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Degradable agricultural film

An agricultural film and polyvinyl alcohol technology, which is applied in the field of degradable agricultural films, can solve the problems of reducing sunlight transmittance, delaying crop growth, low material degradability, etc. Effect

Inactive Publication Date: 2017-10-17
JIESHOU JINGHUA TECH INFORMATION CONSULTING SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, transparent resin materials, inorganic glass and other materials are used in agricultural greenhouses and agricultural greenhouses, which have the following disadvantages: when the surface temperature is below the dew point of its environment, sometimes fog will be generated due to the attachment of fine water droplets, If fog is generated, the transmittance of sunlight will be reduced due to the reduction of transparency, which will have adverse effects such as delaying crop growth. In addition, the materials used in agricultural greenhouses in the prior art have low degradability and are discarded. cause great harm to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A degradable agricultural film, comprising the following processes:

[0021] (1) Nano-Al 3+ / TiO 2 Modified polyvinyl alcohol, esterified starch, plasticizer and water are mixed in a mass ratio of 78:6:1:15 and then stirred at 200 r / min at a temperature of 50°C to obtain a mixed material;

[0022] (2) Add the mixed material to a twin-screw extruder to extrude into a uniform transparent sol;

[0023] (3) casting the sol into a film on a rotary drum casting machine;

[0024] (4) After drying, cooling, trimming, and winding, a degradable agricultural film can be obtained.

[0025] The nano-Al 3+ / TiO 2 Modified polyvinyl alcohol preparation method is:

[0026] (1) Preparation of nano-Al 3+ / TiO 2 Composite particles: weigh Al(NO 3 ) 3 with nano TiO 2 Mixed into a mixture, the weight of the mixture is 8 parts, fully dissolved and mixed in 50 parts by weight of deionized water, so that Al 3+ The molar ratio of TiO / TiO2 is 0.035:1, then stirred at 500r / min for 24h...

Embodiment 2

[0034] A degradable agricultural film, comprising the following processes:

[0035] (1) Nano-Al 3+ / TiO 2 Modified polyvinyl alcohol, esterified starch, plasticizer and water are mixed in a mass ratio of 85: 10: 2: 20 and then stirred at 200 r / min at a temperature of 50 ° C to obtain a mixed material;

[0036] (2) Add the mixed material to a twin-screw extruder to extrude into a uniform transparent sol;

[0037](3) casting the sol into a film on a rotary drum casting machine;

[0038] (4) After drying, cooling, trimming, and winding, a degradable agricultural film can be obtained.

[0039] The nano-Al 3+ / TiO 2 Modified polyvinyl alcohol preparation method is:

[0040] (1) Preparation of nano-Al 3+ / TiO 2 Composite particles: weigh Al(NO 3 ) 3 with nano TiO 2 Mixed into a mixture, the weight of the mixture is 8 parts, fully dissolved and mixed in 60 parts by weight of deionized water, so that Al 3+ The molar ratio of TiO / TiO2 is 0.035:1, then stirred at 500r / min fo...

Embodiment 3

[0048] A degradable agricultural film, comprising the following processes:

[0049] (1) Nano-Al 3+ / TiO 2 Modified polyvinyl alcohol, esterified starch, plasticizer and water are mixed in a mass ratio of 80:8:1:18 and then stirred at 200 r / min at a temperature of 50°C to obtain a mixed material;

[0050] (2) Add the mixed material to a twin-screw extruder to extrude into a uniform transparent sol;

[0051] (3) casting the sol into a film on a rotary drum casting machine;

[0052] (4) After drying, cooling, trimming, and winding, a degradable agricultural film can be obtained.

[0053] The nano-Al 3+ / TiO 2 Modified polyvinyl alcohol preparation method is:

[0054] (1) Preparation of nano-Al 3+ / TiO 2 Composite particles: weigh Al(NO 3 ) 3 with nano TiO 2 Mixed into a mixture, the weight of the mixture is 8 parts, fully dissolved and mixed in 55 parts by weight of deionized water, so that Al 3+ The molar ratio of TiO / TiO2 is 0.035:1, then stirred at 500r / min for 24h...

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Abstract

The invention discloses a degradable agricultural film and relates to the technical field of agricultural films. The degradable agricultural film comprises the following steps: (1) mixing nano Al<3+> / TiO2 modified polyvinyl alcohol, esterified starch, a plasticizer and water, and uniformly stirring so as to obtain a mixed material; (2) putting the mixed material into a double-screw extruder, and performing extrusion so as to obtain transparent gel; (3) performing curtain coating filming on a rotary drum curtain coating machine; (4) performing drying, cooling, trimming and coiling, thereby obtaining the degradable agricultural film. The degradable agricultural film disclosed by the invention is good in water resistance and high in biodegradability.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, in particular to a degradable agricultural film. Background technique [0002] Agricultural film is a general term for plastic films used in agricultural production. It plays a very important role in moisturizing and heat preservation during the sowing period, and can also be used in agricultural greenhouses. At present, transparent resin materials, inorganic glass and other materials are used in agricultural greenhouses and agricultural greenhouses, which have the following disadvantages: when the surface temperature is below the dew point of its environment, sometimes fog will be generated due to the attachment of fine water droplets, If fog is generated, the transmittance of sunlight will be reduced due to the reduction of transparency, which will have adverse effects such as delaying crop growth. In addition, the materials used in agricultural greenhouses in the prior art have low ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/06C08K3/22C08K5/103C08F8/30C08F16/06C08B31/04B29D7/01
CPCB29D7/01C08B31/04C08F8/30C08J5/18C08J2329/04C08J2403/06C08K2003/2241C08K2201/011C08L29/04C08L2201/06C08L2203/16C08L2312/00C08L3/06C08K3/22C08K5/103C08F16/06
Inventor 尚圣杰
Owner JIESHOU JINGHUA TECH INFORMATION CONSULTING SERVICE CO LTD
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