H.B. Fuller HL 2591

Identification

Chemical Family

Polyurethanes (PU)

GBU

HHC

RTU Product Type

Hot Melt Adhesive,

1K (1 component) Adhesive,

Reactive Adhesive

Categories

Technologies → Adhesives & Sealants → Product Families → Bonding Technology → 1K Liquid Reactive Adhesives

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

Applications

Application Method

Roller,

Nozzle

Compatible Substrates & Surfaces

Polyethylene Terephthalate (PET)

Segment

Tapes, Labels, and Graphics

Applications & Uses

Instructions

Bonding surface preparation: The bonding surface needs to be clean, dry and oil-free

• Polyolefin materials must be subjected to electrical or oxidation pretreatment.
• Such materials must be pre-treated with a suitable cleaning agent or primer.

Preparation: unloader, heating plate, delivery pipe, pump, and gun head must be equipped with

• Set the appropriate temperature. Too high a temperature will cause the glue to decompose.
• The structure of the equipment, heating plate, conveying pipe and pump are set to a temperature within 180 enough.

When applying with a nozzle or roller, bonding must be done immediately.

• Cold will cause the glue to peel off and greatly shorten the opening time.
• It is recommended to preheat the substrate.

It is recommended to use it all at once after opening the package.

Features

Ready-to-Use Product Features

Good Bonding Strength

Packaging & Availability

Regional Availability

• North America

Physical Properties

Physical Form

Solid

Properties

Typical Properties

	Value	Units	Test Method / Conditions
Glue Coating Thickness (glue coating)	max. 0.3	mm	-
Recommended Glue Temperature (for roller coating)	130	°C	-
Recommended Operating Temperature	175 - 180	°C	-
Recommended Tank Temperature (for spraying)	approx. 120	°C	-
Recommended Tank Temperature (for spraying, nozzle)	approx. 180	°C	-
Recommended Tank Temperature (for spraying, throat)	approx. 170	°C	-
Viscosity (at 130°C, spindle 27)	10000	mPa.s	Brookfield BF DV-11

Storage & Handling

Storage Conditions

• Keep in a closed container away from direct sunlight.
• Validity period: 6 months for composite aluminum foil bag; 9 months for drum; Install for 12 months.

Shelf Life

6 - 12 months

Technical Details & Test Data

Curing Conditions

In order to achieve complete curing, the composite product should be stored at a suitable temperature and humidity (for example: 25 temperature and 50% RH humidity, or If the film thickness is 0.5 mm or less, under suitable conditions at low temperatures and humidity, the curing will be completed within 7 days. It takes a long time to fully cure. The curing rate and completion of curing will vary with the film. Varies depending on thickness and substrate permeability.