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Degradable two-color mulching film

A two-color mulch, silver-colored technology, applied in plant protection, application, climate change adaptation, etc., can solve the problems of not having two-color mulch, affecting crop growth, destroying soil structure, etc., to increase the intensity of photosynthesis, good promotion prospects, increase The effect of soil fertility

Inactive Publication Date: 2019-09-24
HENAN YINFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the popularization of plastic film mulching technology, a large number of plastic film residues not only damage the soil structure, affect the growth of crops, but also have a great impact on environmental pollution. "White pollution" is becoming more and more prominent
[0003] CN201810612358.8 reported that the degradable film made of 30-50% polyethylene, other polycarbonate, plant fiber, etc. as the main material has a certain degradation function, but because it contains polyethylene resin, it is difficult to completely degraded in soil
CN108299810A describes a degradable mulching film prepared with polylactic acid as the main raw material, which adopts the pressing film forming method, but does not have the advantages of two-color mulching film

Method used

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  • Degradable two-color mulching film
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  • Degradable two-color mulching film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] inner layer:

[0032] PBAT: 68%, PLA: 26%, black masterbatch 4%, PPA masterbatch 2%;

[0033] Middle:

[0034] PBAT: 62%, PLA: 35%, black masterbatch 1%, PPA masterbatch 2%;

[0035] Outer layer:

[0036] PBAT: 64%, PLA: 29%, silver masterbatch 4%, PPA masterbatch 3%;

[0037] The PBAT is a fully biodegradable material produced by Guangzhou Jinfa Company, the PLA is a degradable material produced by BASF, and the black or silver masterbatch is a color masterbatch prepared with PBAT as the main base material.

[0038] According to the above formula, after the outer layer, middle layer and inner layer formula are measured, they are mixed evenly, respectively added to the hopper, melted and extruded through a multi-layer co-extruder, and the melting temperature is set at 170 ° C, and then enters the annular co-extrusion die The three-layer film is extruded from the die head, and the compressed air is blown in from the cooling air duct in the center of the die head to b...

Embodiment 2

[0040] inner layer:

[0041] PBAT: 60%, PLA: 35%, black masterbatch 4%, PPA masterbatch 1%;

[0042] Middle:

[0043] PBAT: 60%, PLA: 35%, black masterbatch 2%, PPA masterbatch 3%;

[0044] Outer layer:

[0045] PBAT: 60%, PLA: 35%, silver masterbatch 4%, PPA masterbatch 1%;

[0046] The PBAT is a fully biodegradable material produced by Guangzhou Jinfa Company, the PLA is a degradable material produced by BASF, and the black or silver masterbatch is a color masterbatch prepared with PBAT as the main base material.

[0047] According to the above formula, after the outer layer, middle layer and inner layer formula are measured, they are mixed evenly, respectively added to the hopper, melted and extruded through a multi-layer co-extruder, the melting temperature is set at 175 ° C, and then enters the ring co-extrusion die The three-layer film is extruded from the die head, and the compressed air is blown in from the cooling air duct in the center of the die head to blow the...

Embodiment 3

[0049] inner layer:

[0050] PBAT: 60%, PLA: 34%, black masterbatch 3%, PPA masterbatch 3%;

[0051] Middle:

[0052] PBAT: 63%, PLA: 33%, black masterbatch 2%, PPA masterbatch 2%;

[0053] Outer layer:

[0054] PBAT: 68%, PLA: 26%, silver masterbatch 4%, PPA masterbatch 2%;

[0055] The preparation process is the same as in Example 2.

[0056] The indicators of the degradable two-color mulch film prepared in Example 1-3 were tested with reference to the GB13735-2017 polyethylene blown agricultural ground cover film standard. After testing, all indicators were better than the national standard. The test results are shown in Table 1, Table 2, table 3.

[0057] Table 1

[0058]

[0059] Table 2

[0060]

[0061] table 3

[0062]

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Abstract

The invention discloses a degradable two-color mulching film, and belongs to the field of agricultural mulching film application. According to the degradable two-color mulching film, PBAT and PLA in different proportions are adopted as main materials of the inner, middle and outer layers, silver master batches are added in the outer layer, black master batches are added in the inner and middle layers, three layers of thin films are extruded out by a co-extrusion die head, and the degradable two-color mulching film is prepared. The degradable two-color mulching film can not only have the weeding and yield increasing functions of two-color mulching films but also be automatically degraded after use, the soil fertility is improved, and the environmental pollution of the mulching film is eliminated.

Description

technical field [0001] The invention relates to a degradable two-color mulching film, relates to the preparation of a degradable two-color mulching film by using fully biodegradable raw materials and other additives as base materials, and belongs to the application field of agricultural mulching films. Background technique [0002] Mulch film is widely used in agricultural production because of its good effect of increasing temperature and keeping moisture; while the outer layer of two-color mulch film is silver or white, and the inner layer is black or gray, which has both weeding function and heat preservation effect, and the outer layer is white or white. Silver can reflect sunlight well and promote crop growth. However, with the popularization of plastic film mulching technology, a large number of plastic film residues not only damage the soil structure and affect the growth of crops, but also have a great impact on environmental pollution. "White pollution" is becoming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/02C08L67/02C08L67/04C08L27/20C08J5/18B32B27/36B32B27/18B32B27/20B32B27/08
CPCA01G13/0275B32B27/08B32B27/18B32B27/20B32B27/36B32B2250/03B32B2250/244B32B2307/416B32B2307/716C08J5/18C08J2367/02C08J2427/20C08J2467/04Y02A40/28
Inventor 李永勃孙美菊陈振富雷鹏赵建国唐国强
Owner HENAN YINFENG PLASTIC
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