Author : CHI CHANG MACHINERY ENTERPRISE CO., LTD.

A roll of sheet comes off your PP sheet extrusion line. Thickness checked, surface checked, everything looks fine. The real test happens at your customer's plant, when that sheet is heated, formed, and trimmed into food trays. If one corner comes out too thin, if this batch looks hazier than the last, or if the web keeps drifting to one side, the sheet is one of the first things that gets checked.

PE breathable film is a polyethylene film with micron-scale pores throughout: water vapor passes through, while liquid water is held back under the designed pressure conditions. In baby diapers and sanitary napkins, a liquid-barrier outer layer that can still release moisture vapor, thanks to its microporous structure. Chi Chang’s listed applications also include masks and surgical gowns; actual use depends on the product’s construction and regulatory requirements.

Search the two most-discussed packaging regulations of the past two years — the EU's PPWR and California's SB 54 — and you will not find the words "bubble film." The named items are tea bags, fresh-produce labels, very lightweight carrier bags; the headlines belong to compostable materials and recycling-rate targets. A protective-packaging manufacturer might reasonably exhale.

In under two months, the EU's Packaging and Packaging Waste Regulation (PPWR, 2025/40) reaches its General Application Date on August 12, 2026. The date has circulated in plastics-packaging circles for nearly two years, but with only two months remaining, the level of tension across the industry is markedly different from the earlier, more relaxed "there's still time" phase.

A packaging plant in Poland just lost its third shift supervisor this quarter — the second experienced operator to retire since January. Meanwhile, their biggest EU client is demanding 50% post-consumer recycled content by Q1 2027, and every test run with high-PCR feedstock ends in the same frustrating cycle: unstable melt pressure, air bubbles in the sheet, and a scrap bin that fills up faster than the finished goods pallet.