Alro logo Alro Steel was established in 1948 by Al and Robert Glick and has grown to include Alro Plastics, Alro Industrial Supply and Alro Metals Outlet.

Alro Plastics Product: HYDEX® 4101 & 4101L
(Internally Lubricated)

Size and Availability:

Sheet / Slab stock
- Thickness: ¾”thk, 1”thk and 1-1/4”thk
- Sheet sizes: 24”x 24” and 24”x 48”
- Standard colors: Natural (white) and Black

Rod / Round stock
- Diameter: 1”dia to 2-1/2”dia
- Rod lengths: Varies by diameter
- Standard colors: Natural (white) and Black

Hydex® 4101 and Hydex® 4101L (internally lubricated) represent a family of stock shape plastics with elevated performance over PET-P, Acetal and Nylon. Hydex 4101 is a PBT Polyester with an outstanding set of properties that include; wear resistance, chemical resistance and toughness. Hydex 4101L (Lubricated) is an enhanced version with improved wear, PV range and lubricity over Hydex 4101. In direct comparison to other commonly used plastics, Hydex 4101 and Hydex 4101L have:

Improved Wear and Chemical Resistance Versus Acetals

  • Hydex 4101 and 4101L are compatible with chemicals having a pH range of 2.0 - 9.0, Acetal's range is 4.0 to 9.0
  • Hydex 4101 and 4101L can with stand repeated "CIP" chemical washdown without affecting material performance. Acetal degrades upon repeated contact with aqueous chlorine solutions.
  • Hydex 4101L has 30% higher limiting PV than Delrin AF
  • Hydex 4101L has about two times better wear factor than Acetal
  • Hydex 4101L is approved for direct food contact, Delrin AF is not

Hydex® 4101 and 4101L Features:

  • Hydex 4101 and 4101L have 20% greater impact strength than PET-P
  • Hydex 4101L has about 50% better wear factor than PET-P
  • Hydex 4101L has more than twice the LPV performance than PET-P
  • Hydex 4101L has 50% lower coefficient of friction than PET-P
  • Hydex 4101 and 4101L have moisture absorption of 0.07%
  • Nylon has moisture absorption 15 times greater than Hydex, and can exhibit significant dimensional changes in use.

Hydex® 4101 and 4101L Applications:

  • Fixture block for piston assembly
  • Food piston valve body
  • Positioning blocks
  • Conveyor gears
  • Filler valve component
  • Dispenser nozzle