Teamcasa wrote:
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


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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.



White glue exhibits creep with higher
temperatures. Never seen creep with a yellow glue
(carpenters) and I have made pieces that creep
would be obvious. Also, I have never seen a
mention of creep, except with white glue, in a
table of glues and their properties.