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Polyester fully biodegradable mulch

A biodegradable, polyester technology, applied in the direction of plant protection cover, etc., can solve the problems of difficult production method, difficult to popularize in a large area, poor transparency, etc., and achieves low water vapor transmission rate, good transparency, and good flexibility. Effect

Active Publication Date: 2015-08-05
新疆纳爱斯环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The mulch film reported in CN170395 takes waste cotton, cotton cloth, waste paper, cardboard, etc. as raw materials, and the mulch film mentioned in CN101884292A and CN101712805A uses powdery soil and black humic acid powder as raw materials, and is crushed and kneaded to make and press into mulch film , although the film is completely biodegradable, the production method is difficult, the repeatability is poor, the transparency is poor, the thermal insulation and water retention are poor, and the degradation rate is difficult to control and it is difficult to promote it in a large area
Although CN101565514 and CN102475046A respectively report degradable mulch films made of modified starch or thermoplastic starch, degradable polymer or polyhydrocarbyl fatty acid ester (PHA), the degradable polymer is not further described in the claims, Moreover, the mulch film with starch as the main material also has disadvantages such as poor transparency, poor thermal insulation and water retention, and difficult to control the degradation rate, so it is difficult to popularize.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Mix 40% PBST (melting point 110-120°C, melting index: 3.8), 55% PLA (melting point 160-170°C, melting index: 4.0), 0.5% 2,2′-bis(2-oxazoline), 1 % hydrotalcite (3000 mesh), 1% sodium hydroxymethyl cellulose, 1.5% anti-aging agent [0.5% compound antioxidant (1010 and 168), 0.5% ultraviolet absorber UV-328, 0.5% light stabilizer 622], 0.5% slip agent (0.3% N, N-ethylene bis stearamide, 0.2% oleic acid amide), 0.5% silicon dioxide (10000 mesh), sequentially added to the high-speed mixer, after mixing evenly , added to the parallel twin-screw extruder with an aspect ratio of 48, further plasticized, extruded and granulated to obtain a completely biodegradable film material, and then further blown into a film with a thickness of 0.01mm and a water vapor transmission rate of 13.2g / m 2 *d, the temperature of the soil at a depth of 10cm is 14.9°C 24 hours after filming.

Embodiment 2

[0043] Mix 80% PBS (melting point: 110-120°C, melting index: 5.0), 10% PGA (melting point: 170-180°C, melting index: 4.5), 1.5% 2,2'-(1,3-phenylene) -Bisoxazoline, 2% mica powder (5000 mesh), 2% sodium hydroxypropyl methylcellulose, 0.5% anti-aging agent [0.2% compound antioxidant (1024 and 626), 0.2% ultraviolet absorber UV-P, 0.1% light stabilizer 770], 1% slip agent (0.5% erucamide and 0.5% oxidized PE wax), 3% talcum powder (1000 mesh), add to the high-speed mixer in turn, mix well Finally, add it to a parallel twin-screw extruder with an aspect ratio of 48 to further plasticize, extrude and granulate to obtain a completely biodegradable film material, and then further blown the film with a thickness of 0.01mm and a water vapor transmission rate of 9.8g / m 2 *d, the temperature of the soil at a depth of 10cm is 17.4°C 24 hours after filming.

Embodiment 3

[0045] Mix 70% PBSA (melting point: 100-110°C, melting index: 2.8), 22% PHBV (melting point: 165-175°C, melting index: 5.3), 1% 4,4-dimethyloxazoline, 1.5% Mongolian Soil removal (10000 mesh), 1.5% sodium carboxymethyl cellulose, 1% anti-aging agent [0.4% compound antioxidant (1076 and 168), 0.3% ultraviolet absorber UV-9, 0.3% light stabilizer 944 ], 0.8% slip agent (0.3% zinc stearate and 0.5% PE wax), 2.2% calcium carbonate (5000 mesh), add to the high-speed mixer in turn, after mixing evenly, add to the aspect ratio 48 Further plasticizing, extruding and granulating in the parallel twin-screw extruder to obtain a completely biodegradable film material, and then further blown the film, with a thickness of 0.01mm and a water vapor transmission rate of 11.9g / m 2 *d, the soil temperature at 10cm deep is 15.4°C 24 hours after the film was spread.

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Abstract

The invention relates to a mulch film, in particular to a polyester full-biodegradable mulch film. The polyester full-biodegradable mulch film is prepared from the following raw materials in percentage by mass: 40%-80% of flexible degradable polyester, 10%-55% of rigid degradable polyester, 0.5%-1.5% of a reactive compatibilizing agent, 1%-2% of a heat preservation agent, 1%-2% of a moisturizing agent, 0.5%-1.5% of an ageing-resistant agent, 0.5%-1% of a smooth agent and 0.5%-3% of an anti-block agent. The polyester full-biodegradable mulch film does not contain any non-biodegradable general plastic and starch; the film blowing operation can be performed on a general LDPE (low-density polyethylene) film blowing machine; equipment does not need to be modified; the polyester full-biodegradable mulch film is good in transparency, flexibility and heat preservation property, high in strength, low in water vapor penetration rate and favorable for preserving moisture.

Description

technical field [0001] The invention relates to a mulch film, in particular to a completely biodegradable polyester mulch film. Background technique [0002] In the 1960s, mulching technology emerged and became popular in Japan, Europe and the United States and other countries. Since 1979, plastic film mulching cultivation technology has been vigorously promoted in my country. Today, the area covered by plastic film has reached 210 million mu, and the annual consumption exceeds 1.2 million tons. The popularization and application of plastic film, especially for areas with arid and harsh climate conditions, has played a key role in heat preservation and moisture conservation for crops, resulting in a significant increase in crop yield. Plastic film has gradually become an indispensable production material in agriculture. [0003] At the same time, the soil pollution caused by plastic film residues is also becoming more and more serious. Because ordinary plastic film is too t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L67/04C08K13/02C08K3/22C08K3/36C08K3/34C08K5/134C08K5/25C08K5/526A01G13/02
Inventor 陈景清陈考
Owner 新疆纳爱斯环保科技有限公司
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