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  • Why Rubber Tubing Tolerances may be Different than Plastic/Rigid Tubing Tolerances
    Even though manufacturing tolerances of rubber tubing are wider than plastic/rigid tubing, rubber can provide product solutions not available in plastic or metal. "Manufacturing Tolerance" is defined as the difference between the upper and lower limit dimensions of the part. It is usually expressed
  • Plastics Consultancy Network - Profile and sheet extrusion
    and colours. The hardness of PVC can vary from the rigid type used for windows (Shore A hardness of 100 or British Standard softness of 0) to the plasticised or soft version used for garden hoses (generally Shore A 80 deg or BSS 38) and even down to very soft materials of Shore A 60 deg (BSS 75
  • Medical Device Link . Vinyl Usage in Medical Plastics: New Technologies
    units) typically varies between 500 and 1500, with number-average molecular weights (Mn) from 30,000 to 75,000. Figure 1. Structure of vinyl chloride monomer (VCM). Figure 2. Generalized structure of polyvinyl chloride (PVC). As a neat polymer, PVC is rigid, brittle, and thermally unstable
  • Effects of Chlorinated Water on Plastic-Based Water Delivery Systems (.pdf)
    plastic can be both viable. and reliable. A notable limitation of CPVC is that it is a rigid. Historical Background. system that requires solvent welding of fittings and joints. In the late 1960s, the plumbing industry began to use. Crosslinked polyethylene (PEX) is another viable choice. polyacetal resin
  • Medical Device Link .
    . In addition, he says, PVC grades run from flexible to firm, so it can be used to make tubes ranging from rubbery to rigid. Then there s bonding, which can be troublesome with some tubing materials. But not with PVC, which bonds like nothing else, Brooks notes. You have to bond a tube
  • Medical Device Link .
    inherent in medical devices have turned designers increasingly toward engineered resins. A thermoplastic’s properties depend on its chemistry, structure, chain length, and the bonds between chains. These plastics tend to be rigid and can have molecular structures that range from fully amorphous to those
  • Medical Device Link .
    . By selecting various materials or processes, manufacturers can give metal tubing distinct characteristics. For example, tubing made from cobalt alloys can be used in the production of rigid or stiff endoscopes for use in certain diagnostic procedures. But a more elastic material, such as nitinol, can be used
  • Medical Device Link .
    used in the microchannels and reservoirs. The adhesives are dimensionally stable, provide resistance to moisture and temperature, and are chemically compatible with electrophoretic separation. These clear adhesives can be either flexible or rigid, and can incorporate hydrophilic properties

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