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A kind of starch-based degradable agricultural mulch film and preparation method thereof

An agricultural mulching film and starch-based technology, applied in climate change adaptation, plant protection cover, etc., can solve the problems of unsatisfactory processing and application performance, complex processing process, and scale production limitation, and achieve convenient and fast granulation, and no three wastes discharge , low cost effect

Active Publication Date: 2016-06-15
苏州格瑞惠农膜材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsequently, a graft-copolymerized starch plastic was developed that physically or chemically modified the original starch and then grafted and blended with resin. Ideal, such as the invention patent application number 201310365326.X, which discloses starch composition, starch-based film and its preparation method. Although the weight percentage of starch is as high as 90%, due to the use of hydrolytic enzymatic cutting process, there are many processes and high cost. The casting film method is adopted, and the mass production is limited
Similarly, the patent application number 201010191038.3 discloses a composite cross-linked high-amylose corn starch material obtained by grafting and modifying corn starch with epichlorohydrin. Promotion is also limited

Method used

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  • A kind of starch-based degradable agricultural mulch film and preparation method thereof
  • A kind of starch-based degradable agricultural mulch film and preparation method thereof
  • A kind of starch-based degradable agricultural mulch film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step 1) Add 55 kg of corn starch, 1 kg of calcium carbonate with a particle size of 1250 mesh, 12 kg of epoxy-containing silicone acrylic resin, 1 kg of epoxy soybean oil, and polyethylene wax into a 100-liter internal mixer. 1.5 kg of titanium dioxide with a particle size of 1500 mesh and 1.5 kg of titanium dioxide were mixed at 100°C for 1.5 hours, then poured into the double-cone feeder and added to the single-screw granulator, and the temperatures of the three heating zones of the single-screw granulator were 100°C , 110°C, 105°C, the die head temperature is 105°C, after exiting the die head, it enters the air cushion air cooling, and after cooling, it enters the pelletizer to obtain 72 kg of modified corn starch masterbatch.

[0039] Step 2) Mix 20 kg of low-density polyethylene, 7.3 kg of maleic anhydride graft-modified linear low-density polyethylene with a graft rate of 1.5%, and 0.3 kg of photodegradable masterbatch in a mixer before entering the twin-screw ...

Embodiment 2

[0043] Step 1) Add 50 kg of tapioca starch, 2 kg of calcium carbonate with a particle size of 1250 mesh, 13 kg of epoxy-containing silicone acrylic resin, 1.5 kg of epoxy soybean oil, and polyethylene wax into a 100-liter internal mixer. 1.5 kg, 2 kg of titanium dioxide with a particle size of 1250 mesh, banburying at 95°C for 1.5 hours, then pouring it into the double-cone feeder and adding it to the single-screw granulator, the temperature of the three heating zones of the single-screw granulator is 100°C respectively , 105°C, 105°C, the die head temperature is 105°C, after exiting the die head, it enters the air cushion air cooling, and after cooling, enters the pelletizer to obtain 70 kg of modified cassava starch masterbatch.

[0044] Step 2) Mix 24.5 kg of low-density polyethylene, 5 kg of maleic anhydride graft-modified linear low-density polyethylene with a grafting rate of 1.8%, and 0.3 kg of photodegradable masterbatch in a mixer before entering the twin-screw Th...

Embodiment 3

[0048] Step 1) Add 45 kg of potato starch, 2 kg of calcium carbonate with a particle size of 1500 mesh, 10 kg of epoxy-containing silicone acrylic resin, 1 kg of epoxy soybean oil, and polyethylene wax into a 100-liter mixer. 1 kg, 2 kg of titanium dioxide with a particle size of 1250 mesh, mixed at 90°C for 1 hour, then poured into a double-cone feeder and added to the single-screw granulator, the temperature of the three heating zones of the single-screw granulator is 100°C , 105°C, 100°C, the die head temperature is 105°C, after exiting the die head, it enters the air cushion air cooling, and after cooling, it enters the pelletizer to obtain 61 kg of modified potato starch masterbatch.

[0049] Step 2) Mix 25 kg of linear low density polyethylene, 13.5 kg of maleic anhydride grafted modified polyethylene with a grafting rate of 0.7%, and 0.3 kg of photodegradable masterbatch in a mixer and enter the twin-screw granulator Conventional granulation was carried out to obtai...

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Abstract

The invention discloses a starch-based degradable agricultural mulch film and a preparation method thereof. The starch-based degradable agricultural mulch film consists of 100 The following components in parts are mixed and blown into film: vegetable starch 45 ～ 55 parts; calcium carbonate 1 ～ 4 parts; epoxy-containing silicone acrylic resin 10 ～ 15 parts; epoxidized soybean oil 1 ～ 3 parts; polyethylene wax 1 ～ 4 parts; titanium dioxide 1 ～ 3 parts; polyethylene 20 ～ 30 parts; maleic anhydride graft modified polyethylene 5 ～ 15 parts; photodegradable masterbatch 0.3 ～ 1.0 parts; hygroscopic masterbatch 0 ～ 1.5 share. The advantage of the present invention is that it has the same effects of increasing production and moisturizing compared with ordinary polyethylene mulch, and at the same time overcomes the problems of difficult processing, poor mechanical properties and poor water resistance, and its tensile strength can reach 16Mpa Above, the complete degradation time is 3 ～ 6 months.

Description

technical field [0001] The invention belongs to the technical field of an agricultural film material and its preparation, in particular to a starch-based degradable agricultural film and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] Agricultural plastic mulch was adopted in agricultural production in the 1950s. In 1955, Japan first applied it to strawberry production, and then France, Italy, the United States and other countries began to use plastic film in the cultivation of vegetables, strawberries, coffee, tobacco, cotton and other crops. my country introduced agricultural mulch film from Japan in 1978, and it is widely used in domestic crop cultivation. In order to make full use of the production-increasing effect of plastic mulch and eliminate the problems of land fertility decline and environmental pollution caused by plastic mulch, developed countries have successively begun to study degradable mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L23/06C08L51/06C08L33/08C08L43/04C08K3/26C08K5/1515C08K3/22A01G13/02B29C55/28
CPCY02A40/28
Inventor 唐玉邦谢洪德徐磊
Owner 苏州格瑞惠农膜材料科技有限公司