Extrudable thermoplastic

Patent Number US 5801208 A 19980901 BLOWING AGENT, EXPANDABLE COMPOSITION, AND PROCESS FOR EXTRUDED THERMOPLASTIC FOAMS Shau-Tarng Lee Sealed Air Corp. 

Patent Number WO 9417133 A1 19940804 EXPANDABLE COMPOSITION AND PROCESS FOR PRODUCING EXTRUDED THERMOPLASTIC FOAM... 

Pellethane is an extrudable thermoplastic polyurethane based on MDI and a hydrophobic polyol was used in this application. For the most part, the application was successful, but evidence of stress cracking became apparent. The combination of the hydrolytic environment and the polymer under tension caused failures that led to current leakage and ultimate failure of the device. As a result, softer grades of Pellethane and alternative annealing procedures were adopted and reduced the problem dramatically. 

The liquid monomers are suitable for bulk polymerization processes. The reaction can he conducted in a mold (casting, reaction injection molding), continuously on a conveyor (block and panel foam production), or in an extruder (thermoplastic polyurethane elastomers and engineering thermoplastics). Also, spraying of the monomers onto the surface of suitable substrates provides insulation barriers or cross-linked coatings. 

Different processes have been developed with a few in use. Their designs usually start with an extruded thermoplastic sheet. Circular blanks cut from the sheet are compression molded into the desired preliminary shape. During the compression action, the blank can be simultaneously stretched, or being thermoplastic can be stretched after compression molding. They generate no trim scrap when formed... 

In general two types of secondary coatings are used in conjunction with the primary coatings described above. UV-curable epoxy acrylates or urethane acrylates are commonly used for in-line application, as the fiber is drawn. These same materials are also used extensively as single coatings. Extruded thermoplastics, such as nylon or polyester elastomers, are frequently used for off-line application processes. 

A promising alternative for the production of unpainted body panels is the use of a co-extruded thermoplastic film as a decorative layer which is back-moulded with a thermoplastic material [107]. This technique has received the name paintless film moulding (PFM ) (Figure 16.16). 

Batch injection molding machine thermoplastics commodity resins, polyolefins (LDPE, HDPE, PP), styrenics (PS, PMMA. polycarbonates, ABS, PET), and engineered resins for higher impact strength. Continuous extruder thermoplastics. Casting PP fine film 10 to 50 pm cast film 100 to 400 pm thermoformable sheet 200 to 2500 pm. Film blow LDPE, HDPE, PP. Pug mill clay materials for bricks, tiles, and ceramics. 

Extrudable thermoplastic with capstock layer. [Data from Jeng, j p, us Patent... 

Building material and method of its manufacture is included in invention. Product includes an extrudable thermoplastic (e.g., PVC of the above formulation) or thermosetting substrate having a fluorocarbon-based capstock layer... 

Use of p-aramids in molded or extruded thermoplastic parts offers performance advantages over neat resins or glass-reinforced resins. Aramid reinforced parts exhibit improved mechanical and thermal properties and superior wear resistance with no abrasion to the counter surface. Because the fiber is not abrasive, there is less damage to processing equipment and machining of parts is simplified. 

Extruder thermoplastics. Extruders are polymer mixers or reactors that push molten polymer through a die. The die configuration is chosen to produce blown film, coatings, sheets, monofilaments, coatings for wire and cable, cast film or special shapes like siding, downspouts. Three general types single screw, vented and twin screw. 

Certain seamless extruded thermoplastics (e.g., CPVC) can be suitable when properly supported but are limited in size. In all but the smaller plants, they are not available in the diameters required for chlorine headers. In the past, rubber-lined piping was used, but its service life was limited and it required more Hanged connections than butt-connected piping. The standard choice for chlorine headers today is still FRP. 

Belgian Association of Manufacturers of Extruded Thermoplastic Pipes (Tubuplast)... 

Costa, P.P., Silvia, C.C., Viana, J.C., Lanceros Mendez, S.S. Extruded thermoplastic elastomers styrene-butadiene-styrene/carbon nanotubes composites for strain sensor applications. Compos. B Eng. 57, 242-249 (2014)... 

Belgian Association of Manufacturers of Extruded Thermoplastic Pipes Rue des Drapiers 21 B-1050 Brussels Phone (32) 2 510 2507 Fax (32) 2 510 2562... 

Hietala M, Mathew AP, Oksman K (2013) Bionanocomposites of thermoplastic starch and cellulose nanofibers manufactured using twin-screw extrusion. Eur Polym J 49 950-956 Hoover R, Hughes T, Chung HJ, Liu Q (2010) Composition, molecular structure, properties and modification of pulse starches a review. Food Res Int 43 399-413 Hotza D (1997) Colagem de Folhas Ceramicas. Tape Casting Ceramica 159-166 Huneault MA, Li H (2012) Preparation and properties of extruded thermoplastic starch/polymer blends. J Appl Polym Sci 126 96-108... 

C5 ras VP, Manfredi LB, Ton-That M-T, Vazquez A (2008) Physical and mechanical properties of thermoplastic starch/montmorillonite nanocomposite films. Carbohydr Polym 73 55-63 de Morals Teixeira E, Correa A, Manzoli A, de Lima Leite F, de Oliveira C, Mattoso L (2010) Cellulose nanofibers from white and naturally colored cotton fibers. Cellulose 17 595-606 de Moura MR, Aouada FA, Avena-Bustillos RJ, McHugh TH, Krochta JM, Mattoso LHC (2009) Improved barrier and mechanical properties of novel hydrox5q)ropyl methylcellulose edible films with chitosan/tripolyphosphate nanoparticles. J Food Eng 92 448—453 Dean K, Yu L, Wu DY (2007) Preparation and characterization of melt-extruded thermoplastic starch/clay nanocomposites. Compos Sci Technol 67 413 21 Duanmu J, Gamstedt EK, Rosling A (2007) Hygromechanical properties of composites of crosslinked allylglycidyl-ether modified starch reinforced by wood fibres. Compos Sci Technol 67 3090-3097... 

Applications. Numerous uses of x-ray analysis were reported for filled systems. They include orientation of talc particles in extruded thermoplastics, particle size determination in nanocomposites, crystallinity of talc nucleated PP, ... 

Figure 7.13 Anisotropic modulus of extruded thermoplastic rubber.

Dean, K., Yu, L., and Wu, Y. D. Preparation and characterization of melt-extruded thermoplastic starch/clay nanocomposites. Composite Science and Technology 67,413-421 (2007). 

Extrudable thermoplastics Petroleum waxes Netherlands 6,219 1964 Societe Nationale... 

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