阅读说明：本技术 一种超细纤维连续生产的碱减量生产工艺 (Alkali decrement production process for continuous production of superfine fibers ) 是由 李桂军 李浩扬 张锋 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种超细纤维连续生产的碱减量生产工艺,包括以下步骤,步骤一浸碱处理,将坯布放卷导辊传送至浸碱室内的碱液槽内浸碱,碱液浓度为2-30%,浸碱时间为10-50min,浸碱温度为20-50℃；步骤二碱减量,从浸碱室出来的坯布依次进入到至少两级减量室进行碱减量。相比传统的减量室内直接加热到98℃-100℃,本发明工艺通过设置多级减量室来实现梯度升温,这种设计的好处是对纤维起到保护作用,因为温度越高,对纤维的破坏作用越强,因为纤维中树脂是怕碱的,所以梯度升温的时候可以对树脂起到保护作用的同时坯布中的海岛纤维中的海部分能够被去除。(The invention discloses an alkali decrement production process for continuous production of superfine fibers, which comprises the following steps of carrying out alkali leaching treatment, namely conveying a grey cloth unwinding guide roller into an alkali liquid tank in an alkali leaching chamber for alkali leaching, wherein the concentration of alkali liquid is 2-30%, the alkali leaching time is 10-50min, and the alkali leaching temperature is 20-50 ℃; and step two, alkali decrement, namely, the grey cloth from the alkali leaching chamber sequentially enters at least two stages of decrement chambers to carry out alkali decrement. Compared with the traditional decrement chamber which is directly heated to 98-100 ℃, the process realizes gradient temperature rise by arranging the multistage decrement chambers, and the design has the advantages that the fiber is protected, the higher the temperature is, the stronger the damage effect on the fiber is, and the resin in the fiber is afraid of alkali, so that the resin can be protected while the sea part in the sea-island fiber in the grey cloth can be removed during the gradient temperature rise.)

1. An alkali decrement production process for continuously producing superfine fibers is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

step one of caustic dip treatment

Conveying the unwinding guide roller for impregnated gray fabric to an alkali solution tank in an alkali solution chamber for alkali impregnation, wherein the concentration of alkali solution is 2-30%, the alkali impregnation time is 10-50min, and the alkali impregnation temperature is 20-50 ℃;

step two alkali decrement

The grey cloth from the alkali leaching chamber sequentially enters at least two stages of reduction chambers for alkali reduction, the grey cloth is conveyed to the alkali tank passing through the alkali amount chamber for alkali leaching, the concentration of alkali liquor in each stage of reduction chamber is 2-30%, the temperature of the alkali liquor in each stage of reduction chamber is raised from front to back to 98 ℃, and the treatment time is 10-50 min;

step three water washing

The grey cloth from the last decrement chamber enters at least a 2-6-level front washing chamber for repeated rolling and washing, and the washing temperature of each washing chamber is gradually decreased from front to back to the room temperature;

step four acid neutralization

Conveying the grey cloth into an acid solution tank in an acid solution chamber for pickling, wherein the concentration of the acid solution is 2-30%, the pickling time is 10-50min, and the pickling temperature is 20-50 ℃;

step five, washing with water again

Continuously feeding the grey cloth from the acid liquor chamber into a rear washing chamber for repeatedly rolling and washing, wherein the washing temperature is room temperature;

step six drying

The grey cloth from the back washing chamber enters a drying chamber for drying, a multistage drying chamber is arranged in the drying chamber, the temperature of the drying chamber is in a rising trend from front to back, the highest temperature is 148-150 ℃, and finally the grey cloth is wound from the drying chamber.

2. The alkali weight reduction production process for the continuous production of superfine fibers according to claim 1, wherein the alkali weight reduction production process comprises the following steps: the alkali liquor is 2-30% of sodium hydroxide or potassium hydroxide.

3. The alkali weight reduction production process for the continuous production of superfine fibers according to claim 1, wherein the alkali weight reduction production process comprises the following steps: the acid solution is at least one of tartaric acid, oxalic acid, malic acid, citric acid, benzoic acid, salicylic acid and caffeic acid.

4. The alkali weight reduction production process for the continuous production of superfine fibers according to claim 1, wherein the alkali weight reduction production process comprises the following steps: the grey cloth is made of a fully-aqueous polyurethane resin impregnated figured fiber grey cloth.

5. The alkali weight reduction production process for the continuous production of superfine fibers according to claim 1, wherein the alkali weight reduction production process comprises the following steps: the upper end of the inner top plate of the reduction chamber is provided with a heating device, and the heating temperature of the heating device is 100-105 ℃.

Technical Field

The invention relates to a production process, in particular to an alkali decrement production process for continuously producing superfine fibers.

Background

The alkali deweighting process is mostly a process of treating terylene and chinlon fabrics in high-temperature and strong alkali liquor, utilizes the hydrolysis, corrosion and falling off of sea components in the fabrics by the alkali liquor to promote the relaxation of fiber fabric tissues, reduce the quality, reduce the fiber diameter and form pits on the surface, thereby ensuring that the fabrics have soft hand feeling, soft luster and enhanced drapability, not only improving the moisture absorption and sweat releasing performance and the dyeability of the fabrics, but also ensuring that the fabrics have the common style of silk and achieving the production process that the fabrics have real silk feeling.

Disclosure of Invention

The invention mainly aims to provide an alkali decrement production process for continuously producing superfine fibers, which can ensure that the physical properties of gray fabric are consistent and the hand feeling is good and can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that: an alkali decrement production process for continuously producing superfine fibers comprises the following steps,

step one of caustic dip treatment

Conveying the unwinding guide roller for impregnated gray fabric to an alkali solution tank in an alkali solution chamber for alkali impregnation, wherein the concentration of alkali solution is 2-30%, the alkali impregnation time is 10-50min, and the alkali impregnation temperature is 20-50 ℃;

alkali decrement in step two

The grey cloth from the alkali leaching chamber sequentially enters at least two stages of reduction chambers for alkali reduction, the grey cloth is conveyed to the alkali tank passing through the alkali amount chamber for alkali leaching, the concentration of alkali liquor in each stage of reduction chamber is 2-30%, the temperature of the alkali liquor in each stage of reduction chamber is raised from front to back to 98 ℃, and the treatment time is 10-50 min;

step three water washing

The grey cloth from the last decrement chamber enters at least a 2-6-level front washing chamber for repeated rolling and washing, and the washing temperature of each washing chamber is gradually decreased from front to back to the room temperature;

step four acid neutralization

Conveying the grey cloth into an acid solution tank in an acid solution chamber for pickling, wherein the concentration of the acid solution is 2-30%, the pickling time is 10-50min, and the pickling temperature is 20-50 ℃;

step five, washing with water again

Continuously feeding the grey cloth from the acid liquor chamber into a rear washing chamber for repeatedly rolling and washing, wherein the washing temperature is room temperature;

step six drying

The grey cloth from the back washing chamber enters a drying chamber for drying, a multistage drying chamber is arranged in the drying chamber, the temperature of the drying chamber is in a rising trend from front to back, the highest temperature is 148-150 ℃, and finally the grey cloth is wound from the drying chamber.

Further, the alkali liquor is 2-30% of sodium hydroxide or potassium hydroxide.

Further, the acid solution is at least one of tartaric acid, oxalic acid, malic acid, citric acid, benzoic acid, salicylic acid and caffeic acid.

Further, the grey cloth is a fully-aqueous polyurethane resin impregnated figured fiber grey cloth.

Furthermore, a heating device is arranged at the upper end of the inner top plate of the reduction chamber, and the heating temperature of the heating device is 100-105 ℃.

Compared with the prior art, the invention has the following beneficial effects:

firstly, compared with the traditional method of directly heating to 98-100 ℃ in a weight reducing chamber, the process of the invention realizes gradient temperature rise by arranging a plurality of weight reducing chambers, because the resin in the fiber is afraid of alkali, the design has the advantage of protecting the fiber, because the higher the temperature is, the stronger the damage effect on the fiber is, and because the resin in the fiber is afraid of alkali, the sea part in the sea-island fiber in the grey cloth can be removed while the resin is protected during gradient temperature rise.

Secondly, the temperature of the top of the decrement chamber is kept at 100-105 ℃, so that the problem that alkali liquor steam upwards forms alkali liquor drops on the top of the decrement chamber due to the fact that a heating coil is arranged at the bottom of the traditional method, the alkali liquor drops can drop after the alkali liquor drops are accumulated for a certain time, alkali spots can be formed if the alkali liquor drops on the processed grey cloth, stripes can be formed on the finally obtained cloth, the product quality is affected, and the temperature in the decrement chamber is relatively uniform due to the heating of the top of the decrement chamber, so that the problem is solved;

thirdly, the grey cloth is subjected to alkali leaching in the alkali leaching chamber, and the alkali leaching is continued in the decrement chamber, so that the sea components in the sea-island fibers in the grey cloth can be thoroughly removed, and the decrement effect is ensured; in addition, most of alkali liquor can be removed by matching with the front washing chamber, then the acid liquor in the acid neutralizing chamber is used for neutralizing the rest alkali liquor, fibers are protected better, and finally the fibers are washed by the water in the rear washing chamber, and then the fibers are dried in the drying chamber after the acid liquor is removed.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

The following examples relate to the preparation of grey cloth:

a. preparing impregnation water-based PU slurry: weighing 70 parts by mass of waterborne PU resin, 15 parts by mass of water-soluble powder, 0.4 part by mass of waterborne thickener, 0.7 part by mass of organosilicon hand feeling agent, 3 parts by mass of organosilicon softening agent, 15 parts by mass of filler and 0.4 part by mass of waterborne defoamer, and mixing to prepare milky homogeneous viscous liquid for later use;

b. impregnation of the figured island microfiber non-woven fabric: b, adding the impregnation slurry prepared in the step a into an impregnation tank, and enabling the fixed island microfiber non-woven fabric to pass through the impregnation tank at a constant speed of 300-600m/h to fully soak the aqueous PU slurry;

c. rolling out: extruding partial impregnation liquid from the microfiber grey cloth soaked with the aqueous PU slurry through a pair of rollers, and adjusting the gap between the rollers to ensure that the mass of the microfiber grey cloth soaked with the aqueous PU slurry is 60-120% of the mass of the grey cloth;

d. drying in a drying oven: the extruded gray fabric impregnated with the aqueous PU slurry enters an oven with the temperature of 100-150 ℃ at the speed of 300-600m/h for drying and curing to obtain impregnated gray fabric;