This standard specifies the waterproof level, requirements, packaging methods, test methods and markings of packaging. This standard applies to industrial products such as machinery and electronics, and other products can also refer to it. GB/T 7350-1999 Waterproof packaging GB/T7350-1999 Standard download decompression password: www.bzxz.net
This standard specifies the waterproof level, requirements, packaging methods, test methods and markings of packaging. This standard applies to industrial products such as machinery and electronics, and other products can also refer to it.

GB/T7350—1999
Waterproof packaging is a protective measure taken to prevent the quality of industrial products such as machinery and electronics from being affected by water during circulation.
This standard mainly revised the following contents when GB/T73501987 "Technical Conditions for Waterproof Packaging" was revised: a small number of uncommon structures were removed from the commonly used waterproof packaging methods (container structures), and some new waterproof materials were added and revised into Appendix A (indicative appendix).
This standard will replace GB/T7350—1987 from the date of implementation. Appendix A of this standard is an indicative appendix.
This standard was proposed by China Packaging Corporation. This standard is under the jurisdiction of the National Packaging Standardization Technical Committee. The responsible drafting units of this standard are: Mechanical Science Research Institute, Changzhou Shenglong Packaging Materials Co., Ltd. The main drafters of this standard are: Li Xuelong, Ma Yaoliang, Yang Lu, Huang Xue, Chen Guoyao. This standard was first issued on February 26, 1987. 403
1 Scope
National Standard of the People's Republic of China
Waterproof packaging
Waterproof packaging
This standard specifies the waterproof level, requirements, packaging methods, test methods and markings of packaging. This standard is applicable to industrial products such as machinery and electronics, and other products can also refer to it. 2 Reference standards
GB/T 7350-1999
Replaces GB/T7350—1987
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB191—1990 Pictorial symbols for packaging, storage and transportation
GB/T4857.9—1992 Spray test method for packaging and transportation packages (eqvISO2875:1985) GB/T4857.12—1992 Immersion test method for packaging and transportation packages (eqvISO8478:1986) 3 Waterproof packaging level
3.1 When a product requires waterproof packaging, the waterproof packaging level requirements for the product packaging must be specified in the product technical documents. 3.2 The waterproof level of the packaging should be determined based on factors such as the nature of the product, the circulation environment, and possible water damage. 3.3 The waterproof packaging level is divided into Class A level 1 packaging, level 2 packaging, level 3 packaging and Class B level 1 packaging, level 2 packaging, level 3 packaging, see Table 1 for details.
Table 1 Waterproof packaging level
1st level packaging
2nd level packaging
3rd level packaging
1st level packaging
2nd level packaging
3rd level packaging
3.4 ​​Waterproof packaging level selection principles
Perform water test according to GB/T4857.12, test time 60minPerform water test according to GB/T4857.12, test time 30minPerform immersion test according to GB/T 4857.12, test time 5minPerform spray test according to GB/T4857.9, test time 120minPerform water test according to GB/T 4857.9 spray test, test time 60min. GB/T4857.9 spray test, test time 5min. 3.4.1 If the packaged product is in bad environmental conditions during storage and transportation, it may be damaged by water and sink under the water surface for a certain period of time. Class A 1 packaging can be selected.
3.4.2 If the packaged product is in bad environmental conditions during storage and transportation, it may be damaged by water and sink under the water surface for a short period of time. Class A 2 packaging can be selected.
3.4.3 If the bottom or part of the packaged product is in bad environmental conditions during storage and transportation, it may be immersed in water for a short period of time. Class A 3 packaging can be selected. 3.4.4 If the package is basically stored in the open air during storage and transportation, Class B Level 1 packaging can be used. Approved by the State Administration of Quality and Technical Supervision on September 7, 1999 404
2000-02-01 implementation
GB/T 7350—1999
3.4.5 If the package is stored in the open air for part of the time during storage and transportation, Class B Level 2 packaging can be used. 3.4.6 If the package may be exposed to rain for a short period of time during storage and transportation, Class B Level 3 packaging can be used. 4 Requirements
4.1 General requirements
4.1.1 Waterproof packaging should ensure that the product quality will not be affected by water seepage due to poor waterproof packaging within one year from the date of leaving the factory. 4.1.2 Waterproof packaging is generally used on the outer packaging. If necessary, waterproof measures can also be taken on the inner packaging. 4.1.3 Waterproof packaging containers should be tightly sealed after filling with products. 4.1.4 Rainproof measures should be taken for the ventilation holes of the outer packaging box to prevent rainwater from intruding. 4.2 Material requirements
4.2.1 Waterproof packaging materials should have good water resistance. Commonly used waterproof packaging materials include: polyethylene low-foaming waterproof barrier film, composite film, plastic film, oil paper, etc. Auxiliary materials include: waterproof adhesive tape, waterproof adhesive, etc. 4.2.2 The quality of the selected waterproof packaging materials should comply with the provisions of relevant product standards and relevant national laws and regulations. 4.2.3 Waterproof packaging materials should have a certain strength to withstand various mechanical hazards during the circulation process. 4.2.4 In addition to requiring a certain strength and water resistance, the waterproof packaging materials used for the outermost should also have anti-aging, anti-pollution, anti-insect bite, and anti-disease properties.
4.2.5 The waterproof packaging materials used for the top covers of large and medium-sized wooden boxes should have sufficient length and width, with a margin of not less than 100mm. 4.2.6 When waterproof materials need to be spliced, the overlap method should be convenient for rainwater to flow out, and the overlap width should be not less than 60mm. 4.3 Environmental requirements
The packaging environment should be clean, dry, and free of harmful substances. 5 Waterproof packaging methods
Common waterproof packaging methods (container structures) can be selected according to Appendix A (suggested appendix). 6 Test methods
6.1 Class A level 1 packaging, level 2 packaging, and level 3 packaging shall be carried out in accordance with the relevant provisions of GB/T4857.12. 6.2 Class B level 1 packaging, level 2 packaging, and level 3 packaging shall be carried out in accordance with the relevant provisions of GB/T4857.9. 6.3 After the package is tested, the outer packaging container should not have obvious deformation. The markings on the box surface should be firm and clear. 6.4 After the package is tested, the waterproof sealing degree of the package shall meet one of the following requirements according to the nature of the product: a) There is no water seepage or leakage in the package.
b) There is no obvious water seepage in the package.
c) There is no obvious water leakage in the outer package. There should be no water stains on the inner package. 7 Marking
The moisture-sensitive mark of the package shall be marked on the outside of the package in accordance with the provisions of GB191. 405
GB/T7350—1999
Appendix A
(Suggestive Appendix)
Common waterproof packaging methods (container structure) A1 Common waterproof packaging methods (container structure) can be selected by referring to Table A1. Table A1 Commonly used waterproof packaging methods (container structure) Category
Box board splicing method
(Example)
Metal plate splicing method
(Example)
Overlap width
Structure diagram
Butt joint
Pressed jointWww.bzxZ.net
Sampled groove joint adopts groove width and tongue height to join Depth of depression
Welding seam width
[Bottom]
Barrel (box) Overlap Welding of side seams
Connection between barrel body and barrel neck (bottom)
Connection between barrel body and barrel top (bottom) (2)
Waterproof material splicing method
Example)
Waterproof material setting method
(Example)
Ventilation hole rain shielding method
(Example)
Waterproof material
Waterproof material
External whole board
Plastic mesh
GB/T 7350
Table A1 (continued)
Structural diagram
Waterproof material
Waterproof material
Inside of this container
Top of wooden container
Waterproof material
Inner support
Baiye fungus
Waterproof material is laid on the inner wall of the box and overlapped
Waterproof material is laid on the outer wall of the box and overlapped
Wooden box board is doubled Connect or press the edge to connect the chain (Note: the six sides inside the box are all covered with waterproof materials)
The top of the box adopts double-layer waterproof material, and the outer waterproof material extends out of the box edge by no less than 100mm
Plastic mesh is nailed to the outside of the ventilation hole, and shutters are added to block rain 407
Rain protection method for ventilation hole
(example)
Sealing method
(example)
Waterproof material
GB/T 7350—1999
Table A1 (continued)
Structural schematic
Waterproof liner
Bag seal
Box seal
Rainproof blue
Waterproof adhesive
Waterproof adhesive tape
Waterproof adhesive tape
Container seal
Sealing enclosure
Rainproof cover on the outside of the inclined ventilation hole
Bags made of composite materials, sealed with heat welding or adhesive treatment of waterproof carton and calcium plastic box. The seams are sealed with waterproof adhesive tape
Container mouth is sealed with threaded compression seal ring
Sealing method
(Example)
GB/T7350 ---1999
Table A1 (end)
Structural diagram
Barrel sealing
Opening sealing
Screw hole sealing
Waterproof material
Connection sealing
Waterproof material
Sealing pad
Sealing pad
Waterproof sealing material
Barrel cover is tightly sealed with side hoop
Lock it with lock buckle to press the sealing pad (ring) to make the opening sealed
When waterproof material needs to be nailed through, add sealing pad to seal When the contents pass through the waterproof material and are fixed on the container, add waterproof material to seal the perforation
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