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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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Leister automatic hot air welder roof seamer 80-120mm
$3999.00
COOLING FAN 110V VOLT AC 208 MM X 72 MM A20872V1HBL NEW
$79.99
Branson Ultrasonic Weld Horn Converter
$152.50
McElroy Pipe Fusion Welder Machine Tool Plastic Facer
$299.00
5 HP Plastics Grinder
$0.99
Brand New Heavy Duty Industrial Granulator
$1495.00
GUILLOTINE 5' WIDE
$11500.00
Refurbished Nelmor G810M1 granulator, 460v, 5hp grinder
$1000.00
NOVATEC DRYER MDM-50
$5000.00
Enfield Enfusion Pipe Fusing Electrofusion Fusion Weld
$1150.00
Avalon Safety Cycle 2 Vision System
$2350.00
Conair Franklin Desiccant Plastics Dryer D60A 460/3/60
$399.99
MCELROY PITBULL #14 PIPE FUSION MACHINE *worksgr8* NR
$795.00
SMC LVA, High Purity Air Operated Single Valve L@@K
$9.50
Advantage Zone Temperature Controller S-925 Water
$200.00
Con-Air Dustbeater Vacume Type With Electronic Controls
$199.99
HANDHELD CLAM SHELL SEALER TOOL MODEL 772 - NEW IN BOX
$51.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #10
$50.00
ADVANTAGE TEMPERATURE CONTROLER 3/4 HP
$150.00
Branson Ultrasonic 902J Converter 20kHz Tested Tested
$0.99
SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV
$54.49
McElroy Pipe Fusion Welder Machine Tool Plastic Heater
$299.00
Foremost HD-6 10 HP 14x18 Plastic Granulator Grinder
$3500.00
ENFIELD ENFUSION PIPE FUSING ELECTROFUSION FUSION WELD
$895.00
United Silicone Hot Stamping foil transfer machine
$11500.00
20 Khtz Ultrasonic welding probe Dukane
$199.00
KAMWELD 47-RW PLASTIC WELDER SELLS FOR $1063.00 L@@K
$250.00
Temperature Controllers Sterlco Plastics
$350.00
Temperature controller Sterlco M8424 water
$320.00
Brand New Heavy Duty Industrial Granulator
$695.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #1
$50.00
MINIATURE FOOT SWITCH 6 FOOT CABLE 15A NO/NC OUTPUT NEW
$24.99
GSR FU-1200 PLASTIC PIPE FUSION WELDER CONTROL UNIT NR
$195.00
Plastic Grinder 12"
$150.00
COOLING FANS 12V VOLT DC 120 MM X 38 MM NEW LOT OF 2
$49.99
Auto Load AL-1525 Single Outlet Compressed Air Loader
$600.00
NOVATEC VACUUM PUMP 15 HP FOR PLASTCS
$3200.00
ROTRON,VACUUM/BLOWER
$188.00
Branson Ultrasonic Welder Series 900 MDL 910 IW
$1799.98
Branson 910iw Ultrasonic Plastic Welder Series 900
$2300.00
Zapper PW10 Ultrasonic Plastics Welder - Almost New
$3499.00
Sterlco Temperature Control Unit Injection Molding
$850.00
Conair plastic filter units
$450.00
HPM 8" EXTRUDER 40:1
$120000.00
IMS PLASTIC GRANULATOR 5 HP
$400.00
Kidder EMX2 Plastic Bending Strip Heater Bender MINT
$68.50
FORSTHOFF QUICK L HEAT WELDING HOT AIR GUN EXC COND
$99.99
ADVANTAGE 600 GAL TOWER TANK 5 HP 10 HP PUMP
$1200.00
Klinger Motion Master 2000RX 4-Axis Motor Controller
$237.00
Piovan Dryer Model CDN1/2/2
$3250.00
BERINGER 6" HYDRAULIC SLIDE PLATE SCREEN CHANGER UNIT
$249.00
DUKANE ULTRASONIC WELDER MODEL 43D255
$199.95
Inclined Barrel Mixer for plastics Foremost Machine
$750.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #2
$50.00
SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV
$54.49
Plastics dryer vacuum conveyors dhd-4 unadyn filters
$4750.00
VERY NICE BRY-AIR SYSTEMS DESICCANT DRYER MODEL RM-200
$2990.00
6" GLOUCESTER FOAM EXTRUDER WITH DOWN STREAM EQUIPMENT
$10000.00
Sakas traveling cross cut saw
$950.00
Thermosonics P-330 Ultrasonic Welder and Power Supply
$750.00
3 Boxes Seelye Thermoplastic Welding Rod 1/8" x 36"
$9.99
TOSHIBA INJECTION MOLDING MACHINE HY MOTOR 380/190/190
$7500.00
Lot of 10 Chrome Plated Brass 1/8 NPT Mini Ball Valves
$15.00
NISSUI SA35 SCREENLESS GRANULATOR
$3800.00
TUC Thermolator
$150.00
Branson welding actuator 921AOS Plastics
$390.00
Central BS-4 Pipe Fusion Plastic Welder Mcelroy Machine
$799.99
Hot oil temperature controller advantage regal rdo-1230
$2750.00
Oil Heater - Thermal Care/Mayer- 9KW
$1250.00
GEAR BOX davis standard blue ribbon 2 1/2 " gearbox
$9700.00
3.250" COMPOUND/PELLETIZING EXTRUSION LINE
$15500.00
Mecasonic Ultrasonic Rotation Welder Omega II
$1300.00
Thermal Care Air Cooled Chiller
$2350.00
ALPS SX-3 Leak Detector inline 3 Stations 60-80BPM
$2100.00
MATSUI DRYER M/N: DMZ-240 & S/S INSULATED HOPPER
$3995.00
IMS PLASTIC GRANULATOR 7 1/2 HP # LP 86
$1400.00
DELTA T SYSTEMS TEMPERATURE CONTROL UNIT #9
$50.00