The processes of coating and laminating both are two of the most widely used processes for transforming flexible films and sheets in products. The process of coating is applying one or more fluid layers to the material surface, however, the process of laminating is the bonding of two or more webs. These both have become more important enhancement techniques to add performance and textiles aesthetic values. For instance, paper cup coating laminating machine is famous in the textile industries now. The machine has characteristics of easy operation, low investment, easy maintenance, minimum costa, and cheap operating cost.
The process of dry laminating comprises two or more flexible backing material strips using an adhesive dissolves in a solvent. This is also called complexing if an adhesive tape is used. The strips of flexible backing materials are made from film paper or aluminum foil. To produce an ultra-strong lamination, the adhesive solvent is applied to the least absorbent strip. Then it is bounded to the second strip by the higher pressure exerted by cylinder, here heat is necessary. The laminating comprises two layers named duplex, three layers called triplex, and more.
The techniques of lamination improve the properties and appearance of the backing materials. The adhesive selected type is dictated primarily by the end-use of the product. Different technologies can be implemented like flat laminating, laminating by calendaring, Holtmelt laminating, etc. to cover many applications that are possible. The laminated products can be shaped as trips wound or as log rolls on the reel as per the requirement of customers. The material may be purchased by ADDEV materials or supplied by the buyer as required.
Dry phase lamination:
- Adhesive application
- Solvents evaporation
- Solvent-based and water-based adhesive
- Adhesive lamination-coated film to the second film.
This is a surface treatment that includes applying a liquid coating like lacquer, adhesive, oil, paint, etc. to a backing material such as fabrics, paper, plastic film, metal foil, etc. This is to give specific advantageous properties for the specific application. The process of coating is followed by drying and by cross-linking, if necessary.
The extrusion coating, before practices in the production of LDPE-coated paperboard for cartons of milk as the replacement of wax-coated stock on a commercial scale. If you compare both coatings, the LDPE is better because of its greater strength. The seal integrity and cracking and flaking off resistance of LDPE is superior. Moreover, it provides greater moisture resistance. Presently, all the applications for was coated paperboard are replaced by polyolefin-coated board and paper.
For the coating operations, ADDEV materials use engraved cylinders. Then cylinders transfer the adhesive to the film, later then fed into a drying oven in which solvents evaporated way.
Affected the thickness:
There are different variables which affect the liquid thickness on the substrate:
- Liquid viscosity
- Surface tension
- Substrate feed speed
- Liquid density
- The angle between the surface of the bath and substrate