Hot Melt Adhesive offers deflection resistance.
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Press Release Summary:
PUR-FECT LOK(R) 34-957A polyurethane reactive (PUR), 100% solids, hot melt adhesive has 0/0 rating for flame propagation and smoke generation. Product runs cleanly at temperatures from 250 to 275 degrees F, and provides bond strength in hours. Suitable for vinyl and substrates such as wood, foamed plastics, metals, and high-pressure laminates, recommended application rate is 6 to 10 grams per square ft. Open time ranges from 3 to 7 minutes.Original Press Release:
New, UL-Approved, Polyurethane Adhesive Sets Fast and Runs Cleanly
BRIDGEWATER, NJ-A new, low-temperature, polyurethane reactive (PUR) hot melt adhesive has been formulated for immediate handling strength, fast setting speed and good deflection resistance. Also, this specialty adhesive has achieved UL723 approval from Underwriter's Laboratories with a 0/0 rating for flame propagation and smoke generation. In addition, this product runs cleanly at temperatures from 250 degrees F (121 degrees C) to 275 degrees F (135 degrees C). This 100% solids adhesive provides high heat resistance and bond strength in hours rather than days.
Designated PUR-FECT LOK(R) 34-957A adhesive, the product was designed for vinyl and substrates such as wood, foamed plastics, metals, and high-pressure laminates. For assembly bonding, plant personnel may use a roll coater or slot coater adapted for PUR adhesives to apply this adhesive in a globule or 1/8-inch- (3.175-mm) or more wide bead. Parts require combining via pressure created by nip rolls, pneumatic clamps or a cold press. For panel bonding, the recommended application rate is 6 to 10 grams per square foot (64.58 to 107.64 grams per square meter). For vinyl laminating, an application rate of 1.5 to 2 wet mils is suggested.
With surfaces that are good insulators, the open time ranges from approximately 3 to 7 minutes. For metals, open time may be as short as 3 minutes. When used for assembly bonding, a handling bond is achieved as soon as the adhesive cools.
For more information on PUR-FECT LOK 34-957A adhesive, contact National Starch and Chemical Information Center, One Matrix Drive, Monroe, NJ 08831. Call 1-800-797-4992. Fax 1-609-409-5699. E-mail: nscinquiry@salessupport.com
National Starch and Chemical Company, a member of the ICI Group, headquartered in Bridgewater, NJ, is a worldwide manufacturer of adhesives, specialty polymers, electronic and engineering materials, natural polymers and advanced ingredients, with sales of $2.6 billion.
