Hot melt adhesive powder for polyethylene/polyurethane foam bonding, and preparation method and application thereof

A polyurethane foam and polyethylene technology, applied in the application, chemical instruments and methods, graft polymer adhesives and other directions, can solve the problems of poor adhesion of the polyurethane foam layer, etc., and achieve good thermal insulation effect, cost reduction, appearance smooth effect

Active Publication Date: 2021-03-23
SHANDONG DONGHONG PIPE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a polyethylene / polyurethane foam bonding hot-melt adhesive powder and its preparation method and application, to solve the problem of spraying and winding the polyethylene outer protection of the thermal insulation pipe in the prior art. Problems with poor adhesion of ply / polyurethane foam ply

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  • Hot melt adhesive powder for polyethylene/polyurethane foam bonding, and preparation method and application thereof

Examples

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preparation example Construction

[0035] In one embodiment of the present invention, a kind of preparation method of the above-mentioned hot melt adhesive powder for polyethylene / polyurethane foam bonding is provided, and the specific steps are:

[0036] S1 Blending and granulation: After mixing the polar monomer-modified polyethylene, polyethylene, ethylene-vinyl acetate copolymer, and functional additives in proportion, the blend is extruded with a twin-screw extruder Granulate at 180°C-250°C, cut into pellets and dry for later use;

[0037] S2 milling: grind the blended and granulated materials in S1 with a plastic mill, and control the particle size of the powder to be 10 mesh to 200 mesh.

[0038] In one embodiment of the present invention, there is provided a kind of application of the above-mentioned hot melt adhesive powder for polyethylene / polyurethane foam bonding in spraying and winding insulation pipes;

[0039] In a specific embodiment, the method of application is: before the curing of the polyu...

Embodiment 1

[0042] Hot melt adhesive powder for polyethylene / polyurethane foam bonding, the composition of raw materials:

[0043] High-density polyethylene grafted with maleic anhydride (the graft rate of maleic anhydride is 0.8%) 99.5%;

[0044] Antioxidant B215 0.5%.

[0045] The specific steps for the preparation of hot melt adhesive powder for polyethylene / polyurethane foam bonding are:

[0046] S1 Blending and granulation: After mixing the high-density polyethylene grafted with maleic anhydride and antioxidant B215 evenly, use a twin-screw extruder to granulate the blend at 190°C-210°C, and dry it for later use ;

[0047] S2 milling: the blended and granulated material in S1 is milled with a plastic mill, and the particle size of the powder is controlled to be 30 mesh.

[0048] Application of hot melt adhesive powder for polyethylene / polyurethane foam bonding on spray-coated winding insulation pipes:

[0049] Choose dn508 steel pipe, after the surface is shot blasted and deruste...

Embodiment 2

[0051] Hot melt adhesive powder for polyethylene / polyurethane foam bonding, the composition of raw materials:

[0052] Acrylic acid grafted high-density polyethylene (grafting rate of acrylic acid is 2.5%) 30%;

[0053] PE 80 pipe material (DGDB 2480) 65%;

[0054] Carbon black masterbatch (carbon black content 45%) 4.5%;

[0055] Antioxidant 1010 0.5%.

[0056] The specific steps for the preparation of hot melt adhesive powder for polyethylene / polyurethane foam bonding are:

[0057] S1 Blending and granulation: Acrylic grafted high-density polyethylene, PE 80 pipe material, carbon black masterbatch, antioxidant 1010 are mixed evenly, and the blend is heated at 210°C-220°C with a twin-screw extruder Carry out granulation, cut into granules and dry for later use;

[0058] S2 milling: grind the blended and granulated materials in S1 with a plastic mill, and control the particle size of the powder to 50 mesh.

[0059] Application of hot melt adhesive powder for polyethylene / ...

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Abstract

The invention discloses hot melt adhesive powder for polyethylene / polyurethane foam as well as a preparation method and application of the hot melt adhesive powder. The powder comprises the followingcomponents in percentage by weight: 30%-99.5% of polar monomer modified polyethylene, 0-65% of polyethylene, 0-30% of ethylene-vinyl acetate copolymer and 0.5%-5% of functional additive. The hot meltadhesive powder is obtained by conducting extruding, blending and granulating by means of a double-screw extrusion process and conducting mechanical grinding. The powder has good processability, has excellent adhesive strength to polyethylene / polyurethane foam, is applied to spraying and winding of a thermal insulation pipe, and can improve the interlayer bonding force of a polyethylene outer sheath layer and a polyurethane foam layer by spraying or shower-coating the surface of the polyurethane foam with the powder before the polyurethane foam is cured, so that the shearing strength of the polyethylene outer sheath layer / polyurethane foam layer is greater than 0.2 MPa, and the requirement of the standard GB / T34611 for the tangential shearing strength is met.

Description

technical field [0001] The invention belongs to the field of hot-melt adhesive powder for polyethylene / polyurethane foam bonding, and specifically relates to a hot-melt adhesive powder for improving the adhesive force of a polyethylene outer sheath / polyurethane foam layer of a spray-coated winding insulation pipe and its preparation method and application . Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Polyurethane sprayed polyethylene winding prefabricated direct buried insulation pipe (referred to as sprayed winding insulation pipe) is composed of working steel pipe, sprayed polyurethane insulation layer and extruded polyethylene outer sheath. The spray-wound insulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/06C09J123/06C09J123/08C09J11/04C09J11/06B32B1/08B32B15/18B32B15/095B32B27/40B32B27/32B32B27/08B32B7/12
CPCC09J151/06C09J123/06C09J11/04C09J11/06B32B1/08B32B15/18B32B15/046B32B5/20B32B27/32B32B27/065B32B7/12C08L2205/02C08L2205/03C08L2203/18B32B2266/0278B32B2597/00C08K5/1345C08K5/526C08L51/06C08K3/04C08L23/06C08L23/0853C08L23/0869C08K3/34
Inventor 伍金奎倪奉尧孔智勇刘智博孔涛孙之状魏鹏魏健
Owner SHANDONG DONGHONG PIPE IND
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