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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 Series 900 MDL 910 IW
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Daikin chiller PCB AKZ306 DHA00794F
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Zapper PW10 Ultrasonic Plastics Welder - Almost New
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Conair plastic filter units
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Branson Ultrasonic Weld Horn Converter
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Branson welding actuator 921AOS Plastics
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DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #1
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5 HP Plastics Grinder
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Brand New Heavy Duty Industrial Granulator
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Hot oil temperature controller advantage regal rdo-1230
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HPM 8" EXTRUDER 40:1
$120000.00
MCELROY PITBULL #14 PIPE FUSION MACHINE *worksgr8* NR
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ROTRON,VACUUM/BLOWER
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Temperature Controllers Sterlco Plastics
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COOLING FANS 12V VOLT DC 120 MM X 38 MM NEW LOT OF 2
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Lot of 10 Chrome Plated Brass 1/8 NPT Mini Ball Valves
$15.00
MATSUI DRYER M/N: DMZ-240 & S/S INSULATED HOPPER
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NOVATEC DRYER MDM-50
$5000.00
IMS PLASTIC GRANULATOR 7 1/2 HP # LP 86
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Oil Heater - Thermal Care/Mayer- 9KW
$1250.00
GUILLOTINE 5' WIDE
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IMS PLASTIC GRANULATOR 5 HP
$400.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #10
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3 Boxes Seelye Thermoplastic Welding Rod 1/8" x 36"
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ADVANTAGE TEMPERATURE CONTROLER 3/4 HP
$150.00
GSR FU-1200 PLASTIC PIPE FUSION WELDER CONTROL UNIT NR
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Enfield Enfusion Pipe Fusing Electrofusion Fusion Weld
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KAMWELD 47-RW PLASTIC WELDER SELLS FOR $1063.00 L@@K
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6" GLOUCESTER FOAM EXTRUDER WITH DOWN STREAM EQUIPMENT
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Kidder EMX2 Plastic Bending Strip Heater Bender MINT
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GEAR BOX davis standard blue ribbon 2 1/2 " gearbox
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Avalon Safety Cycle 2 Vision System
$2350.00
VERY NICE BRY-AIR SYSTEMS DESICCANT DRYER MODEL RM-200
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TOSHIBA INJECTION MOLDING MACHINE HY MOTOR 380/190/190
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$3999.00
United Silicone Hot Stamping foil transfer machine
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Mecasonic Ultrasonic Rotation Welder Omega II
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3.250" COMPOUND/PELLETIZING EXTRUSION LINE
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Thermal Care Air Cooled Chiller
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Sakas traveling cross cut saw
$950.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #2
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FORSTHOFF QUICK L HEAT WELDING HOT AIR GUN EXC COND
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BERINGER 6" HYDRAULIC SLIDE PLATE SCREEN CHANGER UNIT
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Plastics dryer vacuum conveyors dhd-4 unadyn filters
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Sterlco Temperature Control Unit Injection Molding
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$1000.00
MINIATURE FOOT SWITCH 6 FOOT CABLE 15A NO/NC OUTPUT NEW
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HANDHELD CLAM SHELL SEALER TOOL MODEL 772 - NEW IN BOX
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20 Khtz Ultrasonic welding probe Dukane
$199.00
Klinger Motion Master 2000RX 4-Axis Motor Controller
$237.00
Con-Air Dustbeater Vacume Type With Electronic Controls
$199.99
SMC LVA, High Purity Air Operated Single Valve L@@K
$9.50
ADVANTAGE 600 GAL TOWER TANK 5 HP 10 HP PUMP
$1200.00
NOVATEC VACUUM PUMP 15 HP FOR PLASTCS
$3200.00
SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV
$54.49
Branson 910iw Ultrasonic Plastic Welder Series 900
$2300.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #9
$50.00
Piovan Dryer Model CDN1/2/2
$3500.00
NISSUI SA35 SCREENLESS GRANULATOR
$3800.00
Central BS-4 Pipe Fusion Plastic Welder Mcelroy Machine
$799.99
Auto Load AL-1525 Single Outlet Compressed Air Loader
$600.00
Inclined Barrel Mixer for plastics Foremost Machine
$750.00
ENFIELD ENFUSION PIPE FUSING ELECTROFUSION FUSION WELD
$895.00
COOLING FAN 110V VOLT AC 208 MM X 72 MM A20872V1HBL NEW
$79.99
Plastic Grinder 12"
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SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV
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Temperature controller Sterlco M8424 water
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ALPS SX-3 Leak Detector inline 3 Stations 60-80BPM
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