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Zytel
Zytel is a trademark owned by DuPont and used for a number of different high strength, abrasion and impact resistant thermoplastic polyamide formulations of the family more commonly known as nylon. The Zytel product line is based mostly on nylon 66, but also includes grades based on nylon 6 as a matrix, long chain nylons such as nylon 610 (if based on at least one renewable monomer they are branded Zytel RS), and copolymers including a transparent resin called Zytel 330. Resins based on polyphthalamides are branded 'Zytel HTN'. The Zytel product range takes advantage of the fact that nylons are one of the most compatible polymers with modifiers and so offers grades with varying degrees of fiberglass, from 13% to 60%, (to increase stiffness and strength), rubber toughened resins, flame retarded grades. Nylon resins with mineral reinforcement are branded 'Minlon'. Properties The properties of Zytel will vary with the specific formulation. Formulation Zytel HTN 35% Glass Rei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nylon
Nylon is a generic designation for a family of synthetic polymers composed of polyamides ( repeating units linked by amide links).The polyamides may be aliphatic or semi-aromatic. Nylon is a silk-like thermoplastic, generally made from petroleum, that can be melt-processed into fibers, films, or shapes. Nylon polymers can be mixed with a wide variety of additives to achieve many property variations. Nylon polymers have found significant commercial applications in fabric and fibers (apparel, flooring and rubber reinforcement), in shapes (molded parts for cars, electrical equipment, etc.), and in films (mostly for food packaging). History DuPont and the invention of nylon Researchers at DuPont began developing cellulose based fibers, culminating in the synthetic fiber rayon. DuPont's experience with rayon was an important precursor to its development and marketing of nylon. DuPont's invention of nylon spanned an eleven-year period, ranging from the initial resear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyphthalamide
Polyphthalamide (aka. PPA, High Performance Polyamide) is a subset of thermoplastic synthetic resins in the polyamide (nylon) family defined as when 55% or more moles of the carboxylic acid portion of the repeating unit in the polymer chain is composed of a combination of terephthalic (TPA) and isophthalic (IPA) acids. The substitution of aliphatic diacids by aromatic diacids in the polymer backbone increases the melting point, glass transition temperature, chemical resistance and stiffness. PPA based resins are molded into parts to replace metals in applications requiring high temperature resistance such as automotive powertrain components, the housing for high temperature electrical connectors and many other uses. Structure The diamines in PPAs are aliphatic. PA6T homopolymer melts at 371 °C, which renders it intractable. To make usable polymers, it is necessary to lower the melting point, which can be achieved practically using either a longer diamine (with 9-12 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nylon 66
Nylon 66 (loosely written nylon 6-6, nylon 6/6, nylon 6,6, or nylon 6:6) is a type of polyamide or nylon. It, and nylon 6, are the two most common for textile and plastic industries. Nylon 66 is made of two monomers each containing 6 carbon atoms, hexamethylenediamine and adipic acid, which give nylon 66 its name. Aside from its superior physical characteristics, nylon 66 is attractive because its precursors are inexpensive. Synthesis and manufacturing Hexamethylenediamine (top) and adipic acid (bottom), monomers used for polycondensation of Nylon 66. Nylon 66 is synthesized by polycondensation of hexamethylenediamine and adipic acid. Equivalent amounts of hexamethylenediamine and adipic acid are combined in water. In the original implementation, the resulting ammonium/ carboxylate salt was isolated and then heated either in batches or continuously to induce polycondensation.n(HOOC - (CH2)4 - COOH) + n(H2N - (CH2)6 - NH2) -> OC - (CH2)4 - CO - NH - (CH2)6 - NH - n + (2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DuPont
DuPont de Nemours, Inc., commonly shortened to DuPont, is an American multinational chemical company first formed in 1802 by French-American chemist and industrialist Éleuthère Irénée du Pont de Nemours. The company played a major role in the development of Delaware and first arose as a major supplier of gunpowder. DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kapton, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona, Corfam and Lycra in the 20th century, and its scientists developed many chemicals, most notably Freon (chlorofluorocarbons), for the refrigerant industry. It also developed synthetic pigments and paints including ChromaFlair. In 2015, DuPont and the Dow Chemical Company agreed to a reorganization plan in which the two companies would merge and split into three. As a merged entity, DuPont simultaneously acquired Dow and renamed itself to DowDuPont on August 31, 2017, and after 18 months spin off the merged en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyamide
A polyamide is a polymer with repeating units linked by amide bonds. Polyamides occur both naturally and artificially. Examples of naturally occurring polyamides are proteins, such as wool and silk. Artificially made polyamides can be made through step-growth polymerization or solid-phase synthesis yielding materials such as nylons, aramids, and sodium polyaspartate. Synthetic polyamides are commonly used in textiles, automotive industry, carpets, kitchen utensils and sportswear due to their high durability and strength. The transportation manufacturing industry is the major consumer, accounting for 35% of polyamide (PA) consumption. Classification Polymers of amino acids are known as polypeptides or proteins. According to the composition of their main chain, synthetic polyamides are classified as follows: All polyamides are made by the formation of an amide function to link two molecules of monomer together. The monomers can be amides themselves (usually in the form of a c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Johnson (athlete)
Michael Duane Johnson (born September 13, 1967) is an American retired sprinter who won four Olympic gold medals and 8 World Championships gold medals in the span of his career. He formerly held the world and Olympic records in the 200 m and 400 m, as well as the world record in the indoor 400 m. He also once held the world's best time in the 300 m. Johnson is generally considered one of the greatest and most consistent sprinters in the history of track and field. Johnson is the only male athlete in history to win both the 200 meters and 400 meters events at the same Olympics, a feat he accomplished at the 1996 Summer Olympics in Atlanta. Johnson is also the only man to successfully defend his Olympic title in the 400 m, having done so at the 2000 Summer Olympics in Sydney. Aside from his Olympic success, Johnson accumulated eight gold medals at the World Championships and is tied with Carl Lewis for the fourth most gold medals won by a runner. Johnson's distinctive stiff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grohmann Knives
Grohman and Grohmann are surnames, and may refer to: People * Henryk Grohman (1862–1939), Polish industrialist * William Adolf Baillie Grohman (1851–1921), an author and pioneer in British Columbia * Claudia Grohmann (born 2002), "Queen of Germany" (see Miss Germany) * Jorge Basadre Grohmann (1903–1980), Peruvian historian * Patricia Grohmann (born 1990), German volleyballer * Paul Grohmann (1848–1908), Austrian mountaineer * Tim Grohmann (born 1988), German rower * Will Grohmann (1887–1968), German art critic Other uses * Grohman Narrows Provincial Park, a provincial park in British Columbia, Canada * Grohmann Knives, a Canadian knife company; see Zytel * Grohmann Museum, Milwaukee, Wisconsin, United States * Jorge Basadre Grohmann National University, Tacna, Peru * Tesla Grohmann Automation GmbH, German engineering company See also * Grohmannspitze (Grohmann Peak) a mountain in Italy * Baillie-Grohman Canal, a canal in British Columbia, Canada {{disambiguation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knife
A knife ( : knives; from Old Norse 'knife, dirk') is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone (such as flint and obsidian), over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin. Knives can serve various purposes. Hunters use a hunting knife, soldiers use the combat knife, scouts, campers, and hikers carry a pocket knife; there are kitchen knives for preparing foods (the chef's knife, the paring knife, bread knife, cleaver), table knives (butter knives and steak knives), weapons ( daggers or switchblades), knives for throwing or juggl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smith & Wesson
Smith & Wesson Brands, Inc. (S&W) is an American firearm manufacturer headquartered in Springfield, Massachusetts, United States. Smith & Wesson was founded by Horace Smith and Daniel B. Wesson as the "Smith & Wesson Revolver Company" in 1856 after their previous company, also called the "Smith & Wesson Company" and later renamed as " Volcanic Repeating Arms", was sold to Oliver Winchester and became the Winchester Repeating Arms Company. The modern Smith & Wesson had been previously owned by Bangor Punta and Tomkins plc before being acquired by Saf-T-Hammer Corporation in 2001. Smith & Wesson was a unit of American Outdoor Brands Corporation from 2016 to 2020 until the company was spun out in 2020. On September 30, 2021, Smith & Wesson announced plans to move its headquarters to Maryville, Tennessee in 2023, citing an unfavorable business environment in Massachusetts. History Volcanic Repeating Arms Horace Smith and Daniel B. Wesson founded the Smith & Wesson Company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benchmade
The Benchmade Knife Company is an American knife manufacturer in Oregon City, Oregon. History Benchmade originally started in California in 1979 as Bali-Song, then changed their name to Pacific Cutlery Corporation in the early 1980s. The company changed their name to "Benchmade" in 1988. In 1990 the company moved to Clackamas, Oregon. In 1996, the company moved to a 144,000 square foot facility in Oregon City, Oregon. Benchmade became known primarily as a manufacturer of butterfly knives, or balisongs, and they continue to be manufactured under their registered trademark name "Bali-Song". Benchmade's original Bali-Song design by Jody Samson was awarded '' Blade Magazine's'' Knife of the Year Award in 1979. Founder Les De Asis died February 21, 2020 following a stroke. Roberta De Asis held the position of President and CEO following his death and was succeeded by her son Jon in October 2020. Headquarters location In 1996, Benchmade moved to Oregon City. Apart from some ''Red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leatherman
Leatherman is an American brand of multitools and knives made by Leatherman Tool Group of Portland, Oregon. The company was founded in July 1983 by Timothy S. Leatherman and Steve Berliner in order to market his idea of a capable, easily portable hand tool with multiple functions. That same year, Leatherman sold the first multitool, which was called the PST (Pocket Survival Tool). Company history Timothy S. Leatherman, a 1970 mechanical engineering graduate of Oregon State University, and his business partner, Steve Berliner, formed Leatherman Tool Group in 1983. Leatherman was inspired to design a "Boy Scout knife with pliers" while he and his wife traveled Europe and the Middle East in 1975, often attempting to use a simple pocketknife to repair both their aged and repeatedly malfunctioning Italian Fiat 600 car (bought in Amsterdam for $300) and leaky hotel plumbing. He spent several years perfecting the "Mr. Crunch" prototype and received his first U.S. patent ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold Steel (company)
Cold Steel, Inc. is an American retailer of knives/ bladed tools, training weapons, swords and other martial arts edged and blunt weapons. Founded in Ventura, California, the company is currently based in Irving, Texas after an acquisition by GSM Outdoors in 2020. Cold Steel products are manufactured worldwide, including in the United States, Japan, mainland China, Taiwan, India, Italy and South Africa. Products The company's products include fixed blade knives, folding knives, swords, machetes, tomahawks, kukris, blowguns, walking sticks, and other martial arts items and training equipment. Their knives are used by military and law-enforcement personnel worldwide. Cold Steel is credited with popularizing the American tantō in 1980. Cold Steel marketed knives made for them in the U.S. by Camillus using a carbon steel given the trademarked name "Carbon V" (read "carbon five"). Their imported knives were nearly all made in Seki, Japan using AUS-8 which Cold Steel labelle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
