As a common packaging material, matte film is widely used in food packaging, book covers, labels and advertisements due to its unique matte effect, wear resistance and high-end texture. Next, this article will introduce the production process of matte film in detail, from raw material selection, production process to quality control, and comprehensively analyze its production process.
1. Selection of raw materials
Selection of substrates
Matte film substrates mainly include polyester (PET), polypropylene (PP) and polyethylene (PE). These base materials have good mechanical strength, chemical resistance and transparency, and are ideal for making matte film.
Coating materials
The realization of the matte effect mainly depends on the coating materials, commonly used coating materials include matte resin, matting agent and various additives. The matte resin has excellent light scattering effect, while the matting agent reduces the gloss by adjusting the surface roughness.
2. Production Process
Preparation of raw materials
Weigh and mix the base and coating materials according to the formula to ensure accurate proportions.
Substrate treatment
Before entering the coating process, the substrate needs to undergo cleaning, drying and surface treatment (such as corona treatment or plasma treatment) to improve the adhesion of the coating material.
Coating process
Coating is the core process of matte film production, commonly used coating methods are as follows:
(1) Solvent-based coating: Dissolve the coating material in an organic solvent, apply to the substrate, and dry to remove the solvent, leaving a uniform coating.
(2)Water-based coating: Use water as the dispersing medium, apply the coating material to the substrate, and dry to remove the water, forming a matte effect. This method is environmentally friendly and safe.
(3) Hot-melt coating: Heat and melt the coating material, apply it to the substrate, and let it cool to form the coating. This is ideal for high-temperature stability applications.
Drying and curing
Dry and cure the coated substrate to ensure even adhesion and the desired matte finish. Drying methods include hot air, infrared, and UV drying.
Cooling and shaping
After drying, the film needs to be cooled and shaped to ensure the flatness and dimensional stability of the film. Cooling methods include natural cooling and forced cooling.
Winding and cutting
After cooling and sizing, the matte film is wound into large rolls for subsequent processing and use. The large rolls are cut into the required specifications and sizes according to customer requirements.
3.Quality Control
Raw Material Inspection
Strict quality inspection is carried out on raw materials entering production, including thickness of base material, purity and viscosity of coating material, etc., to ensure that the raw materials meet the production standards.
Production process monitoring
During the production process, key parameters such as coating thickness, drying temperature, speed, etc. are monitored in real time by on-line testing equipment to ensure the stability and consistency of the production process.
Finished product inspection
Comprehensive quality inspection of the finished matte film, including appearance inspection, matte test, thickness measurement, tensile strength test, etc., to ensure that the product meets customer requirements and industry standards.
4.Application Examples
Food packaging
Matte film has a wide range of applications in food packaging, its excellent moisture, oil and freshness properties, making it the preferred material for high-grade food packaging.
Book cover
Matte film for book covers not only enhances the texture and grade of books, but also has the advantages of anti-fingerprint and anti-scratch.
labels and advertisements
Matte film is more and more widely used in the field of labels and advertisements. Its unique matte effect and excellent printing performance make it an ideal material for all kinds of labels and advertisements.
5.Conclusion
Matte film production process is a complex process involving a variety of technologies and materials. Through continuous technological innovation and process optimization, the quality and performance of matte film have been significantly improved.