FZ/T 73031-2009 English PDF (FZT73031-2009)

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FZ/T 73031-2009: Pressure socks
FZ/T 73031-2009
FZ
INDUSTRY STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 63
Pressure Socks
压力袜
ISSUED ON. NOVEMBER 17, 2009
IMPLEMENTED ON. APRIL 1, 2010
Issued by. Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative References ... 4 
3 Terms and Definitions ... 5 
4 Product Classification ... 5 
5 Requirements ... 5 
6 Test Methods ... 13 
7 Judgment Rules ... 18 
8 Product’s Instructions for Use, Packaging, Transportation and Storage ... 19 
Foreword
This standard was proposed by China National Textile And Apparel Council.
This standard shall be under the jurisdiction of Technical Subcommittee on Knitwear of the
Technical Committee on Textiles of Standardization Administration of China (SAC/TC
209/SC 6).
Chief drafting organizations of this standard. Zhejiang Nai'er Group Co., Ltd., Langsha
Knitting Co., Ltd., Zhejiang Jiamengyi Hosiery Co., Ltd., Gaoyao City Gold Coast Knitting
Factory Co., Ltd. and National Quality Supervision and Inspection Center of Knitted
Products.
Chief drafting staffs of this standard. Shi Jigang, Liu Ailian, Jin Jianming, Yu Jianjun and
Dai Zhengyi.
Pressure Socks
1 Scope
This standard specifies pressure socks’ terms and definitions, product classification,
requirements, test methods, judgment rules as well as product’s instructions for use,
packaging, transportation and storage.
This standard is applicable to appraise the quality of chemical fiber pressure socks
and pressure socks that are interwoven of cotton (wool and chemical fiber blended
yarn) and chemical fiber. Other fiber pressure socks may be referred to this standard.
2 Normative References
The following standards contain the provisions which, through reference in this
standard, constitute the provisions of this standard. For dated reference, the
subsequent amendments (excluding corrigendum) or revisions of these publications
do not apply. However, all parties who reach into an agreement according to this
standard are encouraged to study whether the latest edition of these documents is
applicable. For undated references, the latest edition of the normative document
applies.
GB/T 250 Textiles - Tests for Colour Fastness - Grey Scale for Assessing Change
in Colour (GB/T 250-2008, ISO 105-A 02.1993, IDT)
GB/T 251 Textiles - Tests for Colour Fastness - Grey Scale for Assessing Staining
(GB/T 251-2008, ISO 105-A 03.1993, IDT)
GB/T 2910 (All Parts) Textiles - Quantitative Chemical Analysis
GB/T 2912.1 Textiles - Determination of Formaldehyde - Part 1. Free and
Hydrolized Formaldehyde (Water Extraction Method)
GB/T 3920 Textiles - Tests for Colour Fastness - Colour Fastness to Rubbing
(GB/T 3920-1997, eqv ISO 105-X 12.1993)
GB/T 3921 Textiles - Tests for Colour Fastness - Colour Fastness to Washing with
Soap or Soap and Soda (GB/T 3921-2008, ISO 105-C10.2006, MOD)
GB/T 3922 Textiles - Testing Method for Colour Fastness to Perspiration (GB/T
3922-1995, eqv ISO 105-E 04.1994)
GB/T 4856 Package of Cotton Goods and Knitwear
GB 5296.4 Instructions for Use of Products of Consumer Interest - Instructions for
Use of Textiles and Apparel
GB/T 5713 Textiles - Tests for Colour Fastness - Colour Fastness to Water (GB/T
5713-1997, eqv ISO 105-E 01.1994)
GB/T 7573 Textiles - Determination of pH of the Aqueous Extract (GB/T 7573-2002,
ISO 3071.1980, MOD)
GB/T 8170 Rules of Rounding off for Numerical Values and Expression and
Judgment of Limiting Values
GB 18401 National General Safety Technical Code for Textile Products
GSB 16-2159-2007 Knitwear Standard Depth Scale (1/12)
FZ/T 01053 Textiles - Identification of Fiber Content
FZ/T 01057 (All Parts) Test Method for Identification of Textile Fibers
FZ/T 01095 Textile - Test Method of Elastane Fiber Content
3 Terms and Definitions
For the purpose of FZ/T 73031-2009, the following terms and definitions apply.
3.1
Pressure socks
The socks, with the pressure (mmHg) in the gradient decrease from the ankle to the
sock top, which gives people a sense of pressure when wearing and a sense of
relaxation during the movement.
4 Product Classification
The pressure socks, according to materials, are divided into pressure socks that are
woven of elastic nylon yarn (polyester yarn)/core-spun spandex yarn, pressure socks
that are woven of cotton (wool and chemical fiber blended yarn)/core-spun spandex
yarn, and pressure socks of chemical fiber/other fiber.
5 Requirements
5.1 Required contents
3 Sole length of open-toe pressure socks is beyond the scope of the assessment.
Table 5 Specification, Dimension and Tolerance for Over-knee Middle-leg Pressure Socks
Woven of Cotton (Wool and Chemical Fiber Blended Yarn)/Core-spun Spandex Yarn In mm
Size Sole length
Tolerance of
sole length
Total length
Top height
Top
width
Tolerance for
top width
22-24 19
±1 57 3 13.5 ±1
24-26 21
26-28 23
28-30 25
Notes.
1 The total length prevails when the middle and high parts of the top are aligned to the corresponding pressure test
point and the pressure socks are covered on the model leg.
2 If customers put forward additional requirements for the specification and dimension, customer requirements shall
prevail.
3 Sole length of open-toe pressure socks is beyond the scope of the assessment.
Table 6 Specification, Dimension and Tolerance for Long Pressure Socks Woven of Cotton
(Wool and Chemical Fiber Blended Yarn)/Core-spun Spandex Yarn In mm
Size Sole length Tolerance of sole length Total length≥ Top height≥
Top
width
Tolerance for
top width
22-24 19
±1 72 3 14.5 ±1
21-26 21
26-28 23
28-30 25
Notes.
1 The total length prevails when the middle and high parts of the top are aligned to the corresponding pressure test
point and the pressure socks are covered on the model leg.
2 If customers put forward additional requirements for the specification and dimension, customer requirements shall
prevail.
3 Sole length of open-toe pressure socks is beyond the scope of the assessment.
5.3.2 Grading requirements for specification and dimension
They are detailed in Table 7.
Table 7 Grading Requirements for Specification and Dimension In mm
Item First-grade product Conforming product
Sole
length Size 22-30
In accordance with
standard and tolerance
in Table 1~Table 6.
-1.5 above the
standard tolerance of
first-grade product
Total
length
Below-knee middle-leg pressure socks woven of
elastic nylon yarn (polyester yarn)/core-spun
spandex yarn
-1.5 over the standard
tolerance of
first-grade product
Over-knee middle-leg pressure socks and long -3 over the standard
They are detailed in Table 11.
Table 11 Grading Requirements for Inherent Quality
Item First-grade product Conforming product
Pressure
In accordance with the requirements
of this standard. 2mmHg difference
is allowable for a couple of pressure
socks in the same pair.
-1 mmHg over the standard of first-grade
product is allowable. 1mmHg difference over
the standard of first-grade product is allowable
for a couple of pressure socks in the same pair.
Colour fastness
In accordance with the requirements of this standard
Formaldehyde content
pH value
Peculiar smell
Decomposable aromatic
amine dyes
Fi...