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Pretreatment
Pretreatment of Joint Surfaces
The strength and durability of a bonded joint depends on the condition of the surfaces to which the adhesive is applied. Different pretreatments are required to prepare different materials for bonding.
The table entitled "Pretreatment of Materials" shows the most commonly employed pretreatment in the first column and the optimal pretreatment in the second.
The letter code used is as follows:
| A |
remove all dust |
| B |
degrease using solvents such as trichloroethylene, perchloroethylene or trichloromethane |
| C |
abrade (brushing, grinding or sandblasting) |
| D |
corona discharge technique |
| E |
pickle |
For full details consult your local Polymer Engineering Representative
| Material to be Bonded |
Common Pretreatment |
Optimum Pretreatment |
| metals (excluding zinc) |
B+C |
B+E |
| zinc and galvanized metals |
B+C |
B+E |
| hard alloys |
B |
B+E |
| glass, quartz, precious stones |
B |
B+C |
| porcelain, china, ceramics |
B |
B+C |
| concrete, asbestos, cement, plaster |
A,C |
E |
| graphite and carbon |
A,C |
E |
| ferrite magnets |
B |
B+C |
| wood, particle board, etc. |
A |
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| rubber |
B+C |
B+E |
| leather |
A |
B+C |
| polymethly methacrylate (Plexiglas), ABS, polystyrene, PTFE (Teflon), polyacetal (Delrin), rigid PVC, polyamide (Nylon), etc. |
C+A |
E |
| polyethylene, polypropylene |
D+E |
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| phenol formaldehyde, melamine formaldehyde
and urea formaldehyde resins and epoxy resins |
B+C |
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| PUR, PVC and phenolic resins foams |
A |
C+A |
| polystyrene foams |
A |
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| decorative laminate |
A |
B |
| fiber-reinforced polyester, epoxy or phenolic resins |
B+C |
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