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Classification and Classification of Plastic in Plastic Mold

Engaged in the plastic mold industry friends, in the usual injection molding process will be exposed to a variety of plastic, but you know the plastic mold plastic classification and classification of it? Today, Dongguan Plastic mold factory editor for everyone under the brief introduction.


(A) according to the performance and use of plastic classification


1, general plastic (six varieties)


(1) Features


Refers to the production of large, wide use, low prices of plastic.


         (2) Type:


            Polyethylene, polyvinyl chloride, polystyrene, polypropylene, phenolic plastic, aminoplast


2, engineering plastics


Refers to the engineering technology as a structural material of plastic.


3, functional plastic (special performance plastic)


Refers to a specific environment, with a certain aspect of the special performance of the plastic. Such as: in the plastic glass fiber and other filler as a reinforcing material to further improve the mechanical properties of plastics, electrical properties and other composite materials are commonly known as reinforced plastic.


(B) according to the plastic structure of synthetic resin and thermal properties of the classification


1, Thermoplastics


Features: This plastic in the non-heating, the resin molecules were linear or branched structure; after heating softened and melted into a viscous liquid can flow, can shape a certain shape, after cooling to maintain the shape has been formed. If the molded article is heated again, it can be melted and can be molded again into a shaped article, so that it can be repeated.


2, thermosetting plastics


Features: This plastic in the non-heating, the resin molecules were linear or branched structure; after heating softened and melted into a viscous liquid can flow, when heated to a certain time, the occurrence of cross-linking reaction, the formation of Body structure and curing molding; on the molded products and heating, can not melt.


   Type: phenolic plastic, aminoplast, epoxy plastic, unsaturated polyester plastic, melamine plastic and so on.


 


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