In recent years due to the development of corrugated (board) boxes

Rapidly, the upgrading of machinery and equipment, the carton industry is progressing from the traditional half-machine production to a higher degree of automated assembly line production. The average production speed has increased from 10m/min to 20m/min to 200m/min, and the speed has increased. Nearly 10 times or even more. Under this premise, the adhesive requirements of corrugated board are also higher than before. The use of corrugated board for starch adhesives is mostly based on the actual conditions of each manufacturer to formulate the manufacturing, bonding quality is similar, and now many manufacturers in order to save the cost of adhesives, while increasing the adhesive strength of cardboard, so that corrugated board The quality can reach higher requirements, so use additives, such as glue bridging agent, to increase the adhesive force of the glue. The purchase of additives for bonding becomes an important item for adhesive procurement.

There are many types of bridging agents on the market. Each manufacturer flaunts its efficacy and the cost savings that can be achieved after use. In fact, the so-called cost-saving is not only evaluated by the amount of glue used, but is assessed on the whole. We all know that in the production of corrugated board, in addition to glue, there are five other elements: steam (thermal energy), paper material, machinery and equipment, and operators. Most manufacturers believe that the addition of bridging agents to glue can change the formula of the glue to save more costs; some even think that the ratio of powder to water can be increased to make more paste. Although on the surface it is seen that more glue is made from less raw material, more cardboard can be glued. In fact, the true bonding is the bonding of starch, water only serves as a guide, and bridging agent is to strengthen the bridging and penetration of starch molecules, so to formulate a glue formula, consider There are many factors. The bridging agent is not an elixir that can cure all diseases. Only by cooperating with various factors can the best effect be achieved.

The situation of each carton manufacturer is very different, the author in the spirit of seeking common ground while reserving differences, the situation of the preparation of adhesives to do a brief introduction, only clear the preparation of adhesives in order to know how to buy different adhesive products. The formulation requirements for adhesive formulations are as follows:

Considerations for opening a paste formulation

â–  Base paper: Purchase original paper from different manufacturers as needed. .
â–  Paper materials: The number of times of recovery of straw pulp, wood pulp, waste pulp, and waste pulp.
â–  Addition of mouthwash in the papermaking process: the amount of addition is also different, such as aluminum sulfate, water repellent and so on.

â–  Quality: The degree of water repellency, surface smoothness, water absorption, water permeability, moisture content, rupture strength, tensile strength, etc., and whether the distribution of the above items on the paper web surface is average.

Select accessories

Starch (see Table 1)