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Preparation method of polypropylene plastic particles

A technology of polypropylene plastic and polypropylene, which is applied in the field of preparation of polypropylene plastic particles, can solve problems such as poor compatibility and lack of performance of polypropylene plastic particles, and achieve enhanced toughness, improved compatibility and binding force, and improved Effect of grafting depth

Inactive Publication Date: 2020-08-25
马健珂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compound antibacterial agent and nano antibacterial particles are inorganic substances, which have poor compatibility with the polypropylene matrix, so that the obtained polypropylene plastic particles are still lacking in performance.

Method used

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  • Preparation method of polypropylene plastic particles
  • Preparation method of polypropylene plastic particles

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preparation example Construction

[0026] A method for preparing polypropylene plastic particles. The polypropylene plastic particles are made of the following raw materials in parts by weight: 100-120 parts of modified polypropylene, 16-20 parts of talcum powder, 10-15 parts of flame retardant, antibacterial 3-5 parts of agent, 2-3 parts of calcium stearate, 4-8 parts of dispersant;

[0027] The dispersant is liquid paraffin;

[0028] The particle size of talc powder is 4-5um; when talc powder is melt-blended with PP, talc powder in this particle size range can not only enhance the rigidity of PP, but also enhance the toughness of PP. The enhancement of PP rigidity is the reinforcing effect of inorganic fillers. There are two reasons for increasing the toughness of PP: on the one hand, the particle size of talc powder is small, and the talc powder particles are easy to move; The generation of voids is manifested in the improvement of toughness; under the promotion of calcium stearate and dispersant, the dispe...

Embodiment 1

[0045] A polypropylene plastic particle is made of the following raw materials in parts by weight: 100 parts of modified polypropylene, 16 parts of talcum powder, 10 parts of flame retardant, 3 parts of bacteriostatic agent, 2 parts of calcium stearate, and 4 parts of dispersant ;

[0046] The polypropylene plastic particles are made by the following steps:

[0047] S1. Mix the modified polypropylene, talcum powder, calcium stearate and dispersant according to the formula, stir at 120r / min for 9min, and mix evenly;

[0048] S2. Add a flame retardant and a bacteriostat to the above mixture, first stir and mix at 300r / min for 4.5min, then increase the speed to 1100r / min and stir for 2.5min to obtain a blend;

[0049] S3. Put the blend into a twin-screw extruder, melt blend, extrude, and granulate to obtain polypropylene plastic particles.

Embodiment 2

[0051] A polypropylene plastic particle is made of the following raw materials in parts by weight: 110 parts of modified polypropylene, 18 parts of talcum powder, 13 parts of flame retardant, 4 parts of bacteriostatic agent, 2.5 parts of calcium stearate, and 6 parts of dispersant ;

[0052] The polypropylene plastic particles are made by the following steps:

[0053] S1. Mix the modified polypropylene, talcum powder, calcium stearate and dispersant according to the formula, stir at 125r / min for 10min, and mix evenly;

[0054] S2. Add a flame retardant and a bacteriostat to the above mixture, first stir and mix at 300r / min for 4.5min, then increase the speed to 1100r / min and stir for 2.5min to obtain a blend;

[0055] S3. Put the blend into a twin-screw extruder, melt blend, extrude, and granulate to obtain polypropylene plastic particles.

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Abstract

The invention discloses a preparation method of polypropylene plastic particles. The polypropylene plastic particles are prepared from the following raw materials in parts by weight: 100-120 parts ofmodified polypropylene, 16-20 parts of talcum powder, 10-15 parts of a flame retardant, 3-5 parts of a bacteriostatic agent, 2-3 parts of calcium stearate and 4-8 parts of a dispersing agent. The preparation method comprises the following steps: uniformly mixing the substances according to the formula ratio, and then carrying out melt blending, extrusion and granulation. According to the invention, the modified polypropylene is used as a plastic matrix, has higher impact resistance, and is grafted with -COOH functional groups, so that the compatibility and binding force of the matrix with theflame retardant and the bacteriostatic agent can be increased, the flame retardant, the bacteriostatic agent and the like are uniformly dispersed in the matrix, and the polypropylene particles are endowed with good flame retardance and bacteriostatic performance; and through auxiliary matching of talcum powder and calcium stearate with specific particle sizes, the rigidity of PP can be improved, the toughness of polypropylene can also be improved, and the polypropylene plastic which is excellent in mechanical property and has flame-retardant and antibacterial functions is obtained.

Description

technical field [0001] The invention belongs to the field of polypropylene plastics, and in particular relates to a preparation method of polypropylene plastic particles. Background technique [0002] Polypropylene, referred to as PP, is a colorless, odorless, non-toxic, translucent solid substance. Polypropylene (PP) is a thermoplastic synthetic resin with excellent performance, which is a colorless and translucent thermoplastic lightweight general-purpose plastic. With chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear-resistant processing properties, etc., polypropylene has been rapidly used in machinery, automobiles, electronic appliances, construction, textiles, and packaging since its inception. It has been widely developed and applied in many fields such as agriculture, forestry, fishery and food industry. When using polypropylene plastic products for children's toys, it is necessary to solve the probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08L91/06C08K13/02C08K3/34C08K5/098C08K5/5399C08K3/015C08K3/08C08F255/02C08F220/04C08F2/00
CPCC08F2/00C08F255/02C08K2003/0806C08K2201/005C08L51/06C08L2201/02C08F220/04C08L91/06C08K13/02C08K3/34C08K5/098C08K5/0066C08K5/5399C08K3/015C08K3/08
Inventor 马健珂丁贤麟刘永利
Owner 马健珂
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