100μm Thermoplastic Urethane Film
TPU (Thermoplastic Polyurethane) films are categorized based on their raw material aspect into two types: polyester-based TPU films and polyether-based TPU films.
Polyester-based TPU Films
These films use polyesters as the soft segment, providing high tensile strength and excellent abrasion resistance. They offer superior resistance to oils, chemicals, UV rays, and hydrolysis, making them ideal for industrial, automotive, and apparel applications.
Polyether-based TPU Films
These films use polyethers as the soft segment, delivering high flexibility and elasticity. They feature excellent low-temperature flexibility, transparency, and water vapor permeability, making them suitable for medical, food packaging, and inflatable product applications.
Application Examples
Polyester Type TPU Film Applications
- Apparel and Textiles: Outdoor sportswear and protective clothing with excellent waterproof and breathability properties
- Flexible Electronics: Electrical insulation and mechanical protection for flexible electronics
- Automotive Industry: Airbags, seat covers, door panel covers requiring abrasion and chemical resistance
- Renewable Energy: Photovoltaic films with excellent weather resistance and durability
Polyether Type TPU Film Applications
- Medical Devices: Temporary or permanent implants, catheters with excellent biocompatibility and sterilization capability
- Food Industry: Food packaging applications with excellent water resistance
- Decorative Films: Decorative films and laminates with excellent clarity and gloss
- Sporting Goods: Balls, rafts, and inflatable products requiring flexibility and toughness
Medical Industry Applications
TPU films are widely used in medical applications due to their biocompatible properties, durability, and resistance to sterilization processes.
- Medical device coating for improved lubricity and biocompatibility
- Surgical drapes and gowns for water and sterilization resistance
- Medical packaging for instruments and supplies
- Wound dressings providing moisture barrier and breathability
- Medical adhesives with biocompatible properties
- Blood bags with puncture resistance and durability
Shore A Hardness Properties
Shore A hardness (0-100 scale) is crucial for determining TPU film characteristics:
- Flexibility: Lower values indicate softer, more flexible films
- Tear and Puncture Resistance: Higher values indicate stiffer, more durable films
- Clarity: Lower hardness values provide better transparency
- Adhesion: Influenced by surface energy and material modulus
- Processing: Harder films require higher temperatures and longer processing times
Medical Material Considerations
- Biocompatibility: Positive interaction with living tissues without adverse reactions
- Cytotoxicity: Meets standards to ensure no harmful impact on cells
- Mechanical Properties: Tensile strength, elongation, tear strength, and puncture resistance
- Flexibility: Conforms to body parts and organs
- Sterilization Resistance: Withstands autoclaving, gamma irradiation, and ethylene oxide gas
- Durability: Withstands handling, insertion, and measuring stresses
- Surface Properties: Affects interactions with living tissues and cells
Production Process
- Raw material preparation from polyester/polyether diols, polyols, and diisocyanates
- Polymerization to create TPU prepolymer and final polymer
- Film extrusion through dies to create uniform thickness
- Film cooling and solidification using water baths
- Film treatment and finishing (printing, lamination, embossing)
- Film inspection and quality control testing
- Film packaging onto rolls for shipment
Technical Specifications
| Test Item |
Test Standard |
Unit |
Parameter |
Test Result |
Determination |
| Width | Tapeline | mm | 1270±3 | 1270 | Qualified |
| Thickness | ASTM D3767 | mm | 0.10±0.01 | 0.10 | Qualified |
| Surface | Under the D65 light source, compared with the standard sample visually | / | Both Side: Matt | Matt | Qualified |
| Color | / | Natural color | Natural color | Natural color | Qualified |
| Density | ASTM D792 | g/cm³ | 1.13±0.02 | 1.12 | Qualified |
| Tensile Strength | ASTM D 412/Die C | MPa | CD: >55 MD: >50 | CD: 58.54 MD: 56.03 | Qualified |
| 100% Tensile modulus | ASTM D 412/Die C | MPa | CD: >5 MD: >5 | CD: 5.75 MD: 6.92 | Qualified |
| 300% Tensile modulus | ASTM D 412/Die C | MPa | CD: >12 MD: >14 | CD: 14.14 MD: 20.58 | Qualified |
| Elongation @ break | ASTM D 412/Die C | % | CD: >580 MD: >580 | CD: 625 MD: 560 | Qualified |
| Tearing strength | ASTM D 624 | KN/m | CD: >85 MD: >85 | CD: 104.88 MD: 99.61 | Qualified |
| Melting point | DSC | ℃ | >150 | 163 | Qualified |
| Dyne Value | Dyne pen | dyn/cm | >32 | 34 | Qualified |
| Yellowing resistance rating | ASTM D 1148 | Grade | ≥3 | >3 | Qualified |
| Flame-retardant rating | GB/T 8410-2006 | Grade | A-0 | A-0 | Qualified |
