JPS6285933A - Method and device for manufacturing composite corrugated board - 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] [Industrial application field] The present invention applies, for example, to a plastic sheet on the negative side.

plastic film, plastic 7ohmmut,
Plastic cloth, synthetic leather, cloth, non-woven fabric.

AM materials, decorative materials, waterproofing materials, heat retention materials, and insulation materials for covering materials such as aluminum whistles, aluminum vapor-deposited films, and electrolytic steel lodgings.

The present invention relates to a method for producing a special composite corrugated board pasted as a reinforcing material and its production vcffl.

[Prior Art] This type of corrugated cardboard is used as a variety of materials, such as interior materials for passenger cars and buildings, and packaging materials, depending on the material of the top covering material, but the conventional manufacturing method is extremely inefficient. Met. For example, the upper and lower plates are heated with steam, the cardboard, heat-sealed film, and top layer are layered on top of the lower plate, and the upper plate is pressurized from above, melting the heat-sealing film and forming the cardboard. Since it was used to bond the top covering material,
Not only does the process of adhesion take a long time, but it also requires a considerable amount of equipment, which inevitably leads to high costs. Therefore, the present inventors developed a manufacturing method in which a top covering material is attached during the manufacturing process of corrugated cardboard structures, and filed a patent application in 1983.
-217560 etc., filed by the present applicant and has already been published. This method can be used to manufacture g1r! with just a few modifications to the conventional cordate machine. 1 can be obtained, and in a part of the Cordate machine's Gupuru 7 Acer, at least the overlay material is fed into the corrugated structure between the drive belt and the driven belt at the same time, and the overlay material is reeled in between the drive belt and the driven belt. A driven belt accompanies the movement of the upholstery while in contact with the belt, and during this movement, the amount of heat required to bond the upholstery to the corrugated cardboard structure via the driven belt is 4! This has been improved so that it can be given gradually.

(Thus, the present applicant succeeded in mass producing laminated corrugated cardboard for the top covering material by partially improving the conventional Cordate machine.

[Problem that the invention seeks to solve]

However, the Gakuru Cordate Machine is a method and apparatus for producing composite corrugated board with a top layer laminate, in which a composite liner is formed by laminating and integrating a top layer on the surface of base paper and is directly adhered to the core.

In recent years, due to the diversification of the preferences of m-people, orders for laminate corrugated cardboard for the overlay have become narrower.

For example, when the covering material is a film, orders are divided into smaller pieces depending on the material, thickness, color, etc. of the film, so it is necessary to accommodate this. If a normal-sized corrugated board factory were to respond to such orders, the liner base paper for the top laminate would have to be replaced many times in a day on a single cordate machine. A problem has arisen in which the manufacturing efficiency of Furthermore, since the top liner base paper is made by laminating the top liner onto the base paper, it becomes thicker and bulkier, resulting in the problem that the top liner roll has to be replaced more frequently.

In view of the actual situation associated with the production of laminated corrugated board for top covering material as described above, the present invention provides separate rolls of base paper and top material for each of the single facer section and the double facer section, and each roll of base paper and top covering material is provided separately. It is an object of the present invention to provide a method and apparatus for producing a laminate of a top covering material in which the top material roll is permanently installed and only the top material roll is replaced according to demand.

[Means for solving problems]

The structure of the method of the present invention to achieve the above object is such that at least one of the front and back liners sandwiching the core is a composite liner in which a top liner is laminated on the surface of base paper. Before the liner adheres to the core, the heat-adhesive resin layer covering the surface side of the base paper is heated and melted, and at the same time the overlay material is pressed onto the melted heat-adhesive resin layer. It is characterized by laminating the top material and liner base paper.

The apparatus of the present invention also provides a composite corrugated board manufacturing apparatus in which at least one of the front and back liners sandwiching the core is a composite liner in which a top layer is laminated on the surface of base paper, in which the composite liner is adhered to the core. In front of the device, a pressure roll is provided facing the heating roll, and a mill roll stand for liner base paper and a mill roll stand for overlay material are also provided. The gist is that the back side of the base paper coated with a heat-adhesive resin is brought into contact with the surface of the base paper, and the front side of the overlay material pulled out from a mill roll stand for overlay material is brought into contact with the crimped a-ru surface. That is.

Furthermore, the present invention provides an apparatus for producing composite corrugated board in which at least one of the front and back liners sandwiching the core is a composite liner in which a top layer is laminated on the surface of a base paper, and an apparatus in which the composite liner is bonded to the core. Beforehand, a pressure roll is provided facing the heating roll, and a device for coating the surface of the raw paper with a thermoadhesive resin layer is provided between the heating roll and the mill roll stand for liner base paper. Another feature is that the back side of the base paper coated with this thermoadhesive resin is brought into contact with the surface of the pressure roll, and the front side of the overlay material pulled out from the mill roll stand for overlay material is brought into contact with the pressure roll surface. It is something to do.

〔Example〕

Hereinafter, the present invention will be explained in detail based on the drawings.

Example-1 In Fig. 1, a core base paper 1a is attached to the single facer part S.
Mill roll stand 6 and thermo-adhesive resin laminate back liner I! 1. A heating roll 15 for laminating the mill roll stand 7 of the paper 2a, the mill roll stand 8 of the covering material 3a, and the covering material 3a. Lamination 1 of crimp cooling roll I6
The double facer part includes a mill roll stand 9 for the front liner base paper 4a of thermoadhesive resin laminate, a mill roll stand 10 for the top covering material 5a, and a mill roll stand 10 for the top covering material 5a.
A heating roll 30 for laminating, a pressure cooling roll 31
It is equipped with a laminating device L2. A free belt 24 that circulates around the heat generating part 22 and slides on the hot plate 23 is provided at the double facer part.

As will be described later, the free belt 24 circulates as it moves through contact with the corrugated cardboard structure F2, but it may be auxiliary driven.

The illustrated laminate equipment faL+-t, 2 provided at the single facer part S and the group 7 facer part consists of a heating roll 15.30 and a pressure cooling roll 16.31,
A pressure cooling roll 16.31 is arranged opposite the top of the heating roll 15.30. The heating roll 15.30 is a roll that heats and melts the thermoadhesive resin layer coated on the surface side of the back liner base paper 2a and the front liner base paper 4a sent from the mill roll stand 7.9, and is made of iron to improve heat conduction. A large roll is provided, and a heating medium is passed through the inside of the roll and heated to about 180 to 200°C, and this heat melts the thermoadhesive resin layer through the base paper.

Crimp cooling roll 16.31 is mill roll stand 8.1
A small roll made of iron or rubber with cooling water passed through it is provided with a roll that presses and cools the overlay material 3 at 5 a fed from 0 to the melted thermoadhesive resin layer at the same time as melting. The top layer is treated with Teflon or silicone to make it easier to peel off. Of course, in this apparatus, the pressure roll and cooling roll L2 may be provided separately.

Next, regarding the corrugated board assembly process, in the single facer section S, the core raw paper 1a sent out from the mill roll stand 6 is fed between the corrugating rolls 11 and 12 and processed, and Starch glue is applied to the top by a glue roll 13. On the other hand, the back composite liner 2b sent out from the laminating device L1 is adhered to the corrugated top of the core 1a by a press roll 14, thereby forming a single-sided composite corrugated board F1.

In the single-sided composite corrugated board F1, starch paste is applied by a glue roll 18 to the other corrugated top of the core 1a before the ace part of the gupuru 7, and at the ace part of the gupuru 7, it is combined with the front composite liner 4b to form a corrugated board structure. - Corpse F2 is constructed.

The corrugated cardboard structure F2 runs on the heating section 22 by the driving of the cordating belt 26, but since the free belt 24 is placed on the hot plate 23 of the heating section 22, the upholstery material 4b runs on the heating section 22. The corrugated cardboard structure F2 comes into contact with the free belt 24 and follows the free belt 24 due to the frictional force therebetween. The covering material 4b does not rub against the free belt 24, and even if it comes into close contact with the free belt while running on the heating section 22, it receives heat indirectly from the heating section 22, so it does not melt and the cardboard While passing over the heating section 22, the structure F2 receives the amount of heat required to gelatinize the starch paste, and the adhesion between the core 1a and the front composite liner 4b is completed. Finally, after being cooled by a cooling belt 27, it is cut by a cutter 28 to obtain a composite corrugated board of a certain size.

With the present invention, it is possible to produce single-sided corrugated board with a composite liner in which only the single facer side is operated and one side is laminated with a top layer, or it is also possible to manufacture one-sided corrugated board with a composite liner in which one side is laminated with a top layer and the other side is a composite liner with a top layer laminated on one side. Double-sided corrugated board with base paper liners can also be produced. The same can be said of multi-sided corrugated cardboard and multi-sided corrugated cardboard.

The heat-adhesive resin layer coated on the base paper in the present invention is a layer of a low-melting resin, such as polyvinyl acetate, polyvinyl chloride, polyethylene, polypropylene, or the like. These liners can be attached to base paper in the form of a film or applied as a hot-melt adhesive to form a layer that can be used as liner base paper. Preferably, a liner base paper in which a base paper is coated with a heat-adhesive film can be used. In the present invention, before the laminating device L + -L 2 that laminates the overlay material onto the liner base paper,
Apparatus for coating base paper with the thermoadhesive resin (Example-2)
) can also be used. The covering material to be laminated on this thermoadhesive resin layer is not particularly limited depending on recent demands or uses, but includes, for example, plastic film, plastic sheet, plastic 7 ohm sheet, plastic cloth + 17 thermal film,
Plastic materials such as stretched film and aluminum vapor-deposited film, metal materials such as aluminum foil and electrolytic steel, and other synthetic leather, cloth, and nonwoven fabrics can be used.

Example 2 Figure 2 shows an example of an apparatus for forming a heat-adhesive resin layer on base paper. It is provided. The base paper sent out from the mill roll stand 7 passes through a feed roll 41 and is fed between a pressure roll 42 and a cooling roll 43. On the other hand, the heat-adhesive resin charged into the hotspot 44 is heated and melted by an extruder 45 and extruded into a film of a constant thickness through the slit of a T-die 46. The raw paper flows between the base paper and the cooling roll 43, is coated with the base paper, and is sent to the next laminating device L1.

〔Effect of the invention〕

As explained above, the present invention responds to the demand for overlay material and can be used immediately by laminating it on base paper, and since the mill roll stand for overlay material and base paper are provided separately, the roll itself is not bulky. This reduces the frequency of removal, resulting in extremely good production efficiency, and since the base paper for liner, which is the base material for various lining materials, is the same, it is extremely advantageous in terms of material storage and inventory management. Overall, this has the effect of lowering the cost of cardboard products.

The apparatus of the present invention can apply the overlay at the same time as the production of corrugated cardboard due to the consistency of the manufacturing process from materials to products in the flow process of the corrugated cardboard structure.

This method can be used by making slight improvements to the Cordate machine that produces ordinary corrugated cardboard, so the equipment investment is low and it can be widely provided.

[Brief explanation of drawings]

PIS Figure 1 and Figure 2 show one embodiment of the present invention, Figure 1 is an explanatory diagram showing the outline of the device of the present invention, and Figure 2 is a vcr! FIG. 1 is an explanatory diagram showing an outline of a main part. S... Single facer part D... Double facer part, L2... Laminating device L3... Coating device for thermal adhesive resin 2a, '4a... Heat adhesive resin laminating base paper 3a,
5a... Top covering material 2b, 4b... Composite liner

Claims (1)

[Claims] 1) A method for manufacturing composite corrugated board, in which at least one of the front and back liners sandwiching the core is a composite liner in which a top layer is laminated on the surface of base paper, wherein the composite liner is adhered to the core. The overlay material and base paper for liner are bonded together by means of heating and melting the thermoadhesive resin layer covering the surface side of the base paper and simultaneously pressing the overlay material onto the melted thermoadhesive resin layer. A method for producing a composite corrugated board characterized by laminating the above. 2) The manufacturing method according to claim 1, characterized in that a cooling means is provided in addition to crimping. 3) In an apparatus for producing composite corrugated board, in which at least one of the front and back liners sandwiching the core is a composite liner in which a top layer is laminated on the surface of base paper, before the device in which the composite liner is bonded to the core, A pressure roll is provided opposite to the heating roll, and a mill roll stand for liner base paper and a mill roll stand for overlay material are also provided, and a thermal adhesive resin drawn out from the mill roll stand for liner base paper is placed on the surface of the heating roll. An apparatus for manufacturing composite corrugated board, characterized in that the back side of the base paper coated with the above is brought into contact with the surface of the crimping roll, and the front side of the overlay material pulled out from a mill roll stand for the overlay material is brought into contact with the surface of the pressure roll. 4) The manufacturing apparatus according to claim 3, wherein the pressure roll also serves for cooling. 5) In an apparatus for producing composite corrugated board, in which at least one of the front and back liners sandwiching the core is a composite liner in which a top layer is laminated on the surface of base paper, before the device in which the composite liner is bonded to the core, A pressure roll is provided facing the heating roll, and a device for coating the surface of the base paper with a thermally adhesive resin layer is provided between the heating roll and a mill roll stand for liner base paper, and this thermal adhesive is applied to the surface of the heating roll. Manufacturing a composite corrugated board characterized in that the back side of base paper coated with a synthetic resin is brought into contact with the surface of the crimping roll, and the front side of an overlay material pulled out from a mill roll stand for overlay material is brought into contact with the pressure roll surface. Device. 6) The manufacturing apparatus according to claim 5, wherein the apparatus for coating the surface of the base paper with the heat-adhesive resin layer is an extrusion apparatus for heat-melting film. 7) The manufacturing apparatus according to claim 5 or 6, wherein the pressure roll also serves for cooling.