Dongguan blow molding product design safety test

Common materials for injection blow molding

PE, PET, PVC, PP, PC and POM are mainly used for containers and structural parts with higher molding accuracy and smaller volume;

Materials commonly used in injection stretch blow molding products

PETP, PVC, PP, PAN, especially PETP are more commonly used, and PC, PS, PA can also be used for this process.

Blow-molded products are widely used in various industries, especially in the beverage and pharmaceutical packaging industries. They are also widely used in the toy industry, such as: blown baby bottles, hollow floating parts, Christmas lampshades, toy yachts, and children's driving accessories. And some large toys, such as slide tracks, bases, etc.

With different product requirements, the focus of product design is also different. For toy products, blow molding products are more focused on safety and physical testing (tension, twist, throw, and stress cracking considerations), and for container products, it is more important. Pay attention to the requirements of pressure resistance, corrosion resistance and good barrier properties.

1) R transitions at the corners

Generally, R transitions are required at the corners and edges of blow molded products, because the inflation ratio at the sharp corners is relatively large, which may cause uneven wall thickness. In addition, the acute corners are also prone to pressure cracking. The R transition of the product may be Make the product wall thickness uniform.

2) Increased structural design in compression, tension and torsion

With different product requirements, some structural designs in compression, tension and twist can also be added:

A. If you want to increase the longitudinal resistance of the product, you can design some reinforcement ribs along the direction of the force;

B. If you want to improve the anti-sagging performance of the product, you can also design the surface into a curved structure that is conducive to stress and supplemented with ribs. The shoulders of bottle products should be inclined and not too straight;

Generally, the bottom of the bottle is made into a concave shape to increase strength and placement stability. For example, the bottles of edible oil that we usually see often have some uneven shapes on the surface. In addition to increasing the strength of the bottle, it is also conducive to labeling.