When to Use bopp frame?

10, Jun. 2024

 

Screen printing technology

Recommended tensioning for BOPP SD stainless steel meshes is dependent upon the demands upon print quality. Certain BOPP SD and BOPP SD PLUS meshes can be tensioned to way above 35 N/cm. In these instances, the stability of the screen printing frames in use must always be verified. Generally speaking, for these specifications a tension value of 30-35 N/cm is sufficient for an acceptable end result.

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  • Due to their higher tensile yield point, stainless steel meshes can be tensioned to higher values.
  • Higher tensions enable a smaller off contact distance.
  • The smaller the off contact distance, the better the registration accuracy.

With careful degreasing, the surface of stainless steel meshes offers an exceptional bond for a wide range of films and emulsions; no napping is required.
 
SD stainless steel meshes offer minimal undercutting and can therefore be exposed without problems.

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BOPP and PET

I ordered them from my local plastics supplier. Not something they stock, but they got me 6 48" X 96" panels for a project I was working on and had it drop shipped. They rolled up into a 24" X 48" tube for shipping.
The trade name is Vivak, and they are easily sourced over the Internet, but, they are also much more expensive that way. The generic PET-G is exactly the same thing.
Be warned, it is a bear to handle in those sizes.
It can be cut on a F, or with a sharp utility knife. It can be drilled, countersunk, and screwed to the backs of frames.
One nifty feature is that it can be scored and folded making a hinge. Hugh handed out some samples and challenged the class to fold and unfold it until it experienced plastic fatigue. None did.
I haven't talked with Hugh since at WCAF, but I'm sure he has come up with other uses for that product.

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