PC/ABS or PC internal stress cracking test method
PC/ABS or PC internal stress cracking test method qybee P PC/ABS or PC internal stress cracking test method for PC, PC plus fiber, PC/ABS application has a very wide range of areas, such as LED size frame, mobile surgery, computer case, its electric meter shell, the product may have a screw or glue, it can induce the PC and PC alloy material internal stress cracking, the defective rate is very high.
We stress cracking problems of PC on a simple elaboration from the following points.
PC internal stress cracking test: soaking with glacial acetic acid or carbon tetrachloride solvent at room temperature without annealing treatment with screw parts of injection molding products, from the time that is put in the crack of solvents to remember to stress cracking time.
Internal stress cracking test methods, for example: acetic acid soaking method: will do with screw groove or column PC products completely soaked in OC glacial acetic acid in the 30 s, withdraw after dry surface check, check the appearance, such as the density of tiny crack, show the existence of internal stress, crack, the more the greater the internal stress.
Because of all kinds of products have different specifications, size, concrete request to soak time length, glacial acetic acid concentration has a tiny crack can be unacceptable (
The product is not qualified)
Or depends on customer requirements for specific products.
Here not to generalize the stress cracking of specific standards in this paper.
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