JPS58158237A - Manufacture of reinforced corrugated cardboard - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preparing reinforced corrugated board, and more specifically, to a method for manufacturing reinforced corrugated board using core base paper that has been strengthened on a Tsurugator machine. be.

One of the most important things about corrugated cardboard in Kinto is to save resources, save energy, and reduce costs.
41 of m] and is heading in the direction of becoming an insult. However, excessive 11kJl of base paper reduces the strength of the corrugated board, making it impossible to sufficiently preserve the contents, which is the original purpose. For this reason, methods have been adopted to suppress the decline in strength of corrugated boxes due to the light violet nature of the base paper, by strengthening the base paper, particularly the core.

Methods for reinforcing base paper include mixing synthetic fiber pulp with wood pulp during the papermaking process, adding reinforcing chemicals internally or coating them with chemicals using a size press, and reinforcing chemicals through post-processing after papermaking. There are coating methods, impregnation methods, etc. Furthermore, various strengthening methods are used on or after the first corrugator for manufacturing corrugated board. Furthermore, a partial reinforcement method is also used to strengthen only the portion necessary for box strength by partially strengthening the liner or core.

The present invention relates to a method for preventing a decrease in box strength due to the weight reduction of the base paper by reinforcing the core base paper in the Korg Termachine 7 for manufacturing corrugated poles.

Conventionally, several methods have been proposed for strengthening base paper on a corrugator machine. There are methods of reinforcing the liner or core after bonding, such as applying a reinforcing chemical with a roll coater or dispersing the chemical using a spray method. However, the method of strengthening the base paper before forming and laminating it with the corrugated forming rolls tends to dry the base paper under insufficient pressure during forming and laminating, and often causes adhesion between the corrugated forming rolls and the chemical-coated surface. This causes operational troubles such as cut-offs, high-lows, and paper peeling. To prevent this, facilities and facilities for drying are required.

The method of strengthening the liner surface dIJ after lamination with single-sided corrugated cardboard using a roll coater, spray, etc. between the bridge and Double 7 Acer also tends to cause adhesion problems, and blocking occurs when the finished corrugated sheets are piled up. There is a danger. In addition, the method of spraying and reinforcing the core rkJK reinforcing chemicals after bonding one-sided corrugated cardboard has the disadvantage that although it can be applied uniformly to the paper's flow direction, it tends to become uneven in the width direction. Moreover, when the lamination speed changes, the spray amount can be controlled by 1 separation. Furthermore, in the case of the spray method, the amount of spray tends to become unstable due to the clogging of the chip due to foreign matter and the narrowing of the diameter of the chip due to the accumulation of solids in the spray liquid. Each method has its pros and cons, and there is no known method that is satisfactory.

The inventors of the present invention solved the drawbacks of the method that they learned and conducted intensive research on the improved method of reinforcing corrugated cardboard, and as a result, they came up with the present invention.

That is, the present invention provides a method for manufacturing single-sided corrugated board or double-sided corrugated board by laminating a flat liner on one or both sides of a continuously corrugated core. The present invention relates to a method for producing reinforced corrugated cardboard, in which a reinforcing chemical is applied to the cardboard using a brush roll.

In the present invention, the brushes of the so-called brush roll may be provided on the entire surface of the roll, or may be provided partially. If the brush is applied over the entire surface, the entire center core will be strengthened, but if the brush is applied partially, the strengthening agent can be applied in any pattern, and the areas that truly require reinforcement will be strengthened. It is extremely effective because it can be applied only to

In unexploded IJA, the core coated with reinforcing chemicals is the fourth
As shown in the figure, the center of the liner lamination circle and/or the 51st! ! ! ! This is the center of a non-inner bonded image between a single facer and a double facer. No matter where you apply the coating at this threshold, the reinforced treated surface will be covered with the liner, so there will be no adhesion problems like with conventional methods. Both Acer 7 are near the horizontal applicator roll.

There are no particular restrictions on the strengthening treatment chemicals, including stain-hole adhesives, which may be the same as the bonding adhesive, or may be different.A chemical-coated lid is not required. Although it varies depending on the quality of the
100 f/wl.

The viscosity of the strengthening treatment chemical used in the present invention is 1000CP
The above can also be used. Spray one-way spray
Generally, a relatively low viscosity product with a consistency of 50 CP is suitable, and a high viscosity product results in unstable spraying and troubles such as nozzle clogging, making it impossible to use. Also, according to the method of the present invention, there is no need to worry about nozzle clogging due to people with different proboscises, so it is a must! Depending on the requirements, it is also possible to mix granular powder fillers such as calcium carbonate, Merck, and kaolin, and fibrous substances such as pulp fibers, glass fibers, and synthetic fibers into the reinforcement treatment chemicals. Furthermore, the reinforcing embedding agent can be applied not only in liquid form but also as a foam-like fluid liquid containing air bubbles for 4 hours.

The brush roll used in the present invention consists of a roll body and brushes installed in the roll body.

The material of the roll body should be tough and hardened by hardening chemicals. The material of the brush planted in the main body is natural animal and plant fibers, nylon or other non-metallic filamentous materials, wire or other metallic filamentous materials, etc., and those that are resistant to strengthening chemicals are used. . The thickness of the brush is not limited in any way, but generally a brush with a thickness of 0.01 to 1 cm sand is used.

The following drawings (therefore, the misfire @ will be explained in detail).

, 71 is a diagram showing the original cycle of coating a reinforcing chemical according to the method of the present invention. The brush roll 1 consists of a main body 2 and a brush 3 disposed on the main body. The brush roll 3 does not need to be integrated with the brush roll 2, and can be prepared according to the coating, cover, and coating turn, and can be set on the roll body using a cartridge method. It is interesting that the drive is designed so that the circumferential speed ratio is constant so as to be able to cover the circumferential speed fluctuations of the main drive as much as possible. This makes it possible to maintain a constant amount of reinforcing chemicals applied to the core.

In the m1 diagram, the reinforcing chemical 7 is pumped up by the control roll 4, and between it and the doctor roll 5 to adjust the amount pumped up. Equalized by 1iK. Excess chemicals are scraped off the doctor roll by the doctor blade 6.

The strengthened girl a7tt is moved by the control roll 4 Ofl&, and is formed into steps by the centrifugal force and anti-light force of the push roll l's brush, becoming a droplet 9 in the direction of the friend center core 8, and flying out into the middle g * plane Ef 4 layered and strengthened inside. It becomes 810. The tip of the brush is fused with at least the outer periphery of the reinforcing chemical 7 transferred by the control roll 4, and is in contact with the control rule main body 4. As the brush roll l rotates, the brush rotates in an arc while expanding its arc, and when it meets the control roll 4, the brush 3 rotates in the opposite direction while being pressed in the direction of rotation of the control roll 4, and when it reaches a certain limit, the brush rotates in the opposite direction. 3 is restoration repulsion and localization tItK
Return. At this time, the reinforcing chemicals 7 adhering to the brush 3 are scattered as droplets in one direction by the centrifugal force caused by the iai@ of the brush roll and the anti-wax force of the brush 3, and adhere to the surface of the core. do.

The amount of the reinforcing chemical applied can be controlled by using a 11mm roller between the control roll 4 and doctor roll 5, by controlling the circumferential speed of the flange μm, by controlling the circumferential speed of the control roll, or by using the brush of the push roll l. Length of 3, #1
1IL, thickness, density, and the pressing force between the control roll 4 and the brush roll 1 are controlled by a method, etc.

It can also be controlled by adjusting the viscosity, viscoelasticity, etc. of the reinforcing chemicals used.

Coating device s using a brush roll of the present invention! The apparatus shown in mx- may be provided completely independently, or may be attached to the corrugated board adhesive coating apparatus as shown in FIG. 4.5.

Maki 2% Figure 3 shows a coating device using a brush roll.
Figure 2 shows a uniformity different from I-, in which the brush 3 of the brush roll L directly contacts the reinforcing chemical 7 stored in the vat without using a control roll or doctor roll.
This is a case where the coating is applied directly by rotating the contact brush roll. Fig. 3 is a modification of Fig. 2, in which the rose (11) containing the reinforcing chemical 7 is surrounded by an arc so as to be in contact with the brush 3 as shown in the figure, and the opening in the 1g1 rotation direction is shown in Fig. 3. Since the brushes are pinched together, the brush 3 scatters the reinforcing chemicals in the form of droplets due to the centrifugal force caused by the rotation of 1 g and the repulsive force of the brush.

The brush and roll coating device of the present invention has a reinforcing chemical t-
IC1ili for every surface of the core to be considered! ! In this case, it is possible to apply reinforcing chemicals to different sides 411 for each coating device to strengthen the putter with a wide variety. Also, are there different strengthening chemicals for each type of construction equipment? It is also possible to apply it or use a two-liquid reaction JM Kuwahin.

FIG. 4 is a schematic diagram in which the present invention is applied to a Nungurfacer, in which a brush roll is attached to one applicator roll. The core 12 is corrugated by corrugating rolls 13, 14 and the adhesive is subsequently applied to the top of the corrugation by a uniform applicator roll 15. A reinforcing chemical is applied to the corrugated top and corrugated portions of the corrugated core using the corrugating roll 14 and the pressure roll 17, and the reinforcing treatment surface is covered with the liner. I overturned single-sided cardboard 19
becomes. In this case, the tank applicator roll 15 and the doctor roll 16 also serve as the control roll 4 and doctor roll 5 of the hexagonal system, making it possible to minimize the need for additional step ends.

Also, for this adaptation, the same adhesive for corrugated board and core reinforcing chemicals are used.

FIG. 5 is a schematic diagram in which the present invention is applied to a double swacer, in which a brush roll is attached to a field applicator roll in the same way as in FIG. J)
llK-+iI! The single-sided corrugated board coated with the reinforcing agent F is laminated with a liner and dried by passing through a hot plate 21 to become a double-sided corrugated board 22.

In this way, the types of corrugated cardboard produced by the method of the present invention include single-sided corrugated cardboard that has been reinforced only on the liner-attached side of the core, double-sided corrugated cardboard that has been reinforced only on either the single or double side of the core, and Although reinforced double-sided corrugated cardboard is available, it is of course also applicable to multi-sided corrugated cardboard.

According to Akira's method, partially reinforced cardboard can also be produced very easily.

Figure 46 shows the i? of the brush roll for one-minute reinforcement. The broom 711a is also a sectional view from the @ plane, and the pushers 3 are arranged at an arbitrary width in the width direction of the roll body 2.

By using such a brush roll, it is possible to produce partially reinforced cardboard with only 11 parts reinforced as shown in Figure 8.
It is possible to make a cardboard box as shown in Fig. 9 by using this cardboard. The dotted area 23 in Figure 8.9 represents the reinforced part of the center core.

FIG. 10 is a normal RFJ cross-sectional view showing another specific example of a brush roll for partial reinforcement, and FIG. 11 is a side cross-sectional view of the brush roll, in which the brushes 3 are arranged at an arbitrary width in the circumferential direction of the roll body 2. has been done. By using such a brush roll, it is possible to produce a partially reinforced corrugated board in which only the dotted portion 23 of the core is reinforced as shown in FIG.

It is possible to make a cardboard fence like the one shown in the GTA diagram by using this cardboard.

Fig. 14 is a front sectional view showing yet another specific example of a brush roll for partial reinforcement, Fig. 15 is a sectional view of the same <m plane, and Fig. 16 is a perspective view, showing that the brush roll is a brush roll for partial reinforcement. By using a brush roll like this, which shows the part where No. 3 is placed, it is possible to strengthen only the part 23 where the center core is marked as shown in Fig. It is possible to make a cardboard box like the one shown in Figure 18 without using cardboard.

FIG. 19 shows yet another specific example, and is a perspective view of an example in which the brushes 3 are arranged circumferentially and spirally with respect to the roll body 2, and the oblique part shows the part where the plan 3 is arranged.

By using such a brush roll, it is possible to make a partially reinforced corrugated board in which only the point 23 of the center core is reinforced as shown in Fig. 20, and this corrugated board is
It is possible to make a cardboard box like the 21st WJ by doing this.

As detailed above, according to the method for producing reinforced corrugated board of the present invention, it is possible to easily apply the KljI agent to the core paper portion formed into a corrugated shape on a corrugator, and the
Fili! Partially reinforced cardboard is extremely easy to make.
It is possible to build d.

[Brief explanation of drawings]

Figures 41 to 3 are diagrams of a coating apparatus using a brush roll used in the present invention, Figure 4 is a schematic diagram of the case where the present invention is applied to a Schifguru facer, and Figure 45 is a diagram of a double facer.
Schematic diagram when the present invention is applied to IE6Fg
7 is a front sectional view showing a specific example of a brush roll used in the invention, FIG. 7 is a 111 sectional view taken by -A-person in FIG. Step pole with core coated with reinforcing chemicals, Figure 9 is 1ji48
The cardboard box made from the corrugated poles shown in the figure, Figure 1θ is a front sectional view showing another specific example of the brush roll used in the present invention, and Figure 11 is the Ii of Figure 10! ! 111 new drawings by 3-BK, Figure 12 shows corrugated cardboard whose inner core has been coated with a reinforcing chemical T using the brush roll shown in Figure 10.11, and Figure 13 shows cardboard made from the corrugated pole shown in Figure 12. cardboard box,
Fig. 14 is a front sectional view showing yet another specific example of the brush roll used in the present invention, and Fig. 15 is a cross-sectional view of the brush roll shown in Fig. 14.
Confucian 1 cross-section diagram by C, Raku 16 diagram is No. 14.1511KI
The diagonal #4 diagram of the brush roll shown in K, and Figure 17 are 14th to 1st.
Fig. 6 shows a corrugated board whose inner core is coated with a reinforcing chemical using a brush roll. Examination showing specific examples-1 No. 20-
FIG. 21 is a diagram of a corrugated cardboard tower made from the corrugated cardboard shown in FIG. 20. FIG. l... Brush roll 2... Brush roll body, 3... Brush, 7... Strengthening chemicals, 1
2--Instep core, 19--Cardboard with the reinforced side of the center core set with liner, 22--Both sides of the double side lie of the center core, where the bonding circle has been reinforced. Cardboard, 23...Cardboard with partially reinforced core or ib
tM-le box reinforcement treatment pattern. Patent Applicant Honshu J11141t Closed Company 1st Body 2 Figure 3 Figure 4 Figure 2 67 Figure 7 Figure 8 Figure 9 Figure 10 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 19 Figure 20 Old figure 3 Do6 Figure 21 3

Claims (1)

[Scope of Claims] 1) In a method of manufacturing single-sided corrugated board or double-sided corrugated board by laminating a flat liner on one or both sides of a continuously corrugated core, the surface of the core after corrugation A method for producing reinforced corrugated cardboard, comprising applying a reinforcing chemical to at least one stroke of the cardboard using a brush roll. 2) The reinforced corrugated board according to item 1 of the scope of the patent application, characterized in that the brushes of the brush roll are disposed not on the entire surface of the roll but partially, so that the portion coated with the reinforcing chemical has an arbitrary pattern. How to make it