, 105.0 g of fatty alcohol polyoxyethylene and 637.5 g of water, and mix well to prepare the waterproofing agent.

[0035] After the polyester is pelletized into POY, it is sequentially subjected to drawing, heat deformation, false twisting, heat setting, application of the above-mentioned waterproofing agent by means of a tanker, winding and other texturizing processes to prepare a silk ingot, which is then placed in a special oven for heating and cross-linking for 30 minutes, the temperature is controlled at 165°C, and after cooling, a fluorine-free waterproof polyester DTY fiber is obtained, wherein the drawing rate is 700m / min, the heat deformation temperature is 180°C, the false twist ratio is 1.90, the heat setting temperature is 150°C, and the tanker speed is 0.55rpm.

[0036] Example 2

[0037] Preparation of waterproofing agent: Weigh 390.0g of acrylate copolymer, 165.0g of trimer 1,2-propylene glycol, 10.5g of isopropanol, 22.5g of 2,4-toluene diisocyanate, 22.5g of adipic acid dihydrazide, 225.0g of fatty acid polyethylene glycol ester, 90.0g of fatty alcohol polyoxyethylene and 574.5g of water, and mix them evenly to prepare the waterproofing agent.

[0038] After the polyester is pelletized into POY, it is sequentially subjected to drawing, heat deformation, false twisting, heat setting, application of the above-mentioned waterproofing agent by means of a tanker, winding and other texturizing processes to prepare a silk ingot, which is then placed in a special oven for heating and cross-linking for 50 minutes, the temperature is controlled at 180°C, and after cooling, a fluorine-free waterproof polyester DTY fiber is obtained, wherein: the drawing rate is 650m / min, the heat deformation temperature is 188°C, the false twist ratio is 1.85, the heat setting temperature is 155°C, and the tanker speed is 0.65rpm.

[0039] Example 3

[0040] Preparation of waterproofing agent: Weigh 465.0 g of acrylate copolymer, 225.0 g of trimer 1,2-propylene glycol, 12.0 g of isopropyl alcohol, 30.0 g of 2,4-toluene diisocyanate, 30.0 g of adipic acid dihydrazide, 195.0 g of fatty acid polyethylene glycol ester, 60.0 g of fatty alcohol polyoxyethylene and 483.0 g of water, and mix well to prepare the waterproofing agent.

[0041] After the polyester is pelletized into POY, it is sequentially subjected to drawing, heat deformation, false twisting, heat setting, application of the above-mentioned waterproofing agent by means of a tanker, winding and other texturizing processes to prepare a silk ingot, which is then placed in a special oven for heating and cross-linking for 60 minutes, the temperature is controlled at 180°C, and after cooling, a fluorine-free waterproof polyester DTY fiber is obtained, wherein the drawing rate is 550m / min, the heat deformation temperature is 190°C, the false twist ratio is 1.70, the heat setting temperature is 165°C, and the tanker speed is 0.70rpm.

[0042] Comparative Example 1

[0043] After the polyester is pelletized into POY, it is then prepared into a silk ingot through stretching, heat deformation, false twisting, heat setting, oiling, winding and other texturizing processes. The silk ingot is then placed in a special oven for heating and cross-linking for 30 minutes, and the temperature is controlled at 165°C. After cooling, polyester DTY fiber (comparative sample 1) is obtained, wherein the stretching rate is 700m / min, the heat deformation temperature is 180°C, the false twist ratio is 1.85, the heat setting temperature is 155°C, the oil agent is a conventional DTY oil agent, and the oil wheel speed is 0.65rpm.

[0044] The waterproof polyester DTY fibers prepared in the above examples and comparative examples were woven into cloth, and then washed, dyed, shaped, and tested for performance. Conventional waterproof cloth on the market was used as comparative sample 2, and the waterproof performance was tested in accordance with the national standard GB / T 4745-2012; the fiber dyeing performance test was in accordance with GB / T250-2008, and the test data is shown in Table 1.

[0045] Table 1 Performance test data of examples and comparative samples

[0046]

[0047] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A fluorine-free waterproof polyester DTY fiber, characterized in that: The invention is prepared from polyester and a waterproofing agent, wherein the waterproofing agent is prepared by mixing components including an acrylate copolymer, trimerized 1,2-propylene glycol, isopropyl alcohol, 2,4-toluene diisocyanate, adipic acid dihydrazide, fatty acid polyethylene glycol ester, fatty alcohol polyoxyethylene and water; The preparation method comprises: preparing POY by pelletizing polyester, and then preparing a silk ingot by sequentially stretching, heating deformation, false twisting, heating setting, adding the waterproof agent and adding elasticity, and then heating and cross-linking the silk ingot and cooling it to obtain the obtained POY.

2. The fluorine-free waterproof polyester DTY fiber according to claim 1, characterized in that: The waterproofing agent is prepared by mixing acrylate copolymer, trimerized 1,2-propylene glycol, isopropyl alcohol, 2,4-toluene diisocyanate, adipic acid dihydrazide, fatty acid polyethylene glycol ester, fatty alcohol polyoxyethylene and water.

3. A fluorine-free waterproof polyester DTY fiber as claimed in claim 1 or 2, characterized in that: The mass percentages of the components in the waterproofing agent are as follows: Acrylate copolymer 19-31% 1,2-Propylene glycol trimer 5-15% Isopropyl alcohol 0.5-0.8% 2,4-Toluene diisocyanate 1-2% Adipic acid dihydrazide 1-2% Fatty acid polyethylene glycol esters 13-24% Fatty alcohol polyoxyethylene 4-7% The balance is water.

4. The fluorine-free waterproof polyester DTY fiber according to claim 3, characterized in that: Among the components of the waterproofing agent, the mass ratio of 2,4-toluene diisocyanate to adipic acid dihydrazide is 1:

1.

5. The fluorine-free waterproof polyester DTY fiber according to claim 3, characterized in that: The monomer of the acrylic ester copolymer is at least one of octadecyl acrylate, butyl acrylate, methyl methacrylate, allyl methacrylate and hydroxyethyl methacrylate.

6. The fluorine-free waterproof polyester DTY fiber according to claim 5, characterized in that: The monomers of the acrylic ester copolymer consist of octadecyl acrylate, butyl acrylate and hydroxyethyl methacrylate.

7. The fluorine-free waterproof polyester DTY fiber according to claim 1, characterized in that: The drafting and false twisting rates are 550-700 m / min, the false twist ratio is 1.7-1.9, the heating deformation temperature is 180-190°C, the heating setting temperature is 150-165°C, and the heating cross-linking temperature is 165-180°C.

8. The fluorine-free waterproof polyester DTY fiber according to claim 7, characterized in that: The above-mentioned waterproofing agent is in the form of an oil tanker, and the rotation speed of the oil tanker is 0.55-0.70rpm.

9. A waterproof fabric, characterized in that: The invention is woven from raw materials including the fluorine-free waterproof polyester DTY fiber described in any one of claims 1 to 8.

10. Use of the fluorine-free waterproof polyester DTY fiber according to any one of claims 1 to 8 in the preparation of waterproof fabrics.

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