0731HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(SECOND2-2)

HOWHOWHOWHOW TOTOTOTO MAKEMAKEMAKEMAKE PVBPVBPVBPVB LAMINATEDLAMINATEDLAMINATEDLAMINATED GLASSGLASSGLASSGLASS WITHWITHWITHWITH PVBPVBPVBPVB FILMFILMFILMFILM POLYVINYLPOLYVINYLPOLYVINYLPOLYVINYL BUTYRALBUTYRALBUTYRALBUTYRAL

All Rights Reserved By:UCOLIN SILICONE TECH(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 VacuumFilming MachineContact Us: [email protected] / [email protected]/ [email protected]

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HOWHOWHOWHOW TOTOTOTO MAKEMAKEMAKEMAKE PVBPVBPVBPVB LAMINATEDLAMINATEDLAMINATEDLAMINATED GLASSGLASSGLASSGLASS WITHWITHWITHWITH

PVBPVBPVBPVB FILMFILMFILMFILM POLYVINYLPOLYVINYLPOLYVINYLPOLYVINYL BUTYRALBUTYRALBUTYRALBUTYRAL(2-2)(2-2)(2-2)(2-2)By Peter Shinwww.HelloGlass.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 glassTwo ovens and two times of roll extrusionClean the glassTemperature: 20-25℃, humidity:25%+/- 2%Prepressing ovenPrepressing oven

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

The second oven's temperature:If temperature is too low, the pre-laminated glass edge can not be sealed smoothly and theadhesion is not good;If temperature is too high, bubbles will be produced.

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=================================================================================Conditions for prepressing and expelling air when laminating glass with PVB FilmRoll extrusion way on the flat layer:The first roller: the glass surface temperature is about 35℃, with pressure 5-7 bar; and thegap 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 thegap between two rollers is 15% -20% smaller than the glass total thickness.

Vacuuming way on the curved laminating layer:Vacuum ring: silicone vacuum bagCold pumping:Temperature : 20-30℃; 22℃ is suggested.Vacuum degree: 550 -660mm HG;Time: About 5-20 minutes.

Heat pumping:Glass surface temperature: 95-105℃



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Time: less than 25 minutes

====================================================Air expelling when laminating safety glass with PVB FilmFactors 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 surfaceGlass's thicknessEach glass is not matched very well to the other glass after hot bending

====================================All Rights Reserved By:UCOLIN SILICONE TECH(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 MachineVacuum Filming MachineContact Us: [email protected] / [email protected]/ [email protected]=====================================

Autoclave when laminating safety glass with PVB interlayer filmPurpose:Dissolves the residuary air inside the PVB filmAllows PVB film flows and combine with the glassObtain required performance and transparency

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



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Temperature for releasing pressure: under 50℃

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Autoclave's working principle when laminating safety glass with Polyvinyl Butyral PVB film:PVB film:shapeless polymerAppears adhesive under low temperatureAppears flowable under high temperature

Temperature: enable the PVB film to flow and get shaped permanentlyPressure: enhance the adhesion between PVB film and glassTime: allows PVB film to become flowable

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

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Common problems for autoclave when laminating safety glass with Polyvinyl Butyral PVBfilm



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=Pressure get increase too quickly: the PVB film stays cool inside the autoclave; and it willcause the air running through if the glass edge was not sealed well or hot bending did notgo well.

=Pressure get increase too slowly: the air rest inside the PVB film will get expanding if thetemperature 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 glasscompletelyThe 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 insidethe soft film and becomes bubbles;The air under high pressure will diffuse from the glass center to the glass edge and laterbecomes bubbles because the pressure in the edge is lower.

All Rights Reserved By:UCOLIN SILICONE TECH(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 MachineVacuum Filming MachineContact Us: [email protected] / [email protected]/ [email protected]

0731HOW TO MAKE PVB LAMINATED GLASS WITH PVB FILM POLYVINYL BUTYRAL(SECOND2-2)

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