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A kind of cold-resistant pp-r pipe and preparation method thereof

A technology of PP-R and pipes, applied in the field of cold-resistant PP-R pipes and their preparation, can solve the problems that the low-temperature toughness of PPR pipes cannot be fundamentally improved, and the content of β crystals is difficult to achieve, so as to reduce rigidity and improve low-temperature Toughness, cold resistance improvement effect

Active Publication Date: 2018-11-20
HAINAN LESSO TECH IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the existing PP-R pipe equipment and molds are all determined on the basis of unmodified PP-R resin, when the above-mentioned modified materials are used for molding, it is difficult for the existing equipment, molds and processes to achieve theoretical The content of β crystals is low, so the low temperature toughness of PPR pipes cannot be fundamentally improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take the extruded national standard PP-R water supply pipe dn20×2.8mm (PN2.0) as an example:

[0031] (1) Weigh the formula according to the mass ratio of polyolefin elastomer POE and long-chain branched polypropylene of 3:4, mix it evenly, add it to a twin-screw extruder to melt and granulate to obtain modified material A;

[0032] (2) Weigh the formula according to 100 parts of PP-R resin, 7 parts of modified material A and 8 parts of color masterbatch, mix evenly and then dry and extrude the pipe.

Embodiment 2

[0034] Take the extruded national standard PP-R water supply pipe dn25×3.5mm (PN2.0) as an example:

[0035] (1) Weigh the formula according to the mass ratio of polyolefin plastomer POP and long-chain branched polypropylene of 6:7, mix evenly, add to twin-screw extruder to melt and granulate to obtain modified material A;

[0036] (2) Weigh the formula according to 100 parts of PP-R resin, 13 parts of modified material A, and 4 parts of color masterbatch, mix evenly and then dry and extrude the pipe.

Embodiment 3

[0038] Take the extruded national standard PP-R water supply pipe dn20×2.8mm (PN2.0) as an example:

[0039] (1) Weigh the formula according to the mass ratio of polyolefin elastomer POE and long-chain branched polypropylene of 10:8, mix evenly and add to twin-screw extruder to melt and granulate to obtain modified material A;

[0040] (2) Weigh the formula according to 100 parts of PP-R resin, 18 parts of modified material A, and 10 parts of color masterbatch, mix evenly and then dry and extrude the pipe.

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PUM

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Abstract

The invention relates to a cold-resistant PP-R (polypropylene random) pipe and a preparation method thereof. Formulation components of the PPR pipe include PPR resin, a cold-resistant modifying agent and long chain branching polypropylene, wherein a mass ratio of the cold-resistant modifying agent to the long chain branching polypropylene is 1-15:1-10, and a mass ratio of the RRP resin and the cold-resistant modifying agent is 100:1-15. By synergistic effects of the cold-resistant modifying agent and the long chain branching polypropylene, low-temperature toughness of the pipe is greatly improved while original rigidity of the prepared PP-R pipe is kept.

Description

technical field [0001] The invention relates to the technical field of PP-R pipes, in particular to a cold-resistant PP-R pipe and a preparation method thereof. Background technique [0002] As we all know, PP-R pipe has the advantages of sanitation and non-toxicity, energy saving and environmental protection, light weight and high strength, heat resistance, long service life, convenient and reliable hot-melt connection, etc., and has become a major variety in the pipeline industry. However, because PP-R resin is easy to become brittle at low temperature, the toughness of the pipe becomes very poor at low temperature, which brings great difficulties to transportation and construction, which greatly limits the application of PP-R pipe. [0003] At present, pipe companies tend to improve the low-temperature toughness of PPR pipes through melt blending, that is, adding β-nucleating agents to PP-R resins or directly using β-PP-R raw materials to prepare PP- R pipe, which is als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/16C08L53/02C08L23/08C08L23/00
CPCC08L23/14C08L2203/18C08L2205/025C08L2205/035C08L2207/04C08L23/0815C08L23/12C08L23/00
Inventor 赵红磊李明张海华
Owner HAINAN LESSO TECH IND CO LTD
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