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Controlled degradation type full-biodegrade agricultural mulching film

An agricultural mulch and all-biological technology, applied in plant protection covers, climate change adaptation, etc., can solve the problems of difficult control, degradable mulch, degradation induction period, and difficulty in adapting to demand, etc., to achieve reasonable design, good comprehensive performance of mulch, The effect of meeting the requirements of degradation time

Active Publication Date: 2014-10-01
HANGZHOU XINFU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102660068A discloses a controllable photothermal degradation plastic film for sugarcane. By introducing a photosensitizer and a thermal degradation accelerator, it solves the problems that the degradation plastic film is difficult to degrade and the degradation induction period is difficult to control after it enters the soil, and meets the requirements of sugarcane growth.
Difficult to adapt to the needs of different crops in different regions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 80% PBAT (melt index 3.5g / 10min), 10% PGA (melt index 5.1g / 10min), 0.6% calcium stearate, 0.7% talc, 0.4% composite antioxidant [1010, 168 and triphosphate Phenyl esters (1:2:3)], 1% montmorillonite, 1% sorbitol, 1% hydrotalcite, 0.15% UV-531, 0.15% light stabilizer 622, 2% stearic acid and 3% oil The acid is sequentially added into the high-speed mixer, and after uniform mixing, it is extruded and granulated by a parallel twin-screw extruder with an aspect ratio of 42 to obtain a fully biodegradable modified agricultural mulching material. Further blown film, the thickness is 0.012mm, and the width is 900mm. In March of the lunar calendar, the film was laid on the corn field. After 80 days, the film began to have holes, and after 110 days, it entered the big cracking stage. After 170 days, no obvious mulch fragments were seen.

Embodiment 2

[0031] 70% PBST (melt index 4.2g / 10min), 10% PBS (melt index 4.8g / 10min), 3% polyethylene wax, 2% diatomaceous earth, 0.5% composite antioxidant [1076, 626 and triphosphate Methyl ester (1:3:5)], 4% mica, 6% amino acid, 1% UV-327, 1% light stabilizer 944 and 2.5% lactic acid were added to the high-speed mixer in turn, and after mixing evenly, the ratio of length to diameter was 42 parallel twin-screw extruder extruded and granulated to obtain fully biodegradable modified agricultural mulch film. Further blown film, the thickness is 0.012mm, and the width is 900mm. In April, the film was laid on the tobacco ground, and the film began to have holes after 40 days, and entered the big cracking stage after 60 days. After 160 days, no obvious mulch fragments were seen.

Embodiment 3

[0033]65% PBSA (melt index 5.1g / 10min), 13%PHA (melt index 2.1g / 10min), 4% paraffin, 1% silicon dioxide, 0.5% composite antioxidant [1098, 627 and triethyl phosphate (1:2:4)], 5% glass microspheres, 5% sodium hydroxyethyl starch, 1% UV-326, 1% light stabilizer 770 and 4.5% erucamide were added to the high-speed mixer in sequence, and mixed evenly Finally, it is extruded and granulated by a parallel twin-screw extruder with an aspect ratio of 42 to obtain a fully biodegradable modified agricultural mulch film. Further blown film, the thickness is 0.010mm, and the width is 900mm. In October, the film began to be laid in the vegetable greenhouse. After 30 days, the film began to have holes, and after 50 days, it entered the big cracking stage. After 140 days, no obvious mulch fragments were seen.

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Abstract

The invention discloses a controlled degradation type full-biodegrade agricultural mulching film, belonging to the technical field of agricultural mulching films. The full-biodegrade agricultural mulching film comprises the following raw materials by weight percent: 0.5%-50% of a processing aid A, 0.1%-0.5% of a processing aid B, 2%-10% of a functional aid A, 0.3%-2% of a functional aid B, 0.1%-5% of a functional aid C and the balance of full-biodegrade polyester. The full-biodegrade agricultural mulching film is reasonable in design, and the stiffness of the mulching film is kept by compounding flexible full-biodegrade resin with rigid full-biodegradable resin; good physical performance of the mulching film is ensured by reasonably combining various aids with full-biodegrade polyester; in addition, the mulching film does not contain non-biodegradable resin, is good in comprehensive performance, can meet the requirements on the degradation time caused by crops, and cannot affect subsequent farm operation after being degraded.

Description

technical field [0001] The invention belongs to the technical field of agricultural mulch, and in particular relates to a fully biodegradable agricultural mulch with controllable degradation. Background technique [0002] In the early 1950s, Japan was the first to popularize and apply plastic film mulching cultivation technology in the early 1950s, and my country introduced this technology from Japan in 1978. The application of plastic film mulching cultivation technology has greatly increased the yield of crops and promoted the development of agriculture in my country. Therefore, the use of plastic film is called a "white revolution" in agricultural production. The mulching of plastic film makes the planting area move northward by 3 to 5 latitudes, generally increasing the crop yield by 30% to 50%, and increasing the value by 40% to 60%. [0003] In 1981, the area covered by crops in my country was only 225,000 mu, and in 2011 it reached about 350 million mu, about 1,550 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L69/00C08K13/02C08K3/26C08K3/34C08K3/36C08K5/098C08K5/523C08K5/521C08K5/09C08K5/20A01G13/02
CPCY02A40/28
Inventor 杨科戴清文王青青殷宏军俞利生
Owner HANGZHOU XINFU TECH CO LTD
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