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Fully biodegradable weeding cloth and preparation method thereof

An all-biological, grass-cloth technology, applied in the direction of non-woven fabrics, stretch spinning, filament/thread forming, etc., can solve the problems of unsatisfactory weeding effect, avoid direct sunlight, high temperature deformation, excellent heat resistance, The effect of saving labor recovery cost

Active Publication Date: 2018-02-23
WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polylactic acid is easily degraded in the natural environment. The non-woven fabrics produced by the above two methods are not treated, and the weeding cloth made of them is easily degraded when exposed to nature, so that weeds continue to grow, and the weeding effect is not good. ideal

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

[0039] (1) After drying the polylactic acid resin, weigh 100 parts of polylactic acid (manufactured by NatureWorks, USA, brand 4032D) and 0.1 part of anti-hydrolysis agent (the anti-hydrolysis agent has the structural formula CF 3 (CF 2 ) 10 CH 2 OH’s fluorine-containing alcohol capping agent), 1 part of nucleating agent dibenzoic acid dibenzoyl hydrazide, 1 part of nucleating agent talcum powder (3000 mesh), 5 parts of herbicide paraquat, 5 parts of nitrogen fertilizer, and coloring agent Jinguang Mix 0.5 parts of red, 0.3 parts of antioxidant 1010, and 0.5 parts of lubricant stearic acid in a high mixer;

[0040] (2) Add the homogeneously mixed material in step (1) into the plastic extrusion flat film flat wire machine, melt and extrude it at a temperature of 150-220°C, and then cool it in the first water tank with a water temperature of 40°C. The final filament is introduced into the first guide roller with three rollers, and then the filament derived from the first guid...

Embodiment 2

[0046] (1) After drying the polylactic acid resin, weigh 100 parts of polylactic acid (manufactured by NatureWorks, USA, brand 2003D) and 5 parts of anti-hydrolysis agent (the anti-hydrolysis agent has the structural formula CF 3 (CF 2 ) 5 SO 2 NCH 3 (CH 2 ) 2 OH’s fluorine-containing alcohol capping agent), 5 parts of nucleating agent dibenzoylhydrazide sebacic acid, 0.01 part of nucleating agent nano-montmorillonite (8000 mesh), 10 parts of herbicide palapaquat, 1 part of phosphate fertilizer, coloring 2 parts of agent carbon black, 1 part of antioxidant 1076, and 1 part of lubricant calcium stearate are mixed evenly in a high mixer;

[0047] (2) Add the homogeneously mixed material in step (1) into a twin-screw extrusion granulator, control the screw temperature at 150-200°C, the screw speed at 200rpm, melt extrusion, strand drawing, cooling, pelletizing and drying , to obtain modified polylactic acid particles.

[0048] (3) Add the modified polylactic acid granules ...

Embodiment 3

[0052] (1) After drying the polylactic acid resin, weigh 100 parts of polylactic acid (manufactured by NatureWorks, USA, brand 6202D) and 10 parts of anti-hydrolysis agent (the anti-hydrolysis agent has the structural formula CF 3 (CF 2 ) 100 N M 2 CH 2 OH’s fluorine-containing alcohol capping agent), nucleating agent NA-11 (CAS No.: 85209-91-2) 0.01 part, nucleating agent talc powder 5 parts (6000 mesh), herbicide glyphosate 1 part, potassium fertilizer 10 parts, 1 part of colorant chromium oxide green, 0.1 part of antioxidant 168, and 0.3 part of lubricant erucamide are mixed evenly in a high mixer;

[0053] (2) Add the homogeneously mixed materials in step (1) to the spunbonded nonwoven fabric spinning equipment, and obtain the modified polylactic acid spunbonded nonwoven fabric by spinning according to the conventional polylactic acid spunbonded nonwoven fabric spinning process. cloth, and reinforced by a hot rolling process to obtain the required fully biodegradable s...

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 relates to a fully biodegradable weeding fabric and a preparation method thereof, and belongs to the field of high polymer materials. The fully biodegradable weeding fabric is prepared from the following components in parts by weight: 100 parts of polylactic acid, 0.1 to 15 parts of an anti-hydrolysis agent, 0.01 to 5 parts of an organic nucleating agent, 0.01 to 5 parts of an inorganic nucleating agent, 0 to 10 parts of a weeding agent, 0 to 10 parts of a fertilizer, 0 to 2 parts of a coloring agent, 0 to 1 part of an antioxidant, and 0 to 1 part of a lubricating agent. The preparation method comprises the following steps: adding materials which are mixed uniformly or modified polylactic acid particles into a plastic extrusion plane membrane flat filament machine to produce flat filaments; introducing obtained flat filaments into a plastic weaving machine to weave the fully biodegradable woven weeding fabric; adding the materials which are mixed uniformly or the modified polylactic acid particles into spun-bonded non-woven fabric spinning equipment, spinning and reinforcing by adopting a hot rolling process to prepare the fully biodegradable spun-bonded non-woven weeding fabric; guiding the fully biodegradable woven weeding fabric and the fully biodegradable spun-bonded non-woven weeding fabric into compounding equipment for compounding, so that the upper layer is the fully biodegradable woven weeding fabric and the lower layer is the fully biodegradable spun-bonded non-woven weeding fabric; reinforcing the compound fabric by adopting a needle punching process to obtain the required fully biodegradable compound weeding fabric.

Description

technical field [0001] The invention relates to the field of preparation of polymer materials, in particular to a fully biodegradable weeding cloth and a preparation method thereof. Background technique [0002] As we all know, weeds are very easy to absorb nutrients and water in the soil, and compete with target plants for light and ground space, causing great harm to the growth of target plants. A commonly used weeding method is to cover the soil surface with a layer of plastic woven weeding cloth, blown PE film weeding cloth or spunbonded non-woven weeding cloth, and use the weeding cloth to hinder the photosynthesis of weeds and sunlight to achieve the purpose of weeding . [0003] However, traditional weeding cloths are mainly made of non-degradable materials such as polypropylene (PP), polyethylene (PE) or polyethylene terephthalate (PET), as described in patents CN204560738 and CN204217729. Weeding cloths made of these non-degradable materials are prone to aging aft...

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 Patents(China)
IPC IPC(8): C08L67/04C08K13/02C08K5/25C08K3/34C08K5/52D04H3/14D04H3/011D04H3/105D01D5/12D01D5/084D01D5/088
CPCC08K3/34C08K3/346C08K5/25C08K5/52C08K13/02C08K2201/011C08L2201/06C08L2201/08C08L2205/24D01D5/084D01D5/0885D01D5/12D04H3/011D04H3/105D04H3/14C08L67/04
Inventor 王新灵孙波孙若铖
Owner WEIHAI LIANGAN ENVIRONMENTAL PROTECTION NEW MATERIAL TECH CO LTD
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