the galloping growth in the building activities in a developing
country like ours, roofing sheet, which is the key module
in all types of buildings, has got a tremendous market potential.
It is also a new technology capable of completely overtaking
asbestos roofing sheets by all aspects of efficiency, economy
and environment friendly benefits.
The introduction of Asphaltic Roofing Sheets from Maspack
greatly enhances the efficiency of the roofing in many ways.
Unlike the presently available light roofing sheets in the
market where the corrugation gets flattened due to its artificial
make, Maspack’s roofing sheets retains the shape and resistance
for years to come due to its state-of-the-art Vacuum Moulding
Maspack Corrugated Asphaltic Roofing Sheet production
process starts with the conversion of the waste paper into
pulp using a highly advanced Hydropulper. The pulp made
to the required consistency is then run through a vibrating
screen with traps. This combination removes all unwanted
materials from the pulp, which then flows into the pulp
tank. The cleaned and ready pulp is pumped to an overhead
pulp chest using a wide mould special pulp pump.
A multi disciplined state-of-the-art
moulding machine then transforms the 1% consistency pulp
that flows into its forming mould pattern into the correct
product profile. This is achieved by the vacuum suction
of the water from the pulp. When the water is removed by
vacuum, it leaves a fibre mat on to the mould surface, which
automatically takes the shape of the product. The wet profile
of the product is transferred from the surface of the forming
The wet product with a
carrier facility of identical shape is lead to a press,
which removes the excess water to give stability to the
product. After pressing, the wet product is separated from
the pellet and is loaded into the multi rack trolley. The
trolley is then pushed to the drier or drying yard for sun
drying. The corrugated sheets after drying is loaded on
to an impregnating cradle, moved by a travelling electric
The cradle then moves and gets it lowered/immersed into
the 200oC hot melt asphalt. The correct ratio of paper to
asphaltic impregnation is achieved by the heat level control
on the asphalt as well as the time set for the impregnation.
The product then moves through a coolant area and is transferred
into a conveyor that moves through a painting bay for getting
the required colour coat. The roofing sheet then is counted,
made into bundles and moves for dispatch to the depot.