VFI-1678 80 D Injectable Plastic

VFI-1678 80 D Injectable Plastic is a fast-setting, highly durable urethane plastic with a quick demold time to increase part production rates. With a good viscosity for injecting, this material is able to fill molds with little to no air entrapment during the manufacturing process. A high amine content provides the plastic with good temperature stability and chemical resistance, allowing it to be used in a variety of industrial part-making and prototyping applications. Depending on need, VFI-1678 can produce a smooth, glossy or matte finish that is fully paintable when primed or sanded.

Physical Properties	Test Method	Test Results
Hardness Shore D	ASTM D2240	81 D
Tensile Strength	ASTM D638	5,800 psi
Flexural Strength	ASTM D790	4,700 psi
Impact Resistance Notched Izod	ASTM D4812	17.7 ft. lbs/in

Physical Properties

Test Method

Test Results

Hardness Shore D

ASTM D2240

81 D

Tensile Strength

ASTM D638

5,800 psi

Flexural Strength

ASTM D790

4,700 psi

Impact Resistance Notched Izod

ASTM D4812

17.7 ft. lbs/in

Liquid Properties	Test Method	Test Results
Mixed Solids by Volume	ASTM D2697	100%
Mixed Liquid Density	ASTM D2939	9.58 lbs/gal
Specific Gravity A Side	N/A	1.21 g/mL
Specific Gravity B Side	N/A	1.09 g/mL
Specific Gravity Mixed	N/A	1.15 g/mL
Ratio by Volume (A:B)	N/A	1A:1B
Ratio by Weight (A:B)	N/A	100A:88.49B
Viscosity A Side	ASTM D2196	550 cps
Viscosity B Side	ASTM D2196	750 cps
Gel Time	N/A	1 minute
Tack Free	N/A	4 minutes
Demold Time	N/A	5 minutes
Full Cure	N/A	7 days
Flash Point	ASTM D56	A=370°F / B=240°F
Boiling Point (A/B)	N/A	A=400°F / B=530°F
VOC	N/A	0

Thickness Requirements

VFI-1678 does not have a thickness limit, but if the injected part exceeds 5 pounds, we recommend using a different material with a longer working time.

Storage/Shelf Life

Store between 60°F – 90°F in a clean, dry building. The shelf life of unopened containers is 12 months after the date of manufacture. Once open, use it immediately. Both sides must be nitrogen purged to store after opening.

Mold Preparation

The molding surface should be clean and free of oil, dirt, or debris. Seal and release any porous surfaces. A release agent should be used for demolding and to extend the life of the mold. You may heat the mold between 70°F-150°F before injecting for a quicker demold. However, heating above 72°F will also shorten the pot life of the material. Compatible molds include urethane, metal, and platinum silicone when properly prepared.

Mixing

The material should be brought to a minimum temperature of 65°F before use. Premix the B side material (Poly) until uniform. With a short pot life, the recommended application method is to inject the material. A proportioner is required to inject the material into a mold. There is not enough time to vacuum degas the material.

Post-Cure

The casting can be demolded after 5 minutes at room temperature if injected greater than 125 mils thick or 10 minutes if less than 125 mils. Thinner sections or parts may require a longer cure time in the mold. After demolding, allow the material to fully cure at room temperature outside the mold for at least 16 hours. Full physical properties can be achieved in 7 days without post-curing.

Precautions

VFI-1678 contains isocyanate that may irritate the skin and is toxic when inhaled as particulate matter. Avoid prolonged breathing of vapors and repeated skin contact. Use only with adequate ventilation. Do not thin or add foreign material to the product. This product is not UV color stable and has no long-term UV testing. For complete UV stability, it will require a UV-stable topcoat. See Safety Data Sheet for complete safety instructions.