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Modified polypropylene mother particle for melt spray, its preparation method and use

A polypropylene modification technology, applied in textiles, papermaking, fiber treatment, etc., can solve problems such as attenuation, disappearance, impact on product range and life, and achieve high filtration efficiency and high temperature resistance

Inactive Publication Date: 2006-01-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many reports about electret melt-blown nonwovens, there are still obvious shortcomings in this type of products: the electret charge storage performance is poor, especially when used in high temperature or high humidity environments, The electret charge in polar melt-blown nonwovens will soon decay or even disappear, losing the function of electrostatic adsorption and cannot be used for liquid filtration, which affects the range of use and life of the product
But they mainly use the prepared fiber to release negative ion fabrics, and there are no related reports for melt-blown nonwovens electret filter materials

Method used

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  • Modified polypropylene mother particle for melt spray, its preparation method and use
  • Modified polypropylene mother particle for melt spray, its preparation method and use

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preparation example Construction

[0027] The invention simultaneously designs a preparation method of the modified polypropylene masterbatch for melt blowing. The preparation method is manufactured according to the modified polypropylene masterbatch formula of the present invention, comprising the steps of:

[0028] (1) Tourmaline surface modification: first dilute the coupling agent with a diluent petroleum ether that is 1 to 3 times the required volume, and then add the auxiliary coupling agent, dispersant and antioxidant according to the stated ratio Mix evenly with the tourmaline in a high-speed mixer to modify the surface of the tourmaline; the average particle size of the tourmaline particles is 0.2 to 0.5 microns;

[0029] (2) Vacuum drying: at a temperature of 100-110°C, vacuum-dry the modified tourmaline particles for 1.5-2.5 hours;

[0030] (3) Mixing and melting granulation: mix the dried and modified tourmaline particles with the polypropylene chips at a ratio of 15:85 to 30:70, preferably 20:80, ...

Embodiment 1

[0044] (1) Tourmaline surface modification: first pour 17 parts by weight of tourmaline particles and 1 part by weight of low molecular weight polyethylene wax and 0.002 part of antioxidant 1010 powder into a high-speed mixer, and stir at 2500r / min for 5 Minutes; then add 2 parts by weight of titanate diluted in twice the volume of titanate as a coupling agent in petroleum ether to the high-speed mixer three times, each time adding the coupling agent at an interval of 10 minutes, and fully stir evenly. stone surface modification;

[0045] (2) Vacuum drying: vacuum drying at 105° C. for 2 hours.

[0046] (3) Blending and granulation: Pour the dry modified tourmaline particles and 80 parts by weight of melt-blown polypropylene slices into a high-speed mixer and mix again for 10 minutes, and finally add the mixed raw materials into the twin-screw compounding extrusion Under-machine melt extrusion, the process parameters are: the temperature (℃) of each zone is: zone 1: 115℃; zon...

Embodiment 2

[0048] (1) According to the method of embodiment 1, the modified polypropylene masterbatch for melt-blowing is produced.

[0049] (2) Vacuum drying: vacuum drying at 110° C. for 1.5 hours.

[0050] (3) Mixing and melting granulation: After mixing 25 parts by weight of modified polypropylene masterbatch for melt blown with 75 parts by weight of polypropylene slices, they are added to a twin-screw extruder for melt extrusion. The process parameters are : The temperature in each zone (℃) is zone 1: 160℃; zone 2: 180℃; zone 3: 220℃; zone 4: 250℃; die head temperature: 250℃; Fibers with a diameter of 2 to 5 μm pass through two strands at a temperature of 260°C and a wind speed of 1500m 3 / h high-speed hot air flow stretching, the ejected fibers fall on the receiving device to form a fiber web, and the melt flow is controlled by adjusting the metering pump to make the fiber web weight up to 100g / cm 2 ; Subsequently, the fiber web is transported to the 10kv high-voltage electric fi...

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Abstract

The present invention relates to a modified polypropylene mother granule for melt-blowing process, its preparation method and application technique. Its composition contains (by wt %) 70-85% of polypropylene, 14-27% of tourmaline and 1-3% of adjuvant. The described polypropylene is a low molecular weight melt-blowing polypropylene resin, the average grain size of tourmaline is less than 0.5 microns, and the adjuvant includes coupling agent, dispersing agent and antioxidant. Its preparation method includes the steps of surface modification of tourmaline, vacuum drying and meltblending and granulating, etc.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, specifically a modified polypropylene masterbatch for melt-blowing and its preparation method and application technology. The international patent classification number is intended 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] As a filter material for air...

Claims

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Application Information

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IPC IPC(8): D06M15/21
Inventor 程博闻焦晓宁康卫民张桂芳任元林刘亚丁长坤
Owner TIANJIN POLYTECHNIC UNIV
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