RESISTIVITY VS. PROCESSING FOR AMORPHOUS & CRYSTALLINE MATERIAL'S



THE INTENT OF THIS ARTICLE IS TO SHOW THE RELATIONSHIP BETWEEN PROCESSING AND THE CONDUCTIVITY (RESISTIVITY) OF A COMPOUND. FIRST WE WILL TAKE PLASCO’S PCC 600 (POLYCARBONATE +30% CARBON FIBER) AND THEN PLASCO’S PNC 600 (NYLON 6/6 +30%
CARBON FIBER).

NOTE THAT EACH SET-UP VARIES ONE OF THE THREE PROCESSING VARIABLES. THE RESULTANT RESISTIVITY VALUE SHOWS THAT PROCESSING HAS A DRAMATIC AFFECT ON CONDUCTIVITY.

FOR PLASCO PCC 600
SET-UP	CYLINDER TEMP (F)	MOLD TEMP (F)	INJECTION SPEED	SURF.RESIS. ohm/sq	VOL.RESIS. ohm-cm
1	540	100	FAST	2000	3700
2	540	100	SLOW	3700	6700
3	600	100	FAST	4200	9800
4	600	100	SLOW	5000	16000
5	540	250	FAST	2100	3900
6	540	250	SLOW	2900	4700
7	600	250	FAST	6100	11000
8	600	250	SLOW	5300	17000
FOR PLASCO PNC 600
SET-UP	CYLINDER TEMP (F)	MOLD TEMP (F)	INJECTION SPEED	SURF.RESIS. ohm/sq	VOL.RESIS. ohm-cm
1	490	100	FAST	4000	6300
2	490	100	SLOW	3400	4400
3	550	100	FAST	4900	12000
4	550	100	SLOW	2700	5000
5	490	250	FAST	2100	3500
6	490	250	SLOW	1600	2800
7	550	250	FAST	2600	9300
8	550	250	SLOW	2100	5600

CONCLUSIONS:

FOR AMORPHOUS MATERIALS (PCC 600);
USE THE COOLEST CYLINDER PROFILE, THE LOWEST MOLD TEMPERATURE AND FASTEST INJECTION SPEEDS TO ACHIEVE THE HIGHEST CONDUCTIVITY (LOWEST RESISTIVITY) IN YOUR MOLDED PARTS.

FOR CRYSTALLINE MATERIALS (PNC 600); A COOL CYLINDER PROFILE, HIGH MOLD TEMPERATURE AND A SLOWER INJECTION SPEED WILL YIELD THE MOST CONDUCTIVE PARTS.

ANY QUESTIONS REGARDING THIS STUDY CAN BE DIRECTED TO PLASCO AT 831-464-1111.