JPS58174497A - Solid lubricant for preparing corrugated board and preparation thereof - Google Patents

Abstract

PURPOSE:To obtain a solid lubricant for preparing corrugated boards capable of remarkably improving the strength, by impregnating a sheetlike base material with a lubricant in the liquid state, solidifying the lubricant, and fusing and integrating the interlayers of the sheetlike base material. CONSTITUTION:A sheetlike base material 1 delivered from a roll provided in an unreeling part is impregnated with a lubricant 2 heated in the form of a liquid in a vat 3, cooled in a cooling apparatus 5 to some extent, and then wound up. The lubricant 2 is not completely solidified, and the adjacent layers of the sheetlike base material are fused and integrated with the lubricant 2. The integrated sheetlike base material 1 is then cooled to afford the aimed solid lubricant 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solid lubricant for manufacturing corrugated poles and a method for manufacturing the same.0 In the corrugated board manufacturing process, the corrugation formability of the core is extremely important, and it affects the productivity, physical properties, etc. of the corrugated board. It is well known that this is greatly influenced by the step formability of the core. If the step formability of the core is poor, problems such as step flow and high/low conditions are likely to occur, and in severe cases, step breakage will occur, so it is necessary to reduce the operating speed of the corrugator to prevent these problems. Must not be.

Therefore, in order to improve the corrugated formability of the core, it is possible to apply heat or spray steam to the core immediately before the corrugation, or apply lubricant to the core to improve the lubricity. There are many methods used to improve sex.

The present invention relates exclusively to the improvement of a lubricant that is applied to the core to improve the slipperiness of the core.0 The lubricant that has been used conventionally is shaped like a square bar as shown in the perspective view of FIG. A molded solid lubricant was used, which was fixed in a holder and applied by pressing it against the paper web. However, such solid lubricants have the following drawbacks and cause some trouble in practice.

(il I5 Weak against impact and breakage 0) Due to height fluctuation due to decrease in solid lubricant, the tension of the core changes and it is difficult to control the amount of application.

■ In the square shape, part of the solid lubricant is fixed inside the holder, so the effective use of the solid lubricant is small.

■ It is difficult to form into a square shape.

The present inventors have conducted extensive research into a solid lubricant for corrugated board manufacturing that eliminates the drawbacks of the above-described methods, and as a result, have accomplished the present invention.

That is, the present invention relates to a solid lubricant for manufacturing corrugated board, in which sheet-like base materials impregnated with a lubricant are laminated, and the layers are welded and integrated with each other by the lubricant.

The sheet-like base material used in the solid lubricant of the present invention is easily impregnated with liquid lubricant, has a large ability to retain liquid lubricant, and is easily defibrated by rubbing with the core. However, it is better to use lubricant that sticks to the core and falls down. Examples include paper, nonwoven fabrics, and fabrics made from natural fibers such as animal and plant fibers, and synthetic polymers such as polyethylene and polypropylene. Among them, nonwoven fabrics made from pulp have a high density. Particularly preferred is one of 0.5 or less.

The lubricant used in the present invention is a lubricant that is liquid at high temperatures and solid at room temperature, including waxes such as paraffin and chlorinated paraffin, low-molecular polyolefins such as polyethylene wax, rosin, petroleum resin sizing agents, and stearic acid. Examples thereof include fatty acids and salts thereof, aluminum waxes such as aluminum oxide acylate, etc., and can be produced by using one or more of these.

The shape of the solid lubricant is preferably cylindrical or cylindrical. By taking this shape, when the solid lubricant is pressed against the paper web, the lubricant hits the paper web evenly, and by gradually rotating the solid lubricant, it prevents uneven wear and controls the tension. This also makes it possible to use almost 100% of the active ingredients of the solid lubricant. In addition, it is easier to control the amount of application compared to a square-shaped solid lubricant.The size of a cylindrical or cylindrical solid lubricant is not particularly limited, but one with an outer diameter of 50 to 500 mφ is economical and easy to handle. Cheap.

Of course, it can also be used as a reinforcing material when forming a sheet-like base material into a square shape, and the reinforcing effect is great, but it is difficult to manufacture compared to a cylindrical or cylindrical shape.

When the solid lubricant has a cylindrical shape, the core of the solid lubricant is preferably made of paper. When a paper core is used, the liquid lubricant penetrates into the core, and the core and lubricant are integrated.
It is possible to prevent the lubricant from peeling off and falling from the core.

Furthermore, even if the lubricant runs out and the core and core come into direct contact, troubles caused by this can be prevented. Furthermore, when cutting the solid lubricant into a predetermined size, the core can be easily cut.

The solid lubricant of the present invention is produced by impregnating a sheet-like base material with #l lubricant in liquid form, then solidifying the lubricant, and welding the layers together.Specifically, the manufacturing method shown below is mentioned. However, it is not limited to this.

FIG. 1 shows the most common method for producing the solid lubricant of the present invention. The sheet-like base material 1 ejected from the roll pile installed in the unreel section is immersed in the heated and liquid lubricant 2 in the pad 3, and then cooled to some extent by the cooling device 5. After cooling, it is rolled up. The lubricant has not yet completely solidified, and after the sheet-like base materials that are adjacent to each other are welded and integrated by the lubricant, they are further cooled to complete the solid lubricant 4 of the present invention.

FIG. 2 shows another method for producing the solid lubricant of the present invention.

After rotating the rolled sheet-like base material 6 slowly, the lubricant 2 heated from above and turned into liquid is dropped from the slit of the pad 7 to impregnate the rolled-up sheet-like base material. This is a method for obtaining the solid lubricant of the present invention by cooling and solidifying.

FIG. 3 shows yet another method for producing the solid lubricant of the present invention.

The rolled sheet-like base material 6 is immersed in the heated liquid lubricant 2, and while it is immersed, the roll is slowly rotated to sufficiently impregnate the entire roll with the lubricant. This is a method for obtaining the solid lubricant of the present invention by cooling and solidifying.

FIG. 4 is a perspective view showing an example of the solid lubricant of the present invention. The solid lubricant 4 of the present invention formed on the core 8 is increased in number or arranged in plural pieces according to the required width to form the shaft 10.
is fixed to the shaft by the auxiliary tool 9, and set in the full gator.

FIG. 5 is a perspective view showing an example of a conventional solid lubricant.

Half of the 11 effective parts of a conventional solid lubricant was inserted into the holder 12, and in this state it was set on a corrugator.

As is clear from this figure, the solid lubricant of the present invention uses the active ingredients more efficiently than conventional products. Ru.

FIG. 6 is a schematic diagram when the solid lubricant of the present invention is used in a single facer.

Core 1 taken out from the winder installed in the unreel section
3 is coated with the solid lubricant 4 of the present invention, and then step-formed by step-forming rolls 14 and 15. Further, the core 13, whose top part is coated with adhesive by the glue applicator roll 16, is moved between the corrugation forming roll 15 and the pressure roll 17.
It is bonded to the liner 18 by the following steps to form a single-sided corrugated board 19.

The solid lubricant of the present invention has significantly improved strength compared to conventional products, so it will not break even if it is subjected to impact from the joints of core paper winding during operation, and because of its low strength, it will not break. It is now possible to use lubricants, such as Noku Rough-In, alone, which could not be used for molded products. Moreover, since it is cylindrical or cylindrical, it is easy to mold, and 91009r can be used.

Example 1. 2. Mix 1 part by weight of zinc stearate and 1 part by weight of paraffin, heat and melt, impregnate it through a non-woven fabric made from tissue paper with a density of 0.3 and wood pulp with a density of 0.2, and roll it up. A solid lubricant of the present invention was prepared and molded to the dimensions shown in Table 1.

This solid lubricant was applied to the core and the application status was examined. The results were good and I was able to apply it all the way to the end without any problems.

For comparison, zinc stearate 1 (rough-in 1)
Comparative Example 1. This solid lubricant was not only partially depleted but also damaged by the sudden impact of the base paper joint, so it could no longer be applied.The results are shown in Table 1.

Examples 3 to 6 Molded articles were prepared by changing the composition of the lubricant, the sheet-like base material, and the dimensions of the molded article as shown in Table 2, and a drop test on a concrete surface was conducted to give Examples 3 to 6.

・Similarly, without using a sheet-like base material, the composition of the lubricant,
Comparative Example 2: Molded products were created with dimensions as shown in Table 2, and a drop test on a concrete surface was conducted.
．． It was set as 3.

The results are shown in Table 2.

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[Brief explanation of the drawing]

Figures 1 to 3 are mode diagrams showing the method for manufacturing the solid lubricant of the present invention, Figure 4 is a perspective view of the solid lubricant of the present invention fixed to a shaft, and Figure 5 is a diagram showing a conventional solid lubricant. A perspective view when attached to a holder, Figure 6 is a single facer
1. Sheet-like base material, 2. Liquid lubricant, 4.
...Solid lubricant of the present invention, 6.. Rolled sheet-like base material, 11.. Conventional solid lubricant. Patent applicant Honshu Paper Co., Ltd. Figure 2 Figure 3

Claims (1)

[Claims] 1) A solid lubricant for manufacturing corrugated board, in which sheet-like base materials impregnated with a lubricant are laminated, and the layers are welded and integrated with each other by the lubricant. Claim 1 in which the shape of is cylindrical or cylindrical
A solid lubricant for manufacturing corrugated board as described in Section 1. 3) A method for producing a solid lubricant for corrugated board manufacturing, which comprises impregnating a sheet-like base material with a liquid lubricant, then solidifying the lubricant, and welding and integrating the layers with the lubricant.