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[Chemical Knowledge]：What material is lldpe? Detailed explanation of low density polyethylene linear polymer

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1. historical overview

lldpe is the abbreviation of English low density polyethylene linear polymer (linear low-density polyethylene), which is a linear structure polyethylene. The development history of lldpe can be traced back to the 1960 s, when American chemical companies invented a new type of polyethylene, namely polyethylene linear low-density polymer. Later, this polyethylene was widely used in the production of industrial products.

2. physical and chemical properties

1. appearance: lldpe appearance is white or gray granular material. It has good transparency, close to polypropylene and ps.

2. mechanical strength: lldpe plastic has excellent mechanical strength and flexibility, and its tensile strength, modulus and strain at break are better than other similar materials. So lldpe is mainly used for flexible packaging in the food field.

3. chemical inertness: lldpe has strong resistance to acid, alkali, salt and other chemical substances, and is basically not corroded by chemicals.

4. Heat resistance: lldpe can still maintain a certain strength and toughness at high temperatures, and the heat resistance is higher than that of ordinary polyethylene materials. Therefore, lldpe can be widely applied to products under high temperature environment.

5. String tear resistance (tear resistance):lldpe has great string tear resistance and tear resistance, and has significant tensile performance when it breaks.

3. use

lldpe is widely used in the manufacture of plastic film, plastic bags, pipes, household goods, medical equipment and other daily necessities, as well as agriculture, toys, auto parts manufacturing and other industrial fields. One of the most typical applications is plastic bags and garbage bags.

4. market development

With the development of industry, the market demand for lldpe materials has also undergone major changes. Judging from the trend in the international market, the application of lldpe in the packaging field has become a major trend, especially the hot sales of environmentally friendly recycling bags, and the application of lldpe in the chemical and energy fields is increasing. At the same time, the rapid economic development and population growth makes the demand for lldpe materials rising.

summary:

lldpe is a polyethylene material with a wide range of applications. It has excellent physical and chemical properties, widely used in plastic products, pipes and household goods and other fields. With the rapid development of economy and the improvement of low-carbon environmental protection awareness, the application field of lldpe materials will be further expanded, and the market prospect is broad.