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Production process of PLA (poly lactic acid fiber) geotextile

A production process and technology of geotextiles, applied in non-woven fabrics, textiles and papermaking, etc., can solve the problems of ecological environment damage, poor degradation ability, unenvironmental protection, etc., and achieve good thermal stability, excellent physical properties, and excellent water permeability. Effect

Inactive Publication Date: 2013-02-20
大连恒大高新材料开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The geotextile products currently used have poor degradability, and they will not rot after being buried in the ground for ten or twenty years. They are all non-environmentally friendly products in terms of environmental protection.
For temporary projects, once the project is over, it is meaningless to bury the geotextiles in the ground, and it needs to be recycled, and the ecological environment will be damaged if it is not recycled.

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 Construction

[0007] A PLA geotextile is produced through a one-step process. In order to obtain high-quality PLA geotextiles, polylactic acid with a molecular weight of 300,000-350,000 is selected as a raw material. Its production process: polylactic acid particles are screened and transported to remove powder and conjoined materials, and then dried by vacuum drums. During the drying process, the crystallinity and softening point of the particles will be improved. When the melting point reaches above 180 ° C, the crystallinity When it reaches more than 75%, melt spinning is carried out, and the spinning box for melt spinning adopts double-row spinneret spinning box, and the corresponding subsequent drafting and spinning device is also double-row. The tow sprayed out of the spinneret needs to be cooled by constant temperature and humidity in the ring. On the mesh belt, the fibers are arranged in three dimensions when laying the net, and the fibers cross and overlap each other. The width of ...

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PUM

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Abstract

The invention discloses a production process of PLA (poly lactic acid fiber) geotextile, and belongs to degradable non-pollution geotextile. The PLA geotextile is made of PLA which is prepared from raw materials including grains such as crops, rice and sorghum by steps of fermenting and polymerizing. The PLA geotextile has the advantages of good physical performance, good thermal stability, light weight, biological compatibility and excellent water and air permeability, and is environment-friendly degradable, non-pollution, harmless ecological geotextile capable of being degraded into carbon dioxide and water completely on natural conditions.

Description

technical field [0001] The invention relates to a production process of PLA geotextiles, which belongs to degradable pollution-free geotextiles. In particular, it relates to an environmentally friendly PLA geotextile that can be completely decomposed into water and carbon dioxide in soil and water under natural conditions, also known as polylactic acid geotextile. Background technique [0002] At present, judging from the use of domestic geotextiles, the raw materials of geotextiles are made of polyester, polypropylene, nylon or a mixture of two or more fibers. The application fields include roads, railways, landfill plants, reservoirs, tunnels, land reclamation, Landscaping, etc., especially some projects where geotextiles play a short-term role, such as temporary retaining walls, temporary cofferdams, temporary soil mounds to prevent rain erosion, etc. The role of geotextiles is to strengthen, isolate, Reverse filtration, protection, drainage. The geotextile products cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/011D04H3/02D04H3/105
Inventor 杨广超李东森郭凯郭向阳
Owner 大连恒大高新材料开发有限公司