PET Resin High-Density Polyethylene Resin for Packaging Applications

1. Product Overview

name: PET resin (polyethylene terephthalate)

chemical formula: (C₁₀H₈O₄)ₙ

CAS Number: 25038-59-9

Appearance: Transparent or semi transparent particles

Density: 1.38-1.40 g/cm³

Melting point: 250-260°C

2. Main characteristics

Mechanical properties: high strength, high rigidity

Thermal performance: good heat resistance

Chemical properties: resistant to chemical corrosion, oil, fat, dilute acid, and dilute alkali

Electrical performance: excellent insulation performance

Transparency: High transparency, good glossiness

PET resin

Features

High transparency and glossiness: PET resin has excellent transparency, and the packaging containers made of it can clearly display the contents, with good visual effects. It is often used in beverage bottles, food packaging and other products with high transparency requirements, which can attract consumers' attention.

Good barrier properties: It has good barrier properties for oxygen, water vapor, etc., and can effectively prevent the contents from oxidation, moisture and deterioration, and extend the shelf life of the product. For example, carbonated beverage bottles use PET material to prevent carbon dioxide from escaping and maintain the taste and quality of the beverage.

High mechanical strength: It has high tensile strength and rigidity, is not easy to deform or break, can withstand certain pressure and impact, and is suitable for packaging various liquid and solid products.

Good chemical stability: It is resistant to corrosion by most chemical substances, has a certain tolerance to acids, alkalis, salts, etc., and can be used to package some chemically active products, such as condiments, medicines, etc.

Application

Beverage packaging: It is the main raw material for beverage bottles. Most of the materials used, such as mineral water bottles, juice bottles, and carbonated beverage bottles, are PET.

Food packaging: used to make food boxes, trays, bottles, etc., such as some snack packaging, fruit packaging boxes, cooking oil bottles, etc., to protect the freshness and quality of food.

Medical packaging: can be made into medicine bottles, medicine boxes, etc., its good chemical stability and barrier properties can ensure that the medicine is not affected by external factors during storage and transportation, and ensure the quality of the medicine.

HDPE resin

Features

Strong chemical corrosion resistance: It has excellent tolerance to a variety of chemical substances, such as acids, alkalis, salts, etc., and can safely package corrosive products such as detergents, chemical raw materials, etc.

Water resistance and moisture resistance: It does not absorb water, has good barrier properties to water, can effectively prevent the contents from getting damp, and can maintain the integrity of the packaging and the quality of the contents even in a humid environment.

High strength and rigidity: It has a high density and crystallinity, which gives it high strength and rigidity, can withstand large weight and pressure, and is suitable for making large packaging containers, such as chemical barrels, fertilizer barrels, etc.

Good processing performance: It is easy to process into packaging containers of various shapes and sizes through extrusion, blow molding, injection molding and other molding processes to meet the packaging needs of different products.

Application

Plastic film: used to produce agricultural film, packaging film, etc. Agricultural film is used to cover crops, which plays a role in heat preservation, moisture retention, and insect prevention; packaging film is used to package daily necessities, food, etc., and has good moisture and dustproof properties.

Plastic container: commonly used to make plastic barrels, plastic bottles, plastic boxes and other packaging containers, such as industrial chemical packaging barrels, household detergent packaging bottles, and plastic boxes for food packaging.

Pipe: The manufactured pipe can be used to transport fluids such as water and gas. Its corrosion resistance and water resistance make it not easy to damage in long-term use and have a long service life.

Precautions in packaging application

Material selection: According to the nature of the contents, storage conditions, transportation methods and other factors, PET or HDPE resin should be reasonably selected. For example, for beverages with high requirements for transparency and gas barrier properties, PET is preferred; for highly corrosive chemical products, HDPE is more suitable.

Recycling: Both have certain recycling value. In the process of packaging design and use, the convenience of recycling should be considered to promote the recycling of resources. At the same time, attention should be paid to the impact of different recycling channels and treatment methods on material performance.

Environmental impact: Although they have many advantages in the field of packaging, improper treatment of waste after use will pollute the environment. Minimize excessive packaging, promote environmentally friendly packaging design, and reduce negative impacts on the environment.

Processing control: During the processing, process parameters such as temperature, pressure, time, etc. should be strictly controlled to ensure the quality and performance of the packaging products. Different processing techniques may affect the performance of the material and need to be adjusted according to the specific situation.

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