Polyethylene terephthalate (PET) can be bonded using a number of adhesives including
UV cure and/or cyanoacrylate adhesives. Cleanliness and surface preparation are
key elements to a successful bond. Additionally, for bonding that must withstand
high pressure or stress, a surface treatment is a must. Suggested surface treatments
include:
- Mechanical roughening, i.e., fine sandpaper, micro abrasive blasting.
(Note: we find that mechanical roughening is a very inexpensive and effective
method of surface treatment. The grit size of the sandpaper should be chosen carefully.
For example, using a thin-wall tube (0.0005" or less) would require a fine grit
paper, whereas a thicker wall tube (0.002" or more) could use a larger grit. When
using mechanical roughening, the user wants to be sure not to over-roughen, which
can cause pinholes and lead to premature failure in the PET).
-
Plasma etching or corona-treating (plasma is recommended).
- Primers (consult your adhesive supplier)
- Combinations of the above, i.e., mechanical roughening and plasma etching
For your specific use/appllication, we suggest you contact an adhesive manufacturer
for a full range of available adhesives and input regarding the appropriate adhesive
for your use. Also, be sure to inquire about adhesives recommended for polyester
or PET.
Suggested adhesive manufacturers: