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Method for preparing pipeline material by utilization of recovered HDPE low-temperature solid-phase extrusion reaction

A technology of extrusion reaction and pipe, applied in the field of materials to achieve the effect of increasing shearing effect

Inactive Publication Date: 2013-08-14
上海宝利纳材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no patent report on making pipes with recycled HDPE materials in China. Therefore, the low-temperature solid-state reaction extrusion method used in this patent is used to manufacture recycled HDPE particles, and the cross-linking of HDPE is used to improve the physical properties of the material such as melt index and tensile strength. performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. According to the following components and ingredients (percentage by weight): Recycled HDPE (raw material comes from shampoo bottles, fruit baskets, etc., and the purity is greater than 97%, which is injection molding grade HDPE recycled material) 98%; Vinyltrimethoxysilane 0.6%; DCP0.4%; tert-butyl hydroquinone 0.8%; black masterbatch 0.2%.

[0019] b. Stir vinyltrimethoxysilane, DCP (dicumyl peroxide), tert-butylhydroquinone and color masterbatch with a mixer at a speed of 200r / m for two hours at 50°C and then recycle HDPE The materials are fed together into the feed port of a co-rotating twin-screw extruder (an extruder, a machine used to mix and process raw materials).

[0020] c. Use the extruder to extrude the mixture at a speed of 100rpm. The segmental temperatures of the extruder head are: 110, 110, 110, 120, 120, 130, 130 and 140°C, and cut into Dry after a certain size of particles. The results are shown in Table 1.

[0021] Performance comparison of HDP...

Embodiment 2

[0024] a. According to the following components and ingredients (percentage by weight): recycled HDPE (the raw material comes from shampoo bottles, fruit baskets, etc., and the purity is greater than 97%, which is the recycled HDPE material of injection molding grade) 97.8%; vinyl triethoxy 0.8% of base silane; 0.4% of DCP (dicumyl peroxide); 0.8% of tert-butyl hydroquinone; 0.2% of black masterbatch.

[0025] b. Stir vinyltrimethoxysilane, DCP, tert-butyl hydroquinone and black masterbatch with a mixer at a speed of 200r / m for two hours at 50°C and then add them to the co-rotating twin-screw together with recycled HDPE materials The extruder (an extruder, a machine used to mix and process raw materials) feeds into the mouth.

[0026] c. Use the extruder to extrude the mixture at a speed of 100rpm. The segmental temperatures of the extruder head are: 110, 110, 110, 120, 120, 130, 130, 140°C, and cut into Dry after a certain size of particles. The results are shown in Table 2...

Embodiment 3

[0031] a. According to the following components and ingredients (percentage by weight): recycled HDPE (the raw material comes from the bottle caps of bottles such as drinking water, and the purity is greater than 97% and is the recycled HDPE material of injection molding grade) 97.8%; vinyl triethoxy 0.8% of base silane; 0.4% of DCP; 0.8% of diaryl secondary amine; 0.2% of black masterbatch.

[0032] b. Stir vinyltriethoxysilane, DCP, diaryl secondary amine and color masterbatch with a mixer at a speed of 200r / m for two hours at 50°C and then add them to the co-rotating twin-screw extruder together with recycled HDPE materials Extruder (an extruder, a machine used to mix and process raw materials) into the feed port.

[0033] c. Use the extruder to extrude the mixture at a speed of 100rpm. The segmental temperatures of the extruder head are: 110, 110, 110, 120, 120, 130, 130, 140°C, and cut into Dry after a certain size of particles.

[0034] Performance comparison of HDPE m...

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Abstract

The invention relates to the material field and modification of a high-molecular material and discloses a method for preparing a pipeline material by the utilization of a recovered HDPE (high density polyethylene) low-temperature solid-phase extrusion reaction. Raw materials contain the following substances: by weight, 96.8%-99.7% of recovered HDPE, 0.1%-2% of a cross-linking agent and 0.1%-1.5% of an anti-oxidant. The method provided by the invention comprises the following steps: (1) drying the raw materials except the recovered HDPE, uniformly mixing the dried raw materials at 40-50 DEG C, and adding the raw materials and the recovered HDPE together into an extruder; and (2) extruding the mixture by the use of the extruder at 110-140 DEG C and at the speed of 80-150 rpm. According to the invention, the low-temperature solid-phase extrusion reaction is adopted and the traditional concept of recycled material recycling is changed, physical modification and chemical modification are carried out in the extruder at the same time, and injection-moulding-grade plastic is modified into extrusion-grade plastic which can be used as a special pipeline material.

Description

technical field [0001] The invention relates to the field of materials, in particular to the modification of polymer materials, in particular to a method for preparing pipeline materials by using recycled high-density polyethylene (HDPE) low-temperature solid-phase extrusion reaction. Background technique [0002] There are a large number of injection molding grade HDPE regrinds on the market, and their performance deteriorates during reprocessing. The general purpose is to downgrade them and use them as low-grade low-value-added products. Low-temperature solid-state reaction extrusion technology is often used in materials rich in functional groups such as PET and PC, but it has not been used in relevant literature and patents of HDPE. Through the innovation of formula and process, a method to improve the performance of recycled plastics is determined without a large increase in cost. Using low-temperature solid-phase reaction extrusion technology, the molecular weight and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K5/14C08K5/5425C08K5/13C08K5/524C08K5/17C08J3/24B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 张靓吴艳萍刘陈晓许海燕邢紫云吴驰飞
Owner 上海宝利纳材料科技有限公司
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