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Electret polypropylene melt-blown nonwovens and method for preparation

A polypropylene melt-blown, non-woven fabric technology, applied in the field of non-woven fabrics, can solve problems such as inability to use liquid filtration, unsuitable for use, etc., to achieve the effect of ensuring quality, stable quality, and mature technology

Inactive Publication Date: 2004-11-10
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although there are many reports about electret meltblown nonwovens, there are still obvious shortcomings in this type of products: it is not suitable for use in high temperature or high humidity environments, and cannot be used for liquid filtration.
[0009] Adding inorganic tourmaline particles to polypropylene meltblown nonwovens, and then charging the nonwovens to make composite electret polypropylene meltblown nonwovens has not been reported yet

Method used

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  • Electret polypropylene melt-blown nonwovens and method for preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0057] (1) Manufacture of tourmaline polypropylene masterbatch

[0058] First, 100 parts by weight of tourmaline particles, 4.5 parts by weight of low molecular weight polyethylene wax and 0.1% of antioxidant 1010 powder are poured into a high-speed mixer, and stirred for 5 minutes at a speed of 2500r / min; then 10 parts by weight of titanic acid The coupling agent diluted in petroleum ether with twice the volume of titanate was added to the high-speed mixer three times, stirring for 10 minutes between each time; it was taken out and vacuum-dried at about 100°C for 2 hours.

[0059] Next, pour the modified tourmaline particles and 400 parts by weight of polypropylene slices into a high-speed mixer and mix again for 10 minutes. Finally, put the mixed raw materials into a twin-screw compounding extruder and melt them at a temperature of about 150°C. Extruded, cooled in a water bath, cut into tourmaline polypropylene masterbatch.

[0060] (2) Manufacture of electret polypropylene...

Embodiment 2～9

[0065] In Examples 2 to 9, Examples 3 and 4 are examples of electret polypropylene melt-blown nonwovens of the present invention, which are designed for filtering liquids; Describe the embodiment of composite electret polypropylene melt blown nonwoven fabric; And embodiment 7,8,9 then is the general polypropylene melt blown that compares with the electret polypropylene melt blown nonwoven fabric of the present invention Examples of nonwoven fabrics, but the process of Examples 2 to 9 is basically the same as that of Example 1, except that the processing conditions or parameters are different. For clarity, the specific process conditions or parameters of Examples 2-9 are listed in Table 1 uniformly.

[0066] The specific process data sheet of table 1 embodiment 2-9

[0067]

[0068] ★Percentage of tourmaline weight ●Multiple of volume of coupling agent ▲Refers to filtration efficiency after heat treatment, heat treatment temperature 80℃, relative humidity 80%...

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Abstract

The invention relates to an electret polypropylene melt-spray nonwoven cloth and its making method, the components in weight percent: polypropylene 95-97%, and tourmaline 3-5% with average particle size not greater than 0.5mum; its making method: (1) uniformly mixing and fusing the tourmaline particles and the polypropylene slices to make particles; the assistants of making the tourmaline particles in weight percent: coupling agent 3-10%; dispersant 2-5% and chemical inhibitor 0.01-0.1%; (2) uniformly mixing, fusing and extruding the particles with the polypropylene slices, stretching under the high-speed hot air flow to make the product. The product has better adaptability to high temperature and high humidity environment, can be used in filtering liquid; the making method has the characters of simple technique, no special devices, easy industrialized implementation, etc.

Description

technical field [0001] The invention relates to nonwoven fabric technology, specifically a kind of electret polypropylene melt-blown nonwoven fabric and its manufacturing method technology, and the international patent classification number is proposed to be Int.C1 7 D06M 11 / 00. Background technique [0002] With the development of the economy and the improvement of people's living standards, people's requirements for environmental quality are getting higher and higher. However, due to the rapid development of industrial and agricultural production worldwide, the pollution of human living environment has been aggravated. Among them, dust, bacteria and viruses in the air, heavy metal ions and microorganisms in water all pose a great threat to human health. How to deal with these pollutions, purify air and water resources, and effectively prevent and control germs are important issues to be solved urgently. [0003] Fiber filter material is a common material for dealing wit...

Claims

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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Application Information

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IPC IPC(8): D01F1/09D01F6/06D06M11/00
Inventor 程博闻康卫民
Owner TIANJIN POLYTECHNIC UNIV
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