Application Guide · TPU Technical Textiles
TPU coated fabric is used when a flexible product needs a textile reinforcement plus a sealable thermoplastic surface. Typical applications include dry bags, inflatable boats, air bladders, pressure-care cushions, marine safety products, flexible tanks, protective equipment and custom welded industrial components.
The same material family can serve very different industries. The correct construction depends on what the final product must hold, how it will be joined, how often it will flex, and what it will contact during service.
Lightweight TPU coated nylon or polyester can be converted into roll-top dry bags, waterproof backpacks, bike bags, soft coolers, equipment pouches and protective covers.
Why TPU is considered: foldability, clean welded seams, abrasion resistance and a premium soft-hand direction.
Double-side TPU constructions are widely discussed for inflatable chambers that need air retention, seam strength and repeated inflation/deflation performance.
Buyer focus: base denier, TPU layer, peel strength, welding window, pressure decay and puncture resistance.
Weldable TPU textiles are used to form air cells, inflatable support cushions, pressure redistribution components and other sealed healthcare support structures.
Buyer focus: air holding, softness, cleaning environment, cyclic flexing and finished-device validation.
Life-jacket bladders, rescue flotation components, buoyancy chambers and selected raft structures can use TPU coated fabric where compact folding and dependable sealed construction are required.
Buyer focus: low permeability, foldability, saltwater environment, seam construction and inspection procedures.
Reinforced TPU coated textiles can be developed for collapsible tanks, pillow tanks, liquid bladders, temporary containment and other welded storage structures.
Buyer focus: contact media, temperature, storage time, coating chemistry, seam design and finished tank testing.
TPU coated polyester can be used for machine protection, reusable covers, flexible sleeves, welded industrial bags, air-handling components and custom technical assemblies.
Buyer focus: dimensional stability, abrasion, cleanability, repeated handling and fabrication efficiency.
Selected TPU textile systems can be used in protective garments, dry-suit components, survival equipment and washable flexible barriers when the formulation and textile construction fit the use environment.
Buyer focus: flexibility, body-fluid or chemical exposure, seam sealing, comfort and applicable compliance testing.
Air compression chambers, inflatable recovery products, training accessories and performance equipment can use TPU coated nylon for lightweight strength and welded air channels.
Buyer focus: cyclic pressure, seam fatigue, skin-side finish, noise and repeated folding.
Many custom products do not fit a standard category. If the design needs a sealed chamber, fluid barrier, clean seam or controlled air path, TPU coated fabric may provide a practical development route.
Buyer focus: send the product drawing, seam method, pressure or liquid contact and target service environment before sample selection.
TPU is not automatically the correct choice for every waterproof product. It becomes especially relevant when several performance and processing requirements must be solved at the same time.
TPU coated fabric is a composite technical textile. The textile and the thermoplastic polyurethane layer do different jobs. The reinforcement carries mechanical load; the TPU layer contributes the functional barrier and thermoplastic surface used for welding or heat sealing.
This is why two rolls labeled “TPU coated fabric” can behave very differently. A lightweight 210D nylon construction for a dry bag does not solve the same problem as a reinforced 1000D or 1680D double-side fabric for an inflatable chamber or flexible tank.
Instead of asking only “what GSM is available?”, start with the final product and work backward to the base fabric, coating side, TPU chemistry and joining method.
| Finished Product | Typical Material Direction | What Matters Most | Questions to Confirm Before Sampling |
|---|---|---|---|
| Dry bag / waterproof backpack | Light-to-medium TPU coated nylon or polyester; often single or double side depending design | Soft folding, seam sealing, abrasion, appearance | Roll-top or zipper design? HF, hot air or heat press? Target weight and hand feel? |
| Inflatable boat / packraft / air chamber | Higher-strength double-side TPU coated textile | Airtightness, peel strength, puncture resistance, seam durability | Working pressure? Chamber size? Seam overlap? Welding equipment? |
| Medical mattress air cell | Soft weldable TPU coated or laminated nylon/polyester | Air retention, flexing, cleanability, surface feel | Pressure cycle? Cleaning agents? Chamber design? Device validation route? |
| Flexible water tank | Reinforced double-side TPU construction selected for water/humidity conditions | Liquid compatibility, seam strength, hydrolysis direction | Potable or non-potable? Temperature? Storage duration? Certification expectations? |
| Oil/fuel bladder | Application-specific reinforced TPU coated fabric | Chemical compatibility, swelling, seam performance, abrasion | Exact liquid? Additives? Contact time? Temperature? Finished bladder test plan? |
| Industrial protective cover | TPU coated polyester where dimensional stability and weldable waterproofing are useful | Abrasion, repeat handling, surface cleaning, cost balance | Outdoor exposure? Sharp edges? Reuse cycles? Sewn, welded or hybrid fabrication? |
The images below use existing DERFLEX website product and application references. They illustrate two ends of the TPU material spectrum: film/lamination work and reinforced welded containment.
TPU film can be laminated to a textile or used as part of a composite construction. Buyers should define film thickness, transparency, surface, bonding route and final welding process.
Flexible bladders need more than a waterproof roll. Contact medium, coating chemistry, textile reinforcement, folding, fittings and welded seams must be validated as a complete system.
One reason TPU coated textiles are selected for technical products is their compatibility with sealed construction. The exact process window depends on the TPU layer, textile base, thickness, surface and equipment.
Commonly evaluated for coated TPU structures that need fast, controlled sealed seams in air-holding or waterproof products.
Useful for continuous seams, larger panels and fabricating equipment designed for thermoplastic coated textiles.
May suit lighter constructions, film laminates, bag components and custom production methods after temperature/pressure trials.
Can be considered for selected small components or specific TPU constructions where equipment and geometry are compatible.
A useful quotation starts with the finished product, not only a GSM target. Clear application data helps DERFLEX narrow the sample direction and avoids comparing rolls that look similar but behave differently after welding or use.
For custom TPU coated fabric, share drawings or photos when possible, especially for inflatable chambers, flexible tanks, pressure systems and products with fittings or complex seam layouts.
Use these six related pages to move from a general application question to a material family, process or finished-product direction.
For B2B projects, the value of a TPU coated fabric supplier is not only the roll itself. It is also the ability to translate a product requirement into a testable material specification and then reproduce that approved direction in bulk supply.
Start from air pressure, liquid contact, flexing, temperature, seam design and the end-product size before narrowing the material.
Compare flexibility and tear-strength priorities with dimensional stability and processing efficiency instead of treating the substrates as interchangeable.
Discuss TPU side configuration, target thickness, surface finish, hardness direction, color and roll format for OEM production.
Confirm seam quality, air retention, peel strength and handling on the buyer's production route before bulk approval.
Record approved width, weight, color, finish, coating structure and packaging details to improve repeat purchasing consistency.
When TPU is not the practical route, DERFLEX can also discuss other coated fabric families according to product requirements and cost targets.
TPU coated fabric is commonly used for dry bags, waterproof backpacks, inflatable boats, packrafts, air bladders, medical air mattresses, pressure cushions, marine safety components, flexible water tanks, oil bladders, industrial covers and other products that benefit from a flexible, waterproof and weldable textile structure.
TPU creates a thermoplastic sealing surface that can be welded into enclosed chambers, while the nylon or polyester reinforcement carries tensile and tear loads. For inflatable products, buyers should validate seam strength, pressure decay, peel strength, puncture resistance and repeated flexing on the finished chamber.
Neither is universally better. TPU coated nylon is often considered when flexibility, soft folding and tear strength are important. TPU coated polyester is often considered when dimensional stability, roll handling and a practical strength-to-cost balance are priorities. The finished product and processing method should decide the substrate.
TPU coated fabric can be developed for air-holding and liquid-containment products, but suitability depends on coating chemistry, thickness, reinforcement, seam design, fittings, temperature and contact medium. Oil or fuel applications require project-specific compatibility testing rather than a general material claim.
Many TPU coated and laminated fabrics can be processed by HF/RF welding, hot-air welding, heat sealing or ultrasonic methods. The correct settings depend on the construction and equipment, so a production trial is recommended before bulk ordering.
Send the finished product type, base fabric or denier preference, coating side, target weight or thickness, roll width, color, surface finish, welding method, air or liquid contact, working temperature, sample request, estimated quantity and any test or documentation requirements.
Share your application, drawing, seam method and working conditions. DERFLEX can help narrow the base fabric, TPU coating structure, sample direction and bulk roll specification for evaluation.