Adhesives because that Plastics

Plastic has actually come a long method from the beforehand days that Bakelite come the large array of polymers we check out all approximately us every day. Us have become so accustomed to see plastic that us don’t also give it a second thought. Most human being see plastic and assume every plastics re-publishing the same quality and also properties. However, there are numerous varieties of polymers, and each has distinctive characteristics.

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So countless of our daily items room plastic and, from time to time, this items break. It might be a child’s favorite toy or probably your lucky keychain, yet the an initial thought in her head will probably be “I’ll choose up some super glue and fix it later.” while a cyanoacrylate adhesive (CA) glue might work, not all plastic are the same and also the ideal methods that bonding these plastics deserve to vary, depending on the type of plastic you space working with. Some plastics might require a plastic glue that has actually incorporates a solvent-based bonding, and others might require one epoxy-based adhesive.

Determining Plastic type Using the Recycling Logo

Most, if no all, that us recognize the recycling symbol once we view it. It consists of three arrows that kind a triangle. It’s all roughly us every the time, yet have you ever before looked closely and also noticed that there may be a number in the center or an additional code under it? This number or password tells us what group of plastic the item drops into. While this numbers and codes exist mainly to ensure the different types of plastic space recycled properly, they deserve to also assist you identify what kind of adhesive come buy if you should bond the material.

Choosing the appropriate Adhesive


In total, there room eight recycling codes because that plastic. These codes show the precise material the product is do of. Items stamped with a 1 are made from Polyethylene Terephthalate (PET), if 2 way High-Density Polyethylene (HDPE). 3 is provided for Polyvinyl Chloride (PVC), 4 way Low-Density Polyethylene (LDPE), 5 represents Polypropylene (PP), 6 is because that Polystyrene (PS), 7 suggests other plastics, and 9 is supplied to represent acrylonitrile butadiene styrene (ABS).

Once you know what kind of plastic you space dealing with, you need to select the adhesive best suited for the material. Plastic in category 1, 2, 4, and also 5 room very daunting to glue. Look for an adhesive labeled for polyethylene or polypropylene. However, specific items in group 1 may prove impossible to glue.

Category 3, PVC, is most frequently used in plumbing. Because that gluing PVC, over there is a two-part primer and PVC solvent cement commonly available in many hardware or home improvement stores.

Items in classification 6 space made the polystyrene. Because that bonding polystyrene, you deserve to use one of a few different options. A poly cement, epoxy, or cyanoacrylate will form a sufficient bond on this items.

Category 7 is a catch-all for plastics the don’t fit into the other categories. These plastics encompass polycarbonate and also acrylic. Because that polycarbonate, one epoxy will occupational best. Afford the best an outcome with acrylic requires an acrylic solvent adhesive. Cyanoacrylate might work, depending upon the project.

Category 9 is because that ABS plastics. While ABS solvent adhesives space available, they do warp the plastic to a degree. Because that optimal results, an epoxy should be used. However, cyanoacrylate adhesive may also work well because that this application.


The Infinity SuperTAC 500 Plastic Bonding adhesive Sticks are among the best plastic bonding hot melt options. Through their quality warmth resistance and bonding abilities to a wide range of plastics including PP, PE, PET and PV, the SuperTAC 500 outperforms numerous other plastic bonding adhesive sticks. The product’s expense effective price per pound additionally can’t be beat.

How to recognize Plastic form When No Recycling logo design Is Present

In part instances, a recycling logo and code might not be significant on the article in question. Under this circumstances, friend will have to make an educated guess or perform a little of research. There space a couple of things to store in mind that may aid you identify the exact plastic you’re handle with. If the plastic is hard like a bucket or milk crate, that is most likely to be polyethylene or polypropylene. These plastics are practically impossible come glue uneven you select an adhesive that is significant specifically for use through polyethylene or polypropylene.

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Clear, brittle plastics choose imitation glass or CD instances are normally polystyrene. A poly cement will work finest on these. Legos are made the ABS. If the secret plastic feels comparable to a Lego block, you’ll desire to use an epoxy cement. It is essential to note that solvent-based adhesives deserve to warp and readjust the surface ar of the plastic. This is miscellaneous to take into consideration if illustration is important.

In Conclusion

When you must adhere plastic, the is crucial to identify what type of plastic you are dealing with. Plastic come in many forms, and knowing what type of you space working with allows you to select the proper adhesive for the job. If you still have questions and also would prefer to speak through a adhesive expert, call us. Among our knowledgeable team members deserve to assist you and also find the right adhesive for your application.