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Ultrasonic plastic compatibility chart
The term plastic can be used for thermoplastic
or thermoset materials. Most thermoset material can not be ultrasonically
bonded as they burn when heated. Thermoplastics are normal
categorised as amorphous or crystalline
Amorphous material exhibits a random, spaghetti
like structure. They are good at transmitting the ultrasonic energy to the
part that needs to be bonded. Amorphous material include: ABS, Polycarbonate
and Acrylic.
Crystalline materials have an ordered pattern, and have a well defined melting
temperature. Crystalline materials include: Acetal, Nylon, Polyester,
Polyethylene and polypropylene.
The following grid can be used to assist with
plastics suitable for ultrasonic welding.
E=Excellent, G=Good, F=Fair, P=Poor, NO=Not
suitable for ultrasonic welding.
| THERMOPLASTIC |
SPOT WELDING |
STAKING |
INSERTING |
NEAR FIELD
WELDING |
FAR FIELD
WELDING |
| ABS |
E |
E |
E |
E |
G |
| ABS/polycarbonate |
G |
G |
G |
G |
F |
| ABS/PVC |
G |
G |
F |
G |
F |
| Acrylic |
G |
F |
G |
G |
F |
| Acrylic
multi-polymer-xt polymer |
G |
G |
G |
G |
F |
| Acrylic/PVC |
G |
G |
F |
G |
F |
| Acrylic-impact
modified |
F |
F |
P |
F |
P |
| AMORPHOUS
POLYMERS |
SPOT WELDING |
STAKING |
INSERTING |
NEAR FIELD
WELDING |
FAR FIELD
WELDING |
| Butadiene-styrene(bds) |
G |
G |
G |
G |
F |
| Cellulosics-ca,cab,cap |
P |
G |
E |
P |
NO |
| Modified
phenylene oxide |
E |
E |
E |
E |
G |
| Polyarylate |
F |
F |
G |
G |
F |
| Polycarbonate |
G |
F |
G |
G |
F |
| Polyetherimide |
G |
G |
E |
E |
G |
| Polystyrene,
g.p. |
F |
F |
G |
E |
E |
| Polystyrene,
impact modified |
F |
F |
G |
G |
P |
| PVC-rigid |
F |
G |
E |
P |
P |
| PVC-flexible |
P |
NO |
NO |
P |
NO |
| San-nas-asa |
F |
F |
G |
E |
E |
| Styrene-maleic-anhydride |
E |
E |
E |
E |
G |
| Sulfone
polymers |
F |
F |
G |
G |
F |
| CRYSTALLINE
POLYMERS |
|
|
|
|
|
| Acetal
copolymers |
F |
F |
G |
G |
F |
| Acetal
homopolymer |
F |
F |
G |
G |
F |
| Fluoropolymer |
NO |
NO |
NO |
P |
NO |
| Nylon |
F |
F |
G |
G |
F |
| PC-pet |
G |
G |
E |
E |
G |
| Polyester-pbt |
F |
F |
G |
G |
F |
| Polyester-pet |
F |
F |
G |
G |
F |
| Polyetheretherketone |
G |
G |
E |
E |
G |
| Polyethylene
(ldpe,hdpe) |
G |
F |
G |
P |
P |
| Polyethylene
(uhmw) |
NO |
NO |
NO |
NO |
NO |
| Polymethylpentene |
G |
F |
E |
F |
P |
| Polyphenylene
sulfide |
F |
P |
G |
G |
F |
| Polypropylene |
E |
E |
G |
F-P |
P |
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