FZ/T 73023-2006 English PDF (FZT73023-2006)

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FZ/T 73023-2006: Antibacterial knitwear
FZ/T 73023-2006
TEXTILE INDUSTRY STANDARD
OF THE PEOPLE?€?S REPUBLIC OF CHINA
ICS 59.080.30
W 63
Antibacterial knitwear
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ISSUED ON: MARCH 07, 2006
IMPLEMENTED ON: AUGUST 01, 2006
Issued by: National Development and Reform Commission of PRC
Table of Contents
Foreword ... 3??
1 Scope ... 4??
2 Normative references ... 4??
3 Terms and definitions... 4??
4 Product categories and variety specifications ... 5??
5 Requirements ... 5??
6 Test methods ... 7??
7 Inspection rules ... 8??
8 Packaging and marking ... 8??
Appendix A (Normative) Standard blank sample ... 10??
Appendix B (Normative) Standard detergent ... 11??
Appendix C (Normative) Washing test method of antibacterial fabric sample ... 12??
Appendix D (Normative) Test methods of antimicrobial fabrics ... 14??
Appendix E (Normative) Dissolution test method for antibacterial substances - Halo
method ... 28??
Antibacterial knitwear
1 Scope
This standard specifies the requirements, test methods, inspection rules, packaging and
marking of antibacterial knitwear.
This standard applies to antibacterial knitwear, which is made of natural fibers,
chemical fibers, blended fibers.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For the dated references, the subsequent amendments
(excluding corrections) or revisions do not apply to this Standard; however, parties who
reach an agreement based on this Standard are encouraged to study if the latest versions
of these documents are applicable. For undated references, the latest edition of the
referenced document applies.
GB/T 4856 Package of cotton goods and knitwear
GB 5296.4 Instructions for use of products of consumer interest - Part 4: Textiles
and apparel
GB 7919 Procedures and methods of safety evaluation for cosmetics
GB/T 8629-2001 Textiles - Domestic washing and drying procedures for textile
testing
GB 18401-2003 National general safety technical code for textile products
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Antibacterial fiber
Chemical fiber, which has antibacterial substance and antibacterial function.
3.2
Antibacterial finish
The dyeing and finishing process of treating textiles, by the use of antibacterial
substances, to make them have antibacterial functions.
3.3
Antibacterial finishing agent
Antibacterial substances, which are used as antibacterial finishing of textiles.
According to its dissolution characteristics on fabric fibers, it can be divided into
two categories: Dissolution type antibacterial finishing agents and non-dissolution
type antibacterial finishing agents.
3.4
Antibacterial knitwear
Knitwear, which is subject to antibacterial finishing OR contains antibacterial fibers,
that can inhibit the growth, reproduction of bacteria and fungi on the fabric OR
inactivate them.
4 Product categories and variety specifications
4.1 According to fiber raw materials, products can be divided into knitwear of natural
fiber, chemical fiber, blended fiber.
4.2 According to the product structure, the products can be divided into knitted products
partially inlaid or patched with antibacterial fabrics AND knitted products composed of
antibacterial fabrics as a whole.
4.3 According to the use of the products, the products can be divided into knitted
underwear, underwear, sportswear, T-shirts, socks, hats, bras, abdominal belts,
swimwear, other knitted products and various knitted fabrics.
4.4 The varieties and specifications of various products shall be implemented, in
accordance with the current national standards or industry standards, for the
corresponding knitwear.
5 Requirements
The requirements of antibacterial knitwear are divided into four aspects: intrinsic
quality, appearance quality, antibacterial effect, safety.
5.3 Safety
5.3.1 The antibacterial substances, which are used in antibacterial knitwear, must be
approved by relevant departments AND have a test report from a qualified organization
(chemical content test method of antibacterial substances, acute oral toxicity, skin
irritation, eye irritation, mutagenicity, the test report corresponding to the products).
The instructions for use, which is provided by the manufacturer of antibacterial
substances, according to the function promotion of the manufacturer, shall show the test
report of the test content corresponding to its function promotion.
5.3.2 The skin irritation and allergy, which are caused by the leaching of antibacterial
substances, which are used in antibacterial knitwear, shall be negative in the body patch
test, according to GB 7919.
5.3.3 Antibacterial knitwear shall meet the requirements of GB 18401-2003.
5.3.4 Dissolution index of antibacterial substances, which are used to antibacterial
knitwear: After the antibacterial fabric is washed once, the width of the antibacterial
ring D ??? 5 mm.
6 Test methods
6.1 Inspection of intrinsic quality and appearance quality
The test methods for the intrinsic quality and appearance quality of various antibacterial
knitwear shall be implemented, in accordance with the current national standards or
industry standards, for the corresponding knitwear.
6.2 Inspection of antibacterial effects
6.2.1 Test according to the Quinn method, absorption method or oscillation method, in
Appendix D of this standard.
6.2.2 The arbitration inspection method for grade A products shall be implemented,
according to the absorption method in Appendix D of this standard.
6.2.3 The arbitration inspection method of grade AA products and grade AAA products
shall be implemented, according to the oscillation method in Appendix D of this
standard.
6.3 Dissolution test of antibacterial substances used in antibacterial knitwear
It is performed, according to the halo method, as shown in Appendix E of this standard.
7 Inspection rules
7.1 For the sampling quantity and rules of various types of antibacterial knitwear, in
addition to following the current national or industrial standards for the corresponding
knitwear, during the sampling, it shall randomly take about 200 g of antibacterial fabric
samples, for the antibacterial effect testing and the testing of dissolution of antibacterial
substances.
7.2 The intrinsic quality and appearance quality of all kinds of antibacterial knitwear
shall be evaluated, according to the current national standards or industry standards, for
the corresponding knitwear.
7.3 All kinds of antibacterial knitwear shall be evaluated whether they meet the
requirements, according to the provisions in GB 18401-2003.
7.4 The relevant testing report, which is issued by the qualified organization of the state,
is based to evaluate the antibacterial substances, which are used in antibacterial
knitwear.
7.5 The testing report of the body patch test, which is issued by the qualified
organization of the state, is based, to evaluate the skin irritation and allergenicity of the
leaching substance of the antibacterial substances, which are used in the antibacterial
knitwear.
7.6 For randomly selected antibacterial fabric samples, evaluate the antibacterial effect,
according to the bacteriostatic rate index, which is specified in Table 1 of this standard.
7.7 For randomly selected antibacterial fabric samples, evaluate the dissolution of
antibacterial substances, according to the index, which is specified in 5.3.4 of this
standard.
7.8 If all the indicators of the evaluated product meet the requirements of 7.2, 7.3, 7.4,
7.5, 7.6, 7.7, the product will be judged as a qualified product. If any one of them fails
to meet the requirements, the product will be judged as a non-qualified product.
7.9 If there are any matters not covered in this inspection rule, the jurisdiction
department of the industry may issue additional detailed rules.
8 Packaging and marking
8.1 All kinds of antibacterial knitwear packaging shall be implemented, in accordance
with GB/T 4856.
8.2 All kinds of antibacterial knitwear markings shall be implemented, in accordance
with GB 5296.4.
exceed one month.
D.3.3 Sabouraud agar medium: Accurately weigh 40 g of glucose, 10 g of peptone, 20
g of agar powder. Add 1000 mL of distilled water. Put them in a flask to mix it. Heat
the flask in a boiling water bath, to fully dissolve it. Then use 0.1 mol/L sodium
hydroxide solution, to adjust the pH to 5.6 ?? 0.2. Cover a cotton plug. Sterilize it at 103
kPa and 121 ??C, for 15 min. When using it, adjust the temperature of the medium to
45 ??C ~ 46 ??C. If not used immediately, store it at 5 ??C ~ 10 ??C. The shelf life cannot
exceed one month.
D.3.4 Slant medium: Pour about 10 mL of nutrient agar medium (or Sabouraud agar
medium) into a test tube. Cover a cotton plug. Sterilize it at 103 kPa and 121 ??C, for 15
minutes. After sterilization, place it in a sterile chamber, at an angle of about 15?? from
the horizontal plane, to allow it to solidify. When not in immediate use, store it at 5 ??C
~ 10 ??C. When there is no condensed water, it can be heated and melted to solidify again
before use. The shelf life cannot exceed one month.
D.3.5 The 0.03 mol/L PBS (phosphate) buffer solution: Take 2.84 g of disodium
hydrogen phosphate, 1.36 g of potassium dihydrogen phosphate, 1000 mL of distilled
water, to prepare a buffer solution of pH 7.2 ~ 7.4. After dividing in 250 mL flasks,
sterilize it at 103 kPa and 121 ??C, for 15 min. Prepare for use. If not used immediately,
store it at 5 ??C ~ 10 ??C. The shelf life cannot exceed one month.
D.3.6 Physiological saline for dilution: Accurately weigh 8.5 g of sodium chloride. Add
1000 mL of distilled water. Put it into a flask, to dissolve it fully. If necessary, take a
part of it and put it into a test tube. Sterilize it at 103 kPa and 121 ??C, for 15 min. Prepare
for use. If not used immediately, store it at 5 ??C ~ 10 ??C. The shelf life cannot exceed
one month.
D.3.7 Physiological saline for eluting specimen live bacteria: Accurately weigh 8.5 g
of sodium chloride. Add 1000 mL of distilled water. Put it into a flask, to fully dissolve
it. Add 2 g of nonionic surfactant Tween-80. If necessary, take a part of it. Put it into a
test tube or triangular flask. Sterilize it at 103 kPa and 121 ??C, for 15 min. Prepare for
use. If not used immediately, store it at 5 ??C ~ 10 ??C. The shelf life cannot exceed one
month.
D.4 Test strains and strain preservation
D.4.1 Test standard strains: Staphylococcus aureus (ATCC 6538), Escherichia coli
(8099), Candida albicans (ATCC 10231).
D.4.2 Substitution of standard strains: Escherichia coli (ATCC 29522) or pneumoniae
(ATCC 4352) can be used instead of Escherichia coli (8099).
D.4.3 Strain transfer and preservation: The stored strains shall be transferred once a
month. The number of transfers shall not exceed 10 generations. The transfer can be
Appendix A. The specimen size is 2.5 cm x 2.5 cm. Each specimen is wrapped with a
small piece of paper; sterilized at 103 kPa and 121 ??C, for 15 min; prepared for later
use.
D.6.2.2 Preparation of inoculated bacterial solution: Use 0.03 mol/L PBS solution, to
dilute the bacterial suspension, which is prepared in D.5.1 (or the fungal suspension in
D.5.2). Control the number of viable bacteria to be 5 x 104 cfu/ mL ~ 1 x 105 cfu/mL
(reference value. Take the upper limit for Staphylococcus aureus; take the lower limit
for Escherichia coli and Candida albicans. If there are too many viable bacteria, it is
difficult to count after culturing; if there are too little viable bacteria, it has larger
counting error, after culture). For specimens, which have poor water absorption, it may
add 0.05% nonionic surfactant Tween-80, to the bacterial liquid, to facilitate the
bacterial liquid absorption. If a surfactant is added, it shall be indicated in the test report.
D.6.2.3 Preparation of semi-solid medium: Dissolve 1 part of nutrient agar medium (or
Sabouraud agar medium), in 3 parts of distilled water, to make semi-solid medium.
Divide it into flasks. Seal the cap. Sterilize it at 103 kPa and 121 ??C, for 15 min. Prepare
for later use. It may add 1/100000 of triphenyltetrazolium chloride (TTC) dye, to the
semi-solid medium, which is prepared by nutrient agar medium, to make the bacterial
colonies be red, which is very easy to observe. Note that the dye shall be added, when
the semi-solid medium is cooled to about 60 ??C. It shall be prepared before use. The
dyeing agent will be degraded and unstable, if the temperature is too high or the
placement time is too long. It is not necessary to add TTC dyeing agent, to the semi-
solid medium, which is prepared by Sabouraud agar, because it cannot stain fungi, such
as Candida albicans.
D.6.3 Test operation
D.6.3.1 Inoculation: Put antibacterial fabric specimens, non-antibacterial treated fabric
specimens, standard blank specimens, in the sterilized empty plates, respectively.
Pipette 0.1 mL of the prepared bacterial solution. Smear it evenly on each specimen, at
least 5 points. Make the bacterial liquid be absorbed in the cloth, as far as possible.
D.6.3.2 Drying: Place it in a biochemical incubator, at about 37 ??C under the condition
of no bacterial contamination. Place it to dry for 1 h ~ 3 h. Note that the inoculated
bacterial solution on the specimen shall be completely dried, before proceeding to the
next step of attaching the medium. Otherwise, the strains may overflow and grow
outside the specimen, resulting in counting errors.
D.6.3.3 Attaching the specimen: Pour about 15 mL of nutrient agar medium (or
Sabouraud agar medium) into the plate. Cool it. Then, place the dried specimen flat on
the medium. Use sterile tweezers, to gently press the specimen, to make it close to the
surface of the medium. One standard blank specimen, one antibacterial fabric specimen,
one non-antibacterial fabric specimen can be attached to each plate. Two parallel
specimens of plates are made for each test.
number of washings. The fabric specimen withou...