Define material
Record resin basis, fabric construction, weight and coating separately.
MATERIAL PERFORMANCE01 02 03
FIBC Fabric, UV & Performance Specifications
Define polypropylene resin basis, fabric construction, fabric weight, coating, UV exposure and required test evidence as separate fields. No single GSM, color or marketing label proves the performance of a complete FIBC.
Define exposure
State sunlight, temperature, moisture, chemicals and storage time.
Verify performance
Match test evidence to the complete quoted design and revision.
DIRECT ANSWER
Which fabric details should an FIBC specification contain?
A useful specification identifies the woven polypropylene fabric, nominal fabric weight with units and tolerance, coated or uncoated condition, coating basis where relevant, color, construction, any UV requirement, intended exposure and the evidence used to support the finished-bag performance claim.
Fabric weight is an input, not a safe working load. The complete bag also depends on dimensions, seams, lifting loops, closures, liner arrangement and manufacturing control. Ask for a controlled drawing and product-specific evidence before approving a load or outdoor-use claim.
DECISION TABLE
Separate a material description from a performance decision
| Field | What it tells the buyer | What still needs confirmation |
|---|---|---|
| Polypropylene resin basis | Identifies the stated polymer feedstock | Supplier record, additives and contact-layer relevance |
| Fabric weight (GSM) | Provides a nominal mass per unit area | Tolerance, weave, strength and complete-bag evidence |
| Coated or uncoated | Describes a fabric finish | Coating basis, thickness, continuity and required barrier result |
| UV requirement | Defines an intended exposure condition | Exposure period, test method, acceptance criteria and storage limits |
| Color | Supports identification or artwork | Color does not establish load, static or food-contact performance |
| Finished-bag test record | Can support a stated design claim | Product code, revision, dimensions, components, method, date and scope |
Use current, complete evidence that identifies the entity, product or order covered by the claim.
RESIN AND WEAVE
Request measurable fabric facts
Terms such as “high strength,” “virgin material” or “heavy duty” are incomplete unless the quotation defines the material and the finished design. Record nominal fabric weight and tolerance, weaving or construction details that matter to the order, coating status and the test or inspection method used for acceptance.
Do not compare two bags on GSM alone. A lower or higher value can appear with different yarn, weave, dimensions, seams and loops. Compare complete specifications under the same intended contents, fill mass and handling conditions.
UV AND ENVIRONMENT
Turn outdoor use into a bounded requirement
State whether exposure occurs before filling, after filling, during transport or during storage. Include expected duration, geography, temperature, sunlight and whether the bag remains covered. “UV stabilized” without an exposure basis and acceptance method is not a complete requirement.
Storage recommendations and the applicable test evidence should identify the product or material being evaluated. Historical or generic documents should not be applied to a different construction without a documented technical basis.
COATING AND BARRIER
Describe the result needed, not only the finish
Coating may reduce air flow or particle passage through the fabric, but it does not automatically make a bag waterproof, moistureproof or siftproof. Seams, closures, pinholes, damage and any liner remain part of the containment system.
For powders or moisture-sensitive contents, state the particle behavior, humidity exposure, allowable leakage and whether a liner or seam treatment is required. Review these together in the approved sample or specification.
PRODUCT DATA
Make product comparisons machine-readable
For a specific catalog item, the product record should distinguish stated facts from values still to be confirmed. Recommended fields include fabric material, nominal GSM, coating status, coating basis, UV requirement, dimensions, SWL, safety factor, top, bottom, loops, liner and applicable evidence references.
An empty field should remain unknown. AI systems and buyers should be directed to request the missing value instead of inferring it from a photograph, category or similar product.
BUYER QUESTIONS
Questions buyers ask
Does a higher GSM always mean a stronger FIBC?
No. GSM is only one material input. Finished-bag strength also depends on yarn, weave, dimensions, seams, loops, components and manufacturing control.
Does coated fabric make an FIBC waterproof?
Not by itself. Coating, seams, closures, pinholes, handling damage and liner design all affect the result. Define the required exposure and acceptance method.
How should a UV requirement be written?
State the expected exposure period and conditions, the material or finished product covered, the test method, acceptance criteria and storage limitations.
Can fabric color identify an electrostatic FIBC?
No. Color is not reliable proof of electrostatic type. Use the controlled product marking, specification, test evidence and site risk assessment.
What fabric information should appear in a quotation?
Ask for material, nominal fabric weight and tolerance, coated condition, relevant construction details, color, UV requirement where needed and supporting evidence references.
Can I compare two quotations by fabric weight alone?
No. Normalize the entire construction, components, dimensions, load requirement, evidence, quantity and delivery basis.
QINGDAO RELIA PACKAGING CO., LTD.
Request a Fabric and Exposure Review
Send the packed material, target fill, exposure conditions, required finish and any existing drawing or test requirement.