How Gift Paper Boxes companies can deal with problems in seasonal production

How Gift Paper Boxes companies can deal with problems in seasonal production

Gift Paper Boxes enterprises are production-oriented enterprises with many production links and many factors that affect product quality. These factors can be divided into internal factors and external factors, and can also be divided into controllable factors and uncontrollable factors. According to the relevant principles of enterprise management, when there is a problem in the production process of Gift Paper Boxes, it is generally necessary to start from people (production site personnel), machines (production equipment and utensils), laws (production rules and regulations), materials (production materials), and environment (production environment). ) 5 major factors, through specific research and analysis to determine what are the direct influencing factors, find the problem, establish a perfect process system and mechanism, adjust the control parameters in time, and ensure the stability of product quality.

Every time the seasons change (especially spring and summer or autumn and winter), it is the time when Gift Paper Boxes production is most prone to problems. Among these problems, the most prominent ones are excessive solvent residues, decreased printing quality, white spots in the composite link or decreased composite strength. The direct influencing factor that causes these problems is the "production environment" factor in the above five major factors, because seasonal changes will inevitably bring about changes in the environment, and the most obvious changes are changes in ambient temperature and humidity. However, if the Gift Paper Boxes production is carried out in the GMP workshop with constant temperature and humidity, it should be another matter; but for most Gift Paper Boxes enterprises in my country, the seasonal production problem of Gift Paper Boxes is still very prominent and should be paid attention to. Enterprises should list the key control parameters of each link of the production process according to the seasonal characteristics of the region, establish files after verification, and establish key control points. Next, I will share with you some actual cases of seasonal production of Gift Paper Boxes, hoping to play a role in attracting others.

Example 1

One year, spring came relatively late, and it wasn't until the beginning of April that Chengdu felt the warmth of spring. Considering the printing effect and solvent residue control, the ink solvent used by our company in winter printing is mainly ethyl acetate, which dries faster. However, after entering mid-April, the temperature quickly warmed up, and the operators still prepared the ink solvent according to their previous habits, resulting in problems such as poor ink transfer, loss of dots, and dry printing. We then added n-propyl ester to the solvent, which slowed down the drying of the ink, and things got better.

Example 2

At present, when our company produces most of the retort packaging, a certain amount of curing agent will be added to the polyurethane ink. The selected curing agent is generally isocyanate-terminated polyurethane that is very sensitive to hydroxyl (-OH). However, it should be noted that in a high-humidity environment, this curing agent will react with moisture in the air, resulting in the following effects: 1. The curing agent is consumed, and this curing agent is generally expensive, increasing the cost pressure, At the same time, it will also increase the risk of peeling strength problems; ② bubbles are generated between the composite layers, resulting in poor appearance of the composite product; ③ the reaction product is polyurea-type polyurethane with high cohesive energy, which will form spots and crystal points in the composite link; ④The hard shell of the surface layer can also prevent the volatilization of the internal solvent, resulting in an increase in the residual amount of the solvent. In addition, the high temperature also promotes the reaction rate of the curing agent with moisture in the air. After our company noticed this problem, we appointed a special person to keep and store the ink consumables, and use the prepared ink as soon as possible. The remaining ink must be stored in a cool and ventilated place. Store in a sealed container. When it is in the season of high temperature and high humidity, these measures need to be further implemented.

Example 3

BOPA film is a commonly used substrate in the production of Gift Paper Boxes. Due to the existence of one NH- and one C-O= in the molecular structure of BOPA, hydrogen bonds will be formed. When water is approached, water molecules will also intervene to form molecular chains. Longer hydrogen bonds increase the flexibility and breathability of the BOPA film. Experiments have shown that when a BOPA film with a length of 100mm is placed in a high humidity environment for 10 minutes, it will grow to 110mm, with a change range of 10%. This feature of BOPA film is very unfavorable for production. A little carelessness will cause a phenomenon similar to the "ruffled edge" of paper, and lead to quality problems such as inaccurate overprinting, specification deviation, and compound spots. Therefore, during the seasons when the humidity changes significantly, special attention should be paid to the storage and use of BOPA film, and try to avoid placing it in a high-humidity environment. In addition, temperature is also a factor that needs special attention. BOPA film is also sensitive to changes in ambient temperature. Therefore, during storage and use, appropriate temperature parameters should be set to avoid expansion and deformation of BOPA film caused by temperature changes, and therefore Unnecessary troubles brought to normal production.

Example 4

One year in summer, the rain is particularly abundant, and the temperature is also high, which is a typical high temperature and high humidity environment. The author found that the adhesion between the aluminized layer and the base material of the MCPP and MPET products produced in the workshop at this stage became worse, and the aluminized layer even fell off directly. The MCPP aluminized layer fell off more seriously. The reason is due to the involvement of water molecules. The polarity of the PET film is stronger than that of the CPP film, so the MCPP film is easier to

Example 5

In the extrusion lamination process, many operators often ignore the influence of ambient temperature and humidity, as did the author before. But later I realized that the change of humidity has a very important influence on the composite strength of extruded composite products. The film blowing process is more sensitive to the ambient temperature. During production in winter and summer, the corresponding processing parameters need to be adjusted, and the temperature difference is generally around 10 °C.

Example 6

In the printing process, the problem of ink deterioration caused by solvent volatilization caused by changes in ambient temperature and humidity is very common, and this problem also exists in the composite process. Solvent volatilization requires a certain amount of energy. During the volatilization process, the solvent in the glue tray or the glue on the surface of the film will take away part of the heat, which will reduce the temperature of the surrounding air, so the rubber tray usually feels cold. When the temperature reaches below the condensation point of water vapor, moisture will accumulate on its surface, and when the adhesive between the film and the coating roller is separated at a high speed under the action of the roller, the moisture will take the opportunity to enter it. The author has conducted tests, and the data shows that the water content of the newly prepared glue is 0.03%, and the water content will reach 0.46% after half an hour of use in the unsealed state. At this time, the composite white point is obvious, the colloid is white, The viscosity increases, and this phenomenon is more obvious in the environment of high temperature and high humidity.

Example 7

There was a year when the summer temperature was very high, but there was no rainfall for a long time. In such a high temperature and low humidity environment, the static electricity generated by the friction of the film is difficult to conduct and eliminate by grounding, and the accumulation of static electricity to a certain extent will not only have a significant impact on the quality of printed products, but also generate electrical sparks and even cause fires , causing personal and property damage. Therefore, in this environment, special attention should be paid to the control and elimination of static electricity through static elimination equipment and methods of controlling environmental humidity.

To sum up, Gift Paper Boxes enterprises should pay attention to seasonal production problems, especially pay attention to and control the temperature and humidity of the production workshop, install temperature and humidity adjustment instruments, arrange special personnel to monitor data, form record files, and try to control the ambient temperature at about 24 ℃. , the relative humidity is controlled at 60%; once abnormality is found, it should be dealt with in time, adjust the process, eliminate hidden dangers, and ensure safe production.

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