Foamedplastics(alsocalledexpandedorcellularplastics)aremadebyaddingairorgastoaplasticresintoformasponge-likematerial.Moderndevelopmentsinplasticfoammoldinghaveplacedthisamongthemajorprocessingtechniquesoftheindustry.Resinscommonlyusedintheproductionofplas (共 8972 字) [阅读本文] >>