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Teunis, In reference to your first post and noticing that you only have 40 pieces as samples and two of them fractured. My immediate guess is that the tool in which they were molded may not have been up to proper molding temperature for all of the parts when molded or another molding anomaly...

TonyLosey, How may I be of service to you. I have prototyped many closures and automotive components which use a living hinge. theanswerguy@tr-usa.com

Viper488, I design plastic components and also work as a Manufacutuers Rep. I did not see enough information in your post to point you in the right direction. Although you should do a search on www.google.com for "plastic boxes". Their are many manufacturers out there that have stock...

aspearin1, Depending on your design, you may want to injection mold the bladder. Santoprene for the most part is part rubber and part Polypropylene. The PP mixed with the rubber is what makes it injection moldable. theanswerguy@tr-usa.com

dezignit, I suggest that you take all situations into account. For instance: What if, the lantern tips over and spills the combustible fluid onto the clear lens? What if, the combustible fluid flashes over? These are simple reasons as to why companies like "Coleman" use glass...

Viper488, Check-out this webpage. http://www.sdplastics.com/phenolic.html I do not represent them. But they do have a complete list of phenolic materials. You should be able to select the correct grade based on that information. By the way. usually one of the best ways to cut Phenolic is...

ttx, I think the chart on this link will help you. http://216.91.69.172/DCatalog/pages/N112_frame.htm theanswerguy@tr-usa.com

chookie, I think you have already answered your own question. If you only need 5 for prototype purposes. Maybe you should just buy 5 clipboards and use their clips! On the other hand I did a quick search on www,google.com I put in "clipboard clip" This was the first listing on the page...

BOB, You can try contacting Northview Laboratories. They do accelerated aging studies. You can reach them at: http://www.northviewlabs.com/ theanswerguy@tr-usa.com

proddesign, definitely check-out SPE www.4spe.org You should also search on either Google or Dogpile.com for some free information. I am also guessing that you have done your homework on the best process to use for production. The reason that I mention this is due to the fact that most of...

hollywhite, You may also want to consider "RIM". I have done parts like you are refering to using this process. You may visit this link to get more info! http://www.adaptplastics.com/urethane.htm theanswerguy@tr-usa.com

Pat, I think that you are on the right track here. From what I am understanding is that what he is looking for is thin guage vinyl sheet. I dont know if you had a kids art set like I did that was made by "Colorforms"? (I know that you don't live here in the U.S. but I have seen your posts...

shoobaka1, Check-out Santoprene by Advanced Elastomers I believe that you will find most of the properties you seek within the material. www.santoprene.com It's your design and the type of compression set ("return to the original shape") that you experience or find acceptable, will be up to...

Albion2, Most of the companies are starting to get the point about making viewers free of charge. If I were you I would check-out the websites of the CAD vendors and you may be surprised at what you will find. You can also check the Cnet website called: www.download.com and search for a...

brettac, As long as your tool design had included the shrink factor for the threads, you should be fine. Polyethylene is a material which typically has a lower durometer than Polypropylene and is subject to deformation as you are witnessing. The caps such as used on soda bottles are molded in...

Most of the US car makers are using the PC/ABS blend. theanswerguy@tr-usa.com

5Fish, All of the answers you have been given thus far are excellent scenarios. What I think, should also be checked out is if your molder has started to use a mold-release product or has changed brands. Most of these products are very good, but I have found some that will actually plug-up...

Adrian2, It is not so much the snap area that is going to cause trouble for you as the living hinge area will. My suggestion is that you go to the store and buy one of those small "M&M" candy containers (platic tube w/snap lid) and take some measurements. That type of closure will...

sdk, Without knowing anything about your part design it is pretty hard to give direction. But a for good overall fix (and mind you I am shooting from the hip here) I would try using the glass filled PP as Pat is suggesting. Ultem is very good for use in High Heat and in areas where it may...

sealguy, If you E-Mail Me at: quote@tr-usa.com I would be pleased to help you out. The parts would be manufactured in the Chicago area. We are past employees of Glenn Beall.