Composite film manufacturer there are bubbles and spots in the composite film, what is the cause? There are many factors in this kind of situation, and the actual situation needs to be analyzed in detail. The basic elements commonly used to produce bubbles and spots are: 1, environmental factors such as dust and suspended matter interference, which requires a good environmental health area environment); If there is a suspended substance in other adhesives, it is necessary to identify whether it is carried by the adhesive itself or with a plastic bucket; 2.The equipped adhesive is doped with water, which is not dried at the ambient temperature of 60 ~ 90 degrees in the drying channel, and reacts with the curing agent to produce CO2 bubble and white crystal point after chemical crosslinking, and there are two kinds of gas bubble and water vapor bubble in the composite film; 3.the ambient humidity in the working area environment is too large, the water in the air adheres to the plastic surface, especially the plastic surface with large hygroscopicity, such as nylon, cellophane and other easy crystal points; 4.When the adhesive is equipped, the concentration is too thin, the amount of glue is short, the amount of glue is short, the mesh roll is blocked, and other factors are composed of regular spots or bubbles. 5.the film quality is poor, that is, the surface tension of the base film is too poor, the composition of the adhesive is poor, and there is no glue where the bubble is generated; 6.During the coating, the Angle of the scraper and the fluctuation of the adhesive are relatively large, and the impact of the bubble is generated. When the composite machine is working quickly, the bubble can not be immediately subsided, resulting in a lot of bubbles in the rubber tray, which are then engrafted and transferred to the film (the viscosity of the adhesive is too high, and the bubble will be generated); 7.The coating pressure is short, the outer temperature of the coating roller is too low, the adhesive activation is short, and the circulation is small, so that the open space between the adhesive dot and the dot can not be filled, and there is a thin open space to form a bubble; 8.Adhesive product quality problem 9.The interference of water and alcohol in the coating glue manufacturer,should be avoided as much as possible during coating Sinograce Chemical produces all kinds of paper film composite glue, dry composite glue, welcome customers to buy

First, the print composite bond is poor 1.Check whether the printed matter itself belongs to special paper; 2.Whether the printing ink is caused by excessive auxiliary materials or special ink; 3.Small amount of glue; 4.Low temperature or small pressure of hot press roller; 5.BOPP membrane corona is processed Second, the brightness of printed matter is poor after composite 1.Printed matter itself, paper, ink; 2.When composite, the temperature of the hot press roller is low; 3.Less colloidal water; 4.Large amount of powder spray; 5.Too little pressure Three, composite products have flower points 1.Uniform strip causes: uneven coating of the roller, cleaning of the scraper is not clean, glue particles or impurities, filtered and then used; 2.When the roller is out of round and unbalanced, the glue is uneven or wavy. 3.Uniform into a ripple: the speed of the rubber roller is too slow or too fast; 4.Uneven flower point: there are stolen goods on the glue roller, there are stolen goods on the surface of the pressing roller, and the glue evenly controls the speed above the glue Fourth, the composite product foaming 1.Printing spray quantity is large, additives are too heavy; 2.Pressing roller temperature is too high; 3.Too much glue water drying or too little glue water; Five, paper wrinkles 1.Whether the printed product is damp and deformed; 2.Whether the cold roller is balanced; 3.Whether the amount of glue is too large; 4.Whether the pressing roll is deformed; 5.Heating roller temperature is too high; 6.Printing ink is not dry; Six, slow speed 1.Large amount of glue, thick glue layer; 2.Drying and heating, low roll temperature; 3.Large amount of ink layer and powder spray; 4.Low glue grade should be upgraded;

As we all know, printed laminating is one of the surface decoration processing technology of printed matter, which is the auxiliary process of printing. It is the plastic film bonded together with the printed matter through the adhesive to improve the surface gloss, strength and aesthetic effect of the printed matter, so as to make it water resistant and wear resistant, which is an effective means to improve the grade and commodity value of the printed matter. So measure the quality of laminating, but also mainly from the brightness of the product, strength, adhesion and other aspects to examine. For the laminating process, it mainly uses film and adhesive two types of materials. The film used for film covering mainly has bidirectional stretching propylene film (BOPP), polyvinyl chloride (PVC), etc., among which BOPP film is the most widely used. The adhesive used in film coating can be divided into oily film coating adhesive and water-soluble film coating adhesive. For water-based glue, the most commonly used in the production of EVA resin (ethylene vinyl acetate copolymer resin), acrylic resin, etc. In terms of its chemical structure, there are single components, there are two components. Since the development of water-based film laminating machine in the 1990s, water-based film laminating process has been vigorously promoted and applied. Water-based film laminating is favored by customers for its high brightness, high grade, easy recycling and no pollution. Since its establishment, Anhui Sinograce Chemical Co., Ltd., has produced many water-based lamp-coated adhesives to meet the needs of customers in various applications, such as wine cases, wine boxes, wine labels, handbags, posters, etc. In this issue, we discuss the water-based film coating process with you in the following aspects: ①Printing powder Because the water-based glue can dissolve the surface of the printing products, so when the coated products appear snowflakes, it is incomprehensible. In fact, the reason is very simple, the water-based glue itself will also be limited by solubility. When the amount of powder sprayed on the printed matter is greater than the dissolving capacity of the glue, the excess part cannot be dissolved or covered by the glue, and a large number of snowflakes will appear. In this case, there are the following solutions: 1.One,Coordinate the upper and lower processes to minimize the amount of powder spraying during printing. Because the powder spraying device and mechanism are not the same, so we are equipped with different production equipment to ensure the quality of products. 2.Two, in the film, the appropriate increase in the amount of glue, increase the ability of glue to dissolve powder. In the actual production, the maximum value of hanging glue is the maximum amount of hanging glue when the edge of the product does not overflow. 3.Three, before the coating will be printed surface suspension powder cleaning, can be taken to wipe the surface by hand,...

With the rapid development of printing and packaging industry, the appearance design of products is becoming more and more high-end. The composite technology used in modern exquisite printing mainly includes: paper printing and plastic film composite and plastic printing and plastic film composite, that is, paper-plastic composite and plastic-plastic composite.As a new type of packaging material, paper paste plastic film has been widely used in book covers, calendars, gift packaging and wine boxes, advertising materials, cards, food packaging and so on, so that the printed matter is beautiful, bright, waterproof and antifouling, to improve the product grade play a beautification and decoration role, so it is widely used by the packaging industry and printing products industry. Laminating glue refers to a kind of glue that combines the film on the paper. Paper-plastic composite is the use of adhesive polypropylene or polyester film and paper printed matter composite together, combined with the advantages of paper and plastic film, so as to make the surface of the printed matter more bright and smooth, make the color more bright and rich three-dimensional sense, but also play a moisture-proof, anti-fouling, anti-counterfeiting, folding and wear-resistant and other functions. Widely used in decorative building materials, packaging materials, hardcover books, product advertising or specifications. With the development of market economy and the improvement of consumption level, film coating is quite extensive. The adhesive used in paper plastic composite is called paper plastic composite adhesive, referred to as paper plastic laminating adhesive.The existing laminating adhesive light transmittance is low, resulting in low appearance brightness, affecting the appearance. The oily laminating adhesive belongs to the single component laminating adhesive, which has the characteristics of fine colloid, high light transmittance, strong adhesion, wide range of application, etc. The paper coated by the technology has high brightness and intensity; The preparation method is a physical process at normal temperature and pressure to reduce production costs. Contact Information Mobile Phone/wechat:+8615755193346 Telephone:+86 0551 63459511