紙餐盒是一種環保型的食品包裝容器，通常由食品級紙張、牛皮紙或淋膜紙等材料制成。它既可以一次性使用，也可以根據需求使用可降解材質進行回收利用。紙餐盒廣泛應用于外賣、快餐、便當和各種食品包裝中，是替代塑料餐盒的優選。那么，如何對紙餐盒進行驗貨呢？紙餐盒驗貨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?

　　外觀要求

　　Appearance requirements

　　在自然光或日光燈下觀察整個紙餐盒的外觀，印刷及內壁涂層每個樣品目測10只紙餐盒。

　　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.

　　紙餐盒不應凹陷、起皺；淋膜層應均勻。紙餐盒印刷圖案應輪廓清晰、色澤均勻、無明顯色斑。紙餐盒應清潔無異物，且不應有異味。

　　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)的紙餐盒不符合規定，則判定該項不合格。

　　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

　　紙餐盒的使用性能應符合表1或合同的要求。

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

　　蓋體連接對折性能要求

　　Requirements for folding performance of lid connection

　　對于帶蓋紙盒試樣，蓋體對折15次，觀察蓋與盒體連接處有無裂紋。每個樣品測定10只紙餐盒， 如果2只以上(含2只)的紙餐盒不符合規定，則判定該項不合格。

　　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.

　　尺寸偏差測定方法

　　Measurement method for dimensional deviation

　　用精度0.02 mm 的游標卡尺，分別測定底部長邊、底部短邊以及斜高。每個樣品測定5個試樣。結果用測定值中的最大值和最小值與平均值的差值表示。

　　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.

　　耐溫試驗方法

　　Temperature resistance test method

　　將紙餐盒放在干燥的玻璃板上，分別注入95℃±5℃的食用油、水至距紙餐盒口部6 mm 處。蓋 上蓋靜置30 min 后觀察試樣有無變形、開裂，表面有無起皮、起皺現象，并觀察試樣底部和側面有無油 或水滲出或漏出。

　　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.

　　負重性能試驗方法

　　Load bearing performance test method

　　試驗設備

　　Test equipment

　　220mm×150mm×3mm的平板玻璃，3kg砝碼，準確度至1mm的金屬直尺。

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

　　試驗步驟

　　Test steps

　　將紙餐盒蓋打開倒扣在平滑的桌面上，再將平板玻璃放在盒底上。用金屬尺測定平板玻璃下表面至水平桌面的高度。然后將3 kg砝碼置于平板玻璃中央處，負重1min立即測定上述高度。分別測定2只紙餐盒，用式(1)計算每只試樣的負重性能。取2只紙餐盒測定值的算術平均值，作為該紙餐盒的負重性能。

　　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：

　　Where:

　　W  --負重性能，%;

　　W - Load bearing performance,%;

　　H? --試樣高度，單位為毫米(mm);

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

　　H  --試樣負重1min后的高度，單位為毫米(mm)。

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

　　標志、包裝要求

　　Marking and packaging requirements

　　紙餐盒的標志與包裝應按GB/T10342或合同的規定執行。

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

　　紙餐盒的所有包裝材料應具有足夠的密封性和牢固性，以保證紙餐盒在正常的運輸與貯存條件下 不受污染。紙餐盒包裝應防塵、防潮或防霉，直接與產品接觸的包裝材料應無毒、無害、清潔。

　　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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