goodyear dedicates research laboratory
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Goodyear Dedicates Research Laboratory
Goodyear's new research laboratory. Completion o f the building was delayed b y a tornado which r ipped off the roof and caused other damage
N E W laboratory, one of the finest in ~^^ the world devoted to rubber research, was dedicated late in June a t Akron, Ohio, by the Goodyear Tire and Rubber Co. The opening of the laboratory was celebrated with a, three-day dedication program which entailed a symposium o n rubber problems and the announcement of several n e w technical developments. Built and equipped at a cost of SI,325,000, the new facilities give t o the Goodyear scientists some of the finest and most complete equipment ever assembled for rubber investigations.
As though signaling the developments t o come from th i s laboratory, the company announced and demonstrated five new technically important items. First of these was a supersonic sound machine which is used to detect flaws in tires for retreading which, x-rays cannot show; second was the announcement of Plioflex, a vinyl-vinylidiene chloride copolymer which is serving as a rubber substitute; the third development, removed from the field of chemistry, concerns a new radio static neutralizes which wil l eliminate static due t o atmospheric or man-made machines; fourth was a new process d e veloped jointly with t h e Chrysler Corp. for joining together structural members with a new adhesive, stronger bonds re sulting than are obtainable with welding
By F. J. V A N ANTWERPEN Associate Editor
o r riveting; andl lastly Resinfoam, a n e w plastic insulation material.
Cycleweld Process The currently outstanding deve lop
ment was the Cycleweld process a n d little was permitted said b y Army officials. The composition of the material was n o t revealed but it is a plastic c e ment. T h e Cycleweld is sprayed o r painted on w o o d or metal and t h e t w o treated surfaces are pressed together under heat and pressure. T h i s causes tfaie films t o adhere, probably through polymerization, and the resulting bond is considerably stronger than joints made fcy conventional methods.
Cycleweld is a thick, v iscous , black solution and it i s set by temperatures of 325 F - I t i s a l s o used to bond synthet ic rubber to m e t a l s and plastics.
In t h e case o f metal-to-metal bond, t n e cement has b e e n developed in t h e form of a film or t a p e . I t is merely necessaxy t o place th is t a p e between t h e parts to >e bonded toge ther and apply hea t a n d pressure.
Tests of stremgth show n o t on ly t h a t the bond is stronger than -the riveted or
welded joint, b u t that; the wood or metal g ive way before the Cycleweld Sieam.
T h e process o f bonding m e t a l to naetal lends itself particularly to the production of l ight sheet alloy parts such as small parts made from aluminum o r magn-s ium.
Stat ic Eliminator
Spectacular, too, w a s the static elimina-tor developed by Goodyear through their interest in blimps and other air-craft and proper radio reception. The demonstration given to t f ie press repre-sentatives consisted of impinging apon the antenna of a conventional radio re-ceiver a spark from a co i l wich gave stat ic currents several thousand times as powerful a s the normal radio signal. The resulting stat ic was deafening. When the eliminator was connected, however, the distortion caused by the spark was barely audible. T h e details are again voider secrecy, b u t the allowable information was as follows:
T h e neutralizer makes use of ssmail electronic tubes in such a way that "they are automatically adjusted to each zradio signal, whether weak or strong. T h e y serve to discriminate between stat ic and the desired signal and automatically con-trol the a m o u n t of s ta t i c energy \*rhich can pass through the radio.
1056 C H E M I C A L A N D E N G I N E E R I N G N E W S
A detect ion control circuit eliminates s tat ic which is louder than the incoming signal, even in cases where the static is s o loud aa to obliterate t h e incoming signal entirely under ordinary circumstances.
I n tests a t the Goodyear company, the device eliminated extreme static of high recurrent pulse frequency such as that caused by t h e ignition system of an air-plane engine or an electric razor.
I n one tes t , a 25,000 volt spark from the ignition s y s t e m of an engine was pro-jected directly upon the antenna of a re-ceiving set. The neutralizer eliminated this so effectively that it was possible t o tune in a short-wave radio program from Europe.
I n addition; the neutralizer also gets rid of s ta t i c that is on the same frequency as the incoming signal. This is done b y means of a circuit which uses the energy of t h e static t o build up an electronic cur-rent of opposite electrical sign. This cur-rent then neutralizes the static so that i t has no effect upon the signal.
T h e device is expected to improve the performance of radar and find immediate application b y the armed forces in fighter planes, warships, and tanks.
Supersonic Tire Tester T h e other device to come from Good-
year physics research was the supersonic tire tester. This was developed t o sup-plement x-rays in the inspection of tires for retreading. Often tires have ply sepa-rations and a short t ime after retreading the tire fails, causing a waste of rubber. X-rays ? because of their nature, do not reveal such defects .
I n operation of the supersonic device the tire is hung o n two rollers in such a w a y tha t the bottom portion of the tire passes through a shallow tank of water. Sound waves of supersonic frequency are generated in this tank of water b y the vibration of a nickel rod. This rod is
Dr. L. B. Sebrell, manager of research and new products, was deluged with ques-tions at the dedication press conference.
set in vibration by means of a high fre-quency electric current which passes through a coil of wire surrounding the rod.
The vibrations so generated are picked up b y a microphone which is mounted so as t o be a lways inside the portion of the tire which is immersed in the water. The microphone in turn operates a relay box equipped with a red and green light.
A s long as the tire is solid, the super-sonic vibrations pass through with full intensity to the microphone and the green light stays lit. However, if there is separation in the tire, the supersonic waves do not pass through with full in-tensity as they are reflected back b y the air gap. This causes the green light to be extinguished and the red light to glow. In this way the operator of the machine is able to determine whether or not the tire is suitable for retreading and in ad-dition knows the location of the defect.
Plastic Foam Plastic Foam is Goodyear'"s wartime
replacement for Airfoam, spoage rubber insulator widely used by thie aircraft manufacturers a s a wing filler. The shortage of natural latex maJces i t im-possible to continue t h e irtanufacture of the sponge rubber and a subst i tute has been worked out by t b e Goodyear chem-ists.
The production steps i n making the resins are a s follows: the resin, a urea formaldehyde, i s mixed with a foaming agent, a condensing agen-t, and water. The mixture passes to a, reactor, or foaming unit, where it is frothed, presum-ably b y mixing and air incorporation. The frothy mixture i s then s e t by heat and dried i n a further operation by high-frequency radio drying. Tl ie Plastic Foam is then c u t into blocks ajnd, where greater rigidity i s needed, imtpregnated. Alone the Plastic Foam is not very strong. Reinforced with fabric the plain type product is sufficiently strong for handling, but i s somewhat susceptible t o shock. The resilience o f t l ie impreg-nated type is increased and fragility de-creased by adding a flexible substance.
Plastic Foam i s now beixig -turned out i n limited quantities for Arnxy airplane insulation. It i s highly resistant t o the transfer of heat and i s in addition non-flammable and waterproof. It weighs 0.65 pound per cubic foot and is l ighter than balsa, Airfoam, o r any other known insulation.
The new Goodyear rubber substitute, Plioflex, owes i t s importance -to the fact that i t can be vulcanized lilce rubber-I n this respect i t thereby becomes su-perior to many o f the plastics now used i n rubber replacement. Most of the plastic rubber substitutes are thermo-
i e f f . G i lber t J. C- Andresin demonstrates the static eliminator Right. Goodyear's supersonic t i re tester is demonstrated by W . E. developed as an a id to airplane radio reception. I t has possi- Morris of the research laboratory. This device, supplementing x-rays and bilities in improving radar and radio transmission of pictures, visual inspection, wil l determine t h e suitability of a tire for retreading.
V O L U M E 2 1 , N O . 1 3 J U L Y 1 0 , 1 9 4 3 1 0 5 7
- Goodyear's home of the future. Postwar may see homes such as shown here, produced by assembly line methods. Less than 2 tons, they may easily be loaded on trucks or fiat cars. The sides, for moving, will b e telescoped to the interior, makins a packas
rings for heavy Army tanks. The com-pany subsidiary, Goodyear Aircraft Corp., which manages "the air activities now em-ploys about 31,000 persons. It produces in addition to t b e Corsair: wings and tail surfaces for medium bombers; tail surfaces for torpedo planes; outer-wing panels; floats and flight decks for flying boats; wings and tail surfaces for pursuit ships and scout bombers; U-boat-hunting K-ships; blimps for coastal patrol; and many other aircraft products vital to the needs of a nation at war.
Well known t o the chemical fraternity are Pliofilm, Airf oam, Pliolite, Che