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Composite film with heat insulation effect and preparation method

A technology of composite film and heat insulation effect, which is applied in the field of composite film with heat insulation effect and its preparation, which can solve the problems that agricultural film is not easy to heat insulation, and achieve the effects of simple and easy preparation method, increased production, and simple and easy-to-obtain raw materials

Inactive Publication Date: 2020-08-07
UNIV OF JINAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a composite film with heat insulation effect and its preparation method to overcome the defect that agricultural film is not easy to heat insulation in the prior art.

Method used

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  • Composite film with heat insulation effect and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 1g of monoclinic vanadium dioxide with a particle size of 50nm to 500nm and 1kg of polyethylene into an internal mixer, and banbury at 140°C for 2 hours to obtain a block polymer melt;

[0029] The bulk polymer melt is added to the forced feeder, and the block polymer is added to the single-screw extruder through the forced feeder. The die head temperature of the single-screw extruder is 230 ° C, and the rotation speed is 100 rpm. extrusion of polymer strips;

[0030] The strip polymer is added to the pelletizer, and the granular polymer masterbatch with uniform size is obtained under the rotating speed of 600rpm;

[0031] Add the granular polymer masterbatch into the hopper of the blown film machine, so that the barrel temperature in the three temperature zones of the blown film machine is 180°C, 200°C, and 240°C, the head temperature is 250°C, and the connector temperature is 200°C , the screw rotation frequency was 15.00 Hz, and the winding speed was 150 rpm to ...

Embodiment 2

[0033] Add 3g of monoclinic vanadium dioxide with a particle size of 50nm to 500nm and 1kg of polypropylene into an internal mixer, and banbury at 170°C for 1 hour to obtain a block polymer melt;

[0034] The bulk polymer melt is added to the forced feeder, and the block polymer is added to the single-screw extruder through the forced feeder. The die head temperature of the single-screw extruder is 200 ° C, and the rotation speed is 120 rpm. extrusion of polymer strips;

[0035] Add the strip polymer into the pelletizer at a speed of 800rpm to obtain granular polymer masterbatches of uniform size;

[0036] Add the granular polymer masterbatch into the hopper of the blown film machine, so that the barrel temperature in the three temperature zones of the blown film machine is 200°C, 200°C, and 230°C, the temperature of the head is 200°C, and the temperature of the connector is 240°C , the screw rotation frequency was 18.00 Hz, and the winding speed was 120 rpm to prepare a poly...

Embodiment 3

[0038] Add 5g of monoclinic vanadium dioxide with a particle size of 50nm to 500nm and 1kg of polyvinyl chloride into the internal mixer, and banbury at 220°C for 0.5h to obtain a block polymer melt;

[0039] The bulk polymer melt is added to the forced feeder, and the block polymer is added to the single-screw extruder through the forced feeder. The die head temperature of the single-screw extruder is 200 ° C, and the rotation speed is 150 rpm. extrusion of polymer strips;

[0040] Add the strip-shaped polymer into the pelletizer at a speed of 1000rpm to obtain granular polymer masterbatches with uniform size;

[0041] Add the granular polymer masterbatch into the hopper of the blown film machine, so that the barrel temperature in the three temperature zones of the blown film machine is 180°C, 200°C, and 240°C, the head temperature is 190°C, and the connector temperature is 200°C , the screw rotation frequency was 10.00 Hz, and the winding speed was 120 rpm to prepare a poly...

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Abstract

The invention discloses a composite film with a heat insulation effect and a preparation method, and belongs to the technical field of agricultural films. The composite film comprises the following materials in mass ratio: the mass ratio of a vanadium dioxide nano material to a polymer material is (0.0001-0.01): 1. According to the composite film provided by the invention, infrared rays can normally penetrate through the composite film at low temperature and can be blocked from penetrating through the composite film at high temperature, so that a problem of overhigh temperature in a film greenhouse in summer is effectively solved, and the yield of crops is effectively increased. The preparation method disclosed by the invention is simple and feasible, is suitable for industrial productionand can be widely applied to agricultural production, and raw materials are simple and easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of agricultural films, and in particular relates to a composite film with heat insulation effect and a preparation method. Background technique [0002] Agricultural film is an important agricultural production material after seeds, fertilizers and pesticides. Its application has made important contributions to increasing agricultural efficiency and farmers' income. Agricultural films are mainly shed film and mulch film. Commonly used films are ordinary polyethylene film, polyvinyl chloride film, polyvinyl chloride non-drip film, polyethylene non-drip film, polyethylene multifunctional composite film and EVA multifunctional composite film, etc. . [0003] With the development of rural economy, my country's agricultural film market is showing a trend of accelerated development, and the scope of application is gradually expanding. The structure of greenhouse film products will develop towards multi-layer com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L27/06C08L23/08C08K3/22C08J5/18
CPCC08J5/18C08J2323/06C08J2323/12C08J2327/06C08J2323/08C08K3/22C08K2201/003C08K2201/011
Inventor 刘威游淇蒋绪川聂永周明明徐印珠杨怀民蒋清敏
Owner UNIV OF JINAN
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