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Light degradation PE membrane and preparation method thereof

A photodegradation and photosensitive technology, applied in the field of photodegradation PE film and its preparation, can solve the problems of limited degradation speed, high production cost and high price, and achieve the effect of rapid degradation, favorable growth and complete degradation

Active Publication Date: 2019-08-09
福建富一锦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of mulch film mainly relies on biodegradation, the degradation rate is limited, and the fully biodegradable polyester adopts polylactic acid (PLA), polyadipate / butylene terephthalate (PBAT), polybutylene succinate (PBS) and other special polyester materials, the price was originally higher than that of conventional mulch film raw material polyethylene, so the production cost is higher

Method used

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  • Light degradation PE membrane and preparation method thereof
  • Light degradation PE membrane and preparation method thereof
  • Light degradation PE membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare photodegradable PE film, comprise the following steps: take raw material according to table 1, wherein photosensitive masterbatch is composed as follows: 1wt% diatomite (particle size is 100nm-500nm), 20wt% iron stearate and 79wt% polyvinyl alcohol ( The relative molecular mass is 130,000-140,000, and the density is 1.28-1.30g / cm 3 ).

[0026] The raw materials are put into a single-layer film blowing machine, extruded by a screw at 160°C, blown in a mold at 168°C, cooled, pulled by a wheel, trimmed, wound and packaged to obtain the photodegradable PE film.

[0027] Table 1 raw material consumption table / wt%

[0028]

Embodiment 2

[0030] Prepare photodegradable PE film, comprise the following steps: take raw material according to table 1, wherein photosensitive masterbatch is composed as follows: 2wt% diatomite (particle size is 100nm-500nm), 20wt% iron stearate and 78wt% polyvinyl alcohol ( The relative molecular mass is 130,000-140,000, and the density is 1.28-1.30g / cm 3 ).

[0031] Put each raw material into a single-layer blown film machine, extrude through a screw at 150°C, inflate in a grinding tool at 168°C, cool, roll, trim, wind and pack to obtain the photodegradable PE film.

Embodiment 3

[0033] Prepare photodegradable PE film, comprise the following steps: take raw material according to table 1, wherein photosensitive masterbatch is composed as follows: 2wt% diatomite (particle size is 100nm-500nm), 20wt% zinc stearate and 78wt% polyvinyl alcohol ( The relative molecular mass is 130,000-140,000, and the density is 1.28-1.30g / cm 3 ).

[0034] Put each raw material into a single-layer blown film machine, extrude through a screw at 155°C, inflate in a grinding tool at 170°C, cool, roll, trim, wind and pack to obtain the photodegradable PE film.

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Abstract

The invention relates to a light degradation PE membrane and a preparation method thereof. The light degradation PE membrane is prepared from, by mass, 55-80% of high-pressure low-density polyethylene, 19-42% of linear low-density polyethylene and 0.01-3% of a photosensitive master batch, during preparation, a membrane blowing technology is adopted, and the processing temperature is less than or equal to 175 DEG C. The method comprises the specific preparation steps that all the raw materials are added into a single-layer membrane blowing machine, extruded out through a screw at 145-165 DEG Cand blown up in a grinding apparatus at 165-175 DEG C, and through cooling, rolling by a traction wheel, edge splitting, rolling and packaging, the light degradation PE membrane is obtained. The lightdegradation PE membrane is high in degradation speed in specific ultraviolet light sections and can be hermetically stored for a long time in a natural environment, after 150 days of natural aeration, the PE membrane can form small pieces or fragments, and the small pieces or the fragments can be taken as a farmland fertilizer and are beneficial for sowing and growth of crops.

Description

technical field [0001] The invention relates to a production technology of a degradable plastic film, in particular to a photodegradable PE film and a preparation method thereof. Background technique [0002] Mulch film is used for ground covering to increase soil temperature, maintain soil moisture, maintain soil structure, prevent pests from invading crops and diseases caused by certain microorganisms, etc., and promote plant growth. It is currently widely used in agricultural planting. The mulch film is usually made of PE material. Due to its large amount of use, the number of reusable times is limited, and the PE material itself is difficult to degrade, so a large amount of plastic waste is generated. [0003] Degradable PE film uses physical or chemical means to make the film self-degradable, thereby solving the problem of plastic accumulation in plantations. The existing degradable PE film takes a long time to degrade, has a short storage time, and its performance dec...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08L29/04C08K5/098C08K3/34C08J5/18B29C55/28
CPCC08J5/18B29C55/28C08J2323/06C08J2423/08C08J2429/04C08K5/098C08K3/34B29K2023/0625B29K2023/0633
Inventor 黄作团黄家辉
Owner 福建富一锦科技有限公司
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