Textiles - Commercial laundering procedure for textile fabrics prior to flammability testing
1 Scope
This standard specifies methods for testing the repeated commercial laundering of textile fabrics.
This standard is applicable to assess the possible effect of repeated commercial laundering on the flammability of textile fabrics.
2 Normative references
The following standards contain provision which, through reference in this text, constitute provisions of this standard. At the time of publication, all editions cited were valid. All normative documents are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below.
GB/T 8629-1988 Textiles - Domestic washing and drying procedures for textile testing (neq ISO 6330:1984)
GB/T 8632-1988 Textiles - Woven fabrics - Determination of dimensional change on commercial laundering near the boiling point (neq ISO 675:1979)
3 Apparatus and reagents
3.1 Washing machine
3.1.1 Automatic washing machine (Type A)
It is equipped with a horizontal rotating drum with reversing action. The drum shall have a diameter of 480mm to 610mm and shall be fitted with three or four lifters. It shall rotate at 30r/min to 52r/min and reverse its direction every 10r to 20r. The liquor level shall be capable of being controlled to both low and high levels, giving liquor volumes of 0.3V1, and 0.54V1, where V1, is the volume of the rotating drum (see 5.1). Means shall be provided for heating and controlling the water temperature. This automatic washing machine shall be used in accordance with the procedures specified in Clause 6 or 7.
Note 1: This definition allows the use of a wider range of machines than GB/T 8629. Machines of Type A as specified in GB/T 8629 may be used if they satisfy the liquor level control requirements.
3.1.2 Wash wheel (Type W)
As specified in GB/T 8632, it is used with the procedures specified in Clause 8 or 9. This machine has a different reversing action, reversing every 5r to 10r and is steam-heated.
3.2 Soft water
With a maximum hardness, it is expressed as calcium carbonate, of 20mg/L.
3.3 Ballast
It consists of rectangular pieces in single layers of woven 100% bleached cotton or 100% polyester. Each piece shall measure at least 350mm by 500mm and shall be hemmed along the cut edges to prevent unravelling.
Foreword II
ISO Foreword III
Introduction IV
1 Scope
2 Normative references
3 Apparatus and reagents
4 Composition of the load
5 Preliminary calculations
6 Standard washing procedure: automatic machines (Type A)
7 Reduced washing procedure: automatic machines (Type A)
8 Standard washing procedure: wash wheel (Type W)
9 Reduced washing procedure: wash wheel (Type W)
10 Test report
Annex A (Informative) Parameters for typical washing machines
