Delamination Analysis of Laminated Glass with Polyvinyl Butyral PVB Interlayer Film

Delamination Analysis of Laminated Glass with Polyvinyl Butyral PVB Interlayer Film
By www.helloglass.com

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【Product 1】CNC-Force EVA INERLAYER FOR

ARCHITECTURAL LAMINATED GLASS eva@evafilms.com
【Product 2】CNC-SmartSMART FILM FOR PRIVACY

SWITCHABLE GLASS smartfilm@smartestglass.com
【Product 3】CNC-Shield PVB INTERLAYER FOR

AUTOMOTIVE WINDSHIELD GLASS pvb@pvbfilm.net
Web: www.CNCglass.com www.CNCnext.com

www.HelloGlass.com
Mail: cnc@cncnext.com
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benext77@hotmail.com

Condition One: Delamination Appears in Lines.
Reason:
When combining the glass with the Polyvinyl Butyral PVB interlayer film, some folds occur , or some place of Polyvinyl Butyral PVB interlayer film is too thin due to the hard pulling of the Polyvinyl Butyral PVB interlayer film. Especially the place near the hole or edges, some Polyvinyl Butyral PVB interlayer film have been shrink, so the Polyvinyl Butyral PVB interlayer film is too thin or even gone between the too glasses.

Solution:
When combining the glass with Polyvinyl Butyral PVB interlayer film, pull the Polyvinyl Butyral PVB interlayer film gently, make sure no fold of Polyvinyl Butyral PVB interlayer film, and the Polyvinyl Butyral PVB interlayer film is 2mm wider than the glass. And also cut the Polyvinyl Butyral PVB interlayer film gently.

Condition Two: Delamination in Edges and Holes of Laminated Glass with Polyvinyl Butyral PVB Interlayer Film
Reason:
The plainness of the edges and holes of the tempered glass is not good.

Solution:
Adjust the plainness of the tempered glass, clip the edges of the pre-laminated glass before putted into the autoclave. But don’t use too big clips, in case the PVB Film’s shape changes.

Condition Three: Delamination on Edges and Holes After the Laminated Glass is Installed in the Building

Solution: Install the laminated glass gently. it’s better if use the wrench with scale to hole the laminated glass. Make sure the glass glue is suitable for the laminated glass, and it should be neutral glue.

Condition Four: Irregular Delamination of Laminated Glass with Polyvinyl Butyral PVB Interlayer Film
Reason1:
The Adhesion of Polyvinyl Butyral PVB interlayer film and glass is not strong. Solution1:
The washing glass water is not good quality, it’s better use the water whose electric conductivity is lower than 20us.

Solution2:
The Polyvinyl Butyral PVB interlayer film absorbed too much moisture, maybe more than 6%. If moisture of Polyvinyl Butyral PVB interlayer film is higher than 1%, the laminated glass may appear white haze.

Solution3:
The combination of pre-laminated glass and roller exhausting air stage maybe not operate correctly, which lead to Polyvinyl Butyral PVB interlayer film not reacted perfectly. The main parameters are temperature, pressure and time.

Solution4:
The glass surface is not clean and dry enough.

Reason2:
The Polyvinyl Butyral PVB interlayer film is too thin.
Solution:
Use thicker or more layer of Polyvinyl Butyral PVB interlayer film.

Reason3:
The plainness of the tempered glass is not good.
Solution: Choose better quality tempered glass.

Condition Five: Delamination of Laminated Glass with Polyvinyl Butyral PVB Interlayer Film When in Boling Water Test

Reason1:
Two much air contained inside the laminated glass with Polyvinyl Butyral PVB interlayer film.
Solution1:
Sealing the edges too early in the pre-pressure exhausting air stage, which lead to the air stocked inside the laminated glass. Although, it seams successful when the laminated glass come out from the autoclave, but when in the boiling test, the bubbles will appears.
Reason2:
The Polyvinyl Butyral PVB interlayer film has absorbed too much moisture before laminating.
Solution2:
Adjust the storage conditions, make sure the moisture of Polyvinyl Butyral PVB interlayer film is less than 0.55%.

Copyright:

All rights reserved by CNC-INTERLAYER TECH:
【1】CNC-Force® EVA INERLAYER FOR ARCHITECTURAL LAMINATED GLASS 【2】CNC-Smart® SMART FILM FOR PRIVACY SWITCHABLE GLASS
【3】CNC-Shield® PVB INTERLAYER FOR AUTOMOTIVE WINDSHIELD GLASS Mail: cnc@cncnext.com
Web: www.CNCnext.com
benext77@gmail.com/
benext77@hotmail.com

Delamination Analysis of laminated glass with Polyvinyl Butyral PVB Interlayer Film.pdf

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All rights reserved by CNC-INTERLAYER TECH:
【Product 1】CNC-Force® EVA INERLAYER FOR ARCHITECTURAL LAMINATED GLASS 【Product 2】CNC-Smart® SMART FILM FOR PRIVACY SWITCHABLE GLASS 【Product 3】CNC-Shield® PVB INTERLAYER FOR AUTOMOTIVE WINDSHIELD GLASS Web: www.CNCnext.com www.HelloGlass.com
Mail: cnc@cncnext.com
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benext77@hotmail.com

Which Type of EVA Ethylene Vinyl Acetate Resin For Glass Laminating EVA Film

Which Type of EVA Ethylene Vinyl Acetate Resin For Glass Laminating EVA Film By Peter Shin www.helloglass.com

1.
Importance to learn more about EVA resign:

Glass laminating EVA Film is made of EVA Ethylene Vinyl Acetate resin. If you want to learn more of EVA INTERLAYER FILM for laminated glass. It’s helpful to learn more of EVA raw materials.

There are many type of EVA resign. Some is liquid, some is solid. So which type of EVA resin is for extrusion sheet use as melt-adhesive in glass laminating or solar panel encapsulation ? Following table shows the right type of EVA resin for extrusion sheet use as
hot-melt-adhesive film.

2.
Right Type of EVA resin for hot-melt adhesive:
(Notes : the following information is just for reference, there is not guarantee that they are very correct. If you need correct data, please contact your EVA INTERLAYER FILM SUPPLIER.)

Properties Value
Vinyl Acetate Content 28 Wt.%
Melt Flow Rate 20 g/10min
Density 0.945 g/ cm3
Vicat Softening Point 44 °C
Melting Point 73 °C
Tensile Strength at Break 26 MPa
Elongation at Break 800 %
Hardness Shore A 45
Brittleness Temperature < -50 °C
Ring&Ball Softening Point > 150 °C

Any other questions please feel free to contact us.
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(Product 1. ) Ethylene Vinyl Acetate EVA Interlayer Film for Safety Laminated Glass
(Product 2.) China Solar Ethylene Vinyl Acetate EVA Film for Solar Panel Encapsulation
(Product 3.) China Smart Switchable Film for Privacy Glass, Smart Glass (4)Web: www.cncnext.com/ www.evafilms.com
(5)Contact Us: cnc@cncnext.com/ benext77@hotmail.com /benext77@gmail.com