Light-transmitting thin non-woven degradable agricultural mulching film and preparation method

An agricultural mulching film and non-woven technology, which is applied in the field of light-transmitting thin non-woven degradable agricultural mulching film and its preparation, can solve the problems of poor light transmission, poor thin layer strength, and poor light transmission of hemp mulch film, and achieves good environmental protection and light weight. , the effect of high tensile strength and elongation at break

Active Publication Date: 2018-01-12
吴雨潞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the poor light transmittance and relatively thick defects of the existing degradable hemp mulch film, the present invention proposes a light-transmitting thin non-woven agricultural degradable hemp mulch film and its preparation method. The woven fabric is based on this as the skeleton, and the thermoplastic starch is pressed in the large pores, thus forming a non-woven hemp mulch film with hemp fiber as the net and thermoplastic starch as the mesh, which effectively solves the problem of poor light transmission and thin layer strength of the hemp mulch film. Poor defect, and fully degradable

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A light-transmitting thin non-woven agricultural degradable hemp mulch film and a preparation method thereof, the specific process of preparing the degradable hemp mulch film is as follows:

[0035] The ramie fibers are cut into long fibers with a length of 80 mm in the fiber cutter, and after they are naturally dried until the moisture content is lower than 3%, they are introduced into a roller press, and the fiber structure is tended under the high pressure of 120 MPa between the rollers. In the loose, and then unbundled to obtain microfibers. Then import it into the screening machine, and use a mesh vibrating sieve with an aperture of 2mm to sieve it, remove most of the powdery colloid, starch and dust in the hemp fiber, and obtain fine hemp fiber with higher purity; The mixed solution with a fraction of 4% and a mass fraction of sodium sulfite of 5% is mixed with hemp fiber in a mass ratio of 1:4, stirred evenly, soaked at normal temperature and pressure for 20h, an...

Embodiment 2

[0038] A light-transmitting thin non-woven agricultural degradable hemp mulch film and a preparation method thereof, the specific process of preparing the degradable hemp mulch film is as follows:

[0039] The hemp fiber is cut into long fibers with a length of 60mm in the fiber cutting machine, and after it is naturally dried to a moisture content lower than 3%, it is introduced into a roller press, and the fiber structure is tended under the high pressure of 130MPa between the rollers. In the loose, and then unbundled to obtain microfibers. Then import it into the screening machine, and use a mesh vibrating sieve with an aperture of 2mm to sieve it, remove most of the powdery colloid, starch and dust in the hemp fiber, and obtain fine hemp fiber with higher purity; The mixed solution with a fraction of 2% and a mass fraction of sodium sulfite of 5% is mixed with the hemp fiber in a mass ratio of 1:4, stirred evenly, soaked at normal temperature and pressure for 24 hours, and...

Embodiment 3

[0042] A light-transmitting thin non-woven agricultural degradable hemp mulch film and a preparation method thereof, the specific process of preparing the degradable hemp mulch film is as follows:

[0043] In the fiber cutting machine, the jute fiber is cut into long fibers with a length of 70 mm. After it is naturally dried to a moisture content lower than 3%, it is introduced into a roller press, and the fiber structure is tended under the high pressure of 140 MPa between the rollers. In the loose, and then unbundled to obtain microfibers. Then import it into the screening machine, and use a mesh vibrating sieve with an aperture of 2mm to sieve it, remove most of the powdery colloid, starch and dust in the hemp fiber, and obtain fine hemp fiber with higher purity; The mixed solution with a fraction of 3% and a mass fraction of sodium sulfite of 7% is mixed with the hemp fiber at a mass ratio of 1:5, stirred evenly, soaked at normal temperature and pressure for 22 hours, and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention belongs to the technical field of agricultural mulching film preparation, and provides light-transmitting thin non-woven degradable agricultural mulching film and a preparation method. The method comprises the steps that firstly, hemp fibers are cut into long fibers, and colloidal materials, starch, dust and the like are scattered, sieved and removed; a mixed solution of sodium hydroxide and sodium sulfite is adopted for soaking treatment, paper slurry is obtained by means of a blasting method, and thin-layer non-woven fabric with large holes is prepared through the processes ofslurry grinding, beating and papermaking; the large holes are painted with thermoplastic starch, and the light-transmitting thin non-woven degradable agricultural mulching film can be prepared after hot-pressing and plasticizing molding. Compared with traditional methods, the method overcomes the defect of low transmittance of hemp fiber mulching film and the technical bottleneck that low thickness and high strength cannot be achieved at the same time.

Description

technical field [0001] The invention belongs to the technical field of agricultural plastic film preparation, and provides a light-transmitting thin non-woven degradable agricultural plastic film and a preparation method thereof. Background technique [0002] Agricultural mulch is an important means of production in modern agriculture. The wide application of agricultural plastic mulching technology has greatly promoted the increase of crop yield and the development of agricultural production, but at the same time, it has also brought more and more serious "white pollution". Because plastic mulch is made of chemical fibers, its main components are polypropylene and polyvinyl chloride, which can remain in the field for hundreds of years without degrading. With the increase in the number of years of use of plastic mulch, more and more plastic film fragments remain in the soil. If things go on like this, it will cause soil compaction, poor permeability, and soil fertility decl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G13/02
Inventor 陈庆曾军堂
Owner 吴雨潞
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