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High-barrier high-strength ultrathin full-biodegradable mulching film and preparation method

A high-barrier, degradable mulch technology, applied in botanical equipment and methods, plant protection, plant protection covers, etc., can solve the problems of high cost, poor water resistance of PLA, and increased cost, and reduce production and transportation costs. Simple production process and improved moisture retention performance

Active Publication Date: 2019-11-15
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 107365482 A discloses a special reinforcement, toughening and anti-reflection masterbatch for ultra-thin fully biodegradable plastic film. However, this invention does not solve the problem of unsatisfactory moisture retention performance caused by poor barrier properties of biodegradable mulch films, and the PLA has poor water resistance, which is not conducive to the stable growth of mulch films during the growth of crops. Temperature and humidity function
Patent CN 106221165 A discloses a high-barrier fully biodegradable mulch film and its preparation method, and patent CN 108690333 A discloses a high-barrier biodegradable mulch film and its preparation method, both of which use the barrier properties of aliphatic polycarbonate For good materials, poly(butylene adipate-terephthalate) has been blended and modified to improve the barrier properties of mulch products, and the addition ratio does not exceed 40%, but this method introduces more expensive polycarbonate ester, and its compatibility with poly(butylene adipate-terephthalate) has also brought obstacles to the production and processing of mulch, which requires more complicated compositions and processes to solve
None of the above-mentioned inventions can achieve the effect of improving the tear strength and barrier properties of fully biodegradable agricultural mulches without significantly increasing the cost, nor can they significantly reduce the thickness of fully biodegradable mulch films on the basis of performance enhancement. At present, there is no high barrier film. High-strength, relatively low-priced fully biodegradable mulch is marketed

Method used

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  • High-barrier high-strength ultrathin full-biodegradable mulching film and preparation method
  • High-barrier high-strength ultrathin full-biodegradable mulching film and preparation method
  • High-barrier high-strength ultrathin full-biodegradable mulching film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this example, the high-barrier high-strength ultra-thin fully biodegradable mulch film is made of the following components in weight percent:

[0036] PBAT 90.5 parts

[0037] Oxidized polyethylene wax 0.5 parts

[0038] Nano-attapulgite 5.0 parts

[0039] Urea 0.8 parts

[0040] 0.5 parts of oleic acid

[0041] UV stabilizer UV 326 1.5 parts

[0042] Antioxidant B215 1.2 parts

[0043] The high-barrier high-strength fully biodegradable mulch film of this example is prepared by the following steps:

[0044] (1) Mix the degraded masterbatch with various additives: mix the weighed granular PBAT with other components according to the ratio, use a high-speed mixer to mix evenly, the stirring speed is 1200r / min, and the stirring time is 180s;

[0045] (2) Melt blending modified extrusion granulation: Put the mixed materials into the twin-screw extruder, set the temperature of the twin-screw extruder at 175-180°C, the screw speed is 120r / min, and mix well The materi...

Embodiment 2

[0053] In this example, a high-barrier high-strength ultra-thin fully biodegradable mulch film is made of the following components by weight percentage:

[0054] PBAT 87.8 parts

[0055] Low molecular weight polyethylene wax 0.5 part

[0056] Micron talcum powder 10 parts

[0057] Ammonium carbonate 0.5 parts

[0058] Vinyl bis stearamide 0.5 parts

[0059] UV stabilizer UV 326 0.5 parts

[0060] Antioxidant B215 0.2 parts

[0061] The high-barrier high-strength fully biodegradable mulch film of this example is prepared by the following steps:

[0062] (1) Mix the degraded masterbatch with various additives: mix the weighed granular PBAT with other components according to the ratio, use a high-speed mixer to mix evenly, the stirring speed is 1500r / min, and the stirring time is 240s;

[0063] (2) Melt blending modified extrusion granulation: put the mixed materials into the twin-screw extruder, the temperature of the twin-screw extruder is set at 185-195°C, the screw spee...

Embodiment 3

[0070] In this example, a high-barrier high-strength ultra-thin fully biodegradable mulch film is made of the following components by weight percentage:

[0071] PBAT 92.9 parts

[0072] 5 slices of mica

[0073] Modified nanocellulose 0.5 parts

[0074] ADR chain extender 0.1 parts

[0075] Oleic acid amide 0.2 parts

[0076] CHIMASSORB 81 0.8 parts

[0077] Irganox1076 0.5 parts

[0078] The high-barrier high-strength fully biodegradable mulch film of this example is prepared by the following steps:

[0079] (1) Mix the degraded masterbatch with various additives: mix the weighed granular PBAT with other components according to the ratio, use a high-speed mixer to mix evenly, the stirring speed is 3000r / min, and the stirring time is 300s;

[0080] (2) Melt blending modified extrusion granulation: Put the mixed materials into the twin-screw extruder, set the temperature of the twin-screw extruder at 155-170°C, the screw speed is 50r / min, and mix well The material is me...

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Abstract

The invention provides a high-barrier high-strength ultrathin full-biodegradable mulching film and a preparation method. The mulching film is prepared from polyadipic acid-butylene terephthalate as amain body material, and is prepared from the following components in parts by weight: 60-99.7 parts of the main body material, 0.1-30 parts of a barrier property enhancing agent, 0.1-3 parts of a tearing resistance enhancing agent, 0.1-5 parts of a lubricant, 0-2 parts of a light stabilizer, 0-2 parts of an antioxidant and 0-5 parts of a color master batch, wherein the tearing resistance enhancingagent is selected from one or more of polyphosphates, diisopropylbenzene peroxide, an ADR chain extender, KH560, KH570, urea, carbonate, bicarbonate, ammonium salt, an organic amine compound, anhydride and calcium stearate; and the barrier property enhancing agent is an organic barrier property enhancing agent, an inorganic barrier property enhancing agent or a compound of the organic barrier property enhancing agent and the inorganic barrier property enhancing agent. The full-biodegradable agricultural mulching film provided by the invention achieves high tearing strength and high barrier performance with low cost, has the value of large-scale popularization and has great marketization significances.

Description

technical field [0001] The invention relates to the field of degradable materials, in particular to a high-barrier, high-strength ultra-thin fully biodegradable plastic film and a preparation method thereof. Background technique [0002] my country is a big agricultural country, and it is also the country with the largest amount of plastic film in the world. Since the introduction of agricultural mulch film into my country in the late 1980s, its important functions of moisture conservation, temperature increase, and weed prevention have made great contributions to increasing agricultural production and income in my country. However, waste mulch remains in nature and is difficult to degrade easily. Therefore, for more than 30 years, the "white revolution" of that year has caused serious "white pollution". It is urgent to carry out the prevention, control and comprehensive treatment of mulch residual pollution. Under the premise that plastic film mulching technology cannot be...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/30C08L23/06C08L1/02C08L91/06C08K13/02C08K3/34C08K5/21C08K5/09C08K3/26C08K5/20C08K13/04C08K7/00C08K5/053C08J5/18A01G13/02
CPCA01G13/0275C08J5/18C08J2367/02C08J2401/02C08J2423/06C08J2423/30C08J2491/06C08K3/26C08K3/346C08K5/053C08K5/09C08K5/20C08K5/21C08K7/00C08K13/02C08K13/04C08K2201/011Y02A40/28
Inventor 刘琪何文清
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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