TPU 경도 가이드 - 애플리케이션에 맞는 쇼어 A 85A~98A 선택하기

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TPU (Thermoplastic Polyurethane) offers an incredible range of flexibility, from rubber-band elastic to nearly rigid. Understanding Shore hardness ratings helps you select the perfect material for your application. This guide covers everything from Shore 85A to 98A.

TPU 경도 가이드 - 애플리케이션에 맞는 쇼어 A 85A~98A 선택하기

Understanding Shore A Hardness

The Shore A scale measures the hardness of flexible materials. Lower numbers indicate softer, more flexible materials:

  • 85A: Very soft, extremely flexible
  • 90A: Soft, moderate flexibility
  • 95A: Medium-soft, some rigidity
  • 98A: Semi-rigid, limited flexibility

Compared to TPE, TPU offers better layer adhesion and easier printing.

TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application - technical

Shore 85A: Maximum Flexibility

특성

  • Extremely soft and rubbery
  • Excellent elongation (>500%)
  • High elasticity and recovery
  • Most challenging to print

Best Applications

  • Gaskets and seals
  • Phone cases with maximum grip
  • Vibration dampeners
  • Wearable devices

Printing Considerations

  • Requires direct drive extruder
  • Very slow speeds (10-20mm/s)
  • Minimal retraction
  • 220-240°C nozzle temperature

Like nylon, TPU benefits from dry storage.

Shore 90A: Balanced Flexibility

특성

  • Soft but manageable
  • Good elongation (400-500%)
  • Excellent recovery
  • Moderate print difficulty

Best Applications

  • Flexable hinges
  • Footwear soles
  • Protective bumpers
  • Flexible couplings

Printing Considerations

  • Direct drive recommended
  • Moderate speeds (15-25mm/s)
  • Standard retraction settings
  • 220-235°C nozzle temperature

Shore 95A: Semi-Flexible

특성

  • Noticeable stiffness
  • Moderate elongation (300-400%)
  • Good dimensional stability
  • Easier to print

Best Applications

  • Functional prototypes
  • Twistable components
  • Semi-rigid seals
  • Impact-resistant parts

Printing Considerations

  • Can work on Bowden setups
  • Normal speeds (20-30mm/s)
  • Standard settings mostly work
  • 225-240°C nozzle temperature

Shore 98A: Nearly Rigid

특성

  • Minimal flexibility
  • Low elongation (200-300%)
  • High dimensional accuracy
  • Easy to print

Best Applications

  • Semi-rigid enclosures
  • Functional brackets
  • Snap-fit components
  • Impact protection

Printing Considerations

  • Works on most printers
  • Normal printing speeds
  • Standard settings acceptable
  • 230-245°C nozzle temperature

Application Selection Guide

ApplicationRecommendedReason
Gaskets85-90AMaximum sealing
Phone cases90-95ABalance of grip and protection
Hinges90-95AFlexibility without fatigue
Bumpers95-98AImpact absorption
Snap fits95-98APredictable flex
Tires85-90AMaximum grip

자주 묻는 질문

TPU 경도 가이드 - 애플리케이션에 맞는 쇼어 A 85A~98A 선택하기
TPU 경도 가이드 - 애플리케이션에 맞는 쇼어 A 85A~98A 선택하기
How do you know whether TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application fits a part?

TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application fits a part when its load capacity, temperature range, moisture exposure, wear behavior, and processing method match the real service conditions.

What properties should be checked for TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application?

Check strength, stiffness, impact resistance, heat resistance, moisture absorption, dimensional stability, friction, wear, and chemical compatibility.

What is the biggest selection risk for TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application?

The biggest risk is choosing from a datasheet value without considering actual environment, processing method, part geometry, and long-term use.

When should TPU Hardness Guide — Choosing Shore A 85A to 98A for Your Application be tested before production?

Testing is recommended when the part faces load, heat, chemicals, moisture, tight tolerances, regulatory requirements, or a new operating environment.

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