Reversible thermochromic multifunctional agricultural plastic film at normal temperature and production method thereof

Abstract

The invention discloses a normal-temperature reversible temperature-chromatic multifunctional agricultural film and a production method. The production method comprises the following steps: adding at least one kind of reversible temperature-changing pigment MC powder into polyethylene resin granules to be prepared into an allochromatic master batch, and then blowing the allochromatic master batchby a general agricultural film formulation and a blow molding technology to obtain a normal-temperature reversible temperature-chromatic three-layer composite agricultural film or a single-layer agricultural film preventing ageing and dripping; or adding at least one kind of the reversible temperature-changing pigment MC powder on the basis of colorless common ink to be prepared into temperature-changing ink; and after treating an anti-ageing or anti-dripping film surface by a laser finishing etching method, coating a temperature-chromatic ink thin layer on a substrate film by a silk screen printing method and then thermally pressing an anti-dripping or anti-aging film on the substrate film to obtain the normal-temperature reversible temperature-chromatic three-layer composite agricultural film preventing ageing and dripping. The produced multifunctional reversible temperature-chromatic agricultural film can repeatedly and reversibly change color, light transmission property, heat absorptivity, light reflection property of the agricultural film along with change of environmental temperature conditions, and can be applied to aspects of agriculture, industry, national defense, life,and the like.

Description

technical field

[0001] The invention relates to a normal temperature reversible thermochromic agricultural plastic film and a production method thereof, in particular to a reversible thermochromic film for temperature adjustment, light adjustment, humidity adjustment, weed suppression, aging resistance and liquid resistance at room temperature. The production method of the multifunctional color-changing agricultural film such as drops. technical background

[0002] Agricultural film mainly refers to shed film, mulch film, other film, etc. It plays an irreplaceable role in increasing agricultural production and income, and is an indispensable means of production in today's agricultural production. According to the calculation of the agricultural department, the annual consumption of agricultural films nationwide is 2.444 million tons, of which 1.484 million tons are greenhouse films and 960,000 tons are mulch films. With the development of science and technology and the diff...

Examples

Embodiment 1

[0022] Preparation of anti-aging, anti-droplet, and reversible thermochromic three-layer composite plastic film for agricultural use at room temperature (1)

[0023] (1) Based on the colorless common screen printing ink, add 30% by weight of thermal decolorizing MC powder (029C33T black MC powder, microcapsule particle size is less than 7 microns), then add 1.0% by weight of hindered amine light stabilizer and 3.0% by weight fatty acid polyol lipid anti-droplet agent, stirred and ground in special mixing equipment to make screen printing normal temperature reversible thermochromic ink for standby;

[0024] (2) In 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 1.0% by weight of fatty acid polyol lipid anti-dropping agent, According to the general blow molding process, it is blown into a plastic film (inner layer) with a thickness of 0.006mm and anti-droplet properties.

[0025] (3) Add 1.0% by w...

Embodiment 2

[0031] Preparation of anti-aging, anti-droplet, reversible thermochromic three-layer composite agricultural plastic film at room temperature (2)

[0032] (1) In 100 parts by weight of basic resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 20% by weight of thermal decolorization MC powder (026C31T green MC powder , the microcapsule particle size is less than 7 microns), adding 4% weight portion of polyethylene wax as a dispersant, adding 4% weight portion of fatty acid polyol lipid anti-dropping agent and 2% weight portion of hindered amine light stabilizer, Stir with a high-speed mixer at 2000 rpm for 3 to 5 minutes until fully mixed (add an appropriate amount of white oil), heat to 150°C to 200°C, extrude and granulate to become a reversible thermochromic masterbatch at room temperature;

[0033] (2) Get 3 parts of 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE,...

Embodiment 3

[0037] Preparation of anti-droplet / or anti-aging normal temperature reversible thermochromic agricultural plastic film

[0038] (1) In 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 20% by weight of thermal decolorization MC powder (026C31T rose red Thermal decolorization MC powder, the microcapsule particle size is less than 7 microns), adding 5% by weight of the ordinary sky blue pigment of the color-changing pigment, and simultaneously adding 4% by weight of polyethylene wax as a dispersant, adding 4% of fatty acid polyol fat Anti-droplet agent and 2% hindered amine light stabilizer, after stirring with a high-speed mixer at 2000 rpm for 3 to 5 minutes until fully mixed (add an appropriate amount of white oil), heat to 150 ° C to 200 ° C, Extrusion granulation is normal temperature reversible thermochromic masterbatch;

[0039] (2) Get 100 parts by weight of PE base resin mixture (the ratio ...

technical field

[0001] The invention relates to a normal temperature reversible thermochromic agricultural plastic film and a production method thereof, in particular to a reversible thermochromic film for temperature adjustment, light adjustment, humidity adjustment, weed suppression, aging resistance and liquid resistance at room temperature. The production method of the multifunctional color-changing agricultural film such as drops. technical background

[0002] Agricultural film mainly refers to shed film, mulch film, other film, etc. It plays an irreplaceable role in increasing agricultural production and income, and is an indispensable means of production in today's agricultural production. According to the calculation of the agricultural department, the annual consumption of agricultural films nationwide is 2.444 million tons, of which 1.484 million tons are greenhouse films and 960,000 tons are mulch films. With the development of science and technology and the diff...

Examples

Embodiment 1

[0022] Preparation of anti-aging, anti-droplet, and reversible thermochromic three-layer composite plastic film for agricultural use at room temperature (1)

[0023] (1) Based on the colorless common screen printing ink, add 30% by weight of thermal decolorizing MC powder (029C33T black MC powder, microcapsule particle size is less than 7 microns), then add 1.0% by weight of hindered amine light stabilizer and 3.0% by weight fatty acid polyol lipid anti-droplet agent, stirred and ground in special mixing equipment to make screen printing normal temperature reversible thermochromic ink for standby;

[0024] (2) In 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 1.0% by weight of fatty acid polyol lipid anti-dropping agent, According to the general blow molding process, it is blown into a plastic film (inner layer) with a thickness of 0.006mm and anti-droplet properties.

[0025] (3) Add 1.0% by w...

Embodiment 2

[0031] Preparation of anti-aging, anti-droplet, reversible thermochromic three-layer composite agricultural plastic film at room temperature (2)

[0032] (1) In 100 parts by weight of basic resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 20% by weight of thermal decolorization MC powder (026C31T green MC powder , the microcapsule particle size is less than 7 microns), adding 4% weight portion of polyethylene wax as a dispersant, adding 4% weight portion of fatty acid polyol lipid anti-dropping agent and 2% weight portion of hindered amine light stabilizer, Stir with a high-speed mixer at 2000 rpm for 3 to 5 minutes until fully mixed (add an appropriate amount of white oil), heat to 150°C to 200°C, extrude and granulate to become a reversible thermochromic masterbatch at room temperature;

[0033] (2) Get 3 parts of 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE,...

Embodiment 3

[0037] Preparation of anti-droplet / or anti-aging normal temperature reversible thermochromic agricultural plastic film

[0038] (1) In 100 parts by weight of PE base resin mixed pellets (the ratio of three kinds of polyethylene: 10% HDPE, 50% LDPE, 40% LLDPE), add 20% by weight of thermal decolorization MC powder (026C31T rose red Thermal decolorization MC powder, the microcapsule particle size is less than 7 microns), adding 5% by weight of the ordinary sky blue pigment of the color-changing pigment, and simultaneously adding 4% by weight of polyethylene wax as a dispersant, adding 4% of fatty acid polyol fat Anti-droplet agent and 2% hindered amine light stabilizer, after stirring with a high-speed mixer at 2000 rpm for 3 to 5 minutes until fully mixed (add an appropriate amount of white oil), heat to 150 ° C to 200 ° C, Extrusion granulation is normal temperature reversible thermochromic masterbatch;

[0039] (2) Get 100 parts by weight of PE base resin mixture (the ratio ...