阅读说明：本技术 一种免染色纱线的加工方法 (Processing method of dyeing-free yarn ) 是由 谭炳成 于 2018-06-05 设计创作，主要内容包括：本发明涉及纺织领域中纱线的加工方法,公开了一种免染色纱线的加工方法,具体步骤如下：调配溶剂：预先配置好的由强碱剂、柔软剂、破坏剂、氯化钠和水混合得到的浸轧溶解液,并预冷到5℃～-15℃；浸入纱线；浸轧处理；纱线清洗；烘干成品。本发明提供的一种免染色纱线的加工方法,步骤合理,采用破坏剂去除纱线上的毛刺,使得纱线表面光滑,即纱线无需上浆就能具有柔软的手感,从而不仅根本上解决了浆料污染和纱线残留浆料的问题,而且还大大简化了纱线的加工工艺,同时,破坏剂采用尿素、硫脲等容易中和、并对人体无害的物质,使得纱线只需要经过简单的浸泡清洗,就能够去除化学试剂,从而使得纱线的加工过程安全环保。(The invention relates to a processing method of yarns in the field of textiles, and discloses a processing method of dyeing-free yarns, which comprises the following specific steps: preparing a solvent: pre-preparing a padding solution obtained by mixing a strong alkali agent, a softening agent, a breaking agent, sodium chloride and water, and pre-cooling to 5-15 ℃; immersing the yarn; padding treatment; cleaning yarns; and (5) drying the finished product. The processing method of the dyeing-free yarn provided by the invention has reasonable steps, and adopts the damaging agent to remove burrs on the yarn, so that the surface of the yarn is smooth, namely the yarn can have soft hand feeling without sizing, thereby not only fundamentally solving the problems of slurry pollution and residual slurry of the yarn, but also greatly simplifying the processing technology of the yarn.)

1. A processing method of dyeing-free yarn is characterized in that: the method comprises the following specific steps:

A) preparing a solvent: pre-preparing a padding solution obtained by mixing an alkali-strengthening agent, a softening agent, a destructive agent, sodium chloride and water, and pre-cooling to 5-15 ℃, wherein the content of the alkali-strengthening agent is 0.5-20.0 wt%, and the content of the destructive agent is 0.5-20.0 wt%;

B) immersing the yarns: the yarn is immersed into the padding solution in an open width mode, the immersion speed is kept at 20 m/min, the immersion rate of the yarn is controlled to be more than 80%, and the whole immersion environment is 5-80 ℃;

C) padding treatment: padding the immersed yarn for 10 s-15 min;

D) yarn cleaning: immersing the padded yarns into cleaning fluid for 15-20 min, wherein the whole immersion environment is 10-100 ℃; e) Drying: drawing and drying the cleaned yarn in an open width state, wherein the drying temperature is 100-140 ℃, and the tentering and drying time is 2-3 min;

F) and (3) finished product: curling the dried yarn to obtain a finished product;

wherein the mass concentration of the softening agent in the padding dissolving liquid is 0.2-1 g/L, the mass concentration of the destructive agent is 0.2-1 g/L, the mass concentration of the sodium chloride is 20-40 g/L, and the mass ratio of the softening agent to the destructive agent is 1: 1.

2. the method of claim 1, wherein the method comprises the steps of: the softening agent is a cationic softening agent or a mixture of cationic and nonionic softening agents.

3. A method of processing dye-free yarn as claimed in claim 1 or 2, wherein: in the step A), the strong alkali agent is one or a mixture of sodium hydroxide, lithium hydroxide and potassium hydroxide.

4. A method of processing dye-free yarn as claimed in claim 3, wherein: in the step A), the destroying agent is one or the mixture of urea and thiourea.

5. A method of processing dye-free yarn as claimed in claim 3, wherein: in the step B), the yarn is a cellulose-containing fiber yarn, and the cellulose is one of cotton, hemp and viscose.

6. A method of processing dye-free yarn as claimed in claim 3, wherein: the cleaning solution in the step B) is one of water, alcohol and acetone.

7. A method of processing dye-free yarn as claimed in any one of claims 1 or 2, 4 to 6, wherein: the drying temperature in the step E) is 120-130 ℃.

Technical Field

The invention relates to a processing method of yarns in the field of textiles, in particular to a processing method of dyeing-free yarns.

Background

According to 2010 statistics, the discharge amount of Chemical Oxygen Demand (COD) in the textile industry is the fourth in 39 industries in China, the total amount is 30.5 ten thousand tons, and about 25% of the discharge amount comes from desizing wastewater. The main reason for the high COD of the desizing wastewater is that a large amount of polyvinyl alcohol (PVA) slurry with high COD and low biodegradability is contained in the desizing wastewater. PVA slurry is difficult to desize and poor in biodegradability, and is accumulated in a large amount after being discharged into a water body, so that the respiratory activity of aquatic organisms is inhibited and destroyed, heavy metals in sediments are released and migrated, and further more serious water pollution is caused.

In recent years, China advocates that PVA is replaced by modified starch/acrylic acid compound sizing agent, which has relatively high feasibility, but the acrylic acid sizing agent has strong moisture absorption and re-viscosity and higher price, and can only be used as auxiliary sizing agent. The modified starch slurry has the defects of slurry aging gel, hard and brittle slurry film and the like, is difficult to slurry pure cotton with high grade, high density and high tightness and special polyester cotton products, the modification treatment also improves the cost of the slurry, reduces the market competitiveness of the slurry, and the modified starch is still questionable as green and environment-friendly slurry because substances which are harmful to human bodies and the environment, such as formaldehyde, heavy metal salt and the like, are used in the modification process. In order to produce modified starch, more than 20 million tons of starch are consumed in China every year. This is clearly a burden for china, a country that needs to thrive 21% of the world's population with 9% of the arable land. How to find a practical and feasible road for realizing environment-friendly sizing according to the national conditions of China is still a major problem to be solved by the textile industry at present. In order to solve the above problems, it is necessary to develop a PVA-free, low-consumption and environment-friendly sizing technology.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a processing method of dyeing-free yarns, which aims to solve the technical problems of serious pollution and complicated sizing procedure in yarn processing in the prior art.

In order to achieve the purpose, the invention provides a processing method of dyeing-free yarns, which comprises the following specific steps:

A) preparing a solvent: pre-preparing a padding dissolving solution obtained by mixing an alkali-strengthening agent, a softening agent, a breaking agent, sodium chloride and water, and pre-cooling to 5-15 ℃, wherein the content of the alkali-strengthening agent is 0.5-20.0 wt%, and the content of the breaking agent is 0.5-20.0 wt%;

B) immersing the yarns: the yarn is immersed into the padding solution in an open width mode, the immersion speed is kept at 20 m/min, the immersion rate of the yarn is controlled to be more than 80%, and the whole immersion environment is 5-80 ℃; C) padding treatment: padding the immersed yarn for 10 s-15 min;

D) yarn cleaning: immersing the padded yarns into cleaning fluid for 15-20 min, wherein the whole immersion environment is 10-100 ℃;

E) drying: drawing and drying the cleaned yarn in an open width state, wherein the drying temperature is 100-140 ℃, and the tentering and drying time is 2-3 min;

F) and (3) finished product: and curling the dried yarn to obtain a finished product.

Preferably, the softening agent is a cationic softening agent or a mixture of cationic and nonionic softening agents.

Preferably, the mass concentration of the softening agent in the padding dissolving liquid is 0.2 g/L-1 g/L, the mass concentration of the breaking agent is 0.2 g/L-1 g/L, the mass concentration of the sodium chloride is 20 g/L-40 g/L, and the mass ratio of the softening agent to the breaking agent is 1: 1.

preferably, in the step A), the strong alkali agent is one or a mixture of sodium hydroxide, lithium hydroxide and potassium hydroxide.

Preferably, the destroying agent in the step A) is one or two of urea and thiourea.

Preferably, the yarn in step B) is a cellulose-containing fiber yarn, and the cellulose is one of cotton, hemp and viscose.

Preferably, the cleaning liquid in step B) is one of water, alcohol and acetone.

Preferably, the drying temperature in step E) is 120 to 130 ℃.

The invention has the beneficial effects that: compared with the prior art, the processing method of the dyeing-free yarn provided by the invention has reasonable steps, adopts the destructive agent to remove burrs on the yarn, and enables the surface of the yarn to be smooth, namely the yarn can have soft hand feeling without sizing, thereby not only fundamentally solving the problems of slurry pollution and residual slurry of the yarn, but also greatly simplifying the processing technology of the yarn, and simultaneously, the destructive agent adopts substances which are easy to neutralize and are harmless to human bodies, such as urea, thiourea, and the like, so that the chemical agent can be removed only by simple soaking and cleaning, and the processing process of the yarn is safe and environment-friendly.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a method for processing a dyeing-free yarn, which includes the following specific steps:

A) preparing a solvent: pre-preparing a padding solution obtained by mixing an alkali-strengthening agent, a softening agent, a breaking agent, sodium chloride and water, and pre-cooling to 5-15 ℃, wherein the content of the alkali-strengthening agent is 0.5-20.0 wt%, and the content of the breaking agent is 0.5-20.0 wt%.

In the embodiment of the invention, the damaging agent is adopted to replace the sizing process, so that the complicated sizing and desizing processes are avoided, the technical problem that the sizing agent is remained on the yarn to influence the quality of the yarn is fundamentally solved, and the using effect of the yarn is greatly improved.

Wherein, in order to avoid the residue of the damaging agent on the yarn, the damaging agent is one or the mixture of urea and thiourea in the step A).

Specifically, the softener is a cationic softener or a mixture of cationic and nonionic softeners.

Specifically, the mass concentration of the softening agent in the padding dissolving solution is 0.2-1 g/L, the mass concentration of the destructive agent is 0.2-1 g/L, the mass concentration of sodium chloride is 20-40 g/L, and the mass ratio of the softening agent to the destructive agent is 1: 1.

B) immersing the yarns: the yarn is immersed into the padding solution in an open width mode, the immersion speed is kept at 20 m/min, the immersion rate of the yarn is controlled to be more than 80%, and the whole immersion environment is 5-80 ℃. The yarn is a cellulose-containing fiber yarn, the cellulose is one of cotton, hemp and viscose, and the cleaning solution is one of water, alcohol and acetone.

C) Padding treatment: and carrying out padding treatment on the immersed yarn for 10 s-15 min.

D) Yarn cleaning: and immersing the padded yarns into cleaning fluid for 15-20 min, wherein the whole immersion environment is 10-100 ℃.

E) Drying: and (3) drawing and drying the cleaned yarns in an open width state, wherein the drying temperature is 100-140 ℃, and the drawing and drying time is 2-3 min. In this case, the drying temperature is preferably 120 to 130 ℃.

F) And (3) finished product: and curling the dried yarn to obtain a finished product.

In order to make burrs on the yarn more easily fall off, the strong alkali agent in the step A) is one or a mixture of sodium hydroxide, lithium hydroxide and potassium hydroxide.

The embodiment of the invention can be applied to cellulose fibers such as cotton, hemp, viscose and the like and blended yarns of the cellulose fibers and other types of fibers, the used padding solution and the cleaning solution can be recovered, and substances dissolved from the fibers can be removed by the used cleaning agent solution in the temperature rising process, so that the repeated use of the padding solution is realized, and the safety and environmental protection of yarn processing are realized; in addition, the raw materials selected in the embodiment of the invention have low price and low cost, and the whole process only needs simple stretching padding and curling recovery, so that the operation of processing equipment is simpler, and the processing efficiency of the yarn is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.