Corrugated paper occupies a dominant position in the transport packaging and holds a market share of 74%. However, users also have other options, such as the use of recyclable packaging, plastic packaging, solid packaging, etc. Therefore, corrugated paper manufacturers are changing their traditional products to produce light corrugated cardboard sheets to meet the needs of users, but Can not produce any minor decision mistakes, otherwise it will endanger the status of corrugated paper in the entire market.
As the largest consumer of corrugated paper, the transport packaging of the consumer department is the most important function for the protection of the packaged articles, and the weight can only be reduced without reducing the damage rate of the packaged articles. Replacing heavy corrugated paper with lightweight corrugated paper without regard to its performance is problematic. This problem must be recognized in a timely manner. Otherwise, over time, this problem will occur in light-weight Acacia vellum, which will affect the entire corrugated paper. The reputation of the industry forces users to make other alternatives.
Roermond Papier of the Netherlands, which has three production lines, began producing light corrugated case materials (CCM) for environmental reasons in 1994. In 1996, two production lines produced these grades of corrugated paper. The weight of corrugated base paper was reduced to 90g/m2. However, their experience is not entirely applicable. For example, they cannot replace the 112 grams with 90 grams.
However, because lightweight packaging reduces transportation and storage costs and saves money, the market has driven people to use more and more lightweight materials.
However, CCM manufacturers are in a dilemma. They must make the packaging materials provide protection for the product and then become consumer packaging. In order for the goods to be delivered safely to consumers, packaging materials must be used as shelf display materials in supermarkets. Therefore, the packaging material should also be easily torn to save the retailer's time and effort.
In order to meet the market demand, corrugated paper mills should produce such products: 1. To be as lightweight as possible without sacrificing strength and performance; 2. To adapt to the increasing speed of the corrugated paper machine; 3. To meet the timely transportation program. In order to achieve this, the entire packaging industry needs close cooperation, such as paper mills must improve the performance of paper; reasonable packaging design; measurement and forecasting of the transport process and methods.
The latter is a scientific method for reducing weight, for example, carrying out a carton compression test (BCT), which is the standard method for determining the performance of corrugated cartons, especially for right-angled open-carton cartons that account for 70% of the total volume of corrugated cartons. BCT is usually performed on an empty box, while the side cover of the empty box is not fixed, and the temperature and relative humidity are not taken into consideration. Therefore, there will be up to ±10% fluctuation in the test, so that the safest angle Considering that the carton size is too large. If the corrugated box is tested when it is full of items, the side cover is fixed, and when the test temperature is 23°C and the relative humidity is 50%, the result will be more stable, which can reduce the corrugated box. Cardboard weight.
To reduce the weight of corrugated board, it must be done step by step until it reaches its limit. This requires the original paper mill, packaging design, cardboard factory and the quality of inspection packaging to work together. Lightweighting is good, but it must be checked and checked again.
One of the limits of weight loss is the "mysterious bending point." We don't know to what extent the weight has been reduced, the bending strength has dropped sharply. Sometimes when the weight is reduced to 100g/m2, the intensity decreases sharply. But where does it start? People are not very clear. Roermond cautions that this limit is closer to 90g/m2 to be lighter, but care must be taken.
In the largest area of ​​corrugated packaging, there may be a limit to the angle-slotted carton. Use caution when using light weight, and use special testing methods. For example, the corrugated box containing shoes is not the same as the cartons that contain glassware. The practical opportunity for lightweight corrugated cartons is to find new applications, such as packaging for consumer goods and display packaging in supermarkets. These lightweight corrugated boxes use miniature corrugated linings, such as E-type, F-type, or N-type corrugated, which can be used as excellent alternatives for folding cartons.
Lightweight corrugated board carton board is now an industrialized product and its definition is: the primary is lower than 125g/m2, the intermediate paper is lower than 110g/m2, according to the estimation in 1994, the microwavy paperboard consumption will be It reached 90,000 m2, and according to the 1997 production situation, this forecast is achievable. So far, the largest consumer country is Italy, followed by Germany and France.
With the increase in the use of lightweight corrugated cardboard boxes, price has become a factor to consider because lighter weights are more difficult and expensive to manufacture than heavy ones; in order to achieve the desired quality, raw materials containing more fiber must be used. In addition, according to the current state of the art, in order to meet the production requirements of light core paper, the paper mill's productivity will be significantly reduced.
The price per ton of product in the paper mill is related to the maximum output, so the paper mill equipment operates 24 hours a day and runs for 7 days a week, ie 8600 hours a year, to produce the product with the highest tonnage, so as to obtain a reasonable return on investment (Retuun On Investment (ROI). In order to obtain ROI, the heavy corrugated board carton equipment operates at a speed of 730-900 m/min, or 35 tons per hour. However, when producing light-weight corrugated paperboard carton boards to achieve the same output, the paper mill equipment must operate at a speed of 1300m/min. This is impossible, and the limit is 1000m/min. In order to increase the speed of operation of the equipment, it is necessary to improve the technical level. This is another challenge faced by the paper mills.
At the same time, people should calculate the price of light corrugated paper at the price per square meter rather than at the price per ton, but this will in turn complicate the problem. Users in the United Kingdom have long paid a small portion of the corrugated paperboard below 110g/m2, because the UK's 105g/m2 median is standard, and prices are slightly higher than those in other European countries, while lighter ones are more expensive. (Fu Zhihong, Compiling Unit South China University of Technology)
As the largest consumer of corrugated paper, the transport packaging of the consumer department is the most important function for the protection of the packaged articles, and the weight can only be reduced without reducing the damage rate of the packaged articles. Replacing heavy corrugated paper with lightweight corrugated paper without regard to its performance is problematic. This problem must be recognized in a timely manner. Otherwise, over time, this problem will occur in light-weight Acacia vellum, which will affect the entire corrugated paper. The reputation of the industry forces users to make other alternatives.
Roermond Papier of the Netherlands, which has three production lines, began producing light corrugated case materials (CCM) for environmental reasons in 1994. In 1996, two production lines produced these grades of corrugated paper. The weight of corrugated base paper was reduced to 90g/m2. However, their experience is not entirely applicable. For example, they cannot replace the 112 grams with 90 grams.
However, because lightweight packaging reduces transportation and storage costs and saves money, the market has driven people to use more and more lightweight materials.
However, CCM manufacturers are in a dilemma. They must make the packaging materials provide protection for the product and then become consumer packaging. In order for the goods to be delivered safely to consumers, packaging materials must be used as shelf display materials in supermarkets. Therefore, the packaging material should also be easily torn to save the retailer's time and effort.
In order to meet the market demand, corrugated paper mills should produce such products: 1. To be as lightweight as possible without sacrificing strength and performance; 2. To adapt to the increasing speed of the corrugated paper machine; 3. To meet the timely transportation program. In order to achieve this, the entire packaging industry needs close cooperation, such as paper mills must improve the performance of paper; reasonable packaging design; measurement and forecasting of the transport process and methods.
The latter is a scientific method for reducing weight, for example, carrying out a carton compression test (BCT), which is the standard method for determining the performance of corrugated cartons, especially for right-angled open-carton cartons that account for 70% of the total volume of corrugated cartons. BCT is usually performed on an empty box, while the side cover of the empty box is not fixed, and the temperature and relative humidity are not taken into consideration. Therefore, there will be up to ±10% fluctuation in the test, so that the safest angle Considering that the carton size is too large. If the corrugated box is tested when it is full of items, the side cover is fixed, and when the test temperature is 23°C and the relative humidity is 50%, the result will be more stable, which can reduce the corrugated box. Cardboard weight.
To reduce the weight of corrugated board, it must be done step by step until it reaches its limit. This requires the original paper mill, packaging design, cardboard factory and the quality of inspection packaging to work together. Lightweighting is good, but it must be checked and checked again.
One of the limits of weight loss is the "mysterious bending point." We don't know to what extent the weight has been reduced, the bending strength has dropped sharply. Sometimes when the weight is reduced to 100g/m2, the intensity decreases sharply. But where does it start? People are not very clear. Roermond cautions that this limit is closer to 90g/m2 to be lighter, but care must be taken.
In the largest area of ​​corrugated packaging, there may be a limit to the angle-slotted carton. Use caution when using light weight, and use special testing methods. For example, the corrugated box containing shoes is not the same as the cartons that contain glassware. The practical opportunity for lightweight corrugated cartons is to find new applications, such as packaging for consumer goods and display packaging in supermarkets. These lightweight corrugated boxes use miniature corrugated linings, such as E-type, F-type, or N-type corrugated, which can be used as excellent alternatives for folding cartons.
Lightweight corrugated board carton board is now an industrialized product and its definition is: the primary is lower than 125g/m2, the intermediate paper is lower than 110g/m2, according to the estimation in 1994, the microwavy paperboard consumption will be It reached 90,000 m2, and according to the 1997 production situation, this forecast is achievable. So far, the largest consumer country is Italy, followed by Germany and France.
With the increase in the use of lightweight corrugated cardboard boxes, price has become a factor to consider because lighter weights are more difficult and expensive to manufacture than heavy ones; in order to achieve the desired quality, raw materials containing more fiber must be used. In addition, according to the current state of the art, in order to meet the production requirements of light core paper, the paper mill's productivity will be significantly reduced.
The price per ton of product in the paper mill is related to the maximum output, so the paper mill equipment operates 24 hours a day and runs for 7 days a week, ie 8600 hours a year, to produce the product with the highest tonnage, so as to obtain a reasonable return on investment (Retuun On Investment (ROI). In order to obtain ROI, the heavy corrugated board carton equipment operates at a speed of 730-900 m/min, or 35 tons per hour. However, when producing light-weight corrugated paperboard carton boards to achieve the same output, the paper mill equipment must operate at a speed of 1300m/min. This is impossible, and the limit is 1000m/min. In order to increase the speed of operation of the equipment, it is necessary to improve the technical level. This is another challenge faced by the paper mills.
At the same time, people should calculate the price of light corrugated paper at the price per square meter rather than at the price per ton, but this will in turn complicate the problem. Users in the United Kingdom have long paid a small portion of the corrugated paperboard below 110g/m2, because the UK's 105g/m2 median is standard, and prices are slightly higher than those in other European countries, while lighter ones are more expensive. (Fu Zhihong, Compiling Unit South China University of Technology)
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