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Biodegradable mulching film and preparation method thereof

A biodegradable, mulching technology, applied in the fields of botanical equipment and methods, plant protection, plant protection cover, etc., can solve the problems of limited wide application and serious brittleness of PLA

Active Publication Date: 2020-11-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the brittleness of PLA is serious, and the impact strength is less than 5KJ / m 2 , which seriously limits its wide application

Method used

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  • Biodegradable mulching film and preparation method thereof
  • Biodegradable mulching film and preparation method thereof
  • Biodegradable mulching film and preparation method thereof

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preparation example Construction

[0029] The raw material for the preparation of the biodegradable film provided by the invention includes polylactic acid (PLA). In some embodiments of the present invention, the polylactic acid has 15 parts, 14 parts, 8 parts or 22 parts by weight. In some embodiments of the present invention, the model of the polylactic acid is 4032D, specifically, polylactic acid 4032D produced by NatureWorks.

[0030] The raw material for the preparation of the biodegradable film provided by the present invention also includes polybutylene adipate-terephthalate (PBAT). In some embodiments of the present invention, the weight parts of the polybutylene adipate-terephthalate is 65 parts, 58 parts or 62 parts. In some embodiments of the present invention, the model of the PBAT is TH801T. In some embodiments, the TH801T is purchased from Xinjiang Lanshan Tunhe Polyester Co., Ltd.

[0031] The preparation raw material of the biodegradable mulch film provided by the present invention also inclu...

Embodiment 1

[0064] The biodegradable mulch film is prepared from raw materials containing the following parts by weight:

[0065]

[0066] The weight average molecular weight of PPC is 3.0×10 5 .

[0067] Preparation:

[0068] 1) Weigh PLA, PBAT (TH801T), PPC, SK-98, isosorbide di-n-hexanoate, ethylene bisstearamide, erucamide, triethylene glycol bis[β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], bis(2,4-di-tert-butylphenyl) propionate] pentaerythritol diphosphite, polysuccinic acid ( 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester and LAK-301, each component was mechanically blended for 5 minutes;

[0069] 2) Add the mixed raw materials into the twin-screw extruder, extrude and granulate to obtain a modified film-forming resin; the conditions for extrusion and granulation are: the set temperature of the twin-screw extruder is: Zone 1: 130 ℃, Zone 2: 160℃, Zone 3: 170℃, Zone 4: 180℃, Zone 5: 180℃, Zone 6: 180℃, Zone 7: 180℃, Zone 8: 180℃, Machine head: 180℃, Scr...

Embodiment 2

[0073] The biodegradable mulch film is prepared from raw materials containing the following parts by weight:

[0074]

[0075] The weight average molecular weight of PPC is 3.0×10 5 .

[0076] Preparation:

[0077] 1) Weigh PLA, PBAT (TH801T), PPC, SK-98, isosorbide di-n-hexanoate, ethylene bisstearamide, erucamide, triethylene glycol bis[β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], bis(2,4-di-tert-butylphenyl) propionate] pentaerythritol diphosphite, polysuccinic acid ( 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol) ester, carbon black and LAK-301, each component was mechanically blended for 5 minutes;

[0078] 2) Add the mixed raw materials into the twin-screw extruder, extrude and granulate to obtain a modified film-forming resin; the conditions for extrusion and granulation are: the set temperature of the twin-screw extruder is: Zone 1: 130 ℃, Zone 2: 160℃, Zone 3: 170℃, Zone 4: 180℃, Zone 5: 180℃, Zone 6: 180℃, Zone 7: 180℃, Zone 8: 180℃, Machine he...

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Abstract

The invention relates to the technical field of biodegradable high polymer materials, in particular to a biodegradable mulching film and a preparation method thereof. The biodegradable mulching film is prepared from the following raw materials in parts by weight: 5-30 parts of polylactic acid, 50 to 80 parts of polybutylene adipate-terephthalate, 10 to 40 parts of polypropylene carbonate, 0.1 to 10 parts of talcum powder, 0.5 to 5 parts of a plasticizer, 0.1 to 2 parts of a lubricant, 0.1 to 1 part of an anti-blocking agent, 0.1 to 1 part of an antioxidant, 0.1 to 1 part of an anti-ultravioletagent, 0.1 to 1 part of a light stabilizer, 0-2 parts of carbon black, and 0.1 to 1 part of nucleating agent. The PLA, the PBAT and the PPC are matched with the plasticizer, so that the biodegradablemulching film has relatively excellent tensile elongation at break and right-angle tear strength, and the tensile strength, the tensile elongation at break and the right-angle tear strength of the finally obtained biodegradable mulching film are relatively excellent under the synergistic effect of the other components.

Description

technical field [0001] The invention relates to the technical field of biodegradable polymer materials, in particular to a biodegradable plastic film and a preparation method thereof. Background technique [0002] Unlike traditional petroleum-based plastics, PLA is polymerized from lactic acid fermented from plant starch. This is a renewable resource and has biodegradable properties, which is of great significance to protecting the environment. In the increasingly tense situation of petroleum energy, the development and research of PLA resin is particularly important. The properties of PLA itself are similar to the general-purpose plastic polypropylene, such as high modulus, high tensile strength and good processability. However, the brittleness of PLA is serious, and the impact strength is less than 5KJ / m 2 , seriously restricting its wide application. [0003] Therefore, in view of the severe brittleness of PLA, researches on modification are being actively carried out ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L69/00C08K5/20C08K5/134C08K5/1535C08K3/34C08K13/02C08J5/18A01G13/02
CPCC08J5/18A01G13/0275C08J2367/02C08J2467/04C08J2469/00C08K5/20C08K5/1345C08K5/1535C08K3/34C08K13/02Y02A40/28
Inventor 张会良王向宇潘宏伟边俊甲贾世玲张也金宝昌韩立晶杨慧丽董丽松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI