Hot melt adhesive used for steel reinforced spirally wound drainage pipe and preparation method of hot melt adhesive

A technology of hot-melt adhesives and drainage pipes, applied in the direction of adhesives, grafted polymer adhesives, adhesive types, etc., can solve the problem of increasing the construction and installation cost of plastic-steel winding drainage pipes, the impact of lightweight plastic-steel winding drainage pipes, and increasing Problems such as the specific gravity of hot melt adhesives, to achieve the effect of enhancing mechanical strength, small joint range, and reducing self-weight

Active Publication Date: 2019-04-12
河北金天塑胶新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while the filler improves the comprehensive mechanical strength of the hot-melt adhesive, it will increase the specific gravity of the hot-melt adhesive, which will affect the lightweight of the plastic-steel winding drainage pipe, thereby causing inconvenience to the construction project and increasing the construction and installation cost of the plastic-steel winding drainage pipe

Method used

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  • Hot melt adhesive used for steel reinforced spirally wound drainage pipe and preparation method of hot melt adhesive
  • Hot melt adhesive used for steel reinforced spirally wound drainage pipe and preparation method of hot melt adhesive
  • Hot melt adhesive used for steel reinforced spirally wound drainage pipe and preparation method of hot melt adhesive

Examples

Experimental program
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Effect test

preparation example 1-7

[0037] According to the weight parts in the following table 1, add initiator and unsaturated polar monomer to the base resin, at the temperature of 150°C, 155°C, 158°C, 160°C, 165°C, 170°C and 167°C The adhesive resin masterbatches of Preparation Examples 1-7 were respectively obtained by parallel twin-screw extrusion well known in the art.

[0038] Composition and content of bonding resin masterbatch in table 1 preparation example 1-7

[0039]

Embodiment 1-7

[0041] The adhesive resin masterbatches of Preparation Examples 1-7 were used as the adhesive resin masterbatches in the raw materials for preparing hot-melt adhesives in Examples 1-7 respectively, and according to the raw material content in Table 2, hot-melt adhesives were prepared through the following steps: glue:

[0042] (1) Mix and stir the adhesive resin masterbatch with polyolefin resin, ethylene-octene copolymer, EPDM rubber, polyisobutylene, antioxidant and stabilizer evenly, carry out twin-screw extrusion, and heat in the barrel The temperature is 165°C, the die temperature is 190°C, the screw speed is 40rmp, and the feeding speed is 40rmp, twin-screw extrusion to obtain high-temperature block A;

[0043] (2) Feed the high-temperature block A directly into the single-screw extruder, and at the barrel heating temperature of 160°C, the die temperature of 160°C, and the screw speed of 40rmp, add an inorganic foaming agent at the feeding port, Add hollow glass microsp...

Embodiment 8

[0048] The composition and content of each raw material of embodiment 8 and embodiment 4 are all the same, and the difference is that in step (1), at barrel heating temperature 150°C, die temperature 150°C, screw speed 50rmp, feed speed 50rmp, twin-screw Extrude to obtain high-temperature block A; in step (3), pelletize the obtained pellets and pass through an 80-mesh sieve.

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Abstract

The invention relates to a hot melt adhesive used for steel reinforced spirally wound drainage pipes. The hot melt adhesive comprises the following raw materials, in parts by weight: bonding resin masterbatch, polyolefin resin, an ethylene-octene copolymer, ethylene-propylene-diene monomer, polyisobutylene, an antioxidant, a stabilizing agent, hollow glass microbeads and an inorganic foaming agent, wherein the polyisobutene has a number average molecular weight of 200-10000; the stabilizing agent is a calcium-zinc composite stabilizing agent; the bonding resin masterbatch is prepared by the following steps: polyethylene and / or an ethylene copolymer is used as matrix resin, an initiator and an unsaturated polar monomer are added, and melt extrusion is performed to obtain the bonding resin masterbatch; and a total weight of the polyisobutylene, the hollow glass microbeads and the inorganic foaming agent is 5-10% of a total weight of the raw materials of the hot melt adhesive. A lightweight effect is achieved while the comprehensive mechanical properties of the hot melt adhesive are improved. The invention also discloses a preparation method of the hot melt adhesive, and the hot meltadhesive is obtained by performing processing by utilizing a twin-screw machine and performing processing by utilizing a single-screw machine.

Description

technical field [0001] The invention relates to the technical field of polymer adhesives, in particular to a hot melt adhesive used for plastic-steel winding drainage pipes and a preparation method thereof. Background technique [0002] Plastic-steel winding pipe is made of steel-plastic composite special-shaped strip by spiral winding and welding. Its inner wall is smooth and flat. The pipe has the advantages of corrosion resistance, light weight, easy installation, large flow rate, and long life. The pipe is an environmentally friendly green product. Due to its high stiffness-to-weight ratio, plastic-steel coiled tubing weighs less than any type of pure plastic tubing with the same ring stiffness. Since the elastic modulus ratio of steel and plastic materials is greater than 200 and the weight ratio is greater than 7.85, compared with pure plastic pipes, steel belt reinforcement can easily make pipes (especially large-diameter pipes) have sufficient safe and reliable ring...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J151/04C09J123/06C09J11/06C09J11/08C09J11/04
CPCC08K2003/265C08L2205/035C09J11/04C09J11/06C09J11/08C09J123/06C09J151/04C08L23/06C08L23/0853C08K5/18C08K7/28C08K3/26C08K13/04C08L23/0815
Inventor 赵兰敏周旺郑金豹郝丽群
Owner 河北金天塑胶新材料有限公司
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