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Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film

A three-layer co-extrusion, multi-functional technology, applied in the field of agricultural greenhouse film and its preparation, can solve the problems of single function, prone to fog droplets, short life and other problems, achieve good transparency, improve flexibility, coloring and molding processing good effect

Active Publication Date: 2015-04-29
HENAN YINFENG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Improving the current agricultural film to overcome defects such as single function, prone to fog droplets, and short life has become an urgent demand in the agricultural plastic product market

Method used

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  • Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film
  • Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film
  • Three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The raw material formula is as follows: each component is by weight percentage,

[0039] Outer layer: low-density polyethylene 1810D: 20%; linear low-density polyethylene 7047: 50%; metallocene polyethylene 1018HA: 20%; double-proof masterbatch: 10%;

[0040] Middle layer: low-density polyethylene 2426F: 27%; low-density polyethylene 2426H: 10%; linear low-density polyethylene 7042: 27%; ethylene-vinyl acetate copolymer: 27%; three-proof masterbatch: 9%;

[0041] Inner layer: low-density polyethylene 2426F: 25%; low-density polyethylene 2426H: 20%; linear low-density polyethylene 7042: 15%; ethylene-vinyl acetate copolymer: 30%; three-proof masterbatch: 10%.

[0042] The double anti-masterbatch is 20% of dripping agent (glyceryl monostearate); 10% of light stabilizer (polysuccinate); 5% of talcum powder; 5% of polyethylene wax; 60% of PVC resin powder %;

[0043] The three-proof masterbatch is 20% of dripping agent (glyceryl monostearate); 10% of light stabilizer (pol...

Embodiment 2

[0046] Outer layer raw material formula: each component is calculated by weight percentage

[0047] Linear Low Density Polyethylene (LLDPE) 50%,

[0048]Low-density polyethylene (LDPE) 30%,

[0049] Metallocene polyethylene (mPE) 10%,

[0050] Double anti-masterbatch 10%;

[0051] Middle layer raw material formula:

[0052] Ethylene-vinyl acetate copolymer (EVA) 40%,

[0053] Linear Low Density Polyethylene (LLDPE) 30%,

[0054] Low-density polyethylene (LDPE) 20%,

[0055] Three-proof masterbatch 10%;

[0056] Inner layer raw material formula:

[0057] Ethylene-vinyl acetate copolymer (EVA) 20%,

[0058] Linear Low Density Polyethylene (LLDPE) 30%,

[0059] Low density polyethylene (LDPE) 40%,

[0060] Three-proof masterbatch 10%;

[0061] The double anti-masterbatch is 20% of dripping agent (glyceryl monostearate); 10% of light stabilizer (polysuccinate); 5% of talcum powder; 5% of polyethylene wax; PVC resin powder? 60%;

[0062] The three-proof masterbatch is ...

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Abstract

The invention discloses a nano fog-dissipation multifunctional greenhouse agricultural film, and in particular relates to a three-layer co-extruded EVA (ethylene-vinyl acetate copolymer) long-life fog-dissipation environment-friendly multifunctional greenhouse film, belonging to the field of agricultural mulching films. The raw material formula of an outer layer comprises the following components in percentage by weight: 20-50% of linear low-density polyethylene (LLDPE), 20-50% of low-density polyethylene (LDPE), 10-20% of metallocene polyethylene (mPE) and 5-10% of double-prevention masterbatch; the raw material formula of a middle layer comprises the following components in percentage by weight: 30-40% of ethylene-vinyl acetate copolymer (EVA), 20-40% of linear low-density polyethylene (LLDPE), 20-40% of low-density polyethylene (LDPE) and 5-10% of three-prevention masterbatch; the raw material formula of an inner layer comprises the following components in percentage by weight: 30-40% of ethylene-vinyl acetate copolymer (EVA), 10-20% of linear low-density polyethylene (LLDPE), 20-50% of low-density polyethylene (LDPE) and 5-10% of three-prevention masterbatch; and the formulas of the outer layer, the middle layer and the inner layer are uniformly mixed respectively, master batches are prepared by using a double-head thread screw double-screw extruding machine, a three-layer film is formed through a co-extrusion die head and is extruded out to prepare the multifunctional agricultural greenhouse film. Every quality technical index of the film reaches or exceeds a national standard, and a small part of the indexes is more than 2 times better than the national standard, so that the film is excellent in antiaging performance and cannot generate fog drops, and the service life of the film reaches more than 3 years.

Description

technical field [0001] The invention relates to an agricultural greenhouse film and a preparation process thereof, in particular to the preparation of a nanometer anti-fog greenhouse agricultural film by using EVA as a raw material, and belongs to the field of agricultural plastic films. Background technique [0002] Agricultural film is an important means of production in agriculture after seeds, fertilizers, and pesticides. Its application has brought a revolution to my country's agricultural production and has made important contributions to increasing agricultural efficiency and increasing farmers' income. Commonly used films are ordinary polyvinyl chloride film, polyvinyl chloride non-drip film, ordinary polyethylene film, polyethylene non-drip film, polyethylene multi-functional composite film and EVA multi-functional composite film. However, there are generally defects such as single function, prone to fog droplets, and short life. [0003] At present, domestic agric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B27/20C08L23/08C08L23/06B29C47/62A01G9/14B29C48/525
CPCB29C48/575A01G9/1438B29C48/525Y02A40/25
Inventor 孙美菊孙爱亲豆开畅王勇
Owner HENAN YINFENG PLASTIC
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