No
Polyethylene is a plastic, not metal. In fact, polyethylene is the most common plastic now-a-days.
Examples: polyethylene terephtalate (PET), polyethylene, polypropylene.
Polyethylene is a thermoplastic polymer.
Most of plastic bags are made of Polyethylene. It could be made of High Density Polyethylene (HDPE) or Low Density Polyethylene (LDPE) or a combination of both in addition to Linear Low Density Polyethylene (LLDPE).
In polyethylene bags or cardboard boxes. Rarely in glass bottles.
polyethylene
Polyethylene is commonly found in plastic items such as plastic bags, plastic bottles, and food containers. It is also used in pipes for plumbing and tubing for irrigation systems. Additionally, polyethylene is used in the manufacturing of many types of packaging materials.
- the polyethylene plastic bottle is unbreakable- the glass has a solubility (low and dependent on the type of glass) in acids
The cheapest type of plastic available in the market is usually polyethylene, specifically low-density polyethylene (LDPE).
Plastic bags are made from polyethylene, which is derived from petrochemicals like oil or natural gas. The polyethylene is melted and extruded into thin sheets, which are then cut and sealed to form the shape of the bag. The bags are then printed with any necessary designs or labeling before being packaged and shipped for use.
Making jelly jars. Jelly is packaged at a temperature higher than polyethylene's glass transition temperature, so the jars would deform if you tried it.
Plastic. Of course they're made out of plastic, The type of plastic is polyethylene. From the low melting point (195F) they are most likely made out of low density polyethylene.