H.B. Fuller® BC-641

Identification

GBU

HHC

RTU Product Type

Hot Melt Adhesive

Categories

Markets → Consumer Goods → Applications → Stationery, Art & Office Supplies

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → Hot Melt Nonreactive Adhesives

Applications

Application Area

Brochures,

Paperbacks,

Catalogues,

Telephone Directories

Compatible Substrates & Surfaces

Paper

Segment

Graphic Arts and Bookbinding

Applications & Uses

Application Instructions

Application temperature: 350°F

Suitable Substrates

All paper qualities.

Typical Applications

Graphic Arts: Side gluing of brochures, paperbacks, telephone directories and catalogues with difficult to bond covers. Can also be used for joint gluing applications and some EOL packaging.

Features

Ready-to-Use Product Features

Excellent Melt Stability,

Good Adhesion,

Slow Setting,

High Ink Resistance

Features & Benefits

Product Characteristics

• Slow speed of set
• Good melt stability
• Excellent adhesion properties
• High ink resistance

Packaging & Availability

Regional Availability

• North America

Properties

Typical Properties

	Value	Units	Test Method / Conditions
Application Temperature	350	°F	-
Color (molten)	2 - 6	Gardner	-
Softening Point	157 - 177	°F	Mettler
Storage Temperature	max. 140	°F	-
Viscosity (at 300°F)	4900	cPs	-
Viscosity (at 350°F)	1740 - 2610	cPs	-

Safety & Health

Safety Information

To minimize the risk of burns, we recommend the use of eye protection and protective clothing when working near a hot melt applicator. To minimize the risk of flammable vapors, do not exceed a melt temperature above 400°F. Prevent the build-up of vapors. Extinguish all sources of ignition during hot melt use.

Storage & Handling

Storage Conditions

Clean and dry conditions below 140°F.

Shelf Life

730 days