Corrugated paste added water-resistant plastic carton In the corrugated board production process, a suitable amount of high molecular polymer (also known as cross-linking agent or bridging agent) is added to the starch binder, and the high-molecular polymer replaces the hydroxyl group in the starch molecule. Make the corrugated paste line have better waterproof and moisture-proof effect. Through the study of the basic properties of the solid content, viscosity, pH value of the aqueous ink and the color density and chromatic aberration of the proofing strip, it is found that the solid content, surface tension and viscosity value of the aqueous ink range from 2 to 5 stable. In the meantime, the production and construction of the paper industry has also stagnated, and most of the papermaking projects under construction have been shut down. There are several models for thinking about the use of agricultural straw pulping: there are large-scale pulp and paper enterprises that use OCC as raw materials, and they can adopt a high-yield chemical mechanical pulp technology route to add straw pulping lines for copying with OCC. Production of high-strength corrugated base paper and natural packaging paper, preparation of waste into pellet fuel or organic compound fertilizer. At the technical and equipment level, the state and relevant departments should actively organize scientific research to carry out research on technology and equipment. The combination of vegetable and wood cooking chemical pulping can improve the evaporation and concentration of black liquor and achieve smooth operation on the traditional alkali recovery system. Put a 50 ml volumetric flask in an ice water bath, add distilled water to the flask, and mix the pyridine glacial acetic acid mixed solution in the cap bottle into the ice water rotated by the magnetic stirrer and the rotor under stirring. The machine recovered the precipitate and washed 3 times. Cardboard temperature overheating is a problem that is easy to occur in summer. When the temperature of the paperboard is too high, there will be no printing on the printing, which will also cause the humidity of the water vapor board formed in the equipment to increase, leading to subsequent deinking of the printing. The shaded corrugated board is usually coated by a curtain coating method, and a molten synthetic resin or paraffin mixture is coated on the surface of the corrugated cardboard to form a resin film or a wax film. The aluminum-plated polyvinyl chloride film is combined with kraft paper to make a carton, which is also waterproof and moisture-proof. Mechanical properties of composite membranes The tensile strength of PLA composite membranes is affected by the addition of acetylated lignin to cresol. As shown in Fig. 4, the tensile strength of the composite membrane decreases first and then rises with the addition of acetyl acetate. In the gentle trend, the addition of acetic anhydride modified products showed a downward trend. Acetylated lignin p-cresol and polylactic acid were blended and weighed into 00 g of PLA in a 250 ml three-necked flask, 32 ml of chloroform was added, and it was stirred in a water bath at 90 ° C until completely dissolved, 20 g (equivalent to PLA) 5% by mass of acetylated lignin p-cresol was dissolved in 5 ml of chloroform solution, stirred with a glass rod until completely dissolved, and then added to a three-necked flask and stirring was continued. Therefore, the temperature of the paperboard should not be too high when printing, otherwise the printing will be lost. Therefore, it is necessary to check the ink supply system regularly. If it is found that the ink is leaking, it needs to be processed and repaired in time.
At the same time, the pH value has a great influence on the stability and drying property of the ink. If the pH value is too large, the ink is alkaline, and the alkaline resin is relatively dissolved, which reduces the ink itself. The adhesion, some bubbles appear in the printing, which has a certain impact on the printing quality. Many people think that the ink is too slow to dry or the ink wear is not good, but it is not the case. There are many reasons for the stain on the cardboard, such as mechanical oil leakage. Once the paperboard is produced, there will be oil stains. So the ink is the same. China's paper and board production and consumption exceeded the United States for the first time in 2009 and has become the world's largest paper producer and consumer for nine consecutive years. Mirror coated paper self-adhesive label High-gloss label paper for high-specification and multi-color product labels, suitable for information labels for medicines, foods, edible oils, wines, beverages, electrical appliances, and stationery. The pressure, sharpness, and contact position of the blade have an effect on the print quality. The great decision-making of reform and opening up has brought about a good development opportunity for the paper industry that has been abandoned, and has embarked on a new development journey. Below, the corrugated carton waterproof and moisture-proof scheme is sorted out. The following 10 major schemes are worthy of reference in the industry: heavy glue-gluer board paper in the paper-making process of the boxboard paper, the surface of the cardboard paper is heavily sized to ensure the water droplets on the surface 5 No penetration within minutes. The elastic device shown in Fig. 2 is a rubber pneumatic tire, and the sealing strip faces the surface of the inner surface of the vacuum roller housing to process the groove, and the groove on the surface of the sealing strip communicates with the cleaning water pipe of the vacuum roller through the communication line.
First of all, we must work hard to further improve the recycling rate of waste paper in China. It can also be directly varnished on the surface of corrugated board, but the waterproof effect is not good, and it may damage the pressure resistance of the carton. The working principle is as follows: the water spray hole or the water sprayed from the spray head is sprayed vertically to the inner wall of the casing to clean the air suction hole of the casing.
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