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Plastic product failure

Ezrin M, Lavigne Q Helwig J, Plastic product failure due to design, material or process problems. National Manufacturing Week, Design for Manufacturability of Plastic Parts, Chicago 1999. [Pg.509]

Plasticizer failure can shorten the useful life of the plastic product. Failure can be either loss of plasticizer (it is fugitive ) or degradation of the plasticizer ( aging ). [Pg.346]

Figure 15-3. Breakdown of major reasons behind plastics product failures. (Reprinted with permission of RAPRA Technology Limited.)... Figure 15-3. Breakdown of major reasons behind plastics product failures. (Reprinted with permission of RAPRA Technology Limited.)...
Creep is a nonreversible deformation of material under load over time. Stress relaxation is a gradual decrease in stress with time under a constant deformation. Stated another way, creep is an increase in strain under constant stress, whereas stress relaxation is a decrease in stress under constant strain (17). Both of them play a key role in premature plastic product failures. As discussed earlier, designers often misunderstand or overlook... [Pg.356]

Plastics Product Failure, Cycle Time Tips, Vol. 11, Ashland, Inc., 2005. [Pg.383]

However, if suppliers data were to be applied without a complete analysis of the test data for each property, the result could prove costly and embarrassing. The nature of plastic materials is such that an oversight of even a small detail in its properties or the method by which they were derived could result in problems and product failure. [Pg.32]

Deformation or fracture. The failure of a plastic product in the performance of its normal long-time function is usually caused by... [Pg.81]

Failure can be considered as an actual rupture (stress-rupture) or an excessive creep deformation. Correlation of stress relaxation and creep data has been covered as well as a brief treatment of the equivalent elastic problem. The method of the equivalent elastic problem is of major assistance to designers of plastic products since, by knowing the elastic solution to a problem, the viscoelastic solution can be readily deduced by simply replacing elastic physical constants with viscoelastic constants. [Pg.113]

A common use is with a plastic hub or boss accepting either a plastic or metal insert. The press fit operation tends to expand the hub creating a tensile or hoop stress. If the interference is too great, a very high strain and stress will develop. The plastic product will (1) fail immediately by developing a crack parallel to the axis of the hub to relieve the stress, a typical hoop stress failure, (2) survive assembly but fail prematurely when the product is in use for a variety of... [Pg.189]

Inelastic deformation can cause product failure arising out of a massive realignment of the plastic s molecular structure. A product undergoing inelastic deformation does not return to its original state when its load is removed. It should be remembered that there are plastics that are sensitive to this situation and others that are not. [Pg.203]

A table can be prepared summarizing the steps in the design of a plastic product. It would indicate the different types of options that can be used at different stages in the design sequence. It also would indicate the areas of potential high risk failure and the alternative approaches to use under these conditions. Example of a design program approach follows ... [Pg.207]

This type of caution approach is essential in high risk applications since only certain plastics can be used as the basis for such applications. This chapter has been concerned with the problems of the product in use under the types of environments and potential abuse that may be encountered, and how the designer can prevent premature product failure which is one of their major responsibilities. [Pg.275]

Avoiding product failures can depend, in part, on the ability to predict the performance of plastic materials and their shapes. With available time, the usual approach of product prototype and/or field-testing provides useful and reliable performance data when conducted properly. As an example designers continue to develop sophisticated computer methods for calculating stresses in complex structures. [Pg.293]

Much of the market success or failure of a plastic product can be attributed to the initial choice of material. Even though the range of plastics has become large and the levels of their properties so varied that in any proposed application only a few of the many plastics will be suitable. [Pg.412]

Plastics Failure Guide Cause and Prevention , Myer Ezrin Hanser Gardner Pubis (1996) ISBN 1569901848. The focus of this book is on actual field and product failures. This comprehensive volume emphasizes cause and prevention and illustrates how and why a variety of plastic products... [Pg.615]

In-Mould Decoration of Plastics, J.C. Love and V. Goodship, The University of Warwick Rubber Product Failure, R.P. Brown. [Pg.133]

Readers can obtain the latest and more detailed data and information from suppliers and/or software programs. The guides presented in this book only provide a means to compare the general performances of different plastics. Since new developments in plastic materials are always on the horizon it is important to keep up to date. It is important to ensure that the fabricating process to be used to produce a product provides the properties desired (Chapter 3). Much of the market success or failure of a plastic product can be attributed to the initial choices of material, process, and their cost. [Pg.40]

Storage conditions play quite an important role for the overall quality of margarine products. Insufficient or improper storage conditions can lead to several product failures such as sandiness or graininess, oiling out, lack of plasticity, brittleness, or microbiological spoilage for sensitive product types (86). [Pg.2917]

Principia Partners, 1, 2, 44, 45 Procell, 58, 60, 110, 311, 587 Processability, 61 Processing speed, 50 Processing window, 660, 664 Product crumbling, 496, 567 Product failure, 496 Product property, 226 Progressive degradation, 502 Propagation of free radicals, 208 Propioconazole, 416 Propylene plastics, 68 PVC-based boards, 36... [Pg.692]


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See also in sourсe #XX -- [ Pg.417 ]




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