超临界气体(CO2 或者N2) 通过气嘴注入到料筒内熔融的塑胶熔体中；
超临界气体(CO2 或者N2) 溶解到塑胶熔体中并经过螺杆搅拌区的搅拌混合作用形成单相溶体
单相溶体通过喷嘴注入模具型腔，由于温度和压力的降低引发分子的不稳定性从而在产品中形成大量的气泡核；
产品内部气泡核逐步长大冷却形成微小的孔洞；产品表面由于冷却速度快气泡核没有足够时间长大从而形成致密的表层产品内部气泡核逐步长大冷却形成微小的孔洞；产品表面由于冷却速度快气泡核没有足够时间长大从而形成致密的表层
Product weight reduction with average 8-15%
Reduce shrinkage, improve sink mark and dimension stability
Increase melt flow ability; reduce cavity pressure, which leads to lower clamping force
Available for product with thicker wall thickness, more flexibility for product design
Shorten cycle time around 20-30%
Not suitable for transparent product
Influence to appearance of molded parts
A little influence to mechanical performance of molded product
