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Night-light plastic injection-molding part preparation method

A technology for injection molded parts and plastics, which is applied in the field of preparation of luminous plastic injection molded parts, can solve problems such as blackening, and achieve the effects of long luminescence time, stable luminescence, environmental protection and pollution-free luminescence.

Inactive Publication Date: 2014-01-15
NINGBO DEMING LUMINOUS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the luminous powder is mixed with these plastic materials and injected, due to the relatively high hardness of the luminous powder, friction will occur during the contact with the metal, and the oxide layer on the metal surface is black. After friction, it is mixed into the product for use. It turns black, and the higher the temperature, the worse this phenomenon is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of a luminous plastic injection molded part provided by the present invention comprises 85 parts by weight of plastic masterbatch, 10 parts of photo-induced energy storage long-lasting luminous powder, 10 parts of nano-silica, 5 parts of diffusion oil or The raw material of white oil composition, preparation steps are as follows:

[0015] A. Dry the plastic masterbatch at 80°C~100°C for 2 hours to 4 hours, and control the moisture content below 0.05%;

[0016] B. Stir the prepared amount of light-induced energy storage long-lasting luminous powder and nano-silicon dioxide with diffusion oil or white mineral oil into a paste, then mix it with plastic in a ceramic mixing container and stir evenly;

[0017] C. Put the mixed raw materials into the feeding port of the injection molding machine, and after melting, quickly inject them into the mold cavity with the help of the thrust of the screw at high pressure; the screw speed of the injection molding ...

Embodiment 2

[0021] The preparation method of a luminous plastic injection molded part provided in this embodiment comprises the use of 97 parts by weight of plastic masterbatch, 2 parts of light-induced energy storage long-lasting luminous powder, 5 parts of nano-silica, and 1 part of diffusion oil or white oil composition, the preparation steps are as follows: its general steps are consistent with embodiment 1, and the screw rod of the injection molding machine is selected to have an aspect ratio of 18, and the screw speed of the injection molding machine is 40 rpm; and the feeding of the injection molding machine The temperature of the section is controlled at 250°C; the temperature of the delivery section is controlled at 260°C; the temperature of the injection section is controlled at 270°C; the temperature of the nozzle is controlled at 270°C; After two high-pressure injections, the first high pressure is 110 Mpa, the second high pressure is 90 Mpa, and the back pressure is 2 Mpa. Si...

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Abstract

The invention discloses a night-light plastic injection-molding part preparation method. The part comprises the raw materials of, by weight: 90-98 parts of plastic masterbatch, 2-10 parts of light-induced energy-storage long-effect night-light powder, and 1-5 parts of diffusion oil or white oil. The method is characterized in comprising the steps that: A, the plastic masterbatch is bake-dried for 2-4h under a temperature of 80-100 DEG C, and water content is controlled below 0.05%; B, the light-induced energy-storage long-effect night-light powder and nano-grade silica diffusion oil or white mineral oil with a certain formula are stirred into a paste; the paste is well mixed by stirring with plastic in a ceramic stirring mixing container; and C, the mixed raw material is placed into a feeding port of an injection molding machine; the raw material is molten, and is injected in to a mold cavity with high-pressure and high-speed under the thrust of a screw, such that injection molding is carried out. With the preparation method provided by the invention, the obtained night-light injection-molding part has the advantages of long luminescent time and high luminescence brightness. Also, the light-induced energy-storage night-light powder is adopted, such that luminescence is stable and environment-friendly, and no pollution is caused.

Description

technical field [0001] The invention relates to an injection molding method, in particular to a method for preparing a luminous plastic injection molded part. Background technique [0002] At present, the plastic materials used to prepare luminous plastic parts on the market mainly include PP, PE, PVC, PU, ​​ABS, TPR, EVA, PMMA, PC, GPPS, and nylon. The more transparent the plastic material, the better the luminous effect. However, when the luminous powder is mixed with these plastic materials and injected, due to the relatively high hardness of the luminous powder, friction will occur during the contact with the metal, and the oxide layer on the metal surface is black. After friction, it is mixed into the product for use. It turns black, and the higher the temperature, the worse this phenomenon is. Contents of the invention [0003] The object of the present invention is to provide a method for preparing luminous plastic injection molded parts with long luminous time and...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08K3/36B29C45/76
Inventor 李平波
Owner NINGBO DEMING LUMINOUS TECH
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