QB/T 2421-1998 English PDF (QBT2421-1998)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click QB/T 2421-1998
Historical versions: QB/T 2421-1998
Preview True-PDF (Reload/Scroll if blank)

QB/T 2421-1998: Aluminum and aluminum alloy non-stick cookware
QB/T 2421-98
QB
LIGHT INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Classification code. Y 68
File No.. 2310-1999
Aluminum and aluminum alloy non-stick cookware
ISSUED ON. DECEMBER 28, 1998
IMPLEMENTED ON. JULY 01, 1999
Issued by. State Light Industry Bureau
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Definitions ... 5 
4 Product classification ... 6 
5 Technical requirements ... 7 
6 Test methods ... 12 
7 Inspection regulation ... 18 
8 Marking, label and instructions for use ... 21 
9 Package, transportation and storage ... 22 
Annex A ... 24 
Annex B ... 25 
Annex C ... 28 
Annex D ... 29 
Foreword
This standard non-equivalently adopts British standard BS 7069-1988 "Specification for
cookware".
Annexes A, B, C and D are all informative.
This standard was proposed by Industry Management Department of State Light Industry
Bureau.
This standard shall be under the jurisdiction of National Daily Hardware Standardization
Center.
The main drafting organizations of this standard. Shanghai 1st Aluminum Product Factory,
Shenyang Light Industry Research and Design Institute, Shanghai Xingli Hardware
Products Co., Ltd., Zhejiang Taizhou ASD Electric Appliances Co., Ltd., Shaoxing
Huachang General Factory of Aluminum Products, Non-stick Cookware Branch of Fenglei
Brmory Aviation Industry Corporation of Guizhou China, Guangdong Nanhai Hefeng
Electrochemical Co., Ltd., Southern General Hardware Factory of Guangdong, Dupont
China Holding Co., Ltd. AND Daikin Fluoro Coatings (Shanghai) Co., Ltd.
The main drafters of this standard. Ge Qingzhang, Li Yang, Han Yuliang, Chen Helin, Shou
Xincheng, Zhou Qingyu, Kong Lingrui and Xiao Huiqxin.
This standard shall be interpreted by National Daily Hardware Standardization Center.
Aluminum and aluminum alloy non-stick cookware
1 Scope
This standard specifies the definition, product classification, technical requirements, test
methods, inspection rules, mark, packaging, transportation and storage requirements of
aluminum and aluminum alloy non-stick pan products.
This standard is applicable to household aluminum and aluminum alloy non-stick pan
products which is made by using aluminum and aluminum alloy as base-body, painting its
inner surface with non-stick coating and polishing its outer surface or painting its outer
surface with heat resistance paint or other surface treatment such as aluminium enameling.
2 Normative references
The following normative documents contain the provisions, which through reference in this
text, constitute the provisions of this standard. At the time of publication, the editions
indicated were valid. All standards are subject to revision, and parties who enter into
agreements based on this standard are encouraged to investigate the possibility of
applying the most recent editions of the standards indicated below.
GB 191-90 Packaging - Pictorial markings for handling of goods
GB/T 2828-87 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply
to inspection of successive lots or batches)
GB/T 2829-87 Sampling procedures and tables for periodic inspection by attributes (Apply
to inspection of stability for productive process)
GB/T 6060.4-88 Roughness comparison specimens - Polished surfaces
GB/T 6388-86 Transport package shipping mark
GBAT 6543-86 Corrugated box
GB/T 6544-86 Corrugated fiberboard
GB/T 6739-1996 Determination of film hardness by pencil test
GB 11678-89 Hygienic standard for polytetrafluorethylene used as inner coating of food
containers
GB/T 11679-89 Method for analysis of hygienic standard of polytetrafluorethylene coating
Assessment of coating surface by microscope.
3.10 Crack
The non-stick coating crack which is observed with microscope.
4 Product classification
4.1 Product category
4.1.1 The products can be classified, according to usage, into boiling pan, frying pan, wok,
milk pan and accessories.
4.1.2 The inner product surface is painted with non-stick coating. Non-stick coating is
classified into one-layer, double-layer and three-layer system and so on.
4.1.3 The outer surface is treated with painting non-stick coating, aluminium enameling,
high temperature resistance paint or polishing and other kinds of treatment methods.
4.2 Product specification
4.2.1 The product specification can be expressed in inner diameter or volume.
4.2.2 When the specification is expressed in inner diameter, the unit shall be centimetre
(cm), and even number series has the priority to be used.
4.2.3 When the specification is expressed in volume, the unit shall be litre (L). The value is
taken to keep a decimal places.
4.3 Product diagram
The typical product structure and components name is shown as Figure 1.
Peeling strength is tested according to clause 6.4. The striped coating shall not be greater
than 6mm away from the edge of knife scratch.
5.3.6 Scratch resistance
Scratch resistance is tested according to clause 6.5. The total length of coating which is
not removed shall not be less than 10%.
5.3.7 Non-stick performance
Non-stick performance is tested according to clause 6.6. The tested food can be taken out
with non-metal scoop from the coating surface without any damage and the coating surface
can be cleaned with soft cloth.
5.3.8 Stability after heated and shock cooling
It shall be tested according to clause 6.7 and there shall not be bubble or cracks on coating
surface.
5.3.9 Alkali resistance
It shall be tested according to clause 6.8 and there shall not be peeling or cracks on coating
surface.
5.3.10 Acid resistance
It shall be tested according to clause 6.9 and there shall not be peeling, cracks. or
shrinkage on coating surface.
5.3.11 Saline water corrosion resistance
It shall be tested according to clause 6.10 and there shall not be additive defects on coating
surface such as bubble, corrosion spot and so on.
5.3.12 Microscopic appearance
It shall be tested according to clause 6.24. There shall not be bottom exposure and cracks
on the coating when observed with 10x microscope.
5.3.13 Hygienic requirements
The hygienic requirements of non-stick coating shall fulfill requirements of GB 11678.
5.4 High temperature resistant paint film
5.4.1 Appearance
The paint film surface shall be smooth and have uniform color and there is no blister or
peeling. A small amount of micro particles and pores are permitted.
The coating shall be completely hot melted. Its surface shall be basically smooth and have
uniform color while there is no obvious bubbles, cracks, bottom exposure and peelings.
5.6.2 Thickness
It shall be tested according to clause 6.12 and the average coating thickness shall not be
less than 10μm.
5.6.3 Adhesion strength
It shall be tested according to clause 6.13. There shall not be whole coating stripe peeling
within the gridded area.
5.6.4 Hardness
It shall be tested according to clause 6.14 and pass 2H pencil test.
5.6.5 Stability after heated and shock cooling.
It shall be tested according to clause 6.15 and the coating shall have no bubbles and cracks.
5.6.6 When the non-stick coating is used as outer coating, it shall not be in direct contact
with open fire.
5.7 Polished surface
The polished surface shall be shine and have uniform color. It shall be tested according to
clause 6.16 and the polishing roughness Ra shall not be less than 0.4μm.