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High-barrier material, plastic pipe with high barrier property and preparation method

A technology of high-barrier materials and raw materials, applied in the field of polymer materials, can solve the problems of easy detachment of adhesives, complicated improvement methods, and poor durability.

Inactive Publication Date: 2020-10-23
赵志勇 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the commonly used method to improve EVOH resin is to add a protective layer on both sides of the EVOH layer, but in essence, the moisture absorption problem of EVOH resin has not been substantially improved. In addition, this improvement method is more complicated and subject to Limited to the shape of the EVOH resin in the product, not only the effect is not outstanding, but the durability is poor. In addition, the adhesive between the protective layer and the EVOH layer is also prone to detachment, and the application cost is increased.

Method used

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  • High-barrier material, plastic pipe with high barrier property and preparation method
  • High-barrier material, plastic pipe with high barrier property and preparation method

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preparation example Construction

[0053] The third aspect of the present invention provides a method for preparing the plastic pipe with high barrier performance, the steps at least include: melt-mixing polyolefin resin, inorganic filler, and silane coupling agent for primary pellets, and Drying; the primary pellets are extruded through the extruder head, shaped, cooled and drawn.

[0054] In some preferred embodiments, the preparation method of the plastic pipe with high barrier performance, the steps include: carrying out melt-mixed primary pellets of polyolefin resin, inorganic filler, silane coupling agent and auxiliary agent, and drying ; The primary pellets are melted and extruded through the extruder head, shaped, cooled and drawn.

Embodiment 1

[0057] A high-barrier material. The raw materials include, by weight, 100 parts of polyolefin resin, 20 parts of inorganic filler, and 2.5 parts of silane coupling agent.

[0058] The raw material also includes an auxiliary agent; the weight ratio between the auxiliary agent and the inorganic filler is 0.5:1.

[0059] The auxiliary agent includes a combination of dispersant, antioxidant and stabilizer; the weight ratio among the dispersant, antioxidant and stabilizer is 1:2.5:1.

[0060] Described dispersant is calcium stearate.

[0061] The antioxidant is dilauryl thiodipropionate.

[0062] The stabilizer is a calcium-zinc composite stabilizer.

[0063] The polyolefin resin includes ethylene-vinyl alcohol copolymer and HDPE; the weight ratio between the ethylene-vinyl alcohol copolymer and HDPE is 1:5.

[0064] The ethylene content in the ethylene-vinyl alcohol copolymer is 38wt%; the melt flow index of the ethylene-vinyl alcohol copolymer at 190°C / 2.16kg is 1.7g / 10min. T...

Embodiment 2

[0074] A high-barrier material. The raw materials include 90 parts of polyolefin resin, 10 parts of inorganic filler and 1 part of silane coupling agent in parts by weight.

[0075] The raw material also includes an auxiliary agent; the weight ratio between the auxiliary agent and the inorganic filler is 0.01:1.

[0076] The auxiliary agent comprises a combination of dispersant, antioxidant and stabilizer; the weight ratio among the dispersant, antioxidant and stabilizer is 0.5:0.5:1.

[0077] Described dispersant is calcium stearate.

[0078] The antioxidant is dilauryl thiodipropionate.

[0079]The stabilizer is a calcium-zinc composite stabilizer.

[0080] The polyolefin resin includes ethylene-vinyl alcohol copolymer and HDPE; the weight ratio between the ethylene-vinyl alcohol copolymer and HDPE is 1:3.

[0081] The ethylene content in the ethylene-vinyl alcohol copolymer is 32wt%; the melt flow index of the ethylene-vinyl alcohol copolymer at 190°C / 2.16kg is 1.8g / 10mi...

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Abstract

The invention relates to the technical field of plastic pipes, and particularly provides a high-barrier material which at least comprises the following raw materials in parts by weight: 80-120 parts of polyolefin resin, 5-30 parts of inorganic filler and 0.1-5 parts of silane coupling agent, wherein the polyolefin resin comprises at least one of an ethylene-vinyl alcohol copolymer, HDPE, PP, PET and PC. The high-barrie material is mainly used for products with barrier property requirements on oxygen molecules, and the material can remarkably reduce the oxygen barrier property of humidity and the stability of pipe strength.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a high-barrier material, a plastic pipe with high barrier performance and a preparation method. Background technique [0002] Oxygen molecules can pass through the plastic pipe wall. When oxygen molecules enter the conveyed medium in the pipe, they will pollute the conveyed medium, encourage the growth of microorganisms in the medium, and accelerate the oxidation and corrosion of metal equipment and metal parts in the pipeline system. It also accelerates the oxidative degradation of the plastic pipe itself, increases the safety hazard of the pipeline system, and shortens the service life of the pipeline system. At present, the plastic pipes with oxygen barrier function in my country include: various metal-plastic composite pipes-lap-welded and butt-welded aluminum-plastic composite pressure pipes, externally melted and internally melted aluminum-plastic composite pressure pipes, ...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K13/04C08K7/00C08K3/32C08K3/34C08K5/5419C08K3/36C08K5/544
CPCC08K2003/325C08L23/06C08L23/0861C08L2201/14C08L2203/18C08L2205/02C08L2207/062C08K13/04C08K7/00C08K3/34C08K3/36C08K3/32C08K5/5419C08K5/544
Inventor 赵志勇刘志光
Owner 赵志勇
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