Paper edge corner protector cutting machine When customizing L-shaped paper corner protectors, the quality inspection standards usually cover multiple aspects such as appearance, size, and physical properties:
Appearance standard
Paper edge corner protector cutting machine Surface flatness:Paper edge corner protector cutting machine The surface of the paper corner protector should be flat and smooth, without obvious defects such as bumps, wrinkles, bubbles or indentations, so as not to affect its aesthetics and performance.
Paper edge corner protector cutting machine Color uniformity: Paper edge corner protector cutting machine The overall color should be uniform and consistent, without obvious color difference. The color deviation of the paper corner protectors in the same batch should be within an acceptable range to ensure good visual effects.
Cleanliness: The surface should be clean and tidy, without dust, stains, oil stains or other impurities attached to avoid contamination of the protected items.
Paper edge corner protector cutting machine Edge integrity: The edges of the paper corner protectors should be neat, without burrs, tears or damage, to prevent scratches on operators or protected objects during use.
Dimension standard
Side length: The two side lengths of the L-shaped paper corner protectors should meet the design requirements, and the allowable tolerance range is generally ±1mm to ±2mm, depending on the product specifications and usage requirements.
Paper corner protector/corner protector Length dimension: Paper corner protector/corner protector The length tolerance of the paper corner protector is usually controlled at ±2mm to ±5mm. For longer paper corner protectors, the tolerance range may be appropriately relaxed, but it should also be within a reasonable range.
Thickness dimension: The thickness should be uniform, and the tolerance range is generally ±0.5mm to ±1mm to ensure the strength and cushioning performance of the paper corner protector.
Paper corner protector/corner protector Physical performance standard
Paper corner protector/corner protector Compressive strength:Paper corner protector/corner protector According to the specifications and uses of the paper corner protector, its compressive strength should meet the corresponding standards. Generally speaking, the compressive strength of small paper corner protectors should not be less than 500N, the compressive strength of medium-sized paper corner protectors should be between 1000N and 2000N, and the compressive strength of large paper corner protectors should be higher, usually not less than 3000N.
Tear strength: Tear strength reflects the ability of the paper corner protector to resist tearing. Generally, the longitudinal tear strength is required to be not less than 20N and the transverse tear strength is not less than 15N.
Paper corner protector/corner protectorWater resistance:Tray corner/paper corner protector/PVC corner For paper corner protectors with waterproof requirements, water resistance tests are required. Usually, an immersion test is used to immerse the paper corner protector in water for a certain period of time to observe whether it is deformed, delaminated, or has a decrease in strength. It is generally required that the strength retention rate of the paper corner protector should not be less than 80% after immersion at room temperature for 24 hours.
Tray corner/paper corner protector/PVC corner Bending performance:Tray corner/paper corner protector/PVC corner The paper corner protector should have a certain degree of flexibility and should not crack or break when bent. It is generally required that the paper corner protector can remain intact without obvious cracks at a certain bending angle and number of times.
