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High-heat-preservation composite film as well as preparation method and application thereof

A composite film and high heat preservation technology, applied in the field of composite film, can solve the problems of poor heat preservation effect of crops, poor light transmittance of mulch film, and short sunshine time, so as to facilitate mass industrial production, improve long-term heat preservation effect, and improve the drop effect effect

Pending Publication Date: 2021-04-20
ZHENGXIN PACKAGING CO LTD DONGGUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the light transmittance of the mulch film provided by the above-mentioned invention is still relatively poor, especially when the mulch film is used as a crop protection shed in autumn and winter in the north, the sunshine time is short, and the sunlight reaching the surface of the crops through the PE mulch film is less, which is harmful to the crops. The insulation effect is poor, and because of the large temperature difference between day and night in the north in autumn and winter, it will also accelerate the aging of PE film

Method used

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  • High-heat-preservation composite film as well as preparation method and application thereof
  • High-heat-preservation composite film as well as preparation method and application thereof
  • High-heat-preservation composite film as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0070] A high thermal insulation composite membrane, the schematic diagram of its cross-sectional structure is as follows figure 1 As shown, it includes an anti-drip layer 1, a first aging-resistant toughness layer 2, a strength layer 3, a second aging-resistant toughness layer 4 and a transparent layer 5 arranged in sequence;

[0071] Wherein, the thickness of the drip-proof layer 1 is 1 μm, and the material includes metallocene polyethylene (melt index is 0.5g / 10min, density is 0.916g / cm 3 ), low-density polyethylene with a mass percentage of 14% (melt index is 1g / 10min, density is 0.92g / cm 3 ), a mass percentage of 1% methyl methacrylate and a mass percentage of 5% anti-dripping agent (Swiss Klein, XTR96);

[0072] The thickness of the first aging-resistant toughness layer 2 is 1.5 μm, and the material includes metallocene polyethylene (melt index is 0.9g / 10min, density is 0.917g / cm 3 ), ultra-low density polyethylene (melt index is 3g / 10min, density is 0.9g / cm 3 ), an a...

Embodiment 2

[0078] A high thermal insulation composite film, the cross-sectional structure of which is the same as in Example 1, comprising a drip-proof layer, a first aging-resistant toughness layer, a strength layer, a second aging-resistant toughness layer and a transparent layer arranged in sequence;

[0079] Wherein, the thickness of the anti-drip layer is 1.2 μm, and the material includes metallocene polyethylene (melt index is 0.4g / 10min, density is 0.91g / cm 3 ), low-density polyethylene with a mass percentage of 21% (melt index is 0.25g / 10min, density is 0.916g / cm 3 ), a mass percentage of 3% acrylonitrile and a mass percentage of 6% anti-dripping agent (Switzerland Clariant, CESA);

[0080] The thickness of the first aging-resistant tough layer is 2 μm, and the material includes metallocene polyethylene (melt index is 0.8g / 10min, density is 0.915g / cm2) with a mass percent content of 89%. 3 ), ultra-low density polyethylene with a mass percentage of 10.4% (melt index is 2g / 10min,...

Embodiment 3

[0086] A high thermal insulation composite film, the section of which is the same as in Example 1, comprising a drip-proof layer, a first aging-resistant toughness layer, a strength layer, a second aging-resistant toughness layer and a transparent layer arranged in sequence;

[0087]Wherein, the thickness of the anti-drip layer is 0.8 μm, and the material is metallocene polyethylene (melt index is 0.7g / 10min, density is 0.92g / cm 3 ), low-density polyethylene with a mass percentage of 5% (melt index is 2g / 10min, density is 0.922g / cm 3 ), a mass percentage of 0.5% maleic anhydride and a mass percentage of 0.5% anti-dripping agent (Switzerland Clariant, CESA);

[0088] The thickness of the first aging-resistant toughness layer is 1.6 μm, and the material is metallocene polyethylene (melt index is 2g / 10min, density is 0.92g / cm 3 ), ultra-low density polyethylene with a mass percentage of 29.65% (melt index is 1g / 10min, density is 0.905g / cm 3 ), an antioxidant with a mass percent...

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Abstract

The invention provides a high-heat-preservation composite film and a preparation method and application thereof. The high-heat-preservation composite film comprises a drip-proof layer, a first ageing-resistant tough layer, a strength layer, a second ageing-resistant tough layer and a transparent layer which are sequentially arranged, and the drip-proof layer is made of polar monomers; the polar monomer is added into the material of the drip-proof layer, so that the material of the drip-proof layer is not prone to loss, the drip-proof effect is improved, the long-acting heat preservation effect of the high-heat-preservation composite film is further improved, and the requirement for the temperature needed by crop growth in autumn and winter can be met; and the preparation method of the high-heat-preservation composite film is simple, no extra procedure needs to be added, and large-batch industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of composite membranes, and in particular relates to a high thermal insulation composite membrane and its preparation method and application. Background technique [0002] Mulch film, that is, ground covering film, is usually transparent or black film, and there are also green and silver films, which are used for agricultural ground covering. Mulching film can not only improve ground temperature, water retention, soil conservation, fertilizer conservation and fertilizer efficiency, but also has many functions such as weed control, pest control, drought and waterlogging resistance, salt suppression and seedling protection, improvement of light and heat conditions near the ground, and sanitation and cleaning of products. . [0003] PE film has the characteristics of low thickness, high output, low cost, etc., and has good heat preservation and entropy retention. It can not only increase the ground temperatur...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B27/18B32B27/06A01G13/02A01G9/14C08L23/06C08L33/12C08L23/14C08J5/18
CPCY02A40/25
Inventor 黄镇荣林城黄卫东全明德周丽英
Owner ZHENGXIN PACKAGING CO LTD DONGGUAN