The difference between blow molding and injection molding processes, raw materials and applications
Release Time:
Apr 03,2026
Blow molding: Blow molding uses gas pressure to enclose the hot billet in the mold to become a hollow product, or to blow the tube billet into the tube film without a mold. Injection molding: Injection molding is to melt the plastic material, then inject it into the membrane cavity after molding.
A.Different processes
Blow molding: Blow molding uses gas pressure to enclose the hot billet in the mold to become a hollow product, or to blow the tube billet into the tube film without a mold.
Injection molding: Injection molding is to melt the plastic material, then inject it into the membrane cavity after molding.
Second, the raw materials are different
Blow molding: The raw materials for blow molding are usually polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polystyrene (PS), thermoplastic polyester (PBT, PET), polycarbonate (PC), polyamide (PA), cellulose acetate (CA), etc.
Injection molding: The raw materials for injection molding are usually thermoplastic or thermosetting materials.
3. Different applications
Blow molding: Widely used in bottles, cans, baby products, sporting goods and other industries.
Injection molding: Injection molding is widely used in mobile phones, notebook computers, various plastic housings, communications, micro-motors, computers, electrical appliances, electronics, toys, watches, lighting, locomotives and other industries.
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