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Polyethylene corrugated pipe and preparation method thereof

The technology of polyethylene and corrugated pipes is applied in the field of polyethylene corrugated pipes and their preparation, which can solve the problems of rising cost of pipe wall thickness, layered collapse of pipes, large decrease in rigidity, etc., and achieves low requirements, low cost, and impact resistance. Strength-enhancing effect

Inactive Publication Date: 2014-07-23
KANGTAI PLASTIC SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ring stiffness of polyethylene corrugated pipes is not suitable for deep burial environments, environments with severe loose soil and subsidence, and environments with high groundwater levels. Especially in summer, because polyethylene pipes are generally black at the installation site, the temperature of the pipes will be lower after sunlight. It is very high, the rigidity drops greatly, and it is easy to deform. In view of the lack of ring stiffness and high temperature deformation of polyethylene corrugated pipes, existing products mainly use steel belt reinforcement or a large increase in pipe thickness to improve their ring stiffness. After being corroded, the pipe will have problems such as stratification and collapse, and a large increase in the wall thickness of the pipe will increase the cost a lot, which does not comply with the energy-saving and emission-reduction policy

Method used

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  • Polyethylene corrugated pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] a, initial mixing: with 80 kilograms of high-density polyethylene, 10 kilograms of ultra-high molecular weight polyethylene, 1.7 kilograms of linear low-density polyethylene, 5 kilograms of isotactic polypropylene, 3 kilograms of α-modified polypropylene, 3 kilograms of maleic anhydride Branched ethylene copolymer, 3 kg of propylene-ethylene copolymer, 8 kg of quartz sand masterbatch, 0.5 kg of phosphite antioxidant, 0.8 kg of benzophenone, 1 kg of black carbon black, 0.5 kg of nano-silica at 23 Stir for 4 minutes under the condition of ℃ to obtain the primary mixture. After the stirring is completed, control the temperature of the primary mixture at 40°C and send it to the next process for use;

[0042] b. Pelletizing: Add the primary compound in step a into a twin-screw extruder to extrude and granulate. The third zone of the barrel is 185°C, the fourth zone of the barrel is 190°C, the fifth zone of the barrel is 200°C, the first zone of the machine head is 185°C, the...

Embodiment 2

[0049] a, initial mixing: with 60 kilograms of high-density polyethylene, 20 kilograms of ultra-high molecular weight polyethylene, 3 kilograms of low-density polyethylene, 16 kilograms of isotactic polypropylene, 2 kilograms of β-modified polypropylene, ethylene-vinyl acetate copolymer 2.8 Kilogram, 3 kilograms of propylene-ethylene copolymers, 8 kilograms of talcum powder, 0.55 kilograms of phenolic antioxidants, 0.7 kilograms of benzoic acid esters, 1.0 kilograms of white carbon black, and 4 kilograms of nano-titanium dioxide were stirred for 3.5 minutes at 25 ° C to obtain For primary mixing, control the temperature of the primary mixing at 42°C and send it to the next process for use;

[0050] b. Granulation: Extrude and granulate the primary mixture obtained in the previous process with a twin-screw extruder. The granulation temperature is: 145°C in the first zone of the barrel, 173°C in the second zone of the barrel, and 173°C in the third zone of the barrel 188°C, 190°...

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Abstract

The invention relates to a polyethylene corrugated pipe and a preparation method thereof, belonging to the technical field of non-metal building materials. The invention aims to provide a high-strength aging-resistant polyethylene corrugated pipe which is prepared through the following steps: preliminarily mixing the following raw materials in parts by weight: 75-100 parts of polyethylene, 5-25 parts of polypropylene, 0.5-15 parts of compatibilizer, 0.5-25 parts of rigid master batch, 0.05-1.5 parts of antioxidant, 0.02-1.5 parts of light stabilizer, 0.05-5 parts of light screening agent and 0.5-10 parts of nano material, uniformly stirring, and then granulating to obtain a preliminarily mixed granulation material; adding 2-15 parts by weight of engineering plastic, blending with the preliminarily mixed granulation material, uniformly stirring, and then granulating to obtain a blended granulation material; and then extruding the blended granulation material through an extruder, sizing with a mold, cooling, pulling, and cutting.

Description

technical field [0001] The invention belongs to the technical field of non-metal building materials, and in particular relates to a polyethylene corrugated pipe and a preparation method thereof. Background technique [0002] Due to the increase in the area of ​​urban streets and the disrepair of some urban drainage systems, when there is a heavy rainstorm, it will be difficult to discharge sewage and drainage, causing floods, and even major life safety accidents. Therefore, the country has invested a lot of money in the transformation of urban drainage systems. Traditional municipal sewage and drainage pipes are mainly steel pipes, cement pipes and cast iron pipes. However, due to the high cost of these pipes, short service life, difficult installation and maintenance, and leakage after a long time of use, the national policy guides the promotion of the use of polymer plastic pipes. Because polyethylene corrugated pipe has the advantages of low material cost, good toughness...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L23/08C08L59/00C08L55/02C08L69/00C08L77/00C08K3/26C08K3/34C08K3/36C08K7/14C08K3/22B29C47/92B29C48/92
CPCB29B9/12B29B7/40B29B7/46B29B7/72B29B7/7461B29B9/06B29C48/04B29C48/13B29C48/92B29C2948/92514B29C2948/92542B29C2948/92561B29C2948/92571B29C2948/9259B29C2948/92619B29C2948/92647B29C2948/92704B29C2948/92761B29C2948/92895B29C2948/92933B29C2948/9298C08K2003/2241C08L23/06B29C2948/9258C08K2201/011C08L2203/18C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L2207/068C08L23/0815C08L23/12C08K13/02C08K3/36C08K3/04C08K5/07C08L23/0853C08K3/34C08K5/101
Inventor 林云青张双全周祖明
Owner KANGTAI PLASTIC SCI & TECH GRP
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