Single-use paper cups used for takeaway coffee and other beverages release millions of microplastic particles when exposed to hot liquid, University of Queensland researchers have found.
One must imagine you happy for learning so much because once again you’re confusing one thing with another, this time the industrial manufacturing of a raw material with the application of a coating.
Wax coatings do not polymerize when applied to packaging. The packaging factory uses hot-melt or roll coating: they heat the wax until it liquidfies, roll or spray it onto the paper, and let it cool. It’s a purely physical phase change (melting and freezing), not a chemical polymerization reaction. The individual molecules remain short-chain, low-molecular-weight compounds.
Even synthetic options like polyethylene wax are fully polymerized at the chemical plant before they ever touch the packaging, and they are specifically engineered to remain low-molecular-weight fractions that dont form persistent microplastics. If the packaging uses bio-based waxes (like beeswax or soy), polymerization never happens at any point in the cycle.
And yes, wax is soluble in grease and physically weaker than plastic… that’s why it safely biodegrades in the environment and passes through biological systems, rather than mechanically fragmenting into indestructible, toxic microplastics that last for generations.
One must imagine you happy for learning so much because once again you’re confusing one thing with another, this time the industrial manufacturing of a raw material with the application of a coating.
Wax coatings do not polymerize when applied to packaging. The packaging factory uses hot-melt or roll coating: they heat the wax until it liquidfies, roll or spray it onto the paper, and let it cool. It’s a purely physical phase change (melting and freezing), not a chemical polymerization reaction. The individual molecules remain short-chain, low-molecular-weight compounds.
Even synthetic options like polyethylene wax are fully polymerized at the chemical plant before they ever touch the packaging, and they are specifically engineered to remain low-molecular-weight fractions that dont form persistent microplastics. If the packaging uses bio-based waxes (like beeswax or soy), polymerization never happens at any point in the cycle.
And yes, wax is soluble in grease and physically weaker than plastic… that’s why it safely biodegrades in the environment and passes through biological systems, rather than mechanically fragmenting into indestructible, toxic microplastics that last for generations.