The EVA FILM is not Adhesive

The EVA FILM is not Adhesive

By peter shin

Have you faced the problem that the EVA FILM is not adhesive or not very adhesive when laminating glass with EVA FILM?

This post we are going to talk about this topic.

1. The temperature is not high enough to melt the EVA FILM and inspire the cross link reaction of EVA FILM. Please increase the temperature.

2. The heating time is not long enough to finish the reaction of the EVA FILM. Yes, the temperature is high enough to inspire the reaction of EVA FILM, but the keeping heating time is not long enough to finish the reaction. So yes, it’s adhesive but not very.

Please keep longer heating time.

3. The moisture of the glass or EVA FILM is too much. EVA FILM are less sensitive to moisture, but if it’s too high, it will do harm to the adhesion of EVA FILM.

Please dry the papers, glasses, and EVA FILM.

To be continued

All rights reserved by the EVA FILMS BLOG www.evafilms.com

The Parameters of EVA Film for Laminated Glass(1)

The Parameters of EVA Film for Laminated Glass(1)

By peter shin

Last article i wrote about the cautions of processing laminated glass with EVA FILM.

Today I would like to talk about the parameters of EVA FILM for laminated glass you should care about. And I also would explain how to test these parameters.

1. Radiation Resistance——the most important parameter. It does decide how many years the Laminated Glass with EVA Film can be used for outdoor.

How to test:

Make the laminated glass with EVA FILM subjecting to 2000 hours (different form different standard) of radiation. The samples of laminated glass with EVA Film are placed at a distance of 1,100mm from 16 ULTRAVITALUX lamps which was form a 1m*1m field. The temperature is maintained at 45℃ (5℃ tolerance )and the humidity is 50%.

To measure the durability, the luminous transmission has been measured by the wavelength between 380nm and 780nm before 2,000 hours of exposure to the ULTRAVITALUX lamps.

In the end, compare the differences of Light Transmittance and check the presence of any faults(bubbles, opaqueness, degumming etc)

To be continued

All rights reserved by the EVA FILMS BLOG www.evafilms.com

Self-exposing of Laminated Glass with EVA Film

Self-exposing of Laminated Glass with EVA Film

By peter shin

Last article i wrote about processing laminated glass with EVA FILM is Bubbles Problems of Laminating Glass with EVA Film (1) . and Bubbles Problems of Laminating Glass with EVA Film (2)

Today i still like to talk about the cautions of processing laminated glass with EVA FILM.

And today’s topic is self-exposing. Yes as you remembered, i have talk about this in The Problems of Laminating Glass with EVA FILM.

They are:

1) The laminated glass is cooling too fast. Please do not open the oven door to help cooling after the temperature of the laminated glass is lower than 75 degrees.

2) Please avoid the hot laminated glass touching the cold water.

3) Put some wood blocks between the laminated glasses to make the cooling is well-proportioned.

But today I want add some more.

The following situations also would cause self-exposing of laminated glass with EVA FILM.

4.) The quality of the glass is not good, which are easy to expose.

5.) The EVA FILMs are not eliminated the internal stress. Good quality EVA Film will be eliminated the internal stress make the EVA film less contracting.

If the EVA Film are not eliminated the internal stress, then when laminating the glass with EVA Film, the EVA Film’s internal stress would try to contract to its original state and expose the laminated glass.

6.) The silicon bag is not clean, which means maybe some block inside the silicon bag. So when the pre- laminated glass on the block and vacuuming is working, the pressure would break the laminated glass.

Hope all these info about processing laminated glass with EVA FILM is helpful to you.

All rights reserved by the EVA FILMS BLOG www.evafilms.com

Bubbles Problems of Laminating Glass with EVA Film (2)

Bubbles Problems of Laminating Glass with EVA Film (2)

I wrote an article Bubbles Solution for Laminated Class with EVA Film, and yesterday I wrote an article Bubbles Problems of Laminating Glass with EVA Film (1) .

Now we are going to continue the topic.

If you face the laminated glass with bubbles in edges, what’s wrong?

For this situation, they are two reasons:

1) It’s too early to put the laminating glass out of the oven, the temperature is still very high and the EVA FILM is still melting and reacting. When the laminated glass is getting cold, the melted EVA FILM is contracting, and the EVA Film can’t fully fill the gap between two glasses.

2)  It’s too early to stop the vacuuming.

And the cross link reaction of the EVA film is not totally finished and stable. And also the silicon 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.

3) Always remember you put the wire net on the vacuuming hole to make sure the vacuuming is not stop by the laminated glass on the hole. To be more perfect, also can use wire net over the laminated glass.

All rights reserved by the EVA FILMS BLOG www.evafilms.com

Bubbles Problems of Laminating Glass with EVA Film (1)

Bubbles Problems of Laminating Glass with EVA Film (1)

I wrote an article Bubbles Solution for Laminated Class with EVA Film, talked about the situations that bubbles come out the laminated glass. It is macro views. Today I like to talk about the other reasons in micro views that cause the bubbles in laminating glass with EVA Film.

1. The plainness of the tempered glass is bad.

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

2) Since the tempered glass’s plainness is worse than flat glass, you should use thicker EVA FILM interlayer for the tempered glass. Generally speaking, the tempered glass should be laminated with at least 1.52 mm thickness EVA Film Interlayer.

3) Only laminate one layer “pre- laminated glass” in a silicon bag every time. If you laminate two or more layers “pre-laminated glass” in a silicon bag, the vacuuming would not work perfect and cause the bubbles.

4)  If you laminated small pieces “pre-laminated glasses” at the same time, put the “pre –laminated glasses” in good warp and weft, which will help vacuum.

2. Check if the silicon bag is leaking.

1) Averagely speaking, a silicon bag can be used for several years. But check the silicon bag if your laminated glasses have bubbles.

2) Check the concavo convex of the edge of the silicon bag is sealed perfectly when processing laminated glass with EVA Film.

To be continued……

All rights reserved by the EVA FILMS BLOG www.evafilms.com