TM 5-1940-321-13&P
( 1 ) The solvent is applied using a clean, lint free paper towel as shown in figure
F-7. The towel should be moderately wet with solvent (the towel has sufficient
solvent when it does not drip, but wringing it releases solvent). The solvent is
applied thoroughly to both surfaces to be glued by rubbing briskly with the
solvent dampened towel. After a 5 minute waiting period, the solvent is applied
again: two applications five minutes apart for toluene and three applications
5 minutes apart for MEK.
Figure F-7. Applying Solvent to Prepare Material for Gluing.
( 2 ) Application of the solvent is an important part of the gluing process. The
solvent softens the fabric coating and opens the pores in the material, allowing
it to accept and chemically bond with glue.
( 3 ) Keep solvent containers tightly close. A squeeze bottle of solvent resistant
plastic is normally used to dispense solvent in the work area. The small
opening reduces evaporation, and container lids do not need to be removed
and replaced. Mark the squeeze bottle with the solvent name.
( 4 ) Provide adequate ventilation in the work area. The ventilation system should
provide three complete changes of air each hour. Avoid breathing solvent
vapors. Remove solvent soaked towels from the work area as soon as possible
to reduce the concentration of toxic vapors. Avoid prolonged solvent contact
with the skin. Air extractors should be located at the floor level. Solvent and
glue vapors are heavier than air and will accumulate near the floor.
F-11