PUL and TPU are often used together in product discussions, but they do not answer the same question. A buyer needs to understand whether a supplier is naming a finished textile construction, a film material or simply using a trade term in a quotation. The safe approach is to specify the complete material construction for the product being developed, then confirm it through samples and the documentation available for that exact material.
1. Why the terminology is confused
PUL is commonly used to describe a fabric with a laminated waterproof layer. TPU is a material term that may describe the film used in a laminate. In ReuseCare’s published lamination process, the construction begins with a polyester or cotton base fabric and uses a TPU film. That explains why a buyer may see both terms in a single sourcing conversation: one can refer to the finished textile construction while the other refers to a layer in that construction.
Terminology alone does not define performance. Two suppliers can use the same label while quoting different base textiles, film weights, bonding approaches or finished specifications. Do not assume that a product called “PUL” has the same handfeel, weight, care profile or suitability as another product with the same label.
2. Specify the full construction
Ask the supplier to identify the construction in a form that can be compared across samples and orders. Start with the base fabric: fibre content, knit or woven structure, colour and any required surface characteristics. Then ask how the waterproof layer is described, what the finished width and weight are, and whether those values apply before or after the laminate process.
- Base fabric fibre, construction and intended skin-contact or outer-face use.
- Waterproof layer or film description and the finished laminate construction.
- Finished width, weight and any relevant colour or print reference.
- Proposed use: cloth diaper cover, menstrual pad layer, wet bag or another product.
- Sample version, batch identification and available material documentation.
For PUL fabric projects, use the current PUL fabric product page as the starting point for the listed range and order discussion. The final quote should repeat the actual specification being supplied rather than relying on a generic category name.
3. Compare a quoted construction, not an acronym
When reviewing alternatives, place the specifications side by side. A buyer may care about stretch, drape, surface appearance, sewing behaviour, finished product weight, intended wash routine or the compatibility of the laminate with the chosen product design. These are construction and product questions, not a simple PUL-versus-TPU choice.
Be cautious about transferring a result from one sample to another. A result seen on a specific textile, film, colour or production batch should be documented as applying to that sample or batch unless the supplier confirms otherwise. This is especially important when the base cloth, print, material source or construction changes after the original sample.
4. Use product-specific verification
Testing is most useful when the method, sample and acceptance expectation are stated in advance. ReuseCare’s fabric waterproof testing guide shows the value of recording the sample, preparation, equipment, duration and pass criterion. It should be used as a question framework for your project, not as a promise that every material or future batch will perform identically.
Likewise, the PUL lamination process guide explains the published polyester-or-cotton base fabric and TPU-film construction. Link this process information to the sample specification you approve, so the product, material, inspection and packaging records all refer to the same version.
5. Questions to include in an RFQ
- What is the exact base fabric and finished laminate construction being quoted?
- Which finished width and weight apply to this colour, print and batch?
- Which product use is the material intended to support?
- What sample version will be supplied for review, and how will it be identified?
- Which test method, preparation, duration and acceptance criterion are proposed if testing is required?
- What material or compliance documentation is available for the requested market?
- Which choices could change the price, minimum order or production timing?
6. Make the decision traceable
Choose the construction that suits the approved product brief, not the acronym that sounds most familiar. Keep the material specification, sample version, notes from any test, artwork reference and quote together. This creates a practical record for sampling, production and later repeat orders. When you are ready to compare options, send those details through the quote request form so the discussion can be based on the specific construction you need.