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Water-soluble slurry capable of being quickly desized

A water-soluble and desizing technology, applied in the field of polyester sizing, can solve the problems of high adhesion, unsatisfactory sizing effect of polyester-cotton blended fabrics, and difficulty in desizing.

Active Publication Date: 2021-05-18
湖北山特莱新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The three major sizing effects are not ideal for sizing polyester-cotton blended fabrics with a high proportion of polyester
[0004] Water-soluble polyester has a similar molecular structure to polyester fiber, so it has excellent adhesion to polyester fiber. Using water-soluble polyester as a size can greatly improve the sizing performance of polyester. It can be dissolved in water, but the adhesion between polyester size and polyester is relatively strong, which will cause difficulty in desizing

Method used

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  • Water-soluble slurry capable of being quickly desized

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] S1. Alcoholysis: Put 100 parts of recycled polyester and 45 parts of ethylene glycol into the esterification kettle at room temperature and pressure and mix for 20-40 minutes, then raise the temperature to 220°C for pre-alcoholysis for 30-60 minutes;

[0030] S2, beating: 10 parts of sodium pentasulfonate isophthalate, 5.5 parts of isophthalic acid, zinc acetate, 8 parts of stearic acid, 5 parts of dimethylol butyric acid, 6 parts of polyethylene glycol 600, hexyl 1 part of diacid, 0.5 part of anti-ether agent and the alcoholysis solution in step S1 were beaten and mixed for 10 minutes in an esterification kettle;

[0031] S3. Esterification: Control the temperature in the esterification kettle at 260° C., esterify for 2 hours to generate ethylene terephthalate, and add 5 parts of diethylene glycol after 2 hours of esterification;

[0032] S4. Filtration: the temperature of the filter is raised to 250°C, and the esterification liquid in the esterification tank is filter...

Embodiment 2

[0037] S1. Alcoholysis: put 100 parts of recycled polyester and 35 parts of ethylene glycol into the esterification tank at room temperature and pressure and mix for 40 minutes, then raise the temperature to 220°C for pre-alcoholysis for 60 minutes;

[0038] S2, beating: 8 parts of sodium pentasulfonate isophthalate, 18 parts of isophthalic acid, zinc acetate, 5 parts of stearic acid, 8 parts of dimethylol butyric acid, 2 parts of ethylene glycol, 6 parts of polystyrene Ether diol 400, 1 part of polyester polyol, 0.5 part of anti-ether agent and the alcoholysis solution in step S1 were beaten and mixed in an esterification kettle for 10 minutes;

[0039] S3. Esterification: Control the temperature in the esterification kettle at 260°C, and perform esterification for 2 hours to generate ethylene terephthalate;

[0040] S4. Filtration: the temperature of the filter is raised to 270°C, and the esterification liquid in the esterification tank is filtered to remove insoluble matter...

Embodiment 3

[0045] S1. Alcoholysis: put 100 parts of recycled polyester and 40 parts of ethylene glycol into the esterification tank at room temperature and pressure and mix for 30 minutes, then raise the temperature to 230°C for pre-alcoholysis for 45 minutes;

[0046] S2, beating: 19 parts of sodium pentasulfonate isophthalate, 12 parts of isophthalic acid, zinc acetate, 6.5 parts of stearic acid, 6.5 parts of dimethylol butyric acid, 3.5 parts of polyethylene glycol 600, hexane 2 parts of diacid, 0.3 parts of anti-ether agent and the alcoholysis solution in step S1 were beaten and mixed for 15 minutes in an esterification kettle;

[0047]S3. Esterification: Control the temperature in the esterification kettle at 250°C, esterify for 2.8 hours to generate ethylene terephthalate, and add 3.5 parts of diethylene glycol after 1.5 hours of esterification;

[0048] S4. Filtration: the temperature of the filter is raised to 260°C, and the esterification liquid in the esterification tank is fil...

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Abstract

The invention belongs to the technical field of polyester sizing agents, and discloses a water-soluble sizing agent capable of being quickly desized, which is prepared by the following steps: conducting pre-alcoholysis on recycled polyester and ethylene glycol for 30-60 minutes in parts by mass; beating and mixing 8-10 parts of 5-sulfoisophthalic acid monosodium salt, 5.5-18 parts of isophthalic acid, zinc acetate, 5-8 parts of stearic acid and the alcoholysis solution for 10-20 minutes; controlling the temperature in the esterification kettle to be 240-260 DEG C, and conducting esterification for 2-3.5 h; heating a filter to 250-270 DEG C, filtering the esterification liquid in the esterification kettle to remove insoluble substances and oligomers, and pouring the filtrate into a polymerization kettle; and adding 2.5-5 parts of polyether into the polymerization kettle, and conducting polymerizing under the conditions that the vacuum degree is less than or equal to 100Pa, the temperature is 270-275 DEG C and the polymerization time is 3-3.5 hours to obtain a water-soluble polyester slurry melt. The invention has the beneficial effects that in the process of desizing by adopting the alkaline desizing liquid, stearate groups are easy to hydrolyze to generate a large amount of hydroxyl groups, so that the polyester slurry and polyester are repelled, and rapid desizing is facilitated.

Description

technical field [0001] The invention belongs to the technical field of polyester size, in particular to a water-soluble size capable of rapid desizing. Background technique [0002] The current textile materials are three pillars of modified starch, PVA, and acrylic size, but their respective shortcomings are also obvious. The sizing effect of the three major sizing materials on polyester-cotton blended fabrics containing a high proportion of polyester is not ideal. PVA has insufficient adhesion to polyester fibers, is prone to skinning and has environmental protection problems. Polyacrylate sizing is easy to heat and stick again, and its adhesion to polyester and other highly hydrophobic fibers is still insufficient. Starch sizing can only be used for Cotton fibers have better adhesion. [0003] The Chinese invention patent with authorized notification number CN 104988733 B discloses water-soluble polyester size for FDY filament sizing and water-jet weaving and its prepar...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78D06M15/507D06M101/32
CPCC08G63/672C08G63/78D06M15/507D06M2101/32D06M2200/40
Inventor 陈春华周重旭丁成城
Owner 湖北山特莱新材料有限公司
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