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I need a technical book on the silicone rubber extrusion process which describes the extrusion process from mixing the silicone to the extruder, and the curing process using ovens. Can anyone give me a reference? Thanks a lot JoeReturn to Top
In article <32B098B1.7296@dynamotive.com>, billmccReturn to Topwrites: >Christopher Wright wrote: >> >> In article <32AEDDD0.33ED@compuserve.com>, 100015.132@compuserve.com wrote: >> >> >We are looking for finite element modeling (FEM) and finite element >> >analysis software systems which can handle or are specialized for fiber >> >reinforced plastics / composites. What is the most used system? What >> >runs on PCs, what on Apple Macintosh? What other platforms are there? >> >> COSMOS/M has this capability and runs on Windoze and the Mac. The Mac >> installation is good for a vertical market program--a little quirky for us >> die-hard Mac bigots, but 100% better that ANSYS on WinNT, which I've also >> used. The COSMOS modeller is better than ANSYS, but the post processing >> not as good. You might also want to check out LapFEA which is the old >> MSC/pal. >> >> Christopher Wright P.E. |"They couldn't hit an elephant from >> chrisw@skypoint.com | this distance" (last words of Gen. >> ___________________________| John Sedgwick, Spotsylvania 1864) >> http://www.skypoint.com/subscribers/chrisw > >I would add a note of caution on the above: If you are at all interested >in the prediction of buckling loads (or are interested in ply by ply >analysis) none of the above code in my experience will do a good job. >All of them have been demonstrated to miss low order modes (the ones >that count). The only two general purpose commercial codes that do a >pretty good job (but don't just believe what you see - confirm it) on >most of the low order modes are Mark's and ABAQUS. A pretty good Mesher, >I hear, is FEAmap. I hear HYPERmesh works pretty well too but a little >more difficult to use. I am not aware of any codes that will give you >the ply-by-ply analysis. A great mesh generator is STRIM from Matra Datavision. Moldflow did an evaluation of the top mesh generator, and this came out on top. You'll still need a solver, but don't discount STRIM for meshing. By the way, STRIM was ranked as the #1 surface modeler by DH Brohn & Associates and Matra ranks as the #1 provider of CAM worldwide. http://www.matra-datavision.com -------------------------------------------------------------------------- -------------- EEEEEEEEEEEE EXCELERATION, Incorporated EEEEEEEEEEEE Mike Roberts - President EEEEEE 4771 South 99th Street EEEEEEEEEEEE Milwaukee, WI 53228 EEEEEEEEEEEE PH: 414.427.8139 EEEEEE FX: 414.427.0092 EEEEEEEEEEEE Email: cadcammike@aol.com EEEEEEEEEEEE Manufacturers Representatives of High-Technology Companies -------------------------------------------------------------------------- -----------------
I know that RTV is essentially a formulation of poly(dimethyl siloxane). But what do the letters RTV mean? Mark NicholasReturn to Top
Dear Netters: I would like to know if someone has managed to use a laser printer (rather than a dot matrix or thermal) on a Waters 990 GPC, with analysis using Maxima software. Apparently the company maintains that no other printer could be installed and that aint making me happy. Sincerely, S. IyerReturn to Top
Anyone know of an easy way to heat and test different formulations of Krayton rubber. The supplier says it will become liquid at less than 400 F. Have tried both pellets and powder. Just burns for me. theta@vegas.infi.netReturn to Top
In article <32B20380.196A@evanseast.com> Evans EastReturn to Topwrites: >I know that RTV is essentially a formulation of poly(dimethyl siloxane). But what do the >letters RTV mean? > >Mark Nicholas RTV = Room Temperature Vulcanized -Bob Cunningham bobc@tiac.net
Does anybody work with PANi and Epoxy Complex ? If anybody can send me an information, I appliciate that.. E-mail Address : kkim05@ix.netcom.com Name : Kwang Suk KimReturn to Top
Christian Laval wrote: > > We are looking for finite element modeling (FEM) and finite element > analysis software systems which can handle or are specialized for fiber > reinforced plastics / composites. What is the most used system? What > runs on PCs, what on Apple Macintosh? What other platforms are there? > > Thanks for the help! > > Christian Laval > 100015.132@compuserve.com caution - i once designed a landing gear attachment point that was on paper twice as strong as equivalent aluminum. however, the failure mode involved delamination of a built up thick composite hard point. I understand the importance of shear and localized forces. (very memorable sound when your gear folds underneath you). don't know how to model this. the failure pulled a washer over top of the nut on a 3/8" bolt, and put a 15 degree bend on the AN bolt. failure was by slow delamination by shear. don't know how to model that!Return to Top
Ryu Young-sikReturn to Topwrote: >I am looking for informations about Poly(ethylene >terephthalate)recycling but couldn't find enough references. Try looking into the patent literature. Kodak and others have patents on recycling technologies for polyester.
I am seeking information on the causes and prevention of yellowing in white (bleached) Nyon fabric.Return to Top
About 4 years ago, one of the TV networks/channels ran a story about a guy who had used a 'bubbling' process to produce/make a thick block of polyurethane (I believe this was the root material!) that was still transparent and did not have any visual distortion. I think that he was from California and I remember a company's marquis that he had made was shown outside a building. The marquis appeared to be at least 4" to 6" or more thick and was absolutely transparent. I want to use this material (chemical process) to make a bell-jar shaped dome if I can ever find the source. Will appreciate any leads. Mike Austin [Austin@midrivers.com or Orfed@aol.com] or 5180 Mussellshell Road, Custer, MT 59024; 406-856-4107.Return to Top
Eric Sinclair wrote: > > In article <4uvht4$frq@vixc.voyager.net>, "A. Latham"Return to Topwrote: > > Back in middle school, I remember being shown this substance that the > > teacher called ooblek. It would remain a solid until you touched it more In thixotropic terms, I believe the property you are intrigued by is called "dilatemt." Just like silly putty, and other PVC plastisols. Dan Bollinger Industrial Designer
In article <32B0A818.3145@holli.com> Dan BollingerReturn to Topwrites: >Eric Sinclair wrote: >> >> In article <4uvht4$frq@vixc.voyager.net>, "A. Latham" wrote: >> > Back in middle school, I remember being shown this substance that the >> > teacher called ooblek. It would remain a solid until you touched it more > >In thixotropic terms, I believe the property you are intrigued by is >called "dilatemt." > >Just like silly putty, and other PVC plastisols. > >Dan Bollinger >Industrial Designer > I believe "oobleck" was invented by some wizards in a Dr Seuss Story where the king was tired of only rain snow and sunshine, it fell from the sky and was green and was a great adhesive.
I second your idea to initiate more specific areas of general interest to subscribers of the newsgroup sci.polymers. Some of the subjects could be 1) Processing, Structure-property inter-relationships 2) High performace polymers, Specialty polymers, etc. Dr. Y.C.BhuvaneshReturn to Top
I second your idea to initiate more specific areas of general interest to subscribers of the newsgroup sci.polymers. Some of the subjects could be 1) Processing, Structure-property inter-relationships 2) High performace polymers, Specialty polymers, etc. Dr. Y.C.BhuvaneshReturn to Top
On your next search and surf expedition, consider a visit to IndustryLink: http://www.industrylink.com, the comprehensive, easy-to-review directory of Industry and Manufacturing related web sites.Return to Top
Seeking job in polymer industry: Production, Research & Development, Quality Assurance, Product Development. Interested party may c= ontact me by any of the following means. Willing to relocate and available immediately. Polymer Processing (extrusion of fibers, tapes, films, molding, etc.) Specialty fibers for applications in composites, geotextiles, non-wovens, industrial applications, electronics, etc. Processing, structure property inter-relationships, mechanical properties, viscoelasticity, etc. Design and validation of equipment for polymer processing. Home Address: Office address: #1, 134 Cochran Rd. Research Associate/Assistant Professor Clemson SC 29631, USA School of Textiles, Fiber & Polymer Science Ph./Fax: (864) 654-3764 264 Sirrine Hall, Clemson SC 29634 -1307, USA Ph:(off) (864) 656-7537 Fax: (864) 656-5973 E-mail: bbhuvan@mail.clemson.edu URL : http://hubcap.clemson.edu/~bbhuvan SKILLS & EXPERIENCE Research and practical experience Production of fibers (by High speed melt spinning of fibers), micro-denier fibers, tapes, films, biaxially oriented films, non-woven= s, etc. High Speed melt spinning of PET, N6, N66, N11, Polypropylene, Blends, etc. Carpet yarns with improved resilence. Creep-resistant Polypropylene yarns for applications in geotextiles, composites, carpets. Low pill, easy dyeable, high speed texturisable Polyester. Improvement of mechanical properties of PET (130 gpd, etc.) Radially-differentiated structure of PET and its influence on Torsional fatigue properties. Polypropylene with electret characteristics for applications in filtration, etc. Hollow Fibers from Poly(vinylidene Fluoride) Bio-degradable Fibers from PolyCaprolactone Processing of polymers and inter-relationships with structure and properties Process simulation tools for processing of polymers. Mechanical properties of polymers (viscoelasticity, etc.). Rheology of polymers in shear flow and in extensional flow. Production of composites reinforced with short-fibers, 3-dimensional textile fabrics, etc. and their directional properties. Investigation of processing conditions to develop unique morphological structures in polymers. Design of machinery for polymer processing (Eg. metering pumps, quench chambers, etc.) Offered consultancy services to industrial clients: Trained personnel from industry and academic organisations. Administrative : Handled various administrative responsibilities including overseeing of computerisation -of administrative activiti= es. Computer Proficiency: Extensive computer programming skills (C, Fortran, UNIX, Dos, etc.). Interactive softwares developed for comp= uter simulation of melt spinning of polymers. Some of these softwares are currently being used by industry. EDUCATION Ph.D. in Fiber Science & Technology, Indian Institute of Technology, New Delhi, India (July 1995). Research topic for doctoral degree: Some studies on inter-relationships between processing, structure and properties in isotactic po= lypropylene fibers. Master of Technology in Fiber Science & Technology, Indian Institute of Technology, New Delhi, India. C.G.P.A. = 8.9 (December 89). Bachelor of Engineering in Textile Engineering from Gulbarga University, Gulbarga, India. (February 1988 with 78.5% with distincti= on and with first rank. AWARDS RECEIVED : Ranganatha Memorial Gold medal for First Rank Holder in Final year B.E. (1987). Precitex award for Best Student in Spinning (1987). Topped the All India "Graduate Aptitute Test for Engineers" (GATE) (1988). Recepient of GATE scholarship for completion of Master of= Technology degree in Fiber Science & Technology. WORK EXPERIENCE [1] Research Associate/Assistant Professor (Post-doctoral position) at School of Textiles, Fiber & Polymer Science s= ince November 1995. [2] Senior Scientific Officer at Indian Institute of Technology, Delhi. June 1990 to Oct. 1995. Commisioning, running, maintenance and research activities on Fourne High Speed Melt Spinning Plant (SST 1207) along with a host of= related utilities. Production of various deniers of HDPE, PP, PPCP, N6, N66, N11, PET, etc. at various spinning speeds upto 4000 m/= min. PUBLICATIONS Y.C.Bhuvanesh and V.B.Gupta, "Long-term prediction of creep in textile fibers', Polymer Communications, Vol. 35, No. 10, p2226 (199= 4). Y.C.Bhuvanesh and V.B.Gupta, "Computer simulation of melt spinning of poly(ethylene terephthalate using a steady-state model", Indi= an Journal of Fiber and Textile research, Vol.15, p145, Dec. (1990). Rajkumar Verma, Y.C.Bhuvanesh, V.B.Gupta, T.Manabe and Rajesh Jalan, "Some studies on melt flow behaviour of poly(ethylene terephtha= late)" in Special issue on Recent Advances in Man-made fibers, Indian Journal of Fiber and Textile Research, Vol.16, p39, Mar. (1991= ). Y.C.Bhuvanesh and V.B.Gupta, "Interaction between viscoelastic and structural relaxation in drawn polypropylene yarn", Polymer, Vol= 36, p3669 (1995) Y.C.Bhuvanesh and V.B.Gupta, "Computer simulation of melt spinning of polypropylene fibers using a steady-state model", J. of Appl.= Polym. Sci. Vol. 58, No. p663 (1995). Y.C.Bhuvanesh and V.B.Gupta, "Processibility and properties of polypropylene containing small amounts of polystyrene", J. of Appl. = Polym. Sci., Vol 60, p1951 (1996). V.B.Gupta and Y.C.Bhuvanesh, "Studies on Shrinkage characteristics of yarns made from Polypropylene and Polypropylene containing 5 p= ercent by weight of Polystyrene", Indian J. of Fiber & Textile Res. (in press). P.Bajaj, Y.C.Bhuvanesh and A.Bhargava, "Effect of Diffussional rate on the structure and properties of wet spun Acrylonitrile terpol= ymer protofibers", under preparation for J. of Appl. Polym. Sci. S.A.Mondal, V.B.Gupta and Y.C.Bhuvanesh, "Relationship between spinning speed and throughput rate during Melt Spinning of some fiber= forming polymers", communicated to J. of Appl. Polym. Sci. Y.C.Bhuvanesh and V.B.Gupta, "Long-term creep behaviour of drawn polypropylene yarn and polypropylene-polystyrene blends", under pre= paration for J. of Appl Polym Sci. BOOKS Contributed to a book entitled "Production, structure and properties of Man-made Fibers", in press, Chapman & Hall, London.Return to Top
Evans EastReturn to Top次寫入到主題 <32B20380.196A@evanseast.com>... > I know that RTV is essentially a formulation of poly(dimethyl siloxane). But what do the > letters RTV mean? > > Mark Nicholas > RTV stands for Room Temperature Vulcanization.