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Catalogue
LDPE & LLDPE
Low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) are the main resins for flexible packaging. LDPE gives clarity and easy processing. LLDPE adds toughness, puncture resistance and down-gauging. Film lines often blend the two.
- Chemical namePolyethylene, low density / linear low density (ethylene–α-olefin copolymer)
- CAS No.9002-88-4 (LDPE); LLDPE by comonomer, e.g. 25087-34-7 (butene)
- Density (typical)LDPE 0.910 – 0.930 g/cm³ · LLDPE 0.915 – 0.940 g/cm³
- Comonomer (LLDPE)Butene (C4), hexene (C6) or octene (C8)
Typical properties
| Chemical name | Polyethylene, low density / linear low density (ethylene–α-olefin copolymer) |
|---|---|
| CAS No. | 9002-88-4 (LDPE); LLDPE by comonomer, e.g. 25087-34-7 (butene) |
| Density (typical) | LDPE 0.910 – 0.930 g/cm³ · LLDPE 0.915 – 0.940 g/cm³ |
| Comonomer (LLDPE) | Butene (C4), hexene (C6) or octene (C8) |
| Physical form | Pellets |
| Packing | 25 kg bags on pallets; confirmed in each offer |
Typical values for this material class from public technical literature. The governing values are those on the manufacturer’s TDS or COA for the exact grade quoted in each offer.
Applications
- Packaging and shrink film
- Stretch and cling film
- Agricultural and greenhouse film
- Extrusion coating and lamination
- Liners, bags and sacks
How the grade is selected
- Film type and thickness
- Melt flow index and density for the extruder
- Comonomer type for LLDPE (C4, C6, C8)
- Slip, antiblock and other additive packages
Documents with an offer
- TDSTechnical data sheet for the offered grade, when available
- SDSSafety data sheet applicable to the supplied product
- COACertificate of analysis or relevant lot documentation, when supplied
Frequently asked questions
Why blend LDPE and LLDPE?
LDPE improves bubble stability and clarity on blown-film lines. LLDPE adds tear and puncture strength. The blend ratio depends on the film and the line.
What does C4, C6 or C8 mean?
It is the comonomer used to make the LLDPE: butene, hexene or octene. Hexene and octene grades usually give tougher film than butene grades.
Do you supply film-grade additives in the resin?
Many grades come with slip and antiblock added. The offer lists the additive package of the exact grade quoted.
Related materials
Need this material?
Send the application, your current grade or specification, the quantity and the destination port. We reply with a written offer that names the manufacturer, grade and origin.