Broad prospects of printing water-soluble bags

by:POLYVA     2021-09-18
u003cpu003ePVA water-soluble film: At present, the water-soluble film is mainly produced by the wet method. The raw material of polyvinyl alcohol is dissolved in water with an appropriate amount of additives, and then it is adjusted into a paste and coated on the surface of the equipment mold and dried into a film. , Low production efficiency, narrow product application range, high comprehensive cost and poor economic efficiency. However, P-PVA is directly manufactured into a film by thermoplastic processing with the existing film blowing equipment, commonly known as the dry method. The water-soluble film produced by this method has low energy consumption, high production efficiency, wide product application range, low comprehensive cost, and significant economic benefits. It is a new film-making material with great development prospects. According to the market demand for water-soluble films for PVA packaging, there are three types: u003cbr /u003edissolved. u003cbr /u003e  (2), slow-dissolving type (XQ-H series) resin, printing water-soluble bag adjusts the degree of alcoholysis and polymerization, after film formation, the water-soluble speed is slowed down, and the water-soluble temperature is appropriately increased, which makes the product application Expand further. u003cbr /u003e  (3), high-temperature water-soluble (XQ-G series) resin, which adjusts the processing method to make it insoluble in water at room temperature after film formation, but can be dissolved in water above 55℃. The product can avoid moisture absorption or swelling when used in a normal temperature and humid environment, and can be used in more packaging fields. u003cbr /u003e   Water-soluble film has a wide range of uses, a very broad market, and has environmental protection characteristics, so it has been widely valued by developed countries in the world. For example, Japan, the United States, and France have mass-produced and sold such products. Its users are also some well-known large companies, such as Bayet (Bayer), Henkel (Henkel), Shell (Shell), Agr.Eva (Aegfor) and other large companies have begun to use water-soluble film to package their products. u003cbr /u003e   In the domestic market, the water-soluble film market is emerging. As far as the domestic market is concerned, according to relevant statistics, the packaging film is currently required to account for 20% of plastic products each year, or about 309,000 tons, even if it accounts for 5% of the market. , The annual demand has reached 15,000 tons. The main applications of printed water-soluble bags are as follows:u003cbr /u003e   is used in the packaging of products used in water, such as pesticides, fertilizers, pigments, dyes, detergents, water treatment agents, mineral additives, detergents, concrete additives, photography Use chemical reagents and gardening care chemical reagents, etc.; water transfer printing, used for trademark and pattern transfer of special-shaped surfaces of ceramics and electrical appliances; high-temperature water-soluble film (insoluble below 40°C), can be used for clothing and textile packaging, food preservation film Etc., especially the packaging of export products; used for seed bags, agricultural seedlings, embroidery, etc. u003cbr /u003e   In addition, the main raw material of water-soluble film is polyvinyl alcohol. my country is a major producer of raw materials. This is extremely beneficial to the market development of the application prospects of water-soluble packaging film. With the development and progress of society, people are increasingly The more attention we pay to maintaining the environment on which we live, especially as our country is about to integrate with internationally developed countries, the requirements for packaging environmental protection are increasing, so the application prospects of water-soluble films in our country must be very broad. u003cbr /u003e  As a new type of green packaging material, water-soluble packaging film has just begun its research and application in China, and it has only 15 years of development history abroad, so there are many topics to be researched and developed, specifically as follows:u003c br /u003e  1. Research on quality control methods of water-soluble film productionu003cbr /u003e   Due to the unique production process of water-soluble film, various defects will occur in the production. Printing water-soluble bags such as bubbles, uneven thickness, thick edges, 'fish The causes of 'eyes\u003cbr /u003e  2. Research on the influence of each component on the water-soluble packaging film and the mechanism of action. The various physical and chemical properties of the water-soluble film are the result of the comprehensive action of its components. In-depth study and discussion of the water solubility of each component The influence and mechanism of packaging film are of great significance for improving the quality of water-soluble film production, meeting user requirements and developing new water-soluble films. u003cbr /u003e  3. Improvement and improvement of the productivity of water-soluble membranesu003cbr /u003e   At present, the production speed of the developed water-soluble membrane production equipment is 4 to 5 meters per minute, and the production speed of similar foreign equipment is about 7 meters per minute. Compared with water-soluble membrane equipment, the productivity is obviously very low, which is an important reason for the higher cost of water-soluble membrane. How to improve the productivity of water-soluble membranes will be an important research topic in the future. u003cbr /u003e   4. The development of new water-soluble membranes and the development of new water-soluble membrane applications. Although water-soluble membranes have been widely used, with the development of production and social progress, human needs continue to grow. The field needs to be explored, and various new water-soluble membranes need to be developed. For example, the power industry uses heat-resistant (300°C) water-soluble films for welding auxiliary materials to replace water-soluble paper, and the washing industry develops water-soluble films with washing functions to be used as film soaps. u003cbr /u003eu003c/pu003e
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