Foreword
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This standard is developed in accordance with the rules given in GB/T 1.1-2009.
This standard is an integrated revision of QB/T 2695-2005 and FZ/T 82005-1999, and has the following main changes with respect to them:
——The standard name is modified;
——The applicable scope is expanded;
——The method of describing requirements is modified;
——The appearance quality inspection items are modified and added/deleted;
——The indexes for physical and mechanical properties are modified;
——The test methods for appearance quality are modified;
——The requirements and test methods for colour fastness are added;
——The requirements and test methods for mass (fixed weight) are added;
——The product quality judgment is added;
——The method of describing the inspection rules is modified;
——Normative Annex A Conversion method between fixed weight and fixed length is added.
This standard was proposed by China National Light Industry Council.
This standard is under the jurisdiction of the National Technical Committee on Footwear of Standardization Administration of China (SAC/TC 305).
This standard replaces QB/T 2695-2005 and FZ/T 82005-1999.
The previous editions of QB/T 2695-2005 are as follows:
It was released as the original specialized standard ZB/TY 78007-1990 Threads for leather shoes in 1990, converted into the professional standard QB/T 3642-1999 in 1999, and first revised in 2005.
The previous editions of FZ/T 82005-1999 are as follows:
It was released as the original specialized standard ZB/Y 78002-1986 Threads for cloth shoes in 1986 and was converted into the professional standard FZ/T 82005-1999 in 1999.
Threads for shoes
1 Scope
This standard specifies the product classification, requirements, test methods, inspection rules and judgment, as well as marking, packaging, transportation, and storage of sewing threads used for sewing uppers and soles of shoes.
This standard is applicable to sewing threads used for sewing uppers and soles of general shoes.
This standard is not applicable to sewing threads used for sewing uppers and soles of shoes for labor, protection and special purposes.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 250 Textiles - Tests for colour fastness - Grey scale for assessing change in colour (GB/T 250-2008, ISO 105-A02:1993, IDT)
GB/T 251 Textiles - Tests for colour fastness - Grey scale for assessing staining (GB/T 251-2008, ISO 105-A03:1993, IDT)
GB/T 3916 Textiles - Yarns from packages - Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester (GB/T 3916-2013, ISO 2062:2009, MOD)
GB/T 4743-2009 Textiles - Yarn from packages - Determination of linear density (mass per unit length) by the skein method (ISO 2060:1994, MOD)
GB/T 3921-2008 Textiles - Tests for colour fastness - Colour fastness to washing with soap or soap and soda (ISO 105-C10:2006, MOD)
FZ/T 32006-2003 Ramie grey yarn
3 Product classification
3.1 Classification by using parts:
——Threads for upper (including inner thread for sewing boots felt);
——Sewing threads for sole (including sewing thread for rib and shovel);
——Thick threads for upper decoration.
3.2 Classification by materials:
——Natural fiber threads: silk thread, cotton thread, cotton glazed thread and ramie thread;
——Synthetic fiber threads: nylon thread, polyester thread, vinylon thread and acrylic thread.
——Hybrid threads: polyester-cotton thread and core spun thread.
4 Requirements
4.1 Appearance quality
The appearance quality of threads for shoes shall meet those specified in Table 1.
Foreword i
1 Scope
2 Normative references
3 Product classification
4 Requirements
5 Test methods
6 Inspection rules and judgment
7 Marking, packaging, transportation and storage
Annex A (Normative) Conversion method between fixed weight and fixed length
