 SCIGRIP 3* is a water-thin, non-flammable cement formulated to quickly develop high strength, clear bonds to many thermoplastic
substrates, particularly acrylic. The bond is achieved by first softening the surfaces to be joined and then fusing them together with
dissipation of the solvent.
The initial bond forms within a few minutes and quickly increases in strength. Substantial strength will be obtained
within only a few hours. Under certain conditions, especially with high humidity, a white mark on the plastic (commonly called blushing)
may sometimes be encountered. Where a more blush resistant cement and longer open time is required, SCIGRIP 4 is recommended.
SUBSTRATE RECOMMENDATIONS
SCIGRIP® 3 is formulated for cementing acrylic (poly-methyl methacrylate) plastic to itself. It will also form strong bonds with other thermoplastics such
as polystyrene, CAB (cellulose acetate butyrate), PETG (polyethylene terephthalate glycol) and polycarbonate to themselves. It is not recommended
for cross-linked acrylic.
SUGGESTED BONDING APPLICATIONS AND RECOMMENDATIONS
SCIGRIP 3 is used extensively in sign fabrication. Strong butt joints are made with flat sheets by using the soak method for such applications as cementing
letters to acrylic panels. Butyrate trim-capping of acrylics is another highly recommended use for SCIGRIP 3. It is also widely used in the POP industry
(e.g. display), and in the fabrication and bonding of plastic containers, housewares, bottles and many other applications using the capillary method.
DIRECTIONS FOR USE
GENERAL: Surfaces to be joined must be clean, dry, and fit intimately without forcing. Apply cement with syringe, eyedropper or brush. Assemble while
parts are still wet. If cement is applied to one surface, let the two surfaces be in gentle contact for a few seconds to allow the cement to soften the
dry surfaces, then press parts together in firm contact. Initial bonds form very quickly. 65 – 80% of the ultimate bond strength will be obtained within
24 hours. Strength will continue to increase for several weeks.
CAPILLARY METHOD: Parts are placed lightly together and cement is applied to the edge of the joint with syringe or eyedropper. By capillary action,
the cement will flow a considerable distance, approximately 0.25 inch (0.64 cm), between two such surfaces. Allow a few seconds for the cement to
soften the surfaces. Press parts firmly together.
SOAK METHOD: Vertically dip surfaces until softened (approximately 2 to 5 minutes), then join pieces firmly together.
• In many cases, this cement dries too fast to apply by brush to the parts before they are joined.
• If crazing is a problem, we suggest you consider annealing before cementing. |
