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Views: 4862 Author: HengYi Packaging Technical Team Publish Time: 2025-08-21 Origin: Hangzhou HengYi Packaging Material Co., Ltd.
Choose a packaging film by its confirmed material grade, bag or roll structure, sealing method and intended use. PE, CPE, OPP and CPP are useful starting terms, but an abbreviation alone does not specify the finished packaging.
In packaging film quotations, CPE may mean cast polyethylene film. CPE is also used for chlorinated polyethylene, a different polymer material. Ask for the full material name and grade before comparing properties. A frosted appearance alone does not establish the resin or manufacturing process.
| Material | Packaging role | What to confirm |
|---|---|---|
| PE: polyethylene | Used for bags, tubing and film rolls; the resin formulation and structure determine the application. | LDPE, HDPE or other specified formulation; single-side thickness, dimensions and required strength. |
| CPE: cast polyethylene in this comparison | Cast PE packaging film can be used as a sealing layer or in a specified film structure. | Full material name, grade, clarity or haze, surface treatment and sealing requirements. |
| OPP: oriented polypropylene | Commonly selected for packaging appearance and print applications. Both sealable and non-sealable grades exist. | Film grade, coating or seal layer, sealing temperature and any lamination structure. |
| CPP: cast polypropylene | Often used as a heat-sealing layer in flexible packaging structures. | Seal performance and the grade required for the application. Heating or retort suitability requires a specified grade and complete structure. |
For simple open-top packing, compare our custom PE flat bags. For repeated opening and closing, compare ziplock and zipper bags. If you cut or seal packaging to different lengths, review PE film rolls and tubing.
These are different structures. A film comparison is not a promise that one material can replace another without checking the dimensions, closure, sealing equipment and packed product.
Packed product, intended use and any specified documentation requirements.
Finished bag width and height, usable zipper-bag dimensions, or film format and roll width.
Single-side thickness and unit; see our single-side versus total thickness guide.
Material name and grade, required appearance, closure or sealing method.
Quantity for each specification, roll length or net weight where applicable, and printing artwork.
Send your specification for a packaging quotation. Hengyi will review the PE bag or film requirements against the confirmed specification.
For the cast-polyethylene definition, see Novel Packaging's CPE film information. For the different chlorinated-polyethylene meaning, see VIA Chemical's CPE resin information. Sealable and non-sealable OPP grades are described in Jindal Films' film portfolio; the CPP sealing-layer role is described by Novel Packaging.
