the effect or riMrri \Fin on certain mechanical 
 
 PROPERTIES OE FOREST PRODUCTS LABORATORY, 
 
 HIGH-STRENGTH, CROSS-LAMINATED 
 
 PAPER PLASTIC (PAPREG) 
 
 May 1943 
 
 RESTRICTED 
 
 CLASSIFIED DOCUMENT 
 
 This document contains classified information affecting 
 the National Defense of the United States within the 
 meaning of the Espionage Act, USC 50:31 and 32. Its 
 transmission or the revelation of its contents in any 
 manner to an unauthorized Pjjson is Jitt'L^ycJ ^y bw 
 
 Stattk^U^fn df>mrc civilian officers and employees of 
 the Federal Government who have a legitimate interest 
 therein, and to United States Citizens of known loyalty 
 and discretion who of necessity must be informed 
 thereof. 
 
 
 "ci^ppo 
 
 This Report is Cnt of a Series 
 
 Issued In Cooperation with the 
 
 irM> air foprr s 
 
 and the 
 
 BUREAU CF AERONAUTICS 
 
 Under the Supervision off the 
 
 AERONAUTICAL CCARU 
 
 NO. 1321 
 
 UNITED STATES DEPARTMENT OF AGRICULTURE 
 
 FOREST SERVICE 
 
 FOREST PRODUCTS LABORATORY 
 
 Madiion. Wisconsin 
 
 to Cooperative with the Umrersity of Wiaeonno 
 
 
 
Digitized by the Internet Archive 
 
 in 2013 
 
 http://archive.org/details/temperatOOfore 
 
THE EFFECT OF TEMPERATURE ON CERTAIN MECHANICAL PROFERTIES 
 OF FOREST PRODUCTS LABORATORY HIGH-STRENGTH, CROSS- LAMINATED 
 
 PAPER PLASTIC (PAFREQ)- 
 
 2 
 
 This report presents the results of a series of tests— to determine the in- 
 fluence of temperature on the strength properties of cross-laminated papreg. 
 The material was furnished "by the Forest Products Laboratory and the tests 
 were made "by the Monsanto Chemical Company. 
 
 The tests included tending, tension, edgewise compression, and impact (Izod) 
 for cross-laminated material at -80° C. , -25° C. , 25° C. , 100° Q.i and 150° C, 
 
 The material consisted of l/8-inch and l/2-inch panels, made of Mitscherlich 
 laminating paper, impregnated with Monsanto Resinox U65 and Bakelite BVI6303, 
 and pressed at 2^0 pounds per square inch. The resin contents, "based on the 
 weight of the treated paper, were J>8.& percent and 3^.0 percent, and the 
 volatile contents 5*2 percent and ^.5 percent, respectively, for the Monsanto 
 and Bakelite resins. 
 
 Five tests each were made in bending, tension, flatwise and edgewise (Izod) 
 impact, and compression, for each of the five temperatures. The sizes of the 
 test specimens were as follows: 
 
 Tension: J>/k x 1/8 x 9 inches, with center section reduced 
 
 to 1/2 inch. 
 Bending: 1/2 x 1/8 x U inches, tested over a 2-inch span. 
 Compression: 1/2 x 1/2 x 1 inch. 
 Izod: 1/2 x 1/2 x 2-1/2 inches. 
 
 The results of the tests are presented in Table 1. While the data are not 
 based on extensive tests or a wide variety of products they, nevertheless, 
 give an indication of the effect of temperature on this material. Of the 
 values obtained, those for tensile strength are probably the most accurate 
 and those for flexural strengths the least accurate over the temperature 
 range studied. 
 
 Further and more extensive tests on the effect of temperature and other 
 factors on the strength of papreg are under way at the Forest Products Lab- 
 oratory. 
 
 -This mimeograph is one of a series of progress reports prepared by the 
 Forest Products Laboratory to further /Nat ion's war effort. Results here 
 reported are preliminary and may be revised as additional data become 
 available. 
 
 ■=By D. Telfair and R. U. Haslanger, Research Department, Plastics Division, 
 Monsanto Chemical Company. 
 
 Mimeo. No. 1321 
 
Table 1. — Influence of temperature on the mechanical properties of crosr, - 
 lar.inated, high-strength laminated paper plastic (pa prep") . 
 
 Temper- 
 fit 'ire 
 
 : Re3in 
 : use! 
 
 
 Mechanical 
 
 properties 
 
 
 
 at 
 
 Ultimate 
 
 : Ultimate 
 
 : Modulus 
 
 : Impact 
 
 : Impact 
 
 : Modulus of 
 
 test 
 
 
 tensile 
 
 : Compressive 
 
 : of 
 
 : strength 
 
 : strength 
 
 : elasticity 
 
 
 
 : strength 
 
 : strength 
 
 : rupture 
 
 : (flatwise) 
 
 : (edgewise) 
 
 : (tension) 
 
 
 :Recinox 
 : U65 
 
 : Lb. per 
 : sq.in. 
 
 : 38,200 
 
 : Lb. per 
 : sq.in. 
 
 i 29 , 500 
 
 : Lb. per 
 
 :Ft. lb. per 
 
 :Ft.lb. rer 
 
 : 1,000 lb. 
 
 
 : sq. in. 
 
 :in.of notch 
 
 Lln.of notch 
 
 :per sq.in. 
 
 -30° C. 
 
 ! 35.900 
 
 3.15 
 
 0.593 
 
 1 3.300 
 
 
 : Bakelite 
 : 16303 
 
 38,000 
 
 . 29,600 
 
 : 36,100 
 
 3.12 
 
 : -593 
 
 : 3.600 
 
 -25 c. 
 
 Recinox 
 
 3^,300 
 
 . 27,500 
 
 : 33.000 
 
 3.16 
 
 ! -597 
 
 : 
 
 
 Bakelite 
 16303 
 
 3^,300 
 
 . 27 , 500 
 
 33.000 
 
 3. 18 
 
 .596 
 
 
 25° C. 
 
 Recinox 
 U65 
 
 28,200 
 
 23 , Uoo 
 
 29,200 
 
 3-3? 
 
 .610 
 
 . 2 , 4Uo 
 
 
 Bakelite 
 16303 
 
 28,200 
 
 22,600 
 
 28,700 
 
 3.28 
 
 .600 
 
 2,UUo 
 
 100° C : 
 
 Resinox ! 
 U65 
 
 17.500 
 
 15, ^00 
 
 22,600 
 
 3.17 
 
 .072 
 
 1,860 
 
 
 Bakelite. 
 16303 : 
 
 16,700 
 
 13.900 
 
 22,300 
 
 3.13 
 
 .669 
 
 1,86 
 
 150* C. : 
 
 Resinox : 
 
 46^ 1 
 
 12,900 : 
 
 10,200 
 
 15.250: 
 
 2.80 
 
 .543 - 
 
 1.690 
 
 
 Bakelite: 
 16303 : 
 
 10,200 : 
 
 7.700 
 
 17.000: 
 
 2.73 
 
 .1*9 
 
 l/.**0 
 
 Miraeo. No. 1321