Fabric weight standard test method for Mass Per Unit Area (weight) of fabric using ASTM Test Method D Designation: D /DM – 09a Standard Test Methods for Mass Per Unit Area (Weight) of Fabric1 This standard is issued under the?xed. ASTM D/DMa(). Standard Test Methods for Mass Per Unit Area (Weight) of Fabric. standard by ASTM International, 07/15/.
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Standard Test Method f ASTM Asmt seam str A number in parentheses indicates the year of last reapproval. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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. Fabric mass is also sometimes expressed inversely as linear metres per kilograms yards per pound with the fabric width stated. Summary of Test Methods 4. The accuracy of the scale should be certi?
ASTM D / DM – 09a() Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
It may be impractical to condition the specimens in Option A or nonconditioned testing may be agreed upon by the purchaser and supplier. When the full rolls or bolts of fabric cannot be properly conditioned in a reasonable time with available facilities, perform the tests without conditioning and report the actual conditions prevailing at the time of the test.
Such results may not correspond with the results obtained after testing adequately conditioned specimens in the standard atmosphere for testing textiles.
Current edition approved July 1, Replaces Sections 35 to 41 of Methods D — 64 Originally approved in Last previous edition approved in as D — No further reproductions authorized. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens which are as homogeneous as possible and which are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing.
If a bias is found, either its cause must asfm found and asrm or the purchaser and the supplier must agree to interpret future test results in the light of the known bias. Consider rolls of fabric to be the primary sampling units. Consider the rolls of fabric in the lot sample as the laboratory sample and as the test specimens. Option B—Full Width Sample 8.
Consider the roll of fabric to be the primary sampling units. The cut edges satm be a straight line, free of indentations or bulges, unless both edges have been made to trace parallel?
Fabric Weight ASTM Test Method D3776
In this procedure the complete laboratory sample is used as the specimen. Mass per d376 area: Mass per linear yard: Option C—Small Swatch of Fabric 9.
The results are considered to be applicable to the sample only and not necessarily to the lot from which the sample was taken. Prepare such specimens from small swatches as is possible. If insufficient fabric is available to meet these criteria, d3776 that fact in the report. D3767 die-cut specimens, the area of the die is normally given.
For other specimens, multiply the length by the width. Specimens of a fabric may be weighed together. Option D—Narrow Fabrics These fabrics are usually mm 12 in. Consider the rolls of fabric to be the primary sampling units. Take a minimum of three such laboratory samples from different places, distributed as evenly as practicable along the length of the roll or piece.
In this procedure a complete laboratory sample is used as a specimen.
ASTM D – 96 Standard Test Methods for Mass Per Unit Area (Weight) of Fabric
Describe the material or product sampled and the method of sampling used. Precision and Bias Seersucker Gingham Corduroy Denim 0. NOTE 2—The tabulated values of the critical differences should be considered to be a general statement, particularly with respect to betweenlaboratory precision.
Before a meaningful statement can be made about two speci? Weights of unconditioned fabric will be affected by the past history of the product. Two operators in each laboratory each tested two specimens of d37766 material for mass per unit area.
The components of variance for fabric mass per unit area expressed as standard deviations were calculated to be as follows: Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
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