HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(2-2)

HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(2-2)
By Peter Shin
www.HelloGlass.com
All rights reserved by CNC-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 www.HelloGlass.com
Mail: cnc@cncnext.com
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benext77@hotmail.com

 

 

SILICONE LAMINATE BAG FOR EVA LAMINATING MACHINE silicone@silicone4.com
SILICONE BAG FOR PVB AUTOCLAVE VACUUMING silicone@silicone4.com
www.ucolin.com www.silicone4.com

If the air is not expelled completely:
Bubbles may appear;
It may cause delamination;
The laminated glass’ thermal stability is not good;
The glass may get cracked inside the autoclave.
======================================================
=====================================
Air expelling, prepressing and edge sealing when making PVB laminated glass
Two ovens and two times of roll extrusion
Clean the glass
Temperature: 20-25℃, humidity:25%+/- 2%
Prepressing oven
Prepressing oven

Combining room:
The first oven’s temperature:
the pre-laminated glass may get crack if the temperature is too low
The pre-laminated glass edge will get sealed earlier than expected if the temperature is too high

The second oven’s temperature:
If temperature is too low, the pre-laminated glass edge can not be sealed smoothly and the adhesion is not good;
If temperature is too high, bubbles will be produced.
=================================================================================
Conditions for prepressing and expelling air when laminating glass with PVB Film
Roll extrusion way on the flat layer:
The first roller: the glass surface temperature is about 35℃, with pressure 5-7 bar; and the gap between two rollers is about 10% smaller than the glass total thickness.

The second roller: the glass surface temperature is 65-75℃,with pressure 5-7bar; and the gap between two rollers is 15% -20% smaller than the glass total thickness.
Vacuuming way on the curved laminating layer:
Vacuum ring: silicone vacuum bag
Cold pumping:
Temperature : 20-30℃; 22℃ is suggested.
Vacuum degree: 550 -660mm HG;
Time: About 5-20 minutes.

Heat pumping:
Glass surface temperature: 95-105℃
Time: less than 25 minutes

====================================================
Air expelling when laminating safety glass with PVB Film
Factors affecting normal air expelling:
Temperature required for glass is lower than 25℃, and for PVB lower than 18 ℃。
Cold pumping time is at least 5-20 minutes, with temperature 22℃.
Vacuum degree: absolute vacuum 80% (latm/100kPa)
Vacuum ring’s temperature: lower than 30 ℃. 20-25 ℃ is recommended.
Rheology and the grains on PVB Film’s surface
Glass’s thickness
Each glass is not matched very well to the other glass after hot bending
====================================
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(1)-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating
(2)-Silicone Sheet for EVA Glass Laminating Machine
(3)-Silicone Bag for PVB Glass Laminating Auto-clave
(4)-Silicone Rubber Sheet for Solar Cell Module Laminating Machine
(5)-Silicone Sheet for Wood Door Vacuum Laminating Machine Vacuum Press Machine Vacuum Filming Machine
Contact Us: uc@ucolin.com / www.ucolin.com
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=====================================

Autoclave when laminating safety glass with PVB interlayer film
Purpose:
Dissolves the residuary air inside the PVB film
Allows PVB film flows and combine with the glass
Obtain required performance and transparency

Basic condition and requirement:
Temperature and pressure can get increased simultaneously, but the pressure can not get increased to quickly.
Pre-laminated Glass’s constant temperature: 135-145℃
Pre-laminated Glass’s pressure under constant temperature: 12-14 bar
Time for constant temperature and pressure: at least 20 minutes
Temperature for releasing pressure: under 50℃

=================================

Autoclave’s working principle when laminating safety glass with Polyvinyl Butyral PVB film:
PVB film:
shapeless polymer
Appears adhesive under low temperature
Appears flowable under high temperature

Temperature: enable the PVB film to flow and get shaped permanently
Pressure: enhance the adhesion between PVB film and glass
Time: allows PVB film to become flowable

Notes: the thicker the glass, the longer time for the autoclave’s cycle.

 

===========================================

Common problems for autoclave when laminating safety glass with Polyvinyl Butyral PVB film
=Pressure get increase too quickly: the PVB film stays cool inside the autoclave; and it will cause the air running through if the glass edge was not sealed well or hot bending did not go well.

=Pressure get increase too slowly: the air rest inside the PVB film will get expanding if the temperature increases too fast, and becomes bubbles that will rift the glass edge.

=the time for constant temperature and pressure is too short:
The PVB film does not flow completely, and so it can not got contact with the glass completely
The adhesion becomes worse;
The glass clearness will get reduced consequently

=the temperature is too high when releasing pressure:
The PVB film is still too hot and soft at the meantime;
The high pressure air get together inside the glass edge, and get saturation;
If the pressure reduce too suddenly, the air under high pressure will get expanded inside the soft film and becomes bubbles;
The air under high pressure will diffuse from the glass center to the glass edge and later becomes bubbles because the pressure in the edge is lower.

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(1)-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating
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(4)-Silicone Rubber Sheet for Solar Cell Module Laminating Machine
(5)-Silicone Sheet for Wood Door Vacuum Laminating Machine Vacuum Press Machine Vacuum Filming Machine
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HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(2-1)

HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(2-1)
By Peter Shin
www.HelloGlass.com

All rights reserved by CNC-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 www.HelloGlass.com
Mail: cnc@cncnext.com
benext77@gmail.com/
benext77@hotmail.com

 

 

SILICONE LAMINATE BAG FOR EVA LAMINATING MACHINE silicone@silicone4.com
SILICONE BAG FOR PVB AUTOCLAVE VACUUMING silicone@silicone4.com
www.ucolin.com www.silicone4.com

The storage and protection of PVB film when laminating safety glass with Polyvinyl Butyral PVB film
Warehouse condition:
Indoor, Normal temperature, humidity lower than 65%
Storage period:
To be stored in buyer’s warehouse less than 24monthes after the producing date
Don’t open the package if it’s not used immediately.
Prevent the package from getting wet.
Put the PVB film into the combining room for at least 24 hours before use.
The rest PVB film must be stored in a room with temperature and
moisture control.
======================================================

Glass cleaning and requirement when laminating safety glass with Polyvinyl Butyral PVB film
Purpose:
Erase any oil or dust on the glass surface
Enhance adhesion capacity

Basic condition and requirement:
Clean the glass. City-water is available
Rinse the glass with treated water only.
Water quality requirement: <30 uS or >1M Ω,Hardness <10ppm,Water
temperature 40-60℃
The glass must be dried completely. Both hot wind and cold wind are
workable, but the wind should be filtered first so as to prevent
contamination.
=========================================

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(1)-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating
(2)-Silicone Sheet for EVA Glass Laminating Machine
(3)-Silicone Bag for PVB Glass Laminating Auto-clave
(4)-Silicone Rubber Sheet for Solar Cell Module Laminating Machine
(5)-Silicone Sheet for Wood Door Vacuum Laminating Machine Vacuum Press Machine Vacuum Filming Machine
Contact Us: uc@ucolin.com / www.ucolin.com
umewe360@gmail.com/ umewe360@hotmail.com

===========================================
Requirement for combining room when laminating safety glass with Polyvinyl Butyral PVB film
Basic condition and requirement:
Temperature: 20-25℃
Humidity: 23% +/- 2%
Double doors
Indoor air must pass through the filter
A carpet able to suck up the dust should be put between the double doors.
It’s necessary to keep clean the indoor floor and devices.
Operating workers must wear clean overalls that will not be dehairing,
and also wear glove and cap to prevent causing contamination.

 

=============================
Glass combining when laminating safety glass with Polyvinyl Butyral PVB film
Note: glass surface temperature: 20-40 ℃,
Suggest control temperature: 25-30 ℃

If temperature is higher than 40℃:
The PVB film will get shrink;
PVB film wrinkle will appear;
The film will get sealed earlier than expected;
The PVB film will get soft and adhere to the glass;
There will be lots of air inside the film.

If temperature is lower than 20 ℃:
The PVB film surface will be too smooth to get fixed;
It will be very difficult for the glass and the PVB film to get adhered;
It will be difficult to get rid of the gas and trim the edge of the
laminated glass;
There may be flaw on the edges.
PVB film temperature: 20-25℃
Combining process:
The PVB film should be 5-10mm bigger than the glass;
The PVB film is put on the glass on level stage;
The PVB film can not be pull when its edge is being trim;
2-5mm PVB film should be left on the edge after trimming.

The four edges of the upper glass should be aligned with that of the down glass.
Check carefully whether there’s any contaminating stuff on the glass or the film.

===========================================================================
Prepressing and air expelling when laminating safety glass with Polyvinyl Butyral PVB film
Purpose:
To get rid of the air leaving between the glass and the film
To pre-combine the glass and the film before it’s put into the autoclave
To seal up the edge in order to avoid the air permeating into the laminated glass again.
All Rights Reserved By:
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(1)-Silicone Vacuuming Bag for EVA Glass Laminating Machine/Privacy Glass Laminating
(2)-Silicone Sheet for EVA Glass Laminating Machine
(3)-Silicone Bag for PVB Glass Laminating Auto-clave
(4)-Silicone Rubber Sheet for Solar Cell Module Laminating Machine
(5)-Silicone Sheet for Wood Door Vacuum Laminating Machine Vacuum Press Machine Vacuum Filming Machine
Contact Us: uc@ucolin.com / www.ucolin.com
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Vacuuming And Heating Instruction of Polyvinyl Butyral PVB Interlayer Film

Vacuuming And Heating Instruction of Polyvinyl Butyral PVB Interlayer Film
www.helloglass.com
All rights reserved by CNC-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
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Preheating and Exhaust of PVB Film:
After the glass and Polyvinyl Butyral PVB interlayer film is combined, there are some air between the PVB interlayer film and the glasses. PVB Interlayer Film can dissolve some of air by itself, but not very much of it. To extrude the air out, here are the methods:
+Hot roller extrude exhausting air
Hot roller exhausting air has many ways: single thermostat chamber with double rollers or double thermostat chambers with double rollers.
Single thermostat chamber with double rollers: usually for laminating flat glass with Polyvinyl Butyral PVB interlayer film. When pre-laminated glass goes through the frist roller, most of air will be squeezed  out. Then the pre-laminated glass goes into the thermostat chamber to heat, then, go through second roller to extrude exhaust after heating. At this most, air isolation and edge seal is finished at the same time, the pre-laminated glass looks prey translucent while the narrow area around edge shows transparent.
The temperature control is very important, in order to expulsion of air and seal sides of pre-laminated glass successfully, temperature should be kept about 70-80 degree after going through the second roller.
If you doesn’t find the prey translucent area after the second rolling, which means the glass temperature is too low. On the contrary, if the temperature is too high, edges of the pre-laminated glass will be sealed too early, which will stop squeeze air out, then bubbles will appears in the laminated glass.
Vacuuming exhausting air
This method is specially for laminating uneven glass with PVB interlayer film, such as automobile windshield glass, bending glass.
Put the pre-laminated glass into a vacuum bag or put vacuum rubber ring to seal the glass, then start  the vacuum pump.
The procedure is divided into two steps: cold vacuuming period and hot vacuuming period. In the cold vacuuming period, the temperature is about 25 degrees and holding time about 15 minutes, and the negative pressure should be at least 0.8 bar. In the hot vacuuming period, temperature is about 80-110degrees, and holding time about 30 minutes.
And the most suitable temperature and time of hot vacuuming exhausting air depends on the machine and producing speed.The transparency of the laminated glass is better if it’s made of the hot vacuuming exhausting air method.
High-pressure Molding of PVB Interlayer Film
The Pre-laminated glass have went through the Preheating and Exhausting Air procedure, but the whole pre-laminated glass still have air inside the laminated glass. In order to finally melt the PVB Interlayer film and exhausting all the air out, the pre-laminated glass should be put into the higher pressure laminating autoclave.
There are three steps:
+Heating
Put the pre-laminated glass vertically on the bracket, make sure the space between the two pre-laminated glass is equal, so each pre-laminated glass will get the same pressure. Make sure the pre-laminated glass not touch the metal part of the machine, to prevent the part of pre-laminated glass get too high temperature and break out. Close the autoclave and start heating. After the temperature rise up to 50 degree. Increase the pressure inside the autoclave. It’s suggested that the speed of increasing pressure and temperature is :0.06MPA/MIN and 5 degree/min. If the temperature and pressure is not synchronous, please adust the machine. If temperature is too fast, then stop increasing the temperature until the pressure catch up, vice verse .
+Maintaining Pressure Stage:
The temperature and pressure are very important parameters for making  laminated glass successfully. When the temperature and pressure reach to the setted point (like 120-140 degrees), pay attention to these two parameters carefully. If the temperature is lower than  130 degree, the pressure time should be  longer.But if the temperature is lower than 120 degree, it’s not helpful to keep the pressure time longer. And the laminated glass may be not adhesive or not very strong. If the pressure is less than 1.2-1.4MPA, the time for pressure should be longer, but at the same time, the temperature should be 120-140 degrees. If the temperature is higher than 160 degree, the PVB interlayer film will turn yellow. And the laminated glass is failure.
+ Cooling with pressure stage
After the maintaining pressure stage, it’s time to cooling the laminated glass. Still maintain the pressure and open the cooling water to reduce the temperature. When the temperature reaches 45 degree, start to reduce the pressure. When open the autoclave door, check the temperature of the laminated glass up and down, make sure the temperature of the laminated glass is even. Don’t reduce the pressure too early, otherwise the bubbles would appear on the edges of the laminated glass.

CNC-INTERLAYER TECH:
【1】CNC-Force® EVA INERLAYER FOR ARCHITECTURAL LAMINATED GLASS
【2】CNC-Smart® SMART FILM FOR PRIVACY SWITCHABLE GLASS
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Technical Induction of Polyvinyl Butyral PVB Interlayer Film

Technical Induction of Polyvinyl Butyral PVB Interlayer Film
All rights reserved by CNC-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 www.HelloGlass.com
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By Peter Shin www.HelloGlass.com
Polyvinyl Butyral PVB Interlayer Film

Polyvinyl butyral PVB interlayer film is the resin that compounded from polyvinyl alcohol reacted with butyraldehyde.  Polyvinyl butyral PVB interlayer film is usually implied in the situation that needs strong binding, toughness and flexibility. Polyvinyl butyral PVB interlayer film as a protective interlayer film, is often used to make automotive laminated glass and architectural laminated glass. Polyvinyl butyral PVB interlayer film has many properties: Impact resistance, great adhesion, sound control, UV-radiation filtered, and good aging resistance.
Technical Parameters of Polyvinyl Butyral PVB Interlayer Film
Note: Following data is general number of PVB Film, and the data may be different of different Polyvinyl Butyral manufacturers, because the formula of manufacturing Polyvinyl Butyral may be different.
Property Items PVB
Density 1.069g/cm³
Tensile Strength ≥ 20MPa
Elongation  ≥ 200%
Visible Light Transmission Rate 88.5%
Haze ≤ 0.4%
Ultraviolet Radiation Blocking Rate 99%
Weather Resistance
(85℃,85% Humidity,UV,1000 hrs) <3.0% Change of Transmittance
Moisture Absorption  0.4-0.6%
Shrinkage  <6%
High Temperature Resistance Qualified
Moisture Resistance Qualified
Impact Resistance Against Shot-Bag Qualified
Radiation Resistance Qualified
Ball Impact Peeling Resistance Qualified
Polyvinyl Butyral PVB Interlayer Film for Laminated Glass
Polyvinyl Butyral PVB interlayer film have the impact resistance. The single  flat glass would lead to serious injuries to human being or other properties when it’s broken, but Laminated glass with Polyvinyl Butyral PVB interlayer film can stick the glass together when it’s impacted, which can remain it’s safety. The safety of the laminated glass with Polyvinyl Butyral PVB interlayer film is popularly recognized as safety glass in architectural design.
And Polyvinyl Butyral PVB is good at penetration resistance, so is better than tempered glass in Automotive windshield implication.
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
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Procedure Instruction of Pre-Laminating Polyvinyl Butyral PVB Interlayer Film

Procedure Instruction of Pre-Laminating Polyvinyl Butyral PVB Interlayer Film
All rights reserved by CNC-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

www.HelloGlass.com
Mail: cnc@cncnext.com
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1.
Clean the glass, better use the softened water to clean the oil, dust, flaw on the glass surface. Then dry the glass and put away in the laminating room.
2.
When cutting the Polyvinyl Butyral PVB interlayer film according to the glass, make sure the Polyvinyl Butyral PVB interlayer film only 2mm extra larger than the glass, or the too much extra Polyvinyl Butyral PVB interlayer film will seal the laminated glass before all the Polyvinyl Butyral PVB interlayer film is totally melted. 3.
Requirement of Pre-Laminating Room for Polyvinyl Butyral PVB interlayer film
Pre-laminating room’s environment is very important for manufacturing successfully laminated glass with Polyvinyl Butyral PVB interlayer film. There are some requirements:

+Install double doors, and the double doors not open at the same time and better install wind-shower equipment in the middle of double doors.

+The temperature inside the pre-laminating room should keep at 18-20 degrees and humidity at 20%-30%.
+Workers should wear antistatic suit, glove, hat.
+Regularly clean the equipments and pre-laminating room.
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
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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

All rights reserved by CNC-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

www.HelloGlass.com
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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:

 

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【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
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Bubbles in Middle of Safety Laminated Glass of Polyvinyl Butyral PVB Interlayer Film

Bubbles in Middle of Safety Laminated Glass of Polyvinyl Butyral PVB Interlayer Film

By Zac www.helloglass.com

All rights reserved by CNC-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
www.HelloGlass.com
Mail: cnc@cncnext.com
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Reason Possibility 1:
In the procedure of roller exhausting air, it’s too early to seal the edges of the pre-laminated glass, so the air can not be exhausted out completely in the second roller.

Solution:
Adjust the speed and temperature in the pre-laminating procedure, make sure the pre-laminated glass is not sealed before the second roller exhausting air stage.  Or adjust the speed of and temperature of the silicone rubber ring, to make sure the air is totally exhausted out.
Reason Possibility 2:
The Polyvinyl Butyral PVB interlayer film already absorbed too much moisture.

Solution:
Check the moisture of the Polyvinyl Butyral PVB interlayer film, and the humidity of the laminating room and glass surface.

Reason Possibility3:
The plainness of the tempered glass is not good enough.
Solution:
Choose good quality tempered glass, or use thicker Polyvinyl Butyral PVB interlayer film.

 

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(Product 3.) China Smart Switchable Film for Privacy Glass, Smart Glass
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(5)Contact Us: cnc@cncnext.com/ eva@evafilms.com /
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Bubbles at Edges of Laminated Glass with Polyvinyl Butyral PVB interlayer film

Bubbles at Edges of Laminated Glass with Polyvinyl Butyral PVB interlayer film
www.helloglass.com

All rights reserved by CNC-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

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

Condition:
Small bubbles at the edges of safety laminated glass with Polyvinyl Butyral PVB interlayer film.

Reason: 1)
When the autoclave decreasing the pressure, although the temperature detector shows the temperature is under 50 degree Celsius, due to the glass thickness and square, sometimes, the glass temperature is still higher than 50 degree Celsius, so if the pressure is lowering, some air will absorbed into the glass edges.

Solution:
Even when the temperature detector shows the temperature is lower than  50 degree, don’t decrease the pressure too hurry, wait for some minutes, make sure the real temperature of the glass is lower than 50 degree. If the laminated glass is thick, or many layers, or large square, then the waiting time should be a little longer.

Reason:2)
The tempered glass is not high quality enough, and the plainness of the tempered glass is not good enough.

Solution:
Choose better quality tempered glass, or use the thicker Polyvinyl Butyral PVB interlayer film.

Reason:3)
Maybe the detector of the temperature and pressure is not correct.

Solution:
Make sure the temperature and pressure parameters is correct .
ALL RIGHT 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

3 Key Properties of Polyvinyl Butyral PVB Interlayer Film

3 Key Properties of Polyvinyl Butyral PVB Interlayer Film

All rights reserved by CNC-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.CNCnext.com www.HelloGlass.com www.CNCglass.com
Mail: cnc@cncnext.com
benext77@gmail.com/
benext77@hotmail.com

 

 

SILICONE LAMINATE BAG FOR EVA LAMINATING MACHINE silicone@silicone4.com
SILICONE BAG FOR PVB AUTOCLAVE VACUUMING silicone@silicone4.com
www.ucolin.com www.silicone4.com

By Peter Shin www.helloglass.com
Polyvinyl Butyral PVB Interlayer Film Properties: Safety and Security

Laminated glass with Polyvinyl Butyral PVB interlayer film has strong elasticity. Polyvinyl Butyral PVB interlayer film have impact resistance, and also have penetration resistance, the shatters will be sticked together by the Polyvinyl Butyral PVB interlayer film. And the safety of laminated glass is remained.Whether the laminated glass with Polyvinyl Butyral PVB interlayer film is installed vertically or horizontally,the accident impact on laminated glass with Polyvinyl Butyral PVB interlayer film is still working great. Performance of resistance and penetration of Polyvinyl Butyral PVB interlayer film is better if the thickness of Polyvinyl Butyral PVB interlayer film is more.

Polyvinyl Butyral PVB interlayer Film Properties: Sound Control

Polyvinyl Butyral PVB interlayer film has great sound insulation, it can high decrease the noise, and make you comfortable inside the house or car. The thicker Polyvinyl Butyral PVB interlayer film you use, the sound insulation would be better.

 
Polyvinyl Butyral PVB interlayer film Properties: Light Control

Polyvinyl Butyral PVB interlayer film can absorb 99% ultraviolet radiations, because of special auxiliaries inside the Polyvinyl Butyral PVB interlayer film. So the laminated glass with Polyvinyl Butyral PVB interlayer film can protect people and furniture, plastic goods, etc inside the building from harmful ultraviolet rays. And also Polyvinyl Butyral PVB interlayer film can absorb infrared lights, so the laminated glass with Polyvinyl Butyral PVB interlayer film can insulate heat from the sunlights. Some manufacturer, like BRIDGESTONE, they also put a PET between interlayer film to strengthen the cool properties.

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