GB/T 29345-2012 Packaging Containers Aluminum Easy-Open Steel Two-Piece Cans GB/T29345-2012 |tt||Standard compression package decompression password: www.bzxz.net
This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of aluminum easy-open steel two-piece cans. This standard applies to the manufacture, use, circulation and supervision inspection of unused aluminum easy-open steel two-piece cans for beer, carbonated and nitrogen-filled soft drinks.
This standard was drafted in accordance with the rules given in GB/T1.1-2009 "Guidelines for Standardization Work Part 1: Structure and Preparation of Standards".
This standard was proposed and managed by the National Technical Committee for Packaging Standardization (SAC/TC49).
The main drafting units of this standard: National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Shanghai Baosteel Packaging Co., Ltd., Guangzhou Quality Supervision and Inspection Institute, Shanghai Baoyi Can Co., Ltd., Hebei Baosteel Can North Co., Ltd., Chengdu Baosteel Can Co., Ltd., Foshan Baosteel Can Co., Ltd., Shanghai Baosteel Cover Co., Ltd., Wuhan Baosteel Can Co., Ltd.
The main drafters of this standard: Cao Qing, Luo Xiaoyin, Zhuang Jianjun, Zhang Qing, Zhu Liping, Pan Qingfang, Luo Jing, Gao Hongliang, Lu Ming.
The following documents are indispensable for the application of this document. For all dated references, only the dated version applies to this document. For all undated references, the latest version (including all amendments) applies to this document.
GB/T2828.1—2003 Sampling procedures for inspection by attributes Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL)
GB/T4122.1 Packaging terminology Part 1: Fundamentals
GB4806.1 Hygienic standard for rubber products for food use
GB5009.60 Method of analysis for the hygienic standard of polyethylene, polystyrene and polypropylene molded products for food packaging
GB5009.64 Method of analysis for the hygienic standard of rubber gaskets (rings) for food packaging
GB5009.69 Method of analysis for the hygienic standard of epoxy phenolic coatings for the inner wall of food cans
GB11677 Hygienic standard for water-based modified epoxy coatings for the inner wall of cans
GB/T18455 Packaging recycling mark

ICS55.100
National Standard of the People's Republic of China
GB/T29345—2012
Packaging containers
Aluminum easy open end and two-piece steel can
Packaging containers--Aluminum easy open end and two-piece steel can2012-12-31 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of China
2013-09-01Implementation
GB/T29345—2012
This standard was drafted in accordance with the rules given in GB/T1.1-2009 "Guidelines for Standardization Work Part 1: Structure and Preparation of Standards". This standard was proposed and managed by the National Technical Committee for Packaging Standardization (SAC/TC49). The main drafting units of this standard are: National Packaging Product Quality Supervision and Inspection Center (Guangzhou), Shanghai Baosteel Packaging Co., Ltd., Guangzhou Quality Supervision and Inspection Institute, Shanghai Baoyi Can Co., Ltd., Hebei Baosteel Can North Co., Ltd., Chengdu Baosteel Can Co., Ltd., Foshan Baosteel Can Co., Ltd., Shanghai Baosteel Cover Co., Ltd., Wuhan Baosteel Can Co., Ltd. The main drafters of this standard are: Cao Qing, Luo Xiaoyin, Zhuang Jianjun, Zhang Qing, Zhu Liping, Pan Qingfang, Luo Jing, Gao Hongliang, Lu Ming. 1 Scope
Packaging containers
Aluminum easy-open steel two-piece cans
GB/T29345—2012
This standard specifies the classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of aluminum easy-open steel two-piece cans.
This standard applies to the manufacture, use, circulation and supervision and inspection of unused aluminum easy-open steel two-piece cans for beer, carbonated and nitrogen-filled soft drinks.
2 Normative references
The following documents are indispensable for the application of this document. For any dated reference, only the dated version applies to this document. For any undated reference, the latest version (including all amendments) applies to this document. GB/T2828.1--2003 Sampling procedures for inspection by attributes Part 1: Sampling plan for batch inspection based on acceptance quality limit (AQL)
GB/T4122.11
Packaging terms Part 1: Basics
GB4806.1 Hygienic standard for rubber products for food GB5009.60 Analytical methods for hygienic standards for polyethylene, polystyrene and polypropylene molded products for food packaging GB5009.64||t t||Analysis method for hygienic standard of rubber gasket (ring) for food packaging GB5009.69Analysis method for hygienic standard of epoxy phenolic coating for inner wall of food can GB11677Hygienic standard of water-based modified epoxy coating for inner wall of can 5Packaging recycling mark
GB/T18455
3Terms, definitions and symbolswww.bzxz.net
3.1Terms and definitions
The terms and definitions defined in GB/T4122.1 apply to this document. 3.2Symbols
The following symbols apply to this document.
Neck-down flanged can body
Flange width;
Outer diameter of can body;
Inner diameter of neck-down;
Height of can body.
Aluminum easy-open lid
Hook opening;
Number of overlapping hooks per 50.80mm;
GB/T29345—2012
One hook outer diameter;
Counterburst degree;
Hook height.
Classification of aluminum easy-open lid steel two-piece cans
Steel two-piece cans
Steel two-piece cans are divided into 206/211×310 (250mL), 206/211×314 (275mL), 206/211×408 (330mL), 206/211×413 (355mL), 206/211×610 (500mL) according to the model. Note: Special models are determined by both the supply and demand parties. Example of steel two-piece can model:
206/211X310
Can height code
Can body nominal diameter code
Aluminum easy-open cover, can mouth code
4.2 Aluminum easy-open cover
4.2.1 Aluminum easy-open cover is divided into pull ring type and retaining plate type easy-open cover, see Figure 1. a) Pull ring type
Sketch of easy-open cover
4.2.2 Steel two-piece cans use high shoulder injection cover, injection position see Figure 2. Thunder seal
Sketch of injection position
Retaining plate
4.3 Structural dimensions
4.3.1 The main dimensions and limit deviations of the necked and flanged can body The main dimensions and limit deviations of the necked and flanged can body shall comply with the provisions of Figure 3 and Table 1. D2
Figure 3 Schematic diagram of main dimensions of tank body
Table 1 Main dimensions of tank body
Height of tank body
Outer diameter of tank
Inner diameter of neck
Flanging width
: Tool guarantee dimension.
Main dimensions and limit deviations of easy-open end
Nominal dimensions
Main dimensions and limit deviations of easy-open end shall comply with the provisions of Figure 4 and Table 2. 355mL
Schematic diagram of main dimensions of easy-open ends
GB/T29345—2012
Unit: mm
Limit deviation
GB/T29345—2012
Outer diameter of hook
Hook opening
Countersink
Hook height
Number of overlapping hooks per 50.80mm
5 Technical requirements
5.1 Basic requirements
Main dimensions of easy-open ends
Nominal dimensions
5.1.1 The structural dimensions of the product shall comply with the requirements of 4.3 of this standard. Special requirements shall be agreed upon by the supply and demand parties. 26±2
Unit: mm
Limit deviation
5.1.2 Different filling contents of products have different requirements for the physical and chemical properties of the inner coating and sealant. The manufacturer shall provide samples to the purchaser for filling tests and obtain confirmation.
Physical properties
The physical properties of the tank body shall comply with the provisions of Table 3 Table 3
Physical properties of tank body
Axial bearing pressure/kN
Compressive strength of tank bottom/kPa
Integrity of inner coating/mA
5.2.2 Coating quality
Beer tank body
Soft drink tank body
≥620
No more than 10 for each, no more than 3 on average
No more than 5 for each, no more than 1 on average
The inner and outer coatings of the tank body shall be cured and well adhered. If the contents have sterilization process requirements, according to the sterilization process requirements, there shall be no defects such as falling off, discoloration and blistering after pasteurization or high temperature sterilization. 5.2.3 Sensory quality
See Table 4 for sensory quality requirements.
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
Table 4 Sensory quality requirements for can body
Defect content
GB/T29345—2012
Acceptance quality limit
Impurities in the inner coating, obvious oil stains or other debris in the can, pinholes, damage to the inner coating caused by bending or concave decay of the can body, flange defects or dents, incomplete flange, flange Cracks, burrs on the flange, obvious odor
The paint is in drops and spots on the inner wall of the can, bubbles larger than 2mm on the bottom inner coating, bottom deformation, can body bending or dent length larger than 10mm without causing damage to the inner coating, neck shrinkage wrinkles
Inner coating stains, slight misalignment of printing color, partial incompleteness of printing color and varnish, small scratches, slight difference between printing color and color plate, slight fold of neck shrinkage, slight damage to the bottom metal. The pattern and color of the product shall be determined by negotiation between the supply and demand parties. 5.2.3.2
Easy to open end
Physical properties
The physical properties of the easy to open end shall comply with the requirements of Table 5. Table 5 Physical properties of easy-open lids
Item name
Compressive strength/kPa
Sealing
Inner coating integrity/mA
Pulling force/N
Full opening force/N
Opening reliability
Sealing glue dry film volume/mm
5.3.2 Coating quality
Beer cap
Soft drink cap
≥620
Leakage is not allowed
Single not more than 75, average not more than 50
Single not more than 30, average not more than 8
Single not more than 31, average not more than 20
Single not more than 45, average not more than 36
The pull ring (sheet) does not fall off when opening and is fully opened 40±5
The inner and outer coatings of the easy-open cap should be cured and well adhered. If the contents have sterilization process requirements, there should be no defects such as falling off, discoloration and bubbling after pasteurization or high-temperature sterilization according to the sterilization process requirements. 5.3.3 Sensory quality
See Table 6 for sensory quality requirements.
GB/T29345—2012
Easy to open ends
Unqualified classification
Class A unqualified
Class B unqualified
Class C unqualified
5.4 Hygiene requirements
Table 6 Sensory quality requirements for easy open ends
Defect content
Damage, obvious oil stains and pollution on the inside of the cap, no sealing glue, shoulder glue height less than 1.4mm, obvious odor, coating layer peeling or shedding, severe wrinkles on the hook edge, no pull ring (piece) sealing glue adhesion, local coating leakage greater than 2mm, obvious deformation of the hook edge, scratches on the inside and outside coating film, but the metal is not exposed, slight wrinkles and deformation of the hook edge, uneven overlapping of the sealing glue
The inner wall coating of the product shall comply with the provisions of GB11677. 5.4.2 Easy-open end sealant shall comply with the provisions of GB4806.1. 6 Test methods
6.1 Sensory inspection
Use visual inspection, under natural light, with normal vision at a distance of 60cm. 6.2 Dimensional inspection
Measure with a special or general measuring tool (instrument), and the minimum reading value of the measuring tool (instrument) shall not exceed 0.01mm. 6.3 Integrity test of internal coating film in can body
Acceptance quality limit
Use an internal coating film integrity tester with a minimum reading value of no more than 0.1mA, add electrolyte into the can, the liquid level is 3mm from the can mouth, and read the current value in the 4th second.
The electrolyte is a 2% (mass concentration) sodium sulfate aqueous solution. 6.4 Can bottom pressure resistance test
Use a can bottom pressure resistance tester with a minimum reading value of no more than 1kPa, and read the maximum reading value of the deformation of the can bottom. 6.5 Test of axial bearing pressure of tank body
Use the axial bearing pressure tester of tank body with the minimum reading value not more than 10N to read the maximum reading value of the deformation of the tank body. 6.6 Test of breaking force and full opening force of easy-open lid
6.6.1 Use the breaking force/full opening force tester with the minimum reading value not more than 1N, and the full stroke time of the test is 15s. 6.6.2 Test of breaking force and full opening force of pull ring type: Place the easy-open lid on the measuring bracket, fix the bracket at a backward tilt of 30° (i.e. 60° to the horizontal), and read the readings at the moment of lid opening and when the pull ring tongue is completely torn off the lid body. 6.6.3 Test of breaking force and full opening force of retaining piece type: Place the easy-open lid on the horizontal bracket, with the bracket and the tension chain at 60°, and read the readings at the moment of lid opening and when the tongue is fully opened according to the pre-marked line. 6
6.7 Easy-open end compression strength test
GB/T29345-2012
Use an easy-open end compression strength tester with a minimum reading value of no more than 1kPa to read the reading value when the cover is deformed. 6.8 Easy-open end inner coating integrity test
Use an inner coating integrity tester with a minimum reading value of no more than 0.1mA to test the inner coating of the cover and read the current value at the 4th second. The electrolyte is a 1% (mass concentration) sodium chloride aqueous solution. 6.9 Internal and external coating sterilization test
6.9.1 For pasteurization, use a constant temperature water bath, put the sample into distilled water at a temperature of (68±2)℃, keep the temperature constant for 30 minutes, then take it out and check whether the inner and outer coatings have discoloration, bubbling, shedding, etc. 6.9.2 High temperature sterilization, the can body is hot filled with 80℃ distilled water, and the can is sealed with a cover. Put the sample into a high temperature steamer, add an appropriate amount of distilled water, heat to 121℃ and keep it for 30 minutes, take out the sample, pour out the distilled water in the sample after cooling, and check whether the internal and external coatings have discoloration, bubbling, shedding, etc. after natural drying. 6.10 Easy-open cover leakage test
When conducting the test in 6.7, keep the test pressure at 620kPa for 1min. Observe whether the sample has leakage. 6.11 Sealing glue dry film volume
Use an analytical balance with a sensitivity of 0.1mg, remove the easy-open cover pull ring, weigh it as m1, then remove the sealing glue, and weigh it after drying as m2. The mass of the sealing glue dry film is the difference between ml and m2. Calculate according to the formula V=(mi-m2)/p, and the calculation result should meet the requirements of Table 5. The value e is the density of the sealant provided by the supplier. 6.12 Opening reliability test
Open the easy-open cover forward by hand or with a simple tool, and observe whether the pull ring (piece) falls off and is fully opened. 6.13 Hygiene inspection
Hygiene requirements shall be carried out in accordance with GB5009.60, GB5009.64, and GB5009.69. 7 Inspection rules
7.1 Products of the same variety and specification delivered in the same batch shall be the same inspection batch. 7.2 Product quality shall be inspected in accordance with the indicators and methods specified in this standard, and sampling inspection shall be carried out in accordance with the secondary sampling plan of 11.1.2 of GB/T2828.1--2003.
7.3 The quality department of the manufacturer shall inspect the products in accordance with the provisions of this standard and issue a certificate of conformity. 7.4 Product inspection is divided into factory inspection and type inspection. 7.4.1 Factory inspection
5.1.1, 5.2.3, and 5.3.3 in this standard are factory inspection items. 7.4.2 Type inspection
7.4.2.1 The contents of Chapter 5 (except Article 5.1.2) of this standard are type inspection items. 7.4.2.2 Type inspection should be carried out in any of the following situations: a) Product or old product conversion trial production and type identification; 7
GB/T29345-2012
When the structure, material, process changes may affect the product performance; Normal production, inspection every six months; c
When production is resumed after a long-term suspension;
When the factory inspection results are significantly different from the last type inspection; e
When the national quality supervision agency proposes a requirement for type inspection. Sampling inspection regulations
Factory inspection and type inspection (except hygiene requirements) shall be sampled and inspected in accordance with the regulations listed in Tables 7 and 8. Table 7 Inspection Items AQL Value
Easy to open end
Inspection Items
Compressive Strength
Axial Bearing Pressure
Integrity of Internal Coating
Coating Quality
Compressive Strength
Sealing
Integrity of Internal Coating
Opening Force
Full Opening Force
Opening Reliability
Dry Film Volume of Sealing Glue
Coating Quality
Batch Inspection Level (IL)||t t||Classification of non-conformity
Class A non-conformity
Class B non-conformity
Class C non-conformity
Class C non-conformity
Class B non-conformity
Class A non-conformity
Class B non-conformity
Class A non-conformity (high temperature sterilization and filling)
Class A non-conformity
Class B non-conformity
Class C non-conformity
Class C non-conformity
Class B non-conformity||tt ||Class A unqualified
Class A unqualified
Class B unqualified
Class B unqualified
Class A unqualified
Class C unqualified
Class B unqualified
Class A unqualified (high temperature sterilization and filling)
Acceptance quality limit
Inspection level
Batch range
≥35001
35001~500000
≥500001
≥3 5001~500000
≥500.001
7.4.4 Qualified batch determination
Table 8 Normal inspection secondary sampling plan
Acceptance quality plate limit
Number of samples
ny-n-8
n=n2=20
n=nz=32
ni=nz=50
n—nz=80
If all the inspection results of all inspection items are qualified, the batch of products is judged to be qualified. 7.5 The user can conduct inspection according to the regulations listed in Table 7 and Table 8 or the order contract. 8 Marking
8.1 The can body and easy-open cover should have the manufacturer's logo. GB/T29345—2012
Determination array
[A,A,R,Ra]
[0,1,2,2]
[1,4,3,5]
[2,6,5,7]
[0,1,2,2]
[2,6,5,7]
[3,9,6,10]
[0,3,3,4]］
[3,9,6,10]
[5,12,9,13]
8.2 The pallet packaging or packaging box of the product shall be accompanied by an inspection certificate, which shall indicate the manufacturer's name, product name, specifications, manufacturing date, batch number, quantity and inspection mark.
8.3 The recycling mark shall comply with the provisions of GB/T18455. 9 Packaging
9.1 Requirements for packaging materials
The packaging materials shall be clean, dry, non-toxic and harmless, and no odor or pollution is allowed. 9.2 Can packaging
9.2.1 Cans are packaged in pallets. The size of the pallet is determined according to the requirements of the user and transportation. The number of cans per layer and the number of layers are agreed upon by the supply and demand parties. The layers are separated by neutral cardboard or suitable materials. After the top plate is placed, they are tied with packing tape and then wrapped with plastic film. 9.2.2 The top plate and pallet are made of untreated wood or other suitable materials. 9.3 Easy-open lid packaging
9.3.1 Easy-open lids are packaged in neutral packaging paper bags or suitable materials. It is not allowed to seal the bags with staples or nails. 9.3.2 After the easy-open lids are bagged, they are packaged in packaging boxes or pallets. Other reliable packaging methods are also available. 9
GB/T29345—2012
10 Transportation
10.1 The means of transportation should be clean and dry, and no odor or pollution is allowed. When transported by container or other means, it should be protected from rain, sunlight, moisture pollution and damage. 10.2 Other requirements for transportation shall be implemented in accordance with relevant regulations. 11 Storage
The product should be stored in a dry, ventilated and clean warehouse, free from pollution, damage and direct sunlight.
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