why use the recycle raw material there has black marks on the preform, Injection Molding (Machine)

Kenplas Forum ==> Injection Molding (Machine) ==> why use the recycle raw material there has black marks on the preform

why use the recycle raw material there has black marks on the preform even after blowing we also can see the black marks on the bottle .
usuall　I will add 5% recycle raw material . we try to reduce the melt temperature but it is useless .
does there any good solution ?
thanks in advance

2006-12-7 15:19:28 By welch Chen


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