News and Articles from the Dunstone Company About Hi-Shrink Tapes and Tubing.
Dunstone would like to congratulate industry partner Spirit AeroSystems-Wichita, KS on the delivery of the 500th Section 41 of the Boeing 787 Dreamliner. Video courtesy of Spirit AeroSystems, Inc.…
Use of 2” wide Hi-Shrink 210S tape allows the customer achieve a good surface finish without having to sand or gel coat the outer surface of the poles. The 210S tape is spiral wound on the part prior to the oven cure. The part is not rotated during the cure cycle, so the Hi-Shrink Tape helps prevent resin pooling on the bottom of the part.…
Dunstone Hi-Shrink FEP Tubing used in the bladder preparation process allows the customer to prepare more parts in less time in order to incorporate them into the larger fuselage section prior to autoclave cycle. Our FEP tubing shrinks quickly, and without wrinkles, requiring less heat to fully shrink when compared to other heat shrink release film tubes. Dunstone Hi-Shrink FEP Tubing has uniform thickness which give it uniform shrink percentage throughout.…
The OEM was able to use Dunstone’s F-Series Tape 210F as the first layer of release film instead of the film currently used. Hi-Shrink Tape 210F is a polyester based shrink film, with 10% shrink, which has a fused coating of Tedlar® on one side for release. The product provides the high temperature release characteristics of Tedlar®, combined with the high shrink force of polyester film at an overall lower cost.…
Replacing the cellophane with Dunstone 220R allowed the operators to continue wrapping the film in the same manner, with lower tension during tape wrapping. The shrink characteristics of the 220R enabled the tape to shrink and apply its max shrink force at the same time the resin viscosity is dropping, enabling the tape to minimize resin voids between the plys and reduce prepreg wrinkling.…
The customer was able to reduce the wrapping step down to one operation, as they were able to achieve sufficient part compaction using only one layer of our film vs two layers (cellophane & PVA) previously. Because the PTFE release coated tape removes cleanly from the part post-cure, the Dunstone Hi-Shrink Tape allowed the customer to completely eliminate the 24 hour long H20 soak for all parts, which increased throughput in that work cell. The bottom line savings realized by the customer amounted to $150,000/year.…