QB/T 2341-1997 Paper lunch box

This standard specifies the technical specifications for lunch box paperboard and paper lunch boxes. This standard applies to paper lunch boxes produced with plant fiber as the main raw material, and does not apply to lunch boxes with film or coating. QB/T 2341-1997 Paper lunch box QB/T2341-1997 standard download decompression password: www.bzxz.net

Food Standards Network (http://spbz.cn/) Paper lunch boxes
QB/T2341-1997
The technical indicators, sanitary indicators and toxicological tests of this standard are all formulated based on the characteristics of paper lunch boxes.
This standard is proposed by the Food Papermaking Department of China Light Industry Association. This standard is under the jurisdiction of the National Papermaking Standardization Center. This standard was drafted by the China Pulp and Paper Industry Research Institute. The main drafters of this standard are: Zhang Shaoling, Chen Xi, Zhu Shengguang, Liu Jiangyi, Chen Shuo. This standard is published for the first time.
1 Scope
This standard specifies the technical specifications for lunch box paperboard and paper lunch boxes. This standard applies to paper lunch boxes produced with plant fibers as the main raw material, and does not apply to lunch boxes with film and coating.
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB/T450-89 Paper and paperboard sample collection GB/T451.1-89 Paper and paperboard size and deflection determination method GB/T451.2-89 Paper and paperboard quantitative determination method GB/T451.3-89 Paper and paperboard thickness determination method GB/T462-89 Paper and paperboard moisture determination method GB/T1539-89 Paperboard bursting strength determination method 1
Food Standard Network (http://spbz.cn/) GB/T1540-89 Paper and paperboard water absorption determination method (Kebo method) GB/T2679.3-1996 Paper and paperboard stiffness determination method GB/T2679.5-1995 Paper and paperboard folding endurance determination method (MIT folding endurance instrument method) GB/T2679.8-1995 Paper and paperboard ring compression strength determination method GB/T2679.10-93 Paper Method for determination of short-distance compression strength of paper and paperboard GB/T2828-87 Batch inspection counting sampling procedure and sampling table GB/T3561-89 Analysis method for sanitary standards of base paper for food packaging GB/T5009.60-1996 Analysis method for sanitary standards of polyethylene, polystyrene and polypropylene moldings for food packaging
GB/T7974-87 Determination of whiteness of paper and paperboard (diffuse/vertical method) GB/T10342-89 Packaging and marking of paper GB/T10739-89 Standard atmosphere for handling and testing of pulp, paper and paperboard samples GB15193.1-94 Procedure for toxicological evaluation of food safety 3 Technical requirements and test methods
3.1 Technical indicators
3.1.1 The technical indicators of lunch box paperboard and paper lunch box shall comply with the requirements of Table 1 and Table 2 respectively, or the provisions of the order contract.
3.1.2 The physical properties, sample preparation, treatment and testing specified in Table 1 shall be carried out under the standard atmospheric conditions of temperature (23 ± 1) ℃ and relative humidity (50 ± 2)% specified in GB/T10739. Table 1
Indicator name
Test methodbzxz.net
Quantitative (G) Tolerance
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GB/T451.2
Thickness (T) Tolerance
GB/T451.3
Folding endurance (transverse)
GB/T2679.5
Burst endurance
GB/T1539
GB/T26 79.3
*Ring pressure strength (transverse) ≥
GB/T2679.8
*Short-distance compression (transverse)
GB/T2679.10
Food Standard Network (http://spbz.cn/)3
Printing surface
GB/T7974
Oil-proof and waterproof surface
Surface water absorption
Printing surface
g/m2 (3 min)
GB/T1540
Oil-proof and waterproof surface
Delivery moisture
GB/T462
Food Standard Network (http://spbz.cn/)Note: G standard quantitative; T standard thickness
*Choose either ring pressure strength or short-distance compression. As long as the corresponding index requirements are met, it can be judged as qualified. 3.1.3 The basis weight (G) and thickness (T) of lunch box paperboard are determined by the manufacturer based on the use requirements. This standard requires that it meet the deviation requirements. 3.1.4 The specifications and dimensions of lunch box paperboard shall be measured in accordance with GB/T451.1 and shall meet the following requirements: 787mm, 1092mm; 880mm, 1230mm. The dimensional deviation shall not exceed ±5mm, and the deflection shall not exceed 3mm. Other specifications and dimensions of paperboard may also be produced according to contract requirements. 3.1.5 Paper lunch boxes formed from paperboard shall use lunch box paperboard that meets the requirements of Table 1, and paper lunch boxes formed by pulp molding and processing and folding shall meet the requirements of Table 2. Table 2
Indicator name
IKAONTKAca-
Test method
Large size 600±25
500±25
Small size 400±10
Appendix A
Water resistance (90±
Oil resistance (150±
Waterproof
Oilproof
Appendix A
Load-bearing performance
(Height change)
Appendix A
Box cover folding times
Appendix A
3.2 Hygiene indicators
Food Standards Network (http://spbz.cn/) 3.2.1 Lunch box paperboard and paper lunch box should meet the physical and chemical indicators in Table 3 and the microbiological indicators in Table 4 Requirements Table 3
Indicator Name
Test Method
Lead (in terms of Pb)
GB/T3561
Arsenic (in terms of As)
GB/T3561
Decolorization Test (Water, n-hexane)
GB/T3561
254nm and 365nm
GB/T3561
GB/T7974
Food Standards Network (http://spbz.cn/) Note: During arbitration, the method specified in GB/T7974 shall be used for judgment, and Rf≤2.0 shall be used. Table 4
Indicator Name
Test Method
IKAONTKAca-
. Coliform bacteria ≤
pieces/100g
GB/T3561
: Pathogenic bacteria
shall not be detected
GB/T3561
3.3 Toxicological test
Food Standards Network (http://spbz.cn/)3.3.1 The sample processing for toxicological test shall be carried out in accordance with GB/T5009.60, and the test method and result determination shall be carried out in accordance with GB15193.1.
3.4 ​​Appearance
3.4.1 The paper surface of the lunch box cardboard shall be smooth and uniform, and no folds, holes, pulp lumps or other paper defects that affect the use shall be allowed.
3.4.2 The color of the processed or molded paper lunch box shall be normal, without odor, and the surface shall be smooth and clean. 4 Inspection rules
4 .1 One delivery is considered as a batch. The sample unit of lunch box paperboard is ream or roll, and the sample unit of paper lunch box is piece.
4.2 The supplier shall ensure that the lunch box paperboard or paper lunch box it supplies meets the requirements of this standard. Each roll (ream, box) shall be accompanied by a quality certificate.
4.3 The delivery inspection items are specified in (3.1) and carried out in accordance with GB/T2828. The delivery inspection sampling plan, inspection level, qualified quality level (AQL) and batch quality determination shall be in accordance with Table 5. The sampling of samples shall be carried out in accordance with GB/T450.
4.4 The supplier shall ensure that the products provided meet the requirements of hygiene indicators (3.2). Before production, the product shall be subjected to a toxicological test (3.3). The product can only be put into production if the toxicological test results meet the requirements of GB15193.1. Under the conditions of continuous production with stable process conditions and raw materials, the hygiene indicators (3.2) shall be measured every three months. If the process conditions or other conditions change, the determinations of (3.3) and (3.2) shall be carried out immediately. 4.5 The purchaser has the right to inspect and accept the batch according to the provisions of this standard. If there is any objection to the batch quality, the purchaser shall notify the supplier within three months after the arrival of the batch for joint re-inspection. If the batch does not meet the requirements of this standard, it shall be judged as unqualified and the supplier shall be responsible for handling it; if it meets the requirements of this standard, the purchaser shall be responsible for handling it. 7
Food Standards Network (http://spbz.cn/）Roll, ream, piece,
Normal secondary sampling inspection level S-2
Non-conforming classification
Sample size
Class B non-conforming products
Class C non-conforming products
Class B non-conforming
Class C non-conforming
AQL=10
≤150
Load-bearing performance
*Ring compression strength
*Short-distance compression
Quantitative deviation
Thickness deviation
Folding endurance (horizontal)
Burst endurance
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Food Food Standards Network (http://spbz.cn/) Brightness
Delivery moisture
Surface water absorption
Height change
Box cover fold times
151~35000
Food Standards Network (http://spbz.cn/) Note: *Choose one of the two, as long as the corresponding index requirements are met, it can be judged as qualified 5 Marking, packaging, transportation, storage
5.1 The packaging and marking of lunch box paperboard and paper lunch box shall be carried out in accordance with GB/T10342. Usually there shall be two layers of inner and outer packaging. The packaging shall be neat and the quantity shall be accurate, or it shall be carried out in accordance with the requirements of the order contract. 5.1.1 The inner packaging material must be clean, non-toxic, odorless, and dustproof and waterproof. The packaging box should be attached with an explanatory label and indicate the following: a) Product name, type, registered trademark, production license and health license number b) Manufacturer name, origin, batch number or production date, validity period c) Inspection pass mark and standard code.
5.2 Lunch box cardboard and paper lunch box should be well kept to prevent the influence of rain, snow and ground moisture. 5.3 Relevant units should strictly prevent pollution from toxic drugs and heavy metal dust during transportation and storage. 5.4 The shelf life of unopened batch products should not exceed 1 year. Expired products should be re-tested according to the requirements of (3.2). Only those that meet the standards can be used. Appendix A
Method for determining the performance of paper lunch boxes
(Appendix to the standard)
A1 Volume determination
Use a 1000mL measuring cylinder at room temperature to measure the corresponding volume of water and pour it into the paper lunch box. The large lunch box is 600mL, the medium lunch box is 500mL, and the small lunch box is 400mL. If there is no water overflow during self-test, it is qualified. A2 Water resistance test
Put the paper lunch box flat on the cardboard (or pulp board), pour in NaCl water with a temperature of (90±5)℃ and a concentration of about 5%, and then add 1 to 2 drops of methyl red indicator liquid. The height should not be less than 20mm. Pour out the water after 1 hour and observe whether there are any signs of leakage on the back and both sides. If no signs of leakage are found, it is qualified, otherwise it is judged as unqualified. 10
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A3 Oil resistance test
Food Standards Network (http://spbz.cn/) Add (10 s 2) mL of edible oil (peanut oil, soybean oil) at (150 s 10) ℃ to a paper lunch box with a porcelain spoon, and then place the paper lunch box on a napkin. After 1 hour, observe whether there are oil spots on the napkin. If there are no oil spots, it is qualified, otherwise it is unqualified.
A4 Load-bearing performance test
Put the paper lunch box flat on a flat plate and cover the lid. Use a metal ruler to measure the height of the paper lunch box (including the lid) to an accuracy of 1mm. Then pour in the mortar-sand mixture. After covering the lid, place a 200mm200mm
3mm flat glass on it. Then place a 3kg weight in the center of the flat glass. When the weight is loaded for 15s, immediately remove the base weight and the glass plate, and then accurately measure the above height. The load-bearing performance value of the sample is calculated by the following formula: HO-H
Where: W is the load-bearing performance value of the sample, %;
Ho is the height of the sample, mm.
H is the height of the sample after loading, mm.
Note: The slurry-sand mixture used for various types of paper lunch boxes is as follows: Large lunch box (600mL): 250mL water, 50g pulp and 200g sand: Medium lunch box (500mL): 200mL water, 40g pulp and 160g sand: Small lunch box (400mL): 150mL water, 30g pulp and 120g sand. A5 box cover folding test
Open and close the sample box cover at an angle of 180° for 15 times in a row, and observe that there should be no cracks or cracks at the connection with the box body. It can be used.
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