Ads
related to: hi polymer vs vinyl eraser
Search results
Results From The WOW.Com Content Network
Vinyl erasers. High-quality plasticized vinyl or other "plastic" erasers, originally trademarked Mylar in the mid-20th century [citation needed], are softer, non-abrasive, and erase cleaner than standard rubber erasers. This is because the removed graphite does not remain on the eraser as much as rubber erasers, but is instead absorbed into the ...
Vinyl polymers are subject of several structural variations, which greatly expands the range of polymers and their applications. With the exception of polyethylene, vinyl polymers can arise from head-to-tail linking of monomers, head-to-head combined with tail-to-tail, or a mixture of those two patterns. Additionally the substituted carbon center in such polymers is stereogenic (a "chiral center")
Product lines include Sharp Kerry, Sharp P200 series, Graph 1000, Graphgear (500, 800 and 1000), Smash, Orenz, OrenzNero (mechanical pencils or "sharps"); Ain and Hi-Polymer (mechanical pencil leads, erasers); Energel (gel ink pens); Vicuña (hybrid ink ballpoint pen); Pentel Pen (permanent marker), and Sign Pen (fine tip marker).
In manufacturing processes by polycondensation a high purity of the starting materials is important. In addition, the stereochemistry plays a role in achieving the desired properties in general. The development of new high-performance plastics is therefore closely linked to the development and economic production of the constituent monomers. [2]
Because non-etching ink doesn't penetrate the surface of the film the way it penetrates paper, it is often possible to remove inked lines from drafting film when drawing on it by hand; an abrasive-free vinyl drafting eraser is the preferred tool for this, [3] although a scalpel works too. [4]
Ethylene vinyl alcohol (EVOH) is a formal copolymer of ethylene and vinyl alcohol. Because the latter monomer mainly exists as its tautomer acetaldehyde , the copolymer is prepared by polymerization of ethylene and vinyl acetate to give the ethylene vinyl acetate (EVA) copolymer followed by hydrolysis.