ISO 4606:1995 specifies a strip tensile test method for woven textile glass fabrics to determine tensile breaking force and elongation at break. It is commonly used for quality control, supplier qualification, and materials verification for fiberglass reinforcement fabrics used in composites and industrial laminates.
If you need help matching specimen preparation, gripping approach, or reporting expectations to the exact fabric style you are testing, contact our team to discuss your application.
ISO 4606:1995 — Textile glass — Woven fabric — Determination of tensile breaking force and elongation at break by the strip method
This standard describes how to tensile test frayed strip specimens cut from woven textile glass fabric that has been conditioned in a standard test atmosphere.
It applies to unimpregnated textile glass fabrics and also to textile glass fabrics impregnated with sizing or stiffening materials. It does not apply to fabrics coated with rubber or plastics.
Quick Definition
ISO 4606 is a tensile test method for woven fiberglass cloth that reports the maximum tensile force at break and the elongation at break using strip specimens taken in the warp and weft directions.
What This Standard Covers
ISO 4606 focuses on tensile performance of woven textile glass fabrics using a strip method with frayed edges (to achieve a defined test strip). The method is intended to produce comparable results between labs by controlling specimen conditioning, specimen geometry approach (strip-based), and the way force and elongation at break are determined.
Measured outcomes: Tensile breaking force and elongation at break for specimens taken in fabric principal directions (typically warp and weft).
Key limitations: The method is not intended for textile glass fabrics that are coated with rubber or plastics.
Why This Standard Matters in Testing
Woven glass fabric is frequently specified by mechanical performance in tension, and ISO 4606 provides a standardized way to generate comparable breaking-force and elongation data for acceptance testing and supplier documentation.
For labs and manufacturers, the biggest practical drivers are repeatable gripping (avoiding slippage or premature jaw breaks), consistent specimen preparation, and consistent conditioning so results are meaningful across production lots and between sites.
Common Materials, Product Types, or Applications Covered
This standard is typically applied to woven textile glass (fiberglass) reinforcement fabrics, including:
- Woven fiberglass cloth used as reinforcement in composite laminates
- Glass fabric used in industrial laminates and insulation-related constructions where tensile performance is specified
- Glass fabrics with sizing or stiffening treatments where the fabric remains uncoated (not rubber/plastics coated)
Common Test or Verification Workflow
ISO 4606 is commonly used in a workflow that includes specimen selection from fabric roll or cut sheets, conditioning in a standard laboratory atmosphere, and tensile loading to failure.
Common workflow: Prepare frayed strip specimens (warp and weft) → condition specimens → mount in suitable grips → perform tensile test to rupture using a controlled extension approach → record maximum force and elongation at break → report results for each direction.
Equipment Commonly Used for This Standard
ISO 4606 typically points to a controlled tensile test setup designed to pull woven fiberglass strips to break while maintaining stable alignment and minimizing grip-related failures.
Common equipment: Universal testing machine (tensile tester), appropriate grips/clamps for fabrics, load cell sized to expected break forces, and a means of measuring extension/elongation (via crosshead travel and/or an extensometry approach suited to the specimen and fixture).
Common accessories: Specimen cutting tools/templates, materials and fixtures used for consistent specimen end preparation (when needed for secure gripping), and an environmental conditioning capability consistent with standard atmosphere requirements.
Quoting tip: For equipment selection, the fabric construction (areal weight, weave tightness, stiffness), expected force range, and grip strategy are usually the main drivers of frame capacity, grip type, and load cell selection.
How to Read This Designation or Revision
ISO 4606:1995 identifies ISO standard number 4606 with the 1995 publication year for the current published edition of this document.
This 1995 edition cancels and replaces the earlier ISO 4606:1979 edition. The 1995 edition has been reviewed and confirmed as current (last confirmation noted in 2020).
Revision sensitivity: When a purchase specification or customer requirement cites ISO 4606, match the cited year/edition where possible because permitted specimen preparation details, conditioning references, and reporting expectations can depend on the exact edition.
Related Standards, Methods, or Frameworks when useful
ISO 4606 is specific to woven textile glass fabric and a strip-based approach. If your material is not textile glass, or if it is a coated fabric (rubber/plastics), a different textile tensile standard or a product-specific specification may be more appropriate.
For procurement and test planning, it is common to pair ISO 4606 results with additional reinforcement-fabric checks (for example, mass per unit area, weave style identification, or other customer-defined acceptance criteria) that are defined outside this document.
Get help selecting a tensile test setup for ISO 4606
If you are choosing a tensile frame capacity, grip style, or measurement approach for woven fiberglass strip testing, you can request a detailed quote for a configuration matched to your force range and specimen handling needs.