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Jiangyin JiHua New Material Co., Ltd.
Engineering plastics Polycabonate
Property :
¡ö High mechanical property ¡¢stiffness as well as toughness un-notched impact strength which is among the best of thermoplsctics and present ductile fracture submit .shaped products can reach the high precise allowance and keep the dimension stability in a wide range.
¡öDistortion temperature 135-145 ¡æ and can reach to 150-170 ¡æ with fiber grass reinforced.
¡öGood electrical property ¡¢ corona resistance and keep constant electrical insulation property in a wide range of temperature.
¡öBad fluidity ,it is difficult for pure resin to shape processing .in order to do easily ,you can modify with ABS or PBT to form PC/ABS or PC/PBT .
¡öBe highly sensitive to water ,so must be dry properly before using it and guarantee water less than 0.02% .
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Typical application:
¡öSocket & switch¡¢ clock¡¢ LCD¡¢ coffee stove¡¢food disintegrator¡¢ TV set parts ¡¢jacklight housing ¡¢alarm lamp¡¢ switch teriminal¡¢cable connector¡¢ freeway symbol board ¡¢precision mechanismgear parts ¡¢helmet ¡¢eye shield .
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Use method :
¡öNeed to dry before injection molding , dry at 120¡æ for 5 hours(it would be best at negative pressure ), guarantee water less 0.02%.hopper temperature 100-115 ¡æ and mold temperature 80-90 ¡æ .injection molding condition as follow (only to preference):
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Injection molding conditions as follow (only to preference):
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Item |
Unit |
PC/ABS |
PC/PBT |
PC |
|
| Cylinder temperature | Rear | ¡æ |
220-235 |
225-240 |
270-280 |
| Middle | ¡æ |
230-240 |
235-245 |
280-300 |
|
| Front | ¡æ |
235-245 |
240-250 |
285-300 |
|
| Nozzle temperature | ¡æ |
235-250 |
240-250 |
280-295 |
|
| Resin temperature | ¡æ |
235-250 |
240-250 |
280-295 |
|
| Mold temperature | ¡æ |
60-100 |
60-100 |
100-120 |
|
| Injection pressure | kg/cm2 |
600-1200 |
600-1200 |
700-900 |
|
| Packing pressure | kg/cm2 |
500-1000 |
500-1000 |
500-800 |
|
| Back pressure | kg/cm2 |
0-40 |
0-40 |
10-20 |
|
| Screw speed | rpm |
40-90 |
40-90 |
40-60 |
|
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Represented value of modified PC product according to ASTM as follow:
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¡¡ Property |
ASTM |
Units |
PC/ABS |
PC/PBT |
PC |
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4400 |
4306 |
4400 |
4306 |
4400G10 |
4306 |
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| Density | D792 |
G/cm3 |
1.12 |
1.16 |
1.24 |
1.25 |
1.25 |
1.22 |
| Tensile strength | D638 |
MPa |
50 |
58 |
47 |
45 |
70 |
65 |
| Tensile elongation | D638 |
% |
50 |
40 |
100 |
80 |
8 |
80 |
| Flexural modulus | D790 |
MPa |
2100 |
2200 |
2000 |
1900 |
3500 |
2200 |
| IZOD impact strength Notched | D256 |
J/m |
500 |
550 |
750 |
700 |
100 |
200 |
| Rockwell hardness | D785 |
R |
110 |
106 |
130 |
130 |
85 |
90 |
| H.D.T.(0.46MPa) | D648 |
¡æ |
100 |
90 |
85 |
83 |
140 |
130 |
| Combustibility | UL-94 |
___ |
HB |
V-0 |
HB |
V-0 |
HB |
V-0 |
¡¡ Characteristics |
High impact |
Inflaming retarding |
High- impact High- gloss |
Inflaming retarding |
¡¡ Reinforce |
Inflaming retarding |
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Packing & stockpile :
- 25 kg plastic valve bag ,storage in dry¡¢well ventilated and keep out of the sun.
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