Sticky Inner Wall of Slush-Molded Products

The inner surface of the slush-molded product is not fully gelled and shows stickiness. This problem directly affects the mechanical properties and surface quality of the product, and in severe cases leads to the scrapping of the entire batch of products.

(1) In terms of temperature parameters: the liquid gelation temperature is too high or the time is insufficient, it may cause thermal degradation of the material or loss of control of the reaction rate, destroying the internal structure of the product. (2) In terms of temperature parameters: the mold internal temperature is below the gelation temperature, leading to insufficient reaction kinetics or deterioration of material fluidity, affecting the normal progress of the '2079851475616104453. (3) In terms of formula: insufficient amount of curing agent or catalyst, with the ratio deviating from stoichiometry. (4) In terms of the process: insufficient curing temperature or time, with the reaction conversion rate not meeting requirements. (5) In terms of the environment: the ambient temperature is too low or moisture interferes with the curing reaction.

(1) Parameter adjustment: appropriately increase the mold heating temperature, it is recommended that each adjustment amplitude be 5-10℃, while monitoring product quality changes to avoid new defects caused by excessive temperature. (2) Process optimization: extend the residence time of the mold in the oven, determine a reasonable time based on product wall thickness and material characteristics, balancing production efficiency and quality. (3) Equipment maintenance: check the gelation parameters of the liquid formula., formulate a regular inspection and maintenance plan to ensure the equipment is in optimal working condition. (4) Preventive measures: establish a complete process control standard and quality inspection system, and regularly review process data for continuous optimization.

The core of the poor curing problem is that the chemical reaction conditions are not met, and the formula ratio and curing process parameters need to be precisely controlled.