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Three-layer composite high-barrier controllable full-biodegradable mulching film and preparation method thereof

A degradable mulch film and high-barrier technology, which is applied in the fields of botany equipment and methods, chemical instruments and methods, plant protection, etc., can solve the problems of low practicability, difficult operation, complex process, etc. for energy saving and consumption reduction, and can achieve degradation time. Control and ensure the effect of barrier performance

Active Publication Date: 2021-01-26
SHANDONG QINGTIAN PLASTIC IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon black is easy to agglomerate and form black spots; using five-layer, seven-layer, and nine-layer co-extrusion molding equipment is not practical from the perspective of energy saving and consumption reduction, and the process is complicated and difficult to operate

Method used

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  • Three-layer composite high-barrier controllable full-biodegradable mulching film and preparation method thereof
  • Three-layer composite high-barrier controllable full-biodegradable mulching film and preparation method thereof
  • Three-layer composite high-barrier controllable full-biodegradable mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] The width of the production film is 1.2 meters, the thickness is 0.008mm, and the service life of the degradable film is required to be 90 days to 105 days.

[0083] The three-layer composite high-barrier controllable fully biodegradable mulch film includes an inner layer, a middle layer and an outer layer, and its specific composition is as follows:

[0084] Outer layer: Degradable mulch life control layer resin is made of the following raw materials in mass percentage:

[0085] PBAT: 88wt.%; PLA: 6wt.%; UV absorber: 2wt.%; light stabilizer: 0.5wt.%; antioxidant: 0.5wt.%; lubricant: 1wt.%; dispersant: 2wt. %.

[0086] After the above raw materials are granulated, each bag is 25Kg, including: PBAT 22Kg; PLA 1.5Kg; ultraviolet absorber 0.5Kg; light stabilizer 0.125Kg; antioxidant 0.125Kg; lubricant 0.25Kg; dispersant 0.5Kg.

[0087] Middle layer: Degradable mulch barrier layer resin is made of the following raw materials in mass percentage:

[0088] PBAT: 87wt.%; PLA:...

Embodiment 2

[0117] The width of the production film is 1.2 meters, the thickness is 0.008mm, and the service life of the degradable film is required to be 105 days to 115 days.

[0118] The three-layer composite high-barrier controllable fully biodegradable mulch film includes an inner layer, a middle layer and an outer layer, and its specific composition is as follows:

[0119] Outer layer: Degradable mulch life control layer resin is made of the following raw materials in mass percentage:

[0120] PBAT: 86.6wt.%; PLA: 7wt.%; UV absorber: 2wt.%; light stabilizer: 0.6wt.%; antioxidant: 0.8wt.%; lubricant: 1wt.%; dispersant: 2wt .%.

[0121] After the above raw materials are granulated, each bag is 25Kg, including: PBAT 21.65Kg; PLA 1.75Kg; ultraviolet absorber 0.5Kg; light stabilizer 0.15Kg; antioxidant 0.2Kg; lubricant 0.25Kg; dispersant 0.5Kg.

[0122] Middle layer: Degradable mulch barrier layer resin is made of the following raw materials in mass percentage:

[0123] PBAT: 87wt.%; ...

Embodiment 3

[0140] The width of the production film is 1.2 meters, the thickness is 0.008mm, and the service life of the degradable film is required to be 115 days to 130 days.

[0141] The three-layer composite high-barrier controllable fully biodegradable mulch film includes an inner layer, a middle layer and an outer layer, and its specific composition is as follows:

[0142] Outer layer: Degradable mulch life control layer resin is made of the following raw materials in mass percentage:

[0143] PBAT: 85.2wt.%; PLA: 8wt.%; UV absorber: 2.2wt.%; light stabilizer: 0.8wt.%; antioxidant: 0.8wt.%; lubricant: 1wt.%; dispersant: 2wt.%.

[0144] After the above raw materials are granulated, each bag is 25Kg, including: PBAT 21.3Kg; PLA 2Kg; ultraviolet absorber 0.55Kg; light stabilizer 0.2Kg; antioxidant 0.2Kg; lubricant 0.25Kg; dispersant 0.5Kg.

[0145] Middle layer: Degradable mulch barrier layer resin is made of the following raw materials in mass percentage:

[0146] PBAT: 87wt.%; PLA...

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Abstract

The invention belongs to the technical field of agricultural film preparation, and particularly relates to a three-layer composite high-barrier controllable full-biodegradable mulching film and a preparation method thereof. The mulching film comprises an inner layer, namely a mulching film slow release layer, a middle layer, namely a mulching film barrier layer, and an outer layer, namely a mulching film service life control layer; the mulching film slow release layer comprises PBAT and PLA; the mulching film barrier layer comprises PBAT, PLA and TPU; and the mulching film service life controllayer comprises PBAT and PLA. The three-layer composite high-barrier controllable full-biodegradable mulching film meets the requirements of farmers for original heat preservation and soil moisture conservation functions of the mulching film, the degradation effect of the mulching film can be controlled within a certain period of time according to the growth requirements of crops, the mulching film can be completely degraded when the crops are harvested, and no pollution is caused to the land environment and soil. The secondary labor cost of the farmers is reduced, and the social secondary pollution is reduced. The preparation method is scientific, reasonable, simple and feasible.

Description

technical field [0001] The invention belongs to the technical field of agricultural film preparation, and in particular relates to a three-layer composite high-barrier controllable fully biodegradable plastic film and a preparation method thereof. Background technique [0002] The area of ​​farmland covered by plastic film in my country has exceeded 13 million hectares, accounting for about 1 / 9 of the country's cultivated land area. Due to the use of agricultural mulch film, the temperature and humidity of the soil are effectively controlled, the loss of water and nutrients is reduced, and the high and stable yield of crops is promoted, thereby increasing the benefits of agricultural production. But at the same time, due to the one-time use of mulch, a large amount of residual mulch remains in the soil every year. Most of these residual mulches are made of polyethylene raw materials, which do not have any degradation properties and will remain for more than 100 years. The ...

Claims

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Application Information

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IPC IPC(8): A01G13/02B32B27/36B32B27/18B32B27/08B32B27/40B32B7/022B32B7/02B32B33/00C08J5/18C08L67/02C08L67/04C08L75/08B29C48/00B29C48/10B29C48/21B29C55/28
CPCA01G13/0275B32B27/36B32B27/18B32B27/08B32B27/40B32B7/022B32B7/02B32B33/00C08J5/18B29C48/0017B29C48/10B29C48/21B29C55/28B32B2250/03B32B2250/40B32B2307/50B32B2307/54B32B2307/7265B32B2307/716B32B2410/00C08J2367/02C08J2467/04C08J2475/08Y02A40/28
Inventor 尹君华国先锋王先政
Owner SHANDONG QINGTIAN PLASTIC IND
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