High Density Polyethylene (HDPE)

DESCRIPTION

High-density polyethylene is a polymer produced from the monomer . It has a high strength-to-density ratio, making it one of the lighter polymers with a specific gravity (.955) lighter than water. Polyethylene is naturally slick, and often used to protect surfaces like furniture corners, boat docks, and moving dollies. HDPE will not break underload and is very resistant to most common chemicals. HDPE is one of the easiest plastics to recycle and goes by the identification code number “2”. Plastic lumber used in outdoor furniture is primarily recycled HDPE type. Meyer Plastics uses HDPE in many of the OEM parts we make for our customers. As a result, we stock several different sheet sizes to serve that business.

PRIMARY SOURCE

About the supplier:

Primex Plastics is our primary source of HDPE.

Meyer Plastics stocks natural and black HDPE in sheet .060-1.50 inches 48” x 96”. We also have several nonstandard sheet sizes and colors due to our custom business. Most any size can be readily sourced.

Typical Characteristics

Typical Industries

Chemical Processing Industry
Mechanical Engineering Industry
Building Industry
Aquafarming
Drinking & waste water technology
Chemical storage tanks

HDPE Properties

Property	Test Method	Unit	Guideline Value
Density	ASTM D792	g/cm³	0.955
Water Absorption	ASTM D570	%	<0.10
Mechanical Properties
Hardness	ASTM D2240	Shore D	65
Tensile Strength at yield 73°F	ASTM D638	psi	4000
Tensile Modulus	ASTM D638	psi	217000
Elongation at Break	ASTM D638	%	>700
Flexural Strength	ASTM D790	psi	>210000
Izod Impact, Notched	ASTM D256	ft-lb/in	3.5
Coefficient of Friction, Dynamic			0.20-0.29
Thermal Properties
Coefficient of Linear Thermal Expansion	ASTM D696	in/in/°F x10^-5	6
Melting Point		°F	268
Maximum Service Temperature, Air		°F	180
Heat Deflection Temperature 264psi	ASTM D648	°F	165
Brittleness Temperature	ASTM D746	°F	-103
Flammability, UL94		1/8 inch	HB
Electrical Properties
Dielectric constant	ASTM D150	1MHz	2.4
Surface resistivity	ASTM D257	Ohm/cm	>10¹⁴
Compliance Properties
FDA			Yes
NSF			No
USDA			Yes

Click to compare temperature and tensile PSI between different materials

Boston Whaler 13’ with a newly fabricated interior. Boat was originally made with mahogany interior which eventually rotted to disrepair. Meyer Plastics copied the parts and CNC routed replacements for a service free interior.

Low-cost neuter rescue shelter. They wanted plastic fronts on the kennels to provide privacy for the dogs for a lower stress environment. Meyer Plastics field measured their doors and CNC routed durable HDPE door fronts that could be easily removed for washing. Each door is tagged numerically to allow replacement to the proper location after cleaning.

HDPE Tray used to hold engine injection nozzles for a large construction equipment manufacturing customer. Meyer Plastics reworked their existing mold saving an expensive tool rebuild.

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Plastic	Max	Min	Range
PTFE-Teflon	500	-328	828
PAI-Torlon	482	-328	810
PEEK-Polyetheretherketone	482	-76	558
PEI-Ultem	392	-58	450
PPSU-Radel	356	-58	414
PPS-Polyphenylene sulfide	356	-4	360
PSU Polysufone	302	-58	360
PVDF-Polyvinylidene fluoride	302	-58	360
PC-Polcarbonate	275	-76	351
PA-Nylon Extruded	225	-22	247
POM-Acetal Homopolymer	221	-58	279
PA-Cast Nylon	221	-22	243
HDPE-Polyethelene	212	-40	252
PET-P Polyester	210	-58	268
Acetal Copolymer	203	-58	261
UHMW-Polyethelene	180	-238	418
PMMA-Acrylic	194	-40	234
ABS-Acrylonitrile Butadiene Styrene	176	-4	180
PP-Polypropylene	162	32	130
PVC-Polyvinyl Chloride	144	14	130

Plastic	Tensile PSI
PAI-Torlon	20,000
PEI-Ultem	15,000
PEEK-Polyetheretherketone	14,500
Nylon Cast	13,000
PPS-Polyphenylene sulfide	12,500
PA-Nylon Extruded	12,000
PET-P Polyester	11,750
PPSU-Radel	10,100
PSU-Polysulfone	10,050
POM-Acetal Homopolymer	10,000
PC-Polcarbonate	10,000
Acetal Copolymer	9,750
PMMA-Acrylic	9,000
PVC-Polyvinyl Chloride	7,500
PVDF-Polyvinylidene fluoride	7,000
ABS-Acrylonitrile Butadiene Styrene	5,100
UHMW- Polyethelene	5,000
HDPE-Polyethelene	4,000
PTFE-Teflon	3,500
PP-Polypropylene	3,500