In view of the problem of silicone penetration and overflow during the embossing process of knitted fabrics, the following are some effective solutions:
1. Choose the right silicone material
Viscosity selection: For knitted fabrics that are too thin, embossed silicone with higher viscosity and thicker thickness should be used to reduce the permeability of silicone.
Environmental considerations: Choosing environmentally friendly silicone is not only harmless to the human body and the environment, but also ensures good compatibility with knitted fabrics and reduces the risk of penetration and overflow.
2. Adjust the brushing process
Control the amount of brushing: Use appropriate brushing tools and methods, such as replacing a screen with a higher mesh count (such as changing from 100 mesh to 170 mesh or higher) to control the amount of silicone applied to the fabric to avoid excessive penetration and overflow.
Uniform brushing: Ensure that the silicone is evenly applied to the fabric to avoid partial over-thickness or over-thinness, thereby reducing the possibility of penetration and overflow.
3. Optimize the hot pressing process
Adjust the hot pressing temperature: Set the temperature of the hot press machine within an appropriate range. For example, the upper temperature of the fully automatic embossing machine can be set between 170℃-190℃, and the lower temperature can be appropriately lowered. Ensure that the silicone can cure quickly during the hot pressing process to reduce the risk of infiltration and overflow of glue.
Control the hot pressing time: According to the curing speed of the silicone and the thickness of the knitted fabric, set the hot pressing time reasonably. Avoid excessive flow and penetration of silicone due to too long hot pressing time.
4. Strengthen quality control and inspection
Strict quality inspection: During the production process, strengthen the quality inspection of knitted fabric embossing products, and promptly discover and deal with quality problems such as infiltration and overflow of glue.
Improve the production process: According to the quality inspection results, continuously optimize the production process to improve product quality and production efficiency.
5. Other precautions
Cleaning the fabric: Before applying silicone, ensure that the surface of the knitted fabric is clean and free of impurities such as oil, dust, etc., to reduce the poor combination between silicone and fabric and reduce the risk of infiltration and overflow of glue.
Storage conditions: Silicone should be stored in a cool and dry place, away from direct sunlight and high temperature environment to maintain its good performance and stability.
In summary, by selecting suitable silicone materials, adjusting the brushing process, optimizing the hot pressing molding process, strengthening quality control and testing, and paying attention to other related matters, the problem of silicone penetration and overflow during the embossing process of knitted fabrics can be effectively solved.