Coating process

Coating process

Glass fiber fabric can be designed according to the needs of different organizational structure, plain, satin, twill, warp, weft, unidirectional fabric has good application in the coating process. Different coating processes, according to the performance requirements of the product.

Impregnating process
The coating material is made of low viscosity of the mortar, glass fiber fabric in the glue tank with the full infiltration of glue, after heat curing, then rewinding.

Diagram of impregnating process
Characteristics of impregnating process , glass fiber fabric and coating materials can be fully impregnated with colloidal glass fiber fabric with a close, good adhesion. The sealing and adhesion performance requirements of the product, the general use of this process.
Recommended to minimize the use of organic solvents in coating formulations.

The scarping coating process
The scarping coating process, which the coating colloid and the glass fiber fabric are coated together through the gap between the doctor blade and the coating roller. By adjusting the gap between the doctor blade and the coating roller, adjusting the shape and angle of the blade can adjust the coating amount and the apparent performance of the coated product, but also the coating material and glass fiber fabric adhesion. To overcome the glass fabric surface defects on the impact of coating products, it can also coat on the carrier at first, and then composite with the glass fiber ,take it into the tank, after high-temperature vulcanization, separate the carrier,the coating material is produced successfully.

Diagram of scarping coating process
The characteristics of scraping coating process, high production efficiency, uniform coating stability, it can be transferred through the coating method to give the product surface-specific performance (high light, matte, embossed, etc.). It’s the most widely used process.
For scraping process, using less solvent, and even without solvent. For double sides coating, coating for many times.

Calendering process
The coating material is calendered to form a sheet with a three-roll or four-roll
calender, composite with glass fiber fabric by pressing to form a single-side or double-side semi-finished coated fiberglass fabric products, vulcanizing by a drum vulcanizing machine, a plate vulcanizing machine or a vulcanizing tank.

Diagram of calendering process
The characteristics of calendering process, that apply to a large amount of coating products, the coating are hook. The pattern and finish of the product can be changed by changing the molds of the belt or flat vulcanizer of the drum vulcanizer.
The production process does not use solvents,it has no impact on the environment because of the low concentration. . Low cost of production materials. The apparent performance of the product is closer to the rubber, but the production efficiency is relatively low.

The composite process
Composite process is generally divided into non-adhesive composite process and adhesive compound process.
The non-adhesive compound process is a hot-press vulcanizing process for a semi-vulcanized coating material film and glass fiber fabric by hot pressing.
They adhesive composite process is to take the adhesive, the curing or semi-cured coating material film, the coated product is completed under the pressure bonding of roll.

Diagram of composite process
The characteristics of composite process, the coating weight is up to the film, product quality is stable, and production efficiency. By changing the surface of the roller to achieve the apparent quality of the product requirements.

Other processes
Single yarn coating process: First, coat the fiberglass yarn, and then weaving to form a fabric. The key of the technology is the coated yarn must be able to meet the weaving process requirements.
Spraying process, the coating material was made into gel, take the spray gun to spray the coating material on the surface of the fiberglass fabric,the product was made after vulcanization. It can be made into colorful and three-dimensional coating products.
Extrusion coating process, the coating material was uniformly extruded onto the surface of the glass fiber fabric with a screw extruder, the product was made after rolling, vulcanization. The efficiency is high, and it’s also a new trend.
According to product performance requirements, the above basic processes can be combined and improved to form a specific function of the production line.

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pdfThe technology and application of coated fiberglass fabric.pdf