Advantages of EVA Interlayer Film Compared to PVB Interlayer Film
EVA Interlayer Film and PVB Interlayer Film are both used to make laminated glass. PVB Interlayer Films have been used to make laminated glass far before EVA Interlayer Films have been used to make laminated glass.
Laminated glass is popular used as safety glass to protect people and property.
PVB Introduction:
Polyvinyl butyral (or PVB) is a resin usually used for applications that require strong binding, optical clarity, adhesion to many surfaces, toughness and flexibility. It is made of polyvinyl alcohol by reaction with butyraldehyde. The major application is laminated safety glass for automobile windshields. (learn more go to wiki: http://en.wikipedia.org/wiki/Polyvinyl_butyral ) .
What's Wrong with PVB:
However, PVB Interlayer Film is very sensitive to moisture, which makes it difficult to store and process. It requires high standard of processing condition to care about humidity.
So EVA Interlayer Film is emerging and playing a more and more important part in laminated glass and decorative art glass world.
EVA Introduction:
Ethylene vinyl acetate (also known as EVA) is the copolymer of ethylene and vinyl acetate. The weight percent vinyl acetate usually varies from 10 to 40%, with the remainder being ethylene.
It is a polymer that approaches elastomeric materials in softness and flexibility, yet can be processed like other thermoplastics. The material has good clarity and gloss, barrier properties, low-temperature toughness, stress-crack resistance, hot-melt adhesive, water proof properties, and resistance to UV radiation. EVA has little or no odor and is competitive with rubber and vinyl products in many electrical applications. (learn more go to wiki:http://en.wikipedia.org/wiki/Ethylene-Vinyl_Acetate )
Architectural EVA(Ethylene-vinyl acetate) Interlayer Film can be used in Vertical Safety Glass, Sloped Safety Glass and Overhead Safety Glass. Architectural EVA Interlayer Film own high-performance safety function properties, reliable and long-time weather resistance. The Architectural EVA Interlayer Film can resist penetration. When the Laminated Glass is shattered, the glass shatters would not fly away and hurting people. The standard thickness of Architectural EVA Interlayer Film is 0.38mm and 0.76mm. Architectural EVA Interlayer Film past the safety standard of the safety laminated glass with PVB(Polyvinyl butyral) Interlayer Film.
EVA Interlayer Film has Great Properties
-Great Light Transmission, ≧92%
-Almost Totally UV Blocked, ≧99%
-Long Weather Resistance, ≧15 years
-Great Tensile Strength, ≧21 Mpa
-Good Adhesive Strength, ≧50/cm
-Qualified Impact Resistance
-Qualified Moisture Resistance
Advantage of Making Laminated Glass with EVA Film Compared with PVB Film
1.EVA Interlayer Film is Less Sensitive of Moisture. And EVA Interlayer Film can be processed in an common rood condition.
2.EVA Interlayer Film is better at mobility when melted and better for laminating with papers, PET, silk, wire net, fabric.
3. EVA Film is good at aging resistance, the useful life can be more than 15years.
4.EVA Film is stronger in adhesive with various materials, PMMA, PET,Metals, Plastic etc.
5.PVB glass laminating is mainly working in a big autoclave, it's not suitable for the company make small quantity creatively designed artistic laminated glass for special requirement of different customers. PVB glass laminating machine is a large investment which would be a barrier for the new company who are interested in laminating glass world.
Can EVA Replace PVB?
Prove 1: In China National Safety Laminated Glass Standard(2009 Eidtion), the Glass Lamination Ethylene-vinyl acetate EVA Interlayer Film is unrecognized as a safety interlayer film for safety laminated glass, only if the Glass Lamination Ethylene-vinyl acetate EVA Interlayer Film past the same test as PVB interlayer film.
Prove 2: And our Glass Lamination Ethylene-vinyl acetate EVA Interlayer Film can past the test which is required for laminated glass with PVB interlayer film, like High Temperature Resistance Test, Radiation Resistance Test, Humidity Resistance Test, Ball Impact Peeling Test, Shot-bag Impact Test etc.
All rights reserved by:
China (Ethylene-vinyl acetate)EVA Interlayer Film Manufacturer for Safety Laminated Glass, Smart Glass, Privacy Glass, LED Glass, PV Solar Encapsulationetc.
cnc@cncnext.com / www.cncnext.com
eva@evafilms.com / www.evafilms.com
Sponsored by:
China Ucolin Glass Lamination Solution Experts:
-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating
-Silicone Rubber Sheet Manufacturer for Solar EVA Photovoltaic Panel Encapsulation
(uc@ucolin.com / www.ucolin.com /umewe360@gmail.com/umewe360@hotmail.com)
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