What Is PVB Film?

Polyvinyl butyral (PVB) is a clear, colorless, amorphous thermoplastic produced by condensing polyvinyl alcohol with butyraldehyde. It combines flexibility, UV resistance, film-forming ability, and strong adhesion to glass and other surfaces. PVB can also be cross-linked for enhanced durability. The film form is created through chemical modification of hydroxyl groups in the polymer, reacting with phenolic, epoxy, melamine resins, or isocyanates.

Where PVB Film Is Used

Automotive — Laminated safety glass for windshields. PVB interlayers hold glass fragments together on impact, preventing injury

Construction — Safety glazing for buildings, skylights, and railings

Photovoltaic — Solar module encapsulation, improving long-term durability and weather resistance

How to Recycle PVB Film

Step 1 — Collection — Recover windshields from end-of-life vehicles or construction demolition. PVB film is sandwiched between two glass layers.

Step 2 — Glass separation — Crush or cut the windshield and screen to separate glass from the flexible PVB interlayer. Remove residual glass fragments and fines from the PVB film.

Step 3 — Size reduction — A PVB film shredder cuts the separated film into strips, easing downstream processing. A granulator then reduces strips to uniform particles for extrusion.

Step 4 — Pelletizing — Sized PVB particles are melted and extruded into pellets for new film, coating, or adhesive applications.

Wanrooe PVB Film Recycling Equipment

Double shaft shredder — Ideal first-stage machine for PVB film. The tearing action produces strips that feed consistently into the granulator without wrapping or bridging. Handles film with residual glass fragments without excessive blade damage.

Granulator — Secondary reduction to controlled particle size for extrusion. Screen size determines final dimensions.

Capacities range from small batch processing to industrial lines handling multiple tons per day. Contact us with your windshield source volume, glass contamination level, and target pellet specification for a tailored system design.

FAQ: PVB Film Recycling

How much glass contamination is acceptable in the feed?

Minimal glass is manageable — the shredder and granulator can tolerate small residual fragments. However, excessive glass accelerates blade wear and contaminates the final pellet. Pre-separation using screening or air classification improves equipment life and output purity.

What can recycled PVB pellets be used for?

Recycled PVB re-enters the laminated glass supply chain as interlayer film, or finds use in paints, coatings, adhesives, and ink binders. The market depends on purity and color consistency. Clear, uncontaminated PVB commands the highest value.

Is PVB film hazardous to shred?

PVB itself is non-hazardous, but automotive windshields may contain traces of adhesives, sealants, or dirt. Shredding should occur in a ventilated area with dust collection. Workers should wear standard PPE for plastic processing operations.