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Tough nylon easily colorable


It?s the proverbial material Catch-22: you need more toughness than conventional nylon 6 can deliver, but you don?t quite need the properties and price of an impact-modified nylon 66. You either go with this choice, or end up choosing an impact-modified nylon 6, for which the trade-off is limited colorability and higher cost.

Now, you can try option three. Clariant Masterbatches Specialty Compounding (Millington, MD) recently introduced a line of toughened nylon 6 compounds that are said to bridge the gap. ?These new nylon 6 compounds have properties that are similar to impact-modified nylon 66, but they offer all the benefits of nylon 6 in the molded part,? explains Bill Blasius, North American technology director, Clariant Masterbatches.

Property data for unfilled versions include a notched Izod impact of 16 ft-lb/in (several times higher than standard modified nylon 6), tensile strength of 7000 psi, flexural modulus of 280,000 psi, and flexural strength of 11,000 psi. Typical processing temperatures are 470-530°F, similar to standard unmodified nylon 6. The compounds can also be produced with glass or mineral reinforcement, and with additives for FR, UV, and wear.

Targeted applications include lawn and garden, power tools, furniture, sporting goods, electrical products, and interior auto components. ?A lot of these applications require more toughness than conventional nylon 6 can deliver,? adds Blasius, ?but impact-modified nylon 66 is really overengineered and overpriced for almost anything except high-temperature applications like under-the-hood automotive parts.? Clariant?s new nylon 6 compounds have substantially lower viscosity than toughened 66 resins, according to Blasius, so they can be processed through pin gates and can readily fill thin-walled sections with good surface finish.

Colorability is improved through a proprietary additive combination that makes the compounds more receptive to color. Because the material has a lower melt temperature than toughened nylon 66, colors that would degrade at higher processing temperatures can be used.?MM

Clariant Masterbatches
(410) 928-3083
www.clariant.masterbatches.com

IMM - March 2006
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