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Purchase of heavy, light and linear polyethylene (PE)

Name: خرید پلیاتیلن سنگین، سبک و خطی | ورق، میله و لوله PE با مشخصات فنی
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Purchase of heavy, light and linear polyethylene (PE)

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Purchase of heavy, light and linear polyethylene (PE)

category : polymer Polyethylene - HDPE
tag : polymer
Production date : 24 اسفند 1403
Dimensions :
type : Polyethylene – PE
comments count : 0
price : 1,111 Toman
off : 5%

Product Description

Polyethylene Sheets, Rods & Pipes | Buy HDPE, LDPE, LLDPE Materials

Understanding Polyethylene (PE)

Polyethylene (PE) is a member of the polyolefin family and is one of the most widely used thermoplastics globally. It is primarily available in two main types: Low-Density Polyethylene (LDPE) and High-Density Polyethylene (HDPE). Due to its low cost and versatile properties, PE is extensively utilized in various industries.

PE is a semi-crystalline polymer with a simple molecular structure consisting of repeating ethylene units. This structure imparts it with excellent chemical resistance, low moisture absorption, and good electrical insulating properties. PE is available in various forms, including sheets, rods, and pipes, and can be manufactured in different thicknesses and sizes to meet specific application requirements.

Technical Specifications of Polyethylene

Property	HDPE	LDPE	LLDPE
Density (g/cm³)	0.941 – 0.965	0.910 – 0.925	0.915 – 0.940
Melting Point (°C)	130 – 137	105 – 115	122 – 126
Tensile Strength (MPa)	20 – 37	8 – 12	10 – 30
Elongation at Break (%)	100 – 1000	100 – 650	600 – 1000
Water Absorption (%)	< 0.01	< 0.01	< 0.01
Dielectric Strength (kV/mm)	19 – 30	19 – 30	19 – 30
Operating Temperature (°C)	-50 to +80	-50 to +80	-50 to +80

Note: Values are approximate and can vary based on specific grades and manufacturing processes.

Types of Polyethylene

1. High-Density Polyethylene (HDPE)

HDPE has a linear structure with minimal branching, resulting in a dense and strong material. It offers excellent chemical resistance, low moisture absorption, and high tensile strength. HDPE is commonly used in:

Water and gas pipes
Chemical containers
Cutting boards
Industrial tanks

2. Low-Density Polyethylene (LDPE)

LDPE has a highly branched structure, making it more flexible and less dense than HDPE. It exhibits good impact resistance and is used in:

Plastic bags and films
Squeeze bottles
Wire and cable insulation
Flexible tubing

3. Linear Low-Density Polyethylene (LLDPE)

LLDPE has a linear backbone with short, uniform branches. It combines the properties of HDPE and LDPE, offering good tensile strength and flexibility. Applications include:

Stretch wrap films
Agricultural films
Liners and covers
Flexible tubing

Advantages of Polyethylene

Chemical Resistance: PE is resistant to a wide range of chemicals, making it suitable for containers and pipes in chemical industries.
Low Moisture Absorption: Its low water absorption rate ensures dimensional stability in humid environments.
Electrical Insulation: PE's excellent dielectric properties make it ideal for insulating cables and wires.
Lightweight: With a low density, PE contributes to weight reduction in products.
Processability: PE can be easily processed through various methods like extrusion, injection molding, and blow molding.

Disadvantages of Polyethylene

Surface Bonding Challenges: PE has low surface energy, making it difficult to bond with adhesives without surface treatment.
Lower Mechanical Strength: Compared to other engineering plastics, PE has lower tensile strength and stiffness.
Environmental Stress Cracking: PE can be susceptible to cracking under prolonged stress in certain environments.
Limited UV Resistance: Without stabilizers, PE can degrade under prolonged UV exposure.

Applications of Polyethylene

Polyethylene's versatility allows it to be used across various industries:

Packaging: Films, bags, containers, and bottles.
Construction: Pipes, geomembranes, and insulation materials.
Automotive: Fuel tanks, liners, and interior components.
Medical: Disposable syringes, tubing, and containers.
Agriculture: Greenhouse films, irrigation pipes, and mulch films.

Frequently Asked Questions (FAQ)

Q1: What is the difference between HDPE and LDPE?
A: HDPE has a higher density and tensile strength, making it more rigid and suitable for structural applications. LDPE is more flexible and is commonly used in film applications.

Q2: Can polyethylene be recycled?
A: Yes, both HDPE and LDPE are recyclable. They are often collected, processed, and reused in various products.

Q3: Is polyethylene safe for food contact?
A: Food-grade PE is safe for food contact applications. It's widely used in packaging, containers, and films for food products.

Q4: How does PE perform under UV exposure?
A: Standard PE can degrade under UV light. However, UV-stabilized grades are available for outdoor applications.

Q5: Can PE be glued or bonded?
A: Due to its low surface energy, PE is challenging to bond with adhesives. Surface treatments like corona or flame treatment can improve adhesion.