Potrebujeme váš súhlas na využitie jednotlivých dát, aby sa vám okrem iného mohli ukazovať informácie týkajúce sa vašich záujmov. Súhlas udelíte kliknutím na tlačidlo „OK“.
Standard Guide for Measuring Hairiness of Yarns by the Photo-Electric Apparatus
Automaticky preložený názov:
Štandardné Sprievodca pre meranie ochlpenia priadzí, ktoré Photo, elektrických prístrojov
NORMA vydaná dňa 1.7.2012
Označenie normy: ASTM D5647-07(2012)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.7.2012
Kód tovaru: NS-32020
Počet strán: 3
Približná hmotnosť: 9 g (0.02 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
fiber, fuzz, hairiness, yarn, ICS Number Code 59.080.20 (Yarns)
Significance and Use | ||||||
The photo-electric method for measuring the hairiness of yarns is not recommended for acceptance testing of commercial shipments since experience has shown that results obtained from machines produced by one manufacturer cannot usually be verified by machines produced by another manufacturer. This guide is intended to increase the awareness of the user to available techniques for measuring hairiness. In some cases the purchaser and the supplier may have to test a commercial shipment of one or more specific materials by the best available guide though it has not been recommended for acceptance testing of commercial shipments. If there are differences of practical significance between reported test results for two laboratories (or more), comparative tests should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples that are as homogenous as possible, drawn from the material from which the disparate test results were obtained, and randomly assigned in equal numbers to each laboratory for testing. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found, either its cause must be found and corrected or future test results for that material must be adjusted in consideration of the known bias. There may be a distinct difference in testing speed and tension devices of machines supplied by different manufacturers that may give differences in reported test results. The measurement of hairiness is important to yarn producers. This guide is useful for process control and research of the yarn surface design at an individual manufacturing facility. Hairiness also is used to provide yarn processing machine design, and indications of malfunctioning process equipment, such as rotors, doffing mechanisms, guides, and travelers. It can be used to identify some causes of barreness and shade variation in fabrics. |
||||||
1. Scope | ||||||
1.1 This guide covers the determination of the hairiness of most filament and spun yarn using a photo-electric sensor apparatus. It is not intended for use on novelty yarns. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. |
||||||
2. Referenced Documents | ||||||
|
Historická
1.7.2013
Historická
1.7.2013
Historická
1.2.2012
Historická
1.7.2012
Historická
1.7.2012
Historická
1.7.2012
Posledná aktualizácia: 2024-12-22 (Počet položiek: 2 217 000)
© Copyright 2024 NORMSERVIS s.r.o.