Process for coating polyether glycol composition in woven bag

A woven bag and coating technology, applied in the direction of single-component polyolefin artificial filaments, etc.

Inactive Publication Date: 2013-03-27
QINGDAO BAIZHONG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing woven bag surface coating methods and provide a wear-resistant, corrosion-resistant, high-strength, long-life , while the production process is simple, high efficiency, non-polluting woven bag coating method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] According to the polypropylene resin that is 100 parts by weight, add the antioxidant 1010 that is 0.4 part by weight, the ultraviolet absorber UV-327 that is 0.5 part by weight, the auxiliary antioxidant DLTP that is 0.6 part by weight; The mixture obtained is passed The extruder and wire drawing machine are stretched and wound to make polypropylene filament. On a circular loom, polypropylene yarn is used as warp and weft to weave a cylindrical fiber braided layer, and then the paint is sprayed on the inner side of the braided layer to form an inner lining. The paint includes the following components (parts by mass) and content:

[0017] Ethylene-vinyl acetate copolymer 26

[0018] Polyvinyl alcohol 56

[0019] Isocyanate 30

[0020] Polyether diol 20

[0021] Diethyltoluenediamine 10.

[0022] After the above-mentioned coating components are fully mixed on-site, under the conditions of temperature 45°C and pressure 10MPa, use a spray gun to spray on the inner side...

Embodiment 2

[0024] Repeat Example 1, the coating process of the woven bag is roughly the same as Example 1, and the difference is that the coating includes the following components (parts by mass) and content:

[0025] Ethylene-vinyl acetate copolymer 30

[0026] Polyvinyl alcohol 65

[0027] Isocyanate 40

[0028] Polyether diol 40

[0029] Diethyltoluenediamine 25

[0030] The spraying temperature is 60°C, the spraying pressure is 15MPa, and the spraying thickness is 0.6mm.

Embodiment 3

[0032] Repeat Example 1, the coating process of the woven bag is roughly the same as Example 1, and the difference is that the coating includes the following components (parts by mass) and content:

[0033] Ethylene-vinyl acetate copolymer 28

[0034] Polyvinyl alcohol 60

[0035] Isocyanate 35

[0036] Polyether diol 30

[0037] Diethyltoluenediamine 18

[0038] The spraying temperature is 53°C, the spraying pressure is 13MPa, and the spraying thickness is 0.3mm.

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Abstract

The invention provides a coating method of a woven bag. The method comprises the following steps of in sequence: weaving warps and wefts by a circular weaving machine to obtain a cylindrical fiber woven layer, wherein the warps and the wefts are manufactured by fiber materials; spraying a coating which is prepared at site on the inner side of the woven layer so as to obtain a lining, wherein the coating comprises the following components by mass: 26 to 30 parts of ethylene-vinyl-acetate copolymer, 56 to 65 parts of polyvinyl alcohol; 30 to 40 parts of isocyanate, 22 to 40 parts of polyether glycol, and 10 to 25 parts of diethyltoluenediamine; and then drying to obtain the internally-coated woven bag product.

Description

technical field [0001] The invention relates to a coating method, in particular to a coating method for woven bags. Background technique [0002] Woven bags are widely used in industry, agriculture, construction and other industries to transport powder products. Woven bags are usually woven from cross-woven wires, and there are tiny gaps at the intersections of the woven wires. In order to make up for this defect, people have used polyethylene resin for the surface coating of woven bags. This coating is easy to age and fall off, is not wear-resistant, and has a short service life. The manufacturing method of this kind of surface coated woven bag is: weave the fiber tube on the circular loom first, then add the coating resin into the extruder, extrude the hot melt film through the extruder, and coat it on the braided tube The outer surface of the object becomes a product. This production method requires more production equipment, consumes a lot of energy, and has requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/568D06M15/227D01F6/46D06M101/20
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
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