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Degradable polyolefin masterbatch and production method thereof

A polyolefin and masterbatch technology, applied in the field of degradable polyolefin masterbatch and production, can solve the problems of the degradation speed of the degradable film and the difficulty in meeting the use requirements of thoroughness, and achieve accelerated biodegradation speed, low equipment requirements, and production costs. low effect

Inactive Publication Date: 2014-12-10
HECHANG GUANGXI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the degradation of polyolefin plastics mainly includes biodegradation, photodegradation, or the combined effect of the two. It has also been successfully applied to various agricultural films and packaging films, but in some special environments, this degradable film cannot The degradation speed and thoroughness are difficult to meet the use requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by weight: 80 parts of 1250-mesh yuanming powder, 40 parts of potato starch, 10 parts of low-density polyethylene, 6 parts of linear low-density polyethylene, 4 parts of ethylene-vinyl acetate copolymer, 1.2 parts of KH-550, iron stearate 1.5 parts, polyethylene wax 4 parts, zinc stearate: 1.2 parts.

[0036] Method steps:

[0037] (1) Firstly, add sodium starch glycolate and starch into a high-speed mixer, stir and heat to 100°C, exhaust, add coupling agent and continue stirring for 12 minutes, and finally add low-density polyethylene, linear low-density polyethylene, ethylene-vinyl acetate The copolymer, photosensitizer and processing aid are stirred for 6 minutes, and then discharged.

[0038] (2) Pelletizing: Extrude the reserve material through a co-rotating twin-screw extruder with an aspect ratio of 40 to obtain a finished product.

[0039] During the granulation process, the process parameters of the extruder:

[0040] temperature setting:

[0041] ...

Embodiment 2

[0044] In parts by weight: 60 parts of 2000 mesh yuanming powder, 60 parts of potato starch, 8 parts of low-density polyethylene, 10 parts of linear low-density polyethylene, 8 parts of ethylene-vinyl acetate copolymer, 2 parts of coupling agent L-1Z, hard 1.5 parts of iron stearate, 0.5 parts of BP photosensitizer, 6 parts of polyethylene wax, and 0.8 parts of zinc stearate.

[0045] Method steps: the finished product can be obtained by the method steps of embodiment 1.

Embodiment 3

[0047] In parts by weight: 60 parts of 1250 mesh Yuanmingfen, 60 parts of cornstarch, 6 parts of low-density polyethylene, 6 parts of linear low-density polyethylene, 8 parts of ethylene-vinyl acetate copolymer, 1.2 parts of KH-550, 4 parts of oxidized polyethylene wax parts, 4 parts of polyethylene glycol.

[0048] Method steps: the finished product can be obtained by the method steps of embodiment 1.

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Abstract

The present invention relates to a degradable polyolefin masterbatch and a production method thereof. The components of the degradable polyolefin masterbatch comprise, by weight, 40-80 parts of sodium sulfate, 20-60 parts of starch, 12-18 parts of low density polyethylene and linear low density polyethylene, 4-8 parts of an ethylene-vinyl acetate copolymer, 1-2 parts of a coupling agent, 0.5-3 parts of a photosensitizer, and 2-8 parts of a processing additive. The production method comprises: adding the sodium sulfate and the starch to a high-speed mixer to stir, heating to a temperature of 100 DEG C, and exhausting; adding the coupling agent to continuously stir for 8-12 minutes; finally adding the low density polyethylene, the linear low density polyethylene, the ethylene-vinyl acetate copolymer, the photosensitizer and the processing additive, stirring for 6 minutes, discharging the material to provide a spare use; and carrying out extruding and pelletizing on the spare material through a co-rotating twin screw extruder with a length-diameter ratio of 40 to obtain the finished product. The production method of the present invention has characteristics of simpleness and low cost, and the degradation speed of the thin film can be substantially accelerated with the product masterbatch of the present invention.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a degradable polyolefin masterbatch and a production method. Background technique [0002] With the continuous expansion of the use and consumption of plastics, the waste of agricultural plastics, packaging plastics and various plastic products has become one of the most serious global pollution. At present, there are two main ways to solve waste plastics, one is the recycling of waste plastics, and the other is research on degradable plastics. [0003] In China, due to the low labor force, the industrial chain of recycling thick plastic products occupies a large market, but as the price of labor rises, the industrial advantages of recycling plastics will gradually weaken. For thin plastic products, such as agricultural film and plastic packaging film, due to the high recycling cost and complicated process, it is not feasible in terms of economic benefits. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L3/10C08L3/06C08L23/06C08L23/08C08K3/30C08K13/02C08J3/22C08L23/00
Inventor 何和智
Owner HECHANG GUANGXI CHEM
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