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What plastics are difficult to glue?
29 Nov 2023
Plastics that are difficult to glue include polyolefins such as polyethylene (PE) and polypropylene (PP), and fluorine-containing polymer materials such as polytetrafluoroethylene and fluoroplastic 46. These materials are difficult to bond with adhesives, and good bonding results can only be achieved through special surface treatments.
Polyethylene (PE) is a white waxy translucent material that is flexible and tough, lighter than water, non-toxic, and has superior dielectric properties. Easily flammable and will continue to burn after removal from fire.
Polypropylene (PP) is a polymer formed by the addition polymerization of propylene. It is a white waxy material with a transparent and light appearance. Density is 0.89~0.91g/cm3, [1] It is flammable, melting point is 165℃, softens at around 155℃, operating temperature range is -30~140℃ [2]
Polytetrafluoroethylene (PTFE) is generally called "non-stick coating" or "easy-to-clean material". This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance and its friction coefficient is extremely low.
These difficult-to-stick plastics often have advantages that other polymer materials do not have, such as polyethylene and other polyolefin plastics. They are low in cost, have excellent performance, and are easy to process into various profiles, so they are widely used in daily life.
