Method for preparing high-toughness PPR (polypropylene random) plastic pipeline by using high-absorption laser through annealing

A technology of plastic pipes and laser annealing, applied in coating and other directions, can solve the problems of inability to realize on-line heat treatment, shorten the time of heat treatment process, and long annealing time, so as to improve the annealing effect, shorten the time of heat treatment process, and improve the degree of orientation and crystallization. improved effect

Inactive Publication Date: 2018-08-14
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the technical defects that the conventional PPR annealing process in the prior art is cumbersome, there are secondary processes, and the annealing time is long, the efficiency is low, and online heat treatment cannot be realized. The method greatly improves the annealing effect, significantly improves the impact toughness of PPR pipes under low temperature conditions, shortens the heat treatment process time, and improves production efficiency

Method used

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  • Method for preparing high-toughness PPR (polypropylene random) plastic pipeline by using high-absorption laser through annealing
  • Method for preparing high-toughness PPR (polypropylene random) plastic pipeline by using high-absorption laser through annealing

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Experimental program
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Effect test

Embodiment 1

[0032](1) Weigh 1 part of HDPE powder with a particle size of 150nm, 3 parts of talc powder with a particle size of 230nm, 0.2 part of triethylhexyl phosphoric acid, 0.11 part of polyoxypropylene glyceryl ether, and 1.5 parts of epoxy resin according to the mass ratio adhesive and 94 parts of pentane;

[0033] (2) Set the ultrasonic power to 8kW, control the ultrasonic time to 25 minutes, ultrasonically disperse the HDPE powder, triethylhexyl phosphoric acid, and polyoxypropylene glyceryl ether in pentane, set the stirring speed to 330rpm, and the stirring time to 5 Minutes, the above raw materials were stirred and mixed uniformly to obtain an emulsion, and then talc powder was added to the emulsion and stirred uniformly to obtain a talc powder / HDPE blended precursor;

[0034] (3) Put the talc powder / HDPE blended precursor into a high-pressure container, press HDPE into the talcum powder layer under an isostatic pressure of 0.28 MPa to obtain HDPE intercalated talc powder, and...

Embodiment 2

[0037] (1) Weigh 1 part of HDPE powder with a particle size of 500nm, 2 parts of talc powder with a particle size of 600nm, 0.33 part of methyl pentanol, 0.08-0.12 part of polyoxyethylene polyoxypropanolamine ether, 2 parts part polyvinyl acetate adhesive and 95 parts octane;

[0038] (2) Set the ultrasonic power to 10kW, control the ultrasonic time to 35 minutes, ultrasonically disperse the HDPE powder, methyl pentanol, and polyoxyethylene polyoxypropanolamine ether in an organic solvent, set the stirring speed to 360rpm, and stir The time is 9 minutes, the above raw materials are stirred and mixed uniformly to obtain an emulsion, and then talcum powder is added to the emulsion and stirred uniformly to obtain a talc powder / HDPE blended precursor;

[0039] (3) Put the talc powder / HDPE blended precursor into a high-pressure container, press HDPE into the talcum powder layer under an isostatic pressure of 2.2 MPa to obtain HDPE intercalated talc powder, and then put the HDPE in...

Embodiment 3

[0042] (1) Weigh 1 part of HDPE powder with a particle size of 300nm, 4 parts of talc powder with a particle size of 80-600nm, 0.25 part of a combination of polyacrylamide and fatty acid polyethylene glycol ester, 0.12 part of polyoxypropylene A combination of glyceryl ether and polyoxypropylene polyoxyethylene glyceryl ether, a combination of 2 parts polyvinyl alcohol adhesive and 92.5 parts pentane, hexane and octane;

[0043] (2) Set the ultrasonic power to 7kW, control the ultrasonic time to 26 minutes, and ultrasonicate the combination of HDPE powder, polyacrylamide and fatty acid polyethylene glycol ester, polyoxypropylene glyceryl ether and polyoxypropylene polyoxyethylene glyceryl ether Disperse in an organic solvent, set the stirring speed to 650 rpm, and the stirring time to 8 minutes, stir and mix the above raw materials to obtain an emulsion, then add talcum powder to the emulsion and stir evenly to obtain a talc powder / HDPE blended precursor;

[0044] (3) Put the ...

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Abstract

The invention provides a method for preparing high-toughness PPR (polypropylene random) plastic pipeline by using high-absorption laser through annealing. Firstly, HDPE powder is dispersed to be madeinto emulsion; then, the emulsion is pressed into positions between layers of talcum powder; after the fast freeze drying, bonding agents and the like are added to be made into absorption coating; theabsorption coating is uniformly sprayed onto the surface of an extruded PPR pipeline blank; then, the PPR pipeline blank sequentially passes through a fixed diameter hole and a laser annealing box; in the annealing box, CO2 laser with a certain wave length is used for fast irradiation; fast cooling and cutting are performed to obtain the high-toughness PPR plastic pipeline. The method provided bythe invention has the advantages that the defects that the conventional PPR annealing process is complicated, whole vehicles of products need to enter the annealing box to be subjected to heat treatment, secondary work procedures exist, in addition, the annealing time is long and the efficiency is low are overcome. Therefore the goal of improving the impact toughness of the PPR pipeline materialunder the low-temperature condition is achieved; the heat treatment process time is shortened; the technical effects of the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of polymer composite material processing, in particular to a method for preparing high-toughness PPR plastic pipes by using high-absorption laser annealing. Background technique [0002] Random copolymerized polypropylene (PPR) has the advantages of heat preservation and energy saving, green environmental protection and excellent heat resistance, oxygen stability and hygienic performance. Due to its excellent physical and mechanical properties, molding performance and good chemical stability, heat resistance In recent years, it has been widely used in the industrial field, especially in the application of indoor and outdoor hot and cold water pipes. PPR pipes have very high requirements on the comprehensive performance of the resin, requiring good rigidity, heat resistance, chemical resistance and creep resistance of the resin, and require a certain impact resistance. However, due to its high low-temperature brittlen...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C08J7/00C08J7/04C09D123/06C09D7/61C08L23/12
CPCC08J7/0427C08J7/08C08J2323/12C08J2423/06C08L2205/025C08L2205/03C08L2205/035C09D7/61C09D123/06C08L63/00C08K3/34C08L31/04C08L29/04C08L27/06
Inventor陈庆昝航
OwnerCHENDU NEW KELI CHEM SCI CO LTD