阅读说明：本技术 一种人棉纱的生产工艺 (Production process of rayon yarn ) 是由 刘沙沙 于 2019-08-26 设计创作，主要内容包括：本发明公开了一种人棉纱的生产工艺,依次包括如下步骤：1)原液准备、2)纺前准备、3)、纺丝成形、4)、后处理,其中,纺前准备包括对原料准备中制备的黏胶进行过滤、熟成、脱泡处理；后处理依次包括如下步骤：步骤A：拉伸：将纺丝成形中制得的初生丝在导丝盘上进行拉伸；步骤B：清洗：依次经过温水清洗、脱硫处理、酸洗和上油对拉伸后的初生丝进行清洗；步骤C：热定型：将清洗后的初生丝经过加热辊加热定性制得成丝；步骤D：卷绕：将经过热定型的成丝进行卷筒；步骤E：将卷筒后成丝的进行切断然后打包。本发明的工艺步骤操作简单,产品成品率高,提高了经济效益。(The invention discloses a production process of rayon yarn, which sequentially comprises the following steps: 1) stock solution preparation, 2) pre-spinning preparation, 3) spinning forming, 4) post-treatment, wherein the pre-spinning preparation comprises filtering, curing and defoaming treatment of viscose prepared in the raw material preparation; the post-treatment comprises the following steps in sequence: step A: stretching: drawing the primary yarn prepared in the spinning forming on a godet; and B: cleaning: cleaning the stretched nascent fiber by warm water cleaning, desulfurization treatment, acid cleaning and oiling in sequence; and C: heat setting: heating the cleaned nascent fiber through a heating roller to obtain finished fiber; step D: winding: winding the filaments subjected to heat setting into a drum; step E: and cutting the coiled wire into filaments and then packaging. The method has the advantages of simple operation of process steps, high product yield and improvement of economic benefits.)

1. A production process of rayon yarn is characterized in that: the production process sequentially comprises the following steps: 1) stock solution preparation, 2) preparation before spinning, 3) spinning forming, 4) and post-treatment.

2. The rayon yarn production process of claim 1, wherein said raw material preparation is: natural cellulose is adopted as a raw material, pure alpha-cellulose is extracted from the cellulose raw material, sodium hydroxide and carbon disulfide are used for processing to obtain orange-yellow cellulose sodium xanthate, and the orange-yellow cellulose sodium xanthate is dissolved in a dilute sodium hydroxide solution to prepare the viscose.

3. The process for producing rayon yarn according to claim 2, wherein the pre-spinning preparation is: filtering, aging and defoaming the mucilage prepared in the raw material preparation, wherein the aging treatment is to keep the temperature of the mucilage at 40-50 ℃ for 20-25 h.

4. The rayon yarn production process as claimed in claim 3, wherein the spinning formation is to put filtered, cured and defoamed viscose into a spinning box and stir the viscose, then control the flow of the viscose by a metering pump, filter the viscose by a filter, then spray the viscose through a gooseneck tube arranged in a box filled with a coagulating liquid and a spinneret orifice to form primary yarns.

5. The production process of the rayon yarn as claimed in claim 4, wherein the coagulating liquid is an aqueous solution of sulfuric acid, sodium sulfate, zinc sulfate and dibutyl phthalate, wherein the sulfuric acid content is 6-8%, the sodium sulfate content is 3-7%, the zinc sulfate content is 2-4%, and the dibutyl phthalate content is 5-7 ‰.

6. The production process of rayon yarn according to claim 4, characterized in that said post-treatment comprises the following steps in sequence: step A: stretching: drawing the primary yarn prepared in the spinning forming on a godet; and B: cleaning: cleaning the stretched nascent fiber by warm water cleaning, desulfurization treatment, acid cleaning and oiling in sequence; and C: heat setting: heating the cleaned nascent fiber through a heating roller to obtain finished fiber; step D: winding: winding the filaments subjected to heat setting into a drum; step E: and cutting the coiled wire into filaments and then packaging.

7. The production process of rayon yarn according to claim 6, wherein the temperature of warm water washing in step B is 60-70 ℃.

8. The production process of rayon yarn according to claim 6, wherein the deacidification treatment in step B is carried out by subjecting the as-spun yarn after warm water washing to an aqueous solution with a sodium hydroxide content of 10-15%.

9. The production process of rayon yarn according to claim 6, wherein the acid washing in step B is an aqueous solution of 10-13% hydrochloric acid content of the desulfurized as-spun yarn.

10. The process for producing rayon yarn according to claim 6, wherein the temperature of heat setting in step C is 80-85 ℃.

Technical Field

The invention relates to a production process of rayon yarn, belonging to the technical field of spinning.

Background

The cotton yarn is mainly a substitute of cotton, it is a fiber extracted from the knitted plant, it is processed and made by adopting the special craft, the gloss is good, the hand feeling is exquisite, the cloth use made is natural and undoubted, the cotton yarn of the people is used in various clothes and ornamental processing, have played the vital role in promoting the development of the clothes trade of our country; the rayon yarn is usually prepared by a wet-method filamentation mode at present, but the production process steps of the existing rayon yarn are more complicated, and the yield is lower.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a production process of rayon yarn, which has the advantages of simple operation of process steps, high finished product rate and improved economic benefit.

The technical scheme adopted by the invention is as follows: a production process of rayon yarn sequentially comprises the following steps: 1) stock solution preparation, 2) preparation before spinning, 3) spinning forming, 4) and post-treatment.

Preferably, the raw materials are prepared as follows: natural cellulose is adopted as a raw material, pure alpha-cellulose is extracted from the cellulose raw material, sodium hydroxide and carbon disulfide are used for processing to obtain orange-yellow cellulose sodium xanthate, and the orange-yellow cellulose sodium xanthate is dissolved in a dilute sodium hydroxide solution to prepare the viscose.

Further preferably, the preparation before spinning is as follows: filtering, aging and defoaming the mucilage prepared in the raw material preparation, wherein the aging treatment is to keep the temperature of the mucilage at 40-50 ℃ for 20-25 h.

Preferably, the spinning forming is to put the filtered, cured and defoamed viscose into a spinning box and stir the viscose, then control the flow of the viscose through a metering pump, filter the viscose through a filter, and spray the viscose through a gooseneck tube arranged in a box filled with a solidification liquid to a spinneret orifice to form the nascent fiber.

Further preferably, the coagulating liquid is an aqueous solution of sulfuric acid, sodium sulfate, zinc sulfate and dibutyl phthalate, wherein the sulfuric acid content is 6-8%, the sodium sulfate content is 3-7%, the zinc sulfate content is 2-4%, and the dibutyl phthalate content is 5-7%.

Further preferably, the post-treatment comprises the following steps in sequence: step A: stretching: drawing the primary yarn prepared in the spinning forming on a godet; and B: cleaning: cleaning the stretched nascent fiber by warm water cleaning, desulfurization treatment, acid cleaning and oiling in sequence; and C: heat setting: heating the cleaned nascent fiber through a heating roller to obtain finished fiber; step D: winding: winding the filaments subjected to heat setting into a drum; step E: and cutting the coiled wire into filaments and then packaging.

Further preferably, the temperature of the warm water washing in the step B is 60-70 ℃.

Further preferably, the deacidification treatment in the step B is to subject the freshly formed filaments after being washed with warm water to an aqueous solution with the sodium hydroxide content of 10-15%.

Further preferably, the acid washing in the step B is to subject the desulfurized primary yarn to an aqueous solution with the hydrochloric acid content of 10-13%.

Further preferably, the temperature of the heat setting in the step C is 80-85 ℃.

The invention has the beneficial effects that:

the degree of esterification of the cellulose xanthate is reduced by the ripening treatment, and the utilization rate of the cellulose is improved; the coagulating liquid is aqueous solution of sulfuric acid, sodium sulfate, zinc sulfate and dibutyl phthalate, wherein the sulfuric acid content is 6-8%, the sodium sulfate content is 3-7%, the zinc sulfate content is 2-4%, and the dibutyl phthalate content is 5-7%, so that the gel filament forming rate is improved.

Detailed Description

The present invention will be described in detail with reference to the following examples.