Translated Standard: Chinese
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1. Scope

1.1 These test methods cover the color, trash content, micronaire, length, length uniformity, strength and elongation of cotton fibers using the Spinlab System HVI 900 SA or the Motion Control, Inc. Systems HVI 3500 and HVI 4000 that are a series of instruments connected to single dedicated programmed computers.

1.2 These test methods are applicable to loose fibers taken from raw or partially processed cotton and some types of cotton waste.

1.3 These test methods contain the following sections:

1.4 The values stated in both inch-pound and SI units are to be regarded separately as the standard. The values given in parentheses are for information only.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.5 This test method covers the comparison of the color of raw cotton with the official standards of the United States Department of Agriculture for Color Grade of cotton by means of a cotton colorimeter of the Nickerson-Hunter type. It can be used to measure the color of any type of raw cotton but is particularly applicable to Upland and American Pima cotton, for which official grade Standards have been established.

1.6 The instrument employs the use of a programmable microprocessor with memory for controlling internal operations and performing required calibration, calculation, and data presentation. Note 1For another method describing the measurement of the color of raw cotton, refer to Test Method D 2253.

1.7 This test method describes the measurement of the amount of trash as seen by a video camera focused on the surface of a test specimen of cotton pressed against a glass window. Note 2For another method describing the measurement of trash or non-lint content of cotton, refer to Test Method D 2812.

1.8 The instrument may be incorporated within the space occupied by and adjacent to the apparatus to measure color of raw cotton (see Sections ), thus permitting simultaneous measurement of color and trash on the same test specimen.

1.9 This test method describes the determination of the micronaire of loose cotton by measuring the resistance of a plug of cotton to air flow under prescribed conditions. The instrument employs a programmed microprocessor with memory for controlling internal operation and performing required calibration, adjustments, calculations, and data presentation. For another method describing the determination of micronaire, refer to Test Method D 1448.

1.10 The measurement of length and length uniformity is made by outputting a voltage directly proportional to the amount of fiber in the prepared specimen at a given distance from the base of the test beard. The Spinlab system uses a fibrograph-type photo electrical instrument. The Motion Control system uses a length analyzer pneumatic instrument. Note 3For another method describing the measurement of cotton fiber length, refer to Test Method D 1447.

1.11 This test method describes the determination of the breaking tenacity and elongation at the breaking force of cotton fibers in a test specimen in which fibers have been placed randomly in a specimen comb or clamp and broken using (3.2-mm) 1/8-in. clamp spacing. In the cotton textile industry, this physical property is usually called 'strength'. Note 4 For other methods covering the measurement of cotton fiber strength, refer to Test Method D 1445.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D123 Terminology Relating to Textiles

D1441 Practice for Sampling Cotton Fibers for Testing

D1445 Test Method for Breaking Strength and Elongation of Cotton Fibers (Flat Bundle Method)

D1447 Test Method for Length and Length Uniformity of Cotton Fibers by Photoelectric Measurement

D1448 Test Method for Micronaire Reading of Cotton Fibers

D1776 Practice for Conditioning and Testing Textiles

D2253 Test Method for Color of Raw Cotton Using the Nickerson-Hunter Cotton Colorimeter

D2495 Test Method for Moisture in Cotton by Oven-Drying

D2812 Test Method for Non-Lint Content of Cotton

D3025 Practice for Standardizing Cotton Fiber Test Results by Use of Calibration Cotton Standards

D4848 Terminology Related to Force, Deformation and Related Properties of Textiles

D7139 Terminology for Cotton Fibers

E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

Keywords

color; cotton; elongation; fineness; HVI; length; micronaire; strength; tenacity; trash; uniformity;

ICS Code

ICS Number Code 59.060.10 (Natural fibres)

DOI: 10.1520/D5867-05

ASTM International is a member of CrossRef.