Special material for heatproof polyethylene steel skeleton reinforced composite pipeline, and preparation method thereof

A technology of heat-resistant polyethylene and special materials for pipes, applied in the field of materials, can solve the problems of poor appearance gloss, low tensile strength, and high viscosity of HDPE materials, and achieve good surface gloss, small thermal shrinkage coefficient, and good resistance The effect of cracking performance

Inactive Publication Date: 2020-02-04
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, plastic sewage pipes are generally made of PE pipes and PP pipes, and HDPE and PP reinforced modified materials are used respectively. The pipes formed by these two materials can easily meet the general use requirements, but cannot meet the use requirements of transporting large amounts of waste water.
HDPE pipes have the following problems: 1. Low Vicat temperature, poor resistance, less than 80 ℃; 2. Low tensile strength, less than 18 MPa; 3. Low flexural modulus, less than 800 MPa; 4. Poor thermal conductivity; 5. Processing Poor performance, high viscosity of HDPE material, resulting in slow production speed and poor gloss of the appearance of the pipe

Method used

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  • Special material for heatproof polyethylene steel skeleton reinforced composite pipeline, and preparation method thereof
  • Special material for heatproof polyethylene steel skeleton reinforced composite pipeline, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Formula composition in parts by weight:

[0031] Polyethylene 80 kg

[0032] Filling 12 kg

[0033] Chain extender 3 kg

[0034] Flow modifier 2.5 kg

[0035] Antioxidant 0.3 kg

[0036] UV absorber 0.2 kg

[0037] Crosslinker 2 kg

[0038] 2) The preparation method is carried out according to the following steps:

[0039] (1) Add 12kg of alumina and 1 wt% silane coupling agent KH560 into the high mixer, keep the rotation speed at 2000 rpm, and stir at high speed for 30min to obtain the filler according to the present invention;

[0040] (2) Put 80 kg of polyethylene dried to remove moisture and 15 kg of filler obtained in step (1) into a high-speed mixer to mix, keep the rotating speed at 2000 rpm, and stir at high speed for 30 min;

[0041] (3) 3 kg of chain extender, 2.5 kg of fluoropolymer auxiliary agent PPA (CHY-F5000), 0.3 kg of antioxidant (by antioxidant 1010 0.15 kg, 0.15 kg of phosphite), 0.2 kg of UV531, and 2 kg of crosslinking agent were added t...

Embodiment 2

[0045] 1) Formula composition in parts by weight:

[0046] Polyethylene 80 kg

[0047] Filling 10 kg

[0048] Chain extender 3 kg

[0049] Flow modifier 3 kg

[0050] Antioxidant 0.6 kg

[0051] UV absorber 0.4 kg

[0052] Crosslinker 3 kg

[0053] 2) preparation method, carry out according to the following steps:

[0054] (1) Add 5kg of alumina, 5kg of magnesium oxide and 1 wt% of silane coupling agent KH560 into the high mixer, keep the rotation speed at 2000 rpm, and stir at high speed for 30min to obtain the filler according to the present invention;

[0055] (2) Put 80 kg of polyethylene dried to remove moisture and 8 kg of filler obtained in step (1) into a high-speed mixer to mix, keep the rotating speed at 2000 rpm, and stir at high speed for 30 min;

[0056] (3) 3 kg of chain extender obtained in step (2) after drying, 3 kg of flow modifier (2 kg of fluoropolymer additive PPA (CHY-F5000), 1 kg of silicone powder), antioxidant Add 0.6 kg (consisting of 0.4 kg of ...

Embodiment 3

[0060] Add 8.5 kg of polyethylene, 0.8 kg of alumina, 0.2 kg of magnesium oxide, 0.3 kg of chain extender, 0.1 kg of flow modifier, 0.06 kg of antioxidant, 0.04 kg of ultraviolet absorber, and crosslinking agent in an amount of 1 phr , 3 phr, and 5phr were mixed evenly, and melted and granulated in a twin-screw extruder. ℃, 170 ℃, screw speed 200 r / min, feeding speed 20 r / min, injection molding machine temperature 200 ℃, 210 ℃, 198 ℃, respectively. The samples obtained by injection molding were subjected to tensile (GB / T1040.2-2006) and impact (GB / T1943-2008) performance tests, and the results are shown in Table 2.

[0061] With the increase of the number of cross-linking agents, the impact strength of polyethylene is significantly improved, and the tensile strength is also significantly improved, which is the formation of a cross-linked network structure in the polymer material.

[0062] Table 1 is the performance index value of the heat-resistant polyethylene pipe prepared ...

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Abstract

The invention discloses a special material for a heatproof polyethylene steel skeleton reinforced composite pipeline, and a preparation method thereof. The special material comprises, by weight, 70-90parts of polyethylene (PE), 5-15 parts of a filler, 3-10 parts of a chain extender, 1.5-5 parts of a fluidity modifier, 0.3-1.2 parts of an antioxidant, 0.2-0.5 part of an ultraviolet absorber and 3-5 parts of a crosslinking agent. The heatproof polyethylene steel skeleton reinforced composite pipeline produced from the special material has the characteristics of good mechanical properties, goodlow-temperature impact resistance, high heat deformation temperature, good surface gloss, good production stability and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a special material for heat-resistant polyethylene steel skeleton reinforced composite pipes and a preparation method thereof. Background technique [0002] Plastic products are widely used in our lives, such as daily necessities, automobiles, aerospace and so on. In the field of transportation, plastic pipes play a very important role. Compared with traditional metal pipes, plastic pipes have light weight, corrosion resistance, high compressive strength, sanitation and safety, small water flow resistance, energy saving, metal saving, and life improvement. Environmental protection, long service life, safety and convenience, etc., are favored by the pipeline engineering industry. The development of plastic pipes not only promotes the development of manufacturing plastic pipes, but also can develop related fields such as plastic material modification research, formul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L27/12C08L83/04C08K13/06C08K9/06C08K3/22C08K5/524C08K5/14C08K5/132
CPCC08K2003/222C08K2003/2227C08L23/06C08L2201/08C08L2203/18C08L2205/03C08L27/12C08K13/06C08K9/06C08K3/22C08K5/524C08K5/14C08K5/132C08L83/04
Inventor 陈庆华洪韦琦黄宝铨钱庆荣孙晓丽成惠斌肖荔人
Owner FUJIAN NORMAL UNIV
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