Manufacturers use formaldehyde to manufacture formaldehyde resins and other downstream products such as acetal resins
, BDO, MDI, and pentaerythritol.
For the case of acetal resins, a specific test to measure formaldehyde emission is available as VDA 275 from the German Association of the Automotive Industry.
Much has been documented in literature and patents regarding reducing formaldehyde emissions from acetal resins through polymer processing and backbone stabilization.
a two-year-old compounder of engineering thermoplastics, has expanded its product range by becoming the North American distributor of Kocetal-brand acetal resins
produced by Kolon Chemical Co.
World production of formaldehyde is about 15 million metric tons, and this gas is used mainly in the production of phenolic, urea, melamine, and acetal resins
, which have wide use in the production of adhesives and binders in the wood, plastics, textiles, leather, and related industries (20,42).
It is also an objective of this paper to show how to determine the ideal melt temperature for each polymer from the rheology data, and correlate the effects of melt temperature and pressure variations in a metering screw on the rheological properties of nylon 66 and acetal resins.
Nylon 66 and acetal resins were extruded at various screw speeds.
The DuPont Performance Polymers business manufactures and sells Crastin[R] PBT and Rynite[R] PET thermoplastic polyester resins, Delrin[R] acetal resins
, Hytrel[R] thermoplastic polyester elastomers, DuPont[TM] ETPV engineering thermoplastic vulcanizates, Minlon[R] mineral reinforced nylon resins, Neoprene polychloroprene, Tynex[R] filaments, Vespel[R] parts and shapes, Kalrez[R] perfluoroelastomer parts, Vamac[R] ethylene acrylic elastomers (AEM), Viton[R] fluoroelastomers, Viton[R] FreeFlow[TM] processing aids, Zytel[R] nylon resins and Zytel[R] HTN high-performance polyamides.
Deirin "Decorating Solutions" overcome past limitations experienced in the decoration of acetals through the ability of its Deirin acetal resins to accept painting, printing, plating, foil stamping, and in-mold decoration, says DuPont.
Other new Delrin acetal resins make possible the injection molding of flat shapes and large parts without the warp problems associated with standard acetals.
Last year, the company increased its domestic Ultraform acetal resins capacity, and, in Europe, it has just finished expanding its Ultrason E polyethersufone (PES) capacity to meet pressing global market needs after a supplier withdrew its PES resins.
New products in the Delrin line of acetal resins include an improved series with homopolymer properties but copolymer-like processing advantages, better weld line strength, and a marked improvement in melt stability.