(polyvinyl alcohol pvoh)
Polyvinyl alcohol (PVOH) is a water-soluble synthetic polymer renowned for its adhesive, emulsifying, and film-forming properties. With a global market projected to reach $1.45 billion by 2028 (CAGR 5.2%), PVOH serves critical roles in packaging, textiles, and pharmaceuticals. Its biodegradability aligns with sustainability mandates, driving adoption in eco-conscious industries.
PVOH outperforms conventional polymers with oxygen barrier rates up to 0.01 cm³/m²/day, far exceeding polyethylene's 150 cm³/m²/day. Key attributes include:
While both derive from vinyl acetate monomers, PVOH undergoes alkaline hydrolysis to achieve 98-99% alcoholysis. This creates hydroxyl groups instead of acetate in polyvinyl acetate (PVAc), resulting in:
Property | PVOH | PVAc |
---|---|---|
Water Solubility | High | None |
Adhesion Strength | 45 N/cm² | 28 N/cm² |
Biodegradation Period | 30-90 days | 5+ years |
The Asia-Pacific region dominates PVOH production (62% share), with Chinese manufacturers increasing capacity by 18% annually. Sustainability regulations propel demand, particularly in:
Company | Capacity (kT/yr) | Specialization | Certifications |
---|---|---|---|
Kuraray | 150 | High-purity grades | FDA, REACH |
Mitsubishi Chemical | 120 | Textile sizing | ISO 9001 |
Sinopec | 200 | Industrial adhesives | Halal, Kosher |
Advanced manufacturers now offer:
Custom molecular weights (13,000-130,000 g/mol) enable precise viscosity control from 4 cP to 65,000 cP.
A recent implementation in food packaging reduced oxygen ingress by 89% compared to traditional films. In textile production, PVOH sizing agents decreased warp breakage rates from 12% to 1.8%, saving mills $220/ton in yarn costs. Pharmaceutical companies report 40% faster dissolution times using PVOH-coated tablets versus gelatin capsules.
(polyvinyl alcohol pvoh)
A: Polyvinyl alcohol (PVOH) is a water-soluble synthetic polymer. It is widely used in adhesives, coatings, textiles, and biodegradable packaging due to its film-forming and emulsifying properties.
A: Polyvinyl alcohol (PVOH) is derived from the hydrolysis of polyvinyl acetate (PVAc). While PVAc is a thermoplastic adhesive, PVOH is water-soluble and used in applications requiring biodegradability or solubility.
A: PVOH is produced by hydrolyzing polyvinyl acetate (PVAc) under alkaline or acidic conditions. Manufacturers adjust hydrolysis levels to control solubility and mechanical properties for specific applications.
A: Top PVOH manufacturers include Kuraray Co., Ltd., Sekisui Chemical Co., Ltd., and Mitsubishi Chemical Corporation. These companies produce PVOH for industries like textiles, construction, and pharmaceuticals.
A: PVOH is biodegradable under specific conditions, making it popular for eco-friendly films and packaging. However, its environmental impact depends on disposal methods and additive content.