Double-layer PP-R pipe

A PP-R, pipe technology, applied in the direction of pipes, rigid pipes, pipes/pipe joints/fittings, etc., can solve the problems of algae pollution, easy blockage, short life, etc. The effect of reducing manufacturing cost and usage cost

Inactive Publication Date: 2017-10-24
HUBEI DAYANG PLASTIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a double-layer PP-R pipe to solv

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  • Double-layer PP-R pipe
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[0025] The present invention will be further described in detail below in conjunction with the embodiments in the drawings, but it does not constitute any limitation to the present invention.

[0026] Such as figure 1 with figure 2 As shown, a double-layer PP-R pipe provided by the present invention includes a PP-R UV-resistant outer layer 1 and a PP-R inner layer 2, and the inner and outer layers are co-extruded into an integrated structure.

[0027] The PP-R anti-ultraviolet outer layer 1 is made of PP-R resin 85-96%, light-blocking masterbatch 2-4%, nano-carbon fiber masterbatch 1-5%, and UV absorber 0.5-2 in terms of mass percentage. %, 0.3-4% of antioxidants are mixed, wherein the ultraviolet absorber is ultraviolet absorber UV-531, and the antioxidant is antioxidant 1010.

[0028] Table 1 shows the formulation of the components in the PP-R UV-resistant outer layer.

[0029] Table 1

[0030] Components (Dosage g)

[0031] Among the above components, the light-blocking color m...

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Abstract

The invention discloses a double-layer PP-R pipe, which comprises a PP-R anti-ultraviolet outer layer and a PP-R inner layer, and the inner and outer two layers are co-extruded into an integrated structure; the PP-R anti-ultraviolet outer layer is composed of Prepared with the following components by mass percentage: PP-R resin 85-96%, light-blocking color masterbatch 2-4%, nano-carbon fiber masterbatch 1-5%, ultraviolet absorber 0.5-2%, antioxidant 0.3-0. 4%. The invention has a simple structure. The PP-R inner layer and the PP-R anti-ultraviolet outer layer are compounded to form a double-layer PP-R pipe through co-extrusion. Since the outer layer with an anti-ultraviolet function is used, the outer layer is not connected with the pipeline transportation. The contact between fluids can prevent the hygienic and physical properties of the double-layer PP‑R pipe from being affected, and it can resist ultraviolet rays more effectively to ensure the service life.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, and more specifically relates to a double-layer PP-R pipe. Background technique [0002] Random copolymerized polypropylene (PP-R) pipes have the advantages of energy saving and material saving, environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, easy construction and maintenance, and long service life. They are widely used in building water supply and drainage, urban and rural areas Water supply and drainage, city gas, electric power and optical cable sheathing, industrial fluid transportation, agricultural irrigation and other construction, municipal, industrial and agricultural fields. [0003] However, due to the high isotacticity of the molecular chain of PP-R, the steric hindrance of the side chain methyl group reduces the flexibility of the molecular chain. Therefore, the PP-R material itself has the defect of low tempera...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/06C08K13/04C08K3/22C08K5/5425C08K7/06C08K5/134C08K5/132F16L9/133
CPCC08L23/14C08K2003/2241C08K2201/011C08L2201/08C08L2203/18F16L9/133
Inventor 罗贤想
Owner HUBEI DAYANG PLASTIC CO LTD
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