Multi-layer co-extrusion based biodegradable mulch film and preparation method thereof

A biodegradable, multi-layer co-extrusion technology, applied in botany equipment and methods, chemical instruments and methods, lamination, etc. The high cost of mulching film preparation can achieve the effect of improving utilization rate and utilization efficiency, reducing groundwater pollution and increasing interface compatibility

Active Publication Date: 2017-03-22
GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
View PDF3 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process of this type of herbicidal mulch film, the amount of herbicide and other functional auxiliaries is large, and the cost of mulch film preparation is high, and some herbic

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052] Example 1

[0053] Preparation of biodegradable herbicide masterbatch:

[0054] Mix atrazine and sorbitan laurate for 3~5min, activate ultrasonically at 100~500W power for 3~25min; then mix with PBAT and glyceryl monostearate, stir and mix at 600~1200rpm 1 ~5min, the mixing temperature does not exceed 60℃, and extrusion granulation at 110~150℃ to obtain herbicide masterbatch.

[0055] Among them, the mass percentages of the reactants are: PBAT 75%; atrazine 20%; sorbitan laurate 2.5%; and glyceryl monostearate 2.5%.

[0056] Preparation of biodegradable grass weeding film:

[0057] The grass weeding film has a two-layer structure. The upper surface layer consists of 10wt% PLA, 89.7wt% PBAT, 0.1wt% antioxidant, 0.1wt% ultraviolet absorber, 0.1wt% light stabilizer, and lower surface layer. The components are 10wt% PLA, 60wt% PBAT and 30wt% herbicide masterbatch. The melt index of PLA used is 3~5g / 10min; the melt index of PBAT used is 3~5g / 10min.

[0058] The components of each la...

Example Embodiment

[0059] Example 2

[0060] Preparation of biodegradable herbicide masterbatch:

[0061] Mix atrazine and polyoxyethylene lauryl ether for 3~5min, ultrasonically activate at 100~500W power for 3~25min; then mix with PBAT and propylene glycol fatty acid ester, stir and mix at 600~1200rpm for 1~5min, mix The temperature does not exceed 60 DEG C, and extrusion granulation at 110-150 DEG C to obtain herbicide masterbatch.

[0062] Among them, the mass percentage of each reactant is: PBAT 75%; atrazine 10%; polyoxyethylene lauryl ether 5%; propylene glycol fatty acid ester 10%.

[0063] Preparation of biodegradable grass weeding film:

[0064] The grass weeding film has a three-layer structure. The upper surface layer consists of 15wt% PLA, 82wt% PBAT, 1wt% antioxidant, 1wt% ultraviolet absorber, 1wt% light stabilizer, the middle layer is PBAT, and the lower surface The layer composition is 15wt% PLA, 75wt% PBAT and 10wt% herbicide masterbatch. The melt index of PLA used is 3~5g / 10min; the ...

Example Embodiment

[0066] Example 3

[0067] Preparation of biodegradable herbicide masterbatch:

[0068] Mix atrazine and polyoxyethylene (4EO) sorbitan monostearate for 3 to 5 minutes, and ultrasonically activate at 100 to 500 W for 3 to 25 minutes; then mix with PBAT and propylene glycol monostearate, Stir and mix for 1 to 5 minutes at a speed of 600 to 1200 rpm, and the mixing temperature does not exceed 60° C., and extrude and granulate at 110 to 150° C. to obtain a herbicide masterbatch.

[0069] Among them, the mass percentages of the reactants are: PBAT 30%; atrazine 60%; polyoxyethylene (4EO) sorbitan monostearate 5%; propylene glycol monostearate 5%.

[0070] Preparation of biodegradable grass weeding film:

[0071] The grass weeding film has a two-layer structure. The upper surface layer consists of 99.9wt% PBAT and 0.1wt% ultraviolet light absorber, and the lower surface layer consists of 20wt% PLA, 77wt% PBAT and 3wt% herbicide mother. grain. The melt index of PLA used is 3~5g / 10min; the m...

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
Login to view more

PUM

PropertyMeasurementUnit
Melt indexaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of agricultural films and discloses a multi-layer co-extrusion based biodegradable mulch film and a preparation method thereof. The mulch film adopts a two-layer or three-layer structure, wherein an upper surface layer contains 99wt%-99.9wt% of biodegradable resin A and 0.1wt%-1wt% of auxiliaries; a middle layer is the biodegradable resin A; a lower surface layer contains 70wt%-97wt% of the biodegradable resin A and 3wt%-30wt% of biodegradable herbicide master batches; preparation of the master batches comprises steps as follows: 10wt%-60wt% of herbicide is mixed with 0.5wt%-7wt% of a surfactant A with a hydrophilic-lipophilic balance value being 7-10, and an obtained mixture is subjected to ultrasonic activation; an obtained product is mixed with 25wt%-75wt% of biodegradable resin B and 1wt%-10wt% of a surfactant B with a hydrophilic-lipophilic balance value being 3-6 at a high speed, an obtained mixture is subjected to extrusion pelletization, and the herbicide master batches are obtained. A mass ratio of the surfactant A to the surfactant B is 1:1-1:2.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, in particular to a multi-layer co-extruded biodegradable film and a preparation method thereof. Background technique [0002] Weed-killing mulch is a functional mulch product with weed-killing effect prepared by adding herbicides to plastic films. During the use of the mulch film, the herbicide diffuses to the surface of the mulch film to form a herbicidal molecular layer, which dissolves and drips to the ground together with the water droplets attached to the surface of the mulch film, and is absorbed by the soil to form a herbicide treatment layer with a certain concentration, which finally achieves the purpose of inhibiting the growth of weeds, And the purpose of causing weed death. Biodegradable weed-killing mulch film is prepared by mixing herbicide or herbicide masterbatch with fully biodegradable polymer resin with fully biodegradable polymer resin as the carrier. It has the fu...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L67/02C08L67/04C08K9/04C08K5/3492C08K5/103C08J3/22A01G13/02B32B27/06B32B27/36B32B27/18B32B37/15
CPCA01G13/0275B32B27/08B32B27/18B32B27/36B32B37/153B32B2307/552B32B2307/71B32B2307/7163B32B2410/00C08J3/226C08J2367/02C08J2467/02C08L67/02C08L2201/06C08L2201/08C08L2203/16C08L2205/02C08L67/04C08K9/04C08K5/3492C08K5/103
Inventor 陈骏佳谢东陈明周杨友军潘东英张会平高旭华陈东城黄瑶珠
Owner GUANGDONG PROVINCIAL BIOENGINEERING INST (GUANGZHOU SUGARCANE IND RES INST)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap