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Method for performing gas bleaching on linen fabric by ozone

A technology of gas-phase bleaching and linen fabrics, which is applied to plant fibers, textiles, papermaking, and dry-cleaning fiber products. It can solve the problems of poor whiteness of bleached linen fabrics, easy yellowing of fabrics, high water consumption, etc., and meet the requirements of personal protection. Low, less human injury, less water consumption

Inactive Publication Date: 2017-05-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems of high energy consumption, high water consumption, high pollution, high discharge and personnel and equipment protection existing in the existing bleaching process of linen fabrics, in order to solve the problems of poor whiteness of bleached linen fabrics, easy yellowing of fabrics after bleaching, and brittle damage, etc. problem, the present invention provides a more suitable method of bleaching linen fabrics and a method of preventing yellowing of bleached fabrics

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for performing gas bleaching on linen fabric by ozone
  • Method for performing gas bleaching on linen fabric by ozone
  • Method for performing gas bleaching on linen fabric by ozone

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Embodiment 1: the ozone bleaching of hemp fabric

[0046] Linen fabric material: linen plain weave fabric.

[0047] Bleaching of linen fabrics is carried out as follows:

[0048] (1) Squeeze liquid process: place the hemp fabric after desizing and refining to soak in soft water, and process to make the liquid carrying rate of the fabric 30%;

[0049] (2) Bleaching process: Place a fabric with a certain liquid rate in the reactor, the ozone is input from one end, and the tail gas is output from the other end; the ozone concentration in the reactor is controlled to 240mg / L, the bleaching time is 20min, and the bleaching temperature is 10 ℃;

[0050] (3) Post-treatment process: After bleaching, take out the fabric, first wash it with hot water at 50-60°C, then wash it with cold water, and dry it.

[0051] The whiteness of the hemp fabric treated by this method has increased from -10 of the original fabric to 64; the whiteness decreased by 3 after being placed under vacu...

Embodiment 2

[0052] Embodiment 2: the ozone bleaching of hemp fabric

[0053] Linen fabric material: linen plain weave fabric.

[0054] Bleaching of linen fabrics is carried out as follows:

[0055] (1) Squeeze liquid process: place the hemp fabric after desizing and refining to soak in soft water, and process to make the liquid carrying rate of the fabric 20%;

[0056](2) Bleaching process: Place a fabric with a certain liquid rate in the reactor, the ozone is input from one end, and the tail gas is output from the other end; the ozone concentration in the reactor is controlled to 240mg / L, the bleaching time is 10min, and the bleaching temperature is 25 ℃;

[0057] (3) Post-treatment process: After bleaching, take out the fabric, first wash it with hot water at 60°C, then wash it with cold water, and dry it.

[0058] The whiteness of the hemp fabric treated according to this method has increased from -10 to 58 from the original cloth; the whiteness decreased by 5 after being placed und...

Embodiment 3

[0059] Embodiment 3: the ozone bleaching of hemp fabric

[0060] Linen fabric material: linen plain weave fabric.

[0061] Bleaching of linen fabrics is carried out as follows:

[0062] (1) Squeeze liquid process: place the hemp fabric after desizing and refining to soak in soft water, and process to make the liquid carrying rate of the fabric 40%;

[0063] (2) Bleaching process: Place a fabric with a certain liquid rate in the reactor, the ozone is input from one end, and the tail gas is output from the other end; the ozone concentration in the reactor is controlled to 240mg / L, the bleaching time is 15min, and the bleaching temperature is 35 ℃;

[0064] (3) Post-treatment process: After bleaching, take out the fabric, first wash it with hot water at 60°C, then wash it with cold water, and dry it. .

[0065] The whiteness of the hemp fabric treated by this method has increased from -10 to 59 of the original fabric; the whiteness has decreased by 4 after being placed under ...

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Abstract

The invention discloses a method for performing gas bleaching on a linen fabric by ozone, and belongs to the technical field of spinning. The ozone with high oxidation reduction performance is used for performing linen fabric bleaching, so that chromophoric group lignin and the like in pigment are destroyed to achieve the goals of bleaching and decoloration. The method has the advantages that the linen fabric whiteness improving effect is obvious; a reported bleaching effect can be achieved after the bleaching for 20min; after the bleaching, the linen fabric wettability is improved; the pectin and waxiness content is reduced; the dyeing performance can be improved. The fabric subjected to ozone treatment is also subjected to detergent washing treatment by a free radical scavenger solution; hydroxyl radicals, active oxygen atoms and the like remained on the fabric are removed; performance indexes such as the whiteness value and the polymerization degree of the fabric in a subsequent placement process are enabled to be stable.

Description

technical field [0001] The invention relates to a method for gas-phase bleaching linen fabrics by using ozone, which belongs to the technical field of textiles. Background technique [0002] Bleaching agents commonly used in the bleaching of linen fabrics are sodium hypochlorite, hydrogen peroxide and sodium chlorite. When they are used alone, the bleaching effect cannot be achieved due to the high content of impurities in the hemp fiber, especially the lignin content. The existing linen fabric bleaching mainly uses the oxygen combined bleaching process. This bleaching process requires two bleaching steps. In the sodium chlorite bleaching stage, sodium chlorite needs to be added under the conditions of strong acidity, 50°C, and additives for bleaching. After bleaching, fully wash and dry. In the stage of hydrogen peroxide bleaching, bleaching needs to add hydrogen peroxide under the condition of strong alkali (pH 10-11), high temperature (95°C) and auxiliary agent. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06L4/50D06L1/16D06M11/34D06M13/372D06M101/06
CPCD06L1/16D06M11/34D06M13/372D06M2101/06
Inventor 王强范雪荣李文余圆圆王平袁久刚崔莉张颖
Owner JIANGNAN UNIV
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