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A GUIDE TO Difficult-to-bond for @ / info info www.craftechind.com company CraftechIndNY . @ craftechind craftechind / craftech . com . com - industries / blog 1 www.craftechind.com (800) 833-5130 What makestheseplasticssod the gluetograbonto. for nothing there’s so slippery, and smooth extremely are they words, other In itself. secure can an which onto roughness surface or site functional no feature surfaces. They non-functional or non-polar and porosity, low energies, surface low their of because bond chemically to conditions. As a result, these also tend to be difficult environmental and chemical specific in anti-corrosive be to specifically formulated are plastics modern Many 4hu crn tm w atmtd o ra te ics pr to apart pieces determine whichgluesworkedbest.Readonforour results! the break to attempted we time 24-hour tried sticking each sample of plastics (listed right) to itself and after a be compatible with some of the most difficult-to-bond polymers. We our lastblogpostonthesubject. since plastics!) (and glues of list our expanded we’ve market, the on high bond strengths. In order to steer you towards the best adhesives situations. many in useful be We tested the bonding capabilities of various glues that purport to Being able to effectively bond two surfaces together can

Yet, few adhesives offer consistently offer adhesives few Yet, Objective

i fficult tobond? Teflon (PTFE) Poly P P Nylon Lexan world ofplastics the in friction of coefficients lowest the of one has Teflon non-reactivity. melting and temperature, high properties, dielectric excellent flu synthetic A seily sfl hr mitr resistance and lowcostare required. moisture where useful especially is This toughness. good and density, low thermopl A wide a in variety ofapplications. useful it making , and bases , chemical many to resistant unusually t A the with metal elasticity ofrubber. of It toughness temperature. the combines and abrasion to resistance and flexibility, toughness, including properties An rigid andstablematerialisrequired. frequently is used when a low cost, high Nylon mechanical strength, point. melting high and resistance wear properties, mechanical good commonly A electrical and thermalproperties. optical, impact, creep, ofstiffness, weathering, excellent exhibits It toughness. combination and hardness a unique that offers polycarbonate amorphous An olypropylene olyurethane elastomeric material of exceptional physical exceptional of material elastomeric empatc oye ta i rge and rugged is that polymer hermoplastic ethylene

si wt hg ipc resistance, impact high with astic » » used synthetic polymer because of because polymer synthetic used oropolymer characterized by its by characterized oropolymer Materials

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2 www.craftechind.com (800) 833-5130 ® TECH BOND Plastics BondingSystem BP Blue» glue onapiece ofscrapmaterial. any test always to sure make concern, a is appearance on our Lexan sample, indicating a . If discoloration and clouding caused adhesive This NB: able to break apart the Lexan or samples. splintered as we broke the bonds, however we were not it like sounded plastic The created. bond the break to samples the gluing attempted then 24 hours for cure them let we together, and priming After use. to glue easiest the was System Bonding Plastics Loctite The O vn egn a cedie it sih gp bten the between pieces didn’twork! gaps slight into screwdriver a wedging Even perfectly. samples our of all bonded adhesive this sanding, curing, all of the plastics broke apart with ease. However, after of hours twenty-four After . or scrub wire of kind the plastics untreated and didn’t roughen the surface with any left the we attempt, first our For plastics. because hard-to-bond bonding adhesive this out to solution the was product their that try boasted manufacturers to excited were We O u u r Results r Results [ [ bond which providesastronger,moredurableresult. strings, quickly, easilyandpermanently.Itcreatesamolecular polymerwith bond to engineered solution one-step A ts uc, ay ad ott bat is fetvns o hr t bn patc such as plastics tobond Plexiglass™, polycarbonate, polystyrene, PVC, andpolypropylene. hard on effectiveness its boasts Loctite and easy, quick, It’s A two-partcyanoacrylateadhesive that sets insecondsanddoesn’trequireclamping.

» by the condensedwatervaporon by the two surfaces.Thereaction iscaused very quicklywhentrappedbetween referred to as Cyanoacrylate is more commonly mechanical use. so it is not ideal for outdoor or repeatedly totemperature changes, bond seemstoweakenifexposed partsandthe between twostationary Cyanoacrylate is idealjoin for atight mayaffectthat capabilities. bonding isafactor surfaces,sohumidity the and howdoesitwork? What is ] cyanoacrylate superglue and hardens ]

3 www.craftechind.com (800) 833-5130 J-B WELD LOCTITE® PlasticWeld » PlasticBonder O quite powerful. was smell chemical the as PlasticWeld when the mask using face a wearing recommend We NB: even after we tried desperately to separate the parts. quit, wouldn’t just that strong for space available the all in filling bond, gap-free a create to spread It samples. our on well worked PlasticWeld with sandpaper to give the glue some added grip. The This adhesrive also called for roughening the surface O or othernon-sticksurfaces. Teflon™ , polyethylene, for recommended epoxy wasn’t the though even well, together held samples other The bond. the break to manage to work of bit a quite was it then even and pieces layered the between space small a into screwdriver a wedging after sample polyurethane the apart break to managed only We apart. them break to challenge a quite became it pieces, the re-gluing and sanding after However, surface. the roughen to sandpaper grit 220 with plastic the sanding of step crucial the Our first try with this adhesive proved a failure because we missed u u r Results r Results [ [ recommended forpolyethylene,polypropyleneorsomeotherplastics. not 2-3 hours.Itis a functionalcurein life with work types. Ithasa 20-25minute plastic major most a durablebondto A hand-mixable,that forms fast-setting epoxyputty An acrylic formula that is specially formulated to bond and repair plastic surfaces. The plastic bond andrepair to formulated specially that is An acrylicformula high strengthbondin20to25minuteswithafullcuretwenty-fourhours. a tough,rigid, of each equalamounts component whichproduces dispenses double

» whole compoundstronger. Epoxyis it takes to set. Hardener makes the hardener more isadded,the time user. needsofthe the Themore the different upon depending ratios hardener are to mixedtogether polyamine. Epoxyresin andepoxy hardeneris anepoxideandthe isa andahardener; where resin the created byamanualreaction ofa is a basically Epoxy isalsoknownaspolyepoxide.It underwater. resistant towaterandcanevencure What is how doesitwork? thermosetting epoxy and ] ]

4 www.craftechind.com (800) 833-5130 PLEXUS®

3M™Scotch-Weld MA310 Adhesive O odd ihl t isl. h sf patc vn chipped even when wetriedtobreakthe bond. plastic soft The itself. to material, tightly slippery bonded a notoriously Teflon, Even results. perfect obtained we Again, bond. strong a of chances the improve to just anyway did we surface, the roughen to ratio have correct not did we said directions the though Even plunger. the and an nozzles, of mixing use gun, the applicator requires also adhesive structural This O any ofourplasticsapart. of samples the break to able not were We difficult. extremely be to proved created bond the break to trying hours, 24 the after and, samples the clamped MA310 is a breeze. For this adhesive, we sanded and the applying then materials, these all have you If plunger. ratio correct the and nozzles, mixing gun, This adhesive required the purchase of an applicator budget. strict a on someone for not is MA310 The u u r Results r Results [ [ ™ A two-part methacrylate bonding ofthermoplastic, A two-part adhesive designedforstructural cartridges. in ready-to-use Supplied materials. difficult-to-bond adhere to ability the with stiffness materials,theMA310 combines high forbondingthermoplastic strength and well suited minutes and achieves a rapid fixture in 30 to 35 minutes at room temperature. Particularly of 15to18 time metal andcompositeassemblies.Combinedata1:1has a working ratio, it and thermoplasticolefinswithoutsurfacetreatment. including polypropylene, low plastics polyethylene performance onmost Two-part acrylic based highadhesive with a10:1 qualitybonding that provides ratio DP8010»

» to form chemical chains that bind with each bindwith to formchemicalchainsthat and resin are react chemically mixed,they curingagent and easytouse.Oncethe as alsoreferred adhesives, Methacrylate to strength build-up. reaction increases toprovide more rapid chemicalreactionthe rateof the initiates, thorough mixingisnotascrucialand,once , andmetals.Unlike plastics andcertainsurfaces,particularly other acrylic adhesives and howdoesitwork? What is methacrylate , are incredibly strong

] ] 5 www.craftechind.com (800) 833-5130 AMAZING GOOP STANLEY All PurposeAdhesive» Hot GlueGun O small, delicate projects. for ideal than less pieces. it making goopy, the extremely is it all separate to name: its to up lived Goop Amazing the Additionally, able were we end inthe but difficult, very was It severed. was completely bond the until place into back them snapped glue the apart, pieces the break to attempted we As This adhesive created a bond that worked like elastic. O each yieldedthesameresultsonsamples. as glues, strength super II Formula the and all-purpose the between difference any be to seem didn’t There all. at break to able not were we which Lexan, and pieces, two the between wedged screwdriver a which we were able to break after a lot of effort and maneuvering with was very difficult. The hot melt adhesive was most effective on nylon, was a bit more successful. While we were still able to break the bond, it Polypropylene all. at bond a create didn’t Polyurethane easily. pretty hit or miss success rate. After 24 hours, Teflon and polyethylene split a had sticks Both sticks. glue strength super II Formula and sticks glue all-purpose adhesives, melt hot of types different two used We u u r Results r Results [ Safe forapplicationsexposedtodiluteacidsandcaustics. in coldweather. subject brittle to vibration. Good forbondingitems strength toanyotherbrand.Doesnotbecome with superior materials of variety wide a to stick and seal repair, to formulated Scientifically » [ few secondstooneminute.Itdoesnotlosethicknessduringsolidifying. a in solidifies and hot, when tacky is glue The caution. with use so skin, blister and burn diameters. The hotenough of the heated glue squeezedout initially to various nozzle is of sticks cylindrical solid in supplied commonly adhesive thatis of A form

complete melting of the adhesive. ofthe complete melting of bondstrength athighertemperatures, up to tohighertemperatures,not sensitive andloss polymer,load ofthe useto polymers limiting Some involve of disadvantages thermal the specialprecautions. ofwithout can bedisposed andusually life havealongshelf adhesives melt Hot dryingorcuringstepiseliminated. and the organic compoundsare reduced oreliminated Volatileadvantages oversolvent-basedadhesives. provide adhesives industrial use,hotmelt several ethylene resin elements, including containawiderangeof adhesives Hot melt What is andanyassortmentof and howdoesitwork? , hot meltadhesive ethylene-vinyl acetate or ] polypropylene polyamide , , poly- wax . In

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Technical data Technical Bond strength Bond Scotch-Weld DP8010 3M 3M Scotch-Weld DP8010 3M Loctite BondingSystem Loctite Loctite BondingSystem Loctite J-B Weld Plasticweld J-B Weld Plasticweld What isthebest adhesiveforhard-to-bond plastics? TechBond BP Blue TechBond BP Blue Amazing Goop Amazing Goop Plexus MA310 Plexus MA310 Loctite Epoxy Loctite Epoxy Hot GlueGun Hot GlueGun decent very strong very strong very strong very strong strong strong very strong Lexan Acetate Vinyl Ethylene Acrylic Methacrylate Epichlorohydrin & BisphenolA Methacrylate Methyl Cyanoacrylate Ethyl Ethyl Modified Adhesive Base * the information listedabove. the information own their do should Companies only. guide testing when using the a above materials. Craftech Industries as cannot be held responsible for intended any of is here listed information the that be to seem winners the and plastics pesky those on use to adhesives best the found we’ve fingers) our (even togehter everything sticking After decent weak very strong very strong very strong strong weak very strong Teflon 24 to72hours 60 seconds 8 -24hours 30 -35minutes 1 hour 24 hours 24 hours 24 hours Curing Time decent strong very strong very strong very strong strong weak very strong Nylon 3800 psi 391 psi 2400 psi 3988 to4496psi 3200 psi 2903 290 to2900psi 13053 to18854psi Tensile Strength J-B Weld to decent relatively strong very strong very strong very strong strong weak very strong Polypropylene 3477 psi , Plexus -40°F to150°F 0° Fto359° -20°F to180°F -67° Fto249° -67° Fto500°F -40° Fto180° up to180°F -65° Fto220° Temp Guidelines , and , decent no bondcreated very strong very strong very strong decent strong very strong Polyurethane 3M ! Please remember Please ! decent weak very strong very strong very strong strong weak very strong Polyethylene 7 www.craftechind.com (800) 833-5130 * PLEXUS WASTHIS CHART TAKEN FROM METHACRYLATE CYANOACRYLATE EPOXY HOT MELT Advantages » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » Adhesive ComparisonChart» Fast setting Versatile formulations Rigid toflexiblebondsavailable capabilities Good gap-filling Moderately priced Good flexibility atlowtemperaturesGood flexibility fromCan bedispensed mostpackages Tolerant surfaces ofdirty cureMedium/fast Substrate versatility peelandshearstrengthsExcellent impactresistanceExcellent andflexibility Good gapfill Moderately priced Dispense easilyfrom package life Indefinite pot No mixingrequired High Tensile strength tometal Good adhesion torubber adhesion Excellent Single componentadhesive Rapid cure atroom temperature Good temperature andsolventresistance Versatile Wide rangeofformulations High strength: metals with canbefilled capabilities Good gapfilling lowpriced Usually ® GUIDETOBONDING.

Limitations » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » » Limited gapcure Higher priced Special equipmentneededtoweigh,mixanddispense createsShort potlife waste Slow fixturing Exact proportions strength neededforoptimal Two componentmixingandmeasuringrequired duringcuringcycles thin Adhesives Environmentally unfriendly Flammable manyplastics Attack Poor temperature, moisture, andsolventresistance surfaces toboth Many mustbeapplied Poor creep resistance Poor gapcure lowstrengthUsually Flammable Some odorproblems No water, chemicalorenvironmental resitance Poor impactandpeelresistance Bonds skin Low temperature resistance Low solventresistance 8 www.craftechind.com (800) 833-5130