History
Styrofoam is composed of ninety-eight percent
air, making it light weight and buoyant. Because
of its insulating properties and buoyancy, it was adopted in 1942 by the United States Coard Guard for use in a six-person life raft
In 1971 a Dutch Marine Salvage company, Smitt international, used styrofoam balls to
refloat part of a wrecked Bulk carier, the SS London Valour. Smit succeeded in towing the wreck for
about 90 miles (140 kilometres) but it then sank, spilling large amounts
of Styrofoam on the surface of the sea.
Styrofoam has since found a variety of uses. Dow
produces Styrofoam building materials, including insulated sheathing and pipe
insulation. The claimed R- value of
Styrofoam insulation is five per inch.
Dow also produces Styrofoam as a structural
material for use by florist and in craft products. Dow insulation Styrofoam has a
distinctive blue color; Styrofoam for craft applications is available in white
and green.
Styrofoam can be used under roads and other
structures to prevent soil disturbances due to freezing and thawing
·
Make head and hand the pumpkin in 3D
shape.
- In 1941, researchers in Dow's Chemical Physics Lab found a way to make foamed polystyrene. Led by Ray Mcintere, they "rediscovered" a method first discovered by Sweden inventor Carl Georg Munters. Dow acquired exclusive rights to use Munters' patents and found ways to make large quantities of extruded polystyrene as a closed cell foam that resists moisture.
u Uses
Styrofoam is composed of ninety-eight percent
air, making it light weight and buoyant. Because
of its insulating properties and buoyancy, it was adopted in 1942 by the United States Coard Guard for use in a six-person life raft
In 1971 a Dutch Marine Salvage company, Smitt international, used styrofoam balls to
refloat part of a wrecked Bulk carier, the SS London Valour. Smit succeeded in towing the wreck for
about 90 miles (140 kilometres) but it then sank, spilling large amounts
of Styrofoam on the surface of the sea.
Styrofoam has since found a variety of uses. Dow
produces Styrofoam building materials, including insulated sheathing and pipe
insulation. The claimed R- value of
Styrofoam insulation is five per inch.
Dow also produces Styrofoam as a structural
material for use by florist and in craft products. Dow insulation Styrofoam has a
distinctive blue color; Styrofoam for craft applications is available in white
and green.
Styrofoam can be used under roads and other
structures to prevent soil disturbances due to freezing and thawing
Making stryrofoam carving
(Halloween)
·
Draw the pumpkin shape and cut according
·
Make head and hand the pumpkin in 3D
shape.
·
Colour
the styrofoam and make the eye.
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