PMMA Sheet (Polymethyl Methacrylate)

PMMA Sheet (Polymethyl Methacrylate)

GUJPOL-S is the trade name of Acrylic sheets manufactured by GSFC. GUJPOL-S sheets are manufactured from virgin MMA by cell casting process the best optical properties among all transparent plastics. GUJPOL-S has an excellent resistance to the effect of long exposure to sunlight, heat and weather

Specifications - Typical Average Properties (3 mm thick clear transparent sheet)

Properties	Method (ASTM)	Value
Specific Gravity	D-792-64T	1.18-1.20
Light Transmittance total	D-1003-61	92%
Refractive index nD	D-542	1.49
Tensile strength at rupture	D-638-64T	570-760 kg/cm2
Elongation at rupture	D-638-64T	2-7 %
Compressive strength at yield	D-695-63T	1260 kg/cm2
Impact strength (charpy unnotched)	D-256-56	16 - 20 kg/cm2
Izod milled notched	D-256-56	1.6-2.2kg-cm/cm
Rockwell hardness	D-785-62	M 100
Heat forming temperature		140-180°C
Heat distortion temp 2°C/min. at 264 p.s.i.	D-648-56	100°C
Maximum recommended continuous service temperature		85°C
Volume resistivity	D-257-61	>1015 ohm-cm
Burning rate (flammability)	D-635-63	30 mm/min
Water absorption	D-570-63	0.3%
Residual monomer (Wt %)		2.0 max.

Application

• Light fitting and fixtures.
• Street light covers.
• Sanitary articles.
• Sign-boards and novelties.
• Helicopter canopies and other defence items

The outstanding features of Gujpol-S sheets are

• Light in weight; It has only half the weight of glass.
• Weather resistance; Longer period of resistance to sunlight and other weather conditions.
• Light absorption; Minimum in clear transparent sheets.
• Wide range; Transparent, translucent and opaque colours.
• High surface gloss.
• Easy formability and machinability.
• Low thermal conductivity; Almost equivalent to phenolics and only one sixth that of glass.
• Resistance to a wide range of chemicals insoluble in most inorganic chemicals but dissolves in ketones, esters, aromatic hydro carbons,chlorinated solvent etc.

Packing

• GUJPOL-S well masked with craft paper on both side and packed in standard packing in thick corrugated paper and bundled with straps.