PVB middle layer films use for produce saft glass
PVB Film is a macro molecule material made with Polyvinyl Butyral
resin plasticized and extruded by plasticize and additives,and
mainly used for producing laminated safety glass.
The advantages and characteristics of PVB layer films
High Safety building material:
Due to high tenacity and adhesion of PVB films, the films can
endure external impact and are hard to penetrate through. Although
the glass might be broken, it reduces the damage level dramatically
since the glass fragment will not scattered around.
High Energy saving building material:
PVB films can reduce radiations from the sun to penetrate into
buildings and automobiles, which can balance the high temperature
sunlight. Thus, will save electricity consumption for air-condition
in buildings and automobiles effectively.
Sound proof:
PVB films have a good characteristic of Sound proof, which not only
block external noise from outside but also provide a private space.
Absorption of UV rays:
PVB films have a good characteristic of UV rays absorption, prevent
discoloration due to UV rays from the sun.
Aesthetics of buildings:
PVB films provide multiple colors to choose, harmonizing with the
surroundings and satisfying designers demand.
Technical parameters
| No. | Classfication
ltems | 0.38mm | 0.76mm |
| 1 | Appearance | |
| 1.1 | Appearances | Achromatic or slinghtly yellow lucid film With velvet surface that
has no scar or crease . |
| 1.2 | Dotted waste sundries and air buhbles | |
| ≤0.05 | Allowed if exist separately |
| 0.05 | Not exceeding 8 places per film | Not exceeding 5 places per film |
| | Making marks Define an extanded 0.5 metar film per place Add one
extra meter par place |
| 2 | Size | |
| 2.1 | Thickness ( mm ) | 0.38±0.02 | 0.76±0.02 |
| 2.2 | Uniformity | Horizontal thickness warp should not exceed 15um at a distance of
25mm; horizontal Ehickness warp Should not exceed 20um at a
distance of 50cm. |
| 2.3 | Length tolerance (m ) | 0-5 | 0-2 |
| 2.4 | Width tolerance ( mm ) | 0-20 |
| 3 | Moisture ( % ) | 0.4-0.6 |
| 4 | Extending intansion ( MPa ) | ≥20.0 |
| 5 | Ruplura extending rate (%) | ≥200 |
| 6 | Fograge (%) | <0.4 |
| 7 | Shrinking rate (60/15min) ( % ) | ≤12 |
Every PVB layer rolls should be sepatared by PE film and vacuumed
by aluminum foil,and put into wooden case.
The product should be stocked in a clean warehouse and normal
temperature.It is prohibited to leave it under direct sunlight.Once
the packing is broken or opened,it should be stocked under
temperature of 15-25 ℃ and a relative humidity of 20%-40%.
Well-packed and under nomal temperature,the product has a quality
guarantee of 2 years.
