A kind of polypropylene material with high cracking rate and high melting index and its preparation method and application

A polypropylene material and cracking rate technology, applied in the field of materials, can solve the problems of large melt index fluctuation, difficult for downstream customers to accept, large odor, etc., and achieve the effect of narrow molecular weight distribution, good melt index stability and low volatile content.

Active Publication Date: 2021-09-17
东华能源(张家港)新材料有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large number of molecular weight regulators are used in the production process of meltblown polypropylene. Due to the immature production process, the molecular weight regulators in the meltblown polypropylene material have large residues, large fluctuations in melt index, high ash content, and strong odor, so it is difficult to be downstream. Customer accepts

Method used

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  • A kind of polypropylene material with high cracking rate and high melting index and its preparation method and application
  • A kind of polypropylene material with high cracking rate and high melting index and its preparation method and application
  • A kind of polypropylene material with high cracking rate and high melting index and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A high cracking rate and high melting point polypropylene material, the components include:

[0035] In order to realize the development of special materials for melt-blown polypropylene with high cracking rate and high melt index, the present invention adopts the following technical process route:

[0036] (1) Mix the polypropylene, molecular weight modifier and stabilizer in a high-speed mixer in proportion to obtain a mixture.

[0037] (2) Feed the mixture obtained in step (1) through the main feeding port of the twin-screw extruder, adjust the extruder speed and extrusion temperature, and cool the pelletizer in a water tank to obtain granular modified polypropylene Material.

[0038] See Table 1 below for the relevant process parameters in formula weighing and extrusion granulation of Examples 1-6 and Comparative Examples 1-3.

[0039] Table 1

[0040]

[0041] Various performance tests are carried out according to the following standards:

[0042] The melt f...

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PUM

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Abstract

The invention discloses a polypropylene material with high cracking rate and high melting index and its preparation method and application. The raw material of the polypropylene material with high cracking rate and high melting index includes the following components in parts by weight: 100 parts of homopolypropylene ; 0.4-8 parts of molecular weight regulator; 0.1-1 part of stabilizer. By mixing homopolypropylene, molecular weight regulator, and stabilizer in proportion, and then extruding through twin-screw, adjusting the screw speed and increasing the extrusion temperature, a special material for melt-blown polypropylene with high cracking rate and high melt index is obtained. The product meets the requirements of Good melt index stability, low ash content, low volatile matter, and narrow molecular weight distribution make the material widely used in the downstream melt blown cloth field.

Description

technical field [0001] The invention relates to a polypropylene material with high cracking rate and high melting index, a preparation method and application thereof, and belongs to the field of material technology. Background technique [0002] Polypropylene melt-blown nonwovens are made of polypropylene, and the diameter of the fibers is 1-5 microns. The ultrafine fiber structure of the nonwovens increases the number and surface area of ​​fibers per unit area. The rate is very high, so the melt-blown cloth has good filterability, heat insulation and oil absorption. After electret treatment, the melt-blown cloth can effectively absorb particles and bacteria in the air and prevent viruses from infecting people. It can be widely used in the inner layer of masks, filter elements and other materials. [0003] Polypropylene melt-blown special materials mainly use polypropylene as raw material, and the fluidity and molecular weight distribution of the material are controlled by ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C08L23/12C08K5/134C08K5/526C08K5/14D01F6/46D01F1/10D04H1/4291
CPCC08K5/1345C08K5/14C08K5/526C08L2203/12D01F1/10D01F6/46D04H1/4291C08L23/12
Inventor王红英李建华孙灿乾熊张军吴梁锋汪诗平崔寅鑫黄剑陈海斌王娟褚钰宇薛宏魁吴佳亮王耀华
Owner东华能源(张家港)新材料有限公司