Peacock utilizes sources for endothermic and exothermic blowing agents to meet your specific requirements. We have successfully engineered solutions for hundreds of product applications over the past 30 years. Endothermic and Exothermic Blowing Agents include Safoams and Ficel.
BLOWING AGENT REFERENCE CHART
Organic Acid/ Carbonate
|Absorbs heat (endothermic) (W-3076, 3217, 3414, 3438, 3544, 4318) Faster cycle and extrusion times||Gives off heat (exothermic) (W-2410, 3952, 3417) Slower cycle and extrusion times|
|Smoother surfaces In line paintable||Rougher surfaces Must age before painting
(2 weeks for outgassing)
No pin holes
|Slight yellow color
Pin holes common
|Most are FDA approved
Small 25 micron cell size
|No FDA (can be slightly toxic)
Larger cells not uniform
|Do not mix with metallic stearates
Do not mix with DOP or plasticizers
|Metallic stearates activate
Can mix with plasticizers
|CODE #||DESCRIPTION||RESIN||DESCRIPTION/ TEMP.|
|W-2410||Cream powder||Most resins except PC, nylon, PET||Azo type best for high molecular weight plastics-large cells, exothermic, (390-450F)|
|W-3952||White powder||Nylon||High temp (420-520F)|
|W-3217||Fine white powder||Styrenics & PVC||Styrene carrier will work in other resins|
|W-3544A-678||Fine white powder||P/C, Nylon, PET||High heat (360-600F)|
|W-3727||White powder||LDPE||Low Temp (280-400F)|
|W-3076||White pellet||“Universal”||PE carrier 70% blowing agent (315-400F)|
|W-3414(3438)||White pellet||P/E, P/P, most resins||PE carrier -similar to W-3076; 50% active. (316F start-full decomposition 360F)|
|W-4318||White pellet||Most resins||PE carrier (320-400F)|
|W-3417||Sodium bicarbonate||Low temp resins only||Unstable and unreliable but low-cost.|
Blend of 25% W-2410 and 75% W-3217 for rigid or flexible vinyls.
Do not use W-3414, W-3217, or W-4318 for long term foam applications where P20 steel is used. Moisture is released in the form of steam that will eventually cause rust and pit the mold. Note that this is not a problem when using small amounts to control sinks.
W-3414 is 35 microns and is a nucleant + blowing agent.
W-3217 is 7 microns and is a nucleant + blowing agent.