VFI®-7101 4 PCF Flexible Polyurethane Foam

Mold Preparation 

Molding material must be sealed and released to prevent unwanted adhesion. We recommend using a wax-based release or a similar release agent for the best results. Do not use a silicone-based release, as this will collapse the foam.

The mold must be strong enough to hold shape if subject to packing pressure. Compatible molds for casting include aluminum. Do not use a silicone mold or free-rise mold. We typically do not recommend overpacking more than 2 times the original PCF. To hit your yield and speed up the demold time, you must use a heated mold up to 100°F. However, heating the mold will also decrease the pot life and final density.

Mixing

The material should be brought to a minimum temperature of 65°F before use. Premix the B side (Poly) until uniform before combining with the A side (Iso). Pour the measured B side into the measured A side and mix rapidly with a drill or power mixer. Move the mixer through the center and side of the mixing container until uniform. The material must be thoroughly mixed before the 15-second cream time (initial rise). You can continue to mix as you pour it into the mold or form.

Pouring & Curing 

The material should be poured immediately into the lowest point of the mold or form. Avoid scraping material from the container while pouring because the material may not be fully mixed. Be careful when overpacking due to the force that the foam will generate. If your mold is not strong enough, it will break.

Once poured, the mold should not be moved while the foam rises since movement could cause cells to collapse. To prevent deformation, allow the foam to remain in the mold or form until fully cured. VFI-7101 should be allowed to cure for at least 2 hours at room temperature before removing it from the mold.

Cleanup 

Clean application equipment with MEK or xylene before the foam cures. If the foam has cured, you can break it off the surface and wipe the rest off with xylene.

Storage/Shelf Life 

The material should be stored in a clean, dry building between 60°F – 90°F. It does not have to be protected from freezing. The shelf life from the date of manufacture is 6 months for the A side and 12 months for the B side. Opened containers can be resealed with a nitrogen purge immediately after use.

Precautions

VFI-7101 contains isocyanate, which can be irritating to the skin and toxic if inhaled as particulate matter. Avoid prolonged breathing of vapors and repeated skin contact using proper personal protective equipment. Use only with adequate ventilation. It is not UV color stable and has no long-term UV testing. It is not fire retardant and is unstable in water. Do not thin or add foreign material to the product. See the Safety Data Sheet for complete safety information and follow all precautions/directions.