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Fully biodegradable mulch film for tobacco and its preparation method

A fully degradable, smoke-based technology, applied in plant protection cover, climate change adaptation and other directions, can solve the problems that the film cannot reach 100% degradation, promotion and industrialization restrictions, increase the complexity of preparation, etc., to achieve process performance and hydrophobicity. Performance improvement, thin film thickness, and strength-enhancing effects

Inactive Publication Date: 2005-08-10
CHANGZHOU ZHISI APPLIED FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the former preparation method has low output and high equipment cost, while the latter needs to undergo polycondensation reaction to obtain formula raw materials, which will inevitably increase the complexity of preparation and increase production costs, and the polyethylene contained in the formula will cause the film to fail to reach 100%. These will inevitably limit the promotion and industrialization of the products involved in the above two technologies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] 45% cornstarch, 10% glycerol, 40% ethylene vinyl alcohol copolymer, 5% maleic anhydride grafted ethylene vinyl acetate copolymer were stirred in a high-speed mixer for 10 minutes to make the mixture uniform, and then extruded in a twin-screw Mixing, extrusion and granulation in the machine, barrel I zone 120°C; barrel II zone 130°C; barrel III zone 140°C; die head I zone 140°C; die head II zone 150°C. The prepared pellets are blown into film on the film blowing unit, the barrel I zone is 150°C; the barrel II zone is 160°C; the barrel III zone is 170°C; the die head I zone is 170°C; the die head II zone is 180°C.

Embodiment 2

[0013] 57% corn starch, 30% (ethylene glycol), 10% ethylene vinyl alcohol copolymer, and 3% montmorillonite were stirred in a high-speed mixer for 15 minutes to make the mixture uniform, and then mixed in a twin-screw extruder Refining, extrusion, granulation, barrel I zone 130°C; barrel II zone 140°C; barrel III zone 150°C; die head I zone 160°C; die head II zone 170°C. The prepared pellets are blown into film on a film blowing unit, the barrel I zone is 160°C; the barrel II zone is 170°C; the barrel III zone is 180°C; the die head I zone is 190°C; the die head II zone is 200°C.

Embodiment 3

[0015] Stir 30% corn starch, 10% glycerin, 5% sorbitol, 50% ethylene vinyl alcohol copolymer, and 5% clay in a high-speed mixer for 15 minutes to make the mixture uniform, and then knead in a twin-screw extruder , Extrusion, granulation, barrel I zone 150°C; barrel II zone 160°C; barrel III zone 170°C; die head I zone 170°C; die head II zone 180°C. The prepared pellets are blown into film on a film blowing unit, the barrel I zone is 180°C; the barrel II zone is 190°C; the barrel III zone is 200°C; the die head I zone is 200°C; the die head II zone is 210°C.

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Abstract

A biodegradable ground-covering film for tobacco is prepared from corn starch, plasticizer, ethene-vinylol copolymer, compatibilizing modifier and clay through proportionally mixing, and moulding or doctor blading.

Description

technical field [0001] The invention relates to a mulch film for tobacco and a preparation method thereof, in particular to a fully biodegradable mulch film for tobacco and a preparation method thereof. Background technique [0002] Tobacco mulch film has many advantages in tobacco field planting, such as increasing ground temperature, preventing drought and preserving moisture, keeping soil loose and promoting nutrient transformation, reducing tobacco field pests and diseases, accelerating the growth and development of tobacco plants, and expanding the suitable planting area of ​​flue-cured tobacco. Tobacco mulch film cultivation technology As an important technology for increasing production and income in the tobacco planting industry, it is constantly developing and expanding. According to statistics, the plastic film mulching cultivation technology for tobacco can increase the yield of tobacco leaves by about 15%, the color after roasting is bright, and the average price...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/02C08J5/18C08L3/02C08L29/04
CPCY02A40/28
Inventor 孙康乔秀颖杜爱祥
Owner CHANGZHOU ZHISI APPLIED FILM
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