Process for manufacturing plate by recycling waste polypropylene

A technology of waste polypropylene and process method, which is applied in the field of sheet production, can solve the problems of polluting the environment and wasting resources, and achieves the effects of high strength, wide application, and enhanced strength and toughness.

Inactive Publication Date: 2012-10-31
TIANJIN LISHUN PLASTIC PRODS
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  • Abstract
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AI Technical Summary

Problems solved by technology

Traditional treatment methods waste resources and pollute the environment

Method used

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Embodiment Construction

[0028] A process for recycling waste polypropylene for making boards, comprising the steps of:

[0029] (1) Pretreatment of the grain husk: use NaOH to modify the grain husk, and soak the grain husk in lye;

[0030] (2) Recycling of polypropylene from waste plastics: Grinding polypropylene waste plastics into fine particles and pelletizing them on an extruder;

[0031] (3) Proportion, fully mix and pave the recovered polypropylene granules with new polypropylene material and treated grain husk; the proportion of each component is: polypropylene: 72wt%, of which waste polypropylene: pure polypropylene Propylene=5:1 (mass ratio); grain hull: 25wt%; silane coupling agent: 3wt%;

[0032] (4) Heat the paved raw materials directly, then press them with 3MPa pressure, hold at a temperature of 200°C, hold for 3 hours, and demould after sufficient cooling to obtain the required composite sheet.

[0033] Among them, waste polypropylene is recycled plastic packaging boxes.

[0034] Th...

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Abstract

The invention provides a process for manufacturing a plate by recycling waste polypropylene. The process comprises the following steps of: 1, preprocessing plant fibers, namely modifying the plant fibers by using alkaline; 2, recycling polypropylene from waste plastics, namely grinding the polypropylene of the waste plastics into fine particles, pelleting the fine particles by virtue of an extruding machine; 3, proportioning the recycled polypropylene particles with new polypropylene material and the recycled plant fibers, fully mixing and spreading; and 4, directly heating the spread raw materials, applying a certain pressure for pressing, maintaining the pressure for certain time, fully cooling, and demoulding to obtain the required composite plate. According to the process provided by the invention, the waste polypropylene is effectively recycled, the plant fibers are recycled, and the strength of the plate is enhanced; and the process is environmentally-friendly. The plate can be widely applied, and is especially suitable for manufacturing a plastic pass box, a folding box and an anti-static box.

Description

technical field [0001] The invention relates to the technical field of polymer materials and the technical field of processing, and relates to a process method for recycling polypropylene in waste plastics to make boards. Background technique [0002] Polypropylene (PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. It is widely used in industry and is one of the common polymer materials. Polypropylene is a thermoplastic resin obtained by the polymerization of propylene. It is non-toxic and odorless. It is divided into isotactic Polypropylene (isotaetic PolyProlene), atactic Polypropylene (atactic Polypropylene) and syndiotactic Polypropylene (syndiotactic PolyPropylene) according to the position of the methyl group. kind. It has the advantages of high strength, high hardness, wear resistance, bending fatigue resistance, high heat resistance, excell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/10C08L97/02C08H8/00B29C70/34B29B9/06
Inventor 窦华利
Owner TIANJIN LISHUN PLASTIC PRODS
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