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

PP-R cold-resistant anti-freeze antibacterial pipe and preparation method thereof

A PP-R, cold-resistant technology, used in chemical instruments and methods, pipes, rigid pipes, etc., can solve the problems of less addition, rigidity of pipes, reduced hydrostatic performance, and influence of hot-melt effect, etc., and achieve excellent low-temperature resistance performance. Effect

Inactive Publication Date: 2018-04-06
ZHEJIANG LONGCAI PLASTIC IND
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The existing technology solves the low-temperature brittleness of PP-R mainly by adding a certain amount of cold-resistant modifier. The effect is not obvious if the amount is small, and the rigidity and hydrostatic performance of the pipe will be reduced if the amount is large. At the same time, adding the cold-resistant modifier will also affect the hot melt Effect, after many continuous experiments, we found that adding a reinforcing modifier can solve the above problems, even if it is used as an intermediate layer, it will not affect the hot-melt performance

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PP-R cold-resistant anti-freeze antibacterial pipe and preparation method thereof
  • PP-R cold-resistant anti-freeze antibacterial pipe and preparation method thereof
  • PP-R cold-resistant anti-freeze antibacterial pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0027] Preparation Example 1: Modified Material A1

[0028] Random polypropylene PP-R 100 parts

[0029] 25-50 parts of cold resistance modifier

[0030] 1-10 parts of reinforcement modifier; wherein, the cold-resistant modifier is PP thermoplastic elastomer, the reinforcement modifier is nano-calcium carbonate, and the particle size of the reinforcement modifier is ≤5um.

[0031] The preparation process of modified material A1 is as follows: 1) Add the reinforcing modifier, cold-resistant modifier and dispersant to the high-speed mixer and mix to make the reinforcing modifier reach the pre-dispersion effect, and then mix it with polypropylene PP-R resin evenly. 2) Add the mixture evenly into a twin-screw extruder for kneading and extrusion, then cool, pelletize and dry.

[0032] Modified material B1

[0033] Random polypropylene PP-R 100 parts;

[0034] 25-50 parts of cold resistance modifier;

[0035] 1 to 10 parts of reinforcing modifier;

[0036] 1~20 parts of inorga...

preparation example 2

[0038] Preparation example 2: modified material A2

[0039] Random polypropylene PP-R 100 parts

[0040] 20-50 parts of cold resistance modifier

[0041] 1-10 parts of reinforcement modifier; wherein, the cold-resistant modifier is PP thermoplastic elastomer (ethylene-octene copolymer POE), and the reinforcement modifier is nano silicon dioxide.

[0042] The preparation process of modified material A2 is as follows: 1) Add the reinforcing modifier, cold-resistant modifier and dispersant to the high-speed mixer and mix to make the reinforcing modifier achieve the pre-dispersion effect, and then mix it with polypropylene PP-R resin evenly. 2) Add the mixture evenly into a twin-screw extruder for kneading and extrusion, then cool, pelletize and dry.

[0043] Modified material B2

[0044] Random polypropylene PP-R 100 parts;

[0045] 25-50 parts of cold resistance modifier;

[0046] 1 to 10 parts of reinforcing modifier;

[0047] 1-20 parts of inorganic silver ion antibacteria...

Embodiment 1

[0050] Take the production of national standard dn20×3.4PP-R pipes by three-layer composite co-extrusion method as an example.

[0051] Outer layer: 100 parts of PP-R resin, 2 parts of color masterbatch;

[0052] Middle layer: 100 parts of PP-R resin, 30 parts of cold-resistant modifier, and 3 parts of nano-calcium carbonate reinforcing modifier are mixed and granulated, and the granules are prepared by the preparation method of modified material A1 in Preparation Example 1 ; 3 parts of color masterbatch;

[0053] Inner layer: 100 parts of PP-R resin, 30 parts of cold-resistant modifier, 2 parts of nano-calcium carbonate reinforcing modifier, 4 parts of inorganic silver ion antibacterial agent, the mixed granulation material of preparation example 1 modified material B1 The preparation method to prepare the pellets; 3 parts of color masterbatch.

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 relates to the technical field of PP-R pipes, in particular to a PP-R cold-resistant anti-freeze antibacterial pipe and a preparation method thereof. For the cold-resistant anti-freeze antibacterial PP-R pipe, the outer layer is prepared from PP-R resin, the middle layer is prepared from granular materials comprising a cold-resistant modifier, a reinforced modifier and PP-R resin, and the inner layer is prepared from granular materials comprising a cold-resistant modifier, an antibacterial agent and PP-R resin. According to the cold-resistant anti-freeze antibacterial PP-R pipe,for a simply supported beam impact test, the test sample damage rate is 0 when the temperature is -10 DEG C, the pipe has the excellent low-temperature-resistant performance, a hydrostatic test, longitudinal reversion and the like of the pipe produced through a co-extrusion technology according to the specific proportion of the PP-R resin, the cold-resistant modifier, the reinforced modifier and inorganic silver ion antibacterial agent all conform to GB / T18742.2 regulations and requirements, and the antibacterial property can reach 99%.

Description

technical field [0001] The invention relates to the technical field of PP-R pipes, in particular to a PP-R cold-resistant, antifreeze and antibacterial pipe and a preparation method thereof. Background technique [0002] PP-R pipe has the advantages of convenient installation and construction, sanitation and environmental protection, light specific gravity, high strength, long service life, etc., and has been widely used in the transportation of drinking water. The toughness below 0°C is poor, which brings certain difficulties and quality risks to transportation and installation. Also because of the low-temperature brittleness of PP-R pipes, water in the pipes often freezes in cold winters, causing PP-R pipes to freeze. Freezing and cracking will cause certain economic losses to users. [0003] With the improvement of living standards and the enhancement of people's awareness of green health, especially the gradual popularization of direct drinking water systems, the requir...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08C08K3/26C08K3/36C08K3/015F16L9/12B32B27/08B32B27/32B32B27/18B29C47/06B29L23/00
Inventor 姜渭龙
Owner ZHEJIANG LONGCAI PLASTIC IND