PVB Interlayer

PVB interlayer is a polymer material made by polyvinyl butyral resin through the plasticizing and extrusion molding of the plasticizer DHA plastics. Its a translucent film which has a certain roughness and softness. PVB interlayer has high adhesive stress with inorganic glass,and excellent transparent,high mechanical strength,heat resistance, humidity resistance and other properties, it is the best adhesive material for laminated glass.

Character of PVB interlayer

Safety	Honghui PVB interlayer can absorb the mechanical shock to enhance the impact resistance performance of the laminated glass. It can also prevent damage and injury by holding dangerous glass pieces after breakage.
Sound insulation	The sound insulation of laminated glass is more effectively than normal glass's, because PVB interlayer can reduce the amplitude of sonic wave so as to effectively block the noise.
Structural integrity	Honghui PVB is quite tough and strong, When suffered from external shocks, and broken glass still adhere to the PVB while maintaining structural integrity without penetration.
Energy saving insulation	Laminated glass with PVB interlayer can filter infrared radiation of sunlight to insulate the heat.
Uv protection	Adding high-quality anti-UV, Honghui PVB can filter more than 90% UV radiation of sunlight.

Quality Detection

Test item	Standard	Typical value	Test condition	Testing instrument
Thickness	0.38±0.02	0.37-0.39	Online test,manual measuring	Scantec online gauge,dial pipe thickness gauge

	0.76±0.0
	1.52±0.02	1.50-1.54
Percentage of contraction	12% for 0.38	10-12%	60℃ ±20℃，15min	Blasting drying Oven
	8% for 0.76	3-5%
	5% for 1.52	1-3%
Roughness	15-45um	28-45um		0.1 Roughmeter
Tensile strength	20Mpa	20-25Mpa		LDS Electrical Tensile Test Machine
Elongation at break	200%	250-400%		LDS Electrical tensile Test Machine
Moisture	≤0.6%	0.35-0.55	40℃±2℃，3h	Electronic Balance,Vacuum drying oven
Haze	≤0.6%	0.3-0.4%	Laminated with 3mm float glass	WGT-S Light Transmittance Haze Meter
Light transmittance	≥85%	86-88%	Laminated with 3mm float glass	WGT-S Light Transmittance Haze Meter
2260g Drop Ball (Automotive )	No penetration within 5S after impact	No penetration	20℃±5℃，4h，2260±20g ball drop from 4m height
Pummel Test (Architectural)	≥6		-18℃±2℃，2h 75mm*300mm Laminated glass	500g hammer
High temperature resistance	No bubbles exceed 15mm from the original edge		300mm*300mm Laminated glass, 5h in Boiling Water	Boiling Water

Acoustic PVB sound insulation performance

Test item	Detection standard
thickness	0.760~0.900mm
Thickness of sound insulation	0.06-0.12mm
breadth	+2-10mm
moisture	0.30%~0.55%
Xanthic value	≤10
Roughness RZ	20-70um
Percentage of contraction	≤6.0%
Light transmittance	≥85%
Fog degree	≤0.6%
Bonding force knock value	Grade 3 to 6 / autoclave together
Tensile strength	≥15Mpa
Elongation at break	≥200%
Sound insulation	RW≥32dB
Laminated glass detection	Boiling, radiation resistance, humidity resistance, cold and heat shock resistance, penetration resistance, light distortion meet the national standard GB9656-2021

Packing and transportation

Packing: PVB interlayer is packed in vacuum aluminum bag,and then in horizontal wooden case(＞1200）or vertical carton(≤1200mm）

item	PE Interleaving PVB Item	Cryogenic film	aim
PE film	PE film	PE film	anti-adheison
Tube core	PVC		Rolling
Inner packing	Vacuum Aluminum Foil membrane	PVC	Anti-moisture
Outer box	Horizontal wooden case Vertical Carton or wooden case	Vacuum Aluminum Foil membrane	Protection

Storage:The interleaving PVB well packed in vacuum aluminum membrane needs to be stored in dry and clean warehouse with normal temperature (better less than 30℃).But the unpacked PVB should be kept in below 18-25℃，25-30％ relative humidity room.he interleaving PVB well packed in vacuum aluminum membrane needs to be stored in dry and clean warehouse with normal temperature (better less than ℃).But the unpacked PVB should be kept in below 18-25℃，25-30％ relative humidity room. The interleaving PVB well packed in vacuum aluminum membrane needs to Transportation: Avoiding insolation，rain and shock..

Shelf life: 2years shelf life for well packed PVB in dry and suitable warehouse; it can keep 6 month for unpacked film in 18-20℃，25-30％ relative humidity room.