Laundry Powders (Phosphate Free)
1 Scope
This part of GB/T 13171 specifies product classification, designation, symbols, requirements, test methods, inspection rules, marking, packaging, transportation and storage of laundry powders (phosphate free).
This part is applicable to the laundry powders made by formulation materials without phosphate additives.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 13171. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 6368 Surface active agents — Determination of pH of aqueous solution — Potentiometric method
GB/T 13171.1-2009 Laundry powders (phosphorous)
GB/T 13173-2008 Surface active agents - Detergents - Testing methods
GB/T 13174 Determination of detergency and cycle of washing property for laundry detergents
GB/T 15818 Test method for biodegradability of surfactants
QB/T 2951 Inspecting rules for detergent products
QB/T 2952 Requirements for detergent marks and packaging
JJF 1070-2005 Rules of metrological testing for net quantity of products in prepackages with fixed content
AQSIQ Decree [2005] No.75 "Measures for the Metrological Supervision and Administration of Quantitatively Packed Commodities"
3 Product Classification, Designation and Symbols
According to the product category, laundry powders (phosphate free) specified in this part are divided into general type (A) and concentrated type (B); designation and symbol of each is as follows:
a) General laundry powders (phosphate free), marked as "WL-A";
b) Concentrated laundry powders (phosphate free), marked as "WL-B".
4 Requirements
4.1 Material requirements
Biological degradability of surfactants used in the product formula shall not be lower than 90%, and the degradation reaction shall be recognized as environment friendly (tetrapropylene alkylbenzene sulfonate and alkylphenol polyoxyethylene shall not be used).
4.2 Physical and chemical properties
Physical and chemical properties of laundry powders (phosphate free) shall be in accordance with those specified in Table 1.
Table 1 Physical and Chemical Properties Index of Laundry Powders (Phosphate Free)
Item WL-A WL-B
Appearance Powdery or granular without caking
Apparent density /(g/cm3) ≥ 0.30 0.60
Mass fraction (%) of total actives ≥
Where, mass fraction (%) of nonionic surfactant ≥ 13
— 13
8.5a
Mass fraction (%) of total phosphorus pentoxide ≤ 1.1 1.1
Mass fraction (%) of free alkali (calculated as NaOH) ≤ 10.5 10.5
PH (0.1% solution, 25℃) ≤ 11.0 11.0
a When mass fraction of total actives ≥20%, no requirements on the mass fraction of nonionic surfactant.
4.3 Service properties
Service properties of laundry powders (phosphate free) shall be in accordance with those specified in Table 2.
Table 2 Service Properties Index of Laundry Powders (Phosphate Free)
Item WL-A WL-B
Detergency for specified soiled cloth a, b ≥ Detergency of standard laundry powders
Cycle of washing property b Relative deposit ash rate of standard laundry powders ≤ 3.0
Surface damage of textile washed Shall not heavier than standard laundry powders
a Specified soiled cloth are JB-01, JB-02 and JB-03, required detergency for all of them shall be higher than standard laundry powders.
b Concentration of test solution: 0.2% for standard laundry powders, 0.2% for WL-A sample, 0.1% for WL-B sample.
4.4 Requirements for quantitative packing
Net content of small package laundry powders shall meet the requirements of AQSIQ Decree [2005] No.75.
