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PLEXIGLAS^® SHEET: SOLVENT CEMENTS

	Use methylene dichloride (MDC) as the basic cement.
	Add up to 10% diacetone alcohol to reduce blushing caused by the evaporation of solvent in humid conditions.
	Use the following solvent cement mixture for optimum joint appearance: 70% MDC, 20% MMA (methyl methacrylate inhibited monomer) and 10% GAA (glacial acetic acid).
	Store solvent cements in vapor-proof/corrosion-proof containers, such as glass or plastic-coated metal.
	Use only enough solvent to wet the joints, since excessive solvent will increase set times and possibly result in whitening or crazing.
	Do not flow or drip solvent on any flame polished, strip heated or dry-belt sanded surfaces.
	When soak cementing, limit soak time to approximately 45 seconds.
	The optimum edge finish is one which has been cut by a skim router (approximately .030" removal).
	Do not force fit parts to be cemented.

	The parts must be closely fitted with no visible gaps.
	The parts to be cemented should be unclamped or lightly clamped together.
	The cement is dispensed (from a hypodermic needle or eye dropper) along the joint.
	Capillary action draws the cement between the parts.
	Time for the joint to set varies from 2-5 minutes depending on the solvent used and temperature and humidity.
	Do not flow or drip solvent cement on a flame-polished, strip-heated or dry-belt sanded surface as these conditions show the maximum fabrication stress possible in plastic sheet.

	The parts must be closely fitted with no visible gaps.
	One of the parts is placed in a container holding the solvent cement until the edge softens into a cushion.
	When the parts are assembled, the cushion from the first forms a cushion on the second part by solvent action.
	Masking may be required near the edges to be cemented, to prevent excessive softening.
	The parts should be allowed to set for 24 hours before handling. Caution: Whitening in the joint and an increased chance of crazing may occur with the dip-soak method.

The statements, technical information and recommendations obtained herein are believed to be accurate as of the date hereof. Since the conditions and methods of use of the product and of the information referred to herein are beyond our control, Arkema expressly disclaims any and all liability. NO WARRANTY OF FITNESS FOR ANY PARTICULAR PURPOSE, WARRANTY OR MERCHANTABILITY, OR ANY OTHER WARRANTY, EXPRESS OR IMPLIED, IS MADE CONCERNING THE GOODS DESCRIBED OR THE INFORMATION PROVIDED HEREIN. The information provided herein relates only to the specific product designated and may not be applicable when such product is used in combination with other materials or in any process. The user should thoroughly test any application before commercialization. Nothing contained herein should be construed as an inducement to infringe any patent, and the user is advised to take appropriate steps to be sure that any proposed use of the product will not result in patent infringement.

See MSDS for Health and Safety Considerations.

© 2006 Arkema