Technical reference for flexible packaging buyers
Use these tables as a starting brief, not as a certificate of a finished product. Final values depend on resin grade, film structure, thickness, additives, print, seals and test method. Ask for a product-specific data sheet and approved sample.
LDPE / LLDPE bags and film
| Property | What to specify | Why it matters |
|---|---|---|
| Film thickness | Micron per layer or finished double-layer gauge | Strength, yield and price comparison |
| Dimensions | Lay-flat width × length + gusset | Fit and material calculation |
| Seal | Bottom, side, impulse or draw-tape format | Load security and filling method |
| Performance | Tensile, tear, dart impact or puncture target | Application-specific durability |
HDPE bags and film
| Property | Buyer input |
|---|---|
| Gauge / yield | State whether comparison is by micron, weight or pieces per kilogram |
| Opacity and colour | Natural, tinted or masterbatch colour with approved visual standard |
| Handles and perforation | Die-cut, T-shirt, patch, wicket or roll format |
| Food-contact use | Request resin and compliance documentation for the exact intended use |
POF shrink film
| Parameter | Confirm before quotation |
|---|---|
| Film format | Centre-folded, single wound or tubing |
| Thickness | Micron and tolerance |
| Shrink behaviour | Machine direction / transverse direction and tunnel conditions |
| Optics | Clarity, haze and gloss expectations |
| Seal window | Machine type, jaw temperature and line speed |
Zip-lock and slider bags
| Parameter | Options to define |
|---|---|
| Closure | Press-to-close zipper or slider system |
| Construction | Bottom fill, top fill, lip extension, tamper feature or wicket |
| Dimensions | Usable inside dimensions plus lip and zipper position |
| Film | LDPE blend, clarity, colour, thickness and recycled-content requirement |
| Printing | Artwork colours, repeat, registration and print surface |
Documents available by request
- Product-specific technical data sheet
- Material declaration or resin documentation where applicable
- Approved dimensions and tolerances
- Print proof and colour reference
- Seal or application trial notes