A kind of PP material injection molding process and its prepared bottle cap

A process and raw material technology, applied in the field of PP material injection molding process and bottle caps prepared, can solve the adverse effects of tensile properties of PP plastic products, impaired compatibility between PP materials and nucleating agents, and inconvenient enhancement of nucleating agents It can improve the mechanical properties of the product, shorten the crystallization cycle, and improve the viscosity of the product.

Active Publication Date: 2022-07-01
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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  • A kind of PP material injection molding process and its prepared bottle cap
  • A kind of PP material injection molding process and its prepared bottle cap
  • A kind of PP material injection molding process and its prepared bottle cap

Examples

Experimental program
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Effect test

Embodiment 1

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

[0039] Preparation of S1 admixture: Weigh 0.15Kg of acetylated distarch phosphate, add 0.3Kg of sorbitol nucleating agent, 0.25Kg of stearamide and 0.15Kg of microcrystalline paraffin, mix well, heat to 50°C for pretreatment for 3min, reduce After reaching room temperature, the admixture was prepared, and the admixture was pulverized with a pulverizer, and sieved with a sieve with an aperture of 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 powder.

[0041] S3 melting: the powder obtained in step S2 is heated 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 melt into the 80 °C 3025 mineral water bottle cap mold with an injection molding machine at a pressure of 110 bar, and keep the pre...

Embodiment 2

[0046] The difference between Example 2 and Example 1 is that Example 2 does not add talc, and the others are consistent with Example 1.

Embodiment 3

[0048] The difference between Example 3 and Example 1 is that the admixture of Example 3 is not subjected to the heating pretreatment process, and Example 3 weighs 0.15Kg of acetylated distarch phosphate, adds 0.3Kg of sorbitol nucleating agent, 0.25Kg Stearamide and 0.15Kg of microcrystalline paraffin were mixed uniformly to prepare an admixture, and the others were consistent with Example 1.

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Abstract

The invention discloses a PP material injection molding process and a bottle cap prepared therefrom, and relates to the technical field of plastic product preparation; a PP material injection molding process includes the following steps: S1 admixture preparation: weighing the admixture raw materials, mixing uniformly, The admixture is prepared; the raw material of the admixture includes acetylated distarch phosphate, nucleating agent and dispersant; S2 mixing: weighing PP particles, adding the admixture prepared in step S1, mixing uniformly to obtain powder S3 melting: the powder obtained in step S2 is heated to 185 ℃-210 ℃ to obtain molten liquid; S4 injection molding: the molten liquid is injected into the mold, and the pressure is maintained to obtain a thermoplastic product; S5 cooling molding: the step The thermoplastic product prepared by S4 is cooled to 20°C-40°C to obtain a PP plastic product. The injection molding process of PP material has the advantage of improving the tensile properties of plastic products. The bottle cap prepared by the injection molding process of PP material has the advantage of good tensile properties.

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 packaging, construction and automotive industries due to its excellent chemical resistance, heat resistance and electrical insulation. PP material has excellent plasticity. During use, PP material is generally prepared into desired plastic products by injection molding or compression molding. In the process of preparing PP materials into plastic products, it is necessary to first 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 cycle of plastic products, it is generally necessary to Adding a nucleating agent to accelerate the crystallization of the liquid PP material melt to form a solid p...

Claims

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Application Information

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Patent Type & Authority Patents(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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