Glass Laminating Materials

Advantages of EVA Interlayer Film Comparing to PVB Interlayer Film(1)

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Advantages of EVA Interlayer Film Comparing to PVB Interlayer Film(1)

By Peter Shin

EVA Interlayer Film and PVB Interlayer Film are both used to make laminated glass.

PVB Interlayer Films have been used to make laminated glass for about 40 years.

And EVA Interlayer Films have been used to make laminated glass for about 15 years.

Laminated glass is popular used as safety glass to protect people and property.

Polyvinyl butyral (or PVB) is a resin usually used for applications that require strong binding, optical clarity, adhesion to many surfaces, toughnessand flexibility. It is prepared from polyvinyl alcohol by reaction with butyraldehyde. The major application is laminated safety glass for automobilewindshields. (learn more go to wiki: http://en.wikipedia.org/wiki/Polyvinyl_butyral ) .

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.

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 otherthermoplastics. 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 )

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Products: Architectural Super-Transparent EVA Film

Products:Decorative White-Sandblasted EVA FILM

Products:EVA Film Customized for Smart Glass Switchable Glass etc.

Buy EVA Interlayer Film from China, Click www.cncglass.com /www.evafilms.com

Notes of Making Laminated Glass with EVA Interlayer Film(2)

Notes of Making Laminated Glass with EVA Interlayer Film(2)

by peter shin

Yesterday we talked about the

Notes of Making Laminated Glass with EVA Interlayer Film(1)

, and today we are going to continue the topic.

4.The mobility of different thickness of EVA Interlayer Films is different when being heated. The mobility of thicker EVA Interlayer Film is more than the thinner EVA Interlayer Film. So please adjust the time of high-temperature-period of different thickness EVA Interlayer Film. If the high-temperature-period is too long, the melted EVA Film Interlayer would leak from the laminated glass, which will cause bubbles in the edges of laminated glass.

5.The quality of laminated glass is partly decided by the plainness of the glasses. So please try to select the good plainness of flat glass. If you are laminating with tempered glass, please use the thicker EVA Film Interlayer. For the poor plainness glass, the laminated glass may be broken when vacuuming or cause bubbles of laminated glass.

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Notes of Making Laminated Glass with EVA Interlayer Film(1)

Notes of Making Laminated Glass with EVA Interlayer Film(1)

1.Glass is not a good conductor of heat, so please don’t laminate different thickness of glasses at the same silicon bag. It’s more easily for the thin laminated glass with EVA Interlayer Film to transfer heat, so the keeping hearing time at high temperature can be shorter. And if the laminated glass is thicker, the keeping heating time for the high temperature should be longer.

2.For the different thickness of the fabric or papers, the thickness of EVA interlayer film should be different. For the thin and small silk, the 0.25 thickness EVA interlayer film would be ok. For the thicker and big silk or fabric, the thickness of EVA Interlayer Film should be 0.38mm or more.

3.Normally, the EVA Interlayer Film is soften at 75 degree and start to react at about 100 degree. And the EVA Interlayer Film would be totally molten at about 115 degree. Generally speaking, when the detector gets the temperature of 120degree, the real temperature of EVA Interlayer Film gets 115 degree.

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