Hi:
> There have Cellulose Acetate Butyrate (CAB) sheet from Eastman
> Kodar, however the hardness of surface is not enough only about 2H, as
> well as scrap resistance is not enough. I like to UV coat on the surface
> but fail, because Eastman coated it before sell, I don't know what it
> is, therefore we can do nothing on this surface, I tried to use solvent
> to destory the surface but fail, because too slow is still can not
> production. Plasticizer no work too. Does any one can give me suggestion
> how to treat this surface in order to adhesion UV resin. Thanks > everybody.
Corona or flame treatment are some easy options that should work with
any film.
However, I am worried about how well this will work. If there is
already a coating, that coating does not seem to have good mechanical
properties itself, including adhesion. Any UV coating you add may not
stick well since it is sticking to the Eastman coating, not directly
to the CAB.
You could also try to crosslink the CAB with the coating by using
e-beam or maybe a chemical crosslinking reaction (peoxide maybe?)
John
leechyun wrote in message ...
Hi:
There have Cellulose Acetate Butyrate (CAB) sheet from Eastman
Kodar, however the hardness of surface is not enough only about 2H, as well
as scrap resistance is not enough. I like to UV coat on the surface but
fail, because Eastman coated it before sell, I don't know what it is,
therefore we can do nothing on this surface, I tried to use solvent to
destory the surface but fail, because too slow is still can not production.
Plasticizer no work too. Does any one can give me suggestion how to treat
this surface in order to adhesion UV resin. Thanks everybody.
Chyun Lee
Are you sure that it is coated? I'm not familiar with CAB sheet, but
I've worked with cellulose acetate- and it's often very heavily plasticised.
The resulting greasy surface might seem like a coating, and can give
problems when trying to apply coatings on top. Which solvent are you using
to 'destroy the surface'?
CAB itself should be quite friendly to stick to, as
CAB when used as a coating has good adhesion to a
number of surfaces.
--
Anton
Hi:
Thanks for your interesting in my problem, I have two kinds of sample,
one has been hard coat the other are not ( Eastman said), Eastman sell only
hard coat product on the market, you can never see non hard coat product on
the Eastman catalog, due to the business political, this product only sell
to the big customer, small company like us, sorry.
Two kinds of product have very different surface property, it is a big
different you can dip it in methylene chloride about 20 seconds, surface of
non hard coat, it looks like glue, because CAB solute and swell, it is very
easy to wet of UV resin, but hard coat sample, after 20 seconds it etching
the surface only, looks like "mountain hill", you can use nail to scrap, it
still hard. Therefore UV resin can not adhesive because leave in the surface
is inactive, as well as surface is not flat.
You can easily coating on CAB which surface is not hard coat, There is
no worth to discuss here. High shool boy can do it after I teached. It is
easy.
I can understand there are much plasticiser in the CAB however I tried
UV coated on soft PVC before, it still can adhesive and has elastic, as you
know there are much plasticiser in soft PVC, the principle is some component
of recipe can "eat"plasticiser, it is not a big problem.
I tried to find one solvent or plasticiser which can swell curing parts
of CAB quick, I used methylene chloride, MEK, acetone, ethyl acetate,
n-butyl acetate, DMF, cyclohexanone, THF, toluene, DOP, DBP, triphenyl
phosphate as plasticiser, most of solvent can solute CAB of course, but
still no work because surface is destory,leave inactive parts.
The more difficult the more interested, otherwise no need research,we
do nothing,this is what kind of world.
Chyun Lee