Materials

LDPE / HDPE

Low density polyethylene (LDPE) is an integral part of Poly Hi Solidur’s polyolefin product line. LDPE is more flexible than HDPE, which makes it a good choice for prosthetic devices, most of which are either drape formed or vacuum formed. Its impact resistance makes it a natural for impact pads, while its easy machinability makes it a good choice for fabricated parts where chemical and corrosion resistance is demanded.

 Characteristics:

• Light-weight

• Good impact resistance

• Extremely flexible

• Easily cleaned

• Thermoforming performance

• Meets food handling guidelines

• No moisture absorption

• Chemical-and corrosion-resistant

End uses of LDPE include:
• Industries: Industrial, Medical, Thermoforming
•Applications: Die Pads, Hinges , Impact pads, Orthotic and Prosthetic devices, Thermoformed parts 

LDPE is stress relieved and a “natural” color. It is available in 48″ x 96″ sheets with gauge sizes ranging from 1/16″ to 1″.

 

Physical
Properties

Method
ASTM

Unit
SI

Value
SI

Unit
English

Value
English

Melt Index

D-1238

g/10 min

1.25

na

na

Density

D-792

kg/m3

920

lbs/ft3

57.39

Yield Point

D-638

MPa

9.4

psi

1363

Tensile Break

D-638

MPa

13.4

psi

1943

Elongation at Break

D-638

%

515

%

515

Tensile Modulus

D-638

MPa

287

psi

41615

Flexural Modulus

D-790

MPa

197

psi

28565

Flexural Strength

D-790

MPa

8.1

psi

1175

Izod Impact

D-4020

J/m

No Break

ft-lbx/inch

No Break

Tensile Impact

DIN 53448

kJ/m2

843

ft-lbs/in2

401

Hardness

D-2240

Shore D

55

Shore D

55

Melt Point

D-3417

°C

110

°F

230

Heat Deflection

 

 

 

 

 

264 psi

D-668

°C

36.7

°F

98

66 psi

–

–

43.3

–

110

Volume Resistivity

D-257

Ohm-cm

>1015

Ohm-cm

>1015

Surface Resistivity

D-257

Ohm

>1015

Ohm

>1015

Water Absorption

D-570

%

slight

%

slight

 

* Values are averages and are not specifications.
** ASTM test methods are under current procedures.

 

 

 

HDPE (High Density – Polyethylene)
Poly Hi Solidur’s high density polyethylene (HDPE) is used in a variety of applications and industries where excellent impact resistance, high tensile strength, low moisture absorption and chemical- and corrosion-resistance properties are required.

 

Characteristics:

• Light-weight

• Chemical-and corrosion-resistant

• Low moisture absorption

• Non-staining

• Thermoforming performance

• High tensile strength

• Non-toxic

 • Meets FDA/USDA food handling guidelines (natural color)

 

End uses of HDPE include:
Industries: Chemical storage, Liquids storage, Medical, Recreational vehicles, Thermoforming
Applications: Light duty chain guides, Orthotic and prosthetic devices, Secondary containment, Tanks,Thermoformed material handling devices, Water storage

 

Availability: 
Poly Hi Soildur’s HDPE is stress relieved and available in:
• Black, 48″ x 96″ sheets with gauge sizes ranging from 1/8″ to 1″
• Natural: 48″ x 96″ sheets with gauge sizes ranging from 1/16″ to 4″
• Natural: 48″ x 120″ sheets with gauge sizes ranging from 1/8″ to 2″
• Natural: 60″ x 120″ sheets with gauge sizes ranging from 1/8″ to 1″
• Extruded (up to 1″ thick) and pressed sheet (from 18″ through 4″ thick) 

 

 

 

HDPE Rod (High Density Polyethylene)

 

Characteristics:

• Excellent machine ability

• Good chemical and heat resistance (200°F range)

• Low coefficient of friction

• Exhibits outstanding low temperature strength in contrast to Poly-Pro

• FDA approved

• For UV resistance carbon black is added to the HDPE extrusion compound

• Very good abrasion resistance

 

Availability: 
•Colors: Natural White and Black
• Sizes: Up to 20″ diameter
• 24″ and 271/2″- Black color only 

 

HDPE Rod Dia

lb/ft

HDPE Rod Dia

lb/ft

HDPE Rod Dia

lb/ft

1/4″

0.019

2″

1.225

7″

13.500

3/8″

0.043

2-1/4″

1.550

8″

21.428

1/2″

0.076

2-1/2″

1.914

10″

32.000

5/8″

0.120

2-3/4″

2.320

11″

40.000

3/4″

0.172

3″

2.756

12″

46.000

7/8″

0.234

3-1/2″

3.752

14″

63.000

1″

0.306

4″

4.900

16″

80.000

1-1/8″

0.388

4-1/2″

6.202

20″

1.000

1-1/4″

0.478

5″

7.657

24″

195.00

1-1/2″

0.689

5-1/2″

9.265

27.5″

265.00

1-3/4″

0.938

6″

11.626

 

 

 

* Custom cut to length discs available in rod diameters 6″ through 27.5″