VST Foamed Acrylic Tapes
Distributed in Canada by All-Tape Solutions
VST foamed acrylic tapes – an introduction
VST foamed acrylic tapes are formulated from acrylic copolymers and monomers to produce a self
adhesive visco-elastic foam, which is a high density, closed cell foam, cured by using U.V. light.
There are no solvents used in the manufacturing process. The foam is produced by coating on a
‘knife over roller’ coating head. VST Foam Tapes form permanent bonds to a wide variety of high
surface energy substrates under extreme environmental conditions.
VST tape thickness ranges between 0.25mm (10mil) and 3mm (120mil).
VST acrylic foams are available in White, Grey and Clear versions.
VST white and grey foam versions have glass micro-spheres as a filler giving exceptional cohesive
strength to the foam.
VST foam density of white and grey versions is approximately 800kg/m3 (1348 lb/yd3), and the
clear version is 1000kg/m3 (1686 lb/yd3).
VST tolerances on the thickness of the foams is +/- 50 micron.
VST liners are 135 micron red polyethylene or 120 gsm white PE coated paper.
VST tape - construction characteristics
VST release paper or red
PE film liner
VST viscoelastic core section
with 100% closed cell structure
VST pressure-sensitive surfaces
Approvals
Hi-Bond Tapes Ltd - 6 Series grey acrylic foam tapes in thicknesses from 0.8mm to 2mm thick
are approved with Underwriters Laboratory to UL 746C for polymeric materials. For use in the
electronics and allied industries.
Testing was conducted on the following substrates:
Glass, Aluminium, Tedlar™ , Galvanised Steel, Polycarbonates and PPE.
VST tape variations
PRODUCT CODE
COLOUR
THICKNESS
(mm / inch)
FOAM DENSITY
(Kg/m3)
LINER TYPE
LOG DIMENSIONS
(mm x M)
VST4040W
WHITE
0.40 (16mil)
850
Film
400 x 33
VST4064W
WHITE
0.64 (25mil)
850
Film
400 x 33
VST4110W
WHITE
1.10 (45mil)
850
Film/Paper
400 x 33
VST4200W
WHITE
2.00 (80mil)
850
Film
400 x 16.5
VST4025C
CLEAR
0.25 (10mil)
1000
Film
400 x 66
VST4050C
CLEAR
0.50 (60mil)
1000
Film/Paper
400 x 33
VST4100C
CLEAR
1.00 (40mil)
1000
Film/Paper
400 x 33
VST4150C
CLEAR
1.50 (60mil)
1000
Film
400 x 25
VST4200C
CLEAR
2.00 (80mil)
1000
Film
400 x 16.5
VST4040G
GREY
0.40 (16mil)
850
Film
400 x 33
VST4064G
GREY
0.64 (25mil)
850
Film
400 x 33
VST4080G
GREY
0.80 (32mil)
850
Film
400 x 33
VST4110G
GREY
1.10 (45mil)
850
Film
400 x 33
VST4150G
GREY
1.50 (60mil)
850
Film
400 x 25
VST5064W
WHITE
0.64 (25mil)
850
Film
400 x 33
VST5110W
WHITE
1.10 (45mil)
850
Film/Paper
400 x 33
VST tape variations.. cont’d
PRODUCT CODE
COLOUR
THICKNESS
(mm/inch)
FOAM DENSITY
(Kg/m3)
LINER TYPE
LOG DIMENSIONS
(mm x m)
VST6040G
GREY
0.40 (16mil)
780
Film/Paper
400 x 33*
VST6064G
GREY
0.64 (25mil)
780
Film
400 x 33*
VST6080G
GREY
0.80 (32mil)
780
Film/Paper
400 x 33*
VST6110G
GREY
1.10 (45mil)
780
Film/Paper
400 x 33*
VST6150G
GREY
1.50 (60mil)
780
Film/Paper
400 x 25*
VST6200G
GREY
2.00 (80mil)
780
Film
400 x 16.5*
VST6025B
BLACK
0.25 (10mil)
780
Film
400 x 66*
VST3040G
GREY
0.40 (16mil)
780
Film
400 x 33*
VST3120G
GREY
1.20 (47mil)
780
Film
400 x 33*
VST3200G
GREY
2.00 (80mil)
780
Film
400 x 16.5*
VST7025W
WHITE
0.25 (10mil)
1500
Paper
400 x 66
VST7064W
WHITE
0.64 (25mil)
1500
Film
400 x 33
VST7120W
WHITE
1.20 (47mil)
1500
Film
400 x 33
VST6064WFR
WHITE
0.64 (25mil)
1500
Film
400 x 33
VST6110WFR
WHITE
1.10 (45mil)
1500
Film
400 x 33
VST Laminated Safety Glass
•
Traditional manufacturing methods use PVB Film (POLYVINYL BUTYRAL)
between two sheets of glass. Glass sheets are then autoclaved at high
temperature and pressure.
•
Main Disadvantage: High cost of capital equipment: Autoclave Machine
•
Liquid resin is the alternative; injected in between two sheets of glass that are
bonded together with transparent V.S.T. The resin is either U.V. cured or it is
cured at room temperature, dependent on formulation.
•
Main Advantage: Small investment required to start manufacturing
VST Application Method for Laminated Glass
•
A narrow strip of clear V.S.T is applied around the edge of a sheet of glass.
6mm (1/4 in) is normally the width of the tape. Two sheets of glass are bonded
together leaving a small gap.
•
The gap allows for the resin to be injected and the air between the sheets of
glass to escape.
•
The thickness of the tape used determines the overall thickness of the glass
laminate, the overall thickness of the resin and the amount of resin used.
•
The tape acts as a seal and as a dam as the resin is injected. Different resins
have different curing systems.
VST Glass Manufacturing Advantages
•
V.S.T. Provides a Perfect Seal - Resins can sometimes shrink drawing
air through the tape bond giving bubbles in the resin.
•
High Adhesion Level of V.S.T. - Reduces blow-outs where the resin
pressure undermines the tape bond, which results in the materials used in
the manufacturing process to be wasted.
•
No Trimming of Glass - Reducing wastage of materials and giving a
reduction in manufacturing time.