We recently had a customer ask us several questions about our LINQTAPE PIT1S / PIT1A Polyimide tapes. We have posted the questions as long as the answers below:
Q1. What’s the minimum polyimide film thickness?
A1. Our thinnest standard material is 1mil (0.025mm). We can produce thinner, but there would be minimum order quantities associated.
Q2. Could we provide free samples of PIT1A?
A2. As you can imagine, CAPLINQ receives many, many requests for “free samples”. The manual entries, paperwork and ultimately costs that resulted from working outside our current workflow system (ensuring correct ship-to addresses, price quotes, samples lists, follow-up, etc.) was not in line with the low-cost model that we try to bring to our customers. As such, we have done away with minimum order quantities and implemented a way to order single units instead of shipping free samples.
Q3. What is the heat resistance? We require it above 200C for 1–2 hours.
A3. The temperature resistance depends on the application. The polyimide film itself can withstand temperatures of 450 °F (~230 °C) and for short periods, can withstand temperatures as high as 900 °F (~480 °C). The weak point is the adhesive system. The silicone adhesive (PIT1S-Series) can maintain adhesion above 200C, as well as short (2–3 minutes) periods at 260C. Above this temperature, adhesion drops off quickly. Acrylic-adhesives (PIT1A-Series) have a lower temperature resistance, but at lower temperatures (Room temperature) have a higher adhesion than silicones. Depending on the application (namely masking), it is quite reasonable that the PIT1S could withstand 200C for 2 hours.
Q4. Under a certain degree of temperature an pressure, would the glue be coming out from the edge?
A4. It is imaginable that under pressure at high temperature that the adhesive layer is compressed. Whether and how far it would come out from under the polyimide backing, we have no data for.
Q5. What is the lowest thickness that can be produced, and will the thickness influence its heat resistance ability?
A5. I need to check with production what the minimum thickness is, but no, heat resistance is independent of the film thickness.