{"id":2078,"date":"2015-12-23T22:17:57","date_gmt":"2015-12-23T22:17:57","guid":{"rendered":"https:\/\/permabond.com\/solvent-welding-days-numbered\/"},"modified":"2025-02-11T22:50:46","modified_gmt":"2025-02-11T22:50:46","slug":"solvent-welding-days-numbered","status":"publish","type":"post","link":"https:\/\/permabond.com\/pt-br\/solvent-welding-days-numbered\/","title":{"rendered":"Solvent welding \u2013 your days are numbered!"},"content":{"rendered":"

What is solvent welding?<\/h2>\n

Solvent welding is a method of joining two plastic substrate materials. The solvent chemical (often dichloromethane-based) or solvent cement attacks the surface of the plastic, dissolving it. The liquid polymers from substrate 1 are free to combine with those of substrate 2. Then the solvent evaporates, and Hey, Presto, the parts are welded together!<\/p>\n

Sounds pretty nifty, but shipping, storing, and handling those nasty solvent-based flammable chemicals can be the stuff of nightmares. Not forgetting to mention weakening the substrate, and attacking areas outside of the bond. In general, leaving a scruffy appearance (which for clear-colored plastics gives a really poor finish).<\/p>\n

What plastics are often solvent welded?<\/h2>\n

Typically, polycarbonate, polystyrene, PVC, ABS, acrylic, Perspex\u00ae are the usual victims of solvent welding. Often they are weakened, deformed, stress cracked or can lose their \u201clustre\u201d when attacked with solvent.<\/p>\n

Are there any good points for solvent welding?!<\/h2>\n

Solvents appear cheap to purchase compared to adhesives \u2013 although when you add up how much you get through, the extra cost of shipping and storing plus also consumption of volatile solvent materials will most likely be considerably more. This is due to evaporation – whereas adhesives are 100% solids.<\/p>\n

Many manufacturers of clear displays (so things like menu racks, display units, display boxes, signage, literature racks etc.) use solvent welding techniques. Due to the tightening of materials handling in the workplace plus the drive to improve product quality, there is now a strong demand for clear, non-yellowing adhesive products.<\/p>\n

Other applications use solvent cement which is a thicker material. For example, solvent cement is popular for bonding and sealing PVC water pipes together. Its use is widespread in the plumbing industry.<\/p>\n

Types of clear adhesive<\/h2>\n

Cyanoacrylate<\/h4>\n

The simplest clear adhesives are cyanoacrylates<\/a>. For a high quality finished appearance, a low odor, the non-blooming grade is preferred (blooming is the white powdery residue associated with cyanoacrylate adhesive). Permabond offers its 940 series cyanoacrylates. These cure inside the closed joint in seconds.<\/p>\n

UV Curable<\/h4>\n

UV-cure adhesives<\/a> are very easy to apply; they are single component and remain liquid until you flash the joint with UV light. Therefore making, positioning, and clean-up very easy and offers the perfect finished appearance with a crystal clear joint. Choosing the appropriate viscosity product will help minimize any air bubbles in the joint. UV adhesives were used primarily in high speed manufacturing, however, with cheap lamps available to any Tom, Dick, or Harry on eBay these days, even a small user with a limited budget can still afford this type of system.\u00a0 UV adhesives cannot be used on parts if they\u2019re opaque and block UV light; you must be able to cure through one of them.<\/p>\n

Methyl methacrylate<\/h4>\n

New crystal clear methyl methacrylate adhesives are now available \u2013 check out Permabond TA4204. This type of product offers a clear, non-yellowing finish and simplicity of application. Whack the cartridge into a handgun, attach the mixing nozzle, and away you go \u2013 no need for UV lights, curing ovens or anything. You have several minutes to assemble parts before the adhesive starts curing. Bond strength normally exceeds that of the substrate material.<\/p>\n

TABLE SUMMARIZING THE PROS AND CONS OF SOLVENT WELDING<\/p>\n

\"Solvent<\/a><\/p>\n

For more information, samples, or to discuss your application, please contact<\/a> Permabond!<\/p>\n

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 <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

What is solvent welding? Solvent welding is a method of joining two plastic substrate materials. The solvent chemical (often dichloromethane-based) or solvent cement attacks the surface of the plastic, dissolving it. The liquid polymers from substrate 1 are free to combine with those of substrate 2. Then the solvent evaporates, and Hey, Presto, the parts […]<\/p>\n","protected":false},"author":5,"featured_media":2084,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[607,613],"tags":[344,369,168,370,371],"class_list":["post-2078","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-adhesive-selection-and-use","category-troubleshooting-2","tag-clear-adhesive","tag-dichloromethane","tag-industrial-adhesive","tag-solvent-cement","tag-solvent-welding"],"acf":[],"yoast_head":"\nReplace solvent welding techniques with industrial adhesive<\/title>\n<meta name=\"description\" content=\"Solvent welding is a method of joining two plastic substrate materials. 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