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High-temperature-resistant polylactic acid melt-blow electret non-woven filter material and preparation method and application thereof

A filter material, polylactic acid technology, applied in non-woven fabrics, separation methods, filtration and separation, etc., can solve problems such as affecting performance, cumbersome process, complicated process, etc., to improve filtration efficiency, simplify production process, and achieve good size The effect of stability

Active Publication Date: 2018-10-26
上海精发实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two problems about polylactic acid melt-blown nonwoven filter materials in the market: one is that functional additives are added to polylactic acid raw materials to improve its electret performance, thereby improving the filtration performance of the material, but this preparation method The process is complicated and cumbersome; the second is that the high temperature dimensional stability of the polylactic acid nonwoven material produced by the meltblown process is poor, and it will shrink significantly at 70°C, which will affect its performance

Method used

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  • High-temperature-resistant polylactic acid melt-blow electret non-woven filter material and preparation method and application thereof
  • High-temperature-resistant polylactic acid melt-blow electret non-woven filter material and preparation method and application thereof

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Effect test

Embodiment 1

[0032] The production of the embodiment of the present invention mainly includes the following steps:

[0033] (1) Place the polylactic acid chips in the air at a temperature of 80°C for 12 hours.

[0034] (2) Place the polylactic acid slices dried in step (1) in the feeding hopper of the screw and cover and seal to isolate the outside air. The screw temperature is set as follows: the temperature of the first zone is 230°C, the temperature of the second zone is 235°C, the temperature of the third zone is 235°C, the temperature of the fourth zone is 235°C, the filter temperature is 235°C, the metering pump temperature is 240°C, The head temperature is 240°C, the hot air temperature is 260°C, the hot air pressure is 0.095MPa, the receiving distance is 10.5cm, and the spinning pressure is 0.92MPa. The rotating speed of the metering pump is 3 rpm, the web-laying speed is 5.74 Hz, the product width is 30 cm, and the average fiber diameter is 6 μm.

[0035] (3) The meltblown nonwoven fab...

Embodiment 2

[0038] The production of the embodiment of the present invention mainly includes the following steps:

[0039] (1) Place the polylactic acid chips in the air at a temperature of 80°C for 12 hours.

[0040] (2) Place the polylactic acid slices dried in step (1) in the feeding hopper of the screw and cover and seal to isolate the outside air. The screw temperature is set as follows: the temperature of the first zone is 230°C, the temperature of the second zone is 235°C, the temperature of the third zone is 235°C, the temperature of the fourth zone is 235°C, the filter temperature is 235°C, the metering pump temperature is 240°C, The head temperature is 240°C, the hot air temperature is 260°C, the hot air pressure is 0.095MPa, the receiving distance is 10.5cm, the spinning pressure is 0.92MPa, the metering pump speed is 3rpm, the web speed is 5.74Hz, the product width It is 30cm and the average fiber diameter is 6μm.

[0041] (3) Send the meltblown nonwoven fabric prepared in step (2)...

Embodiment 3

[0045] (1) Place the polylactic acid chips in the air at a temperature of 80°C for 12 hours.

[0046] (2) Place the polylactic acid slices dried in step (1) in the feeding hopper of the screw and cover and seal to isolate the outside air. The screw temperature is set as follows: the temperature of the first zone is 230℃, the temperature of the second zone is 235℃, the temperature of the third zone is 235℃, the temperature of the fourth zone is 235℃, the filter temperature is 235℃, the metering pump temperature is 240℃, The head temperature is 240°C, the hot air temperature is 260°C, the hot air pressure is 0.095MPa, the spinning distance is 10.5cm, the spinning pressure is 0.92MPa, the metering pump speed is 3rpm, and the web speed is 5.74Hz. The width is 30 cm, and the average fiber diameter is 6 μm.

[0047] (3) The meltblown nonwoven fabric prepared in step (2) is fed into a heat setting device. The surface temperature of the heating roller of the heat setting device is 130°C, ...

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Abstract

The invention provides a high-temperature-resistant polylactic acid melt-blow electret non-woven filter material and a preparation method and application thereof. The preparation method at least includes: a polylactic acid raw material without auxiliaries is subjected to a melt-blow process and high-voltage corona electret processing. The material prepared by the method does not need the adding offunctional auxiliaries and does not need granulation, and the production process is simplified.

Description

Technical field [0001] The invention relates to a high-temperature resistant polylactic acid melt-blown electret non-woven filter material and a preparation method and application thereof. Background technique [0002] As the government and the public have increasingly strong demands for environmental protection, polylactic acid has attracted much attention as a non-toxic, harmless, and completely natural-degradable green environmental protection material. The preparation of polylactic acid meltblown electret nonwoven filter material has been reported for a long time. At present, the preparation method of this industry mainly includes the following steps: the polylactic acid is melt-blown processing technology, and then corona electret treatment, such as patent CN103061038A After modification and granulation by adding tourmaline and additives to polylactic acid, it is melt-blown and corona electret made into an efficient and environmentally friendly filter material; patent CN1074...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/011D06C7/02D06M10/02B01D39/16
CPCB01D39/16B01D2239/0618B01D2239/0622B01D2239/10D04H3/011D06C7/02D06M10/025
Inventor 孙乐乐陈立东陈连忠徐克勤濮颖军陈致帆杨占元高丰和吴建军程茂芸朱德洪
Owner 上海精发实业有限公司
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