silicone membrane, silicone blanket,

silicone rubber, silicone sheet,silicone foils

Peter Lin,  cnc@cncGlass.com,

cnc@cncEVA.com

Whatsapp:  0086 15013829504,

WeChat:  WeCan365

www.cncglass.com  www.cnceva.com

Silicone rubber sheet for glass industry is a key component of our company dedicated to supporting the glass vacuum laminated furnace according to market demand.

Laminated glass vacuum furnace uses vacuum principle, make the glass heated under vacuum conditions, with the atmospheric pressure, let the glass in the vacuum bag pressed to exclude air and unable to make bubbles, vacuum bag is under heating and vacuum pumped conditions to make two or more pieces of glass and EVA hot together.

Vacuum bag is a core part of glass vacuum laminated furnace, it makes up of two pieces of silicone rubber sheet and silicone sealing edge, silicone rubber sheet is a key component of the entire laminated furnace, its quality directly affects the quality of glass products.

How-to DIY Portrait Laminated Glass(Fabricated Laminated Glass)

How-to DIY Portrait Laminated Glass(Fabricated Laminated Glass)

How-to DIY Portrait Laminated Glass(Fabricated Laminated Glass)
By Peter Lin

Step 1 What we are going to make?

Enhanced portrait glass

Step 2 Get the photos of yourself

If you want to print the photos of yourself, you need PP papers and the print machine. But you can also ask some printing company to make it for you. But remember that it’s better if the paper is PP or PVC.

Step 3 Pre-laminated the Portrait Glass

The combination is : Glass+EVA Film+Photo+EVA Film+Glass.
Remember that wait till the photo’s ink is dry.
And the EVA Film here is a hot melt adhesive film.
Cut the extra EVA Film and the photo outside the glasses smoothly.
Use high-temperature resistance tape to solid the pre-laminated glass.

Step 4 Put the pre-laminated glass inside silicone vacuum bag

Put the pre-laminated glass inside silicone vacuum bag
Seal the silicone vacuum bag.
Start vacuum pump, double check the vacuuming is working well, and the value of vacuum pump reaches the required value
.
Step 5 Heating in two temperature stages

Normally, the heating will be set in two stage:
Low temperature stage: 60 degrees C for 15 minutes
High temperature stage:120 degrees C for 40 minutes

Step 6 Stop heating and wait for the laminated glass to cool down

Don’t stop vacuuming until the laminated glass is cool to the room temperature, Or the bubbles will come out inside the laminated glass.
Then you can get your portrait enhanced glass of yourself out of the silicone bag.
Use the EVA thermal cutter(also named as Hot Knife, Heat Cutter, Foam Cutter, Fabric Cutter)to get fid of the remained EVA film of the laminated glass.
Tips
Prepare all the materials you need before take actions:
PP/PVB papers
Laminating Oven
Silicone vacuum bag
Cleaned Glasses
Ethylene-vinyl acetate EVA Interlayer Film
High-temperature resistance tapes
Hot Knife, Heat Cutter, Foam Cutter, Fabric Cutter, EVA Thermal Cutter
Peter Lin@CNCGLASS

All rights reserved by CNC GLASS INTERLAYER TECH:
Product 1]CNC EVA INERLAYER FOR ARCHITECTURAL LAMINATED GLASS
Product 2]CNC MART FILM FOR PRIVACY SWITCHABLE GLASS
Product 3]CNC PVB INTERLAYER FOR AUTOMOTIVE WINDSHIELD GLASS
Web: www.CNCglass.com
Mail: cnc@cncglass.com
CNCGLASSCOM

Bubbles of Ethylene Vinyl Acetate EVA Film Laminated Glass

Bubbles of Ethylene Vinyl Acetate EVA Film Laminated Glass

Bubbles of Ethylene Vinyl Acetate EVA Film Laminated Glass
By Peter Lin
Reason 1:
The plainness of the glass is not good. If you making tempered laminated glass, make sure the thickness of Ethylene Vinyl Acetate EVA film is thick enough.

Reason 2:
The Ethylene Vinyl Acetate EVA film is not melt completely when processing in the laminating vacuum oven, you need to increase the temperature or prolong the heating time to make sure Ethylene Vinyl Acetate EVA Film is melt completely.

Reason 3:
Stop vacuuming too early. Make sure you keep vacuuming always working in whole procedure of making laminated glass, and only stop the vacuuming after the temperature is lower than 45 degree C.

Reason 4:
The silicone bag is leaking, so the vacuuming pressure can not reach 0.095MPA. Please replace the new silicone vacuum bag.

Reason 5:
Moisture in the surface of glass, Ethylene Vinyl Acetate EVA Film, decorative interlayers is too much, please dry them before laminating.

Reason 6:
Part of laminated glass is suffering too high temperature, and lead to the Ethylene Vinyl Acetate EVA Film decompose to gas. Make sure the heating is well-distributed. And make sure the temperature detector is working well and get the correct temperature.

Reason 7:
When edging laminated glass, bubbles appear at the edges. Because edging makes heat, and too much heat causes the bubbles. Please use more water to cool laminated glass when edging, and edging slowly and softly if necessary.

Any other situation, please feel free to contact us.

ALL RIGHT RESERVED BY CNC INTERLAYER TECH :
(Product 1. )Ethylene-Vinyl Acetate Ethylene Vinyl Acetate Ethylene Vinyl Acetate EVAInterlayer Film for Safety Laminated Glass
(Product 2.) China Solar Ethylene Vinyl Acetate Ethylene Vinyl Acetate EVAFilm for Solar Panel Encapsulation
(Product 3.) China Smart Switchable Film for Privacy Glass, Smart Glass
(4)Web:www.Ethylene Vinyl Acetate EVAfilms.com / www.cncnext.com
(5)Contact Us: cnc@cncnext.com/ benext77@hotmail.com /benext77@gmail.com

Peter Lin at CNCGLASS.COM

All rights reserved by CNC GLASS INTERLAYER TECH:
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
Mail: cnc@cncglass.com
benext77@gmail.com

Analyze Bubbles of Laminated Glass with EVA Interlayer Film

0731Analyze Bubbles of Laminated Glass(Smart Glass)with EVA INTERLAYER FILM

bubbles of laminated glass with EVA FILM INTERLAYER_conew1

Analyze Bubbles 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 older 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 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 Vacuum machine 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 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 fabric, which will help vacuum, and the fabric 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 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 put 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.

Notes:Always remember you put the wire net 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 on 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 of 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.

Peter Lin at CNCGLASS.COM

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
Mail: cnc@cncglass.com cnc@cncnext.com
benext77@gmail.com/
benext77@hotmail.com