Product embrittlement/crumbing

Foam products rupture or shed crumbs when stressed. The decline in mechanical properties is usually only discovered during product service or testing stages, and is concealed. This defect significantly reduces the mechanical properties and service life of the product and may cause early failure of the product during service.

(1) Process factor: isocyanate index in the formulation too high causing excessive crosslinking and embrittlement; this factor affects the '2079851475616104453 and final quality of the product. (2) Material stability aspect: foam skeleton damaged by thermal degradation; molecular chain breakage causes irreversible decline in material performance. (3) Process factor: catalyst imbalance causing excessive trimerization reaction; this factor affects the '2079851475616104453 and final quality of the product.

(1) Design optimization: optimize the isocyanate index to a reasonable range (usually 100-110); combine process simulation analysis or mold trial verification to continuously iterate and improve the design plan. (2) Process control: control the maximum heat release temperature; establish an online monitoring mechanism, set parameter upper and lower limits and implement alarm management. (3) Implementation measures: reasonably match the catalyst system., 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.

The core cause of insufficient mechanical properties is inadequate material bonding or degradation; the sintering/curing process needs to be optimized and raw material quality controlled.