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Method for preparing environment-friendly bast fiber mulch film by using laying-hot pressing compound method

A compound method and environment-friendly technology, applied in botany equipment and methods, chemical instruments and methods, lamination, etc., can solve the problems of hard plastic film, complex process, environmental pollution, etc., and achieve easy operation, low cost, enhanced The effect of mechanical properties

Inactive Publication Date: 2018-11-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved by the present invention are: the existing agricultural mulch film has a relatively hard texture, pollutes the environment, has complicated processes and high costs, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing an environment-friendly hemp mulch film by using a net-laying-hot-pressing composite method:

[0026] The discarded hemp of jute from the hemp spinning factory is first opened and removed, and then combed to obtain a uniform fiber thin net, which is spread on the conveyor net to a thickness of 10g / m 2 jute fiber web. A portion of 10g / m 2 The jute fiber web is placed horizontally, laid flat under the hot press zone of the vulcanizer, and then the grammage is 16.4g / m 2 The starch / LDPE film (starch mass content is 70%, LDPE mass content is 30%) is placed on the jute fiber web, another part of 10g / m 2 The jute web is placed lengthwise and laid on top of the starch film. The hot pressing temperature of the flat vulcanizer is set at 120° C., the hot pressing pressure is 2 MPa, the hot pressing time is 120 s, and the composite film is obtained by hot pressing. Spray the surface of the composite membrane with 20% mass concentration of hydroxyl silicon...

Embodiment 2

[0028] A method for preparing an environment-friendly hemp mulch film by using a net-laying-hot-pressing composite method:

[0029] The discarded hemp of jute from the hemp spinning factory is first opened and removed, and then combed to obtain a uniform fiber thin net, which is spread on the conveyor net to a thickness of 15g / m 2 jute fiber web. A portion of 15g / m 2 The jute fiber web is placed horizontally, laid flat under the hot press zone of the vulcanizer, and then the grammage is 16.4g / m 2 The starch / LDPE film (starch mass content is 65%, LDPE mass content is 35%) is placed on the jute fiber net, another part 15g / m 2 The jute web is placed lengthwise and laid on top of the starch film. The hot pressing temperature of the flat vulcanizer is set at 125° C., the hot pressing pressure is 4 MPa, the hot pressing time is 180 s, and the composite film is obtained by hot pressing. Spray the surface of the composite membrane with 20% mass concentration of hydroxyl silicone, ...

Embodiment 3

[0031] A method for preparing an environment-friendly hemp mulch film by using a net-laying-hot-pressing composite method:

[0032] The discarded hemp of jute from the hemp spinning factory is first opened and removed, and then combed to obtain a uniform fiber thin net, which is spread on the conveyor net to a thickness of 20g / m 2 jute fiber web. A portion of 20g / m 2 The jute fiber web is placed horizontally, laid flat under the hot press zone of the vulcanizer, and then the grammage is 16.4g / m 2 The starch / LDPE film (starch mass content is 75%, LDPE mass content is 25%) is placed on the jute fiber web, another part of 20g / m 2 The jute web is placed lengthwise and laid on top of the starch film. The hot pressing temperature of the flat vulcanizer is set at 130° C., the hot pressing pressure is 6 MPa, the hot pressing time is 300 s, and the composite film is obtained by hot pressing. Spray the surface of the composite membrane with 20% mass concentration of hydroxyl silicon...

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PUM

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Abstract

The invention discloses a method for preparing an environment-friendly bast fiber mulch film by using a laying-hot pressing compound method. The method is characterized in by comprising the followingsteps: opening jute fibers and noil fibers to remove impurities, and carding the fibers to obtain jute fiber thin nets; longitudinally and transversely crossing the jute fiber thin nets to lay the net, and performing hot pressing treatment on a starch / LDPE film; spraying an organic silicon waterproof coating layer onto the film, and performing hot calendering treatment. The starch part of the starch / LDPE film in the method can be completely and naturally degraded, and the LDPE part can be melted and adhered at high temperature, so that no adhesive is needed; the obtained mulch film is environmentally friendly and degradable. Meanwhile, the jute fiber is low in cost and high in mechanical property; the compound film is excellent in mechanical property; the low-cost degradable bast fiber mulch film is prepared by fully using waste noil fibers in a jute spinning factory; the problem that a plastic mulch film is difficult to degrade is solved.

Description

technical field [0001] The invention relates to a method for preparing an environment-friendly and degradable hemp mulching film by using a net-laying-hot-pressing composite method, and belongs to the technical field of agricultural mulching films. Background technique [0002] Plastic mulch has the functions of promoting crop growth, increasing yield, keeping warm and moisturizing, and preventing insects, and is widely used in modern agriculture. However, plastic mulch is difficult to degrade naturally and seriously pollutes the environment; in addition, residues in farmland after use will cause damage to the soil structure and affect the growth and development of crops. [0003] At present, domestic researchers are devoting themselves to the development of degradable mulch, but there are still major limitations. For example, photodegradable plastic film can only be degraded in sunlight, but it is difficult to control the degradation rate, and it is no different from ordin...

Claims

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Application Information

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IPC IPC(8): A01G13/02B32B37/10B32B37/06B32B27/32B32B3/12B32B27/12B32B9/02B32B9/04B32B33/00B32B7/10
CPCA01G13/0275B32B3/12B32B5/02B32B7/10B32B9/04B32B9/047B32B27/12B32B27/32B32B33/00B32B37/06B32B37/10B32B2262/065B32B2307/50B32B2307/716
Inventor 刘明洋张斌郁崇文杨建平高丙文
Owner DONGHUA UNIV
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