Plastic casing should be steamed to vent
Plastic casing products do not need to vent when cooking.
1, when the seal enema, intestinal will have certain filling allowance, supply increase intestinal ingredients heat expansion volume use.
2, the plastic casing heat bilges cold shrink coefficient is bigger, can effectively alleviate the failure stress of food inflation.
Nylon and plastic casing, breathable casing made of polyamide don't need to vent. The characteristics: the casing strength is extremely high, can not broken excessive filling of 5% to 10%.