PurinAdhe - Textile Lamination
Lamination process, which is one of the most important applications in the textile industry, is the most critical quality element of the final product. For this quality, superior adhesion strength and washing resistance are the two priority parameters required in lamination processes.
Lamination types in textile are as follows;
Flame lamination: It is made by making use of the adhesion property of polyurethane sponge by applying flame.
Film lamination: It is used to make the film between two fabrics sticky with heat.
Melt Glue: Reactive PU, known as Hot Melt, is the adhesive that results from the reaction of the prepolymer with moisture after the first holding with rapid physical change.
Solvent-based adhesive: Reactive PU dissolved in solvent (it is the solvent version of the Hot melt system) provides adhesion after the solvent is removed and the solid material reacts with moisture.
Water-based adhesive: They are polymer materials containing water. This is the method in which the polymer components provide adhesion with the removal of water after the application. These polymers in water may be PVA, latex or polyurethane.
Water-based adhesives such as flame lamination, PVA and latex do not provide sufficient product quality. Especially with PVA and Latex type applications, disposable products such as slippers are made. Both adhesion and washing resistance of these products are not very good. Therefore, disposable products are preferred in terms of cost. Solvent-based glue lamination and Hot Melt Lamination are the same in terms of polymer structure, both are reactive polyurethane. The difference between them is that the Hot Melt product does not contain solvent, so it is in solid form under normal conditions. Lamination process is done by melting at temperatures such as 110-160°C. Solvent-based glue lamination product is also reactive polyurethane, but it is in liquid form under normal conditions due to the solvent it contains and the lamination process is done without any heating process.
The reactive groups in these structures react with the moisture in the air and complete the polymer structure, which indicates that the product is dry. Adhesion in Hot Melt products is not due to the drying of the product, but due to its structure that turns into solid.
The product, which is in molten state due to temperature, cools down with environmental conditions when heat is not applied, which allows the product to pass from liquid form to solid form. Both Hot Melt glues and solvent-based glues react with humidity in a certain time depending on the ambient temperature.
The main difference during application is the pre-holding properties. While Hot Melt adhesives provide this with a physical form change, as we mentioned above, this feature is provided by the high molecular weight of the formulation in solvent-based products.
Solvent-based adhesives are not sustainable due to fire risks, human and environmental damage, and Hot melt systems are not sustainable in terms of high machine investment and high energy costs. Other laminations do not always meet the demands in terms of performance.
As PURIN, we are pleased to present our new technology water-based polyurethanes with the following advantages to the sector;
- Eliminates fire, health and environmental risks.
- Almost zero machine and energy costs.
- Providing high performance.
Our product is in the form of polyurethane resin dissolved in water. Therefore, for optimum adhesion performance from the product, it should be applied with the following steps;
• Water-based polyurethane glue is applied to the relevant surface (textile or other materials) in a certain amount by spray, roller or doctor blade method.
• By passing the glued surface through an oven, the water in the glue is removed and the polyurethane resin dissolved in the water is revealed.
• The resulting polyurethane resin will be in a soft and sticky form due to the temperature. The second material to be laminated is applied with the help of a roller.
• Then, the materials that are laminated to each other are passed through the cooling rollers, and the polyurethane resin is cooled to a form that will show its original performance.
The important advantages of our PUD adhesive products are as follows;
• Since the product contains water, it is classified as an environmentally friendly product.
• Being a high performance product since the resin in question is polyurethane.
• High adhesion strength (adhesion to all kinds of surfaces with necessary modification)
• Washing resistance.
• High elasticity.
• High chemical resistance.
• High hydrolysis resistance.
• Ease of implementation; obtaining a high performance product at very low viscosity. Hence the ease of use of the low viscosity product.
• Viscosity possibility that can be adjusted for all kinds of applications.
Please contact us for all your lamination needs. Our team will offer you the most suitable product.