Low-Temperature Flexible TPU Cable Compound | Cold-Resistant Cable Jacket & Strain Relief

Short Description:

Cold-resistant TPU series for cable jackets and strain relief boots, maintaining flexibility and toughness down to −30 °C. Ideal for cold climate, robotic, and outdoor power cables.

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Product Detail

Low-Temperature Flexible TPU Cable Compound – EX-LT Series

TPU-EX-LT series is engineered for cable jackets and strain reliefs that must remain flexible and tough in cold climates,
maintaining bending durability down to −30 °C.

This page focuses on the most common low-temperature failure risks—cold cracking, stiffness increase, and early fatigue—
and how grade positioning and processing choices reduce trial risk.

Ideal for cold-region power/control cables, robotic/drag-chain cables, and outdoor extension cords,
where jacket flexibility and handling safety matter in winter conditions.

Many “winter cable” failures are not caused by abrasion alone.
The root is often a loss of flexibility at low temperature that leads to higher bending stress,
then micro-cracking and fatigue—especially at tight radii, molded exits, and strain relief areas.

Cold-Resistant
Cold Flex to −30 °C
Flexible
Abrasion-Resistant
Strain Relief
Shore 80A–90A

Typical Applications

Flexible power and control cables for cold regions
Charging cables and extension cords for outdoor use
Robot / drag-chain cables requiring dynamic bending in low temperatures
Molded strain relief boots and plug exits needing cold-weather performance

Quick Grade Selection (Shortlist)

Choose “85A LT (Jacket Focus)” when

Cable jacket flexibility at low temperature is the key requirement
Outdoor power/control cables must stay safe to bend and handle in winter
You want a stable extrusion grade positioned for jackets in cold zones

Choose “90A LT (Strain Relief / Boot Focus)” when

You need improved tear strength and fatigue durability at exits and molded boots
Injection molding / overmolded strain relief is part of the cable design
A smooth matte surface or anti-block behavior is preferred

If your cable is also a high-cycle moving cable (robot / drag-chain) in cold conditions,
prioritize flex-life validation at your real bending radius and travel distance.

Note: Grades are reference directions. Formulations can be adjusted for hardness, surface finish and flowability.

Common Failure Modes (Cause → Fix)

Low-temperature reliability is usually limited by flexibility loss and stress concentration at bends and exits.
Use the table below as a quick diagnostic.

Failure Mode	Most Common Cause	Recommended Fix
Cold cracking during bending	Jacket becomes too stiff at low temperature; stress rises at tight radius	Use LT-positioned grades; validate bending at −30 °C on finished cable
Early fatigue in moving cables	Low-temp stiffness + repeated motion increases cyclic stress	Choose flex-life focused LT grades; confirm cycles at real radius and travel distance
Tear at exits / strain relief area	Stress concentration + insufficient tear strength in cold conditions	Use 90A LT for boots/exits; optimize geometry and overmolding conditions
Surface defects / unstable extrusion	Moisture, temperature drift, or inappropriate cooling	Dry thoroughly; stabilize melt temperature; tune cooling and line speed by hardness

A reliable low-temperature cable system is designed to keep cold flexibility while preserving
toughness and repeatable extrusion / molding behavior.

Typical Grades & Positioning

Grade	Hardness	Key Performance	Processing	Typical Use
TPU-EX 85A LT	85A	Cold-flexibility to −30 °C, abrasion resistance	Extrusion	Cable jackets for outdoor & cold zones
TPU-EX 90A LT	90A	Fatigue durability, tear strength, smooth matte surface	Extrusion / Injection	Strain reliefs and molded boots

Note: Data are reference only; formulations can be adjusted for hardness, surface finish, and flowability.

Key Design Advantages

Maintains flexibility and toughness at sub-zero temperatures
Excellent abrasion and fatigue resistance for moving cables
Compatible with standard cable extrusion lines
Matte or glossy surface achievable via die design

Processing & Recommendations (3-Step)

1) Dry

Dry before extrusion or injection to reduce bubbles, surface defects and process instability.
Reference: 80 °C × 2 h (adjust to your dryer capability and pellet moisture).

2) Control Heat & Cooling

Keep a stable melt profile for surface quality. Typical melt temperature range:
180–200 °C. Tune cooling (water bath / air tunnel) with line speed and hardness.

3) Validate at −30 °C

Validate on finished cables and molded exits at low temperature: bending, fatigue, and tear at the strain relief area.

Geometry matters: Tight radius and sharp transitions amplify stress—confirm design + material together.
Moving cable note: If used in robot/drag-chain, validate with real travel distance and cycle target.
Verification: Do not rely only on resin-level claims; test on the finished cable assembly.

Is this page for you?

You will benefit most if:

Your cable must stay flexible and safe to bend in winter or cold-region service
You see cracking, stiffness increase, or fatigue issues at low temperature
You need a low-temperature TPU grade shortlist for jackets and strain relief boots
You want stable extrusion/molding recommendations to reduce trial risk