Online Shop

HomeSite MapSearchCheckoutStore TopContact Us

Items:, Value:


 


 

SURFACE PREPARATION Substrates O - Z

Key:
AA=Anaerobic CA=Cyanoacrylate ET=2-Part Epoxy ES=Heat-Cure Epoxy MS=MS-Polymer
TA=Structural Acrylic PT=Two-Part Polyurethane UV-Curable

PASSIVATED ZINC Degrease with isopropanol or suitable solvent. Surface should be clean and dry before bonding. Other surface preparation has very limited results. AA particularly good. ET, ES and TA can also be considered.
PBT Bond as received. This material can be difficult to bond and often requires a high temperature resistant adhesive. ES5741 has been developed especially for bonding PBT.
PEEK Bond as received. Surface preparation has little effect, this can be quite difficult to bond. All adhesives equally poor on this surface.
PET Recommended options are to surface treat these materials either by corona, plasma or
flame treatment. The suitability will be dependent on the size and shape of the parts and
the production line requirements. Once surface treated these surfaces can be bonded
more easily with cyanoacrylate or UV-curable adhesive. If suface preparation has been successful then look to CA or UV for bonding.
PHENOLIC can be bonded “as received” (so no surface preparation is required). Ensure
surfaces are clean and dry. CA, TA, ET, PT can be considered. ES will also bond this material if a customer is able to heat cure.
PLASTER Remove large particles of dust and debris with a stiff brush. Ensure surfaces are as dry and clean as possible and free of oil. MS first choice, particularly for large panels. ET or pre-mix TA could also be used.
POLYCARBONATE can be bonded “as received” (so no surface preparation is required). Beware stress cracking. CA - particularly the non-bloom grades. ET or TA can
also be used (stress cracking with TA could be an issue). UV630 or UV640 are the best choice if the polycarbonate is transparent.
POLYETHYLENE These polyolefin materials can prove challenging to bond due to their low surface energy. Unfortunately these substrates are very common due to their low cost and availability and frequently require bonding. Pretreat – corona, plasma or flame treat prior to bonding. Surface reactivity will decrease over time so bond ASAP after treating. Permabond POP + CA (e.g. 105 or 2050) gives best results. Other adhesive technologies require significant pre-treatment. POP does not work with technology other than CA.
POLYPROPYLENE These polyolefin materials can prove challenging to bond due to their low surface energy. Unfortunately these substrates are very common due to their low cost and availability and frequently require bonding. Pretreat – corona, plasma or flame treat prior to bonding. Surface reactivity will decrease over time so bond ASAP after treating. Permabond POP + CA (e.g. 105 or 2050) gives best results. Other adhesive technologies require significant pre-treatment. POP does not work with technology other than CA.
POLYSTYRENE Bond “as received” (so no surface preparation is required). Ensure surfaces are clean and dry. Beware stress cracking. ET, TA, PT can be considered. CA can attack this substrate.
POLYURETHANE Elastomeric PU can be bonded as received. Rigid PU: abrade and degrease. Some PUs resist abrasion. Elastomeric PU bond with CA. Rigid PU - PT, ET or TA.
PTFE Wipe clean with isopropanol or Permabond Cleaner A. Options for bonding PTFE are fairly limited. The easiest method is to prime with Permabond POP primer and then bond with Permabond 105. Alternatively, you can acid etch with “Tetra Etch” and then bond with epoxy, structural acrylic, cyanoacrylate, UV or anaerobic adhesive. PTFE can also be purchased pre-etched.POP + CA 105. Other adhesive technologies require significant pretreatment. POP does not work with technology other than CA.
PVC Bond “as received” (so no surface preparation is required). Abrasion can help improve
mechanical bond strength. UPVC can be bonded with CA, ET, TA, UV. Flexible PVC restricted to CA, possibly a medical grade UV.
SILICONE Degrease with isopropanol or suitable solvent. Surface should be clean and dry before
bonding. Options for bonding silicone are very limited. The easiest method is to prime with Permabond POP primer and then bond with Permabond 105 or 731 for extra flexibility.
SMC is easy to bond – you just have to get rid of the release agents used and these are
often internal. Light abrasion and solvent degrease is usually fine. CA, ET, MT, MS, ES, PT all work well on this substrate. Specialist grades available.
Stainless Steel Degrease with isopropanol, Acetone or Permabond Cleaner A. Do not use white spirits,
meths etc. as these can leave a residue. Abrasion or shot blasting is necessary to remove the oxide film which has a low surface energy. Power tools can heat the metal causing it to re-oxidise instantly so keep metal cool. Abrasion through Permabond 2K Primer works well.
Mirror-finish stainless steel can be particularly problematic. AA: HM136 or HM163 can be considered. A regular AA could be used along with A905 to speed up cure. UV bonds well to stainless / glass. ET, TA, ES, CA, PT, MT, MS can also be used.
STEEL Degrease with isopropanol, acetone or Permabond Cleaner A. Do not use white spirits, meths etc. as these can leave a residue. Abrade with carborundum grit paper or if you have access to a grit or sand blaster, abrade the steel with fresh grit or sand. Degrease the steel a second time and then bond immediately. It is important to degrease before and after abrasion to avoid ingraining dirt and contaminants into the metal and to remove any loose particles and dirt afterwards. Rust spots are the visible sign of surface oxidation on steel. It is important to bond ASAP after preparing the surface to prevent re-oxidation. Different grades of steel will respond differently to abrasion – some are quite easy to abrade, while others are almost impossible. AA, CA, ET, ES, MS, MT, PT, TA can be used. UV is also suitable providing the second substrate is clear or it is a dual cure grade.
STONE Remove large particles of dust and debris with a stiff brush. Ensure surfaces are as dry and clean as possible and free of oil. ET would be first choice, PT or MS could also be used. Beware TA - initiator staining on porous marble.
TEFLON Wipe clean with isopropanol or Permabond Cleaner A. Options for bonding Teflon are fairly limited. The easiest method is to prime with Permabond POP primer and then bond with Permabond 105. Alternatively, you can acid etch with “Tetra Etch” and then bond with epoxy, structural acrylic, cyanoacrylate, UV or anaerobic adhesive. Teflon (PTFE) can also be purchased pre-etched. POP + CA 105. Other adhesive technologies require significant pretreatment.
POP does not work with technology other than CA. Epoxy, acrylic, anaerobic, UV and CA can all be used if surface is acid etched first.
TUFNOL Phenolic can be bonded “as received” (so no surface preparation is required). Ensure
surfaces are clean and dry. CA, TA, ET, PT can be considered. ES will also bond
this material if heat cure if possible.
TUNGSTEN CARBIDE In many cases you don’t need to do anything except ensure the surfaces are clean and dry so a solvent wipe works well – however remember that tungsten carbide is a sintered material and so can be semi porous. As a result solvent evaporation may take much longer than you expect. In some cases release agents are used on the moulds and these can be difficult to remove by washing alone. Shot blasting (using fresh grit) or etching with concentrated nitric acid can improve performance significantly. For ultimate performance bond with toughened ES (e.g. ES550). Other technologies can be used but often strength performance isn’t sufficient.
VITON Can be bonded “as received” or if you wish, wipe clean with isopropanol or a suitable solvent. Permabond cyanoacrylates all work brilliantly on Viton rubber and will bond to such a high strength that the substrate will break before the bond does on destructive tests. Any Permabond CA.
WOOD Lightly abrade surface with Scotchbrite or carborundum paper. Degrease with isopropanol or suitable solvent. Surface should be clean and dry before bonding. CA, ET, PT, MT, MS, TA all suitable.
ZINC Degrease with isopropanol or suitable solvent. Surface should be clean and dry before bonding. Other surface preparation has very limited results. AA particularly good if on threaded components. ET, ES and TA can also be considered.

Copyright 2011 Glueonline.co.uk - Adhesive Solutions for Industry Terms and Conditions Click Here