The term "delamination" is used to refer to a condition
where a thin micaceous layer develops on the molded product and
then becomes separated. In severe cases, this will extend over the
entire molding and give the impression that its skin is peeling
away.
Layer peeling caused by fracture (right) as a result of PS
inclusion
Although peeling may be identified immediately after molding,
it is usually detected as a result of cracking of the product.
Cause 1
Inclusion of a plastic which has poor compatibility with ABS (i.e.,
PP or PS, etc.)
Countermeasure
Carry out cleaning.
- Inside the cylinder
- Inside the hopper
- Inside the air feed lines
- Inside the dryer
Cause 2
When the die and plastic temperatures are extremely low, the difference
in temperatures between the outer walls and the fluid layer results
in the development of a thin hard coating which then peels.
Countermeasure
Standardize the resin temperatures.
- Raise the temperature of the resin
- Raise the temperature of the die
UMG ABS, Ltd accepts no responsibility
for the quality or safety of any customer products which use our
materials or which have made use of any type of data provided by
this company. Customers are requested to independently determine
the suitability of our materials for their products. We also request
that sufficient attention also be paid to laws, regulations, and
industrial rights.
