Modern Plastics Handbook 2011 Part 12 pps

... when decorating plastic parts. Prior to decoration, the surface of the plastic part must be cleaned of mold release, inter- nal plastics lubricants, and plasticizers. Plastic parts can also become electrostatically ... plastic parts prior to decorating. Cleaning of the plastic part requires an understanding of the plastic material to be cleaned and the effect of the solvents and process...

Ngày tải lên: 11/08/2014, 16:22

... Five TABLE 5.8 Selected Die Constants 61 Die profile Die constant, K Circular 128 (L ϩ 4D c )/␲D c 4 Slit 12L/WH 3 Annular 12L/␲D m H 3 Note: L ϭ die land length, D c ϭ diameter of a circular die, ... single-stage plunger units are still used with bulk molding compounds 127 and for very small parts. Two-stage screw-plunger machines (Fig. 5.56 128 ) use a screw to melt the plastic and a s...

Ngày tải lên: 11/08/2014, 16:22

... 48. 124 . Schott, N. R., private correspondence. 125 . Berins, M. L., Plastics Engineering Handbook, p. 134. 126 . Ibid., p. 136. 127 . Wright, R. E., Injection/Transfer Molding of Thermosetting Plastics, ... Petrothene® Polyolefins, p. 85. 120 . Berins, M. L., Plastics Engineering Handbook, p. 116. 121 . Petrothene® Polyolefins, p. 73. 122 . Finch, C., presentation notes. 123...

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... position is at the end of the part. Most of the part has a high confidence of fill. However regions far from the gate are shown in yellow, while areas at the end of the part are shown in red. Such ... shell-based analysis. These parts are also amenable to 3D/FEA. In addition to broadening the range of parts that can be simulated, 3D/FEA also couples well with solid modeling. A particular...

Ngày tải lên: 11/08/2014, 16:22

... 11.94 Chapter 12. Plastics Recycling and Biodegradable Plastics 12. 1 12. 1 Introduction 12. 1 12. 2 Overview of Recycling 12. 14 12. 3 Design for Recycling 12. 22 12. 4 Recycling of Major Polymers 12. 24 12. 5 ... Overview of Plastics Degradation 12. 71 12. 6 Natural Biodegradable Polymers 12. 80 12. 7 Synthetic Biodegradable Polymers 12. 92 12. 8 Water-Soluble Polymer...

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... Brydson, Plastics Materials, 6th ed., p. 492. 119. Ibid., p. 492. 120 . Ibid., pp. 494–495. 121 . Ibid., p. 493. 122 . Ibid., p. 496. 123 . Ibid., p. 497. 124 . Strong, Plastics, p. 192. 125 . Brydson, Plastics ... Encyclopedia Handbook, McGraw-Hill, Inc., New York, 1994, p. 71. 394. Brydson, Plastics Materials, 6th ed., p. 341. 395. Strong, Plastics, p. 173. 396. Hurter, D.,...

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... Elastomers,” in Handbook of Plastics, Elastomers, and Composites, 3d ed., Charles A. Harper, ed., McGraw-Hill, New York, 1996. 10a. Joseph F. Meier, “Fundamentals of Plastics and Elastomers,” in Handbook ... strength, lb/in 2 (MPa) 900 1750 2150 (6.2) (12) (15) Ultimate elongation, % 265 380 350 Compression set @ 22 h, % 212 F (100°C) 28 39 52 257°F (125 °C) 37 48 78 Tension set (%)...

Ngày tải lên: 11/08/2014, 16:22

... orientation. 0267146_Ch05_Harper 2/24/00 4:54 PM Page 5.16 4 .12 Light Stabilizers 4 .12. 1 Description Light stabilizers are used to protect plastics, particularly polyolefins, from discoloration, embrittlement, ... affected. With some difficult-to-crystal- lize thermoplastics, such as partially aromatic polyamides or PET, nucleants are needed to obtain useful parts with reasonable cycle t...

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... reject finished parts. Whatever the source, economics dictate that the scrap be reintroduced into the material stream. The first step in the process is to grind the parts into a particle size small ... single desiccant-coated honeycomb wheel rotates slowly, exposing part of the wheel to process air, part to regen- eration, and part to cooling prior to returning to the process. 7.48 Chap...

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... the piece part cost will be greater for a part produced by structural foam molding than for a similar part made by injection molding. The reduced molding pressure does permit larg- er parts to ... the part will fail below its design limit. This requires careful attention to a number of critical areas. The majority of differences between the design of plastic parts and the design of pa...

Ngày tải lên: 11/08/2014, 16:22