Method for preparing plastic tray from three-layer composite film recycled material

A technology for plastic pallets and recycled materials, which is applied in the field of preparing pallets from plastic recycled materials, can solve the problems of low tensile strength of blended materials, incompatibility between BOPET and CPP materials, and high brittleness, so as to improve the weather resistance of products and be easy to wash. Effects of sterilization, improved tensile strength and notched impact strength

Inactive Publication Date: 2012-01-18
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the incompatibility of BOPET and CPP materials in the processing process of the three-layer composite film recycled material, the occurrence of delamination, the low tensile strength of the blended material, and the high brittleness, the invention provides a three-layer composite film recycled material Method for preparing plastic pallets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The three-layer composite film recycling material containing 45-58 parts by mass of BOPET film, 5-8 parts by mass of EVA, and 37-47 parts by mass of CPP film is cleaned of dust and impurities, placed in a crusher, and crushed into film fragments; the film Put the fragments into an electric heating constant temperature blast drying oven, control the temperature of the electric heating constant temperature blast drying oven at 115°C, and dry for 6 hours; weigh 90Kg of the dried three-layer composite film recycling material fragments and place them in a mixer, and add butyl acrylate grafting The rate is LLDPE-g-BA mass parts 7.53 %of LLDPE-g-BA 8Kg, tris(2,4-di-tert-butylphenyl)phosphite 0.8Kg, tris(1,2,2,6,6-pentamethyl-4-piperidinyl)phosphite Ester 0.55Kg, rutile titanium dioxide 0.65Kg, phthalocyanine green 0.4Kg, control the speed of the mixer at 250r / min, temperature 103°C, stir and mix for 13min, and stir to form a mixture; put the mixture in a conical co-rotating tw...

Embodiment 2

[0017] The three-layer composite film recycling material containing 45-58 parts by mass of BOPET film, 5-8 parts by mass of EVA, and 37-47 parts by mass of CPP film is cleaned of dust and impurities, placed in a crusher, and crushed into film fragments; the film Put the fragments into an electric heating constant temperature blast drying oven, control the temperature of the electric heating constant temperature blast drying oven at 114°C, and dry for 6 hours; weigh 87Kg of the dried three-layer composite film recycling material fragments and place them in a mixer, and add butyl acrylate grafting The rate is LLDPE-g-BA mass score 7.53 %of LLDPE-g-BA 10Kg, tris(2,4-di-tert-butylphenyl)phosphite 0.6Kg, tris(1,2,2,6,6-pentamethyl-4-piperidinyl)phosphite Ester 0.7Kg, rutile titanium dioxide 0.5Kg, phthalocyanine green 0.5Kg, control the speed of the mixer at 250r / min, temperature 102°C, stir and mix for 13min, and stir to form a mixture; put the mixture in a conical co-rotating twi...

Embodiment 3

[0019] The three-layer composite film recycling material containing 45-58 parts by mass of BOPET film, 5-8 parts by mass of EVA, and 37-47 parts by mass of CPP film is cleaned of dust and impurities, placed in a crusher, and crushed into film fragments; the film Put the fragments into an electric heating constant temperature blast drying oven, control the temperature of the electric heating constant temperature blast drying oven at 116°C, and dry for 6 hours; weigh 92Kg of the dried three-layer composite film recycling material fragments and place them in a mixer, and add butyl acrylate grafting The rate is LLDPE-g-BA mass score 7.53 %of LLDPE-g-BA6Kg, tris(2,4-di-tert-butylphenyl) phosphite 1.0Kg, tris(1,2,2,6,6-pentamethyl-4-piperidinyl) phosphite 0.4Kg, rutile titanium dioxide 0.8Kg, phthalocyanine green 0.3Kg, control the speed of the mixer at 250r / min, temperature 104°C, stir and mix for 13min, and stir to form a mixture; put the mixture in a conical co-rotating twin-scre...

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Abstract

The invention relates to a method for preparing a plastic tray from a three-layer composite film recycled material serving as a basic raw material. The method comprises the following steps of: taking 87 to 92 weight parts of three-layer composite film recycled material, 6 to 10 weight parts of butyl acrylate grafted linear low-density polyethylene (LLDPE-g-BA), 0.6 to 1.0 weight part of tris-(2,4-di-tert-butyl-pheny)phosphite, 0.4 to 0.7 weight part of tris(1,2,2,6,6-pentamethyl-4-piperidine)phosphite, 0.5 to 0.8 weight part of rutile type titanium dioxide and 0.3 to 0.5 weight part of phthalocyanine green, and performing crushing, drying, mixing, extrusion and injection molding. Compared with a wooden tray, the plastic tray prepared by the method has the characteristics of high compression strength, high stretchability, acid and alkali resistance, capacity of being easily washed and disinfected, no mildew and the like, and is suitable for the industries of machines, electronics, foods, clothing and the like.

Description

technical field [0001] The invention relates to a method for preparing a tray from recycled plastic materials, in particular to a method for preparing a plastic tray from recycled materials of a three-layer composite film. Background technique [0002] Cast polypropylene film (CPP film) and biaxially oriented polyethylene terephthalate film (BOPET film) as the inner and outer layers, and ethylene-vinyl acetate copolymer (EVA) as the middle adhesive layer The three-layer composite film has the characteristics of high tensile strength, good rigidity, crispness and folding resistance, high light transmittance, good gas (oxygen, carbon dioxide) barrier properties, and oil resistance, and is widely used in the food packaging industry. Most of these films are disposable, and it is difficult to directly recycle them after they are discarded, resulting in waste of resources and environmental pollution. Therefore, how to effectively utilize the resource of three-layer composite film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L31/04C08L23/12C08L51/06C08K13/02C08K5/526C08K5/524C08K3/22B29B17/04B29B9/06B29B7/00B29B7/80B29C47/92B29C45/78B29C48/92
CPCB29C48/40B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 张华集陈晓张雯
Owner FUJIAN NORMAL UNIV
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