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2. High-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/High-density_polyethylene

   HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]

3. Recycling codes - Wikipedia

   en.wikipedia.org/wiki/Recycling_codes

   2 PEHD or HDPE High-density polyethylene: Plastic milk containers, plastic bags, bottle caps, trash cans, oil cans, plastic lumber, toolboxes, supplement containers [a] 3 PVC Polyvinyl chloride: Window frames, bottles for chemicals, flooring, plumbing pipes [a] 4 PELD or LDPE Low-density polyethylene

4. Bottle recycling - Wikipedia

   en.wikipedia.org/wiki/Bottle_recycling

   A key factor with glass milk bottles is the number of cycles of uses to be expected. Breakage, contamination, or other loss reduces the benefits of returnables. A key factor with one-way recyclables is the recycling rate: In the US, only about 30-35% of high-density polyethylene bottles are recycled. [8]

5. Plastic recycling - Wikipedia

   en.wikipedia.org/wiki/Plastic_recycling

   2–2.7 [57] High-density polyethylene (HDPE) Stiffness, strength, toughness, barrier to gas and moisture Water pipes, gas and fire pipelines, electrical and communications conduits, five gallon buckets, milk, juice and water bottles, grocery bags, some toiletry bottles T m = 130; [58] T g = −125 [59] 0.8 [57] Polyvinyl chloride (PVC)

6. Plastic bottle - Wikipedia

   en.wikipedia.org/wiki/Plastic_bottle

   High-density polyethylene (HDPE) HDPE is the most widely used resin for plastic bottles. This material is economical, impact resistant, and provides a good moisture barrier. HDPE is compatible with a wide range of products including acids and caustics but is not compatible with solvents. It is supplied in FDA-approved food grade.

7. Plastic milk container - Wikipedia

   en.wikipedia.org/wiki/Plastic_milk_container

   The most common material in milk packaging is high density polyethylene (HDPE), recycling code 2. Low density polyethylene (LDPE) and polyester (PET) [1] are also in use. Polycarbonate had been considered but had concerns about potential contamination with bisphenol A. [2]