Advantages of EVA Interlayer Film Compared to PVB Interlayer Film By Peter Lin

Advantages of EVA Interlayer Film Compared to PVB Interlayer Film By Peter Lin

What’s Wrong with PVB film:
However, PVB Interlayer Film is very sensitive to moisture, which makes it difficult to store and process. It requires high standard of processing condition room to care about humidity.
So EVA Interlayer Film is emerging and playing a more and more important roll in laminated glass and decorative art glass world.

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 room condition, no special requirements.
2- EVA Interlayer Film is better at flowing mobility when heating and melting in the oven and better for laminating with papers, PET, silk, wire net, fabric insertion.
3- EVA Interlayer Film is good at aging resistance, the aging-resistance can be more than 15 years. That’s why EVA film is chosen for solar panel encapsulation lamination.
4- EVA Interlayer Film is stronger in adhesive with various materials, PMMA, PET,Metals, Plastic etc.
5- EVA glass laminating line is easier and less cost to install. PVB glass laminating is mainly working in a big autoclave, it’s not suitable for the company to 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 Edition), the Glass Lamination Ethylene-vinyl acetate EVA Interlayer Film is recognized as a safety interlayer film for safety laminated glass, only if the Glass Lamination Ethylene-vinyl acetate EVA Interlayer Film past the same tests as PVB interlayer film.

Prove 2: Glass Lamination purposed Ethylene-vinyl acetate EVA Interlayer Film can past the tests which are 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.

Peter Lin
Mail: cnc@cncglass.com benext77@hotmail.com
Skype: Cnext365
2450mm Width EVA Interlayer Film Offered by CNC GLASS INTERLAYER
CNC Glass Interlayer
www.cncglass.com www.c-n-c.com
1-Super clear eva glass interlayer film, for both indoor and outdoor laminated glass application;
Super Clear EVA Film for Massive Lamination
EVAFORCE SUPER+
*Super Clear EVA Film for Massive Lamination
*Massive,Largest sold quantity in all EVA films
*Great performance with affordable price
*Aim for architectural safety laminated glass
*Applied both indoor and outdoor
*Replacing PVB Film

Super Clear EVA Film for Tempered Curved Glazing
EVAFORCE EXTREME
*Super Clear EVA Film for Tempered Curved Glazing
*Less overflowing during vacuuming heating
*Strengthened safety mechanical properties
*Recommended for extreme environments, safety tempered glazing or curved glass laminating
*Applied both Indoor and Outdoor
*Replacing PVB Film

Super Clear EVA Film for Graphic Insertions
EVAFORCE LOW80-120
*Super Clear EVA Film for Graphic Insertions
*Laminating both at 80°C and at 130°C
*Protect the insertions from above 100°C

2-White eva glass interlayer film, for both indoor and outdoor laminated glass application;
*Milky White/White Opaque EVA Film
0% Visible Light Transmittance
*Sandblasting White/White Translucent EVA Film
65% Visible Light Transmittance
*Super Milky White/Super White Opaque EVA Film
0% Visible Light Transmittance
*Arctic Snow White Translucent EVA Film
78% Visible Light Transmittance
*Cool Jade White/Cool Acid White Translucent EVA Film
81% Visible Light Transmittance
3-Thermal cutter for trimming laminated glass edges overflowed remains;
4-Green tape for fixing laminated glass, high temperature resistance;

PeterLin-CNC Glass Interlayer

Bubbles Solutions of Laminated Glass with EVA Interlayer Film By Peter Lin

Bubbles Solutions of Laminated Glass with EVA Interlayer Film By Peter Lin

Bubbles Solutions of Laminated Glass with EVA Interlayer Film By Peter Lin
++What People May Think, When They Face Bubbles
When some customers processing laminated glass with EVA INTERLAYER FILM, bubbles appear inside the laminated glass, People would always think in these ways:

1-The EVA INTERLAYER FILM I ordered last time, didn’t have bubbles problem, why this time the bubbles is coming out, that’s definitely the reason of the quality of EVA INTERLAYER FILM.

2-Some customers face this situation. Maybe they don’t use EVA INTERLAYER FILM very much, so they don’t finish the one roll of EVA INTERLAYER FILM in a short period. They used two thirds of the roll of EVA INTERLAYER FILM, and after several weeks, they go back to use the left part of the roll. But this time the bubbles are coming out, they are very confused. How come the same roll of EVA INTERLAYER FILM has different quality?

3-Some customer may just change the new EVA INTERLAYER FILM supplier and the bubbles comes out. Even their new supplier tell them it’s all about the processing , they would not believe him, they would think it’s of course the problem of the quality of your EVA INTERLAYER FILM, because the EVA INTERLAYER FILM of my old supplier don’t have this bubbles problem.

++General Reasons for Bubbles
Many Laminated glass producers have misconception of the reasons of the bubbles problems. Here is the real why:

1-First situation: the temperature is too high, maybe more than 160 C degree, which will cause the EVA and other compound to break down and create gas. In this way, it’s just reducing your temperature, and everything would be fine.

2-Second situation: the temperature in the oven is not average, which means some part of the glass, is hotter than others. So some part of the EVA INTERLAYER FILM will melt and finish the cross-link reaction while other parts of EVA INTERLAYER FILM is still not melted, which will interrupt the vacuuming and cause the bubbles. For this situation, we suggest you modified the lamination machine.

3-Third situation: The oil of the vacuum pump needs to be renewed. The vacuum pump is old or the vacuum ability is not good enough. If the vacuum machine is old, renew it. If the vacuum ability is not powerful enough, try to buy a new one.

4-Four situation: the air moisture is high. The moisture in the air in your region is changed, which will easily cause the EVA INTERLAYER FILM wet when it exposes in the air. Moisture in the EVA INTERLAYER FILM would cause the bubbles. Although the EVA INTERLAYER FILM is less sensitive to moisture compared to PVB FILM. But if the moisture of EVA INTERLAYER FILM is too high, the bubbles will also come out.

Some customer open the packaged of one roll of EVA INTERLAYER FILM, and don’t use it up at one time. And the left part of the EVA INTERLAYER FILM will absorb the moisture in the air and cause the bubbles.

5-Five Situation: Different EVA INTERLAYER FILM supplier has different formula for EVA INTERLAYER FILM, so if you change the EVA INTERLAYER FILM supplier, you need to adjusting the processing parameters of time and temperature setting according to the supplier’s EVA INTERLAYER FILM property.

++Micro Reasons for Bubbles:
1-The plainness of the tempered glass is bad.

–As you known, tempered glass is less plain than the flat glass. So you should choose a company that produce better tempered glass.

— Since the tempered glass’s plainness is worse than flat glass, you should use thicker EVA INTERLAYER FILM for the tempered glass. Generally speaking, the tempered glass should be laminated with at least 0.76 mm thickness EVA INTERLAYER FILM.

–Laminate less layers ‘pre- laminated glass’ in a silicone bag at a time. If you laminate too many layers ‘pre-laminated glass’ in a silicone bag at one time, the vacuuming would not work perfect and cause the bubbles.

–If you laminated small pieces ‘pre-laminated glasses’ at the same time, put the ‘pre –laminated glasses’ on the Teflon mesh , which will help vacuum, and the Teflon mesh should cover the vacuum hole to make sure the vacuum hole is not sealed by the silicone bag itself.

2-Check if the silicon bag is leaking.

–Averagely speaking, a silicone bag can be used for 2 or mare years. But check the silicone bag if your laminated glasses have bubbles.

–Check if the sealing buckle of the edge of the silicon bag is sealed perfectly when processing laminated glass with EVA INTERLAYER FILM.

3-It’s too early to pull the laminating glass out of the oven,
The temperature of laminated glass is still very high and the EVA INTERLAYER FILM is still melting and reacting. When the laminated glass is getting cold, the melted EVA INTERLAYER FILM is contracting, and the EVA INTERLAYER FILM can’t fully fill the gap between two glasses, so bubbles come out in edges.

4-It’s too early to stop the vacuuming.

And the cross link reaction of the EVA INTERLAYER FILM is not totally finished and stable. And also the silicone bag would suck same air back in to the bag, which cause the bubbles. So generally speaking, don’t stop vacuuming until the temperature of the laminated glass is lower than 45 degrees or close to your room temperature.

Notes:Always remember you put the Teflon mesh on the vacuuming hole to make sure the vacuuming is not stopped by the laminated glass upon the hole.

++Case Study: Bubbles of Laminated Glass with EVA INTERLAYER FILM

We have seen a situation in this way: Bubbles comes out in the Laminated Glass. And we checks all the details of vacuuming and vacuuming is definitely no problem.
But the bubbles still comes out in the laminated glass. And the bubbles are regular and in lines.
Finally we realized that the bubble lines are right upon the heating pipes.

So we reduced the temperatures and did the test. Then no bubbles comes out, but some part of laminated glass is not very transparent.

So we know the reason:
Because the heating pipes are under silicon bag, when laminating glass, the part of laminated glass right upon the heating pipes are in higher temperature. And the temperature inside the oven is not in average.
Remember that when the temperature is too high, the copolymer and compound will be breaking up and produce gas which would cause bubbles inside laminated glass.
So It’s better if you can talk to the EVA Glass Lamination Oven producer to modify the oven.

If you need any other information, please feel free to contact us.

CNC Glass Interlayer
www.cncglass.com www.c-n-c.com
Mail: cnc@cncglass.com benext77@hotmail.com
Skype: Cnext365
Phone: 0086 15013829504

1-Super clear eva glass interlayer film, for both indoor and outdoor laminated glass application;
Super Clear EVA Film for Massive Lamination
EVAFORCE SUPER+
*Super Clear EVA Film for Massive Lamination
*Massive,Largest sold quantity in all EVA films
*Great performance with affordable price
*Aim for architectural safety laminated glass
*Applied both indoor and outdoor
*Replacing PVB Film

Super Clear EVA Film for Tempered Curved Glazing
EVAFORCE EXTREME
*Super Clear EVA Film for Tempered Curved Glazing
*Less overflowing during vacuuming heating
*Strengthened safety mechanical properties
*Recommended for extreme environments, safety tempered glazing or curved glass laminating
*Applied both Indoor and Outdoor
*Replacing PVB Film

Super Clear EVA Film for Graphic Insertions
EVAFORCE LOW80-120
*Super Clear EVA Film for Graphic Insertions
*Laminating both at 80°C and at 130°C
*Protect the insertions from above 100°C

2-White eva glass interlayer film, for both indoor and outdoor laminated glass application;
*Milky White/White Opaque EVA Film
0% Visible Light Transmittance
*Sandblasting White/White Translucent EVA Film
65% Visible Light Transmittance
*Super Milky White/Super White Opaque EVA Film
0% Visible Light Transmittance
3-Thermal cutter for trimming laminated glass edges overflowed remains;
4-Green tape for fixing laminated glass, high temperature resistance;

Case Study: Bubbles Around EVA Interlayer Film Laminated Glass Edges by Peter Lin

Case Study Bubbles Around EVA Interlayer Film Laminated Glass Edges by Peter Lin (1)

Case Study Bubbles Around EVA Interlayer Film Laminated Glass Edges by Peter Lin (2)
Case Study: Bubbles Around EVA Interlayer Film Laminated Glass Edges by Peter Lin
Dear Peter
Can you tell me how to solve bubbles on the laminated glass edges ?
We are following same instruction(Time and temperature of processing EVA INTERLAYER FILM)what you give but still there are bubbles , glass 6mm + 6mm No tempering.
We are using your Super clear EVA interlayer film(EVAFORCE SUPER+)
Following photos will make you understand better:

Dear Glazier F
Based on your photos, it shows the EVA film in the edges is not enough to fully fill in the gap between the two glass.
The EVA film shrank and leaked.
So to avoid shrinking, the solution is that when you prepare the pre-lamiated glass, please don’t pull the EVA film with too strength( Don’t stretch the eva film glass interlayer), or the eva film will shrink after the cut.
And the eva film can be 2mm wider than the glass, to make sure the EVA film is enough to fill in the glass gaps.
To avoid leaking, you can try to reduce some temperature based on your situation.
Best Regard
Peter Lin

Dear Peter
As you said we didn’t stretch the Eva interlayer film and reduced the laminating temperature to 115 C degrees and the EVA laminated glass worked OK now , the bubble problem of the laminated glass edges was solved. Thanks.
There is printing on the glass , so it looks not super transparent.

Dear Glazier F
So good the bubble problem is solved.
Peter Lin
CNC Glass Interlayer
www.cncglass.com www.c-n-c.com
Mail: cnc@cncglass.com benext77@hotmail.com
Skype: Cnext365
Phone: 0086 15013829504
1-Super clear eva glass interlayer film, for both indoor and outdoor laminated glass application;
Super Clear EVA Film for Massive Lamination
EVAFORCE SUPER+
*Super Clear EVA Film for Massive Lamination
*Massive,Largest sold quantity in all EVA films
*Great performance with affordable price
*Aim for architectural safety laminated glass
*Applied both indoor and outdoor
*Replacing PVB Film

Super Clear EVA Film for Tempered Curved Glazing
EVAFORCE EXTREME
*Super Clear EVA Film for Tempered Curved Glazing
*Less overflowing during vacuuming heating
*Strengthened safety mechanical properties
*Recommended for extreme environments, safety tempered glazing or curved glass laminating
*Applied both Indoor and Outdoor
*Replacing PVB Film

Super Clear EVA Film for Graphic Insertions
EVAFORCE LOW80-120
*Super Clear EVA Film for Graphic Insertions
*Laminating both at 80°C and at 130°C
*Protect the insertions from above 100°C

2-White eva glass interlayer film, for both indoor and outdoor laminated glass application;
*Milky White/White Opaque EVA Film
0% Visible Light Transmittance
*Sandblasting White/White Translucent EVA Film
65% Visible Light Transmittance
*Super Milky White/Super White Opaque EVA Film
0% Visible Light Transmittance
3-Thermal cutter for trimming laminated glass edges overflowed remains;
4-Green tape for fixing laminated glass, high temperature resistance;