Glass finish

The valves are set in an aluminium overseal (which is frequently polished and anodised or lacquered) and clinched or rolled under an external bead on the glass finish. Finishes range from 13 to 20 mm. 

See Table 11.5. The application of a prethreaded cap relies on a torque usually measured as N m, to make a good impression between two surfaces. Ideally one material should be hard, e.g. glass, so that it bites into a resilient (soft) material such as composition cork. The sealing surface of a glass finish may be radial or flat, or in certain circumstances stepped or tapered. Thermoplastic closures are generally less dimensionally stable than metal closures. 

The ROPP closure has two torque measurements related to breaking the seal and the TE feature. Disadvantages can occur with the RO system where the glass finish is not up to standard, causing perforation of wad and difficulties in unscrewing. Reclosure is satisfactory provided the thread is fully formed, but shallow formed threads can be made to override due to the softer alloy metal. 

GCMI 430, Continuous thread pour out glass finish. 

GCMI 485, Combination CT and polyethylene sifter top snap cap glass finish. 

Products and Uses Used in boat and car repair products for fiber glass finishes. Precautions A fire hazard. Possible skin and eye irritant. 

Glass Finish. A material applied to the surface of a glass reinforcement to improve its effect upon the physical properties of the reinforced plastic. (Also bonding agent .)... 

Glass Finished product (Microscope Slides, Carl Roth GmbH, Germany) Glass... 

Outwater, J.O. and Murphy, M.C., The influences of environment and glass finishes on the fracture energy of glass-epoxy joints. In Proceedings of the 24th Annual Technical Conference, The Society of the Plastics Industry, 1%9, Paper 16-D. 

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