| 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 | ||
Description:
PVB is the abbreviation of polyvinyl butyral. PVB film is made from PVB resin and plasticizer. It is a
non-toxic and smell-free soft sheet material with thickness between 0.38mm and 1.14 mm. It is the
best material for the interlayer of safety glass.
PVB interlayer is a macromolecule material molded by polyviny, butyral resin that is plasticized and
extruded by plasticity. Our PVB film with excellent light transparency, heat and cold resistance,
elasticity, is well-sticking to inorganic glass and the making of laminated safety glass. Usual
thickness specification is between 0.2 mm - 2 mm.
PVB interlayer is mainly used in making laminated safety glass. Laminated glass is a special
glass which is inserted with PVB film between two layers of common glass, which under high
heating temperature and pressure, binds to create a single construction. Because of PVB
laminated glass with the function of safety, heat preservation, noise proof, and ultraviolet
resistance, etc, it is widely used in areas such as high-rise building and auto. PVB film
with special formula is also used in aeroplane, space flight
