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QB/T 2421-1998Aluminum and aluminum alloy non-stick cookware (English PDF)

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Issued by

State Light Industry Bureau

Level / Type

National · Recommended

Issue date

December 28, 1998

Implementation date

July 1, 1999

Scope

QB/T 2421-1998 (Aluminum and aluminum alloy non-stick cookware) is available as an English-translated PDF.

QB/T 2421-1998 — 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.

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Document preview — QB/T 2421-1998

National Standard of the People's Republic of China

Issued by: State Light Industry Bureau

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.

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.

5.8 Riveting

The coating on rivet surface shall have no peeling and the rivet shall be regular and fit

perfectly.

5.9 Water leakage of pan body

It shall be tested according to clause 6.21 and there shall have no water leakage on riveting

parts.

5.10 Appearance

The exposed parts of products and components shall be smooth and have no rags, cracks

and sharp edges.

5.11 Decorative figure

The decorative figure on outer surface of products shall be clean as well as basically

complete.

6.5.2 Hold the pneumatic pen with hand and press it downward to make its second guide

roller contact with the coating surface. Move the pneumatic pen evenly at the condition of

keeping it vertical to carve a 40mm~50mm long scratch

6.5.3 Observe the scratch visually and the total length of coating which is not removed

shall not be less than 10%.

6.5.4 Check that whether the ball-point pen can rotate flexibly before each scratch test is

carried out. Checking method. continuous line can be made with the ball-point. Otherwise,

the ball-point pen shall be replaced with a new one.

6.6 Non-stick performance test of non-stick coating

6.6.1 Wipe the non-stick coating sur...

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 29 pages — is available in the English PDF.

Referenced standards

Normative references

GB 191 · GB/T 2828 · GB/T 6060.4 · GB/T 6388 · GB 11678 · GB/T 11679

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