PPR pipe material resistant to low-temperature cracking, preparation method thereof and PPR pipe product prepared from PPR pipe material

A low-temperature-resistant, high-quality product technology, which is applied in the processing field of PPR pipes, can solve the problems of low-temperature shock contribution, failure to meet the anti-cracking requirements of low-temperature environments, and cracking of PPR pipes, so as to improve brittleness, enhance crystal structure stability, Effect of reducing intermolecular tension

Active Publication Date: 2021-07-02
长春联塑实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent application CN109485996A discloses a PPR pipe, which improves the room temperature impact effect of the PPR pipe through nano particle filling modification, but does not contribute much to the low temperature impact
Chinese patent application CN 104592644 A discloses a low-temperature cracking-resistant PPR pipe with controllable crystal form, using a crystal form regulator and long-chain branched polypropylene as a low-temperature cracking-resistant modifier to improve the low-temperature cracking resistance of the PPR pipe, but Under the impact test of 0℃, 1.5kg, and 1.5m, 20% of the PPR pipes still crack, which cannot meet the actual anti-cracking requirements in low temperature environments.

Method used

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  • PPR pipe material resistant to low-temperature cracking, preparation method thereof and PPR pipe product prepared from PPR pipe material
  • PPR pipe material resistant to low-temperature cracking, preparation method thereof and PPR pipe product prepared from PPR pipe material
  • PPR pipe material resistant to low-temperature cracking, preparation method thereof and PPR pipe product prepared from PPR pipe material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0051] Embodiments 1-5 provide a PPR pipe material, the contents of each component are shown in Table 1, and the preparation method follows the following steps:

[0052] Mix PPR, PPB, LLDPE, color masterbatch, and β-nucleating agent evenly to obtain a low-temperature cracking-resistant PPR pipe material.

[0053] The component content (weight part) of table 1 embodiment 1~5PPR pipe material

[0054] 1 2 3 4 5 PPR 100 100 100 100 100 PPB 10 15 20 10 10 β nucleating agent 0.05 0.05 0.05 0.1 0.05 LLDPE 5 5 5 5 3 Masterbatch 5 5 5 5 5

Embodiment 6～10

[0056] Examples 6-10 are PPR pipes prepared by using the pipe materials of Examples 1-5 respectively, and the preparation method follows the following steps:

[0057] S1. Extrude the low-temperature cracking-resistant PPR pipe material through a single-screw extruder to obtain a billet, and then cool and shape it to obtain a PPR pipe product to be processed;

[0058] Among them, the front section of the single-screw extruder adopts hole-type extrusion, and the total length of the die mouth of the single-screw extruder and the straight shaping section of the mandrel is 80mm;

[0059] The barrel temperature for extrusion molding is 180-210°C, the confluence core temperature is 160-180°C, and the mold temperature is 180-210°C;

[0060]Cooling and shaping is vacuum cooling, the vacuum degree during cooling is -0.02~-0.06MPa, and the cooling temperature is 15~23°C;

[0061] S2. The PPR pipe product to be treated obtained in step S1 is cured at 20° C. for 24 hours to obtain a PPR p...

Embodiment 11～12

[0063] Examples 11-12 are all PPR pipes prepared by using the pipe material of Example 1. The difference between the preparation method and Example 6 is:

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Abstract

The invention discloses a PPR pipe material resistant to low-temperature cracking, a preparation method of the PPR pipe material and a PPR pipe product prepared from the PPR pipe material. The PPR pipe material resistant to low temperature cracking is prepared from the following components in parts by weight: 100 parts of PPR, 10 parts of PPB, 0.05 to 0.1 part of beta nucleating agent, 3 to 5 parts of LLDPE (Linear Low Density Polyethylene) and 3 to 5 parts of color master batch, wherein the PPR pipe product is prepared from the PPR pipe material, and the preparation method of the PPR pipe product comprises the steps of forming, cooling and curing treatment. The PPB, the beta nucleating agent and the LLDPE are added for synergistic interaction, so that the problem of brittleness of PPR at low temperature is effectively improved, and the PPR pipe material with excellent low-temperature cracking resistance is obtained. By utilizing the PPR pipe material, through long-time curing treatment at a relatively low temperature, the intermolecular tension of each component in the PPR pipe material is effectively reduced, the stability of a crystal structure is enhanced, and the low-temperature cracking resistance of a PPR pipe product is further improved.

Description

technical field [0001] The invention relates to the technical field of PPR pipe processing, and more specifically, relates to a low-temperature cracking-resistant PPR pipe material, a preparation method thereof, and a prepared PPR pipe product. Background technique [0002] Random copolymerized polypropylene (PPR) resin is one of the most commonly used raw materials in the production of plastic pipes. Due to the random distribution of comonomers on the main chain of polypropylene, its molecular structure and crystallization characteristics are changed, so that the material has excellent physical and mechanical properties, molding and processing properties and good chemical stability. PPR pipes are widely used in the preparation of water supply pipelines, fresh water pipelines, building heating pipelines, chemical material pipelines, agricultural and forestry irrigation pipelines and other fields. [0003] However, the toughness of PPR pipes is poor, especially in Northeast ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L53/00C08L23/08
CPCC08L23/14C08L2203/18C08L53/00C08L23/0815
Inventor 王振陈建辉
Owner 长春联塑实业有限公司
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