Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material
7. plastic (material)
8. [plastic by property]
9. thermoplastic
10. vinyl
11. vinyl resin
12. vinyl polymers

Anotations

Scope note:

A tough, flexible, transparent, moistureproof polyvinyl acetal resin made from polyvinyl alcohol and butyraldehyde; used, among other things, as the interlayer in safety glass and other laminated products.