## 1、 **Aliphatic Thermoplastic Polyurethane (Aliphatic TPU)** A high-performance thermoplastic elastomer synthesized using aliphatic diisocyanates as the key hard segment monomers. Its molecular backbone contains no aromatic rings (benzene rings), endowing it with superior UV resistance, anti-yellowing, and long-term weatherability compared to aromatic TPU. **Classification (by soft segment)** – Polyester-based aliphatic TPU – Polyether-based aliphatic TPU – Polycarbonate-based aliphatic TPU **Key monomers** – HDI (Hexamethylene Diisocyanate) – IPDI (Isophorone Diisocyanate) – H12MDI (4,4′-Methylenebis(cyclohexyl isocyanate))
## 2、（Core Properties） 1. **Anti-yellowing & UV resistance**：Exceptional resistance to UV radiation and oxidation; maintains transparency and color stability for long-term outdoor exposure . 2. **Weatherability**：Withstands high UV, high temperature, humidity, and chemical erosion; long service life (often >10 years warranty) . 3. **Mechanical properties**：Excellent flexibility, elasticity, rebound resilience, abrasion resistance, and tear strength; good low-temperature performance . 4. **Optical properties**：High transparency, low haze, and good light transmittance (>92% in laminated glass applications) . 5. **Biocompatibility & hypoallergenic**：Suitable for skin-contact and medical applications; odorless and non-irritating . 6. **Chemical resistance**：Resistant to oils, solvents, acids, alkalis, and hydrolysis . #
# 3、（vs. Aromatic TPU） | Characteristic | Aliphatic TPU | Aromatic TPU | | Chemical Structure | No benzene rings; aliphatic diisocyanates (HDI, IPDI) | Contains benzene rings; aromatic diisocyanates (MDI, TDI) | | Anti-yellowing/UV | Excellent; no yellowing under UV | Prone to yellowing/oxidation | | Mechanical Strength | Good flexibility/elasticity; lower hardness | Higher rigidity/strength; better wear resistance | | Cost | Higher | Lower | | Main Applications | High-end PPF, medical devices, optical films, automotive interiors | General industrial parts, shoe soles, low-end protective films |
## 4、（Typical Applications） 1. **Automotive** – Paint Protection Film (PPF) / clear bra – Interior trim (instrument panel skins, seat components) – Window films, skylight armor, laminated glass interlayers 2. **Medical & Healthcare** – Medical catheters, surgical instrument packaging – Skin-contact components (wearable device straps) – Sterilizable parts (121°C steam sterilization compatible) 3. **Optics & Electronics** – High-transparency protective films, screen protectors – LED components (light covers, light guides) – Consumer electronics housings and overmolded parts 4. **Sports & Consumer Goods** – Foamed midsole for sports shoes (low density, high elasticity) – Goggles, watchbands, outdoor protective films 5. **Industrial** – Surface protection films, ballistic glass – Molded parts, textile coatings, wear-resistant components
## 5、（Processing & Forms） – **Forms**：Pellets, films, sheets, powders – **Processing methods**：Injection molding, extrusion, film blowing, calendering, overmolding – **Advantages**：Compatible with conventional thermoplastic processing; fast cycling, high-flow, and low-density grades available
Post time: Mar-27-2026