Dry sandpaper plays a pivotal role in various industries, especially in tasks requiring precision and finesse. However, the quality of dry sandpaper can sometimes be compromised in the manufacturing process due to a variety of factors. In this article, we will thoroughly explore the causes behind the wastage during dry sandpaper production and discuss effective prevention methods.
1. Coarse Grains
Causes:
– Presence of large particles in the abrasive.
– Inadequate cleaning of the sand container and abrasive transportation devices.
Prevention:
– Store abrasives according to their particle size.
– Ensure thorough cleaning of residual abrasive.
2. Aggregation of Abrasive Material
Causes:
– Impurities and cotton debris on the cotton fabric.
– Impurities in the adhesive.
– Undissolved adhesive particles.
– Aggregation of abrasive material due to moisture.
– Excessive thickness of the base adhesive.
Prevention:
– Improve the quality of cotton fabric.
– Sieve the adhesive solution.
– Ensure abrasives are thoroughly dry.
– Maintain the appropriate thickness of the base adhesive.
3. Starch Stains
Causes:
– Impurities in the starch solution, undissolved particles.
– Formation of starch skin.
Prevention:
– Control the quality of raw materials and starch solution.
– Use a cold starch solution.
4. Edge Curling
Causes:
– Tight edges of the fabric.
– Excessive tension.
– Uneven drying.
Prevention:
– Enhance the quality of cotton fabric.
– Ensure uniform tension.
– Control drying temperature and humidity.
5. Adhesive Stains
Causes:
– Impurities in the adhesive.
– Incomplete dissolution of the adhesive.
– Uneven adhesive application.
Prevention:
– Improve the quality of the adhesive.
– Pay attention to adhesive temperature and thickness during application.
6. Insufficient Abrasive
Causes:
– Insufficient adhesive.
– Starch stains.
– Collision damage.
– Cotton debris or broken yarn.
– Insufficient application of abrasive.
– Adhesive roller and scraper contaminated with foreign substances.
Prevention:
– Improve the quality of cotton fabric.
– Avoid starch stains.
– Keep adhesive roller and scraper clean.
– Ensure even and adequate application of abrasive.
7. Adhesive Edges on the Back
Causes:
– Misalignment of the substrate during adhesive application.
Prevention:
– Ensure straight movement of the substrate.
8. Wrinkling
Causes:
– Fabric joints not aligned.
– Uneven tension.
– Uneven pressure from the calendar.
– Uneven drying.
– Inconsistent winding tension.
Prevention:
– Align fabric joints properly.
– Maintain even tension.
– Apply uniform pressure.
– Ensure even and appropriate drying.
– Wind the fabric tightly and neatly.
9. Adhesive Penetration
Causes:
– Thin starch application.
– Dilute starch solution.
– Insufficient drying after starch application.
– Thin fabric.
– Low viscosity of the base adhesive.
Prevention:
– Control the quality of starch application and starch solution.
– Enhance the quality of cotton fabric.
– Maintain moderate viscosity of the base adhesive.
– Reduce speed appropriately.
10. Irregular Patterns
Causes:
– Uneven application of abrasive.
– Inadequate pre-drying, leading to severe abrasive loss during winding or double adhesion.
– Uneven adhesive application.
Prevention:
– Apply abrasive evenly and ensure the spreading roller is clean.
– Ensure proper pre-drying.
– Apply adhesive with uniform and moderate thickness.
By understanding these causes and implementing effective prevention methods, manufacturers can significantly reduce waste in dry sandpaper production, resulting in higher-quality products.
+86 18503711019 
Call