ASTM D1909-13(2020) - 1.6.2020
 
Significance and Use

4.1 The value listed for the commercial moisture regain and commercial allowance of a specific fiber type is not an experimentally determined quantity but a purely defined value arrived at for commercial purposes by interested parties. The actual moisture regain values of textile materials, when in moisture equilibrium with the standard atmosphere for testing, can deviate from the listed values. Equilibrium moisture regain values depend upon the previous history of the material. The actual finish content of textile materials can deviate from the listed values (see Test Method D2494).

 
1. Scope

1.1 These tables list the commercial moisture regains and commercial allowances commonly used for a number of textile fibers. Such moisture regain and allowance values are intended primarily for determining the commercial weight of a specific fiber when the fiber is bought or sold on this basis. These regain and allowance values also are used in calculating the linear density of yarn in procedures employing such factors and in the quantitative analysis of fiber blends.

1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

D4920-13

Standard Terminology Relating to Conditioning, Chemical, and Thermal Properties (Withdrawn 2022)

D2720-94(2000)

Standard Practice for Calculation of Commercial Weight and Yield of Scoured Wool, Top, and Noil for Various Commercial Compositions

BISFA

Terminology of Man-made Fibers

D2118-18

Standard Practice for Assigning a Standard Commercial Moisture Content for Wool and its Products

D2494-13(2020)

Standard Test Method for Commercial Mass of a Shipment of Yarn or Manufactured Staple Fiber or Tow

D123-23

Standard Terminology Relating to Textiles