Method for coating woven bag with isocyanate composition

A woven bag, coating technology, applied in the direction of one-component polyolefin rayon filament, 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

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 21

[0018] Polyvinyl alcohol 46

[0019] Isocyanate 35

[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 embodiment 1, the coating process of woven bag is roughly the same as embodiment 1, and difference is that coating comprises following component (mass part) and content:

[0025] Ethylene-vinyl acetate copolymer 25

[0026] Polyvinyl alcohol 55

[0027] Isocyanate 55

[0028] Polyether diol 40

[0029] Diethyltoluenediamine 30

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

Embodiment 3

[0032] Repeat embodiment 1, the coating process of woven bag is roughly the same as embodiment 1, and difference is that coating comprises following component (mass part) and content:

[0033] Ethylene-vinyl acetate copolymer 23

[0034] Polyvinyl alcohol 50

[0035] Isocyanate 45

[0036] Polyether diol 30

[0037] Diethyltoluenediamine 20

[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 discloses a woven bag coating method which comprises the following steps of: weaving warps and wefts made from fiber materials into a cylindrical fiber woven layer on a circular weaving machine; spraying the coating prepared on site onto the inner side of the woven layer to form a lining, wherein the coating comprises the following components in parts by mass: 21-25 parts of ethylene-vinyl acetate copolymer, 46-55 parts of polyvinyl alcohol, 35-55 parts of isocyanate, 20-40 parts of polyether glycol and 10-30 parts of diethyl methyl benzene diamine; and drying to obtain a product of inner-spraying woven bag.

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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IPC IPC(8): D06M15/568D06M15/227D01F6/46D06M101/20
Inventor 张明
Owner QINGDAO BAIZHONG CHEM TECH
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