纸护角的外观检测要求主要就是要求表面质量及切割边质量等没有明显缺陷，印刷图案清晰准确。尺寸偏差测定主要检测纸护角的场地、边宽、厚度。翘曲度检测指标要求不得大于15mm/m。角度检测指标要求外角角度都在90°，而且偏差在±5°，异型纸护角可协商制定。纸护角的含水率要求应该为14%,偏差范围应该在±4%。
The appearance inspection of paper corner guard mainly requires that there are no obvious defects in surface quality and cutting edge quality, and the printing pattern is clear and accurate. The size deviation measurement mainly detects the site, side width and thickness of paper corner guard. The warpage detection index shall not be greater than 15mm / m. The angle detection index requires that the external angle angle is 90 ° and the deviation is ± 5 ° and the angle guard of profiled paper can be formulated through negotiation. The moisture content of paper corner guard should be 14%, and the deviation range should be ± 4%.
一文读懂纸护角检测的相关知识
Read and understand the paper corner guard detection related knowledge
抗压性能和抗弯性能可谓是纸护角质量检测中为关键的两个性能。抗压性能上主要是检测纸护角的纵向抗压力，具体分级要求是根据纸护角的边宽和厚度来规定的。抗弯性能主要是检测其抗弯力，也是以边宽和厚度来分级的。值得注意的是BB/T 0023-2017只是规定了L型纸护角的抗压性能和抗弯性能的分级要求。对于U型纸护角、异型纸护角的抗压性能和抗弯性能，可由供需双方自主协商制定。下面我们将两个性能检测试样的方法为大家介绍一些。
Compression and bending properties are the two most important properties in the quality inspection of paper corner guards. In terms of compression performance, it mainly tests the longitudinal pressure resistance of paper corner guard, and the specific grading requirements are specified according to the edge width and thickness of paper corner guard. The bending performance is mainly to test the bending force, and it is also graded according to the side width and thickness. It should be noted that BB / T 0023-2017 only specifies the grading requirements for compression and bending properties of L-type paper corner guards. The compressive and bending properties of U-shaped paper corner guards and profiled paper corner protectors can be determined by the supplier and the demander through independent consultation. Next, we will introduce the methods of two performance test samples for you.
纵向抗压试验：从纸护角的任意部位截取试样5根，试样要求端面平整、无磨损，且与侧面垂直。将试样垂直放置于纸护角强度测定仪的两压板，动压板以一定的速度对试样施压直压溃，记录压溃时的抗压大值。取5根试样的平均值。
Longitudinal compression test: 5 samples are cut from any part of paper corner guard. The end face of the sample is required to be flat, free of abrasion and perpendicular to the side. Place the specimen vertically in the center of the two pressing plates of the paper corner guard strength tester. The dynamic pressing plate presses the sample at a certain speed until it collapses, and records the maximum compressive value during crushing. Take the average value of 5 samples.
抗弯试验：从纸护角的任意部位截取试样5根，将试样放置在抗压试验支架上，中间用一个呈90°加载头，加载头放在试样的中间部位。加载头以一定的速度对试样施压，记录压溃时的大值。取5根试样的平均值。
Bending test: five specimens are cut from any part of the paper corner guard, and the specimens are placed on the compression test bracket, and a 90 ° loading head is used in the middle of the specimen. The loading head presses the specimen at a certain speed and records the maximum value of crushing. Take the average value of 5 samples.
一文读懂纸护角检测的相关知识
Read and understand the paper corner guard detection related knowledge
总结来讲，纸护角在包装材料产品，属于定位清晰的产品。对于包装纸箱能够形成很好的保护作用。尤其是在预防包装运输中外部损耗，增加纸箱的叠放压力和强度，将包装货物打包成一个加固而稳定的包装整体，对其包装物件的表面和边角形成有效的防护等等方面，都有起着重要的作用。
In conclusion, the paper corner guard is a product with clear positioning in the packaging material products. For the packaging carton can form a good protective effect. In particular, it plays an important role in the prevention of external losses in packaging and transportation, increasing the stacking pressure and strength of cartons, packaging the packaged goods into a reinforced and stable package as a whole, and effectively protecting the surface and corners of the packaging objects.
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