1. Forming Principles

Blister molding is a secondary forming process. Plastic sheets are heated to a softened state, then adsorbed onto the mold surface by vacuum suction or positive pressure, and shaped after cooling.

Injection molding is a primary forming process. Molten plastic is injected into the cavity of closed molds at high pressure via an injection molding machine, and finished products are obtained after cooling and demolding.

2. Application Scenarios

Blister molding is suitable for thin-walled, large-area products such as PVC wall panel film layers and packaging pallets. It features low mold cost and quick model change, fitting the small-batch customization needs of 3D PVC wall panels and enabling rapid production of panels with 3D textures like stone and wood grain.

Injection molding is ideal for products with complex structures, uniform wall thickness and high strength, such as plastic parts and shells. It has high mold cost and is more suitable for mass standardized production.

3. Cost and Efficiency

Blister molding has short mold-making cycle and low investment, offering high cost-effectiveness for small-batch production, but its single-piece efficiency is lower than that of injection molding. Injection molding has long mold development cycle and high cost, while its single-piece cost is low and efficiency is outstanding in mass production.

In conclusion, neither process is superior. Blister molding is the preferred choice for customized 3D PVC wall panel production, while injection molding is a powerful tool for large-scale standard part manufacturing.