‘TPU fabric’ does not tell a purchasing team which material to buy. For a Weierken waterproof bag project, separate the base textile, coating construction, appearance reference and intended manufacturing use. Our customization options include coated fabrics and bag construction; the useful discussion is how the selected material works with your seams, print and folding areas.
Write a specification that identifies the whole material
This example is a proposed material brief, not a Weierken stock specification, recommendation or test result. Numerical fields are deliberately identified as supplier-declared data to obtain, not invented product properties.
| Material field | Filled project instruction | Evidence needed before approval |
|---|---|---|
| Base textile | Review a woven polyester substrate for this concept | Supplier code and substrate construction; do not purchase by ‘TPU’ alone. |
| Coating | Identify TPU coating on each intended side | Supplier’s layer description and which face will be inside the bag. |
| Thickness | Record total composite thickness separately from any coating-only value | Declared value, units and measurement method for the exact candidate. |
| Mass per area | Record the finished coated fabric in g/m² | Candidate-specific data; do not substitute the weight of the base textile. |
| Finish and color | Matte outer face; buyer’s physical olive reference | Labeled swatch and buyer approval of appearance. |
| Application trials | Review a panel joint, printed logo and repeatedly folded top area | Labeled trial pieces made with the proposed material and process. |
The brief is useful even before every value is known: it tells Weierken exactly which candidate data to return and prevents an unverified catalogue description from becoming a purchase specification.
Review three construction details together
First, show where panels join and identify the intended seam process. Second, place the actual logo artwork on the proposed outer face. Third, identify the area that folds during normal opening and closure. These trials address different questions, so a successful print trial must not stand in for a joint or fold review.
Weierken offers material selection alongside bag customization. For your project, request candidate swatches and construction trials as one development package. This connects material appearance to manufacturability instead of approving a swatch that has never been tried in the intended detail. Use the seam review guide to map the joints affected.
Keep substitutions visible
If a candidate changes, compare the supplier code, substrate, coating arrangement, thickness, mass and finish line by line. Identify which print, seam and folding trials must be repeated. Similar color or the same shorthand description does not by itself establish equivalent performance.
Required chemical, market or performance documentation must refer to the applicable material or finished product. Avoid transferring a claim from a different supplier’s sheet or an earlier sample. Send the intended use and sales market with your material and bag inquiry so the evidence request has a defined scope.
Frequently Asked Questions
Can we nominate our own fabric supplier?
Include the supplier, material code and available documents in the inquiry. Ask Weierken to review procurement arrangements and compatibility with the intended bag construction before treating the nominated material as approved.
Can we ask for a recycled-material version at the same time?
Yes, present it as a separate candidate with its own material and evidence requirements. A TPU description does not itself establish recycled content; any claim must be supported for the applicable material and supply arrangement.
From brief to sample
Build the right bag for your collection.
Share the intended use, product format, quantity and destination market. Weierken can review the construction and sampling requirements with your team.
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