Water-soluble PVA film for tack reduction in rubber sheet processing
A water-soluble PVA film is used to reduce tack in rubber sheet processing, preventing self-adhesion and equipment sticking. This method offers a clean, scalable, and low-disruption alternative to traditional tack reduction methods.
Overview
The proposed solution involves the application of a water-soluble polyvinyl alcohol (PVA) film to rubber sheets during or after the calendaring process. This innovation addresses common issues in rubber sheet manufacturing such as self-adhesion and equipment sticking. The PVA film creates a uniform, removable barrier that prevents these issues without altering the rubber's formulation or properties. It is easily removed with a water rinse before molding or curing, providing a cleaner and more efficient alternative to powders or liners.
Technical specifications
- Material: Polyvinyl alcohol (PVA) film
- Application Method: Lamination or transfer onto rubber sheets
- Removal: Water rinse
- Compatibility: Suitable for EPDM rubber and other similar materials
- Benefits:
- Prevents self-adhesion and equipment sticking
- Maintains rubber properties without contamination
- Scalable with existing lamination or transfer equipment
- Clean and dust-free process
- Testing: Adhesion, removability, and impact on mechanical properties such as tensile strength, elongation, and hardness will be assessed.
Technology readiness level
Currently at Technology Readiness Level 3, this solution has demonstrated its feasibility in controlled settings. The PVA film method has been validated for thermoplastic prepregs and is in the process of being adapted for rubber sheets. Further validation involves testing on EPDM rubber, optimizing removal methods, and conducting pilot trials to ensure seamless integration into existing production lines.
About Purdue University
Purdue University is a comprehensive public land‑grant research institution in West Lafayette, Indiana, anchored by a large residential campus. Industry engages through co‑located core facilities, pilot‑scale testbeds, and an adjacent innovation district that brings together labs, corporate R&D space, and maker resources near faculty talent. A statewide Extension network and an established engineering co‑op program connect companies to field sites, workforce pipelines, and pragmatic pathways from concept to deployment across Indiana. Research is supported by competitive federal funding from NSF, DOE, USDA, NIH, and the Department of Defense, and commercialization is managed by a dedicated technology transfer office in partnership with the university’s affiliated research foundation.
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