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Ultrahigh-fluidity polypropylene melt-blown special material and preparation method thereof

A polypropylene melt-blown and fluidity technology, applied in the field of modified plastics, can solve the problems of unsatisfactory environmental protection of the preparation process, wide product molecular weight distribution, and unfavorable production of melt-blown cloth, so as to achieve no residue of other products, excellent spinning Silk performance, low ash effect

Pending Publication Date: 2021-02-02
重庆科聚孚新材料有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The raw material of melt-blown non-woven fabric is ultra-high fluidity polypropylene melt-blown special material. There are roughly three preparation methods. One is to use a specific metallocene catalyst for direct polymerization. The melt-blown material prepared by this method has excellent processing stability. Sex, lower odor, and better flexibility of the produced fiber, but the high cost of the catalyst leads to high product price; the second is to adjust the amount of hydrogenation to synthesize during the polymerization of propylene monomer, that is, the hydrogenation method (hydrogen adjustment method)
The melt-blown material prepared by this method has no peculiar smell and no peroxide residue. The product is powder and is easily polluted, and the molecular weight of the polymer can only be controlled within a certain range. The molecular weight distribution of the product is wide, which is not conducive to the production of melt-blown cloth. The third is the chemical degradation method, that is, the controllable degradation of the peroxide free radical initiator is used to obtain the ultra-high fluidity polypropylene melt-blown material
The production cost of this method is low, and it is convenient to adjust different melt index ranges, but it is necessary to use homopolymer polypropylene with a medium melt flow rate (about 30g / 10min) or a high melt flow rate to obtain a qualified melt blown material, resulting in Raw materials are scarce, and the existing preparation process for polypropylene meltblown special materials is not ideal for environmental protection

Method used

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  • Ultrahigh-fluidity polypropylene melt-blown special material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The special material for ultra-high fluidity polypropylene melt blown in this embodiment, the raw materials include the following components by weight: 99.4 parts of homopolypropylene resin, 0.4 parts of viscosity adjustment additive, 0.1 part of antioxidant, and 0.1 part of lubricant; The melt flow rate of the homopolypropylene resin is 0.5-5g / 10min.

[0027] In this embodiment, the viscosity adjusting aid is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, and the antioxidant is tetrakis[β-(3,5-di-tert- Butyl-4-hydroxyphenyl) propionate] pentaerythritol ester.

[0028] In this embodiment, the lubricant is paraffin. In this embodiment, the paraffin is replaced by microcrystalline paraffin, oleic acid amide, erucamide, ethylene bisstearamide, calcium stearate, hard One of zinc stearates, or a mixture of paraffin and microcrystalline paraffin, oleic acid amide, erucic acid amide, ethylene bisstearamide, calcium stearate, zinc stearate, all get qualified products.

[0029]...

Embodiment 2

[0034] The special material for ultra-high fluidity polypropylene melt blown in this embodiment, the raw materials include the following components by weight: 99.3 parts of homopolypropylene resin, 0.5 part of viscosity adjustment additive, 0.1 part of antioxidant, and 0.1 part of lubricant; The melt flow rate of the homopolypropylene resin is 0.5-5g / 10min.

[0035] In this embodiment, the viscosity adjusting aid is 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, and the antioxidant is tetrakis[β-(3,5-di-tert- Butyl-4-hydroxyphenyl) propionate] pentaerythritol ester.

[0036] In this embodiment, the lubricant is oleic acid amide. In this embodiment, oleic acid amide is replaced by microcrystalline paraffin, paraffin, erucamide, ethylene bisstearamide, calcium stearate , zinc stearate, or a mixture of oleic acid amide and microcrystalline paraffin, paraffin, erucamide, ethylene bisstearamide, calcium stearate, zinc stearate, all qualified products .

[0037] Its preparation me...

Embodiment 3

[0042] The special material for ultra-high fluidity polypropylene melt blown in this embodiment, the raw materials include the following components by weight: 98.7 parts of homopolypropylene resin, 0.6 parts of viscosity adjustment additive, 0.1 part of antioxidant, 0.2 part of lubricant, 0.2 parts of nucleating agent, 0.2 parts of electret auxiliary agent; the melt flow rate of the homopolypropylene resin is 0.5-5g / 10min.

[0043] In this embodiment, the viscosity adjusting aid is di-tert-butyl peroxide. In this embodiment, di-tert-butyl peroxide is replaced by peroxy-2-ethylhexanoic acid tert-butyl One of esters, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, dicumylbenzene di-tert-butylperoxide, or replaced by di-tert-butylperoxide Compounds with peroxy-2-ethylhexanoic acid tert-butyl ester, 2,5-dimethyl-2,5-bis(peroxy-tert-butyl)hexane, bis-tert-butylperoxydiisopropylbenzene Mixtures were obtained as qualified products.

[0044] In this embodiment, the antioxidant is tetr...

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Abstract

The invention discloses an ultrahigh-fluidity polypropylene special melt-blown polypropylene material. The special melt-blown polypropylene material is prepared from the following raw materials in parts by weight: 96.4-99.55 parts of homo-polypropylene resin, 0.3-1 part of a viscosity adjusting aid, 0.05-0.2 part of an antioxidant, 0.1-0.4 part of a lubricant, 0-1 part of a nucleating agent and 0-1 part of an electret aid, wherein the melt flow rate of the homo-polypropylene resin is 0.5-5 g / 10 min. The ultrahigh-fluidity polypropylene melt-blown special material which has the characteristicsof stable high fluidity, narrow molecular weight distribution, low ash content, low odor, no other product residues, good fiber flexibility, excellent spinning performance and the like is prepared from homo-polypropylene at a low melt flow rate, raw materials are easy to obtain, the cost is low, a qualified product can be obtained by adopting a common double-screw extruder through two-step processing, and the preparation method is simple and high in environmental protection property.

Description

technical field [0001] The invention relates to the technical field of modified plastics, in particular to a special material for ultra-high fluidity polypropylene melt blown and a preparation method thereof. Background technique [0002] Masks have a certain filtering effect on the air entering the lungs. When respiratory infectious diseases are prevalent, wearing a mask has a very good effect when working in a polluted environment such as dust. The middle layer of the mask is used to filter dust and bacteria. It is an extremely fine and electrostatically charged melt-blown cloth, which is the most important barrier layer. When dust, droplets containing bacteria and viruses approach the melt-blown non-woven fabric, they will be electrostatically adsorbed on the surface of the melt-blown fabric and cannot pass through. The manufacturing method of melt-blown non-woven fabric is that polypropylene is melted by a high-speed small nozzle, and ultra-fine polypropylene short fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L91/06C08K13/02C08K5/14C08K5/20C08K5/098C08K3/38C08K3/36
CPCC08L23/12C08K5/14C08K5/20C08K13/02C08K3/38C08K3/36C08K5/098C08L2203/12C08L91/06
Inventor 陈健刘罡苏俊业叶淑英周雷吕强肖利群李福顺刘小林
Owner 重庆科聚孚新材料有限责任公司
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