GB/T 33229-2016 English PDF (GBT33229-2016)
GB/T 33229-2016 English PDF (GBT33229-2016)
GB/T 33229-2016: Coated aluminum and aluminum alloy strips for electrical components
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Coated aluminum and aluminum alloy strips
for electrical components
ISSUED ON: DECEMBER 13, 2016
IMPLEMENTED ON: NOVEMBER 01, 2017
Issued by: General Administration of Quality Supervision, Inspection and Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Requirements ... 6
5 Test methods ... 9
6 Inspection rules ... 12
7 Marking, packaging, transportation, storage, quality certificate ... 15 8 Order (or contract) content ... 16
Coated aluminum and aluminum alloy strips
for electrical components
This standard specifies the terms and definitions, requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate, order form (or contract) of coated aluminum and aluminum alloy strips for electrical components.
This standard applies to aluminum and aluminum alloy polyurethane roller painted strips (hereinafter referred to as coated strip) which are used for packaging the enclosures of such electrical components as solid capacitors, liquid capacitors, chip capacitors, film capacitors, electrolytic capacitors, lithium batteries.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.
GB/T 3190 Wrought aluminum and aluminum alloy - Chemical composition
GB/T 3199 Wrought aluminum and aluminum alloy products - Packing,
marking, transporting and storing
GB/T 3880.3 Wrought aluminum and aluminum alloy plates, sheets and
strips for general engineering - Part 3: Tolerances on forms and dimensions GB/T 5125 Method for deep drawing cups testing of non-ferrous metals
GB/T 6739 Paints and varnishes - Determination of film hardness by pencil test
GB/T 6742 Paints and varnishes - Bend test (cylindrical mandrel)
GB/T 7999 Optical emission spectrometric analysis method of aluminum and aluminum alloys
GB/T 8005.3 Aluminum and aluminum alloys - Terms and definitions - Part 3: Surface treatment
GB/T 8013.3 Anodic oxide coatings and organic polymer coatings on
aluminum and its alloys - Part 3: Organic polymer coatings
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 9286 Paints and varnishes - Cross cut test for films
GB/T 9753 Paints and varnishes - Cupping test
GB/T 16865 Test pieces and method for tensile test for wrought aluminum and magnesium alloys products
GB/T 17432 Methods for sampling for analyzing the chemical composition
of wrought aluminum and aluminum alloys
GB/T 20975 (all parts) Methods for chemical analysis of aluminum and
GB/T 22638.4-2016 Test methods for aluminum and aluminum alloy foils -
Part 4: Determination of surface wetting tension
GB/T 23989-2009 Determination for the solvent resistance of coatings by solvent rubs
GB/T 26296 Defects for anodic oxide coatings and organic polymer coatings on aluminum and its alloys
GB/T 26492.3 Defects for wrought aluminum and aluminum alloys ingots
and products - Part 3: Defects for plates, sheets and strips
3 Terms and definitions
The terms and definitions as defined in GB/T 26296, GB/T 26492.3, GB/T
8005.3 as well as the following terms and definitions apply to this document. 3.1
The viscosity of the polymer when it reaches a certain temperature.
Resistance to acid and
alkaline It is free of black spots, white spots, blistering, peeling off Heat resistance In visual observation, the film is free of yellowing or discoloration Surface wetting tension When using No.34 Dyne, the scratch does no shrink Insulation At AC 800V, there is no breakdown (withstand voltage tester does not alarm) Thermo viscidity In visual observation, the film is free of adhesion marks Resistance to cup-drawing The film shall, after being subjected to the cup-drawing test at a compression depth of 5 mm, be free of cracking or peeling off Bending resistance In visual observation, the film is free of cracking or peeling off 4.7 Appearance quality
4.7.1 It is not allowed for the substrate surface to have surface bubbles, water marks, impression marks, bumps, holes, non-metallic indentations, metal indentations, dents, creases, crimps, knife marks, scratches, roller marks, scratches, rolling damage, oil spots, corrosion, pine-shaped patterns, ribs, yellow spots, black strips, roller flowers, embossing, light and dark stripes, sticky marks.
4.7.2 The surface of the substrate is allowed to have defects such as
inconspicuous vibration lines that do not affect the use.
4.7.3 It is not allowed for the surface of the coated strip to have bubble spots, fracturing, yellowing, orange peel, fat edge, shrinkage hole, bottom exposure, color difference, black strip, miscellaneous point (particle), mixed color, flowing mark, knife mark, scratch.
4.7.4 The coated strip shall be wound up and rolled tightly and neatly. It is not allowed for the end surface to be scratched or damaged. It is not allowed for the side part to be cracked, curled, or have filamentous burrs.
4.7.5 It is not allowed for the coated strip to have collapse or bird's nest. 4.7.6 It is not allowed for the coated strip to have joints.
5 Test methods
5.1 Chemical composition
5.1.1 The analytical method for the chemical composition of the substrate shall comply with the provisions of GB/T 20975 or GB/T 7999. The arbitration
analysis shall adopt the method as specified in GB/T 20975.
5.1.2 The calculation of “Al” content shall be in accordance with the provisions of GB/T 3190. When calculating the “Al” content, take the sum of the analytical Follow the determination method of local film thickness as specified in GB/T 8013.3 to make determination.
5.5.2 Pencil hardness
The pencil hardness testing of the film layer is carried out in accordance with the provisions of GB/T 6739. Observe whether the surface film is scratched. 5.5.3 Dry adhesion
184.108.40.206 According to the provisions of GB/T 9286, first draw 11 parallel lines on the specimen. Then draw 11 lines perpendicular to these parallel lines. The spacing between parallel lines is 1 mm.
220.127.116.11 Cover the adhesive tape1) which has an adhesive force of more than 10 N/25 mm on the cross-cut film layer. Rush off the air under the adhesive tape. Quickly pull off the adhesive tape vertically. Grade it according to GB/T 9286. 5.5.4 Resistance to boiling water
Inject the clean water into the beaker (it should use tap water). The height of the water is about 100 mm. The water is heated to the temperature of 95 °C ± 3.0 °C. Completely immerse the 80 mm long specimen in water. After placing it for 20 min, remove it. Wipe the specimen dry. After cooling it to room
temperature, use visual observation to check the surface of film (except for the peripheral portion of the specimen).
5.5.5 Solvent resistance
The test of solvent resistance of the film layer is carried out according to the provisions of 7.1 or 7.2 of GB/T 23989-2009. The arbitration method is carried out according to the provisions of 7.2 of GB/T 23989-2009.
5.5.6 Resistance to acid and alkaline
Prepare a sodium hydroxide solution which has a pH of 10.5 ~ 11.0 and a hydrochloric acid solution which has a pH of 3.0 ~ 3.5. Heat the sodium hydroxide solution to 45 °C ~ 60 °C. Put the specimen into it to soak it for 20 min. Remove it. Use flowing clean water (it should use tap water) to rinse the sodium hydroxide solution. Heat the hydrochloric acid solution to 20 °C ~ 30 °C. Then put the specimen in. Immerse it for 20 min. Use flowing clean water to rinse the hydrochloric acid solution clean. Visually check the surface of film. 5.5.7 Heat resistance
1 The Scotch 610 adhesive tape or Permacel 99 adhesive tape is an example of a suitable commercial product. This information is given for the convenience of users of this standard and does not imply endorsement of this product. form (or contract). Meanwhile the quality certificate shall be filled.
6.1.2 The purchaser shall inspect the received coated strip in accordance with the provisions of this standard. If the inspection result is inconsistent with the provisions of this standard and the order form (or contract), it shall be submitted to the supplier in written form and shall be settled by negotiation between the supplier and the purchaser. Objections to appearance quality and dimensional deviation shall be proposed within one month from the date of receipt of the coated strip. Objections to other properties shall be proposed 3 months from the date of receipt of the coated strip. If arbitration is required, it may be entrusted to the organization as recognized by both the supplier and the purchaser; and sampled together with the purchaser.
Coated strips shall be submitted for acceptance in batches. Each batch shall consist of coated strips of the same designation, the same state, the same size specification, the same surface treatment process.
The coated strip shall be weighed by measurement.
6.4 Inspection items
Each batch of coated strips shall, before exit-factory, be tested for chemical composition, dimensional deviation, tensile mechanical properties at room temperature, deep-drawing, film properties, appearance quality before exit- factory.
Sampling of coated strips shall be in accordance with the provisions of Table 8. Table 8 -- Provisions on sampling of coated strip
Inspection items Sampling requirements Clause number of requirements
Clause number of
Chemical composition It is carried out according to the provisions of GB/T 17432 4.2 5.1 Dimensional deviation It is inspected roll by roll 4.3 5.2
performance at room
Not less than 1 roll per batch. Cut 3 specimens per roll.
The specimen shall comply with the provisions of
Randomly take 2 rolls of coated strip per batch. Take
1 specimen from each roll of coated strip for inspection 4.5 5.4
by roll. The qualified can be supplied.
6.6.6 If the appearance quality of any of the rolls is unqualified, the coated strip is judged to be unqualified.
7 Marking, packaging, transportation, storage, quality
7.1.1 Product marking
The coated strip which passes the inspection shall be attached by the labels which indicate the following contents (when the width of the coated strip is less than 25.0 mm, it is attached to the outside of the package):
a) Product name;
b) Designation, state;
c) Size specifications;
d) Film thickness;
e) Batch number or roll number of coated strip;
f) Net weight;
g) Inspection seal of the supplier’s quality inspection department (or the signature or seal of the quality inspection personnel).
7.1.2 Marking of packaging box
The packaging box’s marking of the coated strip shall comply with the
provisions of GB/T 3199.
7.2 Packaging, transportation, storage
The packaging, transportation, storage of coated strips shall comply with the provisions of GB/T 3199. When the purchaser has special requirements on the packaging method of the coated strip, it shall be determined by both the supplier and the purchaser through negotiation and indicated in the order form (or contract).
7.3 Quality certificate
Each batch of coated strip shall be accompanied by a product quality certificate,