Overview
SIST EN ISO 10528:1999, titled Textiles - Commercial laundering procedure for textile fabrics prior to flammability testing, is an international standard developed by CEN and ISO Technical Committee ISO/TC 38. The standard specifies reproducible methods to assess the impact of repeated commercial laundering processes on the flammability characteristics of textile fabrics. This procedure ensures that commercial laundering conditions are adequately simulated before the flammability testing of textile materials, providing reliable data on how laundering affects ignition and burning behavior.
The standard employs automatic washing machines with horizontal rotating drums or small-scale laundry drums (wash wheels) under controlled conditions using soft water and low-foaming detergents. The procedure addresses the need for consistency and severity in wash cycles to reflect commercial laundering outcomes and to support the evaluation of flame retardant treatments’ durability.
Key Topics
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Scope and Purpose
SIST EN ISO 10528:1999 focuses on simulating commercial laundering to study its effect on the flammability of textiles, supporting fire safety assessments in textiles used for garments, upholstery, and technical applications.
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Washing Machines, Types and Specifications
- Type A (Automatic machines): Horizontal rotating drum capacities from 480 mm to 610 mm diameter, operating at 30–52 rpm with reversing action.
- Type W (Wash wheel): Small-scale, steam-heated drum with frequent reversing.
These machines simulate commercial washing dynamics under repeatable laboratory conditions.
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Water Quality and Detergents
- Soft water with a maximum hardness of 20 mg/L as calcium carbonate is specified.
- Low-foaming detergent with sodium perborate added to ensure sterilization level cleaning comparable to hospital laundry conditions.
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Wash Procedures
- Standard wash at 75 ± 3 °C simulating hospital sterilization conditions for harsher laundering effects.
- Reduced wash at 40 ± 3 °C for delicate fabrics to control shrinkage and fiber damage.
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Testing Load Composition
The wash load includes at least 50% test fabric blended with polyester ballast fabric, sized to meet flammability test specimen requirements.
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Rinse and Drying Methods
Multiple rinse cycles follow washing, with controlled drying and pressing to prepare specimens for flammability testing as per ISO 6330 drying instructions.
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Reporting Requirements
The test report must specify washing machine type, drum volume, detergent used, washing procedure (standard or reduced), drying method, and note any procedure deviations.
Applications
SIST EN ISO 10528:1999 is essential for laboratories and manufacturers involved in:
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Fire Safety Testing
Ensuring textile materials are tested for flammability after conditions that simulate commercial laundering reflects real-world use.
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Quality Control
Evaluating the durability and effectiveness of flame retardant finishes after multiple laundering cycles.
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Textile Product Development
Supporting the design of safer textile products by assessing how commercial washing impacts flame resistance.
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Regulatory Compliance
Meeting legal or market requirements to demonstrate textiles’ fire retardancy after commercial laundering.
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Healthcare and Hospitality Textiles
Testing linens and uniforms for sterilization compatibility and maintaining flame retardant properties post-laundering.
Related Standards
- ISO 6330: Domestic washing and drying procedures for textiles, related to household laundering effects prior to flammability testing.
- ISO 12138: Future publication covering domestic laundering procedures using hard water.
- ISO 6941: Measurement of flame spread properties of vertically oriented textile specimens, often used in sequence with EN ISO 10528.
- ISO 675: Determination of dimensional change on commercial laundering of woven fabrics, relevant for fabric behavior during washing.
This standard is a critical reference for textile manufacturers, testing laboratories, and safety regulators aiming to ensure reliable, reproducible simulation of commercial laundering impacts on textile flammability. It enhances product safety by enabling consistent pre-flammability conditioning aligned with real-life textile care practices.