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Hemp fiber biological soil covering membrane and preparation method thereof

A technology of hemp fiber and hemp skin is applied in the field of agricultural biological soil covering film and its manufacture, which can solve the problems of hardening, difficulty in recycling, and secondary soil salinization.

Active Publication Date: 2018-11-02
SHANGHAI ZHONGWEI BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since such products are usually non-permanent materials, the service life is only one year or half a year. After crop harvesting, green plant covering, soil work, etc., a large amount of used soil film remains on the land, which is difficult to recycle. The accumulation of more and more will lead to the loss of soil activity and air permeability, hinder the migration of soil water and fertilizer, affect the activity of soil microorganisms and the formation of normal soil structure, cause secondary salinization and compaction of soil, and greatly reduce the use value of land. with long-term adverse effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Raw material of kenaf: natural dried fresh hemp bark, about 1-2 meters long, with a water content of about 15%.

[0079] Send the kenaf into the pulverizer, adjust the sieve to 1.5cm, and pulverize at a high speed. Throw the pulverized material into the pool, use non-ionic silicone bulking agent (N608), keep warm at 42°C, and soak for 3 hours. The material is taken out and squeezed dry, the water content is about 70%, and sent to the refiner. The gap between the two grinding discs is 0.2 mm, and the rotational speed of the grinding discs is 1800 rpm. After refining, the material is sent to the hydraulic extrusion device, and the water content of the material after extrusion is 46%, loose and not sticky. Send the material to the scrap opener for opening, and then send it to the fluidized bed dryer for drying. The drying air temperature is 60°C. After drying, the moisture content of the material is 21%, and it is slightly sticky and tangled. Immediately send the materi...

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Abstract

The invention relates to a hemp fiber biological soil covering membrane and a preparation method thereof. The method comprises the preprocessing and membrane forming steps of hemp crops. A preprocessing method comprises the procedures of pulverizing, soaking, defibrination, dehydrating, loosening for the first time, drying, loosening for the second time and the like; preprocessed materials and assistants are mixed, the mixture is placed in air-flowing type non-woven web forming equipment for membrane forming processing, and therefore the hemp fiber biological soil covering membrane is formed.The hemp fiber biological soil covering membrane has the advantages of being good in air permeability, capable of degrading and free from environmental pollution and the like, and the hemp fiber biological soil covering membrane is suitable for industrial production. The hemp fiber biological soil covering membrane and the preparation thereof are worthy of use and popularization.

Description

technical field [0001] The invention relates to the field of natural polymer materials, in particular to a degradable agricultural biological soil covering film made of hemp fiber and a manufacturing method thereof. Background technique [0002] Soil-covered film refers to the cloth film material that is in direct contact with the soil when laying in the fields of agriculture and ecology. The main types are divided according to their uses, including agricultural film, grass planting felt, geotextile, slope protection cloth, etc. The total output of such products in my country More than 2 million tons. Traditional soil covering membranes are mainly made of petroleum-based products such as polyethylene, blown, woven or non-woven. Because such products are usually non-permanent materials, the service life is only one year or half a year. After crop harvesting, green plant covering, soil work, etc., a large amount of used soil film remains on the land, which is difficult to recy...

Claims

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Application Information

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IPC IPC(8): D21B1/06D21B1/16D21C9/18D21C9/00D21H11/12D21H17/53D04H1/425D04H1/732
CPCD04H1/425D04H1/732D21B1/06D21B1/16D21C9/00D21C9/18D21H11/12D21H17/53
Inventor 张玟籍张士楚
Owner SHANGHAI ZHONGWEI BIOCHEM
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