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　　纸餐盒是一种环保型的食品包装容器，通常由食品级纸张、牛皮纸或淋膜纸等材料制成。它既可以一次性使用，也可以根据需求使用可降解材质进行回收利用。纸餐盒广泛应用于外卖、快餐、便当和各种食品包装中，是替代塑料餐盒的优选。那么，如何对纸餐盒进行验货呢？纸餐盒验货的要求和方法有哪些？

　　Paper lunch box is an environmentally friendly food packaging container, usually made of materials such as food grade paper, kraft paper, or coated paper. It can be used once or recycled with biodegradable materials according to demand. Paper lunch boxes are widely used in takeout, fast food, bento, and various food packaging, and are the preferred alternative to plastic lunch boxes. So, how to inspect paper lunch boxes? What are the requirements and methods for inspecting paper lunch boxes?

　　外观要求

　　Appearance requirements

　　在自然光或日光灯下观察整个纸餐盒的外观，印刷及内壁涂层每个样品目测10只纸餐盒。

　　Observe the appearance, printing, and inner wall coating of the entire paper lunch box under natural light or fluorescent lamps, and visually inspect 10 paper lunch boxes per sample.

　　纸餐盒不应凹陷、起皱；淋膜层应均匀。纸餐盒印刷图案应轮廓清晰、色泽均匀、无明显色斑。纸餐盒应清洁无异物，且不应有异味。

　　Paper lunch boxes should not be dented or wrinkled; The coating layer should be uniform. The printed pattern on paper lunch boxes should have clear contours, uniform color, and no obvious color spots. The paper lunch box should be clean and free of foreign objects, and there should be no odor.

　　如果2只以上(含2只)的纸餐盒不符合规定，则判定该项不合格。

　　If two or more (including two) paper lunch boxes do not meet the requirements, the item will be judged as unqualified.

　　使用性能要求

　　Performance requirements for use

　　纸餐盒的使用性能应符合表1或合同的要求。

　　The performance of paper lunch boxes should meet the requirements of Table 1 or the contract.

　　盖体连接对折性能要求

　　Requirements for folding performance of lid connection

　　对于带盖纸盒试样，盖体对折15次，观察盖与盒体连接处有无裂纹。每个样品测定10只纸餐盒， 如果2只以上(含2只)的纸餐盒不符合规定，则判定该项不合格。

　　For the paper box sample with a lid, fold the lid in half 15 times and observe whether there are cracks at the connection between the lid and the box. Ten paper lunch boxes are tested for each sample. If two or more (including two) paper lunch boxes do not meet the requirements, the item is judged as unqualified.

　　尺寸偏差测定方法

　　Measurement method for dimensional deviation

　　用精度0.02 mm 的游标卡尺，分别测定底部长边、底部短边以及斜高。每个样品测定5个试样。结果用测定值中的最大值和最小值与平均值的差值表示。

　　Use a vernier caliper with an accuracy of 0.02 mm to measure the long and short sides of the bottom, as well as the slope height. Measure 5 samples for each sample. The result is expressed as the difference between the maximum and minimum values in the measured values and the average value.

　　耐温试验方法

　　Temperature resistance test method

　　将纸餐盒放在干燥的玻璃板上，分别注入95℃±5℃的食用油、水至距纸餐盒口部6 mm 处。盖 上盖静置30 min 后观察试样有无变形、开裂，表面有无起皮、起皱现象，并观察试样底部和侧面有无油 或水渗出或漏出。

　　Place the paper lunch box on a dry glass plate and inject 95 ℃± 5 ℃ edible oil and water separately until they are 6 mm away from the mouth of the paper lunch box. After covering and standing for 30 minutes, observe whether the sample is deformed or cracked, whether there is peeling or wrinkling on the surface, and observe whether there is oil or water seepage or leakage from the bottom and sides of the sample.

　　负重性能试验方法

　　Load bearing performance test method

　　试验设备

　　Test equipment

　　220尘尘×150尘尘×3尘尘的平板玻璃，3办驳砝码，准确度至1尘尘的金属直尺。

　　220mm x 150mm x 3mm flat glass, 3kg weight, metal ruler with accuracy up to 1mm.

　　试验步骤

　　Test steps

　　将纸餐盒盖打开倒扣在平滑的桌面上，再将平板玻璃放在盒底上。用金属尺测定平板玻璃下表面至水平桌面的高度。然后将3 kg砝码置于平板玻璃中央处，负重1min立即测定上述高度。分别测定2只纸餐盒，用式(1)计算每只试样的负重性能。取2只纸餐盒测定值的算术平均值，作为该纸餐盒的负重性能。

　　Open the paper lunch box cover and place it upside down on a smooth tabletop, then place the flat glass on the bottom of the box. Measure the height from the lower surface of the flat glass to the horizontal tabletop using a metal ruler. Then place a 3 kg weight in the center of the flat glass and load for 1 minute to immediately measure the above height. Measure 2 paper lunch boxes separately and calculate the load-bearing performance of each sample using equation (1). Take the arithmetic mean of the measured values of two paper lunch boxes as the load-bearing performance of the paper lunch box.

　　式中：

　　奥丑别谤别:

　　W  --负重性能，%;

　　W - Load bearing performance,%;

　　H? --试样高度，单位为毫米(mm);

　　H? - height of the specimen, measured in millimeters (mm);

　　H  --试样负重1min后的高度，单位为毫米(mm)。

　　H - The height of the specimen after being loaded for 1 minute, measured in millimeters (mm).

　　标志、包装要求

　　Marking and packaging requirements

　　纸餐盒的标志与包装应按骋叠/罢10342或合同的规定执行。

　　The marking and packaging of paper lunch boxes shall be in accordance with GB/T10342 or the provisions of the contract.

　　纸餐盒的所有包装材料应具有足够的密封性和牢固性，以保证纸餐盒在正常的运输与贮存条件下 不受污染。纸餐盒包装应防尘、防潮或防霉，直接与产物接触的包装材料应无毒、无害、清洁。

　　All packaging materials of paper lunch boxes should have sufficient sealing and firmness to ensure that the paper lunch boxes are not contaminated under normal transportation and storage conditions. Paper lunch box packaging should be dust-proof, moisture-proof, or mold proof, and packaging materials that come into direct contact with the product should be non-toxic, harmless, and clean.

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