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Plastics

Auxiliary Process Equipment

Auxiliary Process Equipment Article

polymer that was critical to the war effort was "synthetic rubber", which was produced in a variety of forms. Synthetic rubbers are not plastics. Synthetic rubbers are elastic materials.

The first synthetic rubber polymer was obtained by Lebedev in 1910. Practical synthetic rubber grew out of studies published in 1930 written independently by American Wallace Carothers, Russian scientist Lebedev and the German scientist Hermann Staudinger. These studies led in 1931 to one of the first successful synthetic rubbers, known as "neoprene", which was developed at DuPont under the direction of E.K. Bolton. Neoprene is highly resistant to heat and chemicals such as oil and gasoline, and is used in fuel hoses and as an insulating material in machinery.

In 1935, German chemists synthesized the first of a series of synthetic rubbers known as "Buna rubbers". These were "copolymers", meaning that their polymers were made up from not one but two monomers, in alternating sequence. One such Buna rubber, known as "GR-S" (Government Rubber Styrene), is a copolymer of butadiene and styrene, became the basis for U.S. synthetic rubber production during World War II.

Worldwide natural rubber supplies were limited and by mid-1942 most of the rubber-producing regions were under Japanese control. Military trucks needed rubber for tires, and rubber was used in almost every other war machine. The U.S. government launched a major (and largely secret) effort to develop and refine synthetic rubber. A principal scientist involved with the effort was Edward Robbins.

By 1944 a total of 50 factories were manufacturing it, pouring out a volume of the material twice that of the world's natural rubber production before the beginning of the war.

After the war, natural rubber plantations no longer had a stranglehold on rubber supplies, particularly after chemists learned to synthesize isoprene. GR-S remains the primary synthetic rubber for the manufacture of tires.

Synthetic rubber would also play an important part in the space race and nuclear arms race. Solid rockets used during World War II used nitrocellulose explosives for propellants, but it was impractical and dangerous to make such rockets very big.

Auxiliary Process Equipment Items

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BRANSON ULTRASONIC WELDER POWER SUPPLY 943M 900 SERIES

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Branson 900 AESAOS ultrasonic manual book900901/921/941

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VERY NICE BRY-AIR SYSTEMS DESICCANT DRYER MODEL RM-200

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TOSHIBA INJECTION MOLDING MACHINE HY MOTOR 150 /75/75

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RF Welder Hall Dielectric Bar Sealer RF Heat Sealr 10KW

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Reliance Electric GP 2000 A/C VS Drive

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Nelmor grinder 20 HP motor 3 blade rotor

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1-1/2"HOPPER FEED AUGER SCREW/EXTRUDER/MIXER FUEL/STOVE

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MPG PLASTIC GRANULATOR, CYCLONE, CUMBERLAND GRINDER

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Branson 1300P manual book ultrasonic

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HOT RUNNER CONTROLLER, SINGLE ZONE

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VERY NICE CONAIR COMPU-DRY DRYER W/ NOVATECH NPH-HOPPER

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RF Welder A & G 10KW RF Heat Sealer

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MATSUI MOLD TEMPERATURE CONTROLLER

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Color Touch Screen Man Machine Interface MMI Dukane

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IMS Plastic Granulator / Grinder, 2HP * Works Great *

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EIGHT (8) 1986 WORTEX 5 HP PLASTIC RESIN GRANULATOR

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Brand New Heavy Duty Industrial Granulator

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2007 UNA-DYN 200 CFM DEHUMIDIFYING GAS HOPPER DRYER

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EMI PARTS CONVEYOR MODEL RM.24.5.20

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Coolant Control Unit holding mold face temperature 2ยบ F

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McElroy no.2cu Pipe Fusion Plastic Welder Machine

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Dukane Ultrasonic Welder Multiplexor

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Bry-Air 100 cfm Desiccant Dryer

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Mecasonic Ultrasonic Rotation Welder Omega II

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AUTOHOPPER vacuum loader

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Sterl Tronics Temperature Controller, G9310-FOX

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Flexicon super sack iris valve

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ADVANTAGE WATER MOLD TEMP CONTROLLER 48 KW * 460 VOLT

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Dryer for Plastic Injection Molding (Quad-Unit)

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Sterlco M2B temperature control station

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TEMPTEK WATER TEMPERATURE CONTROLLER 3/4 HP MODEL T-275

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