Solid glue quality inspection report, QB T 2857 visual inspection, coatability, glue stick reset performance, non-volatile content, container sealing, cold resistance, mildew resistance.
1. Visual inspection.
First of all, a visual inspection is carried out in accordance with the QB T 2857 standard. The appearance should be neat and tidy, without obvious color difference, bubbles, impurities and damage. The surface of the glue stick should be smooth and flat, without obvious concave and convex, cracks and other phenomena. In addition, the length, diameter and other dimensions of the glue stick should be checked to see if they meet the requirements of the standard.
2. Paintability.
Next, the coatability test is carried out. Apply an appropriate amount of solid glue to the test paper to observe whether it is evenly coated and whether it can form a continuous adhesive film. At the same time, the drying time and adhesion after coating are checked to ensure that it meets the requirements of the standard.
3. Glue stick reset performance.
Reset performance refers to the performance of the glue stick to return to its original state after gluing. In this process, the glue stick is glued and peeled off several times to see if it can maintain good repositioning performance. The quality of the reset performance directly affects the service life and reusability of the solid glue.
Fourth, the content of non-volatile compounds.
The non-volatile content refers to the proportion of non-volatile components in the solid glue. In this link, the solid glue is heated by professional equipment, the quality difference before and after heating is measured, and the non-volatile content is calculated. The non-volatile content is one of the important indicators of the quality of solid glue, which affects the stickiness and durability of the glue stick.
5. Container tightness.
According to the requirements of the QB T 2857 standard, the tightness of the container is also an important part of the quality inspection of solid glue. Strict sealing performance tests are carried out on the container of solid glue to ensure that it has good sealing performance to prevent solid glue from moisture, deterioration and other problems.
6. Cold resistance.
Cold resistance refers to the performance of solid rubber in a low temperature environment. In this link, the solid glue is treated at low temperature to observe the changes in its appearance, viscosity and elasticity at low temperature. Cold resistance is one of the important indicators to measure the quality of solid glue, which affects its use effect in different environments.
7. Anti-mildew.
Finally, a mold resistance test is carried out. In this link, the solid glue is treated with mildew prevention to observe whether it has good mildew resistance. Anti-mildew is one of the important indicators to measure the quality of solid glue, which affects its hygiene and safety performance during use.
To sum up, the solid rubber quality inspection report needs to be tested in strict accordance with the QB T 2857 standard in terms of visual inspection, coating, glue stick reset performance, non-volatile content, container tightness, cold resistance and mildew resistance. Through the strict control of these test links, we can ensure that the quality of the solid glue meets the standard requirements, and provide users with safe and reliable adhesive solutions. At the same time, it also provides quality assurance for solid glue manufacturers and improves the market competitiveness of products.