TPU flexible connection: A comprehensive Innovation from materials to structure

I. TPU Flexible Connectors: A Comprehensive Revolution from Materials to Structures

1. Material Breakthroughs: The Art of Balancing Transparency and Performance
TPU (thermoplastic polyurethane) is a block copolymer synthesized through the polymerization of diisocyanates, polyols, and chain extenders. Its molecular structure—composed of soft segments (polyester/polyether polyols) and hard segments (diisocyanates)—grants the material exceptional elasticity and strength. Conventional TPU suffers from limited light transmittance due to light scattering caused by benzene rings in its molecular chains. New-generation TPU flexible connectors achieve breakthrough transparency through the following innovations:

• Aliphatic Isocyanate Substitution: Replaced with aliphatic isocyanates like HDI (hexamethylene diisocyanate) to minimize benzene ring content, achieving light transmittance exceeding 90% (comparable to glass).
• Polycarbonate Polyol Integration: Incorporated polycarbonate chain segments to enhance molecular regularity, reducing light scattering and maintaining transparency at thicknesses exceeding 8mm.
• Anti-Yellowing Additives: Integrated HALS (hindered amine light stabilizers) and UV absorbers, achieving UV resistance grade 4 and preventing yellowing for up to 5 years in outdoor environments.

2. Structural Optimization: Precision Manufacturing and Sealing Design
Transparency in TPU connectors relies not only on materials but also on advanced manufacturing processes:

• Film Welding Technology: Seamless forming of food-grade TPU films via high-frequency or laser welding, eliminating adhesives that degrade optical clarity.
• Embedded Terminal Connections: Terminals made of 304 stainless steel or aerospace aluminum with mirror-grade polishing (Ra ≤ 0.8μm) to minimize light reflection and scattering.
• Dynamic Sealing System: Combines silicone gaskets and hose clamps to ensure leak-proof performance while preventing dust/liquid buildup on inner surfaces.
• Custom Geometry Support: Offers conical, elbow, and tapered designs with a minimum bending radius of 3× pipe diameter for complex pipeline layouts.