Why not cultivate the evolutionary technique in the same way? For example, it may seem strange that a fellow from the power department signs up for an EVOP course. But later it seems less strange when it is learned that he has succeeded in reducing stack temperature by 18° by using the technique. Blessed are those with imagina tion and enthusiasm! Most of the time, that is, and EVOP monitor those instances where enthusiasm can go awry. For example, ex trusion is a tricky business. Dow has a plant with a number of film extruders having some eight heat zones with friction of the screw adding its share of heat. Heat zones and screw r.p.m.'s can be set at a fantastic number of combina tions, and without a definite tech nique for determining optimum set tings, each operator becomes his own expert. Thus, it may not be unusual for the temperature chart and pro duction record of an extruder to show that everything is running smoothly, and then suddenly the log may change drastically—heat on zone 3 may decrease 10°, and that on zone 2 increase 12°. This is puzzling until it is found that the change occurred at the precise time a new operator came on duty. It would be wrong to say that if a plastics molder or an extruder adopts EVOP, his troubles will vanish, but in the Dow plant, it did help. The foreman with his long-term experience believed that specific heat zones were controlling, but could express this only as an opinion. Subsequently EVOP techniques were applied to one machine, im portant zones were identified, and optimum settings were determined. In a short time this machine in creased its output by 2 0 % above other machines. As the study con tinued, yield continued to improve until undesirable characteristics ap peared. At the cutoff point, output had increased by 37%. As is customary in EVOP pro grams, results of this study were posted in the plant, but contrary to expectations, the exemplary ex truder did not become the show horse, production-wise. Rather, all machines showed improvement as the study progressed. Probably {Continued on page 44 A)
A CONDENSED FACT FILE ON EPOXIES BY FMC ΟΧΙ R O N EPOXY RESINS 2 0 0 0 , 2 0 0 1 , 2 0 0 2 lhese ppoxirii7Cil polyolefms have m u l t p l e epoxv and icartive double bonds as reaction sites -Versatile cure thanks to floater reactivity - I owe ι density r i i i v r s ι no τ volume pi-:' pound Uses include i c h f o i c e d plastics. •Klhesivis. surface coalings. poUir.;·,. er-capsuldtin,·'., propellant hinder— Kor the- full sloiy send for: Epoxy Data Booklet
DIEPOXIDES Dicyclopentadiene Dioxide This ilifunctioiinl epoxide can !)c nsoil both .is a modifier for conven tional epiixy resins and as a primary building block for epoxy IOMIIS- Ηιιι vides i t s i n s with ln ; ;h he.it distortion points -formulations .ne liquid and have ;',oo(f pot life. Technical Bulletin No. 9 5 Limonene Dioxide A colorless liquid combining the reactivity of Un internal and an external epoxy (-.roup in the same molecule. Reactive diluent, plc.is-jnt odor and 0"isc of hrindlii'i! are t ha;acb;nstLs- Resin former-itsi'diicd olefin coinhiriiii:.'. loni: chain hydrocarbon structuie with a le.ictive epoxy i.roup. stabilizer tor t.hluruiated pioducts. Technical Bulletin No. 74
D Ο Ο Ο Ο Ο
ALSO T E R P E N E
Ο Ο Ο Ο Ο Ο
:> ο ο ο ·."> ο c· ο ο c ο ο*
OXIDES
Limonene Monoxide Technical Bulletin No. 8 1
Alpha-Pinene Oxide Technical Bulletin No. 8 2
For additional information on these products write for the bulletins mentioned above —
EPOXY DEPARTMENT, FMC CORPORATION 161 E a s t 4 2 n d S t r e e t , N e w Y o r k 17, Ν . Υ . Circle No. 55 on Readers' Service Card VOL. 53, NO. 12 ·
DECEMBER 1961
43A
