Polyester cotton-like blended yarn and its production process

Abstract

The application discloses polyester cotton-like blended yarn and a production process thereof. The blended yarn comprises porel fibers and cotton fibers in a blending ratio of (70-80):(20-30). The porel fibers are pretreated by polyoxyethylene ether antistatic agent. The mass ratio of the polyoxyethylene ether antistatic agent to the porel fibers is (0.02-0.03):1. The polyoxyethylene ether antistatic agent contains carboxyl groups on the molecular chain. The pretreatment of the polyoxyethylene ether antistatic agent can form a continuous conductive film on the surface of the porel fibers. The hydrogen bonds are formed between the carboxyl groups and the hydrophilic groups in the fibers, so that the binding force between the antistatic layer and the fibers is improved, the antistatic property of the fabric is improved, the spinnability of the fibers is improved, the existing anions can be combined with cationic dyes through electrostatic action, and the dyeing rate and the dyeing depth of the porel fibers are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of polyester blended yarn, in particular to a polyester cotton-like blended yarn and a production process thereof. BACKGROUND

[0002] With the continuous improvement of people's requirements for the quality of life, in the field of clothing, people's praise for natural fibers is also more obvious, but in the raw materials used in the textile field in China, the supply of cotton fibers far cannot meet people's needs. Polyester and polyester fiber develops rapidly, and the research on its super cotton-like technology overcomes some common shortcomings of polyester fiber and combines some excellent properties of cotton, which has the excellent properties of cotton and polyester, and achieves the effect of cotton-like and better than cotton.

[0003] Among them, porel fiber is a modified polyester fiber with an inner cavity similar to an animal capillary. The modification of porel fiber starts from the molecular structure of polyester, and hydrophilic groups and flexible groups are introduced into the chemical polymer macromolecule to produce modified polyester chips, and then the fiber with capillary inner cavity is spun. It has the characteristics of light and fluffy, no itching feeling when contacting the skin, heat insulation and temperature regulation, moisture permeability, and not easy to ball. However, in the process of color spinning, porel fiber has the defects of low dyeing depth and easy staining of un-dyed porel fiber during washing after spinning and weaving, and in the process of spinning, due to the large specific resistance of porel fiber, the moisture absorption performance is not good, and the static electricity is formed by the mutual friction between the fibers and the machine, which seriously affects the spinnability of the fiber. SUMMARY

[0004] In order to solve the problems of low dyeing depth and poor spinnability of porel polyester cotton-like fiber in the dyeing process, the present application provides a polyester cotton-like blended yarn and a production process thereof.

[0005] In the first aspect, the present application provides a polyester cotton-like blended yarn, which comprises porel fiber and cotton fiber with a blending ratio of (70-80):(20-30), the porel fiber is pretreated with polyoxyethylene ether antistatic agent, the mass ratio between the polyoxyethylene ether antistatic agent and the porel fiber is (0.02-0.03):1, and the polyoxyethylene ether antistatic agent contains carboxyl groups on the molecular chain.

[0006] By using the above technical solution, the cotton-like blended yarn obtained by blending porel fiber and cotton fiber not only has the excellent properties of cotton and the skin feeling of cotton, but also can maximize the performance of porel fiber, dynamically regulate and control the heat and humidity balance of the human body in different environments and states, and the fabric made of porel fiber and cotton fiber blended yarn has the excellent properties of cotton and polyester, which can meet people's demand for cotton fiber.

[0007] In order to prevent porel fibers from generating static electricity in the process of blending yarn, and to prevent problems such as blocking, sticking, and winding the skin roll in the production process, the porel fibers are subjected to antistatic treatment before dyeing. The antistatic agent used is a polyoxyethylene ether antistatic agent, which can form a continuous conductive film on the surface of the porel fibers, improve the antistatic properties of the fabric, and at the same time, due to the introduction of hydrophilic groups into the polyester fibers during the modification of the porel fibers, the carboxyl groups on the molecular chain of the polyoxyethylene ether antistatic agent form hydrogen bonds with the porel fibers, which can make the antistatic agent and the porel fibers more closely combined together, so that the antistatic film is not easy to fall off during dyeing and subsequent production processes, and the antistatic effect is lost. And in the dyeing process, the polyoxyethylene ether antistatic agent used in the present application is an anionic surfactant, which contains acetate ions that can attract dyes to porel fibers to improve the dyeing depth of porel fibers, thereby enhancing the spinnability of porel fibers while improving the dyeability of porel fibers, and obtaining a blended yarn with excellent performance.

[0008] Preferably, the raw materials of the polyoxyethylene ether antistatic agent include fatty alcohol polyoxyethylene ether, sodium hydroxide and sodium chloroacetate in a mass ratio of 100: (5-6): (25-28).

[0009] By using the above technical solution, the fatty alcohol polyoxyethylene ether is first subjected to alkalization reaction under the action of sodium hydroxide, and then subjected to carboxymethylation reaction with sodium chloroacetate. In aqueous solution, the molecular chain contains acetate ions, which can strengthen the attraction between the dye and the porel fibers, and improve the dyeing rate of the porel fibers. The most important thing is that the formed polyoxyethylene ether antistatic agent can form a continuous conductive film on the surface of the porel fibers, and at the same time, it will not affect the properties of the porel fibers itself, and it can improve the antistatic properties of the porel fibers, and improve the comfort and moisture absorption performance of the fibers, and further improve the spinnability of the porel fibers.

[0010] Preferably, the polyoxyethylene ether antistatic agent is prepared by the following method:

[0011] Pretreatment of fatty alcohol polyoxyethylene ether: hydrogen peroxide and catalyst A are added to the fatty alcohol polyoxyethylene ether, the temperature is adjusted to 30-40℃, and after stirring and mixing for 0.5-1h, oxygen is introduced, and the temperature is adjusted to 60-80℃ under oxygen atmosphere, and stirring reaction is carried out for 4-5h to obtain pretreated fatty alcohol polyoxyethylene ether;

[0012] Preparation of polyoxyethylene ether antistatic agent: the pretreated aliphatic polyoxyethylene ether is raised to 100-110℃, while adding sodium hydroxide, stirring under nitrogen atmosphere for 1.5-2h; then adjusting the temperature to 60-65℃, adding sodium chloroacetate, raising the temperature to 85-90℃ under nitrogen atmosphere, stirring for 4-5h, and finally obtaining the polyoxyethylene ether antistatic agent through filtration and vacuum distillation.

[0013] Preferably, the average polymerization degree of the aliphatic polyoxyethylene ether is 7-9.

[0014] Preferably, the mass ratio of hydrogen peroxide to aliphatic polyoxyethylene ether is (0.08-0.12):1.

[0015] Preferably, the catalyst A is tert-butyl hydroperoxide, and the addition amount of the catalyst A is 0.2-0.5% of the mass of the fatty alcohol polyoxyethylene ether.

[0016] By adopting the above technical solution, the aliphatic polyoxyethylene ether is pretreated before reaction, specifically, the terminal fatty alcohol of the aliphatic polyoxyethylene ether is oxidized into aldehyde or ketone under the oxidation of hydrogen peroxide, and then is continuously oxidized into carboxyl under oxygen atmosphere;

[0017] Then, in the process of alkalization reaction of the pretreated aliphatic polyoxyethylene ether and sodium hydroxide, an active center oxygen anion is formed, which can further perform nucleophilic substitution reaction with sodium chloroacetate in the process of carboxymethylation, introducing acetate ions into the obtained polyoxyethylene ether antistatic agent, so that the obtained polyoxyethylene ether antistatic agent can form a layer of conductive film with compact structure and strong binding force on the surface of porel fiber, wherein the carboxyl groups contained therein can improve the affinity with porel fiber, the acetate ions provide the main anions, and can also enhance the attraction with dyes, thereby improving the dyeing rate and dye depth of porel fiber, and the combined dye molecules are stable on the surface of porel fiber and will not fall off due to external force during the processing and use.

[0018] In the second aspect, the application provides a production process of polyester cotton-like blended yarn, which comprises the following process steps:

[0019] S1. The polyoxyethylene ether antistatic agent is added to water to prepare an antistatic agent aqueous solution with a mass fraction of 3-5%, which is uniformly sprayed on the surface of porel fiber, and then the porel fiber is tightly wrapped with plastic film for 24-30h to obtain pretreated porel fiber.

[0020] S2. The obtained pretreated porel fiber is added into a dyeing solution with a bath ratio of 1: (10-20), the pH value of the solution is adjusted to 5-6, the temperature is raised to 90-100°C at a rate of 1-2°C / min, and the temperature is kept for 5-10 min, then the temperature is raised to 130-135°C at a rate of 1-2°C / min, and the temperature is kept for 25-30 min, then the temperature is reduced to 80-85°C at a rate of 2-4°C / min, and after washing, the fiber is reduced cleaned by a reducing cleaning solution, and finally the fiber is washed and dried to obtain a dyed porel fiber; wherein the temperature in the reducing cleaning process is adjusted to 75-80°C, the temperature is kept for 20-30 min, and the bath ratio is 1: (15-20);

[0021] S3. The obtained dyed porel fiber is mixed with cotton fiber according to a blending ratio by using a disc blending process to obtain a mixed fiber;

[0022] S4. The mixed fiber is subjected to opening and cleaning treatment, wherein the rotating speed of the opening machine comb needle beater is 460-500, the cotton lap weight is 390-410 g / m, and the cotton lap roller speed is 11.5-12.5 r / min;

[0023] S5. The fiber is subjected to carding treatment by using an A186F carding machine, wherein the speed of the cylinder is reduced to 330-370 r / min, the sliver weight is 19.5-22.5 g / 5 m, and the speed of the licker-in roller is 680-880 r / min;

[0024] S6. Drawing: an antistatic rubber roller is used, the number of combined fibers is 7-8, the weight is 16-18 g / 5 m, and the sliver speed is 180-210 m / min;

[0025] S7. Roving: the roving twist is 4.3-4.7 twists / 10 cm, the draft ratio in the back draft zone is 1.2-1.3, the roller gauge is 9 / 23 / 29 mm, and the front roller speed is 170-210 r / min;

[0026] S8. Spinning: the twist factor of the spun yarn is 360-380, and the front roller speed is 160-200 r / min;

[0027] S9. Winding: the yarn is wound into a conical tube on an automatic winding machine, and a polyester cotton-like blended yarn is obtained.

[0028] Preferably, the reducing cleaning solution comprises 2-4 g / L of sodium hydroxide and 3-4 g / L of sodium hydrosulfite.

[0029] By adopting the above technical scheme, the porel fiber is pretreated before dyeing, and is infiltrated by spraying the water solution of the antistatic agent, so that the moisture regain of the porel fiber is improved, the hollow capillary of the porel fiber is filled with sufficient moisture and reaches a saturated state after the pretreatment, the strength of the porel fiber is enhanced, the antistatic ability of the fiber is improved, the damage to the hollow structure of the porel fiber in the production process is reduced, and the spinnability of the porel fiber is improved; the polyoxyethylene ether antistatic agent can form a conductive film on the surface of the porel fiber, improve the antistatic performance of the porel fiber, and further improve the spinnability of the fiber, and the carboxyl groups contained therein can also form hydrogen bonds with the hydrophilic groups contained in the porel fiber, improve the bonding force therebetween, and increase the stability of the antistatic treatment.

[0030] Preferably, the dyeing solution comprises 1.5-3% (omf) of cationic dyes, 2-4 g / L of a dyeing aid, and 0.5-2 g / L of a dispersing agent; the dyeing aid is a multifunctional alcohol-modified polyester.

[0031] Preferably, the cationic dyes comprise one or a combination of cationic yellow X-6G, cationic yellow X-8GL, cationic red X-GTL, and cationic blue X-GRRL.

[0032] Preferably, the dispersing agent comprises one or a combination of sodium lignosulfonate, naphthalene sulfonate formaldehyde condensate sodium salt, sulfosuccinate disodium salt, sulfosuccinate diethanolamine salt, and sodium p-toluenesulfonate.

[0033] By adopting the above technical scheme, the porel fiber is pretreated before dyeing, and is infiltrated by spraying the water solution of the antistatic agent, so that the moisture regain of the porel fiber is improved, the hollow capillary of the porel fiber is filled with sufficient moisture and reaches a saturated state after the pretreatment, the strength of the porel fiber is enhanced, the antistatic ability of the fiber is improved, the damage to the hollow structure of the porel fiber in the production process is reduced, and the spinnability of the porel fiber is improved; the polyoxyethylene ether antistatic agent can form a conductive film on the surface of the porel fiber, improve the antistatic performance of the porel fiber, and further improve the spinnability of the fiber, and the carboxyl groups contained therein can also form hydrogen bonds with the hydrophilic groups contained in the porel fiber, improve the bonding force therebetween, and increase the stability of the antistatic treatment.

[0034] And the present application also adds a multi-functional alcohol modified polyester in the dyeing process, on the one hand, the multi-functional alcohol modified polyester contains a polyester structure similar to the porel fiber, and the multi-functional alcohol modified polyester also contains hydrophilic hydroxyl groups, which can attract the hydrophilic groups on the surface of the porel fiber, promote the repeated dyeing of the dye on the porel fiber, improve the dyeing depth of the fiber, on the other hand, the multi-functional alcohol modified polyester also has certain dye carrier properties, which can help to improve the dyeing rate of the porel fiber. At the same time, the hydroxyl groups contained in the multi-functional alcohol modified polyester can form an interaction force with the carboxyl groups contained in the polyoxyethylene ether antistatic agent, and the formed network structure can consolidate the antistatic layer, so that the antistatic layer will not be shed due to external action in the subsequent processing process, and the discoloration phenomenon of the colored fiber in the subsequent use process is reduced.

[0035] Preferably, the raw materials of the multi-functional alcohol modified polyester include dimethyl terephthalate, ethylene glycol and pentaerythritol in a mass ratio of 1: (1.2-1.4): (0.5-0.7).

[0036] Preferably, the multi-functional alcohol modified polyester is prepared by the following method:

[0037] Dimethyl terephthalate, ethylene glycol and pentaerythritol are added in a solvent, the temperature is raised to 40-60℃, and after stirring and dissolving, catalyst B is added, the temperature is raised to 70-80℃ under nitrogen atmosphere, and after stirring for 24-30h, vacuum is extracted, the temperature is adjusted to 150-180℃, and the reaction is continued for 3-4h. Finally, the multi-functional alcohol modified polyester is obtained by vacuum distillation drying.

[0038] Preferably, the solvent is one of N-methyl pyrrolidone and N,N-dimethylformamide.

[0039] Preferably, the catalyst B includes one of titanium tetrabutoxide, zinc acetate and manganese acetate.

[0040] By using the above technical solution, the hydroxyl groups are introduced into the polyester by replacing part of the ethylene glycol with pentaerythritol, so that the synthesized polyester has water solubility, the average functionality of the obtained polyester can be controlled by mixing pentaerythritol with ethylene glycol, polymer molecular gelation is avoided, a large number of hydroxyl groups can be introduced into the molecular chain of the polyester, and the polyester contains a structure similar to the porel fiber, which is beneficial to improve the affinity. In the dyeing process, the dyeing depth of the dye can be significantly improved, the antistatic layer of the fiber can be consolidated, and the spinnability of the fiber can be enhanced.

[0041] In summary, the present application has the following beneficial effects:

[0042] 1. The cotton-like blended yarn of this application is obtained by blending porel fiber and cotton fiber, which can combine the excellent properties of cotton and polyester and meet people's daily needs for cotton fiber.

[0043] 2. The Porel fiber used in this application is pretreated with a polyoxyethylene ether antistatic agent before processing, which can form a continuous conductive film on the surface of the Porel fiber, improve the antistatic properties of the fabric, and thus improve the spinnability of the fiber. At the same time, the molecular chain of the polyoxyethylene ether antistatic agent contains carboxyl groups, which can form hydrogen bonds with the hydrophilic groups contained in the Porel fiber, thereby improving the bonding force between the antistatic layer and the fiber. The anion, namely acetate ion, present in the antistatic agent can combine with the cationic dye through electrostatic attraction, thereby improving the dyeing rate and dyeing depth of the Porel fiber, and further improving the dyeability of the Porel fiber.

[0044] 3. In the dyeing process, this application also adds a dyeing auxiliary agent, a polyfunctional alcohol-modified polyester, which has a polyester structure similar to that of Porel fiber. This is beneficial to improve the affinity between the two, promote the repeated dyeing of the dye on the Porel fiber, and improve the dyeing depth of the fiber. In addition, the hydroxyl groups contained therein can form an interaction force with the carboxyl groups contained in the polyoxyethylene ether antistatic agent. The resulting network structure can consolidate the antistatic layer. In subsequent processing, the antistatic layer will not fall off due to external forces, thus reducing the fading phenomenon of the dyed fiber in subsequent use. Detailed Implementation

[0045] Preparation Example 1-1: A polyoxyethylene ether-based antistatic agent was prepared according to the following method:

[0046] Add 10g of hydrogen peroxide and 0.3g of tert-butyl hydrogen peroxide to 100g of fatty alcohol polyoxyethylene ether AEO-9 (average degree of polymerization is 9), adjust the temperature to 35℃, stir and mix for 1h, then introduce oxygen, adjust the temperature to 80℃ under oxygen atmosphere, stir and react for 4h to obtain pretreated aliphatic polyoxyethylene ether.

[0047] 100g of pretreated aliphatic polyoxyethylene ether was heated to 100℃, and 5.5g of sodium hydroxide was added. The mixture was stirred and reacted for 2h under a nitrogen atmosphere. Then the temperature was adjusted to 60℃, and 26g of sodium chloroacetate was added. The mixture was heated to 85℃ under a nitrogen atmosphere and stirred and reacted for 5h. Finally, the polyoxyethylene ether antistatic agent was obtained by vacuum filtration and vacuum distillation.

[0048] Preparation Example 1-2 is a polyoxyethylene ether antistatic agent, which differs from Preparation Example 1-1 only in that the amount of hydrogen peroxide added is 8g.

[0049] Preparation Example 1-3, a polyoxyalkylene ether-based antistatic agent, differs from Preparation Example 1-1 only in that the amount of hydrogen peroxide added is 12 g.

[0050] Preparation Example 1-4, a polyoxyalkylene ether-based antistatic agent, differs from Preparation Example 1-1 only in that the amount of sodium hydroxide added is 5 g and the amount of sodium chloroacetate added is 25 g.

[0051] Preparation Example 1-5, a polyoxyalkylene ether-based antistatic agent, differs from Preparation Example 1-1 only in that the amount of sodium hydroxide added is 6 g and the amount of sodium chloroacetate added is 28 g.

[0052] Preparation Example 1-6, a polyoxyalkylene ether-based antistatic agent, differs from Preparation Example 1-1 only in that the amount of hydrogen peroxide added is 6 g.

[0053] Preparation Example 1-7, a polyoxyalkylene ether-based antistatic agent, differs from Preparation Example 1-1 only in that the amount of hydrogen peroxide added is 15 g.

[0054] Preparation Example 1-8, a polyoxyalkylene ether-based antistatic agent, is prepared as follows:

[0055] 100 g of aliphatic polyoxyalkylene ether AEO-9 (average degree of polymerization 9) is raised to a temperature of 100°C, and 5.5 g of sodium hydroxide is added while stirring under a nitrogen atmosphere for 2 h. The temperature is then adjusted to 60°C, 26 g of sodium chloroacetate is added, and the temperature is raised to 85°C while stirring under a nitrogen atmosphere for 5 h. The polyoxyalkylene ether-based antistatic agent is then obtained by filtration and distillation under reduced pressure.

[0056] Preparation Example 2-1, a multifunctional alcohol-modified polyester, is prepared as follows:

[0057] 10 g of dimethyl terephthalate, 13 g of ethylene glycol, and 6 g of pentaerythritol are added to 100 ml of N-methylpyrrolidone, and the temperature is raised to 50°C. After stirring and dissolving, 0.05 g of manganese acetate is added, and the temperature is raised to 80°C while stirring under a nitrogen atmosphere for 24 h. The temperature is then adjusted to 160°C, and the reaction is continued for 3 h. The multifunctional alcohol-modified polyester is then obtained by distillation and drying under reduced pressure.

[0058] Preparation Example 2-2, a multifunctional alcohol-modified polyester, differs from Preparation Example 2-1 only in that the amount of ethylene glycol added is 12 g and the amount of pentaerythritol added is 5 g.

[0059] Preparation Example 2-3, a multifunctional alcohol-modified polyester, differs from Preparation Example 2-1 only in that the amount of ethylene glycol added is 14 g and the amount of pentaerythritol added is 7 g.

[0060] Preparation Example 2-4, a multi-functionality alcohol-modified polyester, differs from Preparation Example 2-1 only in that the amount of pentaerythritol added is 3 g.

[0061] Preparation Example 2-5, a multi-functionality alcohol-modified polyester, differs from Preparation Example 2-1 only in that the amount of pentaerythritol added is 9 g.

[0062] Preparation Example 2-6, a multi-functionality alcohol-modified polyester, differs from Preparation Example 2-1 only in that no pentaerythritol is added. Example

[0063] Example 1, a polyester cotton-like blended yarn, includes the following process steps:

[0064] S1. The polyoxyalkylene ether antistatic agent prepared in Preparation Example 1-1 is added to water to prepare an antistatic agent aqueous solution with a mass fraction of 3%, which is uniformly sprayed on the surface of porel fibers (fineness of 1.66 dtex), and then tightly wrapped with a plastic film (PVC plastic film, thickness of 10-15 silk) for 24 h to obtain pretreated porel fibers; wherein the mass ratio of polyoxyalkylene ether antistatic agent to porel fibers is 0.03:1.

[0065] S2. The obtained pretreated porel fibers are added to a dyeing solution with a bath ratio of 1:20, the pH value of the solution is adjusted to 6, and the temperature is raised to 100°C at a heating rate of 2°C / min for 10 min, then raised to 130°C at a heating rate of 1°C / min, and kept for 30 min, then cooled to 80°C at a cooling rate of 4°C / min, and after washing, reduction cleaning is performed by a reduction cleaning solution, and finally water washing and drying are performed to obtain dyed porel fibers; wherein the temperature in the reduction cleaning process is adjusted to 80°C, kept for 25 min, and the bath ratio is 1:15;

[0066] The dyeing solution includes 2% (omf) of cationic blue X-GRRL, 3 g / L of the multi-functionality alcohol-modified polyester prepared in Preparation Example 2-1, and 1.5 g / L of sodium lignosulfonate;

[0067] The reduction cleaning solution includes 3 g / L of sodium hydroxide and 3 g / L of sodium hydrosulfite.

[0068] S3. The obtained dyed porel fibers are mixed with cotton fibers (fineness of 1.5-2 dtex) in a blending ratio of 80:20 by disc blending process to obtain mixed fibers;

[0069] S4. The mixed fibers are subjected to opening and cleaning treatment, wherein the rotating speed of the opening machine comb needle beater is 480; the cotton lap weight is 400 g / m, and the cotton lap roller speed is 12 r / min;

[0070] S5. Carding treatment was performed using a A186F carding machine, wherein the speed of the cylinder was reduced to 340 r / min, the mass of the sliver was 21 g / 5 m, and the speed of the licker-in was 750 r / min;

[0071] S6. Drawing: an antistatic rubber roller was used, the number of plies was 8, the mass was 17 g / 5 m, and the speed of the sliver was 200 m / min;

[0072] S7. Roving: the twist of the roving was 4.5 twists / 10 cm, the draft ratio in the back draft zone was 1.2, the roller gauge was 9 / 23 / 29 mm, and the speed of the front roller was 190 r / min;

[0073] S8. Spinning: the twist factor of the yarn was 370, and the speed of the front roller was 180 r / min;

[0074] S9. Winding: the yarn was wound into a conical bobbin on an automatic winder, and the winding speed was 500 m / min, thereby obtaining the polyester cotton-like blended yarn.

[0075] Example 2, a polyester cotton-like blended yarn, which is different from Example 1 only in that, in the step S1, the mass ratio of the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1 to the porel fiber was 0.02:1; and in the step S3, the blending ratio of the dyed porel fiber to the cotton fiber was 70:30.

[0076] Example 3, a polyester cotton-like blended yarn, which is different from Example 1 only in that, in the step S2, the dyeing solution included 1.5% (omf) of cationic blue X-GRRL, 2 g / L of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1, and 0.5 g / L of sodium lignosulfonate; and the reducing cleaning solution included 2 g / L of sodium hydroxide and 3 g / L of sodium dithionite.

[0077] Example 4, a polyester cotton-like blended yarn, which is different from Example 1 only in that, in the step S2, the dyeing solution included 3% (omf) of cationic blue X-GRRL, 4 g / L of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1, and 2 g / L of sodium lignosulfonate; and the reducing cleaning solution included 4 g / L of sodium hydroxide and 4 g / L of sodium dithionite.

[0078] Example 5, a polyester cotton-like blended yarn, which is different from Example 1 only in that, the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-2 was used to replace the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1.

[0079] Example 6, a polyester cotton-like blended yarn, which is different from Example 1 only in that, the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-3 was used to replace the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1.

[0080] Example 7: A polyester cotton blend yarn, which differs from Example 1 only in that the polyoxyalkylene antistatic agent prepared in Preparation Example 1-1 is replaced with an equal amount of the polyoxyalkylene antistatic agent prepared in Preparation Example 1-4.

[0081] Example 8: A polyester cotton blend yarn, which differs from Example 1 only in that the polyoxyalkylene antistatic agent prepared in Preparation Example 1-1 is replaced with an equal amount of the polyoxyalkylene antistatic agent prepared in Preparation Example 1-5.

[0082] Example 9: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is replaced with an equal amount of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-2.

[0083] Example 10: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is replaced with an equal amount of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-3.

[0084] Example 11: A polyester cotton blend yarn, which differs from Example 1 only in that the polyoxyalkylene antistatic agent prepared in Preparation Example 1-1 is replaced with an equal amount of the polyoxyalkylene antistatic agent prepared in Preparation Example 1-6.

[0085] Example 12: A polyester cotton blend yarn, which differs from Example 1 only in that the polyoxyalkylene antistatic agent prepared in Preparation Example 1-1 is replaced with an equal amount of the polyoxyalkylene antistatic agent prepared in Preparation Example 1-7.

[0086] Example 13: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is replaced with an equal amount of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-4.

[0087] Example 14: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is replaced with an equal amount of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-5.

[0088] Example 15: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is replaced with an equal amount of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-6.

[0089] Example 16: A polyester cotton blend yarn, which differs from Example 1 only in that the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is included in a dyeing solution at 1 g / L.

[0090] Example 17, a polyester cotton-like blended yarn, which is different from Example 1 only in that 5 g / L of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is included in the dyeing solution.

[0091] Example 18, a polyester cotton-like blended yarn, which is different from Example 1 only in that 3 g / L of the multifunctional alcohol-modified polyester prepared in Preparation Example 2-1 is not included in the dyeing solution.

[0092] Comparative Example 1, a polyester cotton-like blended yarn, which is different from Example 1 only in that the mass ratio of the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1 to the porel fiber is 0.01:1.

[0093] Comparative Example 2, a polyester cotton-like blended yarn, which is different from Example 1 only in that the mass ratio of the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1 to the porel fiber is 0.05:1.

[0094] Comparative Example 3, a polyester cotton-like blended yarn, which is different from Example 1 only in that the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-8 is used to replace the polyoxyethylene ether antistatic agent prepared in Preparation Example 1-1.

[0095] Comparative Example 4, a polyester cotton-like blended yarn, which is different from Example 1 only in that the S1 step is performed according to the following method: pure water is uniformly sprayed on the surface of the porel fiber (fineness is 1.66 dtex), and then a plastic film (PVC plastic film, thickness is 10-15 silk) is tightly wrapped for 24 h to obtain the pretreated porel fiber.

[0096] The polyester cotton-like blended yarns obtained in the examples and comparative examples are woven into fabrics according to the warp density of 28 roots / cm and the weft density of 24 shuttles / cm, and then the fabrics are cut into 20*20 cm sample pieces.

[0097] 1. K / S value: the surface color depth K / S value of each sample piece is tested by a color matching instrument.

[0098] 2. Color fastness test: the rubbing fastness of each sample piece is determined according to the relevant records in GB / T 3920-2008 “Textiles-Color fastness tests-Rubbing color fastness”.

[0099] 3. Breaking strength: the breaking strength of the blended yarns obtained in the examples and comparative examples is determined according to the relevant records in GB / T 3916-2013 “Textiles-Wound packages-Single yarn breaking strength and elongation (CRE method)”.

[0100] The above test results are shown in Table 1:

[0101] Table 1 Performance test results

[0102]

[0103] According to Table 1, combined with Example 1, Example 2-Example 10, it can be seen that the K / S value, rubbing fastness and breaking strength of Example 2-Example 10 have no obvious difference compared with Example 1, which indicates that the dyeing depth, color fastness, strength and spinnability of Example 2-Example 10 have no obvious difference with Example 1. The reason may be that the difference between Example 2-Example 10 and Example 1 is only that the ratio of the auxiliary in the blending process and the ratio of the raw materials in the preparation process of the auxiliary used are adjusted within the range, which indicates that adjusting the ratio within the required range has no obvious effect on the performance of the blended yarn obtained.

[0104] Combined with Example 1, Example 11, Example 12 and Comparative Example 3, it can be seen that the K / S value, rubbing fastness and breaking strength of Example 11, Example 12 and Comparative Example 3 have decreased compared with Example 1, and the decrease of Comparative Example 3 is more obvious, which indicates that the dyeing depth, color fastness, strength and spinnability of Example 11, Example 12 and Comparative Example 3 have decreased compared with Example 1. The reason may be that the difference between Example 11, Example 12 and Comparative Example 3 and Example 1 is only that the addition of polyoxyethylene ether antistatic agent to the raw materials in the preparation process is changed outside the range during the antistatic pretreatment of porel fiber, specifically, Example 11 reduces the addition amount of aliphatic polyoxyethylene ether and hydrogen peroxide in the treatment process, which leads to the decrease of carboxyl content on the molecular chain of aliphatic polyoxyethylene ether in the oxidation process, and the binding force between the fiber is also reduced accordingly, which leads to the instability of the antistatic layer in the processing process, and the spinnability of the fiber decreases, and at the same time, the combination between the multi-function alcohol modified polyester and the dyeing auxiliary in the dyeing process also decreases, and the fixation effect decreases, while the aliphatic polyoxyethylene ether in Comparative Example 3 is not subjected to oxidation treatment, and the decrease is more obvious. While Example 12 increases the addition amount of hydrogen peroxide, a large amount of carboxyl groups are generated, which will affect the dyeing rate of the dye and the fiber in the dyeing process, and then the dyeing depth decreases.

[0105] With Example 1, Example 13 to Example 15, it can be seen that the K / S value, rubbing fastness and breaking strength of Example 13 to Example 15 are decreased compared with Example 1, and the decrease of Example 15 is more obvious, which indicates that the dyeing depth, color fastness, strength and spinnability of Example 13 to Example 15 are all decreased compared with Example 1. The reason may be that the difference between Example 13 to Example 15 and Example 1 is only that the addition amount of the multifunctional alcohol modified polyester added in the dyeing process is adjusted in the preparation process. Specifically, the addition amount of pentaerythritol in Example 13 is reduced, which leads to the decrease of water solubility of the obtained water-soluble polyester and the number of hydroxyl polar groups contained in the molecular chain, and the attraction between the polyester and the fiber is reduced, which cannot promote the fiber to be dyed well and the dyeing depth is decreased. In Example 15, no dyeing agent is added, and the effect of improving the dyeing depth is greatly reduced. In Example 14, the addition amount of pentaerythritol is increased, and the polyester itself is crosslinked, and part of the gelation occurs, which is not conducive to dyeing processing.

[0106] With Example 1, Example 16 to Example 18, it can be seen that the K / S value, rubbing fastness and breaking strength of Example 16 to Example 18 are decreased compared with Example 1, and the decrease of Example 18 is more obvious, which indicates that the dyeing depth, color fastness, strength and spinnability of Example 16 to Example 18 are all decreased compared with Example 1. The reason may be that the difference between Example 16 to Example 18 and Example 1 is only that the addition amount of the multifunctional alcohol modified polyester added in the dyeing process is changed in Example 16 to Example 18. In Example 16, the addition amount of the multifunctional alcohol modified polyester is reduced, the dyeing effect of the dye is decreased, and the binding force between the multifunctional alcohol modified polyester and the antistatic agent is decreased, the crosslinked network structure of the antistatic layer is reduced, and the fixing effect is decreased. In Example 18, no dyeing agent is added, and the decrease is more obvious.

[0107] Compared with Example 1, Comparative Example 1, Comparative Example 2 and Comparative Example 4, it can be seen that the K / S value, rubbing fastness and breaking strength of Comparative Example 1, Comparative Example 2 and Comparative Example 4 are decreased, and the decrease of Comparative Example 4 is more obvious, which indicates that the dyeing depth, color fastness, strength and spinnability of Comparative Example 1, Comparative Example 2 and Comparative Example 4 are all decreased compared with Example 1. The reason may be that the addition amount of polyoxyethylene ether antistatic agent in the porel fiber antistatic pretreatment process of Comparative Example 1, Comparative Example 2 and Comparative Example 4 is changed, and the addition amount of antistatic agent in Comparative Example 1 is reduced, so the stability of the antistatic film on the surface of the porel fiber is decreased, which is easy to fall off in the processing process, reduces the spinnability of the fiber, and the strength of the obtained blended yarn is decreased. In Comparative Example 4, the porel fiber is not treated with antistatic agent, and the processability and spinnability of the porel fiber in the processing process are decreased obviously, and the strength of the obtained yarn is significantly decreased.

[0108] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A process for the production of polyester cotton-like blended yarns, characterized by, It comprises the following process steps: S1. A polyoxyethylene ether antistatic agent is added to water to prepare an antistatic agent aqueous solution with a mass fraction of 3-5%, which is uniformly sprayed on the surface of porel fibers, and then tightly wrapped with a plastic film for 24-30 h to obtain pretreated porel fibers, wherein the polyoxyethylene ether antistatic agent contains carboxyl groups on the molecular chain thereof; S2. The obtained pretreated porel fibers are added to a dyeing solution with a bath ratio of 1:(10-20), the pH value of the solution is adjusted to 5-6, the temperature is raised to 90-100℃ at a rate of 1-2℃ / min, and then the temperature is raised to 130-135℃ at a rate of 1-2℃ / min, and the temperature is maintained for 25-30 min, and then the temperature is lowered to 80-85℃ at a rate of 2-4℃ / min, and then the fibers are washed with water and subjected to reduction cleaning with a reduction cleaning solution, and finally the fibers are washed with water and dried to obtain dyed porel fibers; wherein the temperature is adjusted to 75-80℃ during the reduction cleaning process, the temperature is maintained for 20-30 min, and the bath ratio is 1:(15-20); the dyeing solution comprises 1.5-3% (omf) of a cationic dye, 2-4 g / L of a dyeing assistant, and 0.5-2 g / L of a dispersing agent; the dyeing assistant is a multi-function alcohol-modified polyester; S3. The obtained dyed porel fibers are mixed with cotton fibers according to a blending ratio by using a disc blending process to obtain mixed fibers; S4. The mixed fibers are subjected to opening and cleaning treatment, wherein the rotating speed of the opening and cleaning machine needle beater is 460-500, the cotton lap mass is 390-410 g / m, and the cotton lap roller speed is 11.5-12.5 r / min; S5. The fibers are subjected to carding treatment by using an A186F carding machine, wherein the speed of the cylinder is reduced to 330-370 r / min, the sliver mass is 19.5-22.5 g / 5 m, and the speed of the licker-in roller is 680-880 r / min; S6. Drawing: an antistatic rubber roller is used, the number of combined fibers is 7-8, the mass is 16-18 g / 5 m, and the sliver speed is 180-210 m / min; S7. Roving: the roving twist is 4.3-4.7 twists / 10 cm, the draft ratio in the back draft zone is 1.2-1.3, the roller gauge is 9 / 23 / 29 mm, and the front roller speed is 170-210 r / min; S8. Spinning: the twist factor of the spun yarn is 360-380, and the front roller speed is 160-200 r / min; S9. Coning: the fibers are coned into conical bobbins on an automatic coning machine, and the winding speed is 400-600 m / min, thereby obtaining polyester cotton-like blended yarns.

2. The process for producing polyester cotton-like blended yarn as claimed in claim 1 wherein, The raw materials of the multi-function alcohol-modified polyester include dimethyl terephthalate, ethylene glycol, and pentaerythritol at a mass ratio of 1:(1.2-1.4):(0.5-0.7).

3. The process for producing polyester cotton-like blended yarn as claimed in claim 2 wherein, The multi-function alcohol-modified polyester is prepared by the following method: In the solvent, dimethyl terephthalate, ethylene glycol and pentaerythritol are added, the temperature is raised to 40-60 DEG C, after stirring and dissolving, catalyst B is added, under nitrogen atmosphere, the temperature is raised to 70-80 DEG C, after stirring reaction for 24-30h, vacuum is extracted, the temperature is adjusted to 150-180 DEG C, the reaction is continuously carried out for 3-4h, finally, the multifunctional alcohol modified polyester is obtained by drying through reduced pressure distillation, and the catalyst B includes one of tetra-n-butyl titanate, zinc acetate and manganese acetate.

4. The process for producing polyester cotton-like blended yarn as claimed in claim 1 wherein, The reducing cleaning solution includes 2-4g / L of sodium hydroxide and 3-4g / L of sodium hydrosulfite.

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