Detailed explanation of the operation methods of shoe adhesives and primers

In the process of shoe manufacturing, the correct use of adhesives and primers directly affects the quality and durability of the finished product. Whether it is sports shoes, leather shoes or casual shoes, the process of adhesives and primers is crucial. This article will introduce the operation methods of shoe adhesives and primers in detail to help manufacturers optimize the production process.

Selection and preparation of adhesives

Shoe adhesives are usually divided into two types: solvent-based and water-based. When selecting, you need to consider material matching, drying speed and environmental protection requirements. Before operation, make sure that the adhesive is fully stirred to avoid precipitation affecting the bonding effect. If it is a two-component glue, it must be mixed strictly according to the proportion and used within the specified time.

Before applying glue, the surface of the shoe material must be clean and dry to avoid oil or dust affecting the bonding. A special cleaner can be used to treat the surface to ensure that the adhesive is in full contact with the substrate. When applying glue, it is recommended to spray or brush, and the coating thickness should be uniform to avoid too thick to cause incomplete drying or too thin to affect the bonding strength.

Primer application tips

Primer is mainly used to enhance the adhesion between the upper and the sole, while improving wear resistance and anti-aging performance. The choice of primer needs to be adjusted according to the type of shoe material (such as leather, synthetic leather or rubber). Before applying primer, make sure that the upper is completely dry to avoid residual moisture affecting the adhesion of the primer.

Primer coating can be sprayed or rolled, and the coating needs to evenly cover the upper, especially the seams and edges. After coating, it needs to be left to stand for a certain period of time, and the bonding process can be carried out after the primer is completely dry. Some primers need to be heated and cured. At this time, the temperature and time must be strictly controlled to avoid deformation of the shoe material caused by over-baking.

Bonding and curing process

After the glue is applied and the primer is dry, the upper and the sole need to be bonded immediately. Appropriate pressure needs to be applied during bonding to ensure that the adhesive is evenly distributed and to avoid bubbles or gaps that affect the bonding effect. After bonding, it needs to be cured under specific temperature and humidity conditions, usually taking several hours to 24 hours, depending on the type of adhesive.

After curing, the bonding strength needs to be checked and glue or trimming should be performed if necessary. Correct operation methods can not only improve production efficiency, but also ensure the long-term durability of footwear products. Mastering the key processes of adhesives and primers is the core link to improve the quality of footwear manufacturing.