CN112538325B - Hot melt adhesive powder for polyethylene/polyurethane foam adhesion, preparation method and application - Google Patents

Hot melt adhesive powder for polyethylene/polyurethane foam adhesion, preparation method and application Download PDF

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Publication number
CN112538325B
CN112538325B CN202011421267.XA CN202011421267A CN112538325B CN 112538325 B CN112538325 B CN 112538325B CN 202011421267 A CN202011421267 A CN 202011421267A CN 112538325 B CN112538325 B CN 112538325B
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polyethylene
polyurethane foam
hot melt
melt adhesive
ethylene
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CN112538325A (en
Inventor
伍金奎
倪奉尧
孔智勇
刘智博
孔涛
孙之状
魏鹏
魏健
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Shandong Donghong Pipe Industry Co Ltd
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Shandong Donghong Pipe Industry Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J151/06—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a general shape other than plane
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/065—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • B32B5/20—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material foamed in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0278—Polyurethane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

The invention discloses hot melt adhesive powder for polyethylene/polyurethane foam, a preparation method and application thereof, wherein the powder comprises the following components 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 auxiliary agent; and extruding, blending and granulating by adopting a double-screw extrusion process, and mechanically grinding to obtain hot melt adhesive powder. The powder has good processability and excellent adhesive force to polyethylene/polyurethane foam, and can be sprayed or drenched on the surface of polyurethane foam before the polyurethane foam is cured in the application of spraying and winding a heat-insulating pipe, so that the interlayer bonding force of the polyethylene outer protective layer/the polyurethane foam layer can be improved, the shear strength of the polyethylene outer protective layer/the polyurethane foam layer is larger than 0.2MPa, and the requirement of the standard GB/T34611 on the tangential shear strength is met.

Description

Hot melt adhesive powder for polyethylene/polyurethane foam adhesion, preparation method and application
Technical Field
The invention belongs to the field of hot melt adhesive powder for polyethylene/polyurethane foam bonding, and particularly relates to hot melt adhesive powder for improving the bonding force of a polyethylene outer protective layer/polyurethane foam layer of a sprayed and wound thermal insulation pipe, and a preparation method and application thereof.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The polyurethane spraying polyethylene winding prefabricated direct-buried heat preservation pipe (spraying winding heat preservation pipe for short) is composed of a working steel pipe, a spraying polyurethane heat preservation layer and an extruded polyethylene outer protection layer. The spraying and winding heat preservation pipe adopts the process of firstly spraying the polyurethane layer and then laterally winding the polyethylene outer protective layer, the uniformity of the foam holes of the polyurethane foam is good, the closed porosity is high, the heat released by the foaming can be quickly dissipated, and the foam core burning phenomenon can not occur, so the heat preservation effect is better; and a constraint foaming process is adopted in a common pouring type 'two-step' heat-insulating pipe, so that the internal heat cannot be dissipated, and the phenomena of foam burning and non-uniformity of foam holes occur. The outer protective layer of the spraying and winding heat preservation pipe adopts a lateral winding process, so that the problem that the outer protective layer is easy to crack is solved: the common casting type 'two-step method' heat preservation pipe adopts a 'pipe-in-pipe' sleeve production process, when casting foaming is carried out, the outer protective sleeve bears large internal pressure caused by polyurethane expansion, and in the outer protective sleeve extrusion molding process, stress concentration is carried out at a confluence joint, so that an outer protective layer is easy to crack.
However, the spraying winding thermal insulation pipe has the defect of poor bonding effect of the polyethylene outer protective layer/the polyurethane foam layer, mainly because the polyethylene is a non-polar material and the polyurethane foam is a polar material, the polarity of the polyethylene outer protective layer/the polyurethane foam layer is greatly different. The utility model discloses a patent CN203093054U discloses that polyurethane foam surface winding one deck corona treatment's after the curing membrane improves the adhesion force of polyethylene outer jacket and polyurethane foam, nevertheless there is winding corona treatment membrane to waste time and energy in the actual production process, and twine the polyethylene outer jacket behind the winding corona treatment membrane and arouse outer tympanic bulla easily, the planarization extreme poor problem, this is because the corona membrane cladding is on polyurethane foam's surface, the thermal action of winding polyethylene outer jacket makes the gas in the polyurethane foam toward the outdiffusion, the corona membrane cladding is on polyurethane foam's surface, lead to gaseous unable overflow, therefore form the swell under the outer sheath. Patent No. CN 111070744 a discloses a method for improving the adhesion of polyethylene outer sheath/polyurethane foam, the polyurethane is sprayed in the process of the rotation and the advance of the steel pipe, an automatic funnel device is arranged above the spraying room, when the steel pipe advances, the automatic funnel device starts to spray high-density polyethylene powder downwards, the modified high-molecular powder uniformly falls on the surface of the polyurethane layer which is sprayed, initiated and cured, when the sprayed semi-finished product is conveyed to the front of an extruder head through a trolley, an organic self-adhesive film is wound on the surface of the cured polyurethane layer in advance, the adhesion between the cured polyurethane layer and the polyethylene outer protective layer is improved, the method increases the surface roughness by spraying polyethylene powder and winds the organic self-adhesive film, and also has the defects of complex working procedures and high cost.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide hot melt adhesive powder for polyethylene/polyurethane foam adhesion and a preparation method and application thereof, and solves the problem of poor adhesion of a polyethylene outer protective layer/polyurethane foam layer of a sprayed and wound heat preservation pipe in the prior art.
The purpose of the invention is realized by the following technical scheme:
in a first aspect of the present invention, there is provided a hot melt adhesive powder for polyethylene/polyurethane foam adhesion, which comprises the following components in parts by weight: 30% -99.5% of polar monomer modified polyethylene; 0-65% of polyethylene; 0-30% of ethylene-vinyl acetate copolymer; 0.5 to 5 percent of functional additive.
The polar monomer modified polyethylene is selected from: at least one of maleic anhydride grafted polyethylene, acrylic acid grafted polyethylene, glycidyl methacrylate grafted polyethylene, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate-glycidyl methacrylate terpolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate-maleic anhydride terpolymer, ethylene-ethyl acrylate-maleic anhydride terpolymer and ethylene-butyl acrylate-maleic anhydride terpolymer;
the polyethylene is at least one of high density polyethylene, low density polyethylene and linear low density polyethylene;
the vinyl acetate content of the ethylene-vinyl acetate copolymer is 3% -33%;
the functional auxiliary agent is at least one of an antioxidant, a light stabilizer, a pigment, a color master batch, an auxiliary agent for improving the milling effect and a filler.
In a second aspect of the present invention, there is provided a method for preparing the hot melt adhesive powder for polyethylene/polyurethane foam adhesion, comprising the following steps:
s1 blending and granulating: uniformly mixing polar monomer modified polyethylene, ethylene-vinyl acetate copolymer and functional auxiliary agent in proportion, granulating the blend at 180-250 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the S1 by using a plastic grinding machine, wherein the particle size of the powder is controlled to be 10-200 meshes.
In a third aspect of the present invention, there is provided a use of the above hot melt adhesive powder for polyethylene/polyurethane foam adhesion in spraying and winding a thermal insulation pipe;
the application method comprises the following steps: before the polyurethane foam is cured, the powder is sprayed or sprayed on the surface of the polyurethane foam to improve the interlayer bonding force of the polyethylene outer protective layer/the polyurethane foam layer, and the shear strength of the polyethylene outer protective layer/the polyurethane foam is more than 0.2 MPa.
One or more embodiments of the present invention have the following advantageous effects:
the interlayer binding force between the polyethylene outer protective layer of the spraying winding thermal insulation pipe and the polyurethane foam is improved. The modified polyethylene powder which can react with isocyanate groups in the foaming process is utilized, and the isocyanate groups can rapidly and chemically react with carboxyl groups and epoxy groups in the modified hot melt adhesive powder under the action of high temperature of 80-100 ℃ generated on the surface of foam in the foaming process, so that the bonding force between polyurethane foam and the hot melt adhesive powder is improved; the hot melt adhesive powder and the polyethylene outer protective layer are both made of polyethylene, so that the hot melt adhesive powder can be physically compatible with the polyethylene outer layer when the molten outer protective layer is wound;
the hot melt adhesive powder is applied to spraying and winding the thermal insulation pipe, the problem of poor appearance of the thermal insulation pipe caused by bubbling of the outer protective layer due to winding of a polarizing film in the prior art can be solved, after the powder is sprayed on the surface of polyurethane foam, the roughness of the surface is increased, the adhesion force between the polyethylene outer protective layer and the polyurethane foam can be improved, unreacted volatile substances in the polyurethane foam can be diffused outwards due to the heat radiation of the outer protective layer, and therefore, the appearance of the spraying and winding thermal insulation pipe is smooth, the working steel pipe, the polyurethane foam and the polyethylene outer protective layer are organically combined into a whole, the thermal insulation effect is better, and the service life is longer;
the hot melt adhesive powder is applied to spraying and winding the thermal insulation pipe, so that the cost of spraying and winding the thermal insulation pipe can be reduced; the corona polarization film or the organic self-adhesive film is added corresponding to the prior art, the using amount of the hot melt adhesive powder is 20-100 g/square meter of polyurethane foam surface, and the spraying of the hot melt adhesive powder is carried out in the foaming process, so that the polarization film or the organic self-adhesive film does not need to be wound in extra time, the labor and the materials are saved, and the cost for winding and spraying the thermal insulation pipe can be reduced.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In one embodiment of the present invention, there is provided a hot melt adhesive powder for polyethylene/polyurethane foam adhesion, comprising the following components in parts by weight: 30% -99.5% of polar monomer modified polyethylene; 0-65% of polyethylene; 0-30% of ethylene-vinyl acetate copolymer; 0.5 to 5 percent of functional additive.
Research shows that the poor bonding effect of the two layers of the polyethylene outer protective layer and the polyurethane foam layer in the spray-wound polyurethane thermal insulation pipe is mainly caused by the large polarity difference between the polyethylene and the polyurethane. In order to solve the problem, the characteristic that the black material polyisocyanate has very high reaction activity in the polyurethane spraying and foaming process is utilized, before the polyurethane is foamed and cured, the surface of the polyurethane foam is sprinkled with modified polyethylene which can react with isocyanate groups and has good compatibility with outer-layer polyethylene, such as carboxyl and epoxy groups in maleic anhydride modified polyethylene, acrylic acid modified polyethylene and glycidyl methacrylate modified polyethylene, can react with isocyanate, and the isocyanate groups can rapidly react with the carboxyl and epoxy groups in the modified hot melt adhesive powder under the action of high temperature of 80-100 ℃ generated on the surface of foam in the foaming process, thereby improve the adhesive force between with polyurethane foam, simultaneously, spray hot melt adhesive powder, increased polyurethane foam surface area, form good physics bonding when being favorable to hot winding polyethylene outer jacket.
Preferably, the polar monomer-modified polyethylene is selected from: at least one of maleic anhydride grafted polyethylene, acrylic acid grafted polyethylene, glycidyl methacrylate grafted polyethylene, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate-glycidyl methacrylate terpolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate-maleic anhydride terpolymer, ethylene-ethyl acrylate-maleic anhydride terpolymer and ethylene-butyl acrylate-maleic anhydride terpolymer;
more preferably at least one selected from the group consisting of maleic anhydride grafted polyethylene, acrylic acid grafted polyethylene, glycidyl methacrylate grafted polyethylene, and ethylene-methyl acrylate-glycidyl methacrylate terpolymer;
preferably, the polyethylene is at least one of high density polyethylene, low density polyethylene and linear low density polyethylene;
preferably, the vinyl acetate content of the ethylene-vinyl acetate copolymer is 3% -33%;
preferably, the functional auxiliary agent is at least one of an antioxidant, a light stabilizer, a pigment, a color master batch, an auxiliary agent for improving the milling effect and a filler.
In a specific embodiment, the functional aid is an antioxidant;
in a specific embodiment, the functional auxiliary agent is an antioxidant and carbon black master batch;
in a specific embodiment, the functional auxiliary agent is an antioxidant and phthalocyanine blue;
in a specific embodiment, the functional additives are an antioxidant and talc.
After the hot melt adhesive powder in the embodiment of the invention is sprayed on the surface of polyurethane foam, the roughness of the polyurethane surface is increased, the roughness of the surface not only can improve the adhesive force between the polyethylene outer protective layer and the polyurethane foam, but also is beneficial to causing unreacted volatile substances in the polyurethane foam to diffuse outwards due to the heat radiation of the outer protective layer, so that the appearance of the spraying and winding heat preservation pipe is smooth, the working steel pipe, the polyurethane foam and the polyethylene outer protective layer are organically combined into a whole, and the heat preservation effect is better, and the service life is longer.
In one embodiment of the present invention, a method for preparing the hot melt adhesive powder for polyethylene/polyurethane foam adhesion is provided, which comprises the following specific steps:
s1 blending and granulating: uniformly mixing polar monomer modified polyethylene, ethylene-vinyl acetate copolymer and functional auxiliary agent in proportion, granulating the blend at 180-250 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the step S1 by using a plastic mill, and controlling the particle size of the powder to be 10-200 meshes.
In one embodiment of the present invention, there is provided an application of the above hot melt adhesive powder for polyethylene/polyurethane foam adhesion in spraying and winding a thermal insulation pipe;
in a specific embodiment, the method for applying is as follows: before the polyurethane foam is cured, the powder is sprayed or sprayed on the surface of the polyurethane foam to improve the interlayer bonding force of the polyethylene outer protective layer/the polyurethane foam layer, and the shear strength of the polyethylene outer protective layer/the polyurethane foam is more than 0.2 MPa.
The present invention will be further described with reference to the following examples.
Example 1
The hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following raw materials in parts by weight:
99.5% of maleic anhydride grafted high density polyethylene (the grafting ratio of maleic anhydride is 0.8%);
and (4) antioxidant B2150.5%.
The preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following specific steps:
s1 blending and granulating: uniformly mixing maleic anhydride grafted high-density polyethylene and an antioxidant B215, granulating the blend at 190-210 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the S1 by using a plastic grinding machine, wherein the particle size of the powder is controlled to be 30 meshes.
The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding on the spraying winding heat preservation pipe comprises the following steps:
selecting a dn508 steel pipe, performing shot blasting on the surface of the steel pipe, fixing the steel pipe on a workbench, spraying and foaming, controlling the thickness of foam to be 50mm and the density of the foam to be 65kg/m 3 After the spraying and foaming process is finished and before the foam is not cured, the surface of the foam is sieved by a vibrating screen according to the ratio of 20g/m 2 、60g/m 2 、100g/m 2 The hot melt adhesive powder of S2 was uniformly sprayed on the surface of polyurethane foam, and after curing, a polyethylene outer sheath having a thickness of 5mm was wound on the surface of the foam. The polyethylene outer sheath and the foam were tested for tangential shear strength according to GB/T29046 and the relevant data are shown in Table 1.
Example 2
The hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following raw materials in parts by weight:
30% of acrylic acid grafted high-density polyethylene (the grafting rate of acrylic acid is 2.5%);
PE 80 grade pipe stock (DGDB 2480) 65%;
4.5 percent of carbon black master batch (the carbon black content is 45 percent);
10100.5% of antioxidant.
The preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following specific steps:
s1 blending and granulating: uniformly mixing acrylic acid grafted high-density polyethylene, PE 80-grade pipeline material, carbon black master batch and antioxidant 1010, granulating the blend at 210-220 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the step S1 by using a plastic grinding mill, wherein the particle size of the powder is controlled to be 50 meshes.
The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding on the spraying winding heat preservation pipe comprises the following steps:
selecting a dn508 steel pipe, performing shot blasting on the surface of the steel pipe, fixing the steel pipe on a workbench, spraying and foaming, controlling the thickness of foam to be 50mm and the density of the foam to be 65kg/m 3 In aAfter the spraying and foaming process is finished and before the foam is not cured, the surface of the foam is sieved by a vibrating screen according to the ratio of 20g/m 2 、60g/m 2 、100g/m 2 The hot melt adhesive powder of S2 was uniformly sprayed on the surface of polyurethane foam, and after curing, a polyethylene outer sheath having a thickness of 5mm was wound on the surface of the foam. The polyethylene outer sheath and the foam were tested for tangential shear strength according to GB/T29046 and the relevant data are shown in Table 1.
Example 3
The hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following raw materials in parts by weight:
50% of polyethylene grafted by glycidyl methacrylate (the grafting rate of the glycidyl methacrylate is 2.5%);
PE 80 grade pipe material (DGDB 2480) 20%;
ethylene-vinyl acetate copolymer (EVA 18-3) 28.5%
1% of phthalocyanine blue;
2450.5% of antioxidant.
The preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following specific steps:
s1 blending and granulating: uniformly mixing acrylic acid grafted high-density polyethylene, PE 80-grade pipeline material, carbon black master batch and antioxidant 1010, granulating the blend at 195-210 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the step S1 by using a plastic grinding mill, wherein the particle size of the powder is controlled to be 50 meshes.
The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding on the spraying winding heat preservation pipe comprises the following steps:
selecting a dn508 steel pipe, fixing the steel pipe on a workbench after performing shot blasting rust removal on the surface, spraying and foaming, controlling the thickness of foam to be 50mm, and controlling the density of the foam to be 65kg/m 3 After the spraying foaming process is finished and before the foam is not cured, the surface of the foam is sieved by a vibrating screen according to the ratio of 20g/m 2 、60g/m 2 、100g/m 2 The hot melt adhesive powder of S2 is uniformly sprayed on the surface of polyurethane foam, and is curedAnd a polyethylene outer protective layer with the thickness of 5mm is wound on the surface of the foam. The polyethylene outer sheath and the foam were tested for tangential shear strength according to GB/T29046 and the relevant data are shown in Table 1.
Example 4
The hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following raw materials in parts by weight:
30% of ethylene-methyl acrylate-maleic anhydride terpolymer (the content of maleic anhydride is 3.1%);
PE 80 grade pipe material (DGDB 2480) 55%;
ethylene-vinyl acetate copolymer (EVA 18-3) 10%
4.5 percent of talcum powder;
2450.5% of antioxidant.
The preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following specific steps:
s1 blending and granulating: uniformly mixing acrylic acid grafted high-density polyethylene, PE 80-grade pipeline material, carbon black master batch and antioxidant 1010, granulating the blend at 230-240 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (4) grinding the blended and granulated material in the S1 by using a plastic grinding machine, wherein the particle size of the powder is controlled to be 50 meshes.
The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding on the spraying winding heat preservation pipe comprises the following steps:
selecting a dn508 steel pipe, performing shot blasting on the surface of the steel pipe, fixing the steel pipe on a workbench, spraying and foaming, controlling the thickness of foam to be 50mm and the density of the foam to be 65kg/m 3 After the spraying foaming process is finished and before the foam is not cured, the surface of the foam is sieved by a vibrating screen according to the ratio of 20g/m 2 、60g/m2、100g/m 2 The hot melt adhesive powder of S2 was uniformly sprayed on the surface of polyurethane foam, and after curing, a polyethylene outer sheath having a thickness of 5mm was wound on the surface of the foam. The polyethylene outer sheath and foam were tested for tangential shear strength according to GB/T29046, and the data is shown in Table 1.
Comparative example 1
Selecting a dn508 steel pipe, performing shot blasting on the surface of the steel pipe, fixing the steel pipe on a workbench, spraying and foaming, controlling the thickness of foam to be 50mm and the density of the foam to be 65kg/m 3 And winding a polyethylene outer protective layer with the thickness of 5mm on the surface of the foam after curing. The polyethylene outer sheath and foam were tested for tangential shear strength according to GB/T29046, and the data is shown in Table 1.
Comparative example 2
The hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following raw materials in parts by weight:
95% of PE 80 grade pipeline material (DGDB 2480);
4.5 percent of carbon black master batch (the carbon black content is 45 percent);
10100.5% of antioxidant.
The preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following specific steps:
s1 blending and granulating: uniformly mixing acrylic acid grafted high-density polyethylene, PE 80-grade pipeline material, carbon black master batch and antioxidant 1010, granulating the blend at 210-220 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: and (3) grinding the blended and granulated material in the step S1 by using a plastic grinding mill, wherein the particle size of the powder is controlled to be 50 meshes.
The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding on the spraying winding heat preservation pipe comprises the following steps:
selecting a dn508 steel pipe, performing shot blasting on the surface of the steel pipe, fixing the steel pipe on a workbench, spraying and foaming, controlling the thickness of foam to be 50mm and the density of the foam to be 65kg/m 3 After the spraying and foaming process is finished and before the foam is not cured, the surface of the foam is sieved by a vibrating screen according to the ratio of 20g/m 2 、60g/m 2 、100g/m 2 The hot melt adhesive powder of S2 was uniformly sprayed on the surface of polyurethane foam, and after curing, a polyethylene outer sheath having a thickness of 5mm was wound on the surface of the foam. The polyethylene outer sheath and foam were tested for tangential shear strength according to GB/T29046, and the data is shown in Table 1.
TABLE 1 polyethylene outer sheath/polyurethane foam shear strength data
Figure BDA0002822468270000081
As can be seen from the comparison between example 1 and comparative example 1, the hot melt adhesive powder of the present invention is not sprayed between the polyethylene outer sheath sprayed and wound on the thermal insulation pipe and the polyurethane foam, and the strength between the polyethylene outer sheath sprayed and wound on the thermal insulation pipe and the polyurethane foam is extremely low, which does not meet the requirement of more than 0.2MPa required by the standard GB/T29046;
as can be seen from the comparison between the example 2 and the comparative example 2, when polyethylene which has the same content and does not contain the polar monomer modification in the invention is sprayed, the strength between the polyethylene outer protective layer of the spray-wound thermal insulation pipe of the comparative example 2 and polyurethane foam is extremely low, and the requirement of more than 0.2MPa required by the standard GB/T29046 can not be met;
it can be seen from examples 1-4 that when the hot melt adhesive powder of the present invention is sprayed between the polyethylene outer sheath and the polyurethane foam, the shear strength between the polyethylene outer sheath and the polyurethane foam increases with the increase of the amount of the hot melt adhesive powder, and the failure mode gradually changes from the adhesion of a small amount of foam on the surface of the polyethylene to the pulling apart of the foam layer.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. The application of the hot melt adhesive powder for polyethylene/polyurethane foam bonding in spraying and winding of the thermal insulation pipe is characterized in that the hot melt adhesive powder for polyethylene/polyurethane foam bonding comprises the following components in parts by weight:
30% -99.5% of polar monomer modified polyethylene;
0-65% of polyethylene;
0-30% of ethylene-vinyl acetate copolymer;
0.5 to 5 percent of functional auxiliary agent;
wherein the polar monomer modified polyethylene is: at least one of maleic anhydride grafted polyethylene, acrylic acid grafted polyethylene, glycidyl methacrylate grafted polyethylene, ethylene-methyl acrylate-glycidyl methacrylate terpolymer, ethylene-butyl acrylate-glycidyl methacrylate terpolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate-maleic anhydride terpolymer, ethylene-ethyl acrylate-maleic anhydride terpolymer and ethylene-butyl acrylate-maleic anhydride terpolymer;
the preparation method of the hot melt adhesive powder for polyethylene/polyurethane foam adhesion comprises the following specific steps:
s1 blending and granulating: uniformly mixing polar monomer modified polyethylene, ethylene-vinyl acetate copolymer and functional auxiliary agent according to the weight ratio, granulating the blend at 180-250 ℃ by using a double-screw extruder, and granulating and drying for later use;
s2 grinding: grinding the blended and granulated material in the S1 by using a plastic grinding machine, and controlling the particle size of the powder to be 10-200 meshes;
the application method comprises the following steps: before the polyurethane foam is cured, hot melt adhesive powder for bonding polyethylene/polyurethane foam is sprayed or sprayed on the surface of the polyurethane foam to improve the interlayer bonding force of the polyethylene outer protective layer/the polyurethane foam layer, and the shear strength of the polyethylene outer protective layer/the polyurethane foam is more than 0.2 MPa.
2. The use of hot melt adhesive powder for polyethylene/polyurethane foam bonding in spray-wound thermal insulation pipes according to claim 1, wherein the polyethylene is at least one of high density polyethylene, low density polyethylene, and linear low density polyethylene.
3. The use of a hot melt adhesive powder for polyethylene/polyurethane foam bonding in spray-wound thermal insulation pipes according to claim 1, wherein the ethylene-vinyl acetate copolymer has a vinyl acetate content of 3% to 33%.
4. The use of the hot melt adhesive powder for polyethylene/polyurethane foam bonding in spray-coating and winding thermal insulation pipes according to claim 1, wherein the functional auxiliary agent is at least one of an antioxidant, a light stabilizer, a pigment, a color masterbatch and a filler.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109401031A (en) * 2018-09-30 2019-03-01 金旸（厦门）新材料科技有限公司 A kind of rotational moulding PP Pipe Compound and preparation method thereof that can improve bond strength between polyurethane foaming layer and product
CN109732957A (en) * 2019-01-31 2019-05-10 宝鸡石油钢管有限责任公司 The novel prefabricated direct-buried polyurethane coating insulating tube production line of one kind and production technology
CN110901116A (en) * 2019-12-11 2020-03-24 天津市宇刚保温建材有限公司 Production process of prefabricated directly-buried heat-insulating pipe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402834B (en) * 2008-11-18 2011-04-13 广州鹿山新材料股份有限公司 Foamable hot melt adhesive composition and uses thereof
CN102086357B (en) * 2010-12-16 2012-06-20 广州市合诚化学有限公司 Adhesive resin used for steel band reinforced polyethylene spiral corrugated pipe and preparation method thereof
CN105349073A (en) * 2015-12-08 2016-02-24 河北金天塑胶新材料有限公司 Hot melt adhesive used for winding plastic steel around water drain pipe and preparing method thereof
CN109679531B (en) * 2018-12-27 2021-04-20 江苏鸿硕工程塑料科技股份有限公司 PE adhesive for continuous fiber prepreg tape and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109401031A (en) * 2018-09-30 2019-03-01 金旸（厦门）新材料科技有限公司 A kind of rotational moulding PP Pipe Compound and preparation method thereof that can improve bond strength between polyurethane foaming layer and product
CN109732957A (en) * 2019-01-31 2019-05-10 宝鸡石油钢管有限责任公司 The novel prefabricated direct-buried polyurethane coating insulating tube production line of one kind and production technology
CN110901116A (en) * 2019-12-11 2020-03-24 天津市宇刚保温建材有限公司 Production process of prefabricated directly-buried heat-insulating pipe

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