How to distinguish the PA6 from the PA66

How to distinguish the PA6 from the PA66

The price competition among the PA66 could make many suppliers mix the PA6 into the PA66 and that makes the properties of the product worse.
The price competition among the PA66 could make many suppliers mix the PA6 into the PA66 and that makes the properties of the product worse.
It is defined as PA66 in thermal break, but if PA6 mixed in it (as most manufacturers did in the market, to lower the cost, and easier to produce), the mechanical performance/ life/ tensile under high temperature will be affected, hereby we have simple methods for you to figure out whether the PA6 was mixed in thermal break or not:
1.While testing under high temperature, when increased up to 240 ℃, if the thermal break's melting, the PA6 was mixed;
2.Test and compare the tensile strength under 90 ℃, it is very low if PA6 mixed;
3.Drag mark on side of thermal break (as shown in attachment), then PA6 was mixed, as PA6 is very easy to be extruded out and the drag fixture (as per attachment) has to be attached on mold to make strips normal.