Low-surface roughness propylene random copolymer (PP-R) pipe and preparation method thereof

A PP-R, roughness technology, applied in the direction of pipes, rigid pipes, mechanical equipment, etc., can solve the problems of rough inner wall, affecting water quality and sanitation, poor fluidity, etc., achieve low inner surface roughness, ensure water quality and sanitation, and service life long effect

Inactive Publication Date: 2016-06-22
RIFENG ENTERPRISE FOSHAN CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PP-R melt has high strength and poor fluidity. After extrusion, the inner wall is relatively rough. Long-term use is easy to accumulate scale and microbial growth, which affects water quality and sanitation.

Method used

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  • Low-surface roughness propylene random copolymer (PP-R) pipe and preparation method thereof
  • Low-surface roughness propylene random copolymer (PP-R) pipe and preparation method thereof
  • Low-surface roughness propylene random copolymer (PP-R) pipe and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Prepare a low surface roughness PP-R pipe, pipe specification S3.220*2.8, the PP-R pipe is divided into two layers, from inside to outside: low surface roughness inner layer 20 and PP-R outer layer 10. The thickness of the inner layer is 0.3mm, and the thickness of the outer layer of PP-R is 2.5mm.

[0036] The preparation method is as follows:

[0037] (1) First, mix polypropylene resin PP, polymer compound grease, dimethyl silicone oil and color masterbatch according to the ratio of parts by mass of 100:5:0.5:2, fully stir with a high-speed mixer for 5-10min, and then pass through the twin-screw The extruder is extruded and granulated, and the processing temperature is controlled between 160-200°C to obtain inner layer granules.

[0038] (2) Add 3wt% white masterbatch to the PP-R resin raw material, fully stir with a high-speed mixer for 5-10min, then extrude and granulate through a twin-screw extruder, and control the processing temperature between 170-220°C to obta...

Embodiment 2

[0045] Prepare a low surface roughness PP-R pipe, the pipe specification S3.225*3.5, the PP-R pipe is divided into two layers, from inside to outside: the inner layer with low surface roughness and the outer layer of PP-R, The thickness of the inner layer is 0.5mm, and the thickness of the outer layer of PP-R is 3.0mm.

[0046] The preparation method is as follows:

[0047] (1) First mix polypropylene resin PP, polymer compound grease, dimethyl silicone oil and color masterbatch according to the ratio of parts by mass of 100:6:1:3, fully stir with a high-speed mixer for 5-10min, and then pass through the twin-screw The extruder is extruded and granulated, and the processing temperature is controlled between 160-200°C to obtain inner layer granules.

[0048] (2) Add 3% white masterbatch to the PP-R resin raw material, fully stir with a high-speed mixer for 5-10min, then extrude and granulate through a twin-screw extruder, and control the processing temperature between 170-220°...

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Abstract

The invention discloses a low-surface roughness propylene random copolymer (PP-R) pipe and a preparation method thereof. The PP-R pipe sequentially comprises a low-surface roughness inner layer and a PP-R outer layer from inside to outside, wherein the thickness of the inner layer is 0.1-1.0mm, and the surface roughness Ra is less than or equal to 0.1 micron. The PP-R pipe not only maintains the advantages of being light in weight, good in sanitation, long in service life and the like of the PP-R pipe, but also is low in roughness of the inner surface and enables water scale to be difficult to gather so as to effectively reduce the breeding of microorganisms and guarantee water quality hygiene.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a PP-R pipe with low surface roughness and a preparation method thereof. Background technique [0002] Random copolymerized polypropylene (PP-R) pipe not only has the light weight, non-toxicity, corrosion resistance and high strength of polypropylene pipe, but also has the advantages of long service life, convenient installation, reliable connection and recyclability. A new type of green building energy-saving material, widely used in domestic hot and cold water systems. With the rapid development of my country's economy, the consumption of PP-R pipes has also increased significantly, and the market share has increased rapidly. The Ministry of Construction of my country has made random copolymerized polypropylene (PP-R) for hot and cold water the first of the three major new types of plastic pipes to be promoted, so it has developed rapidly in recent years. In the field o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L67/02C08L83/04F16L9/133B29C47/06
CPCB29C48/18C08L23/12C08L23/14C08L2203/18C08L2205/03F16L9/133C08L67/02C08L83/04
Inventor 王军彭晓翊李白千李超浪
Owner RIFENG ENTERPRISE FOSHAN CO LTD
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