Low-density polyethylene (LDPE) is safe and used in a range of items, from shopping bags to freezer goods. In the past, it was tricky to curbside recycle, but it’s becoming more accepted by recycling centers.
LDPE is a kind of polymer so this article aims to study and make this question clear
Firstly, polymer plays an important role in our life, which is hard to replace and appears everywhere around us as forms of furniture, shopping bags, woven bags, etc
When it comes to plastics, there are many types such as LDPE, LLDPE, HDPE, PP, PVC, PET, PS, etc. This picture is a simple way showing polymer structure
Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. Its manufacture employs the same method today.
LDPE is defined by a density range of 917-930 kg/m3. It is not reactive at room temperatures, except by strong oxidizing agents, and some solvents cause swelling. It can withstand temperatures of 80 °C continuously and 90 °C (194 °F) for a short time. Made in translucent or opaque variations, it is quite flexible and tough.
LDPE has more branching (on about 2% of the carbon atoms) than HDPE, so its intermolecular forces (instantaneous-dipole induced-dipole attraction) are weaker, its tensile strength is lower, and its resilience is higher. Also, because its molecules are less tightly packed and less crystalline due to the side branches, its density is lower.
When exposed to ambient solar radiation (consistent sunlight) the plastic produces significant amounts of two greenhouse gases – methane and ethylene. Due to its low density properties (high branching) it breaks down more easily over time compared to other plastics, leading to higher surface areas. Furthermore, production of these trace gases from virgin plastics increase with surface area/time, thus LDPE emits greenhouse gases at a more unsustainable rate compared to other plastics.
LDPE is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, plastic parts for computer components, and various molded laboratory equipment. Its most common use is in plastic bags. Other products made from it includes
*Trays and general purpose containers
*Corrosion-resistant work surfaces
*Parts that need to be weldable and machinable
*Parts that require flexibility, for which it serves very well
*Very soft and pliable parts such as snap-on lids
*Six pack rings
*Juice and milk cartons are made of liquid packaging board, a laminate of paperboard and LDPE (as the waterproof inner and outer layer), and often with of a layer of aluminum foil (thus becoming aseptic packaging)
*Packaging for computer hardware, such as hard disk drives, screen cards, and optical disc drives
If you are working in plastic polymer, particular to blown film, injection, raffia, yarn, thermoforming, laminated, HDPE pipe and multi-layer film. etc, you should know most important role of PE or LDPE resin inside plastic masterbatch additives which can help save production expenses, improve the surface features, hardness, chemical & physical durability and the heat resistance of your ending products
Masterbatch plastic made from PE base resin is a common material in plastic industry. In order to satisfy the dramatically increasing demands of using masterbatch plastic, manufacturers have paid a lot of efforts on researching and establishing more advanced materials. LLDPE, LDPE, MDPE and HDPE are the sub-group of the giant PE masterbatch family.
LDPE is the most common type of masterbatch plastic in the small group of PE plastic since it is extremely flexible and conforms with a wide variety of different material. Plus, it has a better concentration and dispersion than other plastics. This type is widely applied in various fields such as agriculture and construction. However, there was an exited drawback that this LDPE is not strong and dense as other types of plastic as well as easily being punctured and teared under impacts. The group of LDPE and LLDPE accounted for approximately 35% of total polyolefin production in Western Europe with over 22 million tons annually.
Our PE filler masterbatch is the Polyethylene based that containing fine pure Calcium Carbonate CaCO3 powder, polyethylene PE as the carrier and other appropriate additives. The range of calcium carbonate ratio is often around 70 to 85%. About color masterbatch also is based on Polyethylene and the most common plastic resin is LDPE, it is up on applications and requirements of each partners as well.