injection molding – blending of EVA + PP
Hello from a newbie! I do not have any plastics expertise so please forgive me.
I have developed a product but it is having manufacturing problems and I haven’t been able to find a solution.
My product requires an EVA masterbatch to be blended with flame retardant PP for injection molding. (This is an electrical product and I am not the manufacturer.:))
I know that EVA is polar and PP is non-polar but, the masterbatch I’m trying to use is marketed as compatible with almost all polymers, including a “good” rating with PP.
The EVA only needs to be 5% of the total construction with FR-PP being 95%. However, when the molds come out, almost all of them have surface cracks which makes them un-usable.
If anybody has any advice on how to blend EVA with FR-PP I would really appreciate it!
I’ve read about using PPMA & EVAOH compatibilizers but I really doubt my manufacture would consider using another additive.
Is this my only option or would there be any other solutions?
Thanks so much!
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