GB/T 33897-2026Biopolyester - Polyhydroxyalkanoates (PHA) blowing film (English PDF)

GB/T 33897-2026 is the English-translated version of 生物聚酯 聚羟基烷酸酯（PHA）吹塑薄膜.

This standard applies to blown films made from polyhydroxyalkanoates (PHA), a family of biopolyesters produced from renewable sources and used where biodegradable plastics are wanted. Blown film is a common process for making packaging and agricultural film, so the document is relevant wherever PHA materials are converted into thin plastic sheeting.

Film producers, resin suppliers, packaging converters, brand owners who source biodegradable materials, and testing laboratories are the typical users. It is a recommended national standard (GB/T), meaning it is voluntary unless a contract or customer specification invokes it. This 2026 edition replaces GB/T 33897-2017, so product specifications that cite the 2017 version should be reviewed. It was issued on 28 September 2026 and takes effect on 1 April 2027. For companies selling biodegradable film in China, or sourcing it from Chinese producers, the current edition is the reference to work from.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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