Indian Standard 3348: ‘Fibre Insulation Boards’ and BS 1142 Part 3: 1972 ‘Insulating Board-Softboard’ include all available International Standards and give the procedure for sampling. They also define six tests levels which insulating board must satisfy. These are density, bending strength, water absorption, thermal conductivity, sound absorption and surface spread of flame.
Improved acoustic properties are obtained by grooving insulating boards to part of their depth in various patterns.
Sizes generally available are:
Production tolerances: Permissible deviations in length, width and thickness from manufacturers stated size are as per those given in Table 1 in IS 3348 and Table 1 in BS 1142: Part 3, Smaller tolerances than those specified can be obtained by agreement.
Weight: Weight of boards varies according to brand. Typical weights (kg/m2) are 2.5-2.7 for 9mm thickness, 3.2-3.7 for 12mm, 4.4-5.4 for 18mm, and 6-7.5 for 25mm.
Density: Generally within the range of 230 to 330 kg/ml IS 3348 maximum is 400 kg/m3. BS 1142 maximum is 350 kg/m3.
Colour of most boards is various shades of cream and brown. Some boards are coated with a white primer for painting.
Special boards available: Painted, paper plastic or textile faced. Flame-retardant treated types are available on request.
BEHAVIOUR IN USE:
Fire Resistance: The contribution to the fire resistance of a structure is proportional to the thickness of the board. For example 12mm insulating board will contribute 15 minutes fire resistance when used as lining to wall or partition and 10 minutes when used as a ceiling.
Combustibility: Combustible as defined in BS 476 Part 4 and IS: 3348 clause 9.6.
Ignitability: not easily ignitable as defined in BS 476: Part 5 and IS:3348 clause 9.6.
Calorific value: is approximately 19.8 MJ/kg; thus when 12mm insulating board burns it yields about 60MJ/m2.
Spread of flame: Class 4 as defined in IS 3348 and BS 476 Part 7 when undecorated. Further treatments can be applied to achieve compliance with higher spread of flame requirements. Class 1 or 2 can be obtained by bitumen impregnation during or after manufacture. Improved spread of flame performance can also be obtained by painting the surface in the factory or on site with a flame-retardant paint.
|Look at what you can do with JOLLY BOARD SOFTBOARD
Jolly Soft Board can be effectively used for wall linings, and ceilings. When used for panelling and partitioning with adequate framework for support, insulation board helps absorb reflected sound.
Jolly Softboard, aesthetically covered with attractive fabrics serves as a practical and unobtrusive display board ideal for window dressing and other displays in all kinds of stores. Another fast growing application is pin board (a smaller size ready to use display or notice boards.)
Use of softboard in recording studios, auditoria and other places that require sound control results in effective reduction of reflected sound.
Soft board is also used for all purposes where good thermal insulation is required, in the form of wall lining, ceilings and roof linings. It is also used as core material for partitions and doors, for partition panels, and as anti-drum lining for metal partitions and machine casings. For purpose requiring a resilient material, such as a floor or carpet underlay, it assists in reducing impact sound transmission.
Due to its resilient nature Jolly Softboard is used as base material for expansion joint fillers.
Predecorated boards are available. In situations where humid conditions may arise bitumen-impregnated soft board should be specified.
Fungus resistance: Like other fibre building boards Jolly Softboards are not susceptible to attack by rot fungi and microfungi under normal circumstances of use. Superficial mould growth is not readily supported on any type of insulating board.
Thermal conductivity (k): shall not be more than 5.6 kcal/ cm/m2 h”c (or 0.65 mw/cm deg.)
Against the BS 1142 max: mean k-value: 0.058 W/m”C, the thermal conductivity (k) is 0.044 – 0.050 W/m”C.
Specific heat: 1580J/kg?C
Thermal diffusivity: 5.6 x 10″ m2/h
Sound absorption: A plain softboard has some sound absorption characteristics and will reduce reflected sound when used as wall or ceiling lining or as a cavity lining or backing to other materials.
Sound absorption co-efficient when determined by the standing wave method shall be as follows as per IS 3348.
Jolly Softboard has good durability. It will be damaged if subjected to high impact loads. Thermal insulation value is reduced if the board gets wet.
Softboard for packaging fragile item like Glassware
Softboard for Floor Underlay
Softboard for Wall Panels & Partitions