A water-soluble size capable of rapid desizing

A water-soluble and water-soluble polyester 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, so as to achieve easy sizing and avoid serous film breakage. , the effect of shortening the esterification time

Active Publication Date: 2022-05-24
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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  • A water-soluble size capable of rapid desizing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] S1, alcoholysis: put 100 parts of recovered polyester and 45 parts of ethylene glycol into the esterification kettle and mix at normal temperature and pressure for 20-40min, then heat up to 220°C for pre-alcoholysis for 30-60min;

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

[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 esterification for 2 hours;

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

Embodiment 2

[0037] S1, alcoholysis: put 100 parts of recovered polyester and 35 parts of ethylene glycol into the esterification kettle and mix at normal temperature and pressure for 40min, then heat up to 220°C for pre-alcoholysis for 60min;

[0038] S2, beating: 8 parts of sodium pentasulfonate isophthalate, 18 parts of isophthalic acid, zinc acetate, 5 parts of stearic acid, 8 parts of dimethylolbutyric acid, 2 parts of ethylene glycol, 6 parts of poly 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 10min;

[0039] S3. Esterification: the temperature in the esterification kettle is controlled at 260°C, and the esterification is carried out for 2h to generate ethylene terephthalate;

[0040] S4. Filtration: the temperature of the filter is raised to 270°C, and after filtering the esterification liquid in the esterification kettle to remove insolubles and oligomers, the ...

Embodiment 3

[0045] S1, alcoholysis: put 100 parts of recovered polyester and 40 parts of ethylene glycol into the esterification kettle and mix at normal temperature and pressure for 30min, then heat up to 230°C for pre-alcoholysis for 45min;

[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, hexamethylene glycol 2 parts of diacid, 0.3 part of anti-ether agent and the alcoholysis solution in step S1 were beaten and mixed in the esterification kettle for 15min;

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

[0048] S4. Filtration: the temperature of the filter is raised to 260°C, and after filtering the esterification liquid in the esterification kettle to remo...

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Abstract

The invention belongs to the technical field of polyester size, and discloses a water-soluble size capable of rapid desizing, which comprises the following steps in parts by mass: pre-alcoholyzing recycled polyester and ethylene glycol for 30 to 60 minutes; 8-10 parts of sodium phthalic acid pentasulfonate, 5.5-18 parts of isophthalic acid, 5-8 parts of zinc acetate, stearic acid and alcoholysis solution for beating and mixing for 10-20 minutes; control the temperature in the esterification tank at 240 ~260°C, esterification for 2‑3.5h; the filter temperature is raised to 250~270°C, the esterification liquid in the esterification tank is filtered to remove insolubles and oligomers, and the filtrate is poured into the polymerization tank; Add 2.5-5 parts of polyether, and carry out polymerization under the conditions of vacuum degree ≤ 100 Pa, temperature 270-275°C, and polymerization time 3-3.5 hours to obtain a water-soluble polyester slurry melt. The beneficial effect of the present invention is: in the process of desizing with alkaline desizing liquid, the stearate group is easily hydrolyzed to generate a large number of hydroxyl groups, which makes the repulsion between polyester size and polyester, which is conducive to rapid desizing .

Description

technical field [0001] The invention belongs to the technical field of polyester pulp, and particularly relates to a water-soluble pulp that can be rapidly desized. Background technique [0002] The current textile awards are three pillars of modified starch, PVA, and acrylic size, but their shortcomings are also obvious. The three sizes are not ideal for sizing polyester-cotton blended fabrics with high proportion of polyester. PVA has insufficient adhesion to polyester fibers, is prone to skinning and has environmental problems, polyacrylate pulp is easy to heat and rebond, and the adhesion to polyester and other highly hydrophobic fibers is still insufficient, and starch pulp can only be used for Cotton fibers have better adhesion. [0003] The Chinese invention patent with the authorization announcement number of CN 104988733 B discloses a water-soluble polyester size for FDY filament sizing for water-jet weaving and a preparation method thereof. The salt or its deriv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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