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Coating-type light conversion film and preparation method thereof

A light-converting film and coating technology, which is applied in the fields of botanical equipment and methods, chemical instruments and methods, and coatings, can solve the problems affecting the growth and final yield of crops in the greenhouse, and the loss of light, heat and temperature of crops in the greenhouse. environment, reducing the use of pesticides and chemical fertilizers, etc., to achieve the effect of shortening the growth period of crops, prolonging the service life and use value, and reducing the use of pesticides

Inactive Publication Date: 2013-01-02
TIANJIN TIANSU SCI & TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional internally added agricultural film has no photoconversion performance, and cannot excite and convert harmful light waves and some invalid light waves in the spectrum into light waves that are beneficial to crop photosynthesis and growth, thus affecting the photosynthesis intensity of crops, failing to achieve high yields and shortening crop growth. long-term and reduced use of pesticides and fertilizers
At the same time, when the film is in use, the surface of the film is extracted by water droplets in the shed, and the dripping agent and anti-fogging agent molecules added to the film continue to migrate to the surface of the film and lose with the water droplets, thus gradually losing the anti-fog performance of dripping
The traditional internal-added agricultural film dripping anti-fog lasts for only 6-8 months, which is out of sync with the service life of the agricultural film. With the loss of the optical properties of the agricultural film, the crops in the shed lose the light they depend on for growth. , heat and temperature environment, seriously affect the growth and final yield of crops in the greenhouse, resulting in problems such as loss of use value of the film

Method used

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  • Coating-type light conversion film and preparation method thereof
  • Coating-type light conversion film and preparation method thereof
  • Coating-type light conversion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A coating-type light conversion film, which includes a four-layer structure of an inner layer, a middle layer, a sub-outer layer and an outer layer. The layered structure of the film from the inside to the outside is as follows: the inner layer is a mechanical property layer, and the middle layer is a high-strength layer. The thermal insulation and light conversion layer, the second outer layer is a coating carrier layer, and the outer layer is a thin film coating layer.

[0051] The inner layer and sub-outer layer include 7.5-12.5% ​​long-life multifunctional masterbatch, the middle layer includes 7.5-12.5% ​​high-efficiency light-changing longevity masterbatch containing high-strength nanometer multi-band light-changing agent, and the base material is 87.5-92.5%. in,

[0052] 1. Longevity multifunctional masterbatch formula (parts by weight):

[0053]

[0054] Heat the high-speed internal mixer to 130-140°C, add low-density polyethylene, dispersant, inorganic ult...

Embodiment 2

[0067] A coating-type light conversion film, which includes a four-layer structure of an inner layer, a middle layer, a sub-outer layer and an outer layer. The layered structure of the film from the inside to the outside is as follows: the inner layer is a mechanical property layer, and the middle layer is a high-strength layer. The thermal insulation and light conversion layer, the second outer layer is a coating carrier layer, and the outer layer is a thin film coating layer.

[0068] The inner layer and sub-outer layer include 7.5-12.5% ​​long-life multifunctional masterbatch, the middle layer includes 7.5-12.5% ​​high-efficiency light-changing longevity masterbatch containing high-strength nanometer multi-band light-changing agent, and the base material is 87.5-92.5%. in,

[0069] 1. Longevity multifunctional masterbatch formula (parts by weight):

[0070]

[0071] 2. Formula of high-efficiency light-changing and long-life masterbatch (parts by weight):

[0072]

...

Embodiment 3

[0083] A method for preparing a coating-type light conversion film, comprising the following process:

[0084] 1. Preparation of Longevity Multifunctional Masterbatch:

[0085] Weigh the components according to the formula described in Example 1, raise the temperature of the internal mixer to 130-140°C, and put in low-density polyethylene, dispersant, inorganic ultrafine slow-release heat preservation agent, hindered amine light stabilizer, ultraviolet absorber agent, composite antioxidant, stirred for 7-12 minutes, discharged and cooled, and then put into a granulator for granulation;

[0086] 2. Preparation of high-efficiency light-changing and long-life masterbatch:

[0087] Weigh the components according to the formula described in Example 1, raise the temperature of the high-speed internal mixer to 130-140°C, and put in low-density polyethylene, dispersant, slip agent, nanometer multi-band light-changing agent, inorganic ultrafine Slow-release heat preservation agent,...

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Abstract

The invention relates to a coating-type light conversion film and a preparation method of the coating-type light conversion film. The invention belongs to the technical field of an agricultural film. An inner layer of the coating-type light conversion film is a mechanical property layer; a middle layer is a heat-insulating light conversion layer; a secondary outer layer is a coating carrier layer, and the outer layer is a film coating layer. The preparation method of the coating-type light conversion film comprises the following steps of: (1) preparing a multifunctional master batch with a long service life, heating an internal mixer, charging and agitating, discharging and pelletizing; (2) preparing the master batch with the long service life and efficient light conversion, heating the internal mixer, charging and agitating, discharging and pelletizing; (3) manufacturing the coating light conversion film, weighing the inner layer, the middle layer and the secondary outer layer according the prescription, respectively adding to a blender mixer to agitate and extrude, wherein a die head is of a three-layer composite center feeding form; the material is fused and plastified by three extruders, and coextruded by a round opening die; carrying out corona treatment on the film surface, coating on line, baking and sizing. The coating-type light conversion film has the advantages that the coating-type light conversion film is high in strength, high in impact resistance, high in tear resistance, high in light conversion, high in heat preservation, high in light transmittance, and long in lasting period of drip fog dissipation and the like.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, and in particular relates to a coating type light conversion film and a preparation method thereof. Background technique [0002] At present, multi-functional agricultural film products are mainly produced by traditional internal addition technology, by adding various functional additives to low-density polyethylene or EVA (ethylene-vinyl acetate copolymer resin) resin materials to make the film achieve a longer Service life and dripping anti-fog performance (optical performance). However, the traditional internally added agricultural film has no photoconversion performance, and cannot excite and convert harmful light waves and some invalid light waves in the spectrum into light waves that are beneficial to crop photosynthesis and growth, thereby affecting the photosynthesis intensity of crops, failing to achieve high yields and shortening crop growth. long-term and reduced use of pes...

Claims

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Application Information

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IPC IPC(8): B32B27/18B32B27/32A01G9/14C08L23/06C08L23/08C08K13/02C08K5/17C08K3/26C08K5/20C08J3/22C09D1/00
CPCY02A40/25
Inventor 郝福江杨渝王全有赵为民
Owner TIANJIN TIANSU SCI & TECH GROUP
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