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

A technology of polyurethane foam and polyethylene, which is applied in the direction of application, chemical instruments and methods, and grafted polymer adhesives, can solve the problems of poor adhesion of polyurethane foam layers, achieve good thermal insulation effects, reduce costs, and improve The effect of adhesion

Active Publication Date: 2022-07-26
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, preparation method and application

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preparation example Construction

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

[0036] S1 Blending and granulation: After the polar monomer-modified polyethylene, polyethylene, ethylene-vinyl acetate copolymer, and functional additives are mixed uniformly in proportion, the blend is extruded by a twin-screw extruder. 180℃-250℃ for granulation, after dicing and drying;

[0037] S2 pulverizing: the blended and granulated materials in S1 are pulverized with a plastic pulverizer, and the particle size of the powder is controlled to be 10 meshes to 200 meshes.

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

[0039] In a specific embodiment, the application method is: before the polyur...

Embodiment 1

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

[0043] Maleic anhydride grafted high-density polyethylene (maleic anhydride grafting rate of 0.8%) 99.5%;

[0044] Antioxidant B215 0.5%.

[0045] The specific steps for preparing the hot melt adhesive powder for polyethylene / polyurethane foam bonding are as follows:

[0046] S1 blending and granulation: after the high-density polyethylene grafted with maleic anhydride and antioxidant B215 are mixed uniformly, the blend is granulated at 190℃-210℃ with a twin-screw extruder, and the pellets are dried for later use. ;

[0047] S2 pulverizing: the blended and granulated materials in S1 are pulverized with a plastic pulverizer, and the particle size of the powder is controlled to be 30 meshes.

[0048] The application of hot melt adhesive powder for polyethylene / polyurethane foam bonding in spraying and winding insulation pipe:

[0049] Select dn508 steel pipe, after...

Embodiment 2

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

[0052] Acrylic acid grafted high density polyethylene (the graft ratio of acrylic acid is 2.5%) 30%;

[0053] PE 80 grade 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 preparing the hot melt adhesive powder for polyethylene / polyurethane foam bonding are as follows:

[0057] S1 blending and granulation: After acrylic grafted HDPE, PE 80 grade pipe material, carbon black masterbatch, and antioxidant 1010 are mixed uniformly, the blend is heated at 210℃-220℃ with a twin-screw extruder. granulation, dicing and drying for later use;

[0058] S2 pulverizing: the blended and granulated materials in S1 are pulverized with a plastic pulverizer, and the particle size of the powder is controlled to be 50 meshes.

[0059] The application of hot melt adhesive p...

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Abstract

The invention discloses a hot-melt adhesive powder for polyethylene / polyurethane foam and a preparation method and application thereof. The powder is calculated by weight percentage: polyethylene modified by polar monomers 30%-99.5%, polyethylene 0-65%, ethylene-vinyl acetate copolymer 0-30%, functional additives 0.5%-5%; adopt twin-screw extrusion process to extrude, blend and granulate, and obtain hot melt adhesive by mechanical grinding powder. The powder has good processability and excellent adhesion to polyethylene / polyurethane foam. It is used in spraying and winding thermal insulation pipes. Before the polyurethane foam is cured, the powder is sprayed or sprayed on the surface of the polyurethane foam, which can improve the performance. The interlayer bonding force between the polyethylene outer sheath and the polyurethane foam layer makes the shear strength of the polyethylene outer sheath / polyurethane foam layer greater than 0.2MPa, which meets the requirements of the standard GB / T34611 for tangential shear strength.

Description

technical field [0001] The invention belongs to the field of hot-melt adhesive powder for polyethylene / polyurethane foam bonding, and in particular relates to a hot-melt adhesive powder for improving the bonding force of a polyethylene outer sheath / polyurethane foam layer of a spray-wound thermal insulation pipe, and a preparation method and application thereof . Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] Polyurethane sprayed polyethylene winding prefabricated direct buried thermal insulation pipe (referred to as sprayed winding thermal insulation pipe) is composed of working steel pipe, sprayed polyurethane thermal insulation layer and extruded polyethylene outer s...

Claims

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Application Information

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Patent Type & Authority Patents(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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