Standard No.:	GB/T 24121-2009
English Name:	Textile products—Determination of the remains of broken sewing needle
Chinese Name:	纺织制品 断针类残留物的检测方法
Chinese Classification:	W04    Basic standards and general methods
Professional Classification:	GB    National Standard
ICS Classification:	59.080.01 59.080.01     Textiles in general 59.080.01
Issued by:	CNTAC
Issued on:	2009-6-15
Implemented on:	2010-2-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	3000 words
Price(USD):	130.0
Delivery:	via email in 1 business day

1 Scope This Standard specifies determination of the remains of broken sewing needle or ferromagnetic metal in textile products by metal needle detector. This Standard is applicable to textile products as manufactured and processed. Raw material, semi-finished product and other products may also refer to it. 2 Principle Induction of the remains of broken sewing needle or ferromagnetic metal will occur in textile products in the principle of electromagnetic induction, and thus being detected. 3 Detection Equipment 3.1 Detection equipment Detection equipment with appropriate configuration form and sensitivity is selected according to detection property, type of the detected textile products as well as the requirements of relevant standards. 3.1.1 Conveyor-type metal needle detector: it is usually used either for manufacturing and processing enterprises of textile products to determine such ferromagnetic materials as iron pin and scrap iron left in textile products, or for detection organization to determine the remains of broken sewing needle or ferromagnetic metal in textile products. Common detection sensitivity (standard iron ball test card, also known as standard needle test block): 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm and 3.0mm.

Foreword I 1 Scope 2 Principle 3 Detection Equipment 4 Sample Preparation 5 Operation Procedures 6 Test Report Appendix A (Normative) Calibration Method for Needle Detector