Document JrrJVdq1GoG64wMqK8eaQzj0Z

PLAINTIFF'S EXHIBIT October 2, 1959 Mr* 3. A. Edberg Koppers Company, Inc. Plastics Division Monaco, Pennsylvania Dear 24: Please excuse the delay in getting the roll roofing mock-up down to you* I was originally planning to use our Architect shingle stock; however, this product was not scheduled to be run for some time in the colors I wanted* Finally, I was able to have some material run on our roll roofing machine which was actually much more satisfactory for my purposes* The mock-up left 2aat Walpole on September 30th via Railway Express* This system is experimental as far as we are concerned* The area requiring more study would be the adhesive system used to cement the joint Insert strip* Also, our present take-off equipment could not handle a 43" wide sheet. best estimate, at present, is that the price of this roofing material would be in the $4*00/square range* We would strongly recommend that a hot melt adhesive be used to adhere the roofing to your plywood akin. Bird Ranch Roof cement would be satisfactory; however, it is a solvent cut-back and might affect your Dylite* If used in excess, it might also cause blistering of the roofing due to solvent entrapment* The hot melt application would probably require only 10 pounds or so of adhesive, .e have an adhesive with which a square of material could be applied with roughly one dollar's worth of adhesive at most. Ranch Roof cement could be applied cold and the material cost would be in the $1.25 range. BIRD 011691 i4r. A. idberg -- 2-- October 2, 1959 We would definitely think la toms of handling this material In roll fora* 1 would appreciate any thoughts you nay hare aa to linear footage per roll, etc* Actually, we do not hare equipment to wind this product at present. We could offer a large variety of colors with a limited choice of patterns such as bands or swirls of color for a product such as this* The joint system between panels would consist of a 4" wide insert joint strip which would be applied at the site* This could lend itself to either site application of the adhesive or factory application* My thinking, at present, is that a 2" selvage edge on each odge of the roofing would be sufficient if a careful application of the joint insert strip Is achieved. It would probably be an easy matter to design a hand tool whleh would apply adhesive and lay the joint insert on the site. This particular mock-up which 1 have sent to you has a pressure sensitive adhesive holding the insert joint strip* I have included a black Insert strip in the crate in ease you are interested in seeing a second contrasting color* These insert strips were laboratory fabricated and are rougher than production material would be* I shall be very interested in the reaction of your group to this material* Zt is a rather simple and obvious attack to factory installed finished roofing* If you were to use this product, could you give me any idea of your annual volume requirements? Z seat twenty four pieces of 4' x &' Bird YJ Insul Sheath (foil one side) to Mr* Garay on September 23* I shall send him a letter covering this* The expansion of our semi-pressed hardboard is 0*02$ at the maximum* I have sot been able to lay my hands on the values for fir plywood* Gur tests were run with 50$ to 97$ KH/24 hours. X hope I have answered most of the questions you might have at this tine* If not, please lot me know* BIRD 011692 ^Ir. A. -3- October 2, 1959 The 3.R.I. sandwich panel program looks very interesting. I look forward to seeing you there. Tours truly, BIRD & SON, IHC. SEO/rp C. C. : 'WtAS. Herman D. Olson Development Chemist 7^