Breakthrough in High-Barrier EVOH Composite Film Development
With the increasing demand for barrier performance in the food, pharmaceutical, and electronics industries, the development of EVOH (ethylene-vinyl alcohol copolymer)-based high-barrier composite films is experiencing a new wave of technological innovation. As a core material offering ultra-low oxygen permeability, flexible processing, and environmental potential, EVOH polymer is redefining performance standards in the packaging industry through advancements in composite film structure design, functional integration, and sustainability.
Synergy of Nanotechnology and Bio-Based EVOH
（1）Nano-Enhanced EVOH Composite Film
Traditional EVOH plastic's barrier performance tends to deteriorate in high-humidity environments (oxygen permeability increases 10-100 times at RH >80%). However, the introduction of nanotechnology has significantly improved its environmental adaptability.
LG Chem in South Korea has developed an EVOH/graphene nanosheet composite film. Leveraging graphene’s hydrophobic properties and layered barrier effect, this film maintains oxygen permeability below 1.5 cc/m²·day even in high-humidity conditions (RH 90%), achieving five times better moisture resistance than pure EVOH film.
Toray Industries in Japan modified EVOH resin with montmorillonite nanoparticles, forming a "brick-and-mortar" structure that improves oxygen barrier performance by 30% and enhances puncture resistance by 20%. This innovation has been successfully applied in vacuum packaging for fresh meat.
(2) Accelerated Commercialization of Bio-Based EVOH
In response to the EU's Carbon Border Adjustment Mechanism (CBAM) and rising ESG requirements from major brands, bio-based EVOH research has achieved significant milestones:
Mitsubishi Chemical has launched an EVOH pellets containing 40% plant-based ethylene alcohol, reducing its carbon footprint by 45% while maintaining full compatibility with petroleum-based EVOH. This innovation has gained certifications from companies like Danone and Nestlé.
DuPont and Cargill have jointly developed a bio-based EVOH/PLA composite film, achieving 100% bio-based content. Under composting conditions, this EVOH barrier film reaches a 90% degradation rate within 180 days, making it ideal for organic food packaging.
The breakthrough in high-barrier EVOH composite film development marks a shift in packaging materials from "passive protection" to "active enablement." As a core supplier of EVOH resin, we are committed to supporting customers through material innovation and process expertise, helping them overcome challenges in barrier performance, cost management, and sustainability. Our goal is to establish EVOH high barrier film as the technological cornerstone of the premium packaging market.
