PlasticsTechnology and Engineering

Modified Xyron PPE/PS and PPE/PA, Properties and charateristic

2010-12-01T14:57:00.000-08:00

Xyron modified from PPE, Xyron™ resins are engineering resins, composed of polyphenylene ether (PPE) modified by polystyrene (PS), polyamide (PA), or other polymeric materials. PS-modified Xyron™ has an amorphouse molecular structure that provides excellent heat resistance, dimensional stability, and mechanical properties. It also exhibits outstanding superiority in flame retardancy (free from

About Acrylonitrile butadiene styrene (ABS) Material

2008-10-11T16:38:00.000-07:00

Acrylonitrile butadiene styrene, or ABS, (chemical formula (C8H8· C4H6·C3H3N)n) is a common thermoplastic used to make light, rigid, molded products such as piping, plastic for electronics component, gear, automotive body parts, wheel covers, enclosures, protective head gear, toys, small appliance housings and power tools applications (hair dryers, blenders, food processors, lawnmowers, etc.ABS

Definition of Polymerization

2008-07-04T18:30:00.000-07:00

what does polymer mean?Polymer means many monomers. Sometimes polymers are also known as macromolecules or large-sized molecules. Usually, polymers are organic but not necessarilywe can what is monomer and polymer?monomerMonomers are molecules typically about 4-10 atoms in size, reactive in that they bond readily to other monomers in a process called polymerization. Polymers and their

Relationship between Linear and Volumetric Shrinkages

2008-06-20T08:44:00.000-07:00

Shrinkage is inherent in the injection molding process. Shrinkage occurs because the density of polymer varies from the processing temperature to the ambient temperatureThere are linear and volumetric shrinkages. Both methods are difficult to measure accurately.Volumetric shrinkageTo understand shrinkage it is first necessary to appreciate just how large the volumetric shrinkage of plastics

ASTM D 955 Standard Test Method for Measuring Shrinkage from Mold Dimensions of Thermoplastics

2008-06-12T08:14:00.000-07:00

This standard covers the measurement of specimen shrinkage for injection and compression molding. Data for mold shrinkage should be used for material comparison. Actual mold shrinkage values are highly dependant on part geometry, mold configuration, and processing conditions.Scope of test 1.1 This test method is intended to measure shrinkage from mold cavity to molded dimensions of

What Affect Part Shrinkage, and Cause of Shrinkage

2008-06-12T07:33:00.000-07:00

Instead of relating shrinkage to processing parameters, we consider some fundamental factors that affect shrinkage. These factors are volumetric, shrinkage, crystalline content, stress relaxation and orientation.Good Explanation relation between Plastic Shrinkage and Injection parameter we can read below. Plastic materials are injection-molded in a thick melt. The thickness of the melt varies

PLASTIC INJECTION MOLDING AND SHRINKAGE

2008-06-08T04:47:00.000-07:00

What is Shrinkage and Warpage of Plastic Mold shrinkage is the shrinkage of the polymer as it cools after the molding process. It is typically used to properly machine injection molds so that final part dimensions are as desired. Mold shrinkage can be Dependant upon the molding parameters used - often the extremes of the processing range for the material plus a midrange value are tested. we can

Polystyrene Specifications, Mechanical and Mold Properties

2008-02-18T05:57:00.000-08:00

Polystyrene (PS) is a thermoplastic with amorphous structure that is designed for applications requiring excellent electrical and mechanical properties together and strong. Polystyrenes in generally are transparent, but available in various colors.Now, polystyrene use in various application like household appliances, electrical parts, line printer parts, camera parts, rice cooker, refrigerator

Radical Polymerization of Polyethylene

2008-01-26T19:36:00.000-08:00

Polyethylene or polyethene is a thermoplastic commodity made by the chemical industry and probably the polymer you see most in daily life. Polyethylene is a polymer consisting of long chains of the monomer ethylene, see about introduction to polymer structure of polyethylene. Polyethylene is created through polymerization of ethene. It can be produced through 3 methods• radical polymerization, •

Introduction to Thermosetting plastic

2008-01-17T05:50:00.000-08:00

plastics divided in two large kinds, they are thermoplastic and thermosets, in general, thermoset materials are stronger than thermoplastic materials due to this 3-D network of bonds, thermosets materials can not be softened on heating. In thermosetting polymers, the polymer chains are joined (or cross-linked) by intermolecular bonding, cross linking is what makes thermosets special.as we know

Introduction to Polymer structure of Polyethylene

2007-12-19T19:19:00.000-08:00

Polyethylene is one kind of polymer that very popular plastic in the world, this kind of polymer usually makes shampoo bottles, soap bottles, tail lamps, inner panels, electrical and mechanical gear, children toys, grocery bags and little electrical parts components like in printer, vacuum cleaner and others , poly mean “ many” and mer is part, so we can easy define polymer as many parts and

Abbreviations and Acronyms of Various Plastic Material

2007-12-18T04:28:00.000-08:00

Plastics have various type, and each various type have they own name and they Abbreviations or Acronyms, here the list of Plastics material Abbreviationsor you should download the abbreviations hereABS = Acrylonitrile-butadiene-styreneABA = Acrylonitrile-butadiene-acrylateAES = Acrylonitrile-ethylene-styreneARP = Aromatic polyesterAS = Acrylonitrile-styreneCA = Cellulose acetateCMC

Laminated Polymer Structures

2007-09-18T13:10:00.000-07:00

A wide range of composite structures are prepared from polymer resins combined with fibers.for a more extensive discussion of polymer composites. Laminated polymer structures consist of layers of fibrous material impregnated with and bonded together usually by a thermosetting resin to produce sheets, bars, rods, tubes, etc. The laminate may be decorative or industrial,the latter being of

Thermoplastic Polymers

2007-03-04T05:15:00.001-08:00

Acetal and Polyacetal These combine very high strength, good temperature and abrasion resistance, exceptional dimensional stability, and low coefficient of thermal expansion. They compete with nylon (but with many better properties) and with metal die castings (but are lighter). Chemical resistance is good except for strong acids. Typical applications are water-pump parts, pipe fittings, washing

Polymer and plastic

2007-03-04T05:11:00.000-08:00

IntroductionPlastics are polymers. What is a polymer? The simplest definition of a polymer is something made of many units. Think of a polymer as a chain. Each link of the chain is the "mer" or basic unit that is made of carbon, hydrogen, oxygen, and/or silicon. To make the chain, many links or "mers" are hooked or polymerized together. Polymerization can be demonstrated by linking strips of

General characteristics and uses of plastic

2007-03-04T03:01:00.000-08:00

The structure, properties and uses of the materials deeply related to the injection molding are explained below so that the forming material will be understood wellThermosetting Plastic This type have Amorphous structure, During the irradiation of diamond by carbon atoms, amorphization of the crystal structure may occur and two specific amorphous forms of carbon may appear, he diamond like

Types of plastic

2007-03-03T09:07:00.000-08:00

The most plastic are made from petroleum, although natural gas and coal are used partly,Naphtha, naphtha is a group of various liquid hydrocarbon intermediate oil refining productsused primarily as feedstocks for producing a high octane gasoline component via the catalyticreforming process. Naphtha is also used in the petrochemical industry for producing olefins insteam crackers and in the

History Of Plastics

2007-03-03T08:30:00.000-08:00

The First PlasticThe first man-made plastic was created by Alexander Parkes who publicly demonstrated it at the 1862 Great International Exhibition in London. The material called Parkesine was an organic material derived from cellulose that once heated could be molded, and retained its shape when cooled.What plastic are ?Plastic covers a range of synthetic or semisynthetic polymerization products