Production process modification and control method for realizing reduction of corrugated box

Time：2017-09-20 17:28:56

With the gradual improvement of environmental protection requirements in the packaging industry, reduction of corrugated boxes has become an important issue in the corrugated box industry. Corrugated carton enterprise through the transformation and control of the production process, under the premise of ensuring the strength of corrugated box, the corrugated paperboard consumption is obviously reduced, which can not only achieve the requirements of environmental protection, and can make the corrugated carton enterprise obtain good economic benefits. In this paper, several process modification and control methods for reduction of corrugated boxes are provided, which are for reference only in the industry.

Nanometer corrugated paperboard with low quantitative and high strength is adopted

The use of low volume and high strength corrugated paperboard is one of the important ways to reduce the amount of corrugated boxes. Nano corrugated cardboard is by adding nano filler, in ensuring the strength of corrugated cardboard at the same time, reduce the amount of base paper.

M calcium carbonate and high performance additives, through special processing equipment, made of nano additives for papermaking; then the additive added concentration is about 1% of the mixed slurry, the paper machine bundle pipe headbox to spray forming net, containing nano calcium carbonate corrugating medium composition, because nanometer calcium carbonate can be tightly combined with the fiber, in the presence of auxiliaries, about 80% nanometer calcium carbonate retention in corrugating medium; after high vacuum dehydration, pressing treatment, high temperature drying process, forming water nano corrugated paper 8% the left and right, so as to make a quantitative low high strength corrugated board. It has been proved by practice that the corrugated cardboard box made of nanometer corrugated cardboard of about 90g/m2 has the same strength as the corrugated carton made of ordinary corrugated cardboard of about 150g/m2.

Corrugated roll

The corrugated board's height, wave number and wave shape are the important factors that affect the strength of corrugated paperboard, and corrugating roll is an important factor to decide the parameters of corrugated cardboard. The amount of corrugated paperboard can be effectively controlled by rebuilding corrugated roller.

1. change the number of teeth of corrugating roller

We have done this experiment: there are two same types of single machine, parameters are 30cm per unit length of corrugated teeth for 44 teeth, corrugated roller teeth height is 3.12mm, which will be a single-sided corrugated roller machine replaced parameter is 30cm per unit length of corrugated teeth for 48 teeth, corrugated the roller teeth height of corrugated roller 2.9mm, but the thickness index of corrugated board is still control in the standard range. Thus, the number of teeth on the side of the converted single machine (hereinafter referred to as "No. 1 machine") is 4 more than that of the single machine without modification (hereinafter referred to as "No. 2 machine"), and the height of the toothed teeth is lower than that of the No. 2 machine 0.22mm. In the production process, environment, quality of paper are the same, conducted a number of experiments with single machine production of the two units of the same type, by comparing the data of on-line detection analysis, obtained the following conclusions: No. 1 machine with corrugated paper can produce 1.405m 2m long long corrugated cardboard, 2m long corrugated paper can only produce 1.385m corrugated cardboard with No. 2 and No. 2 machine, production of corrugated cardboard edge crush strength and surface compressive strength were slightly lower than that of No. 1 unit. It can be seen that No. 1 machine not only uses paper more than machine No. 2, but also produces more corrugated cardboard.

Mm not worth mentioning, but looking at what can be found, the number of corrugated single machine after the transformation of savings but considerable. If the average paper single machine width is 1.6m, the average paper of 125g/m2, according to an annual production of corrugated board length is 3.1104 * 107m estimates, No. 1 (corrugated rate 1.423) consumes 4.4261 * 107m long corrugated paper, No. 2 (log rate 1.444) consumes 4.4914 * 107m long w corrugated base paper, namely 2 machine more than 1 machine using 6.53 * 105m long corrugated paper, corrugated paper save the amount of =6.53 * 105m * 1.6m * 125g/m2=1.306 * 108g=130.6 tons, if the corrugated paper price by 2000 yuan / ton, worth more than 260 thousand yuan. Visible, in the premise of not affecting the quality of finished products, through the corrugated roller transformation, can bring a very considerable profits to enterprises.

2. using tungsten carbide corrugated roller

The corrugation of ordinary corrugating roll is not wear resistant, and the area of the top of the corrugated tooth will become larger after wearing, which will directly affect the quality of corrugated cardboard, and also increase the amount of base paper to some extent. The abrasion resistant tungsten carbide corrugated roller can improve the service life of the corrugated roller, effectively reduce the wear and tear of the top and the side of the corrugated tooth, thereby improving the processing quality of the corrugated cardboard. In addition, the tungsten carbide corrugated roll teeth surface abrasion resistant coating layer, so the teeth height and thickness is relatively stable, can effectively avoid the corrugated roller "concave" phenomenon, and caused by "concave" phenomenon of degumming, collapse and low pile, foaming and other defects, greatly reduced the production of substandard corrugated cardboard. Although tungsten carbide corrugated roller is more expensive, but its life expectancy is universal

3. Control the quality of corrugating medium

The quality of corrugated paper directly affects the quality of corrugated paperboard after molding, especially corrugated paper moisture, plastic index degree, water absorption, compactness and transverse compressive strength, impact strength of the finished corrugated box is most obvious, therefore, the corrugated paper detection control is very important. For example, if the corrugating medium water is too high, the evaporation of water in the forming process of corrugated cardboard, corrugated cardboard will lead to contraction, then consumption will increase even corrugated paper, corrugated board appear rough edge phenomenon; if the corrugated paper sizing degree is poor, its water absorption also increases, the sensitive response to humidity the external environment, easy to absorb moisture in the air and make the corrugated soft, the strength decreases, paper consumption will also increase