Polyethylene CAS 9002-88-4 LLDPE

1. Product Overview

Low-density polyethylene (LDPE) is the original polyethylene — a white, translucent thermoplastic produced by high-pressure free-radical polymerization of ethylene. Its branched molecular structure gives it a low density , low crystallinity, and the flexibility, clarity and ease of processing that have made it the world's leading film and flexible-packaging polymer.

LDPE combines toughness with softness: excellent impact strength, elongation up to about 600%, superb electrical insulation, good chemical resistance to dilute acids, alkalis and alcohols, and reliable low-temperature performance. About 70% of LDPE goes into films — packaging, agricultural, shrink — while the rest serves injection and blow molding, extrusion coating, wire and cable insulation and foamed products. One polymer, the soft workhorse of the plastics economy.

A single polymer, four core value propositions:

Films & Packaging:

● the leading film resin for packaging, agricultural, shrink

Injection & Blow Molding:

● flexible moldings, closures, containers and toys with easy processing;

Extrusion Coating & Wire/Cable:

● coating resin for paper/aluminum laminates and insulation for wire and cable;

2. Product Information (Quick Facts)

3. Chemistry & Structure

LDPE is produced by free-radical polymerization of ethylene at high pressure (1,000 – 3,000 bar) and moderate temperature, which creates a polymer chain with extensive short- and long-chain branching. The branches disrupt crystallization, leaving a low-crystallinity, low-density material that is soft, flexible and clear. Lower crystallinity also means LDPE is more transparent and more permeable to gases than HDPE.

4. Key Features & Benefits

● Outstanding flexibility and clarity: soft, tough, translucent films and parts with good optics.

● Excellent electrical insulation: low dielectric constant and loss — ideal for cable and wire insulation.

● Good chemical resistance: resists dilute acids, alkalis, alcohols and most household chemicals.

● Superb low-temperature performance: stays flexible and impact-resistant in cold service.

● High elongation (up to ≈ 600%): tough films that survive handling, stretching and puncture.

● Easy processing: melts at 105 – 115 °C and processes well in blown/cast film, injection, blow molding and coating lines.

● Food-contact approved: FDA-compliant grades for food packaging .

5. Main Applications

5.1 Films & Packaging (Core Application)

LDPE is the world's leading film resin:

● Packaging films: food bags, merchandise bags, shrink film, stretch film and liners;

● Agricultural film: greenhouse film, mulch film and silage film;

● Multi-layer films: coextruded structures with LLDPE, EVA and barrier layers.

5.2 Injection & Blow Molding

● Injection molding: closures, bottle caps, housewares, toys and flexible parts;

● Blow molding: squeeze bottles, containers and flexible hollow articles;

● Rotational molding: soft, tough tanks and containers in blend formulations.

5.3 Extrusion Coating & Wire/Cable

● Extrusion coating: moisture-resistant coating on paper, board and aluminum foil (e.g. milk-carton laminates);

● Wire and cable: insulation and jacketing, including silane-crosslinkable power-cable compounds;

● Lamination: adhesive and sealing layers in multilayer flexible packaging.

5.4 Specialty

● Foamed products: soft, closed-cell foam for packaging and cushioning;

● Laboratory consumables: beakers, bottles and tubing in analytical use;

● Compounds: color masterbatch, crosslinkable and specialty compounded grades.

6. Packaging, Storage

Packaging (customizable):

● 25 kg multi-wall paper bag with PE liner, 25 kg fiber drum, or 500 kg – 1,000 kg FIBC;

Storage:

● Keep in a cool, dry, well-ventilated area away from direct sunlight and heat;

● Keep containers closed to prevent contamination and moisture pick-up;

● Store away from strong oxidizers; polyethylene dust can form explosive mixtures;

● Recommended storage temperature 5 °C – 35 °C.

7. Why Choose Jinan Future Chemical Co., Ltd.?

● Factory-direct supply: own production capacity, transparent pricing, no middleman markup;

● Stable quality: strict internal control, every batch tested, COA with every shipment;small trial orders accepted.

● Export experience: familiar with sea/air shipping documentation for chemical commodities, complete paperwork support;

8. FAQ

Q1: What is LDPE used for?

LDPE is used mainly for films — packaging, agricultural, shrink, stretch — which consume about 70% of production. It also serves injection-molded closures and housewares, blow-molded squeeze bottles, extrusion coating on paper and foil, wire and cable insulation, and foamed and medical products.

Q2: What is the difference between LDPE, LLDPE and HDPE?

The three polyethylenes differ in structure and density: LDPE (0.910 – 0.940) is branched — soft, clear, flexible, ideal for clarity films; LLDPE (0.915 – 0.925) has short linear branches — stronger, tougher films with higher puncture resistance; HDPE (0.940 – 0.970) is essentially linear — rigid, strong and opaque, used for bottles, pipes and crates. LDPE is the clarity-and-softness choice among the three.