PTFE coatings (polytetrafluoroethylene) are non-stick, fluoropolymer containing high temperature coatings, they have a single coating system or a double coating system of primer and top coat, and have a variety of properties. The Teflon spray process is an important surface treatment that gives objects outstanding properties. With the right preparation, spraying procedures and techniques, Teflon sprayed coatings of high quality can be achieved. So, do you know how Teflon paint is sprayed? What are the spraying methods of Teflon paint? What are the advantages of Teflon paint? Spray-Painted Method There are two main spraying methods for Teflon coatings: dispersion coating and powder coating. Dispersion coating The processing method of dispersion coating is a wet processing method in which the coating material is evenly distributed in the solvent to form a dispersion liquid (solid substance mixed in the liquid). This mixture is atomized by high-pressure air and sprayed on the surface of the workpiece. The specific spraying process is divided into several steps: preparation of workpiece - spraying of wet dispersion coating - drying - sintering. (1) Wet dispersion coating spraying: spraying coating materials must be uniform; And depending on the coating system used, the coating thickness can vary from a few microns to 200 microns. (2) Drying is to heat the wet coating in an oven at a temperature controlled below 100°C until most of the solvent has evaporated. (3) Sintering is to heat the workpiece to a higher temperature until an irreversible reaction occurs and the coating material melts with the bonding agent to form a network structure. Powder Coating The powder coating is a dry process in which the powder particles are attached to the workpiece and then the coated powder is melted in the oven. The coating material used here is in the form of small solid particles. The use of this coating method avoids the divergence phenomenon that occurs when the solvent is used and the subsequent coating is attached. The processing of powder coating is divided into the preparation of the workpiece - powder spraying - powder melting steps, among which, powder spraying refers to the powder particles blown out of the collector by compressed air, there is a section of electrostatic area on the way to the spray gun nozzle, the powder particles are attracted by the workpiece and attached to it. But no matter what kind of spraying method, one thing needs to be done first in the spraying process - the preparation of the workpiece, that is, in order to obtain sufficient surface adhesion of the workpiece surface, it is necessary to remove all the grease on the surface to be coated. We use organic solvents to dissolve oils and fats and heat them to about 400°C to completely volatilize them. Next, the mechanical way of sandblasting is used to clean the parts and make the surface rough, and the bonding ability of the coating and the surface of the workpiece ca...

Waterborne polyurethane (WPU) is a water-based dispersion material, and its unique low viscosity characteristics often bring construction challenges such as flow hanging and penetration. In order to solve these problems and improve its construction performance, self-leveling performance and storage stability, the addition of thickener has become a key step. The thickener not only endows the water-based polyurethane system with ideal thixotropy and suitable viscosity, but also meets the stability and performance requirements of its production, storage and use in many dimensions. In waterborne polyurethanes, thickeners play multiple roles: first, their associated thickening function can effectively enhance the stability of the system; Secondly, it can precisely control the rheological properties to ensure the smooth construction process; Finally, thickeners also help reduce the settling of pigments or fillers and maintain the uniformity of the paint. Due to the complex structure of water-based polyurethane association thickener, its thickening effect and viscosity performance are also significantly different. According to its characteristics, it can be roughly divided into two categories: pseudoplastic type and Newtonian type. Pseudoplastic thickener adsorbs on the surface of emulsion particles with strong hydrophobic base, which significantly improves the low shear and medium shear viscosity, and its main function is to thicken. The Newtonian thickener, while effectively increasing the viscosity, the improvement of low shear and medium shear viscosity is not obvious, therefore, through structural fine-tuning, this kind of thickener can also be used as a leveling agent. In practical applications, the association thickener selected by waterborne polyurethane mainly includes two categories: 1. Thickener suitable for medium and low shear rate: This kind of thickener gives the surface of waterborne polyurethane a weak pseudoplastic rheological property, making it more stable during construction. 2. Thickener suitable for high shear rate: its rheological curve is closer to Newtonian type, which mainly plays a role at high shear rate (about 10000/s). In order to obtain the best construction results and rheological properties, thickeners suitable for high shear rates and medium to low shear are usually used together. This can not only effectively reduce the flow phenomenon, but also minimize the amount of thickener, to achieve effective control of construction costs.

Paper ink absorption is not only related to the degree of porosity and capillary state of the paper, but also related to the surface properties of the paper fiber, the content of fillers, pigments, adhesives, ink composition and characteristics, printing methods, printing pressure and other factors. In actual printing, the absorption of ink by paper can be divided into two stages. The first stage is the printing press stamping moment, relying on the role of printing pressure to transfer part of the ink to the surface of the paper into the larger pores of the paper, that is, the ink as a whole (including the pigment in the ink) into the paper pores, this process is generally called pressure penetration stage. At this stage, the paper's absorption of ink mainly depends on factors such as the size of the printing pressure, the structure of the paper and the viscosity of the ink. If the printing pressure is large or the structure of the paper is loose, the absorption capacity of the paper to the ink will also be strong. In general, the printing structure of loose paper, such as newsprint, letterpress paper and other non-coated paper, the printing pressure should be smaller, the ink viscosity should also be lower. And paper with tight printing structure, such as coating paper, the printing pressure can be appropriately large, and the ink viscosity can be slightly higher. The second stage is from the paper to leave the imprint area until the ink is completely dry, this stage mainly relies on the capillary action of the paper to absorb the ink, called the free penetration stage. At this stage, the binder is separated from the ink as a whole and enters the inside of the paper at a fairly slow speed through small pores and the rough surface of the paper fibers. Therefore, this process is actually the process of migration of the binder from the ink to the pores of the paper, because the binder is separated from the ink as a whole, it will change the conjunctival nature of the ink film retained on the paper, and the fixation and drying of the ink stain will also be completed in this process. At this stage, the absorption rate of the paper to the ink determines the gloss of the print, and whether it will occur through printing, powder and other phenomena. When the ink is transferred to the paper, over time, the low molecular binder (solvent) will begin to penetrate into the paper layer, so that the solvent content in the ink layer on the paper will decrease, the ink viscosity will increase, and the ink layer will condense. The ink absorption of paper depends on the number of paper capillaries and the size of the capillary diameter. Paper is a porous material, and there are many gaps of varying sizes between fibers and fibers, between fibers and fillers, and between pigment particles inside the paper. These gaps are equivalent to many capillaries. Under the action of these capillaries, the binders in the ink can be absorbed, and the thicker the diameter of th...

Enhance the adhesion of UV ink and UV varnish on paper products! The tape won't come off Fast drying speed to meet the needs of production line Good affinity with UV varnish and UV ink Excellent strength and toughness Water-based UV base oil for high adhesion paper products Anhui Sinograce Chemical waterborne UV primer for high adhesion paper products is a high-performance waterborne coating developed by using the latest environmentally friendly coating technology, which is specially used to increase the printing effect of UV ink and UV varnish on paper substrates. UV curing glazing coatings and UV inks have been rapidly developed in recent years because of their environmental protection and excellent wear resistance and water and oil resistance. However, in the curing of UV photocurable coatings and UV inks, the internal components are cross-linked and polymerized, and the instantaneous change in volume produces a large internal stress, which affects the adhesion of UV ink and UV varnish to the substrate material. Anhui Sinograce Chemical Chemical Co., LTD. 's waterborne UV base oil for high adhesion paper products is a product specially designed for paper, for post printing or UV glazing using waterborne base oil products. Water-based UV base oil for high adhesion paper products is carefully formulated with special functional groups and wetting agents, which can effectively combine with polar groups on the surface of various paper substrates and quickly form a transparent film with high adhesion on the surface of the substrate. On the surface of the substrate with water-based UV primer for high adhesion paper products, UV varnish and UV ink can achieve the ideal adhesion effect, and will not be torn off with tape. In addition, water-based UV base oil for high-adhesion paper products also has the advantages of good film formation transparency and fast drying speed, which plays a role in promoting the development of environmental protection and efficiency in the printing industry. Product Use It is suitable for coating white cardstock, white cow card with grey background, kraft paper and copperplate smooth paper, and color printing UV primer. Product Feature Excellent adhesion, tape does not tear off: The polymer structure of water-based UV base oil for high-adhesion paper products from Anhui Sinograce Chemical contributes to the flow and wettability of molecular chains on the surface of the substrate, making the coating and the substrate molecules in close contact to achieve high adhesion. It won't come off with tape. Anhui Sinograce Chemical high adhesion paper products with water-based UV base oil can play an excellent role in post-sequence printing or UV glazing. Fast drying speed to meet the needs of production line: Anhui Sinograce Chemical high-adhesion paper products with water-based UV base oil drying speed, to meet the requirements of industrial production. Good affinity with UV varnish and ink: Anhui Sinograce Chemical high-adhesion pa...