CN113652768B

CN113652768B - Polyester network yarn and production process thereof

Info

Publication number: CN113652768B
Application number: CN202110983356.1A
Authority: CN
Inventors: 周小华; 王世建; 杨春雨
Original assignee: Hangzhou Huifeng Chemical Fiber Co ltd
Current assignee: Hangzhou Huifeng Chemical Fiber Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2023-05-23
Anticipated expiration: 2041-08-25
Also published as: CN113652768A

Abstract

The utility model relates to a synthetic fiber field, more specifically says, it relates to a polyester network silk and production technology thereof, the polyester network silk of this application includes sandwich layer fiber and cladding at the cortex outside the sandwich layer fiber, the cortex is mainly made by the raw materials of following parts by weight: 10-25 parts of cortex polyethylene terephthalate, 0.2-1 part of pore-forming agent and 1-3 parts of dispersing agent; the pore-forming agent consists of at least one of polyurethane and lignin and polymethacrylate according to the weight ratio of 2 (2-4). The application has the advantage of improving the adhesion performance of the dye on the polyester network yarn.

Description

Polyester network yarn and production process thereof

Technical Field

The application relates to the field of synthetic fibers, in particular to polyester network yarns and a production process thereof.

Background

Polyester is an important variety in synthetic fibers and is also a commodity name of polyester fibers in China, polyester is a fiber-forming high polymer which is prepared by taking poly terephthalic acid or dimethyl terephthalate and ethylene glycol as raw materials, carrying out esterification or transesterification and then carrying out polycondensation reaction, is also called poly ethylene terephthalate fibers, and the polyester network yarn prepared by adopting the polyester fibers has the advantages of high modulus, high strength, good elasticity and the like; at present, terylene has become the fiber variety with the most wide application and the largest consumption in China.

The Chinese patent with the application publication number of CN102330175A discloses a preparation method of nano calcium carbonate modified terylene low-stretch network yarn, which comprises the steps of preparing polycondensation modified polyester melt and POY ring blowing cooling process; in the preparation process of the polycondensation modified polyester melt, terephthalic acid and ethylene glycol monomers are adopted as raw materials, and a nano calcium carbonate modifier is added to prepare the modified copolyester melt, and the polyester melt is directly conveyed through the melt and is subjected to a POY ring blowing cooling process to prepare the nano calcium carbonate modified terylene low elastic network yarn.

For the above-described related art, the inventors consider that: after the prepared polyester low-elasticity network yarn is dyed, the dye is easy to fall off from the polyester network yarn when the polyester network yarn is cleaned, and the adhesion performance of the dye on the polyester network yarn is required to be improved.

Disclosure of Invention

In order to improve the adhesion performance of dye on polyester network yarns, the application provides polyester network yarns.

The polyester network yarn adopts the following technical scheme:

the polyester network yarn comprises core layer fibers and a skin layer coated outside the core layer fibers, wherein the skin layer is mainly prepared from the following raw materials in parts by weight: 10-25 parts of cortex polyethylene terephthalate, 0.2-1 part of pore-forming agent and 1-3 parts of dispersing agent; the pore-forming agent consists of at least one of polyurethane and lignin and polymethacrylate according to the weight ratio of 2 (2-4).

By adopting the technical scheme, the sheath layer is coated outside the core layer fiber to prepare the polyester fiber with the sheath-core structure, and the polyester network yarn is prepared by the polyester fiber; the arrangement of the core layer enables the prepared polyester fiber to have good mechanical properties; the arrangement of the dispersing agent improves the dispersity of the pore-forming agent on the skin layer, so that the pore-forming agent can be uniformly distributed on the polyester fiber when the skin layer is wrapped on the core layer fiber; the pore-forming agent (such as acetone) is used for dissolving the pore-forming agent, so that a porous structure is formed on the surface of the skin layer, and the pore formed on the surface of the skin layer is more uniform by adopting at least one of polyurethane and lignin and polymethacrylate to be matched with each other as the pore-forming agent; the contact area between the polyester fiber and the dye during dyeing is increased due to the arrangement of the porous structure, meanwhile, the surface of the polyester fiber is not smooth due to the porous structure, the dye is not easy to separate from the surface of the polyester fiber, and the adhesion performance of the dye on the polyester fiber is improved; thereby improving the adhesion performance of the dye on the polyester network yarn.

Preferably, the cortex is mainly prepared from the following raw materials in parts by weight: 15-20 parts of cortex polyethylene terephthalate, 0.2-0.6 part of pore-forming agent and 2-3 parts of dispersing agent; the pore-forming agent consists of at least one of polyurethane and lignin and polymethacrylate according to the weight ratio of 2 (2-4).

By adopting the technical scheme, the proportion of each raw material is optimized, the proportion of the pore-forming agent in the raw material for preparing the leather layer is adjusted, and the coloring performance of the prepared polyester network yarn is further improved by reasonably collocating the raw materials for preparing the leather layer.

Preferably, the pore-forming agent consists of polyurethane, lignin and polymethacrylate according to the weight ratio of 1:1 (2-4).

Through adopting above-mentioned technical scheme, adopt polyurethane, lignin and polymethacrylate as the pore-forming agent, dissolve polyurethane, lignin and polymethacrylate through pore-forming agent solvent (like acetone), simultaneously pore-forming agent solvent is to cortex polyethylene terephthalate and sandwich layer fibre all insoluble, this makes the cortex cladding form skin core structure on the sandwich layer fibre after, under polyurethane, lignin and polymethacrylate's mixed action for pore-forming agent dissolves the back, the aperture that polyester fiber cortex surface formed is more even, and then improves the adhesion effect of dyestuff on the polyester network silk of preparation, make the dyeing effect of polyester network silk better even.

Preferably, the raw materials for preparing the cortex layer also comprise 1-2 parts by weight of silver powder.

By adopting the technical scheme, silver powder is added into the cortex, silver powder can destroy bacterial cell membranes and attract the hydrophobic groups of enzyme proteins in bacterial bodies by releasing silver ions, and the silver ions and the hydrophobic groups are quickly combined together, so that the activity of intracellular bioactive enzymes is reduced, the intracellular proteins of bacteria are coagulated, the synthesis of DNA in the bacteria cells is interfered, the bacteria lose the capacity of splitting and proliferation, the antibacterial effect is achieved, and the dye has good adhesion performance on the prepared polyester network yarns and also has good antibacterial performance.

Preferably, the raw materials for preparing the cortex layer further comprise 1-3 parts by weight of methyl cellulose.

By adopting the technical scheme, the dye used in dyeing the polyester fiber contains amino, hydroxyl, azo groups and other groups, and the methylcellulose is added into the skin layer, so that a large number of hydroxyl groups are contained in the methylcellulose, and the hydroxyl groups in the methylcellulose can be combined with the dye to form hydrogen bonds, thereby improving the firmness of the dye retained on the skin layer and further improving the adhesion effect of the dye on the polyester network yarns.

In a second aspect, the present application provides a process for producing polyester network yarns, which adopts the following technical scheme:

a production process of polyester network yarn comprises the following steps:

s11: preparing core layer fibers;

s12: uniformly mixing the cortex polyethylene terephthalate, the pore-forming agent and the dispersing agent to prepare a mixture, and heating and melting the mixture to prepare a cortex impregnating solution;

s13: dipping the core layer fiber in the step S11 into the skin layer dipping liquid prepared in the step S12, and taking out to obtain a primary fiber; s14: drying the primary fiber in the step S13 to obtain a complex fiber; forming the sheath layer outside the core layer fiber after the sheath layer impregnating solution is dried;

s15: soaking the complex fiber prepared in the step S14 in a pore-forming agent solvent for 0.5-2h, taking out, and drying to obtain a primary finished fiber; the pore-forming agent solvent is used for eluting the pore-forming agent from the cortex;

s16: and (3) mounting the primary finished fiber prepared in the step (S15) on a primary yarn frame, and performing working procedures such as yarn cutting, a first roller, a deformation hot box, a cooling plate, a false twister, a second roller, a network device, a shaping hot box, a third roller, a yarn detector, oiling and winding on an oil tanker.

According to the technical scheme, the sheath layer impregnating solution is prepared in a melting mode, the core layer fiber is impregnated in the sheath layer impregnating solution, so that the sheath layer impregnating solution is uniformly adhered to the outer surface of the core layer fiber, and then the primary fiber is dried, so that the sheath layer impregnating solution forms a sheath layer outside the core layer fiber after being dried, and the prepared composite fiber has a sheath-core structure; then the pore-forming agent on the cortex is dissolved through the pore-forming agent solvent, so that the surface of the prepared primary product fiber has a porous structure, and then the polyester network yarn is prepared by processing the primary product fiber, so that the polyester network yarn also has a porous structure, the contact area of the polyester network yarn and the dye is increased through the porous structure, and the adhesion effect of the dye on the polyester network yarn is improved.

Preferably, the preparation method of the cortex comprises the following steps:

(1) Uniformly mixing cortex polyethylene terephthalate, a pore-forming agent and a dispersing agent to prepare a mixture;

(2) Heating the mixture obtained in the step (1) to a molten state, preserving heat to obtain a sheath impregnating solution, impregnating the core layer fibers in the sheath impregnating solution, taking out the core layer fibers, and drying the impregnated core layer fibers; the sheath impregnation liquid forms the sheath layer outside the core layer fiber after drying.

According to the technical scheme, the cortex polyethylene terephthalate, the pore-forming agent and the dispersing agent are melted to prepare the cortex impregnating solution, the cortex impregnating solution is wrapped outside the core layer fiber in an impregnating mode, and the core layer fiber wrapped with the cortex impregnating solution is dried to form the polyester fiber with the sheath-core structure; on the one hand, the mechanical strength of the prepared polyester fiber is ensured, and meanwhile, the pore-forming agent is used for manufacturing the porous structure on the surface of the skin layer, so that the contact area between the dye and the polyester fiber is increased, the adhesion performance of the dye on the polyester fiber is improved, and the polyester fiber with better dye adhesion effect and mechanical property is prepared.

Preferably, the dispersing agent consists of ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1 (2-3).

By adopting the technical scheme, in the preparation process of the skin-layer impregnating layer, the skin-layer polyethylene terephthalate, the pore-forming agent and the dispersing agent are melted, and the friction force exists between skin-layer polyethylene terephthalate molecules and pore-forming agent molecules, so that the fluidity of the pore-forming agent in the skin-layer polyethylene terephthalate is lower; the melted ethylene bis-stearamide and oxidized polyethylene wax have good lubricity and fluidity, and can drive the pore-forming agent to flow and disperse in the melted cortex polyethylene terephthalate, and the dispersibility of the pore-forming agent in the cortex impregnating solution is improved through the mixing effect of the oxidized polyethylene wax and the ethylene bis-stearamide, so that the uniformity of pore forming on the cortex is improved, and the adhesion performance of the dye on the prepared polyester network yarn is better.

In summary, the present application has the following beneficial effects:

the application adopts cortex polyethylene glycol terephthalate, pore-forming agent and dispersant to prepare into the cortex jointly, forms the polyester fiber that has sheath core structure through wrapping up the cortex on the sandwich layer fibre to through dissolving pore-forming agent makes the surface of cortex form porous structure, thereby improves the area of contact of cortex and dyestuff, porous structure also makes the dyestuff be difficult for breaking away from the polyester fiber, and then improves the adhesion effect of dyestuff on the polyester network silk of polyester fiber preparation.

Detailed Description

The present application is described in further detail below with reference to examples.

The core layer fiber is prepared from core layer polyethylene terephthalate through a melt spinning process, and the core layer polyethylene terephthalate is preferably injection molding grade polyethylene terephthalate produced by Shanghai benefit enhancement Co., ltd; the type is standard materials, and the melting point is 250-255 ℃;

the skin layer consists of skin layer polyethylene glycol terephthalate, pore-forming agent and dispersing agent; preferably, the used cortex polyethylene terephthalate is injection molding grade polyethylene terephthalate produced by Yukunlong plasticizing Co., ltd; the type is standard materials, and the melting point is 243 ℃;

the pore-forming agent comprises polyurethane, lignin and polymethacrylate, and preferably the polymethyl methacrylate is IF850 optical grade polymethyl methacrylate produced by Suzhou Dichenxin International trade company; preferably, the polyurethane used is polyurethane powder produced by the company Understand plastics, inc. of Dongyuan, having a particle size of 500 mesh; preferably, the lignin is lignin powder, and the CAS is 8068-03-9 with the purity of 99 percent;

preferably, the methylcellulose used is methylcellulose produced by Gaoqiu high-tech chemical materials limited company, and has methoxy content of 30%;

preferably, the dispersant used consists of ethylene bisstearamide and oxidized polyethylene wax; the ethylene bis-stearamide is ethylene bis-stearamide produced by Yinuo chemical technology Co., ltd., guangzhou, CAS:325925-3;

preferably, the oxidized polyethylene wax is prepared by Shanghai fish child industry Co., ltd, and has a purity of 99.9%;

preferably, the silver powder is nano silver powder produced by Tripterygium wilfordii alloy materials, inc. of Qinghai county, and the granularity is 1000 meshes;

preferably, the pore-forming agent solvent is acetone, and the acetone is industrial acetone produced by Yangzhou red star thermal insulation chemical plant, or is sold in the market to only dissolve polyurethane, lignin and polymethacrylate; the solvent may be any of polyethylene terephthalate, methylcellulose, and silver powder.

Preferably, when the pore-forming agent is composed of polyurethane, lignin and polymethacrylate together, the pore-forming agent in the application is composed of the sum of the weights of the polyurethane and lignin and the polymethacrylate according to the weight ratio of (2-4); it is further preferred that the porogen is made from polyurethane, lignin and polymethacrylate in a weight ratio of 1:1 (2-4).

Preparation example 1 of skin-layer impregnating solution

The preparation method of the skin impregnation liquid of the preparation example comprises the following steps:

(1) Adding 10kg of cortex polyethylene terephthalate, 0.2kg of pore-forming agent and 1kg of dispersing agent into a stirring barrel with stirring paddles, wherein the stirring speed of the stirring paddles is set to be 40r/min, and stirring for 20min to prepare a mixture; the pore-forming agent consists of polyurethane and polymethacrylate according to the weight ratio of 2:4; the dispersing agent is composed of ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1:2;

(2) The mixture prepared in the step (1) is put into a heating box, heating the heating box to 245 ℃ to melt the mixture in the heating box, and preserving heat to obtain the composite material.

Preparation example 2 of skin-impregnating solution

(1) 25kg of cortex polyethylene terephthalate, 1kg of pore-forming agent and 3kg of dispersing agent are added into a stirring barrel with stirring paddles, the stirring speed of the stirring paddles is set to be 40r/min, and the stirring is carried out for 20min, so as to prepare a mixture; the pore-forming agent consists of polyurethane and polymethacrylate according to the weight ratio of 2:4; the dispersing agent is composed of ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1:2;

(2) The mixture in the step (1) is put into a heating box, heating the heating box to 245 ℃ to melt the mixture in the heating box, and preserving heat to obtain the composite material.

Preparation example 3 of skin-impregnating solution

(1) Taking 17kg of cortex polyethylene terephthalate, 0.5kg of pore-forming agent and 2.5kg of dispersing agent, adding the mixture into a stirring barrel with stirring paddles, and stirring for 20min at a stirring rate of 40r/min to prepare a mixture; the pore-forming agent consists of polyurethane and polymethacrylate according to the weight ratio of 2:4; the dispersing agent consists of ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1:2;

Preparation example 4 of skin-impregnating solution

The present skin-layer dope preparation example is different from the skin-layer dope preparation example 3 in that the pore-forming agent used in the step (1) is composed of polyurethane and polymethacrylate in a weight ratio of 2:2, and the rest is the same as in the skin-layer dope preparation example 3.

Preparation example 5 of skin-layer impregnating solution

The skin-layer impregnating solution preparation example differs from the skin-layer impregnating solution preparation example 3 in that the pore-forming agent used in the step (1) is composed of polyurethane and polymethacrylate in a weight ratio of 2:3, and the rest is the same as in the skin-layer impregnating solution preparation example 3.

Preparation example 6 of skin-impregnating solution

The present skin-layer dope preparation example is different from the skin-layer dope preparation example 3 in that the pore-forming agent used in the step (1) is composed of lignin and polymethacrylate in a weight ratio of 2:3, and the rest is the same as in the skin-layer dope preparation example 3.

Preparation example 7 of skin-impregnating solution

The present skin-layer dope preparation example is different from the skin-layer dope preparation example 3 in that the pore-forming agent used in the step (1) is made of polyurethane, lignin and polymethacrylate in a weight ratio of 1:1:3, and the rest is the same as in the skin-layer dope preparation example 3.

Preparation example 8 of skin-impregnating solution

The present skin-layer dope preparation example is different from the skin-layer dope preparation example 7 in that the dispersant used in the step (1) is composed of ethylene bisstearamide and oxidized polyethylene wax in a weight ratio of 1:3, and the rest is the same as in the skin-layer dope preparation example 7.

Preparation example 9 of skin-impregnating solution

The present skin-layer dope preparation example was different from the skin-layer dope preparation example 9 in that 2kg of methylcellulose was added after adding polyethylene terephthalate, polymethyl methacrylate and a dispersant in the step (1), and the rest was the same as in the skin-layer dope preparation example 9.

Preparation example 10 of skin-impregnating solution

The present skin-layer dope preparation example was different from the skin-layer dope preparation example 10 in that 2kg of methyl cellulose was added in the step (1), and the rest was the same as in the skin-layer dope preparation example 10.

Preparation of skin-impregnating solution example 11

The present skin-layer dope preparation example was different from the skin-layer dope preparation example 10 in that 3kg of methyl cellulose was added in the step (1), and the rest was the same as in the skin-layer dope preparation example 10.

Preparation example 12 of skin-impregnating solution

The present skin-layer dope preparation example was different from the skin-layer dope preparation example 11 in that 1.5kg of silver powder was added after the methylcellulose was added in the step (1), and the rest was the same as in the skin-layer dope preparation example 11.

Example 1

The energy-saving and environment-friendly plastic spraying process of the embodiment comprises the following steps of:

s1: carrying out melt spinning on 10kg of core layer polyethylene glycol terephthalate by a melt spinning machine to obtain core layer fibers;

s2: taking 10kg of the sheath impregnating solution prepared in the sheath impregnating solution preparation example 1, impregnating the core layer fiber prepared in the step S1 into the sheath impregnating solution for 5 seconds, and then taking out the impregnated core layer fiber from the sheath impregnating solution to prepare a primary fiber; s3: drying the primary fiber prepared in the step S2 to prepare a complex fiber;

s4: taking 20kg of pore-forming agent solvent, completely soaking the complex fiber prepared in the step S3 in the pore-forming agent solvent for 2 hours, taking out the complex fiber from the pore-forming agent solvent, and drying to obtain a primary finished fiber;

s5: and (3) mounting the primary product fiber obtained in the step (S4) on a primary yarn frame, and performing working procedures such as yarn cutting, a first roller, a deformation hot box, a cooling plate, a false twister, a second roller, a network device, a shaping hot box, a third roller, a yarn detector, oiling and winding on an oil tanker.

Example 2

The process for producing the polyester network yarn of this example is different from that of example 1 in that the time for immersing the prepared conjugate fiber in the pore-forming agent solvent in step S4 is 0.5h, and the rest is the same as that of example 1.

Example 3

The process for producing the polyester network yarn of this example is different from that of example 1 in that the time for immersing the prepared conjugate fiber in the pore-forming agent solvent in step S4 is 1.5 hours, and the rest is the same as that of example 1.

Example 4

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 2, and the other steps are the same as those of embodiment 3.

Example 5

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 3, and the other steps are the same as those of embodiment 3.

Example 6

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 4, and the other is the same as that of embodiment 3.

Example 7

The process for producing the polyester interlaced yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 5, and the other steps are the same as those of embodiment 3.

Example 8

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 6, and the other is the same as that of embodiment 3.

Example 9

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 7, and the other is the same as that of embodiment 3.

Example 10

The process for producing the polyester interlaced yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 8, and the other steps are the same as those of embodiment 3.

Example 11

The process for producing the polyester interlaced yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 9, and the other steps are the same as those of embodiment 3.

Example 12

The process for producing the polyester network yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 10, and the other is the same as that of embodiment 3.

Example 13

The process for producing the polyester interlaced yarn of this example is different from that of example 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 11, and the other is the same as that of example 3.

Example 14

The process for producing the polyester interlaced yarn of the present embodiment is different from that of embodiment 1 in that the sheath impregnating solution used in step S2 is the sheath impregnating solution prepared in the sheath impregnating solution preparation example 12, and the other steps are the same as those of embodiment 3.

Comparative example

Comparative example 1

The difference between the present comparative example 1 and example 1 is that the sheath impregnating solution in the polyester network yarn does not contain a pore-forming agent, that is, the comparative example 1 does not contain step S4, that is, after the complex fiber is produced in step S3, the complex fiber is directly treated by the treatment step in step S5, and the other steps are the same as in example 1.

Comparative example 2

The comparative example 2 is different from example 1 in that the pore-forming agent contained in the sheath impregnating solution in the polyester network yarn is polyvinylpyrrolidone, the pore-forming agent solvent is water, and the other is the same as in example 1.

Performance test

The direct dye in the test is a direct dye produced by the Chenya chemical industry Co., ltd, the intensity is 100 minutes, and the chromatic light is brown; taking 1kg of each of the samples prepared in examples 1-14 and comparative examples 1-2, and measuring the water-washing resistance of the samples in examples 1-14 and comparative examples 1-2 by using a method of ISO105C06:1994+Corl:2002 and naturally airing the samples at 25 ℃; the high temperature dyeing coloring rate of the samples in examples 1-14 and comparative examples 1-2 is measured by adopting the national standard GB/T9337-2009; the test results are shown in Table 1.

Table 1 results of dye-uptake and wash fastness test of the polyester network yarns prepared in examples 1 to 14 and comparative examples 1 to 2

	Dye uptake rate	Resistance to washing with water
			Example 1	89.3	3
Example 2	84.6	3
			Example 3	92.9	4
Example 4	93.3	4
			Example 5	95.1	4
Example 6	94.4	4
			Example 7	95.6	4
Example 8	93.2	4
			Example 9	96.7	5
Example 10	95.3	5
			Example 11	97.2	5
Example 12	97.6	5
			Example 13	97.2	5
Example 14	97.1	5
			Comparative example 1	77.6	3
Comparative example 2	82.8	4

By combining examples 5-9 and comparative example 1 and combining table 1, it can be seen that by adding the pore-forming agent into the skin-layer impregnating solution of the prepared polyester network yarn and dissolving the pore-forming agent, the surface of the prepared polyester network yarn forms a porous structure, the contact area of the polyester network yarn and the dye is increased, the adhesion effect of the dye on the polyester network yarn is improved, the dye uptake and the water-washing resistance of the polyester network yarn are further improved, and when the added pore-forming agent consists of polyurethane, lignin and polymethacrylate according to the weight ratio of 1:1:3, the dye uptake and the water-washing resistance of the prepared polyester network yarn are optimal.

As can be seen from the combination of example 9 and comparative example 2 and the combination of table 1, the dye uptake and the water resistance of the prepared polyester network yarn are both superior to those of the polyester network yarn prepared by using polyvinylpyrrolidone as the pore-forming agent by adding the pore-forming agent consisting of polyurethane, lignin and polymethacrylate according to the weight ratio of 1:1:3.

It can be seen from the combination of examples 11 to 13 and comparative example 2 and the combination of table 1 that the addition of methyl cellulose can improve the firmness of the dye adhesion on the polyester network yarns by adding methyl cellulose into the core layer fibers of the prepared polyester network yarns; meanwhile, as can be seen from the dye-uptake of comparative examples 11 to 13, when the added methylcellulose is 2kg, the dye-uptake of the prepared polyester network yarn is best, and the washing resistance is also better.

As can be seen from the combination of examples 9-10 and Table 1, when the dispersing agent added in the prepared polyester network yarn is prepared from ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1:2, the dye-uptake of the prepared polyester network yarn is optimal, and the washing resistance is also good.

The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.

Claims

1. The utility model provides a dacron network silk which characterized in that: the composite material comprises core layer fibers and a skin layer coated outside the core layer fibers, wherein the skin layer is mainly prepared from the following raw materials in parts by weight: 10-25 parts of cortex polyethylene terephthalate, 0.2-1 part of pore-forming agent and 1-3 parts of dispersing agent; the pore-forming agent consists of polyurethane, lignin and polymethacrylate according to the weight ratio of 1:1 (2-4); the core layer fiber is prepared from core layer polyethylene glycol terephthalate by a melt spinning process;

the preparation method of the cortex comprises the following steps of;

(2) Heating the mixture obtained in the step (1) to a molten state, preserving heat to obtain a sheath impregnating solution, impregnating the core layer fibers in the sheath impregnating solution, taking out the core layer fibers, and drying the impregnated core layer fibers; forming the sheath layer outside the core layer fiber after the sheath layer impregnating solution is dried; the raw materials for preparing the cortex also comprise 1-3 parts by weight of methyl cellulose; and (3) dissolving the pore-forming agent by using a pore-forming agent solvent acetone to form a porous structure on the skin layer.

2. The polyester network yarn according to claim 1, wherein: the raw materials for preparing the cortex also comprise 1-2 parts by weight of silver powder.

3. A process for producing polyester network yarns according to claim 1, which is characterized in that: the method comprises the following steps:

s11: preparing core layer fibers;

s13: dipping the core layer fiber in the step S11 into the skin layer dipping liquid prepared in the step S12, and taking out to obtain a primary fiber;

s14: drying the primary fiber in the step S13 to obtain a complex fiber; forming the sheath layer outside the core layer fiber after the sheath layer impregnating solution is dried;

s16: and (3) mounting the primary finished fiber prepared in the step S15 on a primary silk frame, and performing processes of shredding, first roller, deformation hot box, cooling plate, false twister, second roller, network device, shaping hot box, third roller, silk detector, oil tanker oiling and winding to obtain the final product.

4. The polyester network yarn according to claim 1, wherein: the dispersing agent consists of ethylene bis-stearamide and oxidized polyethylene wax according to the weight ratio of 1 (2-3).