CN113802232A

CN113802232A - Bamboo fiber and cotton fiber blended yarn and manufacturing process thereof

Info

Publication number: CN113802232A
Application number: CN202111244109.6A
Authority: CN
Inventors: 陈泽荣; 郭毅; 苟扬; 吴文丽
Original assignee: Sichuan Xiangheniao Fashion Co ltd
Current assignee: Sichuan Xiangheniao Fashion Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2021-12-17

Abstract

The application relates to the field of spinning, and particularly discloses a bamboo fiber and cotton fiber blended yarn and a manufacturing process thereof. The bamboo fiber and cotton fiber blended yarn is prepared from the following components in parts by mass: 15-20 parts of cotton fiber, 60-70 parts of bamboo fiber, 5-10 parts of polyester filament, 5-15 parts of viscose fiber and 5-10 parts of modified starch; the bamboo fiber is prepared by the following method: crushing bamboo blocks, cooking with alkali liquor, cleaning, soaking with oxidant solution, filtering, washing with water, drying, blending, stranding and twisting to obtain blended fiber; mixing polyvinyl alcohol with distilled water, heating to 80-90 deg.C, stirring, adding wheat protein and polyethylene glycol, and making into treatment solution; and (3) spinning the blended fiber and the treatment solution by a wet method, and performing after-treatment to prepare the bamboo fiber. The bamboo fiber and cotton fiber blended yarn has the advantages of good anti-pilling effect, high mechanical strength, odor adsorption and biodegradation.

Description

Bamboo fiber and cotton fiber blended yarn and manufacturing process thereof

Technical Field

The application relates to the technical field of spinning, in particular to a bamboo fiber and cotton fiber blended yarn and a manufacturing process thereof.

Background

The bamboo fiber is prepared by taking moso bamboo as a raw material and refining the moso bamboo for multiple times through water decomposition, has higher strength and better wear resistance, but is obviously inferior to a cotton product in softness, comfort degree, moisture absorption and air permeability, and the cotton fiber and the bamboo fiber are mixed and woven, so that the composite fiber has the advantages of environmental protection, antibiosis, soft hand feeling, good drapability and good moisture absorption, also has excellent yarn-dyed feeling and air permeability, and has wide market prospect.

In the prior art, a chinese patent application with application number CN201811475312.2 discloses a cotton-bamboo fiber blending process, which comprises the following steps:

preparing bamboo spinning: comprises a raw bamboo pretreatment process, a bamboo fiber processing process and a bamboo fiber post-treatment process; the bamboo fiber processing procedure comprises the procedures of soaking, stewing, pressing and pricking, neutralizing and washing, enzyme treatment, secondary stewing and secondary washing;

preparing cotton spinning: placing the cotton fiber yarns in a water steaming tank, steaming for 76 minutes at the water temperature of 78 ℃, and then pre-shaping for 15 hours in a natural state;

blending cotton and bamboo: and (3) carrying out mixed spinning on the cotton spinning and the bamboo spinning by adopting a water jet loom at the maximum tension value of the bamboo spinning.

In view of the above related technologies, the inventor believes that the blended yarn is not compact enough and fluffy due to short fiber length, rough fiber surface and poor cohesive force of the bamboo fiber, and after the blended yarn is woven into cloth, in the later friction process, if the end heads in the fiber are too much, the end heads are separated from single yarn to form fluffy yarns, and then are entangled to form hair bulbs, so that the appearance and the service life of the fabric are affected.

Disclosure of Invention

In order to prevent the bamboo fiber and the cotton fiber from pilling after being blended and rubbed and improve the appearance quality and the service life of the fabric, the application provides the bamboo fiber and cotton fiber blended yarn and the manufacturing process thereof.

In a first aspect, the application provides a bamboo fiber and cotton fiber blended yarn, which adopts the following technical scheme: a bamboo fiber and cotton fiber blended yarn is prepared from the following components in parts by mass: 15-20 parts of cotton fiber, 60-70 parts of bamboo fiber, 5-10 parts of polyester filament, 5-15 parts of viscose fiber and 5-10 parts of modified starch;

the bamboo fiber is prepared by the following method: crushing bamboo blocks into flocculent, cooking with alkali liquor, cleaning, soaking with oxidant solution with the mass percentage concentration of 10-15%, filtering, washing with water, drying, blending, and twisting to prepare blended fiber;

mixing 2-4 parts by weight of polyvinyl alcohol and 10-20 parts by weight of distilled water, heating to 80-90 ℃, uniformly stirring, adding 8-10 parts by weight of wheat protein and 3-5 parts by weight of polyethylene glycol, and uniformly mixing to prepare a treatment solution;

and (2) uniformly mixing 1-3 parts by weight of the blended fiber with 1-3 parts by weight of the treatment solution, carrying out wet spinning, and carrying out after-treatment to prepare the bamboo fiber.

By adopting the technical scheme, the bamboo fiber, the cotton fiber, the polyester filament, the viscose fiber and the modified starch are blended to be woven into the yarn, the polyester filament has high strength and is not easy to wear and break when being subjected to mechanical external force, the modified starch has high viscosity, and can be coated on the surfaces of the cotton fiber, the polyester filament, the bamboo fiber and the like during blending, so that the cohesive force of the bamboo fiber, the cotton fiber and the polyester filament is increased, the modified starch is gelatinized and dried to form a starch film which is coated on the surfaces of the bamboo fiber and the like, the hairiness quantity on the surface of the bamboo fiber is reduced, the bamboo fiber is not easy to pull out from the blended yarn when being subjected to high friction, and the pilling resistance is improved.

In addition, bamboo blocks are crushed and subjected to alkali treatment to remove surface impurities, the content of aldehyde groups of oxides of the bamboo blocks is increased, so that the reaction activity of the blended fiber is improved, primary hydroxyl groups at C6 positions on glucose units in molecules of the blended fiber are oxidized into active carboxyl groups after oxidation by an oxidant, the content of the aldehyde groups improved after alkali treatment is also oxidized into carboxyl groups, the purpose of protecting the yield of carbohydrates and cellulose is achieved, and the service life of the obtained bamboo fiber is prolonged. Then the blended fiber is mixed with wheat protein, polyethylene glycol and polyvinyl alcohol for spinning, the mass fraction of protein in the wheat protein is up to 72-85%, and the blended fiber has the advantages of good film forming property, safety, reliability, low price and the like, the wheat protein and the polyvinyl alcohol are combined by hydrogen bonds, the compatibility of the wheat protein and the polyvinyl alcohol is good, and a flexible, elastic, flat and smooth protein film can be formed on the blended fiber, so that the roughness of the surface of the bamboo fiber is reduced, the smoothness of the yarn is improved, and the wear resistance and the anti-pilling effect of the yarn are improved; in addition, under the action of polyethylene glycol, the adhesive force between the bamboo fiber and the protein membrane is increased, so that the protein membrane is not easy to fall off from the bamboo fiber, and the anti-pilling long-acting property of the bamboo fiber is improved; in addition, the cohesiveness of the polyethylene glycol can further improve the cohesive force of the bamboo fibers, the cotton fibers, the polyester filaments and the like, prevent the bamboo fibers from generating the pilling phenomenon due to insufficient cohesive force, and the compact wrapping structure inhibits the formation of the free ends of the bamboo fibers, so that the pilling rate is reduced.

Preferably, the post-finished bamboo fibers are subjected to the following post-treatment: treating for 1-3min under the microwave power of 200-300W, then placing the mixture into a steeping liquor with the pH value of 3-5, steeping for 3-4h at the temperature of 35-40 ℃, taking out and drying, wherein the steeping liquor is prepared by mixing glutaraldehyde, carbodiimide and distilled water according to the mass ratio of 1:0.2-0.3: 3-5.

By adopting the technical scheme, the bamboo fiber is treated by microwave and then placed in the impregnation formed by glutaraldehyde, carbodiimide and distilled water, and under the action of the microwave, the interaction of wheat protein molecules is facilitated to form a good network structure again, so that the mechanical property of the bamboo fiber is enhanced; in addition, after the microwave treatment, the disulfide bond content of the wheat protein coated on the surface of the bamboo fiber, covalent crosslinking except the disulfide bond and crystallinity are increased, the fiber shape of the wheat protein on the surface of the bamboo fiber is more obvious, and the surface is more compact and smooth. During dipping treatment, glutaraldehyde can be crosslinked with wheat protein, so that the number of granular substances on the surface is reduced, the distance between different protein molecules is reduced, the compactness of bamboo fibers is increased, the surfaces of the bamboo fibers are smoother, the mechanical property is improved, and the anti-pilling effect is increased; the carbodiimide can increase the load force of the wheat protein and the bamboo fiber, so that the wheat protein molecules form a stable and compact network structure on the surface of the bamboo fiber, the bamboo fiber has a smooth surface all the time, and the bamboo fiber is not easy to rub and ball.

Preferably, the blended fiber is pretreated by the following steps before being mixed with the treatment liquid:

putting 1-3 parts by weight of feather protein into 0.5-1% sodium carbonate aqueous solution by mass percent, boiling for 30-40min, washing with deionized water, drying, then uniformly mixing with 0.3-0.5 part by weight of coupling agent KH-550 and 3-5 parts by weight of distilled water to form feather protein mucus, dipping the blended fiber into the feather protein mucus according to a bath ratio of 1:10-20, dipping for 0.5-1h at 35-40 ℃, taking out and drying.

By adopting the technical scheme, the surface of the oxidized blended fiber has carboxyl, the carboxyl exists, so that the blended fiber has the capacity of carrying out amide crosslinking reaction with other organic matters or inorganic matters containing amino groups, the amino groups on the feather protein can be combined with the carboxyl on the surface of the blended fiber to form amide bonds, the mechanical property of the bamboo fiber is improved, the affinity of the blended fiber is increased when the blended fiber is mixed with a treatment liquid under the action of a coupling agent, the compatibility of the blended fiber and polyvinyl alcohol and the like is improved, and the cohesive force of the bamboo fiber is further improved.

Preferably, the preparation method of the viscose fiber comprises the following steps:

(1) washing sesame stalks and corn husks with water, crushing, placing in a sodium hydroxide solution with the mass percent of 20-25%, heating to 110 ℃, preserving heat for 10-20h, washing with water to obtain mixed powder, wherein the mass ratio of the corn husks to the sesame stalks to the sodium hydroxide solution is 1:0.4-0.7: 4-5;

(2) mixing 1-2 parts by weight of mixed powder with 2-2.5 parts by weight of 10-15% sodium hydroxide solution, adding 0.25-0.3 part by weight of epoxy chloropropane, stirring for 20-24h, filtering, washing to neutrality, adding 1-1.5 parts by weight of 30-35% triethylamine hydrochloride aqueous solution, stirring for 3-4h in 60-65 ℃ water bath, filtering, washing to neutrality, adding 0.3-0.8 part by weight of polylactic acid, 0.1-0.5 part by weight of coupling agent and 3-5 parts by weight of sodium hydroxide solution, heating to 90-100 ℃, preserving heat, stirring for 20-30min to obtain spinning solution, defoaming, spinning and preparing the viscose fiber.

By adopting the technical scheme, the corn husks and the sesame stalks are crop waste, and the sesame stalks and the corn husks are used for preparing the viscose, so that on one hand, a new raw material source is provided for the viscose, on the other hand, resources are fully utilized, and the environmental pollution is reduced. Firstly, after sesame stalks and corn husks are treated by alkali liquor, the softness of the corn husks and the softness of the sesame stalks are increased, mixed cellulose powder of the corn husks and the sesame stalks is obtained by drying, epoxy chloropropane is used for carrying out epoxidation modification on the mixed cellulose powder, then the mixed cellulose powder is mixed with triethylamine hydrochloride, etherified quaternary ammonium salt treatment is carried out on the mixed cellulose powder, the adsorption performance of the mixed cellulose powder to peculiar smell is improved, then the mixed cellulose powder is mixed with polylactic acid and a coupling agent, the compatibility of the mixed cellulose powder and the polylactic acid can be improved by the coupling agent, the polylactic acid has degradability and does not influence the biodegradability of viscose, and the toughness and the tensile property of the viscose can be improved by spinning the polylactic acid and the mixed cellulose.

Preferably, the modified starch is cyanoethyl starch.

By adopting the technical scheme, the cyanoethyl starch introduces cyanoethyl groups on the molecular chain of the starch, the polarity of the starch molecules is increased along with the increase of the substitution degree, the acting force between the starch molecules and water molecules is improved, the modified starch has good adhesion to cotton fibers, bamboo fibers and the like, the cohesive force of the cotton fibers and the bamboo fibers can be increased, the mechanical property of the blended yarn is improved, and the pilling is prevented.

Preferably, the alkali liquor cooking process comprises the following steps: placing the flocculent bamboo blocks into a solution prepared by mixing water and sodium hydroxide, and steaming at 100-200 deg.C for 1-2h with a ratio of water to sodium hydroxide of 3-4: 1.

By adopting the technical scheme, after the treatment of the sodium hydroxide, the content of aldehyde group of the oxide obtained by the flocculent bamboo blocks is increased, and the reaction activity is improved.

Preferably, the oxidizing agent is prepared by mixing nitric acid, phosphoric acid and sodium nitrite according to the mass ratio of 1-2:1: 0.06-0.14.

By adopting the technical scheme, the nitric acid, the phosphoric acid and the sodium nitrite can selectively oxidize the bamboo fiber, and the hydroxyl on the bamboo fiber is oxidized into active carboxyl, so that the degradation is avoided, the purpose of protecting the yield of carbohydrate and cellulose is achieved, and the mechanical strength of the bamboo fiber is increased.

Preferably, the after-finishing process specifically comprises the following steps: placing the prepared fiber in hot water of 55-60 deg.C, softening and stretching to 3-4 times of the length of the raw material, heating at 80-85 deg.C for 1-1.5h, and heating at 120-125 deg.C for 1-1.5h for shaping.

Through adopting above-mentioned technical scheme, in hot water, the fibre softening that will make is tensile, increases bamboo fiber's length, prevents to cause the end too much because of bamboo fiber length is short, through the balling-up after the friction.

In a second aspect, the application provides a manufacturing process of a bamboo fiber and cotton fiber blended yarn, which adopts the following technical scheme: a manufacturing process of a bamboo fiber and cotton fiber blended yarn comprises the following steps:

cotton carding is carried out on viscose fibers and cotton fibers after blowing respectively to form a mixed cotton carding sliver I;

pasting the modified starch, carding the polyester filament yarn and the bamboo fiber after blowing respectively, and spraying the pasted modified starch while mixing and carding to form a second mixed cotton carding sliver;

and drawing the mixed cotton carding strips I and the mixed cotton carding strips II, and performing roving and spinning to form the blended yarn.

By adopting the technical scheme, the modified starch is gelatinized and sprayed on polyester filament yarns and bamboo fibers during cotton carding, the modified starch is strong in adhesiveness, the cohesive force of the cotton fibers and the bamboo fibers can be increased, the ends of the bamboo fibers are prevented from being pulled out, and the bamboo fibers are prevented from pilling after being rubbed.

Preferably, the modified starch gelatinization method comprises the following steps: mixing modified starch with water, heating to 60-70 ℃, and stirring until the modified starch and the water are completely dissolved, wherein the mass ratio of the modified starch to the water is 1: 3-5.

Through adopting above-mentioned technical scheme, when modified starch gelatinization, with hydrogen bond bonding between the micrite bundle in the modified starch granule, modified starch intermolecular hydrogen bond fracture after the gelatinization, the hydrone gets into starch micrite bundle structure, the molecule degree of confusion increases, modified starch's viscosity increases, thereby increase dacron filament and bamboo fibrous adhesion, make the cladding of dacron filament on bamboo fiber, increase bamboo fibrous length, and dacron filament's powerful is higher, when receiving mechanical external force, difficult wearing and tearing fracture, even receive stronger frictional action and also be difficult for pulling out from the mixed yarn, thereby prevent that bamboo fiber end is more and play the ball.

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

1. because this application adopts polyester filament, viscose and modified starch to carry out the blending with cotton fiber and bamboo fibre and makes the yarn, because modified starch has the adhesion, can increase cotton fiber and bamboo fibre and polyester filament, viscose's cohesion, and modified starch forms smooth thick liquid membrane on each fibre surface, reduce the roughness of blended yarn, bamboo fibre is when the blending, the end is adhered on polyester filament or viscose by modified starch, then under modified starch's cladding, make bamboo fibre after the friction, the end is difficult for being pulled out, improve its anti pilling effect, the life of extension yarn.

2. In the application, alkali treatment is preferably adopted to treat the crushed bamboo blocks, so that the aldehyde group content is increased, the reaction activity is improved, then an oxidant is used to oxidize the crushed bamboo blocks, the cellulose yield is increased, finally the crushed bamboo blocks are spun with wheat protein and the like, the smoothness of the bamboo fibers can be increased by the wheat protein and the like, the cohesive force of the fibers is improved, and the anti-pilling effect of the fibers is improved.

3. The bamboo fiber is preferably subjected to post-treatment by microwave treatment and impregnation, and the smoothness of the surface of the bamboo fiber can be increased by microwave and impregnation, so that the mechanical strength of the bamboo fiber is improved, and the anti-pilling effect of the bamboo fiber is further improved.

4. In the application, feather protein and a coupling agent are preferably used to form mucus, the blended fiber is soaked, the feather protein can enter pores on the surface of the blended fiber and fill the pores on the surface of the blended fiber, so that the surface roughness of the blended fiber is reduced, amino groups on the surface of the feather protein can be crosslinked with carboxyl groups on the surface of the blended fiber to form amide bonds, and the feather protein forms fibers after spinning, so that the length of the bamboo fiber is increased, and the phenomenon that the end is pulled out to cause pilling when the end is rubbed due to the short length of the fibers is avoided.

5. The viscose fiber is prepared by preferably using the corn husks and the sesame stems, a new raw material source is provided for the viscose fiber, the environmental pollution is reduced, the prepared viscose fiber has the adsorbability, the deodorization performance and the biodegradability, the added value of the blended yarn is improved, and in addition, the mechanical strength of the viscose fiber is also improved due to the addition of the polylactic acid.

Detailed Description

Preparation examples 1 to 5 of bamboo fiber

The polyvinyl alcohol of preparation examples 1 to 5 was selected from Guangzhou Jinkai chemical Co.Ltd, model number BP-05; the polyethylene glycol is selected from the Federal fine chemical industry Co., Ltd in Guangdong, and the model is PEG-800; the wheat protein is selected from Shaanxi four-sea biotechnology limited company with the product number of SH-01270.

Preparation example 1: (1) crushing bamboo blocks into flocculent, putting the flocculent bamboo blocks into a solution prepared by mixing water and sodium hydroxide according to a mass ratio of 3:1, carrying out alkali liquor cooking at 100 ℃, washing after 2h of cooking, then soaking the flocculent bamboo blocks in an oxidant solution with a mass percentage concentration of 10%, filtering, washing with water, drying, twisting in a stranding way after blending to prepare a blended fiber, wherein the oxidant is prepared by mixing nitric acid, phosphoric acid and sodium nitrite according to a mass ratio of 1:1: 0.06;

(2) mixing 2kg of polyvinyl alcohol and 10kg of distilled water, heating to 80 ℃, uniformly stirring, adding 8kg of wheat protein and 3kg of polyethylene glycol, and uniformly mixing to prepare a treatment solution;

(3) mixing 1kg of blended fiber and 1kg of treatment liquid uniformly, washing with distilled water for 3 times after wet spinning, airing, putting the prepared fiber in 55 ℃ water, softening and stretching to 3 times of the original length, heating at 85 ℃ for 1h, heating at 120 ℃ for 1h for shaping, and preparing the bamboo fiber, wherein the coagulation bath of the wet spinning is prepared by mixing 200g/L sodium sulfate and 80g/L sulfuric acid.

Preparation example 2: (1) crushing bamboo blocks into flocculent, putting the flocculent bamboo blocks into a solution prepared by mixing water and sodium hydroxide according to a mass ratio of 4:1, carrying out alkali liquor cooking at 200 ℃, washing after cooking for 1h, then soaking the flocculent bamboo blocks in an oxidant solution with a mass percentage concentration of 15%, filtering, washing with water, drying, twisting in a stranding way after blending to prepare a blended fiber, wherein the oxidant is prepared by mixing nitric acid, phosphoric acid and sodium nitrite according to a mass ratio of 2:1: 0.14;

(2) mixing 4kg of polyvinyl alcohol and 20kg of distilled water, heating to 90 ℃, uniformly stirring, adding 10kg of wheat protein and 5kg of polyethylene glycol, and uniformly mixing to prepare a treatment solution;

(3) mixing 3kg of blended fiber and 3kg of treatment liquid uniformly, washing with distilled water for 4 times after wet spinning, airing, putting the prepared fiber in water at 60 ℃, softening and stretching to 4 times of the original length, heating at 80 ℃ for 1.5h, heating at 125 ℃ for 1.5h for shaping, and preparing the bamboo fiber, wherein the coagulation bath of the wet spinning is prepared by mixing 200g/L sodium sulfate and 80g/L sulfuric acid.

Preparation example 3: the difference from preparation example 1 is that no oxidizing agent was added in step (1).

Preparation example 4: the difference from preparation example 1 is that polyethylene glycol was not added in step (2).

Preparation example 5: the difference from preparation example 1 is that polyvinyl alcohol was not added in step (2).

Preparation examples 6 to 9 of viscose fibers

The polylactic acid of preparation examples 6 to 9 was selected from Suzhou Konghui plastics materials Co., Ltd, having a REVODE 190; the coupling agent is selected from Guangzhou Lvwei New Material science and technology Limited, with the product number of KH-550.

Preparation example 6: (1) washing sesame stalks and corn husks with water, crushing, putting into a sodium hydroxide solution with the mass percent of 20%, heating to 100 ℃, preserving heat for 10 hours, and washing with water to obtain mixed powder, wherein the mass ratio of the corn husks to the sesame stalks to the sodium hydroxide solution is 1:0.4: 4;

(2) mixing 1kg of mixed powder with 2kg of sodium hydroxide solution with the mass percent of 10%, adding 0.25kg of epoxy chloropropane, stirring for 20h, filtering, washing to be neutral, adding 1kg of triethylamine hydrochloride aqueous solution with the mass percent of 30%, stirring for 4h in a water bath at 60 ℃, filtering, washing with water to be neutral, adding 0.3kg of polylactic acid, 0.1kg of coupling agent and 3kg of sodium hydroxide solution, heating to 90 ℃, keeping the temperature and stirring for 30min to obtain spinning solution, defoaming, spinning to prepare viscose, wherein the coupling agent is KH-550, the defoaming temperature is 50 ℃, the diameter of a spinning plate is 0.08mm, the spraying speed of the spinning plate is 50m/min, a coagulating bath is prepared from 80g/L sulfuric acid, 200g/L sodium sulfate and 50g/L zinc sulfate, and the coagulating temperature is 50 ℃.

Preparation example 7: (1) washing sesame stalks and corn husks with water, crushing, putting into a sodium hydroxide solution with the mass percent of 25%, heating to 110 ℃, preserving heat for 20 hours, and washing with water to obtain mixed powder, wherein the mass ratio of the corn husks to the sesame stalks to the sodium hydroxide solution is 1:0.7: 5;

(2) mixing 2kg of mixed powder with 2.5kg of sodium hydroxide solution with the mass percent of 15%, adding 0.3kg of epoxy chloropropane, stirring for 24h, filtering, washing to be neutral, adding 1.5kg of triethylamine hydrochloride aqueous solution with the mass percent of 35%, stirring for 3h in 65 ℃ water bath, carrying out suction filtration, washing to be neutral, adding 0.8kg of polylactic acid, 0.5kg of coupling agent and 5kg of sodium hydroxide solution, heating to 100 ℃, keeping the temperature and stirring for 20min to obtain spinning solution, defoaming, spinning to prepare viscose, wherein the coupling agent is KH-550, the defoaming temperature is 50 ℃, the diameter of a spinning spinneret plate is 0.08mm, the spraying speed of the spinneret plate is 50m/min, a coagulating bath is prepared from 80g/L sulfuric acid, 200g/L sodium sulfate and 50g/L zinc sulfate, and the coagulating bath temperature is 50 ℃.

Preparation example 8: (1) washing sesame stalks and corn husks with water, crushing, putting into a sodium hydroxide solution with the mass percent of 25%, heating to 110 ℃, preserving heat for 20 hours, and washing with water to obtain mixed powder, wherein the mass ratio of the corn husks to the sesame stalks to the sodium hydroxide solution is 1:0.7: 5;

(2) heating 2kg of mixed powder, 0.8kg of polylactic acid, 0.5kg of coupling agent and 5kg of sodium hydroxide solution to 100 ℃, preserving heat and stirring for 20min to obtain spinning solution, defoaming and spinning to prepare viscose, wherein the coupling agent is KH-550, the defoaming temperature is 50 ℃, the spinning diameter is 0.08mm, the spinning speed of a spinneret plate is 50m/min, a coagulating bath is prepared from 80g/L sulfuric acid, 200g/L sodium sulfate and 50g/L zinc sulfate, and the coagulating bath temperature is 50 ℃.

Preparation example 9: the difference from preparation example 6 is that polylactic acid was not added.

Preparation of cyanoethyl starch example 10: preparing cassava native starch into starch emulsion with the mass fraction of 30%, adjusting the pH value to 8 by using sodium hydroxide solution with the mass fraction of 1%, dropwise adding acrylonitrile, stirring at 35 ℃ for 30min, adjusting the pH value to 6.5 by using dilute sulfuric acid, performing suction filtration, using filtrate for recovering unreacted acrylonitrile, washing a filter cake by using distilled water and absolute ethyl alcohol once, and performing natural air drying to obtain the cyanoethyl starch.

Examples

The polyester filament yarn is selected from textile Limited company with good faith and good, and the product number is 06; the viscose fiber is selected from Chongzhou Qing textile Co., Ltd, with the product number of 2501001; the cotton fiber is selected from Luolai chemical fiber, Limited liability company, with the product number of hcs; feather protein is selected from Wuhan Jingshidao industry Co., Ltd, with a product number as-1.

Example 1: the raw material consumption of the bamboo fiber and cotton fiber blended yarn is shown in table 1, the length of the cotton fiber is 64mm, the specification is 15D, and the specification of the polyester filament yarn is 75D/2; the specification of the viscose fiber is 250D/2, the modified starch is cyanoethyl starch, the cyanoethyl starch is prepared by preparation example 10, and the bamboo fiber is prepared by preparation example 1.

The manufacturing process of the bamboo fiber and cotton fiber blended yarn comprises the following steps:

s1, according to the raw material consumption in the table 1, cotton carding is carried out on viscose fibers and cotton fibers after blowing respectively to form a first mixed cotton carding sliver, and the rotating speed of a cylinder is 360r/min during cotton carding;

s2, pasting the modified starch, carding the polyester filament and the bamboo fiber after blowing respectively, and spraying the pasted modified starch while carding to form a second mixed carding bar, wherein the rotating speed of a cylinder is 300rpm during carding;

s3, drawing the first mixed cotton carding sliver and the second mixed cotton carding sliver, and forming blended yarns after roving and spinning, wherein the drafting multiple of the roving is 5.85 times, the ration is 10g/5m, the roving twist coefficient is 90.7, the twist coefficient during spinning is 460, and the ambient humidity is 70%.

TABLE 1 raw material usage of bamboo fiber and cotton fiber blended yarn in examples 1-4

Examples 2 to 4: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the raw materials were used in the amounts shown in table 1.

Example 5: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the bamboo fiber is selected from preparation example 2.

Example 6: a bamboo fiber and cotton fiber blended yarn, which is different from the example 1 in that the bamboo fiber prepared in the preparation example 1 is post-treated as follows: treating bamboo fiber for 3min under the condition that the microwave power is 300W, then placing the bamboo fiber in a steeping liquor, taking out the bamboo fiber, and drying the bamboo fiber at 50 ℃, wherein the preparation method of the steeping liquor comprises the following steps: mixing glutaraldehyde, carbodiimide and distilled water according to the mass ratio of 1:0.3:3, and then adjusting the pH value to 5.

Example 7: a bamboo fiber and cotton fiber blended yarn, which is different from the embodiment 6 in that glutaraldehyde is not added in the impregnation liquid.

Example 8: a bamboo fiber and cotton fiber blended yarn is different from the blended yarn in example 6 in that no carbodiimide is added to the impregnation liquid.

Example 9: a bamboo fiber and cotton fiber blended yarn, which is different from the example 6 in that the bamboo fiber is directly put into the impregnation liquid for impregnation without being subjected to microwave treatment.

Example 10: a blended yarn of bamboo fiber and cotton fiber, which is different from the embodiment 6 in that when preparing the bamboo fiber, the blended fiber is subjected to the following treatments before being mixed with a treatment liquid:

boiling 1kg of feather protein in 0.5% sodium carbonate aqueous solution for 30min, washing with deionized water, drying at 50 ℃, then uniformly mixing with 0.3kg of coupling agent KH-550 and 3kg of distilled water to form feather protein mucus, soaking the blended fiber in the feather protein mucus according to a bath ratio of 1:10, soaking for 0.5h at 35 ℃, taking out, and drying.

Example 11: a blended yarn of bamboo fiber and cotton fiber, which is different from example 10 in that feather protein is not used, and the blended fiber is placed in a dipping solution formed by uniformly mixing 0.3kg of coupling agent KH-550 and 3kg of distilled water.

Example 12: a blended yarn of bamboo fiber and cotton fiber, which is different from example 10 in that viscose fiber is selected from preparation example 6.

Example 13: a blended yarn of bamboo fiber and cotton fiber, which is different from example 10 in that viscose fiber is selected from preparation example 7.

Example 14: a blended yarn of bamboo fiber and cotton fiber, which is different from example 10 in that viscose fiber is selected from preparation example 8.

Example 15: a blended yarn of bamboo fiber and cotton fiber, which is different from example 10 in that viscose fiber is selected from preparation example 9.

Comparative example

Comparative example 1: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the bamboo fiber was prepared according to preparation example 3.

Comparative example 2: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the bamboo fiber was prepared according to preparation example 4.

Comparative example 3: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the bamboo fiber was prepared according to preparation example 5.

Comparative example 4: a blended yarn of bamboo fiber and cotton fiber, which is different from example 1 in that the bamboo fiber is selected from aorong rejuvenation ltd, shandong province.

Comparative example 5: a bamboo fiber and cotton fiber blended yarn, which is different from the example 1 in that modified starch is not added.

Comparative example 6: a production process of bamboo fiber blended yarn, (a) a cotton opening procedure: the selected bamboo fiber has the fineness of 1.65/dtex and the breaking strength of 2.45/cN-dtex^-1The moisture regain is 8.65%, the cotton fiber fineness is 1.65/dtex, and the breaking strength is 2.35/cN-dtex^-1The moisture regain is 7.20 percent, the fineness of the polyester fiber is 1.65/dtex, and the breaking strength is 2.35/cN.dtex^-1The moisture regain is 7.20 percent, and the fibers are mixed by a C-60 cotton opener according to the proportion of 50:25: 25;

(b) cotton carding process: carding the mixed fibers by adopting a DH-520 carding machine;

(c) drawing: adding the carded mixed bamboo fiber into pearl fiber, and putting the pearl fiber into a HFX-A2 drawing frame for drawing treatment to prepare fiber strips, wherein the content of alpha cellulose in the pearl fiber is 92%, and the content of pearl powder particles is 5%;

(d) roving: putting the fiber strips into a FHX-A3 roving machine to prepare roving with the static friction factor of 0.23 and the roving twist coefficient of 50;

(e) spinning: the roving is put into a ZP-20D spinning frame to be processed into spun yarn, the static friction factor is 0.23, and the twist coefficient of the spun yarn is 280;

(f) a yarn forming procedure: and winding and forming the spun yarn by adopting a yarn winding and forming machine.

Performance test

The blended yarn of bamboo fiber and cotton fiber prepared in each example and comparative example was tested for properties, the test items and methods were as follows, and the test results are reported in table 2.

1. Yarn tenacity and elongation at break: detecting according to FZ/T71002-2015 & ltcarded wool knitted wool';

2. hairiness index: detecting according to FZ/T01086-2000 projection counting method for measuring the hairiness of textile yarns;

3. anti-pilling rating: the blended yarn produced in each of the examples and comparative examples was used as warp and weft, woven into plain-weave fabrics, and then examined according to GB/T4802.1-2008 "determination of pilling Performance for textile part 1 circular trajectory method", wherein the anti-pilling grade was classified into 5 grades:

and 5, stage: no change is made;

4, level: slight fuzz and/or pilling;

and 3, level: moderate fuzz and/or pilling;

and 2, stage: apparent fuzzing and/or pilling;

level 1: severe fuzz and/or pilling;

4. deodorization ratio: determination of deodorizing Properties of textiles according to ISO/DIS17299-1-2014 part 1: general principles for detection.

TABLE 2 Performance testing of blended yarn of bamboo and cotton fibers

Examples 1 to 4 adopt cotton fibers and bamboo fibers of different raw material ratios, but the bamboo fibers prepared in preparation example 1 were used, and the hairiness index of the blended yarns prepared in examples 1 to 4 was 0.72 to 0.86, the pilling grade was 3, the yarn strength was 6.1 to 6.5 CV%, and the breaking strength of a single yarn was 12.14 to 12.34cN/tex, which indicates that the bamboo fiber and cotton fiber blended yarns prepared in examples 1 to 4 had smooth surfaces, a small number of hairiness, tight yarn cohesion, good pilling resistance, and after friction, were not easy to pilling, and had a good adsorption effect on odor.

Example 5 differs from example 1 in that the yarn strength, pilling resistance rating, etc. of the blended yarn made in example 5 are comparable to those of example 1, as shown by the data in table 2 using the bamboo fiber made in preparation example 2.

Example 6 differs from example 1 in that the bamboo fibers were post-treated with microwaves and impregnation, and the data in table 2 shows that the hairiness index of the blended yarn is reduced, the surface smoothness is increased, and the pilling rating is increased to level 5, indicating that the post-treatment increases the smoothness of the blended yarn, reduces its surface hairiness, and increases the mechanical strength of the blended yarn.

Example 7 differs from example 6 in that glutaraldehyde is not added during impregnation, and the test results for the blended yarn made in example 7 compared to example 6 show that glutaraldehyde can further improve the surface smoothness of the blended yarn, increase the anti-pilling effect, and increase the mechanical strength, with a decrease in single yarn breaking strength, a decrease in yarn tenacity, an increase in hairiness index, and a decrease in pilling rating to level 4.

Example 8 differs from example 6 in that no carbodiimide was added at the time of impregnation, and it is shown in table 2 that the hairiness index of the blended yarn is increased, the surface smoothness is decreased, and the pilling note is decreased to level 4, and the anti-pilling effect is deteriorated.

Example 9 is different from example 6 in that the bamboo fiber is not treated by microwave and is directly impregnated by the impregnation solution, the breaking strength of the single yarn of the blended yarn prepared in example 9 is reduced, the surface smoothness is reduced, and the anti-pilling effect is deteriorated, which shows that the microwave treatment can improve the smoothness of the surface of the bamboo fiber and increase the anti-pilling effect and the mechanical strength.

The difference between example 10 and example 6 is that when preparing bamboo fiber, after pretreating the blended fiber, the bamboo fiber is prepared, and table 2 shows that the single yarn breaking strength of the blended yarn is increased, the hairiness index is reduced, the surface smoothness is increased, and the anti-pilling effect is better.

Example 11 the surface smoothness of the blended yarn was reduced compared to example 10 when the blended yarn was pretreated without the addition of feather protein as shown by the data in table 2.

The difference between example 12 and example 13 and example 10 is that the viscose fibers prepared in preparation examples 6 and 7 were used, respectively, and the blended yarns prepared in examples 12 and 13 had a strong deodorizing effect with increased odor adsorbing performance.

With the viscose fibers of preparation 8 and preparation 9 of example 14 and example 15, respectively, the blended yarn prepared in example 14 has reduced odor adsorption and the blended yarn prepared in example 15 has reduced mechanical properties, compared to example 10.

Comparative example 1 using the bamboo fiber manufactured in preparation example 3, in which no oxidizing agent was used, the anti-pilling grade of the manufactured blended yarn was decreased, the breaking strength of the single yarn was decreased, and the yarn strength was decreased, indicating that the addition of the oxidizing agent was effective in improving the anti-pilling effect and mechanical strength of the blended yarn.

The difference between the comparative example 2 and the example 1 is that no polyethylene glycol is added when the bamboo fiber is prepared, and the data in the table 2 shows that the yarn strength and the single yarn breaking strength of the blended yarn are reduced, and the pilling grade is reduced to grade 2, but the hairiness index and the deodorization effect are not changed greatly, which indicates that the polyethylene glycol can increase the cohesive force of the bamboo fiber and the cotton fiber during blending, thereby preventing the pilling.

Comparative example 3 the bamboo fiber manufactured in preparation example 5 was used, which is different from example 1 in that polyvinyl alcohol was not added, the hairiness index of the blended yarn manufactured in comparative example 3 was increased, the surface thereof had more hairiness, and the breaking strength of the yarn was decreased, indicating that polyvinyl alcohol can increase the smoothness of the surface of the yarn, decrease the hairiness number of the surface thereof, and thus decrease the pilling performance thereof.

Comparative example 4 differs from example 1 in that comparative example 4 produced a blended yarn using commercially available bamboo fiber without any treatment having more surface hairiness, a pilling resistance rating of only 2, and a poor single yarn breaking strength.

Comparative example 5, in which no modified starch was added, the blended yarn made in comparative example 5 had a decreased pilling resistance rating, an increased hairiness index, and a decreased mechanical strength, as compared to example 1.

Comparative example 6 is a bamboo fiber blended yarn prepared by the prior art, and tests show that the anti-pilling effect is poor and the surface hairiness is more.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The bamboo fiber and cotton fiber blended yarn is characterized by being prepared from the following components in parts by mass: 15-20 parts of cotton fiber, 60-70 parts of bamboo fiber, 5-10 parts of polyester filament, 5-15 parts of viscose fiber and 5-10 parts of modified starch;

2. A blended yarn of bamboo fiber and cotton fiber according to claim 1, characterized in that: carrying out the following post-treatment on the post-treated bamboo fiber: treating for 1-3min under the microwave power of 200-300W, then placing the mixture into a steeping liquor with the pH value of 3-5, steeping for 3-4h at the temperature of 35-40 ℃, taking out and drying, wherein the steeping liquor is prepared by mixing glutaraldehyde, carbodiimide and distilled water according to the mass ratio of 1:0.2-0.3: 3-5.

3. The blended yarn of bamboo fiber and cotton fiber as claimed in claim 1, wherein the blended fiber is pretreated by:

4. The bamboo fiber and cotton fiber blended yarn according to claim 1, wherein the viscose fiber is prepared by the following method:

5. The bamboo fiber and cotton fiber blended yarn of claim 1, wherein the modified starch is cyanoethyl starch.

6. The bamboo fiber and cotton fiber blended yarn according to claim 1, wherein the alkali liquor cooking process comprises: placing the flocculent bamboo blocks into a solution prepared by mixing water and sodium hydroxide, and steaming at 100-200 deg.C for 1-2h with a ratio of water to sodium hydroxide of 3-4: 1.

7. The bamboo fiber and cotton fiber blended yarn according to claim 1, wherein the oxidizing agent is prepared by mixing nitric acid, phosphoric acid and sodium nitrite in a mass ratio of 1-2:1: 0.06-0.14.

8. The bamboo fiber and cotton fiber blended yarn according to claim 1, wherein the after-finishing process specifically comprises: placing the prepared fiber in hot water of 55-60 deg.C, softening and stretching to 3-4 times of the length of the raw material, heating at 80-85 deg.C for 1-1.5h, and heating at 120-125 deg.C for 1-1.5h for shaping.

9. A process for the manufacture of a bamboo fibre and cotton fibre blend yarn as claimed in any one of claims 1 to 8, comprising the steps of:

10. The process for manufacturing the bamboo fiber and cotton fiber blended yarn according to claim 9, wherein the modified starch gelatinization method comprises the following steps: mixing modified starch with water, heating to 60-70 ℃, and stirring until the modified starch and the water are completely dissolved, wherein the mass ratio of the modified starch to the water is 1: 3-5.