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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 Green Booster/Amplifier

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MATSUI DRYER M/N: DMZ-240 & S/S INSULATED HOPPER

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PLASTIC ADDITIVE MICRO FEEDER-B175

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New SPEEDRYER 50 lb/hr thermodynamic hopper dryer

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NEW McElroy No.14 Pipe Fusion Machine Welder HDPE PE

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

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Mecasonic Ultrasonic Rotation Welder Omega II

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Thermal Care Water Coolded Chiller

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LEISTER GHIBLI PLASTIC WELDER HEAT GUN with 200+ rods

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McElroy No.2LC Pipe Fusion Welder Machine Tool Plastic

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Branson 8400 - 900 Watt Plastic Ultrasonic Welder !!

$3250.00
Brand New Heavy Duty Industrial Granulator

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StopCock Two Way Shut Off Valve Valves with Hose Barbs

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McElroy Sidewall Fusing Machine w/Heater Iron

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Forsthoff Quick LE Heat Welding Hot Air Leister Gun New

$369.00
McElroy 1-1/4" - 2" Fusing Machine w/Heater Iron

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PLASTICS SIGHT GLASS LOADER-MODEL C1K

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Conair plastic filter units

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BRANSON 900 SERIES ULTRASONIC WELDER MODEL 921

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plastic pellet dryer/dessicator

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Plastics dryer vacuum conveyors dhd-4 unadyn filters

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Conair Wortex Plastic Granulator LP-330 GRINDER

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Electrofusion Control Box

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BRANSON ULTRASONIC PLASTIC WELDER MODEL 8400

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PVC plastic bars grey

$19.00
ConAir TrueBlend 3 Station Mixer & Hopper, + Controls

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CINCINNATI MILACRON SCREW MOTOR VISTA 440 550 TON

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Temperature controller Sterlco M8424 water

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Hot oil temperature controller advantage regal rdo-1230

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Mini-Weld Model 5 Airless Plastic Welder 5500HT USC

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LEISTER CH-6060 HOT HEAT GUN PLASTIC WELDER ROOFING

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RF Welder Kabar 6-8KW RF Heat Sealer

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BRANSON 920IW+ plastic welder PARTS UNIT +900M parts

$51.00
BRANSON ULTRASONIC WELDER 910IW Sonic Plastic Bonder

$2200.00
LEISTER 3000 HOT AIR GUN/WELDER TOOL,120V,1200 DEGREE F

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Quick-LE Hot Air Welder Plastic Repair Kit

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Extrusion Stainless Steel Cooling Tank w/pump, 2063 WH

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Moeller Devicon Ultrasonic Welder - Sealer - Packaging

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40 Khtz Ultrasonic welding hand probe Dukane new

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230100 Sentra Controller Power Module w/ Interface Card

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LOT *2* MCELROY MINI MC MINIMC PIPE FUSION w/HEATER NR!

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USED RF HEAT SEALING MACHINE - 1KW HALL DIELECTRIC

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Sonic welding horn 730-001-021

$2.25
Urethene Mini Weld Model 5 5500HT Airless Plastic Welde

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AEC Whitlock Dust Collector VFCA-351, #1938 WH

$9.95
HOT AIR TYPE K-NULL-R PLASTIC WELDING GUN

$148.99
30HP NELMOR PLASTIC GRANULATOR MODEL 1620 YEAR 1999

$7900.00
Branson welding actuator 921AOS Plastics

$390.00
230100 Sentra Controller Power Module w/ Interface Card

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McElroy "Mini Mac" Plastic Fusing Kit w/Heater Iron

$169.99
Thermatron F10-55 RF Heat Sealer

$5000.00
BRAND NEW HEAVY DUTY INDUSTRIAL GRANULATOR (20 HP)

$7495.00
BULK PLASTIC DRYER, MIXER

$500.00
Dryer for Plastic Injection Molding (Quad-Unit)

$1675.00
MCELROY PITBULL #14 PIPE FUSION MACHINE *worksgr8* NR

$1295.00
MSI Contols APEX-6 6 Zone Mold Controller Multi Phase

$399.00
B200 POSIMAX ADDITIVE FEEDER-NEW

$1500.00
Branson 901 AES Ultrasonic Welder Actuator 1000 Watt

$1499.99
PulseCooling UNIT FOR PLASTIC INJECTION MOLDING COOLER

$1499.95
TUC Thermolator

$300.00
RF Welder Thermatron 15 KW

$25500.00
DUKANE ULTRASONIC WELDER 92390 43B18 Plastic Bonder

$1500.00
Conair DL 25 Dryer/Hopper

$600.00
3 Boxes Seelye Thermoplastic Welding Rod 1/8" x 36"

$9.99
Branson 8400 Ultrasonic Welder 800 series (used)

$1500.00
(3) Vacuum loaders , una-dyn protec mann hummel 7.5 hp

$5650.00
Branson Ultrasonic Welder Series 900 MDL 910 IW

$1799.98
BALL & JEWEL 8x12 5 H.P. GRANULATOR M/N: CG-812-SOSX

$1295.00
BRANSON ULTRASONIC 941 AES WELDER & 947MA CONTROLLER

$1299.99
AEC WHITLOCK WD-100Q DESICANT PLASTIC MATERIAL DRYER

$799.99
Temperature Controllers Sterlco Plastics

$450.00
WAAGE ROUND DIP COATING POT 1 QT. - NEW

$0.99
McElroy No. 14 Pipe Fusion Welder Machine Tool Plastic

$1800.00
RF Welder 10 KW w/ 84" 4-Station Turntable

$20000.00
Aluminum 40 Khtz Ultrasonic welding horn Dukane

$19.99
RF Welder Cosmos 10-15KW with Rotarty Indexer

$23500.00
Lot of 10 Chrome Plated Brass 1/8 NPT Mini Ball Valves

$15.00
Ultrasonic piezoelectric crystal - PTZ 4

$5.00
AUTOHOPPER vacuum loader

$1195.00
Sterlco Dual Zone Temperature Controller

$595.00
RF Welder A & G 10KW RF Heat Sealer

$12500.00
SONOBOND sureWeld 20 ultrasonic Plastic WELDER clean

$750.00
Leister Triac S Hot Air Blower Heat Gun Plastic Welder

$1.00
Daikin chiller PCB AKZ306 DHA00794F

$380.00