CN104420166A - One bath pretreatment technology for pure cotton yarns - Google Patents

Abstract

The invention discloses a one bath pretreatment technology for pure cotton yarns. The one bath pretreatment technology comprises the following technical steps: adding yarns into a boiler, adding scouring and bleaching liquid according to bath ratio of 1:6, heating to 98 DEG C and preserving heat for 2h, draining liquid when caustic soda and hydrogen peroxide in the scouring and bleaching liquid are respectively lower than 0.4g/L and 0.2g/L, performing hot water washing, performing cold water washing and discharging from the boiler sequentially. The whiteness of the pure cotton yarns can achieve that obtained by adopting a two bath technology, the capillary effect is relatively high, so that dye can be saved during dyeing; the weight loss of the yarns is reduced, the rate of finished products can be improved, the finished products are relatively good in handfeeling, the benefit of the yarns per tonnage can be increased under the condition of deducting the cost of materials; the energy consumption can be decreased, the labor intensity of operating workers can be lightened, the total amount of sewage can be reduced, and the economic benefits and social benefits are both remarkable.

Description

Cotton yarn One-step pretreatment technique

 

Technical field

The invention belongs to field of fabric producing technology, be specifically related to a kind of cotton yarn One-step pretreatment technique.

 

Background technology

The traditional handicraft of cotton yarn pre-treatment is kiering, bleaches two one bath two-step methods.This processing operation time is long, loaded down with trivial details, labour intensity is large, and energy consumption is large, many with water, the sewage of discharge containing assorted many, pH value is higher, cost of sewage disposal is high.In addition, the weight-loss ratio of cotton yarn after two one bath two-step method kierings, bleaching is up to 7% ~ 8%, and this towel for valency by weight, by industry, add loss, and weightlessness causes product feel to be deteriorated too much, easily breaks end in postorder is processed.

 

Summary of the invention

The object of the invention is to, a kind of cotton yarn One-step pretreatment technique is provided, solve that the technique that prior art adopts two one bath two-step method process cotton yarns to exist is loaded down with trivial details, production efficiency is low, labour intensity is large, energy consumption is large, cost of sewage disposal is high, and the problem such as product is weightless large, feel is poor.

Cotton yarn One-step pretreatment technique provided by the invention, it comprises following processing step: yarn enters pot → with bath raio 1 ﹕ 6 and adds and boil bleaching liquor → be warming up to 98 DEG C insulation 2 h → be less than discharge opeing → hot water wash → cold wash when 0.4 g/L and hydrogen peroxide concentration are less than 0.2 g/L → take the dish out of the pot when boiling concentration of caustic soda in bleaching liquor; Described proportioning of boiling bleaching liquor is: hydrogen peroxide (27.5%): 10-14g/L,

Solid caustic soda: 2-2.5g/L,

DF-10 hydrogen peroxide bleaching stabilizer: 4-6g/L,

DF-9906 scouring agent: 4-6g/L.

Cotton yarn One-step pretreatment technique provided by the invention, its beneficial effect is: yarn can reach the whiteness of two bath process comprehensively; Because capillary effect is higher, can save dyestuff during dyeing, and the weightlessness of yarn reduces, and improves yield rate, and finished product feel is better, when deducting materials cost and increasing, yarn per ton still can increase the benefit of nearly 500 yuan; Decrease energy resource consumption, alleviate the labour intensity of operator, reduce sewage total amount, economic benefit and social benefit are all remarkable.

 

Detailed description of the invention

Below in conjunction with an embodiment, cotton yarn One-step pretreatment technique provided by the invention is described in detail.

 

Embodiment

The cotton yarn One-step pretreatment technique of the present embodiment, it comprises following processing step: yarn enters pot → with bath raio 1 ﹕ 6 and adds and boil bleaching liquor → be warming up to 98 DEG C insulation 2 h → be less than discharge opeing → hot water wash → cold wash when 0.4 g/L and hydrogen peroxide concentration are less than 0.2 g/L → take the dish out of the pot when boiling concentration of caustic soda in bleaching liquor; Described proportioning of boiling bleaching liquor is: hydrogen peroxide (27.5%): 12g/L,

Solid caustic soda: 2.2g/L,

DF-10 hydrogen peroxide bleaching stabilizer: 5g/L,

DF-9906 scouring agent: 5g/L.

Claims (1)

1. a cotton yarn One-step pretreatment technique, it is characterized in that, it comprises following processing step: yarn enters pot → with bath raio 1 ﹕ 6 and adds and boil bleaching liquor → be warming up to 98 DEG C insulation 2 h → be less than discharge opeing → hot water wash → cold wash when 0.4 g/L and hydrogen peroxide concentration are less than 0.2 g/L → take the dish out of the pot when boiling concentration of caustic soda in bleaching liquor;

Described proportioning of boiling bleaching liquor is:

Hydrogen peroxide (27.5%): 10-14g/L,

Solid caustic soda: 2-2.5g/L,

DF-10 hydrogen peroxide bleaching stabilizer: 4-6g/L,

DF-9906 scouring agent: 4-6g/L.