PEEK Screws and other Hardware

Posted by Barbara Gerard on 03.31.2017

PEEK or Polyether Ether Ketone is a colorless organic polymer in the polyaryletherketone (PAEK) family.  There are a number of grades currently available.  Unfilled PEEK is not reinforced with glass or carbon but is one of the strongest unfilled polymers.  PEEK 30% glass filled offers the same chemical resistance as unfilled PEEK but offers nearly double the tensile strength.  Peek is also offered in a 30% carbon-filled grade.  The carbon fibers enhance the strength and stiffness of the material.  This grade of PEEK offers optimum wear as well as excellent load carrying capacity.   PEEK 30% carbon filled offers 3 1/2 times higher thermal capacity than unfilled PEEK. There is also a bearing grade PEEK, called KetronTM HPV.

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Creep in Plastic Materials

Posted by Barbara Gerard on 12.12.2016

Creep is the tendency of a solid material to move slowly or deform permanently under a mechanical load. In material sciences, creep is sometimes referred to as cold flow. In this regard, the difference between plastics and other materials is that plastics display time-dependent viscoelastic behavior. Viscoelastic behavior is the property of a material to display both viscous and elastic characteristics when undergoing deformation. It can result from long-term exposure to high levels of stress that are still beneath the yield strength or yield point of the material. The yield strength or yield point of a material is the property defined as the stress at which that material begins to deform permanently. Deformation refers to any change in the shape of an object due to an applied force or a change in temperature. The first instance can be the result of tensile forces, sometimes called pulling forces, compressive forces (pushing forces), or shear, bending or torsion (twisting). Deformation is often described as “strain”. Prior to the yield point, the material will deform elastically and will return to its original shape when the applied stress is removed. Once the yield point is passed, some fraction of the deformation will be permanent and non-reversible.

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How Are Plastics Playing a Role at Tesla's Gigafactory?

Posted by Guest on 10.26.2016

Entrepreneur Elon Musk’s vision for mass produced, affordable electric vehicles has driven Tesla Motors to build the Gigafactory outside of Reno, Nevada. This approximately $5 billion factory is designed to manufacture the batteries needed to support mass produced electric vehicles. In order to realize this vision, plastics will be used throughout the factory both in the batteries and the machines used to produce them.  

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Metal Detectable Plastics in the Food Industry

Posted by Barbara Gerard on 10.10.2016

You are eating a hot dog or digging into a carton of your favorite ice cream. You don’t even think there could be a piece of plastic or metal or just small particles of these materials in there- broken or worn off from the machinery and tools used to get your favorite foods to your grocers’ shelves. But many of the food processing machines and tools used to provide food products have plastic parts in them or are made of plastics. For example, foods like melons, peaches, carrots, strawberries or apples can pick up plastic particulates from plastic tote bins or containers that are damaged or worn. Such foods as olives in a vat can mix with tiny particles from a plastic shovel or scraper as they wear. Metal parts from machinery can break off or wear and enter the food supply. So how can food processers know if there are plastics, metals or other foreign bodies in the foods they sell?

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Three Innovative Plastic Designs in Agriculture

Posted by Guest on 09.22.2016

Innovations in the agricultural industry are important for future generations and are enabling communities all over the world to meet the demand for food. Both in novel and technical ways, plastic designs are helping lead the way in agricultural innovation. Examples include rotomolded beehives beehives, injection molded spray nozzles, and plastic reservoir systems.

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Announcement: Craftech is Now PPAP Levels 1-5 Capable

Posted by Linda Jablanski on 09.10.2016

Craftech Industries, Inc. is pleased and proud to announce the added capability of quoting and producing parts with customer specified PPAP Level I, II, III, IV, and V paperwork.

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Plastic Materials Close Up: Polyoxymethylene (POM), Acetal, Delrin®, and Celcon®

Posted by Barbara Gerard on 08.30.2016

Polyoxymethylene (POM) is a thermoplastic materialalso known as acetal.  It is a molecule containing the functional group of carbon bonded to two –OR groups. POM was first discovered by German chemist Hermann Staudinger who won the 1953 Nobel Prize in Chemistry. He had studied it in the 1920s but found it to be thermally unstable. DuPont synthesized a version and filed for patent protection of the homopolymer crediting R.N. MacDonald as the inventor. This material had the same problem as Staudinger’s POM, in that it was also thermally unstable and therefore not useful commercially. A heat-stable POM homopolymer was finally discovered by Dal Nagore. He realized that by reacting the hemiacetal ends with acetic anhydride he could readily depolymerize hemiacetal into a thermally stable and melt processable thermoplastic. In 1960, Du Pont built a manufacturing plant to produce Delrin®, its version of the POM homopolymer, while in the same year Celanese completed its study of the copolymer and in 1962 started production of Celcon®. Other manufacturers followed with their own versions of these materials.

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Rubik’s Cube: How It’s Made and Solution Clues

Posted by Barbara Gerard on 08.22.2016

Emo Rubik, a professor at the University of Budapest in Hungary, designed the now famous Rubik’s Cube in the mid-1970’s. It is made up of 26 smaller cubes and has six faces, each made up of nine different colors: red, yellow, blue, white, green and orange. His intention in designing it was to demonstrate to his students three-dimensional relationships. When he showed the prototype to his students, it was an instant hit not so much as a teaching tool but as a game.

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How to Identify a Plastic Material Using the Burn Test

Posted by Barbara Gerard on 08.05.2016

So you have a plastic part and you need to know what it is made of but you have no idea what plastic it is. This can be a challenging task. Many plastics look and feel alike but we will take a closer look here at some of the ways using a burn test. Please note, this test should be done in an industrial setting and not at home since proper safety protocol must be observed. Burning plastics can give off toxic fumes and plastic drips are very hot.

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A Technical Look at Polymer Synthesis and Additives

Posted by Barbara Gerard on 07.25.2016

Originally, plastic resins were made from vegetable matter including cellulose from cotton, furfural from oat hulls, oils from seeds and various starch derivatives. Bakelite (phenol formaldehyde resin), one of the first plastics made from synthetic components, was developed by Belgian born chemist Leo Backeland in New York in 1907. Bakelite is made through an elimination reaction of phenol with formaldehyde. It was originally lused for its electrical non-conductivity and heat-resistant properties in electrical insulators, radio and telephone casings. As it has a pleasing appearance, it was also used to make consumer products such as jewelry. Today, however, most plastics are made from petrochemicals including natural gas.

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