Resin Compatibility
Check resin wetting, tack and release over the specified contact period. Assess any transfer that could affect later bonding.
Actual Temperature Exposure
Distinguish coating, chilled storage, layup and curing. Qualify only the stages and temperatures that the liner will experience.
Removal Integrity
Evaluate backing tears, resin disturbance and surface condition at removal. Acceptance should reflect the requirements of the next process.
CCK and PCK Papers Compare coated paper candidates for resin-film handling and prepreg backing. Confirm resin compatibility, backing integrity and separation at the planned removal stage.
Glassine and SCK Papers Evaluate dense papers for constructions where their caliper and handling meet requirements. Suitability depends on the specific resin and process exposure.
PET Film Carriers Consider PET when the process requires a film backing. Specify thickness and dimensional limits, then validate resin contact and any thermal exposure.
Is a prepreg backing a mould release film? Not necessarily. A handling backing and a mould release material perform different roles. Qualification for one role does not establish suitability for the other.
Can a backing stay in place during cure? Only after grade-specific qualification for the complete cure cycle and resin contact. Suitability for storage or layup does not establish cure resistance.
How should refrigerated prepreg handling be assessed? Include the required storage, thawing and removal sequence. Check condensation control, backing integrity and release under the actual process conditions.
Identify the resin system, reinforcement or receiving substrate, contact time and temperature history. Include removal stage, roll format and acceptance criteria for the next process.
HENGMU will exhibit at Adhesives & Bonding Expo Europe 2026 in Stuttgart. Visit Hall 1, Booth 721 to discuss silicone release papers and PET release films for adhesive tapes, foam tapes and industrial converting.
Winter production problems require more than a change in release paper grade. Learn how to assess storage conditions, roll conditioning, static and release force before selecting a different liner.
The establishment of HENGMU’s Malaysian facility and its 2,200 mm PM3 silicone coating line marks a new stage in the company’s manufacturing development in 2026. The expansion adds a production location for release materials and creates further options for international supply planning.
