Plastics data sheet

It is important for the designer to become familiar with all the information that is available for each plastic, especially that which is pertinent to the product design requirements. Designers, who are knowledgeable of the data derived from metal tests, could have a tendency to apply the plastic data sheet information in a manner similar to that used for metals. This could be understood because there is no warning that some of the data supplied by the manufacturer are applicable only when use and test conditions are nearly the same. 

Plastic material suppliers provide material data sheets for each grade they produce. At first glance, there could be a tendency to apply the plastic information in a similar fashion to that of other materials. If such a procedure were to be followed, the result would not only lead to disappointment but also perhaps even to failure for many products. The reason for the difference in treating the plastic data sheets from those of other materials is the behavior of plastics under load and under varying environmental conditions, which normally are not factors with other materials such as steel (Chapter 2). 

K-Mac Plastics. Data sheets. K-Mac Plastics 3821 Clay Ave. SW, Wyoming, MI 49548... 

When processed and used according to manufacturer s recommendations, acetal resins present no extraordinary health risks. Before the use of any plastic material, including acetal, the Material Safety Data Sheet (MSDS) appHcable to the grade in question should be consulted. 

A.crolein, Material Safety Data Sheet, Union Carbide Chemicals and Plastics Company Inc., Specialty Chemicals Division, August 15,1989. 

Vjdyne Engineering Plastic Composite Data Sheet, 6313-E, Monsanto Co., St. Louis, Mo. 

Quahty control testing of siUcones utilizes a combination of physical and chemical measurements to ensure satisfactory product performance and processibihty. Eor example, in addition to the usual physical properties of cured elastomers, the plasticity of heat-cured mbber and the extmsion rate of TVR elastomers under standard conditions are important to the customer. Where the siUcone appHcation involves surface activity, a use test is frequently the only rehable indicator of performance. Eor example, the performance of an antifoaming agent can be tested by measuring the foam reduction when the sihcone emulsion is added to an agitated standard detergent solution. The product data sheets and technical bulletins from commercial siUcone producers can be consulted for more information. 

The application of appropriate data to product design can mean the difference between the success and failure of manufactured products made from any material (plastic, steel, etc.). There are different sources of information on plastics. There is the data sheet compiled by a manufacturer of the material and derived from tests conducted in accordance with standardized specifications. Another source is the description of outstanding characteristics of each plastic, along with the listing of typical applications. 

Design problems with the other conventional materials of construction are usually solved with the aid of textbooks or handbooks that refer the reader to data sheets where the characteristics of a specific material are listed. However, products designed with plastics involve some special considerations when using these textbooks or handbooks as reviewed in Chapter 2. 

The reaction of plastics under test conditions to their behaviors is explained in other Chapters, particularly Chapters 2,5 to 7. Until this phase of the information is properly understood, it is best not to apply the numbers from the data sheet, for they can be a source of misinterpreted information. A con-... 

The yield point is the first point on the stress-strain curve at which an increase in strain occurs without an increase in stress. The stress at which a material exhibits a special limiting deviation from the proportionality of stress-to-strain is the yield strength. A material whose stress-strain curve exhibits points of zero slope may be considered to have a yield point such as described in Fig. 2-11. The data sheets usually omit the yield strength when there is a zero slope point on the stress-strain curve in the yield region. In reinforced plastic materials, the values of the yield strength and the tensile strength are very close to each other. 

When use conditions differ from those applied to data sheet tests, certain comparative evaluation can be made. Selecting an established high impact plastic such as polycarbonate as the standard, a tensile test would be made on this material at use speeds of strik-... 

FreeMDS http //www.freemds.cora FreeMDS from IDES (http //www.idesinc. com/Products l.htm) is a no-charge service that provides Plastic Material Data Sheets. This growing database contains over 35,000 Material Data Sheets from North America, Europe, and the Pacific Rim. 

The monomers, catalysts or hardeners, or plasticizers can include chemicals with the potential to irritate the skin, mucous membranes or respiratory tract. Some can promote skin or respiratory sensitization. The range of chemicals in use is extremely wide, so that reference should be made to the Materials Safety Data Sheet for each specific formulation or variation of it identifiable by reference to the supplier s proprietary name and code number. Some common resin types are summarized in Table 5.55. 

Rapra have published their own chemical resistance data sheets [9, 10], based on results of tests at Rapra performed by a small team of operators. They are thus comparable one with another and their sources are known. Rapra s Plascams materials selection database provides durability properties on a ranking basis and their Plastics Design Guide includes Plascams and other useful programmes. In 2002 Rapra and Faraday Plastics have launched a new website of environmental stress cracking data (www.esc-plastics.com). 

Chemical Resistance Data Sheets, Volume One Plastics, Rapra Technology Limited, 1993. 

Eastman Chemical Co. (2000) Product Data Sheet Eastman DOA Plasticizer (Bis(2-ethylhexyl)adipate), Kingsport, TN... 

Health and Safety Issues. Polyesterether elastomers derived from dimethyl terephthalate, butanediol, and Ptmeg are not hazardous according to the published Materials Safety Data Sheets (MSDS) for this elastomer. Polymers of a similar structure containing isophthalic acid are also not considered hazardous. For other copolymer elastomers, the MSDS put out by suppliers should be consulted by potential users before evaluation. One environmental advantage of thermoplastic elastomers of this type is that they are melt-reprocessible and thus scrap and off-specification material and even obselete parts can be easily recycled. Up to 25% by weight of recycled material can be incorporated (see Recycling, plastics). 

On-line inspection is a form of testing and in this context dimensional measurements are those most often made. Apart from gauges, micrometers and so on, there are various optical, electrical, nuclear and other methods which may have advantages in production circumstances. Descriptions of the use of such techniques can be found in the literature and in manufacturers data sheets. Some fairly recent examples relating to rubber and plastics products are given in references 12 - 16. However, the various techniques will not be reviewed here. 

Data sheets on the solvent resistance of various plastics and rubbers are available from the primary manufacturers. In addition, a number of O-ring manufacturers publish information on the solvent and chemical resistance of elastomers used in O-rings. For example, the Parker Seal Company, 17325 Euclid Ave., Cleveland, OH, publishes a Seal Compound Manuui which contains this information. 

In this test, a small sample of material (127 mm x 13 mm, or 5 in. x 0.5 in.) is exposed vertically to a small Bunsen burner-type flame from underneath (in the UL 94 V test) and the results show a rating, ranging from V-0 (best), through V-l, V-2 to B (for Burn). Materials with a B rating on the UL 94 Vertical test can also be tested in the less severe UL 94 HB (for horizontal burning), where the assessment is whether a flame spread rate of 4in./min is achieved. It is the most widely used fire-test specification for plastic materials, especially fire-retarded ones, and forms the basis of the famous Yellow Card used by ULs to list the plastic materials. The results from these tests are almost invariably found in a variety of specifications and data sheets. 

Specific information Oh all machine sellings and plastic properties is initially acquired by using the resin supplier s data sheet on the particular compound or resin to be used. 

Visit your traps once per day. This can be done anytime during the day. Most convenient for the investigator will be the middle of the day. At each check, empty each trap s content into a plastic bag. Identify fish. Record species and numbers of fish of each species on Data Sheet 2.1. Release fish into water. Return trap to its place in water. 

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