Basis weight is an important starting point when sourcing pouch nonwoven, but GSM alone is not enough to qualify a material. Two materials can share a similar basis weight and still require separate review because buyers also need to consider product identity, thickness, composition, roll format, converting behavior, documentation, and the intended line trial.
For procurement and engineering teams, the practical question is not simply “Which GSM should we buy?” It is “What complete material specification should we compare before we put a sample on our equipment?”
What basis weight tells you
Basis weight describes the mass of a material per unit area and is commonly expressed as grams per square metre (gsm). It is useful because it gives buyers a consistent field for identifying and comparing material options.
However, basis weight should be treated as one field in a broader product definition. It does not by itself describe how the material will feel, how thick it is, how it is constructed, how it is supplied on a roll, or how it will behave during the buyer’s own qualification work.
1. Confirm the exact material identity
When a supplier proposes a pouch nonwoven, ask for a clear product or grade identity rather than relying on a description such as “34 gsm pouch paper.” The sample, technical document, quotation, and later trial record should all refer to the same identifiable material.
This becomes especially important when several suppliers offer options with similar basis weights. A clear identity helps procurement and quality teams avoid comparing a physical sample against the wrong document revision.
2. Review thickness together with basis weight
Basis weight and thickness are related fields, but they are not interchangeable. Buyers should review the product-specific TDS and record both values when they are available. If two candidate materials have the same basis weight but different thickness values, they should still be treated as different qualification candidates.
The goal is not to assume that a higher or lower thickness is automatically better. The correct question is whether the documented material fits the pouch design and performs acceptably on the buyer’s own equipment.
3. Ask what the material is made from
Material composition is another field that should be understood before a buyer compares samples. Procurement, engineering, regulatory, and quality teams may each need this information for a different reason.
Ask the supplier for the documented composition or material description available for the grade under review. Do not infer composition from appearance, basis weight, or a generic product family name.
4. Define width and roll requirements separately
A material can have the right basis weight and still be impractical for a trial if the supplied roll does not match the project’s required format. Include the required width, roll configuration, and any other receiving requirements in the RFQ.
If a field is not yet fixed, mark it as “to be confirmed.” That is more useful than allowing the supplier to assume a format that may not match the equipment or trial plan.
5. Compare documented sealing and converting information
Pouch nonwoven is ultimately a converting input. Before a line trial, buyers should review the supplier’s product-specific technical information and identify which aspects still need to be validated on the intended equipment.
That review can include heat-sealing qualification, material feeding, cleanliness, finished-pouch appearance, and other project-specific acceptance criteria. Supplier information can help support the trial plan, but it does not replace validation on the buyer’s own equipment.
6. Connect the physical sample to the document package
A useful sample should arrive with enough information for the buyer to know exactly what is being tested. At minimum, teams should be able to connect the sample to the relevant product identity and product-specific TDS.
Depending on the internal review process, buyers may also request available food-contact statements, supplier declarations, safety documentation, and relevant third-party reports. Musenn’s current document route is available on the Certificates & Documentation page.
What about 32 gsm versus 34 gsm?
Musenn currently presents 32 gsm and 34 gsm options publicly. Buyers should not treat those two numbers as a universal “lighter versus better” or “heavier versus stronger” decision. Basis weight alone does not justify that conclusion.
A more disciplined approach is to review the product-specific TDS, confirm the intended application and roll requirements, and then validate the candidate material against the project’s own acceptance criteria.
A better RFQ field set than GSM alone
- Application: the pouch format or relevant use case.
- Material identity: grade or product reference proposed by the supplier.
- Basis weight: current or target direction.
- Thickness: documented value for the candidate material where available.
- Composition: documented material description.
- Required width: confirmed value or to be confirmed.
- Roll requirements: the format information needed for sample and supply review.
- Documents: TDS and other documents required by the buyer’s internal process.
- Trial objective: what the team needs to validate on its own equipment.
For a structured supplier request, use the Pouch Material RFQ Checklist. Buyers who are already planning a line evaluation can continue with the Pouch Material Qualification guide.