Factory Shrink Wrap Film Material LDPE Polyethylene Resin Pellets LDPE

Product Description

Product Description

How is PE made?

Polyethylene is made from the polymerization of ethylene  monomer. The PE chains are produced by addition or radical polymerization. The possible synthesis methods are:
 

• Ziegler-Natta Polymerization and 
• Metallocene catalysis

What are the common types of PE?

Depending on its density and branching, different PE grades can have very different performance from one another.

PE grades are therefore classified as follows.
 

• Branched Versions
  • Low-density polyethylene (LDPE)
  • Linear low-density polyethylene (LLDPE)


• Linear Versions
  • High-density polyethylene (HDPE)
  • Ultra-high-molecular-weight polyethylene (UHMWPE)


• Cross-linked polyethylene (PEX or XLPE)

Additionally, other types of PE are also available such as:
 

• Medium-density polyethylene (MDPE)
• Ultra low-density polyethylene (ULDPE)
• High-molecular-weight polyethylene (HMWPE)
• Metallocene polyethylene (mPE)
• Chlorinated polyethylene (CPE)

How to compare between the main PE types?

	LDPE	LLDPE	HDPE
Polymer Full Name	Low Density Polyethylene	Linear Low Density Polyethylene	High Density Polyethylene
Structure	High degree of short chain branching + long chain branching	High degree of short chain branching	Linear (or Low degree of short chain branching)
Catalyst and process	Using radical polymerization using tubular method or autoclave method	Using Ziegler-Natta catalyst or metallocene catalyst	Ziegler-Natta catalyst in: - Single-stage polymerization - Multi-stage polymerization or a Cr or Phillips-type catalyst
Properties	See detailed property comparison: LDPE vs. LLDPE vs. HDPE
Density	0.910-0.925 g/cm^3	0.91-0.94 g/cm^3	0.941-0.965 g/cm^3
Crystallinity	Low crystalline and high amorphous (less than 50-60% crystalline)	Semi-crytalline, level between 35 to 60%	High crystalline and low amorphous (>90% crystalline)
Characteristics	Flexible and good transparency Good moisture barrier properties High impact strength at low temperature Excellent resistance to acids, bases and vegetable oils	As compared to LDPE, it has: higher tensile strength higher impact and puncture resistance	Excellent chemical resistance High tensile strength Excellent moisture barrier properties Hard to semi-flexible
Recycling Code
General Applications	Shrink wrap, films, squeezable bottles garbage bags, extrusion moldings, and laminates	High performance bags, cushioning films, tire separator films, industrial liners, elastic films, ice bags, bags for supplemental packaging and garbage bags	Molecular weight distribution is relatively narrow, has applications in injection moldings or flat yarns, and the latter type Molecular weight distribution is wide, is used to make film products, hollow plastic products and pipes
Commercial Products	LDPE Grades	LLDPE Grades	HDPE Grades

Detailed Photos

What is low density polyethylene (LDPE)?

Low-density Polyethylene (LDPE) is a semi-rigid polymer with low crystallinity (~50-60%). The LDPE is composed of 4,000-40,000 carbon atoms, with many short branches. Compared to HDPE, it has a higher degree of short and long side-chain branching. The chemical structure of LDPE is:
 

 

LDPE Structure

How is LDPE manufactured?

LDPE is produced at high pressure (1000-3000 bar) and temperature (80-300°C). It is derived via the free radical polymerization process.

Two basic processes to produce LDPE:
 

• Stirred autoclave reactor
• Tubular reactor

 

What are the properties of LDPE?

 

1. LDPE Melting point: 105 to 115°C
2. Density of LDPE: 0.910-0.940 g/cm³
3. Chemical resistance of LDPE:
   • Good resistance to alcohols, dilute alkalis and acids
   • Limited resistance to aliphatic and aromatic hydrocarbons, mineral oils, oxidizing agents and halogenated hydrocarbons
4. Temperature resistance up to 80°C continuously and 95°C for shorter times.
5. Low cost polymer with good processability
6. High impact strength at low temperature, good weatherability
7. Excellent electrical insulating properties
8. Very low water absorption
9. FDA compliant
10. Transparent in thin film form

Product Parameters

LDPE Injection Grade
Tests	Value	Unit
Melt Flow Rate   (MFR)	15	g/10min
Density	0.922	g/cm3
Tensile Yield   Strength	7	Mpa
Elongation at Break	75	%
Wien Softening   Point	85	°C
Packing	In 25 kg PP woven bags,20MT/20'FCL
LDPE film grade
Tests	Value	Unit
Melt Flow Rate   (MFR)	2	g/10min
Density	0.9225	g/cm3
Tensile Strength	9	Mpa
Elongation at Break	500	%
Fish eye   max(0.3-2mm)	30	n/1200cm2
Stripes	20	cm/20m3
Packing	In 25 kg PP woven bags,20MT/20'FCL

Packaging & Shipping

25kg/ carton or 25kg/bag, or per your requirement
 

 

Application

Low density polyethylene is used for injection molding products, food packaging materials,       medical appliances, pharmaceuticals, blow molding hollow molding products, fibers, etc.  Polyethylene can be processed into film, wire and cable sheath, pipe, all kinds of hollowproducts, injection products, fiber, etc. Widely used in agriculture, packaging, electronic and electrical, machinery, automobile, daily necessities and other aspects.

Company Profile

    Hebei Aojin Import and Export Co., Ltd.. is a comprehensive enterprise integrating industry and trade.

    The main products are Graphite electrode,Petroleum coke ,copy paper and other plastic raw materials (ldpe, hdpe, lldpe, pvc, pva, pbt, eva abs, eps, gpps, hips, pc Pet, etc.).

     We will strictly check every link from raw materials to finished products to ensure the quality and stability of products. We also have our own professional design team, which can meet the needs of different levels of customers. All our products meet international quality standards and are well received in different markets around the world. We have a professional foreign trade team to expand overseas markets, can timely and properly deal with the problems raised by customers.
 

 

FAQ

Q: Are you a manufacturer or a trading company?

A: We are a manufacturer located in Hebei Province.

Can I get some samples before I place an order?

A: Yes, we can provide free samples, but you will pay the freight.

Q: How long will it take to get a sample?

A: 7-10 days for general products, 30-40 days for customized products. Depends on production arrangements.

Q: What documents do you provide?

A: Usually we provide commercial invoice, packing list, bill of lading, COA, health certificate. If your market has any special requirements, please let us know.