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High temperature resistant polylactic acid melt-blown electret nonwoven filter material and its preparation method and application

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

Active Publication Date: 2021-07-13
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-blown electret nonwoven filter material and its preparation method and application
  • High temperature resistant polylactic acid melt-blown electret nonwoven filter material and its preparation method and application

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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) Dry the polylactic acid slices under air conditions 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 seal with a cover to isolate the outside air. The temperature of the screw 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 temperature of the filter is 235°C, the temperature of the metering pump is 240°C, the mold 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 speed of the metering pump is 3 rpm, the web laying speed is 5.74 Hz, the width of the product is 30 cm, and the average fiber diameter ...

Embodiment 2

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

[0039] (1) Dry the polylactic acid slices under air conditions 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 seal with a cover to isolate the outside air. The temperature of the screw 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 temperature of the filter is 235°C, the temperature of the metering pump is 240°C, the mold Head temperature is 240°C, hot air temperature is 260°C, hot air pressure is 0.095MPa, receiving distance is 10.5cm, spinning pressure is 0.92MPa, metering pump speed is 3rpm, web laying speed is 5.74Hz, the product width is 30cm, and the average fiber diameter is 6μm.

[0041] (3) The melt-blown nonwoven fab...

Embodiment 3

[0045] (1) Dry the polylactic acid slices under air conditions 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 seal with a cover to isolate the outside air. The temperature of the screw 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 temperature of the filter is 235°C, the temperature of the metering pump is 240°C, the mold 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 laying speed is 5.74Hz. The width is 30 cm, and the average fiber diameter is 6 μm.

[0047] (3) The melt-blown nonwoven fabric prepared in step (2) is sent to a heat-setting device, the surface temperature of...

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Abstract

The invention provides a high-temperature-resistant polylactic acid melt-blown electret nonwoven filter material and its preparation method and application. Corona electret treatment. The material prepared by the method does not need to add any functional additives, and does not need to be granulated, which simplifies the production process.

Description

technical field [0001] The invention relates to a high-temperature-resistant polylactic acid melt-blown electret nonwoven filter material and a preparation method and application thereof. Background technique [0002] As the government and the public's demand for environmental protection is becoming stronger and stronger, polylactic acid, as a non-toxic, harmless, and completely naturally degradable green environmental protection material, has attracted much attention. The preparation of polylactic acid melt-blown electret non-woven filter material has been reported for a long time. At present, the preparation method in this industry mainly includes the following steps: melt-blown polylactic acid and then corona electret treatment, such as patent CN103061038A After modifying and granulating polylactic acid by adding tourmaline and additives, a high-efficiency and environmentally friendly filter material is made after melt blown and corona electret; patent CN107475892A adds p...

Claims

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Application Information

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Patent Type & Authority Patents(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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