Poor dimensional stability

Foam products continuously change in size during long-term use. This problem causes product dimensions to exceed the tolerance range, affecting assembly accuracy and product function.

(1) Gas removal aspect: the "breathing effect" caused by exchange between gas in the cells and air; gas retention forms internal defects affecting product compactness. (2) Process factor: creep of the closed-cell structure; this factor affects the '2079851475616104453 and final quality of the product. (3) Crystallization behavior aspect: post-crystallization of the material; changes in crystallinity affect the mechanical properties and dimensional stability of the product.

(1) Implementation measures: increase foam crosslink density to enhance dimensional stability; formulate specific operation plans based on actual production conditions and verify implementation effects. (2) Implementation measures: use physical foaming agents to replace low-boiling-point gases; formulate specific operation plans based on actual production conditions and verify implementation effects. (3) Implementation measures: perform heat treatment on products to stabilize dimensions., formulate specific operation plans based on actual production conditions and verify implementation effects. (4) Preventive measures: establish a sound process control standard and quality inspection system, and regularly review process data for continuous optimization.

This problem requires comprehensive analysis from multiple dimensions of materials, processes, equipment, and operation, and should be solved by systematically optimizing process parameters and the quality control system.