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Fully-degradable heat-insulation mulch and preparation method thereof

A fully degradable, mulching technology, applied in the direction of plant protection cover, can solve the problems of yield impact, no insulation effect, affecting crop growth and development, etc., to increase the interface bonding force, improve mechanical compatibility and mechanical Performance, effect of reducing interfacial tension

Inactive Publication Date: 2013-05-08
WUHAN HUALI BIOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Experiments have proved that the use of traditional black plastic film is only beneficial to the increase of the surface temperature, but the temperature of the roots of the crops in the soil is much lower than the temperature of the surface, which does not play a real role in heat preservation, and still seriously affects the growth and development of crops. Yield has a negative impact

Method used

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  • Fully-degradable heat-insulation mulch and preparation method thereof
  • Fully-degradable heat-insulation mulch and preparation method thereof
  • Fully-degradable heat-insulation mulch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 60 parts by mass of hydrotalcite powder and 40 parts by mass of PBAT resin were uniformly mixed in a high-speed mixer, and extruded and granulated by a twin-screw extruder to obtain fully degraded hydrotalcite masterbatches.

[0039] 40 parts by mass of PBAT, 20 parts by mass of polylactic acid, 20 parts by mass of corn starch, 5 parts by mass of glycerin, 2 parts by mass of BASF chain extender JONCRYL ADR-4368, 5 parts by mass of fully degraded hydrotalcite masterbatch and 8 parts by mass of Light calcium carbonate is mixed evenly in a high-speed mixer, and then the mixture is mixed in a twin-screw extruder. The temperature of each section of the twin-screw extruder is set at T1=140°C, T2=150°C, and T3=150°C , T4=155°C, T5=155°C, T6=155°C, the speed of the twin-screw extruder is R=300r·min-1; after that, extrude, cool, and granulate to obtain the material for fully degradable thermal insulation film ;Combined with fully degradable color masterbatch after secondary proc...

Embodiment 2

[0043] 70 parts by mass of hydrotalcite powder and 30 parts by mass of PBAT resin were uniformly mixed in a high-speed mixer, and extruded and granulated by a twin-screw extruder to obtain fully degraded hydrotalcite masterbatches.

[0044] Mix 30 parts by mass of PBAT, 30 parts by mass of polylactic acid, 10 parts by mass of tapioca starch, 5 parts by mass of ethylene glycol, 20 parts of fully degraded hydrotalcite masterbatch and 5 parts by mass of talcum powder in a high-speed mixer, and then mix the mixture in Mixing in the twin-screw extruder, the temperature of each section of the twin-screw extruder is set as T1=155°C, T2=160°C, T3=165°C, T4=165°C, T5=160°C, T6=165°C, The speed of the twin-screw extruder is R=300r·min-1; after that, extrude, cool, and granulate to obtain the material for the fully degradable thermal insulation film; and then cooperate with the color masterbatch to obtain the fully degradable thermal insulation film through secondary processing , through...

Embodiment 3

[0048] 50 parts by mass of hydrotalcite powder and 50 parts by mass of PBAT resin were uniformly mixed in a high-speed mixer, and extruded and granulated by a twin-screw extruder to obtain fully degradable hydrotalcite masterbatches.

[0049] Mix 60 parts by mass of poly PBAT, 10 parts by mass of polylactic acid, 10 parts by mass of corn starch, 5 parts by mass of propylene glycol, 10 parts by mass of fully degraded hydrotalcite masterbatch and 5 parts by mass of light calcium carbonate in a high-speed mixer, and then The mixture is kneaded in the twin-screw extruder, and the temperature of each section of the twin-screw extruder is set as T1=145°C, T2=155°C, T3=160°C, T4=160°C, T5=165°C, T6= 165°C, the speed of the twin-screw extruder is R=300r·min-1; after that, extrude, cool, and granulate to obtain the material for the fully degradable thermal insulation film; and then cooperate with the fully degradable color masterbatch to undergo secondary processing. Obtain fully degra...

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Abstract

The invention relates to fully-degradable heat-insulation mulch and a preparation method thereof. The fully-degradable heat-insulation mulch comprises the following components in parts by mass: 30-60 parts of PBAT (poly(butylene adipate terephthalate), 10-30 parts of polylactic acid, 10-30 parts of starch, 5-10 parts of plasticizer, 0-2 parts of chain extender, 5-10 parts of fillings, 5-20 parts of fully-degradable hydrotalcite master batch and 0-5 parts of fully-degradable color master batch. The preparation method of the fully-degradable heat-insulation mulch comprises the following steps of: carrying out extruding pelletizing on hydrotalcite powder and the PBAT in double screws to obtain the hydrotalcite master batch, preparing a material for the fully-degradable heat-insulation mulch from the hydrotalcite master batch, the PBAT, the starch, the polylactic acid, the plasticizer, the chain extender and the fillings according to a specific production process, and finally carrying out secondary processing on the obtained material in coordination with the fully-degradable color master batch to obtain the fully-degradable heat-insulation mulch. The fully-degradable heat-insulation mulch disclosed by the invention has the capability of completely degrading in soil and is good in heat insulation property, low in production cost, favorable in economic and social benefits and worthy of popularization and application.

Description

technical field [0001] The invention relates to a fully degradable topdressing mulch film and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Plastic film is one of the important means of production in agricultural production. It can not only improve ground temperature, water conservation, soil conservation, fertilizer conservation and fertilizer efficiency, but also can kill weeds, prevent diseases and insect pests, prevent drought and waterlogging, suppress salt and protect seedlings, and improve near-ground sunlight. thermal conditions, make the product hygienic and clean and many other functions. [0003] As a large agricultural country, my country has a vast territory and great climate differences across regions. Therefore, the application and development of mulch film has been very rapid in the past 30 years. It is the country with the largest consumption of mulch film, the largest coverage area, and th...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L3/02C08K13/02C08K5/053C08K5/16C08K3/26C08K3/34C08K3/22C08J3/22B29C47/92A01G13/02B29C48/92
CPCB29C48/04B29C48/40
Inventor 危伟金国轴盖付亮王淑敏张立斌
Owner WUHAN HUALI BIOLOGY CO LTD
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