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Full-biodegradable mulching film with controllable degradation period and preparation method thereof

A technology of degrading mulch film and degradation cycle, applied in the fields of botanical equipment and methods, plant protection, plant protection cover, etc. Excellent water vapor barrier properties, improved mechanical properties, and improved moisture retention properties

Inactive Publication Date: 2021-01-29
LANZHOU XINYINHUAN RUBBER & PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water vapor transmission rate of the fully biodegradable mulch film is high, and the induction period is long, which cannot meet the needs of various plant cultivation.

Method used

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  • Full-biodegradable mulching film with controllable degradation period and preparation method thereof
  • Full-biodegradable mulching film with controllable degradation period and preparation method thereof
  • Full-biodegradable mulching film with controllable degradation period and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a fully biodegradable mulch film with controllable degradation cycle. The raw materials include the following components in parts by weight:

[0032]

[0033] The preparation method comprises steps:

[0034] (1) Polybutylene adipate / terephthalate, high crystallinity polylactic acid, polybutylene succinate, modified polyamidoamine, sorbitol, polyethylene wax and ethylene butyl acrylate The grafted glycidyl methacrylate is stirred and mixed evenly, then calcium carbonate, antioxidant 246, ultraviolet absorber is UV531 and light stabilizer 944 are added, and stirring is continued for 5 minutes to obtain a mixture;

[0035] (2) The mixed material is melted and blended and extruded by a parallel reverse twin-screw extruder to obtain a modified material;

[0036] (3) The obtained modified material was blown into film at 175° C. by a film blowing machine to obtain a fully biodegradable mulch film with a thickness of 10 μm and a controllable period....

Embodiment 2

[0039] This embodiment provides a fully biodegradable mulch film with controllable degradation cycle. The raw materials include the following components in parts by weight:

[0040]

[0041]

[0042] The preparation method comprises steps:

[0043] (1) Polybutylene adipate / terephthalate, high crystallinity polylactic acid, polybutylene succinate, modified polyamide-amine, sorbitol, ethylene oxide wax and ethylene butyl acrylate Stir and mix the grafted glycidyl methacrylate evenly, then add calcium carbonate, antioxidant 246, antioxidant 168, ultraviolet absorber UV-P and light stabilizer 944, and continue stirring for 5 minutes to obtain a mixture;

[0044] (2) The mixed material is melted and blended and extruded by a parallel reverse twin-screw extruder to obtain a modified material;

[0045] (3) The obtained modified material was blown into film at 175° C. by a film blowing machine to obtain a fully biodegradable mulch film with a thickness of 10 μm and a controllable...

Embodiment 3

[0048] This embodiment provides a fully biodegradable mulch film with controllable degradation cycle. The raw materials include the following components in parts by weight:

[0049]

[0050]

[0051] The preparation method comprises steps:

[0052] (1) React ethylene bisstearamide, titanium salt and 1 / 2 ethylene oxide wax at 80°C for 40 minutes, regulator, and set aside;

[0053] (2) Polybutylene adipate / terephthalate, high crystallinity polylactic acid, polybutylene succinate, modified polyamide-amine, polyglycerol, ethylene oxide wax and ethylene butyl acrylate Stir and mix the grafted glycidyl methacrylate evenly, then add calcium carbonate, antioxidant 246, antioxidant 1076, ultraviolet absorber 234 and light stabilizer 770, and continue stirring for 5 minutes to obtain a mixture;

[0054] (3) The mixed material is melted and blended and extruded by a parallel reverse twin-screw extruder to obtain a modified material;

[0055] (4) The obtained modified material was...

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Abstract

The invention discloses a full-biodegradable mulching film with a controllable degradation period and a preparation method thereof. Raw materials for preparing the mulching film comprise the followingcomponents in parts by weight: 40-60 parts of polyadipic acid / butylene terephthalate, 5-20 parts of high-crystallinity polylactic acid, 5-15 parts of polybutylene succinate, 2-10 parts of modified polyamidoamine, 2-6 parts of aliphatic polyol, 5-20 parts of inorganic filler, 1-5 parts of compatilizer, 1-2.5 parts of dispersing agent, 0.1-2 part of antioxidant, 0.1-5 part of ultraviolet light absorber, 0.1-3 part of a light stabilizer, and 0-0.5 part of an auxiliary agent. By selecting high-crystallinity polylactic acid with good air tightness, the air tightness of the mulching film can be effectively improved, degradation of the mulching film can be accelerated by adding modified polyamidoamine into a polymer, and degradation of the mulching film can be accelerated by adjusting the typesand the use amounts of the antioxidant, the ultraviolet light absorber and the light stabilizer as well as the dispersing agent and the auxiliary agent. The degradation time of the full-biodegradablemulching film can be regulated and controlled, and the growth requirements of different altitudes, different regions and different crops can be met.

Description

technical field [0001] The invention relates to the technical field of agricultural materials, in particular to a fully biodegradable plastic film with a controllable degradation cycle and a preparation method thereof. Background technique [0002] Mulch film is of great significance in agricultural production. It not only has the functions of moisturizing, water retention, insect repelling, and weed suppression, but also can improve the water utilization rate of plants and improve the growth environment of crops. However, while the wide application of plastic film brings benefits, it also has an irreversible impact on the soil, especially ordinary plastic film, which can remain in the soil for a long time without degrading, and the residue of plastic film in the soil affects the upward and downward movement of water in the soil , It also affects the activities of microorganisms in the soil, and causes soil compaction after years of accumulation. To solve the residual film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L79/02C08L51/06C08K13/02C08K5/053C08K3/26C08J5/18A01G13/02
CPCC08J5/18A01G13/0275C08J2367/02C08J2467/04C08J2467/02C08J2479/02C08J2451/06C08K13/02C08K5/053C08K2003/265Y02A40/28
Inventor 余彩芬秦文生秦体文汪海燕
Owner LANZHOU XINYINHUAN RUBBER & PLASTIC PROD CO LTD
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