Some standard content:
National Standard of the People's Republic of China
Test Methods for Packaging Materials
Compatibility
Test nf packaging materials-Compatabilfty1Subject Content and Scope of Application
GB/T 16265--1996
This standard specifies whether packaging materials will cause relative or unilateral deterioration when they are in contact with or kept close to various materials in a controlled environment for a certain period of time, so as to determine the compatibility of these materials. This standard is applicable to the compatibility inspection of the following materials: a. medium-grade packaging materials and metals, plastics or other solid materials to be packaged; b. gas phase rust-proof packaging materials and gold screen materials to be packaged; c. gas phase rust-proof packaging materials and heat-sealable packaging materials; d. corrugated, semi-corrugated peelable plastics, coatings and protected metals or other solid materials. 2 Reference standards
GB 678 Chemical reagents
, ethanol (anhydrous ethanol)
GB 679
G13 687
Chemical reagents
95% ethanol
Chemical reagents Propylene glycol (glycerol)
GB 1922 Solvent oil
GB 2040 Brass plate
GB3193 Aluminum alloy hot-rolled plate
GB10455
GH 10586
3 Terminology
Silica gel desiccant for packaging
Technical conditions for hot and humid test chamber
3.1 Corrogation
Material deterioration caused by chemical reaction. This change is usually caused by oxidation, acid or alkali, electrochemical and other effects. In this test, as long as spots, corrosion points or loose or granular products are formed on the surface of the sample, it is considered to be corrosion. 3.2 Disease
Material corrosion or reduced performance.
3.3 Discoloration51ain
Only color change occurs during the test without rust spots, corrosion points or surface deterioration. This discoloration is not considered corrosion in this test. 3.4 Test surface
Refers to the surface of the material that has been specially processed. It is checked after the test to determine the degree of deterioration of the material. 4 Instruments, materials, reagents, test pieces and samples 4.1 Instruments and materials
Approved by the State Administration of Technical Supervision on March 12, 1996 and implemented on September 1, 1996
Wet heat test chamber: in accordance with G10586
GB/T 162651996
Electric constant temperature drying oven: (100~300)℃±1℃Glass dryer: 1000ml*120mm±5mm: nylon thread or plastic thread,
S-type stainless steel glass hook;
Stainless steel test piece rack;
Hair dryer: hot and cold dual purpose:
Evaporation, 500mL
Forged: 300mmz
Medical gauze and absorbent cotton;
Embrane cloth: 180*, 200*, 220*, 240*
Dry sandpaper: particle size 100 mesh.
4.2 Reagents
Non-alcohol: in accordance with GB678+
95% alcohol: in accordance with GB 679 1
Glycerol: in accordance with GB 687;
Solvent oil: in accordance with NY190 silica gel in GH1922 standard; fine pore type, in accordance with GB10455.
4.3 Test pieces and specimens
4.3.1 Test pieces: selected according to the actual contents of the package. When not specified, H62 brass, LY12 aluminum, T3 or T4 copper, zinc-plated passivated steel, and cadmium-plated passivated steel test pieces that meet the standards are generally selected. The metal test piece without coating is first processed by a grinder to a surface roughness of R.0.8 μm. The test piece dimensions are respectively 100 mm long, 50 mm wide, 45 mm thick (for arbitration test) and 40 mm long, 15 mm wide, 3~5 mm thick. Before the test, the long side surface roughness is R.0.4~0.6 μm alternately with 180~240 sandpaper (or sandpaper). After grinding, the grinding lines on the test piece should be parallel and consistent, and there should be no pits, scratches or rust on the surface. The edges and holes on the test piece should be processed with a drill, dry sandpaper or assorted files. The coated or other non-metallic materials do not need to be processed or polished. The test piece can be directly cut from a simulated part or according to the above size. 4.3.2 Test piece
refers to the material to be tested in Chapter 1 of this standard.
Unless otherwise specified, the packaging material samples to be tested should be selected at will and have a sufficient number to fully represent the material to be evaluated. 4.3.3 Pretreatment of test pieces and samplesbzxZ.net
Except for materials that cannot come into contact with solvents or ethanol, the prepared test pieces and samples, except for materials that cannot come into contact with solvents or ethanol, are evaporated with a 500mL porcelain evaporator containing only solvent oil, one containing 95% ethanol, and one containing anhydrous ethanol. Use tweezers to hold the test piece or sample and absorbent cotton or gauze and clean them in the above order, then blow dry with hot air, and test after cooling to room temperature. If it cannot be put into the test continuously, it should be placed in a desiccator containing fine-porous silica gel, but it must be used within five hours, otherwise it should be cleaned again. 5 Test procedure
5.1 Test procedure A
Check the compatibility of the neutral packaging material with the metal, plastic or other solid materials being packaged. 5,7.1 Wrap each metal test piece or plastic test piece tightly with the neutral packaging material sample. When wrapping, the area near the longitudinal center line of the test surface should be the effective layer and the two sides should be single layers. Then, the length of the test piece should be Fold the two ends of the test piece in the direction to the test surface, tie the folded layer tightly with a rope along the longitudinal direction of the test piece, and hang it in the exposure environment for the test. 5.1.2 Unless otherwise specified in the contract or order, the above-mentioned wrapped test piece should be hung vertically in a damp heat test box at (39±1)°C and relative humidity not exceeding 95%, which meets the requirements of GB10586, and the test should be carried out for 72h+. Unwrap and inspect and record the deterioration of the metal or plastic test piece and the packaging material test piece.
GB/T 16265 -- 1996
5.1.3 When corrosion is suspected on the copper test piece, drop a drop of the newly prepared sodium diazide solution on the suspected part. Many small bubbles will immediately appear in the droplet and rise to the liquid surface, indicating that sulfide exists on the sample, proving that the sample has been corroded. If the bubbles are observed slowly and continuously under a 5x magnifying glass, it cannot prove that sulfide exists. 5.2 Test Procedure B
Check the compatibility of the gas phase anti-rust packaging material with the metal material being packaged. 5.2. Cut a 400mm×60mm gas phase anti-rust packaging material and place it on the non- The coating surface is close to the upper inner wall of the 1000mL desiccator, and then the test piece rack is assembled. The test body is as shown below. 50mL of glycerol aqueous solution with a density of 1.0856±0.0004g/mL is injected into the bottom of the desiccator and the desiccator is placed in an oven at (60±1)℃ for 2h. 1000ml "exploder
Stainless steel wire hook
Stainless steel wire test piece rack
Glycerol water storage
Test process B assembly diagram
5.2.2 Hang the test piece pretreated according to 4.3.3 on the test piece rack in the dryer which has been placed in an oven at (60±1)°C for 2h. The distance between the test piece and the packaged metal material should not exceed 30mm, and the hanging height should be moderate. Apply a small amount of vanishing oil or vacuum sealing oil on the grinding edge of the cover of the blasting device, cover it and fix it with adhesive tape. Use three test pieces of each material for half-line test, and put another three test pieces into the dryer without the same anti-rust packaging material for comparative test. 5.2.3 Put the dryer with the test pieces hung into (60±1)°C. 1) In the oven at C: When the desiccator reaches this temperature, the relative humidity inside is (90°C + 3°C). The test is heated for 8 hours each time, and the heating is stopped for 16 hours. Each 24 hours is a cycle. If there is no provision in the contract or order, the desiccator shall be taken out of the oven after one cycle, cooled to room temperature, and the desiccator shall be opened to check the test piece: 5.2.4 This procedure B can be used to check the compatibility of materials that can be degreased, coated with other liquids or colloids, or semi-solid compounds, but the test piece shall be coated with oil or other compounds according to the process specified when using it, and the blank test piece shall not be coated. When checking, the oil or other compounds shall be removed, and the coating shall be removed with a suitable solvent, and then the test piece or sample shall be carefully checked. 5.3 Test procedure C
Check the compatibility of the gas phase anti-rust packaging material with the heat-sealable packaging material. 5.3.1 Unless otherwise specified in the contract or order, each group of tests shall be repeated three times in the following manner, and each group of materials shall be compared with neutral kraft paper and vapor phase anti-inducing packaging materials.
5.3.2 Sample combination
Cut the heat-sealable packaging material into 254m×130mm, fold it in half to form a bag, and put a bag weighing 16.3kg of flat-surfaced objects are placed on the fold [E30 (each 254mm long fold bears 2.72kg of weight). Heat the two sides to make a 127mm long bag, and wrap a clean and dry steel test piece of GB/T16265-1996
with a size of 100mm×50mm×(4～6)mm with vapor phase corrosion inhibitor packaging material, with the side coated with vapor phase corrosion inhibitor facing the heat-sealable packaging material test piece. When wrapping, the test piece should be double-layered near the longitudinal center line, and single-layered on both sides. Put the wrapped test piece into the bag, press out the air in the bag by hand, and heat-weld the opening of the bag. 5.3.3 Place the sample assembly prepared in 5.3.2 in an oven with a constant temperature of (60±1)C for 168 hours. After the bag cools to the temperature, cut the welded side and take out the wrapped test piece. Check the deterioration of heat-sealable packaging materials 5.4 Test procedure D
Check the compatibility of liquid, semi-liquid peelable plastics or coatings with the protected metal or plastic and other surface materials. 5.4.1 Pour the liquid or semi-liquid peelable plastic or coating sample into a clean sealable glass container. The height of the sample in the glass container is half of the length of the test piece. Put the solid material such as metal or plastic specified in this standard into the liquid or semi-liquid sample so that half of the test surface of the test piece is exposed on the surface. Cover and seal the glass container and place it in the specified test environment. 5.4.2 Test environment
Test environment If placed in an air-conditioned atmosphere for one year, or in a (38 ± 1) dead environment for 30 days, 5.4.3 After the test, check the deterioration of the test piece and the sample. For example, whether the metal is corroded; whether the plastic is softened, cracked, bubbled, deformed, etc. Whether the color of liquid or semi-liquid peelable plastic becomes darker, whether there are lumps, gelation, precipitation, high or defects that affect use. If necessary, the performance of the sample can be checked as specified.
6 Result evaluation
The test results of this standard, regardless of the material and test procedure, are mainly compared with the blank sample. As long as the test piece and the sample are not deteriorated, and the deterioration is not heavier than the blank, they are qualified. Even if one group or one piece is heavier than the blank, the test needs to be repeated. If three groups or three pieces are heavier than the blank point or one group or one piece is still heavier than the blank after repeated tests, they are unqualified. 7 Test report
The test report includes the following:
a. This standard number 1
b. Detailed description of the test piece and sample used for the test, including type, size, quantity, state, etc. Pretreatment conditions
d. Test environment conditions
e. Test parameters:
1. Test result evaluation!
g. Differences from this standard during the test process: h. Test date, tester signature, test unit seal. Additional Notes
This standard was proposed by China National Packaging Corporation. This standard is under the jurisdiction of the National Technical Committee for Packaging Standardization. This standard was drafted by the 631st Institute of China Aviation Industry Corporation, Shenyang Anti-Rust Packaging Materials Company, China Light Industry Association Papermaking Research Institute, and National Packaging Product Quality Supervision and Inspection Center (Jinan). The main drafters of this standard are Luo Xiangji, Zhou Yan, Zhang Shaoling, and Ding Guo. This standard refers to the H capacitance of method 3004 materials in the US Federal Standard FEI)-STD-101 & Packaging Equipment Test Procedures.
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