Bubbles Because Of Bad Vacuuming, EVA Laminated Glass Safety Glazing Case Study and Solutions By Peter Lin

Bubbles Because Of Bad Vacuuming, EVA Laminated Glass Safety Glazing Case Study and Solutions By Peter Lin

Summary:
The bubbles of laminated glass with EVA interlayer film happened because of bad vacuuming, and the bad vacuuming was because the vacuum pump was completely choked.
The solutions is to clean the vacuum pump and renew it.

Dear Peter
We really suffer with the wastes in laminating glass with EVA interlayer film. Every week we recycle a big volume of laminating glass because of the bubble problem.
Most of them are Tempered glasses. However we can’t understand why some of laminated glass come up with good lamination in the end of the laminating cycle but some of them wrinkled and bubbles between two glasses. We use 0.76EVA+0.38EVA for tempered glass and never single 0.38EVA interlayer film.
We don’t understand the reason of this problem. In attachment I send you the images of the bubbled laminated glass we got last 2-3 cycle.
The heating process is like below :
30 minutes till 60 C
15 minutes stay in 60 C
45 minutes till 133 C
70 minutes stay in 133 C
Then cooling and keep vacuuming till 30 C
Can you suggest us where the problem could be.
Best Regards
Glazing E

Following are the photos of the failed laminated glass with bubbles:
Bubbles Because Of Bad Vacuuming, EVA Laminated Glass Safety Glazing Case Study and Solutions By Peter Lin (1)

Bubbles Because Of Bad Vacuuming, EVA Laminated Glass Safety Glazing Case Study and Solutions By Peter Lin (2)

Bubbles Because Of Bad Vacuuming, EVA Laminated Glass Safety Glazing Case Study and Solutions By Peter Lin (3)

Dear Glazier E
Our first analysis is: The vacuuming system is not strong enough. According the photos of laminated glass you sent to us, the bubbles area was big and gathered in one place, and close to edges, because the vacuuming is not strong enough to vacuuming them out. Please check your vacuuming value and the vacuum pump to see if it’s working well.

And we need to ask you some more questions to analyze the situation:
It’s the bubbles close to the position of the heating pipe of the oven?
Is the heating of the oven not well-distributed?
How many combinations of pre-laminated glass was put in each silicone vacuum bag?

Dear Peter
Here is the answer:
The vacuum indicates the minimum on the scale.
There are wrinkles mostly and they are close to the edges. You are right .
We will check the rotation of the air pumps.
We put mostly the two couple of laminated glasses on top each other. I mean in one floor two levels (6+0.76+6) to the top (6+0.76 + 6).

Soon anther email came from the Glazier E.
Dear Peter
Thank you very much for your kind assistance. We really appreciate it highly and we are really happy of cooperation with you.
We checked the vacuum pump and the Filter was completely choked. Today we cleaned it and will load some glasses in order to control the process. Now the problem is well solved.
Thank you for your professional help.

Dear Glazier E
You are welcome.

Peter Lin
Mail: cnc@cncglass.com benext77@hotmail.com
Skype: Cnext365

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;

How to Get Free EVA Interlayer Film Samples from CNC Glass Interlayer

How to Get Free EVA Interlayer Film Samples from CNC Glass Interlayer

Hello Peter,
Could I get from your offer for EVA film for laminated glass and samples of these film, most care about matt film: Cool Jade White, Arctic Snow White, Super Milky White and Sandblasting White EVA interlayer film.
There is a possibility of getting from you all the milk samples of film???

How to Get Free EVA Interlayer Film Samples from CNC Glass Interlayer  (1)
Dear Glazier P
Yes we can. All the EVA interlayer film will be offered for free.
In order to make sure our EVA interlayer film free samples are taken seriously, we may ask you to take responsibility for the delivery cost of the EVA sample cargo. If you have the DHL/FEDEX/UPS/TNT collected account, you can arrange the express logistic agent to collect the EVA interlayer film samples.
If you don’t have the collected account of the DHL/FEDEX/UPS/TNT, you can pay the DHL cost to us, we will send the EVA Film samples prepaid by DHL.
Can you accept this solution?

Dear Peter
Yes, we are OK to pay for the delivery cost of the EVA interlayer film samples.
Please just send us a proforma invoice with the DHL cost, and we will make payment once we have it.

Dear Glazier P
Thanks very much, the DHL cost of delivery of the EVA interlayer film samples is received, we will send the EVA interlayer film samples to you very soon. We will send the following EVA film samples to you:
Super clear EVA film, EVAFORCE SUPER+
Super clear EVA film, EVAFORCE EXTREME
Milky white opaque EVA interlayer film
Super milky white opaque EVA interlayer film
Sandblasting white translucent EVA interlayer film
Arctic snow white EVA interlayer film
Cool jade white EVA interlayer film
And some types of the color EVA interlayer film
At the same time, we will send you 2 rolls of PET GREEN TAPE for safety glazing

Dear Glazier P
All the EVA interlayer film samples were sent.
The DHL tracking no. of the EVA interlayer film samples is 2927070713.
You will receive the EVA samples very soon.

Dear Peter
Thanks, the EVA film samples are well received, thanks very much for the extra ones.
We will start to do the test as soon as we have time next week, and we will feedback you the test result.

Dear Glazier P
So good to hear that you have received the EVA film samples.
We are look forward to your test results soon. The processing time and temperature file of the EVA interlayer film is in attachment for your info.

Dear Peter
We all agree that the test result of your eva film samples is very good, here is our first order details, please give us best discount:
EVA FILM EVAFORCE SUPER+ 0,38* 2300*100/roll – 120 rolls
EVAVISION MW MILKY WHITE 0,38*2000*50/roll – 80 rolls
EVAVISION SW SANDBLASTING WHITE 0,38*2000*50/roll – 80 rolls

Dear Glazier P
Thanks very much for your order, we will send you proforma invoice and related details soon.

……

Dear Glazier P
You have been using our EVA Interlayer Film massively, can you tell us what do you think of our EVA film? Are you happy with our EVA interlayer film quality?
Your feedback is highly appreciated.
Thanks very much.

Dear Peter
Most of the EVA film rolls are sold to our customers in our country.
We have already sold to several customers and it is very good. So far, the customers are very satisfied. Thanks, we will be happy to still buy from you in the coming future.

Dear Glazier P
Thanks very much for your feedback.
Peter Lin
Mail: cnc@cncglass.com benext77@hotmail.com
Skype: Cnext365

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;