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PP material injection molding process and bottle cap prepared by same

A process and raw material technology, which is applied in the field of PP material injection molding process and its prepared bottle caps, can solve the adverse effects of PP plastic products on the tensile properties, the impaired compatibility of PP materials and nucleating agents, and the inconvenience of nucleating agent enhancement Effect and other problems, to improve the mechanical properties of the product, shorten the crystallization cycle, and improve the viscosity

Active Publication Date: 2020-11-06
YUYAO DANDAN SPRAYER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when more nucleating agents need to be added to prepare PP plastic products with high tensile strength, during the melting process of PP materials, PP materials change from solid substances to liquid substances, and the fluidity and adhesion of PP materials, etc. The performance will change to a certain extent, the compatibility between the PP material and the nucleating agent will be damaged, and the dispersion of the nucleating agent in the liquid PP material will be adversely affected to a certain extent, and it is not convenient to give full play to the nucleating agent. Reinforcement, which has a certain adverse effect on the tensile properties of PP plastic products

Method used

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  • PP material injection molding process and bottle cap prepared by same
  • PP material injection molding process and bottle cap prepared by same
  • PP material injection molding process and bottle cap prepared by same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: a kind of PP material injection molding process, comprises the following steps:

[0039] Preparation of S1 admixture: Weigh 0.15Kg acetylated distarch phosphate, add 0.3Kg sorbitol nucleating agent, 0.25Kg stearylamide and 0.15Kg microcrystalline paraffin, mix well, heat to 50°C for 3min, to room temperature to prepare the external mixture, pulverize the external mixture with a pulverizer, sieve with a sieve with a pore size of 50 μm, and crush the particles with a particle size greater than 50 μm until the particle size is not greater than 50 μm, and select the particle size not greater than 50 μm Granules to make admixtures.

[0040] S2 Mixing: Weigh 100Kg of PP granules, add the admixture prepared in step S1, and mix evenly to obtain a powder.

[0041] S3 melting: heating the powder prepared in step S2 to 195° C. to obtain a molten liquid.

[0042] S4 injection molding: Heat several standard 3025 mineral water bottle cap molds to 80°C, inject the molt...

Embodiment 2

[0046] The difference between embodiment 2 and embodiment 1 is that embodiment 2 does not add talcum powder, and others are consistent with embodiment 1.

Embodiment 3

[0048] The difference between embodiment 3 and embodiment 1 is that the admixture of embodiment 3 does not undergo the heating pretreatment process, embodiment 3 takes by weighing 0.15Kg acetylated distarch phosphate, adds 0.3Kg sorbitol nucleating agent, 0.25Kg Stearylamide and 0.15Kg microcrystalline paraffin are mixed homogeneously to prepare additive, and others are consistent with Example 1.

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Abstract

The invention discloses a PP material injection molding process and a bottle cap prepared through the PP material injection molding process, and relates to the technical field of plastic product preparation. The PP material injection molding process comprises the following steps: S1, preparation of an additive: weighing additive raw materials, and uniformly mixing the additive raw materials to prepare the additive; wherein the additive raw materials comprise acetylated distarch phosphate, a nucleating agent and a dispersing agent; S2, mixing: weighing PP particles, adding the additive preparedin the step S1, and uniformly mixing to obtain a powder; S3, melting: specifically, heating the powder prepared in the step S2 to 185-210 DEG C to prepare a molten liquid; S4, injection molding: specifically, injecting the molten liquid into a mold, maintaining the pressure to prepare a thermoplastic product; and S5, cooling molding: cooling the thermoplastic product prepared in the step S4 to 20-40 DEG C to prepare the PP plastic product. The PP material injection molding process has the advantage that the tensile property of a plastic product is conveniently improved. The bottle cap prepared by the PP material injection molding process has the advantage of good tensile property.

Description

technical field [0001] The invention relates to the technical field of plastic product preparation, in particular to a PP material injection molding process and a bottle cap prepared therefrom. Background technique [0002] PP (Polypropylene) material is widely used in industries such as packaging, construction and automotive due to its excellent chemical resistance, heat resistance and electrical insulation. PP material has excellent plasticity. During use, PP material is generally prepared into required plastic products by injection molding or compression molding. In the process of preparing PP materials into plastic products, it is necessary to melt the PP material into a liquid PP material melt, and then use a mold to make the liquid PP material melt into a solid plastic product. In order to shorten the molding and processing cycle of plastic products, it is generally necessary Nucleating agents are added to accelerate the crystallization of liquid PP material melts to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L3/06C08L91/06C08K5/20C08K5/053C08K3/34B29C45/00B29C45/77B29C45/78
CPCC08L23/12B29C45/0001B29C45/77B29C45/78B29K2023/12B29K2105/0005C08L3/06C08L91/06C08K5/20C08K5/053C08K3/34
Inventor 李再李甫
Owner YUYAO DANDAN SPRAYER CO LTD
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