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Preparation method of electret polylactic acid meltblown nonwoven material

A non-woven material, polylactic acid technology, used in non-woven fabrics, rayon manufacturing, textiles and papermaking, etc., can solve problems such as poor charge storage performance, and achieve the effect of improving service life, low energy consumption, and improving charge storage capacity.

Active Publication Date: 2019-06-21
广东东沁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention: Aiming at the problem of poor charge storage performance of existing electret polylactic acid melt-blown nonwoven materials, a preparation method of electret polylactic acid melt-blown nonwoven materials is provided

Method used

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  • Preparation method of electret polylactic acid meltblown nonwoven material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In parts by weight, weigh 20 parts of polytetrafluoroethylene, 1 part of nano-silicon nitride, 0.1 part of silane coupling agent KH-151, and 40 parts of deionized water, and mix nano-silicon nitride and silane coupling agent KH-151 Mix -151 with deionized water, stir magnetically at room temperature for 10 minutes at a stirring speed of 1500r / min to obtain a mixed solution, place the mixed solution in an ultrasonic cleaner for ultrasonic dispersion for 10 minutes to obtain a dispersion, filter to obtain a filter residue, and use Wash twice with deionized water, dry to constant weight at 60°C, and cool to room temperature to obtain the modified product. Mix the modified product and polytetrafluoroethylene in a high-speed food mixer to obtain a total The mixture is placed under a pressure of 30 MPa and pre-pressed for 10 minutes to obtain a pre-pressed product. The pre-pressed product is placed in a muffle furnace, and the temperature is raised to 100 ° C at a heating rate...

Embodiment 2

[0033] In parts by weight, weigh 25 parts of polytetrafluoroethylene, 3 parts of nano-silicon nitride, 0.2 parts of silane coupling agent KH-151, and 45 parts of deionized water, and mix nano-silicon nitride and silane coupling agent KH-151 -151 was mixed with deionized water, stirred magnetically at room temperature for 12min at a stirring speed of 1550r / min, and the mixed solution was obtained. The mixed solution was ultrasonically dispersed in an ultrasonic cleaner for 15min to obtain the dispersion, and filtered to obtain the filter residue, and used Wash 3 times with deionized water, dry to constant weight at 70°C, and cool to room temperature to obtain the modified product. Mix the modified product and polytetrafluoroethylene in a high-speed food mixer to obtain a total The mixture is placed under a pressure of 32 MPa and pre-pressed for 12 minutes to obtain a pre-pressed product. The pre-pressed product is placed in a muffle furnace, and the temperature is raised to 110 ...

Embodiment 3

[0035] In parts by weight, weigh 30 parts of polytetrafluoroethylene, 5 parts of nano-silicon nitride, 0.3 parts of silane coupling agent KH-151, and 50 parts of deionized water, and mix nano-silicon nitride and silane coupling agent KH-151 Mix -151 with deionized water, stir magnetically at room temperature for 15 minutes at a stirring speed of 1600r / min to obtain a mixed solution, place the mixed solution in an ultrasonic cleaner for ultrasonic dispersion for 20 minutes to obtain a dispersion, filter to obtain a filter residue, and use Wash with deionized water for 4 times, dry to constant weight at 80°C, and cool to room temperature to obtain the modified product. Mix the modified product and polytetrafluoroethylene in a high-speed food mixer to obtain a total The mixture is placed under a pressure of 35 MPa and pre-pressed for 15 minutes to obtain a pre-pressed product. The pre-pressed product is placed in a muffle furnace, and the temperature is raised to 120 ° C at a heat...

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Abstract

The invention relates to a preparation method of an electret polylactic acid meltblown nonwoven material, and belongs to the technical field of textile materials. According to the method, an inorganicelectret material nano silicon nitride and a polymer polytetrafluoroethylene are compounded to serve as a filler by means of a mechanical dispersion method, the charge storage capacity of the compound material can be effectively improved under a high-temperature or humid environment, the occurrence of an electret agglomeration phenomenon is avoided, and the service life of the product is prolonged; the compound filler and polylactic acid are meltblown and then subjected to treatment such as opening, impurity removal, combing, lapping, pre-needling, spunlacing and hot rolling, and the nonwovenmaterial is prepared. The method has the advantages that the inorganic electret material nano silicon nitride and the polymer polytetrafluoroethylene are compounded to serve as the filler by means ofthe mechanical dispersion method, and the charge storage capacity of the compound material can be effectively improved under the high-temperature or humid environment; the electret filler and the polylactic acid are compounded, so that the electrostatic potential of the surface of the polylactic acid nonwoven material is increased, and the charge storage capacity is improved.

Description

technical field [0001] The invention relates to a preparation method of an electret polylactic acid melt-blown nonwoven material, which belongs to the technical field of textile materials. Background technique [0002] The melt-blown method is a one-step process for producing non-woven materials. It melts the thermoplastic resin pellets and draws the ejected fibers under the action of high-speed hot air to make ultra-fine fibers, and then lays the net. A nonwoven material is obtained. Melt-blown nonwoven materials have the characteristics of low fiber fineness, good uniformity of fiber web, etc., and have a fluffy structure and good filtering performance. improve. Polypropylene has good charge storage capacity due to its structural characteristics. Therefore, it has become the main raw material for melt-blown nonwovens, and high polymers such as polyethylene and polyamide can also be used as raw materials. [0003] With the continuous improvement of human environmental pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/435D04H1/485D01F6/92D01F1/10
Inventor 黄淑枝
Owner 广东东沁新材料科技有限公司
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