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Selection skills and improvement of plastic injection surface method

Views: 51 Author: Site Editor Publish Time: Origin: Site

To meet the different needs of plastic surface disposal, a variety of disposal techniques have been developed. Commonly used techniques are: solvent cleaning (degreasing), corona treatment, short-wave ultraviolet radiation treatment, sandpaper treatment, sandblasting treatment, plasma etching, chemical etching, heat treatment, etc. For different materials, it is often necessary to choose different disposal methods. Due to the low surface energy of most plastics, many treatment methods, such as decoration, printing, oil injection, etc., cannot be directly applied, and surface treatment needs to be carried out first. The adhesion of plastics to various materials is a key issue for surface disposal needs. Generally speaking, plastic bonding performance is related to material structure and composition.


1. Skills for surface disposal

As manufacturers have higher and higher requirements for manufacturing quality, cooperation techniques and materials for improving the working environment, improving working efficiency and processing reliability have been developed and recovered, and their market applications have been expanded.

2. Light-curing coatings are used in automotive plastic parts

Engineering plastics or polymer-based composite materials have been used in many automotive parts, which not only require coatings to improve their appearance properties, but also sometimes improve the performance of the material. The replacement of glass with plastic for automotive lampshade and reflector materials benefits from the processing technology of light-curing coatings.

3. Influence of components

For all kinds of compounds or copolymers, the material components will also affect the choice of surface treatment methods. For example, the surface energy of fluoropolymers and their copolymers is lower than that of polyolefins, and the typical range is 18-26 dynes. For resins with high fluorine content such as PTFE, the adhesion performance is improved by a factor of 10 after sodium naphthenate etching, but only by a factor of 3 after oxygen or argon plasma treatment. The trend of PE is just the opposite.

However, after plasma treatment or sodium naphthenate treatment of the copolymer of fluororesin and PE, the bonding function increases by 10 times. It can be seen that plasma treatment is more involved with PE, while sodium naphthenate treatment is more important with fluororesin. It can be seen from this that the co-polymerization of different materials can improve the processing performance of materials. For copolymers of different components, it is also necessary to select the corresponding treatment method according to the characteristics of the material.

4. Thermal molecular bonding processing skills

This product is mainly suitable for surface treatment that requires oil spraying, bonding, decoration, lamination, printing or materials that need to be bonded with tape. It is stated that other similar processes used today cannot achieve the effect that AtmaP can achieve.

5. After modification, the appearance function has been improved

Due to its high brittleness (especially high temperature brittleness), high crystallinity and low molecular polarity, PP has poor blendability and adhesion with other polymers (such as plastics, rubbers) and inorganic fillers, which limits its use in a little. use of categories. After solid-phase graft modification, coherent products have been developed, such as chlorinated modified PP (MCPP) resin. The isotactic PP is modified by the solid phase grafting method to obtain MPP, and the MCPP solid powdery resin can be obtained by chlorination of MPP. Modified PP (MPP) and MCPP are used as special PP general materials, which greatly expands the application field of PP. The chlorinated modified resin has strong adhesion, improved bonding performance, and is easy to blend or bond with other resins.


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