Unlock instant, AI-driven research and patent intelligence for your innovation.

Impact-resistant PP-R tube and preparation method thereof

A PP-R, impact-resistant technology, applied in the field of impact-resistant PP-R pipes and their preparation, can solve the problems of poor low-temperature toughness, damage, and poor low-temperature impact resistance of PP-R pipes, and achieve perfect crystal morphology , The effect of convenient forming and processing, and improved mechanical properties

Inactive Publication Date: 2015-04-08
LIANSU TECH DEV WUHAN
View PDF9 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the promotion of PP-R pipes in my country is restricted by several factors: (1) The performance of domestic PP-R special resin is not good, and the degree of domestic raw materials is not high
(2) The low temperature toughness of PP-R pipe is poor
Due to poor low temperature impact resistance, PP-R pipes will be embrittled at low temperature under low temperature conditions, so they are easily damaged during transportation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The material of the pipe is composed of the following raw materials in parts by weight:

[0016] PP-R masterbatch 100 parts

[0017] 4 parts of nano calcium carbonate loaded with dibenzylidene sorbitol

[0018] Color masterbatch 3 copies

[0019] The preparation method of the nano-calcium carbonate loaded with dibenzylidene sorbitol on the surface is to grind the dibenzylidene sorbitol and nano-calcium carbonate in a ball mill, and to load the nucleating agent on the surface of the nano-calcium carbonate by physical methods.

[0020] After the above materials are mixed separately, they are extruded through an extrusion die, and then cooled and shaped to obtain PP-R pipes.

[0021] After testing, the damage rate of the prepared PP-R pipe in the Charpy impact test at -5°C is 0, and other properties of the pipe meet the requirements of GB / T 18742.2-2002.

Embodiment 2

[0023] The material of the pipe is composed of the following raw materials in parts by weight:

[0024] PP-R masterbatch 100 parts

[0025] 1 part of nano-talc powder loaded with dibenzylidene sorbitol

[0026] Color masterbatch 2 parts

[0027] The preparation method of the nano-talcum powder loaded with dibenzylidene sorbitol on the surface is to grind the dibenzylidene sorbitol and the nano-talc powder in a ball mill, and load the nucleating agent on the surface of the nano-talc powder by a physical method.

[0028] The preparation method is the same as in Example 1, and the prepared PP-R pipe has no fracture in the drop hammer impact test at 0°C.

Embodiment 3

[0030] The material of the pipe is composed of the following raw materials in parts by weight:

[0031] PP-R masterbatch 100 parts

[0032] 10 parts on the nano wollastonite surface loaded with dibenzylidene sorbitol

[0033] Color masterbatch 2 parts

[0034] The preparation method of the nano wollastonite loaded with dibenzylidene sorbitol on the surface is to grind the dibenzylidene sorbitol and nano wollastonite in a ball mill, and load the nucleating agent on the surface of the nano wollastonite by physical means.

[0035] The preparation method is the same as in Example 1. After testing, the damage rate of the prepared PP-R pipe in the Charpy impact test at -5°C is 0, and other properties of the pipe meet the requirements of GB / T 18742.2-2002.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an impact-resistant PP-R tube, comprising the following components in parts by weight: 100 parts of PP-R master batches and 1-10 parts of nanoparticles loaded with alpha nucleating agents on surfaces. According to the impact resistant PP-R tube provided by the invention, the nanoparticle-loaded alpha nucleating agents are added, so that the PP-R crystal is relatively perfect in shape, relatively small in grain, and convenient to mold and process; and the mechanical property is comprehensively improved.

Description

technical field [0001] The invention relates to the field of polypropylene pipes, in particular to a PP-R pipe with impact resistance and a preparation method thereof. Background technique [0002] PP-R pipes have the advantages of heat preservation, energy saving, environmental protection, excellent heat resistance, oxygen stability and hygienic performance. Compared with other hot and cold water pipes, PP-R pipes are moderately priced and cost-effective, and are suitable for domestic market demand. [0003] At present, the promotion of PP-R pipes in my country is restricted by several factors: (1) The performance of domestic PP-R special resin is not good, and the degree of domestic raw materials is not high. (2) The low temperature toughness of PP-R pipe is poor. Due to poor low temperature impact resistance, PP-R pipes will be embrittled at low temperature under low temperature conditions, so they are easily damaged during transportation. Contents of the invention ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/14C08K13/02C08K3/26C08K5/053C08K3/34
CPCC08L23/14C08K2201/011C08L2203/18C08L2205/025C08L2205/24C08K9/12C08K5/1575
Inventor 李统一何楚华
Owner LIANSU TECH DEV WUHAN