https://smiala.com/en/material/pet/ Recent content in Pet on Big-Bag to Silo Trailer Transloading — SMIALA Poland Hugo en Sun, 15 Jun 2025 00:00:00 +0000 https://smiala.com/en/wiedza/materialy/granulaty-polimerowe/pet/ Wed, 07 May 2025 00:00:00 +0000 https://smiala.com/en/wiedza/materialy/granulaty-polimerowe/pet/ <h2 id="definicja">Definition</h2> <p><strong>PET (polyethylene terephthalate)</strong> is a thermoplastic polyester from the terephthalate group, obtained by polycondensation of terephthalic acid (or dimethyl terephthalate) with ethylene glycol, supplied to processors as bottle-grade granulate or recyclate with a density of about 1.38 g/cm³, hard, transparent and strongly hygroscopic, used for bottles, polyester fibres and films.</p> <p>Within the family of commodity plastics, PET stands somewhat apart from the polyolefins. <a href="https://smiala.com/en/wiedza/materialy/granulaty-polimerowe/pe-polietylen/">Polyethylene</a> and <a href="https://smiala.com/en/wiedza/materialy/granulaty-polimerowe/pp-polipropylen/">polypropylene</a> are light, chemically inert hydrocarbons that float on water and absorb little moisture. PET is heavier, polar, sinks and — most importantly from a logistics standpoint — greedily absorbs water from the air. These two characteristics, density and hygroscopicity, determine how PET granulate must be transported and transloaded.</p>