|
|
 |
|
 |
|
|
Generally,
plastics can be split into 2 categories, thermoplastic and thermosetting.
Under ambient temperature, thermoplastic is in granular type and
when heated to certain temperature, it will become molten and when
cool down, it will be solidified to a form. If heat again, it will
become molten again for next plastering. Hence, thermoplastics can
be molded through heating to molten and repeated solidification.
So there is so called secondary material. On the other hand, thermosetting
plastic is solidified when heated to a certain temperature, and
even heat up again, the status will not change again. So, thermosetting
plastics cannot be heated to repeat the molding. Therefore, thermosetting
waste material is normally unable to recycle. The categorization
is shown as the following figure. |
|
|
|
|
|
|
 |
|
|
Characteristics：
•Good electric characteristic, good weather resistance
and good machinability. Low Creep.
•Good heat resistance.
•Fast crystallization, good molding property and fluidity.
•Low water absorption, good dimensional stability.
•Good surface gloss and coloring property.
•Resisting organic solvent, oil and low acid.
•Heat resistance better than FR-PBT. |
Molding
conditions：
•Cider bottle
•Fiber
•Recording tape
•Magnetic tape
•Camera film
•Food container
•Cosmetic vial
•Medicine vial |
|
 |
|
|
Characteristics：
•High shrinkage, easy to bend and deform.
•Need cooling time, poor molding yield.
•Sink will occur to product, need forceful mold releasing.
•Molding shrinkage is highly affected by mold
temperature. Poor stability.
•Good fluidity, good heat stability, but molecular
orientation lead to distortion.
•Lighter than water, soft.
•Not heat resistance, adhesive printing. |
Molding
conditions：
•Electrical:Electro
•Machinery:Mud splasher
•Daily supplies:Container
•Others: Toys |
| |
 |
|
|
Characteristics：
•Poor heat stability, molding and decomposition
temperature range are similar.
•Poor fluidity, poor molding appearance.
•Corrosive to mold.
•Most easy to burn and generating acid gas.
•Good strength, electrical insulation and chemical
resistance.
•Can softened after adding DOP.
•Poor heat resistance. |
Molding
conditions：
•Electrical:Electric wire
•Machinery:Car mattress
•Construction:Water pipe
•Daily supply:Handbag
•Other:Blowing cylinder |
|
 |
|
|
Characteristics：
•Low fluidity, flow mark appears if filling were poor,
when pressure is not enough, easy to have dent,
need high-pressure molding.
•In optical use, transparency is a problem, when
mixing with other material; care shall be given to
decomposition.
•Excellent in molding property, mechanical strength
is better than PE.
•Good water, chemical resistance and electrical insulation.
•Easy to distort, deform and dent.
•Adhesive, the lightest plastic.
•Low Sp. Gravity (about 0.90), FDA grade, good,
transparency, not moisture absorption, low price,
heat resistance and normal mechanical strength are
poor, low foaming percentage, poor for printing. |
Molding
conditions：
•Auto parts
•Construction:Pipe
•Daily supplies:Bottle
•Electric:Electric insulation
material
•Others:Packing plastic
bag, Toys, Medical supply |
|
1 2 >> |
|
 |
|
Contact