• Laminating film common problems and treatment methods
    Laminating film common problems and treatment methods


    There are many factors affecting the quality of the film, in addition to paper, ink layer, film, adhesive and so on In addition to the objective factors, it is also affected by subjective factors such as temperature, pressure, speed, and glue amount. If these factors are not handled well, various laminating quality problems will occur. There are snowflakes on the product 1.The amount of glue is too small: the amount of glue is too small, and snow spots will appear on the entire surface of the print. The amount of glue can be appropriately increased. 2.Inappropriate pressure: too much pressure on the pressure wheel will squeeze out the adhesive on the edge of the print, resulting in snowflake spots on the edge of the print; Snowflake spots can also appear if it is not compacted. The pressure can be adjusted appropriately. 3.Print powder spraying too much: print powder spraying too much, the compound appears loose pine flower white fog, encounter this situation, should be appropriate to increase the amount of glue, or in the coating before sweeping the print powder. The product has bubbles. 1.The printing ink layer is not dry: first hot press again and then glue, you can also postpone the coating date, so that it is dry. 2.The printing ink layer is too thick: the amount of adhesive coating can be appropriately increased, and the pressure and composite temperature can be increased 3.Film drying temperature is too high: the drying temperature is too high, will cause the adhesive surface crust and foaming failure, which should be appropriate to reduce the drying temperature. 4.Pressure wheel pressure is too small: there are bubbles on the surface of the entire printing product because the pressure of the pressure wheel is too small, and the pressure of the pressure wheel can be appropriately increased. The coated product has wrinkles The main reasons for the wrinkling of the coated product are the imbalance of the film transmission spoke, the inconsistency of the tightness at both ends of the film or the wavy edge, the thickness of the rubber layer, or the uneven electric wheel and the rubber spoke at both ends, the pressure is inconsistent, and the linear speed is different. Measures can be taken to adjust the transfer wheel to the equilibrium state, increase the film, adjust the amount of glue and increase the temperature of the drying channel, adjust the position and process parameters of the electric heating wheel and rubber wheel, etc.

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  • What are the advantages of water-based glue, more than you think
    What are the advantages of water-based glue, more than you think


    In daily life, we will use glue in many places, and we often see the figure of water-based glue. If you say you can't remember where you used glue, look at street posters, advertisements, and alley shoe repairmen.We usually use glue in class or work to stick some paper, bills and so on. It can be said that water-based glue has always been around us. In addition, water-based adhesives have also been widely used in some enterprises. Maybe everyone has used water-based glue, but they do not know what water-based glue is. Water-based glue is actually a kind of glue made by emulsifying polyurethane resin or acrylic acid through a certain process using water as a solvent. Water-based adhesive has been widely used in many industries. Water-based adhesive can be so popular is also related to its own advantages. Its own adhesive property is relatively good, and the object can be adhered to well. The price of water-based adhesive is relatively low, compared with other types of products, the price of water-based adhesive is lower, and this point, whether it is for individuals or manufacturers, is very beneficial.

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  • There are bubbles and spots in the composite film
    There are bubbles and spots in the composite film


    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

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  • What are the precautions in the use of water-based dry laminating adhesive?
    What are the precautions in the use of water-based dry laminating adhesive?


    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;

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