Benzophenone is a colorless prismatic crystal with sweet taste and rose fragrance. It has a melting point of 47-49°C, a relative density of 1.1146, and a refractive index of 1.6077. It is soluble in organic solvents and monomers such as ethanol, ether and chloroform, but insoluble in water. Specification: Item           Specification             Appearance           White flake Purity              99.5%min Melting Point                  47.5-49.0 Low Boilers            0.1%max High Boilers            0.2%max Usage: Benzophenone is widely used as a photoinitiator for inks and varnishes that are cured with UV light. In addition to being a drying catalyst, benzophenone is an excellent wetting agent for pigments; it can also be used in printing to improve the rheological properties and increase the flow of inks by acting as a reactive solvent. Benzophenone can also be added to plastic packaging as a UV blocker to prevent photo-degradation of the packaging polymers or its contents. Its use allows manufacturers to package the product in clear glass or plastic (such as a PETE water bottle). Without it, opaque or dark packaging would be required.

Factors affecting fastness to adhesion as follows: 1. The influence of ink resin system Resin is an important part of the ink, its important role is first as a carrier of pigment, powder pigments, fillers and other solid substances mixed together, followed by making the ink on the substrate drying, consolidation film, resin system is one of the key components affecting the ink on the substrate adhesion fastness. For plastic packaging and printing of BOPP, PET, NY, etc are the main types of backing material, base material of different molecular structure is different also, in order to obtain good ink adhesion fastness, printing ink resins with the base material has good affinity, general printing production process of polypropylene (PP) film using chlorinated polypropylene resin type of ink, printing of polyester (PET) Film will use polyurethane ink, although now with the development of ink technology, suitable for BOPP, PET, NY and other substrates of universal ink has begun to use, but in actual use still need to effectively identify the type of ink, misuse of ink or ink from different manufacturers will cause poor quality accidents of ink adhesion fastness. 2. Influence of pigment dispersion Paint as a carrier of the ink color, mostly small molecule organic matter or inorganic matter, not directly with printed substrate to form effective adhesion, therefore can only put the pigment shattered into small, uniform particles, evenly distributed to the resin, resin on the surface of pigment wetting and package, so as to get a stable suspension system; The dispersion of pigments, in addition to directly affect the ink itself viscosity, gloss, stability, fineness, coloring power and covering power, ink adhesion also has a great impact. Good dispersion system, as well as to achieve the best pigment fineness also make the package more resin for small pigment particles in good condition, after fixation into a film in the plastic substrate surface, forming uniform package resin film pigment particles, increase the resin with plastic film on the surface of the contact area, to improve fastness. 3. Influence of solvent Solvent-based inks are mostly used in plastic gravure printing. As an essential organic solvent in the ink system, it also has a great impact on the fastness of ink to adhesion on the surface of plastic substrate. 1) The solvent volatilization of printing ink affects the fastness of printing ink Production needs to adapt ink to printing, printing ink resin's ability to release organic solvent and solvent volatilization speed directly affect the ink attachment fastness, volatile solvent good its solvent release better than the volatile solvent with a slower, but the high proportion of high volatile solvent will lead to ink surface drying too quickly, and the inner solvent release impeded, dry incomplete, in actual life In the process of production, it is necessary to add an appropriate amount of slow drying solvent or medium slow drying solven...

Vinyl Resin is mainly used for application printing inks or coating. Hereby we would like to introduce the production method for your reference as follows; The production method of the Vinyl Resin is similar to the polyvinyl chloride homopolymer resin, and the selected initiator and dispersant system are basically the same, except that a monomer such as vinyl acetate is added. However, there are the following differences in production operations: 1. In the production process of Chemical Resistance Vinyl Resin, the reactivity ratio earlier than vinyl chloride is larger than that of vinyl acetate. In order to obtain copolymers of chloroacetic acid, the chloroacetic resin obtained by adding vinyl chloride in multiple steps is more than one feeding method. The resin obtained is much better. Because the content of vinyl acetate in the different polymerization stages of the former is more uniform than the latter. Colleagues have a higher price of vinyl acetate than vinyl chloride. The use of batchwise vinyl chloride helps reduce the amount of vinyl acetate, which can reduce the cost of resin production. 2. The particle characteristics of Vinyl Resin directly affect the quality of the product, especially ink production. Poor particle properties can lead to insoluble problems in the production process, and there is a thickening phenomenon when the product is placed for a certain period of time, which affects the performance. Therefore, a suitable dispersant is used to improve the solubility of the chloroacetate resin and improve the chloroacetate resin. Porosity and control of the particle size of the copolymer resin. 3. To control the molecular weight, vinyl acetate content and molecular weight distribution of the chloroacetic copolymer resin to improve the processing denaturation of the copolymer resin. Firstly, the polymerization temperature is controlled, and the polymerization temperature is kept stable. The ratio of vinyl acetate and vinyl chloride to be added is controlled, and the ratio in the polymerization process is relatively constant as much as possible to obtain a product having a uniform copolymerized resin containing vinyl acetate. Secondly, it is necessary to control the chain transfer between the active chain end and the monomer. For the copolymerization system, compared with the presence of vinyl acetate, the polymer has a high chain transfer coefficient from the end to the monomer, thereby lowering the molecular weight of the resin. And there is an increase in the impact of vinyl acetate. In addition, there is an increase in the influence of vinyl acetate. If your need more informations about vinyl resin, pls let us know.

Is the merchandise printed with UV ink not shiny and bright enough? A million bad exercises, mild curing isn't thorough, the appearance of sticky? Don't worry, these questions are clearly stated at one time now, so you can use them after reading them! A. The gloss is not good and the brightness is not enough. The key reasons are as follows:  (1) the viscosity of UV ink is too little and the coating is too thin;  (2) excessive dilution of non-reactive solvents such as ethanol; (3) irregular coating of UV ink;  (4) powerful absorption of paper;  (5) too thin display roller, absence of petroleum provide nourishment method: In accordance with the different states of paper, the viscosity and coating amount of UV ink ought to be suitably enhanced. A coating of base oil can be coated on paper using strong absorption. B. Poor performance, pristine light curing and tacky Look The key reasons are:  (1) insufficient ultraviolet light intensity;  (2) aging and weakening of ultraviolet lamp tube;  (3) long storage time of ultraviolet ink;  (4) excessive involvement of diluents which don't participate in the reaction;  (5) excessive speed of this machine. C. There are white spots and pinholes in the published matter. Can also participate in a small quantity of smoothing aids. The busy diluent that engages in the response is the ideal choice for dilution.