Polyurethane vs nylon tubing
[DOC File]Biocompatibility of Materials
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Plasticizers cause tubing to become softer, allowing for chains to slide over each other. Somewhat volatile and can come out of the tubing to contaminated systems. Silicon gel. Lots of physiological interactions with injection. Metals. Corrosion. Cr+n, Co+2, Fe+2,+3, Ti+2. Too much breakup can cause tissue poisoning and necrosis
[DOC File]DIVISION 25 SPECIFICATIONS AND GUIDELINES
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Black polyurethane finish. 15” deep base with four (4) ¾” bolt down holes. ... Fittings for electrical metallic tubing shall be single screw indenter fittings for conduits up to 2" and double screw indenter fittings for conduits 2" and larger. ... Leave a tagged nylon pull tape in each raceway (including raceways in use). Bush ends of all ...
[DOC File]IDENTIFICATION OF A POLYMER
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Tents and screens are usually nylon. Floating rope is usually polypropylene. Foam upholstery cushions are usually polyurethanes. Bulletproof glass, sunglasses and reading glasses with plastic lenses are polycarbonate. Feel: Teflon and polyethylene feel waxy. Thermosets feel hard and sound brittle when dropped or struck with a metallic object.
[DOC File]History of Natural and Synthetic Polymers
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Nylon is Dupont’s trade name for aliphatic polyamides. Aramid is a generic term for fully aromatic polyamides Nylon 1 has one C in the main chain of its mer (repeating unit). Nylon 2 has two C’s in the main chain of its mer. Nylon 3 has three C’s in the main chain of its mer, etc. 3-methyl-3-aminobutanoic acid lactam (-methyl-(-butyrolactam
[DOC File]Design of an Embolic Protection Filter for Carotid Artery ...
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The FilterWire EX (see Fig. 1) polyurethane filter has one of the largest filter volumes (15 mm long), allowing it to capture more embolic particles. The 110µm-pore filter bag is aligned at an angle to the vessel wall. The main benefits of this simple design are its filter volume and large proximal opening.
[DOCX File]Custom Fan Wall Air Handling Units - University of Houston
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Jan 29, 2018 · Insulate the under side of the entire drain pan with two part sprayed on polyurethane closed cell foam with a minimum of R-14 insulation value. Insulation shall be water impervious rigid type, after curing, and shall occupy all voids and areas between drain pan and outer wall to prevent the occurrence of trapped water, condensation, and ...
[DOC File]Go Green Handouts - InteriorDesign-ED
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But polyurethane off-gasses harmful Volatile Organic Compounds (VOC’s, and doesn’t decompose, so it will stay on this earth forever. In 1932 plastic screws were patented for use in extrusion & injection molding . In 1933 the first industrially practical polyethylene synthesis was discovered.
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