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Fully-degradable polylactic acid fiber SMS compound non-woven and manufacturing method thereof

A technology of polylactic acid fibers and non-woven fabrics, which is applied in the directions of non-woven fabrics, fiber processing, textiles and paper making, etc., can solve problems such as unfavorable large-scale production, poor product stability, and improvement of polylactic acid characteristics.

Inactive Publication Date: 2010-10-06
豆丁乐园(南京)婴儿用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent ZL200410017776.0 introduces a kind of ultra-fine polylactic acid fiber nonwoven fabric, which is a nonwoven fabric made by melt-blown process. It does not improve the existing melt-blown equipment for the characteristics of polylactic acid. The products produced Poor stability
Liu Ya and others from Tianjin University of Technology have also produced PLA nonwoven fabrics for filter materials in the laboratory using the melt blown process, but the developed nonwoven fabrics will have broken filaments and filaments during production. Facilitate large-scale production

Method used

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  • Fully-degradable polylactic acid fiber SMS compound non-woven and manufacturing method thereof
  • Fully-degradable polylactic acid fiber SMS compound non-woven and manufacturing method thereof
  • Fully-degradable polylactic acid fiber SMS compound non-woven and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] (1) Polylactic acid chip SB8206 for spunbonding, with a molecular weight of about 120,000, a melt index of 30g / 10min at 210°C, a melting point of 185°C, and a thermal cracking temperature of 295°C; polylactic acid chip MB3602 for meltblown Type, the molecular weight is about 90,000, the melting index at 210°C is 70g / 10min, the melting point is 170°C, and the thermal cracking temperature is 325°C.

[0048] (2) Melt spinning by spunbond method. The polylactic acid slices are fed into the feeding hopper, and sent to the hot air drying equipment part of the spunbond production line through the pipeline, and the slices are dried by circulating high-temperature airflow, which can remove moisture in a short time, and the drying temperature is set at 80 ℃, the drying time is 6 hours, and the water content of the PLA slices after drying is below 100ppm; the dried polylactic acid slices are sent into the screw extruder through the filter device and metering pump, and the length-t...

Embodiment 2

[0059] (1) Polylactic acid chip SB8204 for spunbonding, with a molecular weight of about 150,000, a melt index of 25g / 10min at 210°C, a melting point of 185°C, and a thermal cracking temperature of 290°C; polylactic acid chip MB3604 for meltblown Type, the molecular weight is about 120,000, the melting index at 210°C is 85g / 10min, the melting point is 175°C, and the thermal cracking temperature is 295°C.

[0060] (2) Melt spinning by spunbond method. The polylactic acid slices are fed into the feeding hopper, and sent to the hot air drying equipment part of the spunbond production line through the pipeline, and the slices are dried by circulating high-temperature airflow, which can remove moisture in a short time, and the drying temperature is set at 80 ℃, the drying time is 5 hours, and the water content of the PLA slices after drying is below 100ppm; the dried polylactic acid slices are sent into the screw extruder, and the aspect ratio of the screw extruder is 33, and the f...

Embodiment 3

[0071] (1) Polylactic acid chip SB8200 for spunbonding, with a molecular weight of about 150,000, a melt index of 35g / 10min at 210°C, a melting point of 178°C, and a thermal cracking temperature of 275°C; polylactic acid chip MB3602 for meltblown Type, the molecular weight is about 140,000, the melting index at 210°C is 80g / 10min, the melting point is 165°C, and the thermal cracking temperature is 285°C.

[0072] (2) Melt spinning by spunbond method. The polylactic acid slices are fed into the feeding hopper, and sent to the hot air drying equipment part of the spunbond production line through the pipeline, and the slices are dried by circulating high-temperature airflow, which can remove moisture in a short time, and the drying temperature is set at 100 ℃, the drying time is 4 hours, and the water content of the PLA slices after drying is below 100ppm; the dried polylactic acid slices are sent into the screw extruder, and the aspect ratio of the screw extruder is 36, and the ...

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Abstract

The invention discloses a fully-degradable polylactic acid fiber SMS compound non-woven and a manufacturing method thereof. The non-woven is compounded by three layers of non-woven by self-bonding or hot rolling, wherein the middle layer is polylactic acid meltblown non-woven, and the upper layer and the lower layer of the middle layer are both polylactic acid spunbonded non-woven. The SMS non-woven is even and has stable quality and excellent physical property, filtering property and shielding property. A thin SMS product has favourable waterproof permeability and is especially suitable for the fields of hygienic materials, packaging materials and the like; an SMS product with medium thickness is suitable for the disposable products of the field of medical treatments, and a thick SMS product is suitable for the field of industrial filtering. The production technology of the invention is easy to operate and control, has favorable stability and can carry out industrial production.

Description

technical field [0001] The invention belongs to the field of textile material non-woven fabrics, and in particular relates to a fully degradable polylactic acid fiber SMS composite non-woven fabric product and a preparation process. Background technique [0002] Due to the double pressure from the increasing awareness of environmental protection and the depletion of non-renewable resources such as petroleum, the development and application of biodegradable materials has become one of the focuses of people's attention. Polylactic acid (PLA) is made from renewable resources such as corn, wheat and potatoes. Its products are environmentally friendly and can be completely degraded into CO after use. 2 and H 2 O, also has the ability of composting, so polylactic acid is an ideal degradable raw material. [0003] The United States, Japan and some developed countries in Europe are at the forefront of other countries in the research, development and application of polylactic acid ...

Claims

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Application Information

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IPC IPC(8): D04H3/10D01D5/08D01D5/098D01D5/088D01D1/06D04H3/14
Inventor 柳铭
Owner 豆丁乐园(南京)婴儿用品有限公司
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