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CAPILLARY CEMENTING ACRYLIC
SHEET CAPILLARY CEMENTING Capillary cementing uses a syringe to apply
clear cement to a joint. The edge cut is very critical in this
application. Depending on the application, the viscosity of the
cemant can be adjusted by dissolving some acrylic sheet or resin
into the cement. Capillary cementing is probably the most
popular way of joining CHEMCAST® GP acrylic sheet. It works
because of the ability of lowviscosity solventtype cement to
flow through a joint area by capillary action. Properly done,
capillary cementing yields a strong, transparent joint. Solvent cements are available from CHEMCAST®
GP acrylic sheet distributors. They can recommend the best ones
for your projects. To capillary cement, first make sure all parts
fit together properly. Then, join the pieces together with
masking tape or clamp them into a form that will support the
pieces and hold them firmly in place. When solvent cementing CHEMCAST® GP acrylic
sheet 1/4" or thicker, keep the joint in the horizontal
plane and space the two edges with .004 inch shims. Insert shims
every two feet for long edges. Let the cement soak into the edges 4560
seconds before removing the shims. At this point, the surfaces
will be soft. Apply a small pressure of about 0.7 to 1 .4
Ib./sq.in. (50100 grams/sq.cm) for three minutes, until the
joint is set. If the cement does not flow completely into the
joint, tilt the vertical piece very slightly (about 1 ) toward
the outside. This should allow the solvent to flow freely into
the entire joint. then, tilt the piece back again for a square
corner. The initial bond forms in five to ten seconds.
Wait three hours before doing subsequent processing. High
strength is reached in 2448 hours. Strength will continue to
build for several weeks. |
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Copyright © Plastiglas de Mexico 1999
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