Type of plastic material pdf

Pvc type 1 typical properties plastic sheets, plastic. Smart plastics guide plastic products are typically labeled with a number surrounded by the recycling symbol. A resin is judged by any number of criteria strength, toughness, aesthetics, etc. Thermoplastic elastomers tpe, sometimes referred to as thermoplastic rubbers, are a class of copolymers or a physical mix of polymers usually a plastic and a rubber that consist of materials with both thermoplastic and elastomeric properties. The density of a plastic sample may change due to change in crystallinity, loss of plasticizers, absorption of solvent, etc. It is extremely important to pick the right material for the right product application, taking into consideration usage, environment conditions, type of abrasion, and even overall user experience. An overview of the plastic material selection process for medical devices february 20 the d. Plastic, polymeric material that has the capability of being molded or shaped. An overview of the plastic material selection process for medical devices. Code 7 is used to designate miscellaneous types of. Also, you may want to use our plastic material selection guide or interactive thermoplastics triangle to assist with the material selection process based on your application requirements.

Many complex plastic compounds require a rigorous spectral or destructive chemical analysis for a positive identification. This type of plastic is strong and can usually withstand higher temperatures. This quiz is comprised of multiplechoice questions designed to test your level of understanding of the material covered in the continuing education article, frame materials. S flexible packaging market by material plastic film. Typical reactions for chain assembling are polyaddition continuous or step wise and condensation polymerization polycondensation 1 figure 1.

These two definitions of true strain are equivalent in the plastic range where the material volume can be considered constant during deformation as shown below. Acrylics are available in a range of colours and can be opaque, translucent or transparent. This manual is designed to help you the design engineer, product. Manufacturers utilize a variety of different plastic materials and compounds that each possess unique properties. Both types of plastic materials are recyclable and it is possible to produce bio degradable plastics with both types of feedstocks. Associated with the different types of resin are potential health risks. This paper presents an overview of the plastic material selection process, with specific emphasis on the unique requirements of. The two principle types extruded and cast have similar properties, but extruded sheet can be vacuum formed whereas cast sheet can be pressed. The society of the plastics industry spi established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. Plastic marked with an spi code of 6 is made with polystyrene.

Just like other forms of plastic molding, after the molten plastic is injected into the mold, the mold is cooled and opened to reveal a solid plastic part. Although the information and statements herein are believed to be accurate, no guarantee of their accuracy is made. To initially determine whether a material is thermoset or thermoplastic, heat a stirring rod to about 5000f2600c, the material is a thermoplastic. There are two type of acrylic extruded which is cheaper and very plastic and cast which machines better but is harder and less flexible.

Definitions of plastic material types adapted from the. This information will help you sort plastic materials more effectively for recycling. Plastic material is a term that refers to a large class of polymers, separated into various groups and subgroups. Polystyrene is commonly recycled, but is difficult to do. Polymethylmethacrylate pmma plastic sheet it is a versatile material. Fillers are an extremely diverse group of materials. S flexible packaging market by material plastic film, aluminium foil, paper, bioplastic, type standup pouches, retort pouches, gusseted bags, others.

The ultimate objective of a failure analysis is to ascertain the mode and the cause of the failure, regardless of the material from which the part was fabricated. Thermoplastic polymers are represented by a large range of plastic materials. A buildup of charges due to dry skin rubbing on clothes. Both types of plastic materials are recyclable and it is possible to produce biodegradable plastics with both types of feedstocks. A material that can burn is described as flammable. The properties of thermosetting plastic material are as follows. The seventh edition of this classic reference work once more provides a comprehensive overview of commercially available plastics materials. Therefore, to determine the exact density of plastic, it is. Caused by the macromolecular structure and the temperature dependent physical properties plastic materials are distinguished into different. Plastics are essential materials of modern day life. Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from ps. Types ofmaterial used in food packaging material use appearance i properties temperature cost toler. Variations may occur as far as cases and technical parts are concerned. This property of plasticity, often found in combination with other special properties such as low density, low electrical conductivity, transparency, and toughness, allows plastics to be made into a great variety of products.

Each type of filler lends a unique property set to the host polymer. What is a major cause of getting static electricity shocks. Characterization of plastics in failure analysis jeffrey a. The most common takeout packaging usually made in black or very rigid, crackresistant,leak preferred material moderately priced. A simple guide to plastic molding processes, best uses. The plastic and packaging material used by okw are on the whole harmless and, apart from some exceptions, can easily be recycled and reutilized. Plastic material properties table mechanical, physical. Such a material iselastic accordingtothedescription ofelasticity given earlier immediate response,fullrecovery, andit is also linear in its relation between stress and strain or equivalently, force and deformation. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. The main characteristics or the properties which determine a plastics processability are molecular weight, uniformity, additive type, content and plastic feed rates.

Material type acronym pet hdpe lope eps other plastic identification code full polymer names po,hyetnylene terepntnalate high density polyethylene potpinyl chloride unplasticised. For chemically resistant plastic, view our chemical resistance of plastics chart. Injection molding is the process of making custom plastic parts by injecting molten plastic material at high pressure into a metal mold. It is calculated by dividing the mass of the material by the volume and is normally expressed in gcm 3. Greene, csu 7 medical plastics and composites use containers bottles, bags drug delivery iv bags, syringes tubing and tools for surgery implants, artificial skins the use of plastic materials in the medical field, about. These numbers and labels identify both the type of resin used to make the plastic and the products recyclability. Since the previous edition, several new materials have been. See a full breakdown of each kind of plastic, along with its. If you wear a cap and are having problems with static cling, what type of material would be your. The plastic properties on pages 222223 are exclusively applicable for the specified standard test pieces. Engineering plastics are a group of plastic materials that have better mechanical andor thermal properties than the more widely used commodity plastics such as polystyrene, pvc, polypropylene and polyethylene being more expensive, engineering plastics are produced in lower quantities and tend to be used for smaller objects or lowvolume applications such as mechanical parts, rather than.

While most elastomers are thermosets, thermoplastics are in contrast relatively easy to use in manufacturing, for example, by injection molding. Pvc type 1 typical properties property units value 1 astm method physical properties density gcm3 1. Any particular plastics performance across these criteria can vary widely. Before starting the chapter on the uses and subsequent recycling of plastic, let us establish a general classification of these thermosetting resins or thermoplastics the two big groups into which we include elastomers by detailing their properties, their makeup, their.

The investigation is performed in generally the same manner, whether the failed component was. Thats why youre able to reheat your leftovers in tupperware without worrying about it melting. Frame materials you must be an aoa associate member and answer seven of ten questions successfully to receive one hour of continuing education credit. A plastic with good processability possesses the properties necessary to make it easy to process the plastics into desired shapes. An overview of the plastic material selection process for.

Caused by the macromolecular structure and the temperaturedependent physical properties plastic materials are distinguished into different. Within manufacturing technology there is a very high degree. Some of them are reusable, the others produce hazardous material after several uses. Bridging the gap between theory and practice, it enables scientists to understand the commercial implications of their work as well as providing technologists with a theoretical background. They are available in sheet, rod, and tube for use in injection moulding, extrusion and vacuum forming. Any particulate material added to a plastic will behave like a filler. It is available in the form of liquid at room temperature.