Processes

Blow Molding

Blow molding is often considered over standard injection molding when a part designer requires a hollow shape.  Blow molding is accomplished by either extruding a hollow tube of molten plastic or injection molding at low pressure around a core rod forming a preform commonly referred to as a parison. The parison is then clamped between two mold halves and expanded into the desired shape by inflating it with compressed air. After cooling, a hollow part emerges.

There are two major categories: extrusion and injection blow molding. The part design detail typically suggests which is more applicable to the application. The injection process results in more exacting part dimensions.

Estane® TPU products are unique in their design and performance, not only in delivering desired high durability in finished parts, but in versatility in processing as well.

Performance Features

• Excellent melt strength / green strength
• Dimensional stability
• Good elasticity
• High tear strength
• Optimized crystallinity for quick cycles
• Product versatility for extrusion, injection, or stretch blow molding

Applications

• Boots and bellows
• Automotive parts
• Consumer goods
• Lawn and garden equipment
• Recreational sporting goods
• Industrial goods