From Franklin

Thank you for your inquiry. A bent lamination is the type of application
where our wood glues would most likely creep. Creep generally occurs where
the glue line is under a permanent stress. Some of our wood glues provide a
harder glue line when dry and would be less likely to creep. The wood glues
that provide good creep resistance are Titebond Liquid Hide Glue, Titebond
Extend Wood Glue and Titebond Polyurethane Glue. Titebond III is not a
product that is considered to have good creep resistance. The amount of
success using Titebond III for a bent lamination will depend on the
thickness of the material and the degree of the bend. It is a good idea to
allow the wood glue to reach full strength before releasing from the clamps
when doing a bent lamination. I normally recommend clamping bent
laminations for at least 24 hours. The actual clamp time will depend on the
type of wood, moisture content of the wood, numbers of layers of wood and
conditions in the shop. All these factors will affect the drying time for
the glue. I hope this information is helpful to you.

Sincerely,

Marc Bergdahl
Technical Specialist
Franklin International



"Teamcasa" wrote in message
...
Below is an interesting thread on glue creep.
In furniture making or general woodworking I have never experienced glue
creeping after the glue has set. Yet others (below) have or are concerned
about it.
Has anyone ever seen this situation (other than structural adhesives or
severe heat/abuse)?

Dave


--
Dave said:
Creep is what happens to the wood sandwich as clamping
pressures are applied. Blue tape will hold it most of the time for flat
stock glue ups, it has a hard time when the form includes a bend and
twist.
Unless your bending form incorporates a twist as well as a bend, you
should
not have a problem with creep. If you do, and blue tape will not hold,
(try
it without glue first) apply clamps and cauls to prevent severe creep. Use
clear packing tape on the cauls to prevent the adhesive from sticking to
it.

Alex said:
Okay. That's not my understanding of the term. I think it refers to a
property of the cured glue line. From an engineering dictionary:
:Creep - the dimensional change with time of a material under load.
and from the Franklin Global web site:
What is creep in an adhesive bond?
Creep or cold-flow in an adhesive bond is the deformation of
the bond line under a stress or load over a period of time

Dave said:
Alex, I don't think that applies to furniture making. Structural
materials,
subject to significant pressures and/or vibration and large temperature
fluctuations, maybe. If you are making a glue lamination beam (GLB), that
may have to hold during a fire, then I'd worry about that type of creep.

Andy said:
The most common sense of "glue creep" in woodworking is pretty
much Alex's, but perhaps with 'time' replacing 'load'. Concretely,
it's the phenomenon of having two pieces glued together become non-flush
with one another at the glue line. Most common with white and yellow
glues.



--
Today's mighty oak is just yesterday's nut that held its ground.



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