CN114369953A - Desizing-free linen yarn sizing treatment method and desizing-free linen fabric - Google Patents

Abstract

The invention belongs to the technical field of printing and dyeing, and discloses a sizing treatment method for non-desizing flax yarn. The present invention adopts the liquid wax sizing process, the raw materials are easy to obtain, easy to store, non-toxic and non-corrosive, and has good chemical stability. The slurry does not need to be boiled, the desizing process is reduced, the sizing process is greatly optimized, a large amount of sewage discharge and the use of steam and hydropower are reduced, and the effect of energy saving and emission reduction can be achieved. The sizing at room temperature is adopted, and the subsequent embryonic cloth does not need to be desizing, so the power resources and costs are greatly reduced. The invention also provides a desizing-free flax fabric, the yarn hairiness, bundling, breaking strength and abrasion resistance of the sizing are obviously improved, which can satisfy the subsequent high-speed weaving process of flax and realize desizing-free, saving a lot of money. Electric power and water resources also avoid the generation of desizing wastewater, which is in line with the concept of green and environmentally friendly development of my country's textile industry.

Description

Desizing-free flax yarn sizing treatment method and desizing-free flax fabric

technical field

The invention relates to the technical field of printing and dyeing, in particular to a sizing treatment method for non-desizing flax yarn and a non-desizing flax fabric.

Background technique

With the development of the country, consumers are more and more interested in natural products. At the same time, they put forward higher requirements for natural products. Flax fiber belongs to natural cellulose fiber, which has the characteristics of roughness and stiffness, cool and breathable, natural antibacterial, antistatic, Anti-ultraviolet and other advantages, deeply loved by consumers. Because flax fiber belongs to bundle fiber, its length and fineness vary greatly, resulting in poor yarn evenness. The flax raw yarn has many hairiness on the surface and poor fiber bundle, which is difficult to fit, and is prone to breakage during pre-weaving preparation and weaving process. At the same time, flax fiber has larger initial modulus and breaking strength, correspondingly, flax yarn has larger breaking strength and lower elongation at break. How to improve the elongation at break of linen yarn under the condition of ensuring the strength is the key to improving the weaving quality and weaving efficiency of linen fabrics. Therefore, how to improve the production efficiency and product quality of linen fabrics is a major problem that needs to be solved urgently in the linen spinning industry.

At present, wet-laid linen yarn and low-speed weaving of linen fabrics are mainly used, and the weaving efficiency is low, which severely limits its production, processing and application range. In order to realize the weavability of the flax yarn on the high-speed loom, the raw flax yarn is subjected to sizing treatment. However, there are still many problems in the practical application of this technology. For example, the commonly used sizing agent in the factory is Polyacrylic acid (PVA) and modified starch, traditional linen grey fabrics must be treated with alkali or enzyme desizing after weaving, resulting in a large amount of desizing wastewater. Among them, PVA and other chemicals are almost non-degradable, causing great damage to the environment. pollution. At the same time, wastewater treatment has the disadvantages of high cost and wastewater discharge pressure.

With the increasingly strict monitoring of environmental protection production in the textile industry, energy saving and emission reduction have become the focus of the long-term sustainable development of the textile industry. At the same time, the entire process of traditional flax yarn sizing, weaving and desizing is complicated, and the process of desizing consumes water and electricity resources. It is serious, and the sewage discharge is large, and the environmental pressure is increasing day by day. Therefore, the development of a flax yarn sizing treatment process that does not require desizing treatment and simplifies the sizing weaving process has become an urgent need in the art.

SUMMARY OF THE INVENTION

In view of this, the present invention adopts a special sizing treatment process without desizing treatment, greatly simplifies the sizing and weaving process flow, and solves the traditional flax yarn sizing, weaving and desizing process in the prior art. The process of hydropower resource consumption is serious, and the sewage discharge is large, and the environmental pressure is increasing day by day.

In order to achieve the above object, the present invention adopts the following technical solutions:

The invention provides a sizing treatment method for non-desizing flax yarn, comprising the following steps:

(1) sizing: the flax yarn is subjected to sizing treatment on the sizing machine to obtain the sizing yarn;

(2) weaving: the yarn after sizing is weaved to obtain fabric;

(3) Post-finishing: Add resin finishing agent to the fabric for anti-wrinkle finishing, and then add softener for softening finishing, that is, to avoid desizing linen fabric.

Preferably, in the step (1), the sizing treatment is carried out by means of two dips and two rollings.

Preferably, in the step (1), the slurry includes polyvinyl alcohol, paraffin, and styrene-butadiene rubber, and the volume concentration of the slurry is 15-30%.

Preferably, the mass ratio of the polyvinyl alcohol, paraffin wax, and styrene-butadiene rubber is 2-3:10-15:3.

Preferably, in the step (1), the speed of the sizing machine is 60-70 m/min, and the sizing treatment temperature is 60-80°C.

Preferably, in the step (3), the resin finishing agent is one or more of urea-formaldehyde resin, melamine-formaldehyde resin, thiourea resin, and epoxy resin, and the amount of the resin finishing agent is 60-70 g/L.

Preferably, in the step (3), the softener is one or more of softener MA-700, softener PF, and softener ES, and the amount of the softener is 10-30 g/L.

Preferably, in the step (3), the anti-wrinkle finishing time is 2-4min, the anti-wrinkle finishing temperature is 80-100°C, the softening time is 2-4min, and the softening temperature is 70-100°C.

The present invention also provides a desizing-free flax fabric obtained by the desizing-free flax yarn sizing treatment method.

The principle of the present invention is as follows: the present invention adopts the liquid wax sizing process, the raw materials are readily available, ready to use, easy to store, non-toxic, non-corrosive, and have good chemical stability. The slurry does not need to be boiled, which reduces the desizing process, greatly optimizes the sizing process, reduces a large amount of sewage discharge and the consumption of steam and hydropower, and can achieve the effect of energy saving and emission reduction. Moreover, the invention adopts normal temperature sizing, the subsequent embryonic cloth does not need to be desizing, power resources and costs are greatly reduced, and the yarn hairiness, bundle property, breaking strength and wear resistance after sizing are significantly improved, which can meet the high-speed weaving process of flax. At the same time, linen can also be free of desizing, which can save a lot of electricity and water resources without desizing, and avoid the generation of desizing wastewater, which is in line with the concept of green and environmentally friendly development of my country's textile industry.

As can be seen from the above-mentioned technical solutions, compared with the prior art, the beneficial effects of the present invention are as follows:

1. The sizing treatment scheme of the present invention is simple to operate, does not need to be boiled for sizing at room temperature, and greatly simplifies the technological process of flax yarn sizing;

2. Compared with other traditional pulp sizing treatments, the present invention provides a feasible solution for realizing the non-desizing of flax germ cloth, greatly reduces the energy consumption of hydropower and sewage discharge, and is a major breakthrough in environmental protection;

3. Due to the special size of the present invention, the flax yarn hairiness, polymerization degree and strength after sizing are improved to provide conditions for high-speed weaving of flax, and in addition, the flax fabric is enhanced to enhance its softness, smoothness and other hand-feeling styles. Significant improvement in the overall performance of the fabric.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

Fig. 1 is an image under a microscope of the non-desizing flax fabric obtained in Example 1 of the present invention.

Detailed ways

The invention provides a sizing treatment method for non-desizing flax yarn, comprising the following steps:

(1) sizing: the flax yarn is subjected to sizing treatment on the sizing machine to obtain the sizing yarn;

(2) weaving: the yarn after sizing is weaved to obtain fabric;

(3) Post-finishing: Add resin finishing agent to the fabric for anti-wrinkle finishing, and then add softener for softening finishing, that is, to avoid desizing linen fabric.

In the present invention, in the step (1), the sizing treatment is carried out by means of two dips and two rollings, the flax yarn tension is 250-360N during sizing, and the winding tension is 2100-2430N when the flax is dried after sizing.

Specifically, in the two-dipping and two-rolling method, the pressure of the first pass is small, and its main function is to remove the air in the fabric and generate a certain negative pressure in the fabric, which is conducive to the absorption of dye liquor by the fabric; the pressure of the second pass is large, and the pressure varies according to the rolling Liquid rate requirement setting.

In the present invention, in the step (1), the slurry includes polyvinyl alcohol, paraffin, and styrene-butadiene rubber, and the volume concentration of the slurry is preferably 15-30%, more preferably 20-25%.

In the present invention, the mass ratio of the polyvinyl alcohol, paraffin, and styrene-butadiene rubber is preferably 2-3:10-15:3, more preferably 2:10-12:3.

In the present invention, in the step (1), the speed of the sizing machine is preferably 60-70m/min, more preferably 65m/min; the sizing treatment temperature is preferably 60-80°C, more preferably 75°C.

Specifically, the higher the temperature of the sizing treatment, the better the absorption of the sizing by the fabric during padding and the better the permeability of the sizing. However, considering that the roll is a rubber product, it is easy to age when processed at a high temperature for a long time. In order to prolong the service life of the roll, it is not appropriate to use an excessively high temperature.

In the present invention, in the step (2), the weaving is plain weaving on a rapier loom.

In the present invention, in the step (3), the resin finishing agent is preferably one or more of urea-formaldehyde resin, melamine-formaldehyde resin, thiourea resin and epoxy resin, more preferably melamine-formaldehyde resin or thiourea resin ; The dosage of the resin finishing agent is preferably 60-70 g/L, more preferably 63-68 g/L.

In the present invention, in the step (3), the softener is preferably one or more of softener MA-700, softener PF, and softener ES, more preferably softener PF or softener ES; The dosage of the softener is preferably 10-30 g/L, more preferably 15-20 g/L.

In the present invention, in the step (3), the anti-wrinkle finishing time is preferably 2-4 minutes, more preferably 3 minutes; the anti-wrinkle finishing temperature is preferably 80-100°C, more preferably 90-95°C; the softening finishing time It is preferably 2 to 4 minutes, more preferably 3 minutes; the softening temperature is preferably 70 to 100°C, more preferably 80 to 90°C.

The present invention also provides a desizing-free flax fabric obtained by the desizing-free flax yarn sizing treatment method.

The principle of the present invention is as follows: the present invention adopts the liquid wax sizing process, the raw materials are readily available, ready to use, easy to store, non-toxic, non-corrosive, and have good chemical stability. The slurry does not need to be boiled, the desizing process is reduced, the sizing process is greatly optimized, a large amount of sewage discharge and the use of steam and hydropower are reduced, and the effect of energy saving and emission reduction can be achieved. In addition, the invention adopts normal temperature sizing, the subsequent embryonic cloth does not need to be desizing, the power resource and cost are greatly reduced, and the yarn hairiness, bunching property, breaking strength and wear resistance after sizing are obviously improved, which can meet the high-speed weaving process of flax in the subsequent process. At the same time, the linen can also be free of desizing, which can save a lot of electricity and water resources without desizing, and avoid the generation of desizing wastewater, which is in line with the concept of green and environmentally friendly development of my country's textile industry.

The technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the protection scope of the present invention.

Example 1

Slurry preparation:

Weigh 20g, 100g, and 30g of polyvinyl alcohol, paraffin, and styrene-butadiene rubber, respectively, and configure them into a slurry with a volume concentration of 20%;

Weaving of non-desizing linen fabrics:

The flax yarn is sizing on the sizing machine by means of two dips and two rollings. The speed of the sizing machine is 65m/min, the sizing temperature is 75°C, the tension of the flax yarn during sizing is 280N, and the tension of the flax is wound and rolled up when the flax is dried after sizing. It is 2200N, and the yarn after sizing is obtained; the yarn after the sizing is plain-woven on a rapier loom to obtain a fabric; 65g/L of urea-formaldehyde resin is added to the fabric, and anti-wrinkle finishing is carried out at 90 ° C for 3min. Then add 20g/L softener PF, and soften and finish at 90°C for 3min, that is, to obtain a desizing-free linen fabric.

Example 2

Slurry preparation:

Weigh 20g, 120g, and 30g of polyvinyl alcohol, paraffin, and styrene-butadiene rubber, respectively, and configure them into a slurry with a volume concentration of 20%;

Weaving of non-desizing linen fabrics:

The flax yarn is sizing on the sizing machine by means of two dips and two rollings. The speed of the sizing machine is 65m/min, the sizing temperature is 60°C, the tension of the flax yarn during sizing is 300N, and the tension of the flax is wound and rolled up when the flax is dried after sizing. It is 2250N, and the yarn after sizing is obtained; the yarn after the sizing is subjected to plain weaving on a rapier loom to obtain a fabric; 65g/L of urea-formaldehyde resin is added to the fabric, and anti-wrinkle finishing is carried out at 95 ° C for 3min, Then add 15g/L softener PF, soften and finish at 90°C for 4min, that is, to obtain a desizing-free linen fabric.

Example 3

Slurry preparation:

Weigh 30g, 130g, and 30g of polyvinyl alcohol, paraffin, and styrene-butadiene rubber, respectively, and configure them into a slurry with a volume concentration of 25%;

Weaving of non-desizing linen fabrics:

The flax yarn is sizing on the sizing machine by means of two dips and two rollings. The speed of the sizing machine is 70m/min, the sizing treatment temperature is 75°C, the tension of the flax yarn during sizing is 350N, and the tension of the flax is wound and rolled up when the flax is dried after sizing. It is 2300N, and the sizing yarn is obtained; the sizing yarn is plain weaved on a rapier loom to obtain a fabric; 65g/L of melamine formaldehyde resin is added to the fabric, and anti-wrinkle finishing is performed at 95 ° C for 4min , and then add 15g/L softener PF, soften and finish at 90 ℃ for 4 minutes, that is, to obtain a desizing-free linen fabric.

It can be seen from Figure 1 that the edge clarity is better when printing on linen fabrics by microscope observation, and the transverse permeation phenomenon is not significant during vertical printing, which can achieve good desizing-free printing effect.

In the present invention, the softness, drapability and smoothness of the desizing-free flax fabrics obtained in Examples 1 to 3 were scored and tested on a magic instrument. The softness and comfort of the fabrics reached 83.58 points, the drapability was 80.02 points, and the smoothness was 83.58 points. The overall score is 86.94 points. The yarn after sizing and weaving in this scheme can fully meet the wearing comfort and wearing effect.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. a method for sizing free desizing flax yarn, is characterized in that, comprises the steps: (1) sizing: the flax yarn is subjected to sizing treatment on the sizing machine to obtain the sizing yarn; (2) weaving: the yarn after sizing is weaved to obtain fabric; (3) Post-finishing: Add resin finishing agent to the fabric for anti-wrinkle finishing, and then add softener for softening finishing, that is, to avoid desizing linen fabric. 2 . The sizing treatment method of non-desizing flax yarn according to claim 1 , wherein, in the step (1), the sizing treatment is carried out by means of two dips and two rollings. 3 . 3. The non-desizing flax yarn sizing treatment method according to claim 1, characterized in that, in the step (1), the slurry comprises polyvinyl alcohol, paraffin, and styrene-butadiene rubber, and the slurry volume concentration is 15 ~30%. 4 . The sizing treatment method for non-desizing flax yarn according to claim 3 , wherein the mass ratio of the polyvinyl alcohol, paraffin, and styrene-butadiene rubber is 2-3:10-15:3. 5 . 5. The sizing treatment method for non-desizing flax yarn according to claim 2 or 3, characterized in that, in the step (1), the speed of the sizing machine is 60-70 m/min, and the sizing treatment temperature is 60-80 m/min. °C. 6. The non-desizing flax yarn sizing treatment method according to claim 1, characterized in that, in the step (3), the resin finishing agent is urea-formaldehyde resin, melamine-formaldehyde resin, thiourea resin, epoxy resin One or more of the resin finishing agent dosage is 60～70g/L. 7. non-desizing flax yarn sizing treatment method according to claim 6, is characterized in that, in described step (3), softener is one of softener MA-700, softener PF, softener ES one or more, and the dosage of the softener is 10-30 g/L. 8. The sizing treatment method for non-desizing flax yarn according to claim 6 or 7, characterized in that, in the step (3), the anti-wrinkle finishing time is 2-4 min, and the anti-wrinkle finishing temperature is 80-100 ℃ ℃, the softening time is 2-4min, and the softening temperature is 70-100℃. 9 . The free-desizing flax fabric obtained by the method for sizing free-desizing flax yarn according to any one of claims 1 to 8 .

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