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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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HDPE Slipline Pipe Puller Butt Fusion NoReserve McElroy

$100.00
New SPEEDRYER 50 lb/hr thermodynamic hopper dryer

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HOT AIR TYPE K-NULL-R PLASTIC WELDING GUN

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MCELROY 424308 #14 PIPE PE FUSION HEATER IRON 1200W NR

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6 VALVE WATER MANIFOLD SYSTEM

$1.00
Kamweld KS-1 OLD Plastic Welding Tip 5/32" Rod

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

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Branson Aluminium Ultrasonic blue booster

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Forsthoff Quick LE Heat Welding Hot Air Leister Gun New

$369.00
POWERMATIC 3 HEAVY DUTY DRILL PRESS

$500.00
ROTRON,VACUUM/BLOWER

$327.00
BRANSON ECI-1 COMMUNICATIONS INTERFACE

$45.00
ConAir TrueBlend 3 Station Mixer & Hopper, + Controls

$4200.00
MCELROY PITBULL #14 PIPE FUSION MACHINE *worksgr8* NR

$995.00
Pillar Industries CYCLE DYNE RF Generators Model #AA-10

$1199.00
Kamweld Hot Air Plastic Welder System with Welding Tips

$31.00
DUKANE ULTRASONIC WELDER 94990 3A255 62416 (NO RESERVE!

$499.95
Primus-Sievert PS 2001 heat-welding gun

$199.99
ALPS SX-3 Leak Detector inline 3 Stations 60-80BPM

$4500.00
RF Welder Cosmos 10-15KW with Rotarty Indexer

$23500.00
AUTOHOPPER vacuum loader

$1195.00
Branson Ultrasonic Welder Power 900D

$202.50
Van Dorn 300ton Injection Molding Machine

$1500.00
Foremost AHD-6 15 HP 14x18 Plastic Granulator Grinder

$6900.00
Branson Aluminium green ultrasonic booster

$40.00
BRANSON ULTRASONIC PLASTIC WELDER MODEL 8400

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Foremost HD-6 10 HP 14x18 Plastic Granulator Grinder

$3800.00
Kamweld KS-1 OLD Plastic Welding Tip 5/32" Rod

$10.50
MINIATURE FOOT SWITCH 6 FOOT CABLE 15A NO/NC OUTPUT NEW

$24.99
COOLING FANS 12V VOLT DC 120 MM X 38 MM NEW LOT OF 2

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Conair Wortex Plastic Granulator Grinder Model LP-330

$500.00
Branson ultrasonic converter/booster

$250.00
VINTAGE / ANTIQUE PAPER CUTTER - DIAMOND / CHALLENGE

$500.00
Branson 8400 - 900 Watt Plastic Ultrasonic Welder !!

$3250.00
Branson Ultrasonic Welder Series 900 MDL 910 IW

$1799.98
Forsthoff Quick-L Electronic Hot Air Blower - 1600 Watt

$7.50
5 HP Plastic Injection Mold Scrap GRINDER Granulator

$399.00
Branson Ultrasonic 910D Power Supply W/901AE Actuator

$1500.00
ULTRASONIC WELDER HORN & ANVIL

$25.00
RF Welder A & G 10KW RF Heat Sealer

$12500.00
DEMTECH PRO-X EXTRUDER EXTRUSION WELDER PLASTIC WELDING

$800.00
TUC Thermolator

$300.00
Dri-Pac Desiccant Dryer & 150lb Una-Dyn Hopper Plastic

$1199.00
3.250" COMPOUND/PELLETIZING EXTRUSION LINE

$28500.00
Conair Franklin Desiccant Plastics Dryer D60A 460/3/60

$579.99
Thermatron RF Welder Heat Sealer 30kw 6kw

$131000.00
McElroy "Mini Mac" Plastic Fusing Kit w/Heater Iron

$189.99
TOSHIBA INJECTION MOLDING MACHINE HY MOTOR 150 /75/75

$4500.00
IMS MEDIUM DUTY SCRAP GRINDER

$100.00
LEISTER GHIBLI PLASTIC WELDER HEAT GUN with 200+ rods

$200.00
Kamweld KST-1A Plastic Welding Tip 1/8" Triangle Rod

$9.99
NOVATEC MDM-15S Micro Dryer 60 lb Hopper MCD-2000

$950.00
Quick-LE Hot Air Welder Plastic Repair Kit

$84.00
Chicago electric welding system with built-in air motor

$24.99
McElroy 2" Master Insert Set Pipe Fusion Poly 14 NEW!!!

$174.00
McElroy Socket Fusion PE Gas Pipe heater plates Chamfer

$128.19
HEAVY DUTY STEEL TABLE 6'X3'X2' TALL

$200.00
Brand New Heavy Duty Industrial Granulator

$1195.00
CINCINNATI MILACRON SCREW MOTOR VISTA 440 550 TON

$2500.00
RF Welder Thermatron 15 KW

$25500.00
BRANSON ULTRASONIC 941 AES WELDER & 947MA CONTROLLER

$1299.99
Branson 922RA ultrasonic converter

$400.00
Kamweld Plastic Tacking Tip

$10.50
Una-Dyn Process Equipment Air Assembly

$36.00
Daikin chiller PCB AKZ306 DHA00794F

$380.00
Portable Chiller - 23 Ton

$6979.00
McElroy #2 CU PE Fusion Machine

$950.00
SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV

$54.49
Branson Ultrasonic 947DA With 941AES Actuator Welder

$1800.00
GORTON CIRCULAR TABLE MODEL #215-1

$100.00
Thermal Care Air Cooled Chiller

$3000.00
5 HP Ball & Jewell AUGER Granulator GRINDER with Blower

$750.00
HFA UNDER PRESS PARTS DIVERTER 14" X 14" OPENING

$50.00
ADJUSTABLE SPOT COOLER BY EXAIR

$22.50
AEC WATER TEMPERATURE CONTROLLER TCU-100 (1 HP)

$350.00
LEISTER CH-6060 HOT HEAT GUN PLASTIC WELDER ROOFING

$204.50
RF Welder Kabar 6-8KW RF Heat Sealer

$12000.00
LEISTER HEAT GUN WELDER ROOFING 2260 WATT 20.5 A NR!

$9.99
3 HEATER COILS - 2 are Whitlock, spare parts

$9.99
3 Boxes Seelye Thermoplastic Welding Rod 1/8" x 36"

$9.99
DUKANE ULTRASONIC WELDER 92390 43B18 Plastic Bonder

$1500.00
Audion PAC HORIZONTAL MEDICAL BAND HEAT SEALERS 552F

$1599.99
MCELROY #217201 PIPE FUSION MACHINE *gr8cond* NR

$495.00
46MM BUSS KNEADER EXTRUDER

$8000.00
LEISTER CH-6060 HOT HEAT GUN PLASTIC WELDER ROOFING

$220.00
COOLING FAN 110V VOLT AC 208 MM X 72 MM A20872V1HBL NEW

$79.99
KAMWELD KAM WELD THERMO PLASTIC WELDER TORCH 31HT W/RE

$19.99
WHITLOCK MATERIAL DRYER WITH DRYER CYLINDER

$300.00
Kamweld KS-1 Plastic Welding Tip 5/32" Rod

$10.50
McElroy No.14 Pipe Fusion Welder Machine Tool Plastic

$1850.00
Plastic Extrusion Welder Munsch SK-SC - Low Hours -

$2495.00
AIR COMPRESSOR--MEDIUM SIZE 2HP

$150.00
SYNTHETIC WELDER WELDING KIT NYLON PLASTIC PVC ABS ATV

$54.49
Conair DL 25 Dryer/Hopper

$600.00