JPH03278943A - Honeycomb structure and preparation thereof - Google Patents

Abstract

PURPOSE:To enhance the workability and improve the yield of cutting by forming a honeycomb structure from a planar aggregate of hollow columnar cells subjected to stretch molding and bonding the cell walls made of a polyvinyl chloride forming the cells by an adhesive based on a resin having an m.p. lower than the softening temp. of polyvinyl chloride. CONSTITUTION:An adhesive 8 comprised mainly of a resin having an m.p. lower than the softening temp. of polyvinyl chloride is linearly applied to a polyvinyl chloride sheet 1 at a constant pitch in constant width in a predetermined direction. The polyvinyl chloride sheet coated with the adhesive 8 to be dried is cut into predetermined length and a large number of the cut sheets are stacked in a block state in positional relation such that the lines of the adhesive 8 are shifted by a half pitch and pressed in the stacking direction at the m.p. temp. of the adhesive to be bonded. Next, the stacked and bonded polyvinyl chloride sheets are stretched by the tensile force applied in the stacking direction. The honeycomb structure A thus formed is composed of a planar aggregate of hollow columnar cells subjected to stretch molding and the cell walls C thereof made of polyvinyl chloride are bonded by the adhesive 8.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method for manufacturing a honeycomb structure and a honeycomb structure. That is, the present invention relates to a honeycomb structure made of vinyl chloride that is formed by an expansion method and is widely used for structural materials, flow straightening materials, and lot number applications, and a method for manufacturing the same.

"Prior Art" FIG. 5 is a process schematic explanatory diagram for explaining a method of manufacturing a honeycomb structure made of vinyl chloride of this kind according to a conventional example.

The conventional example will be explained with reference to the figure. First, in the coating process, an adhesive (not shown) is applied to the vinyl chloride sheet 1. That is, in the coating process, first, the supply roll 2
An adhesive made of a solvent component is applied linearly in the longitudinal direction of the vinyl chloride sheet 1, which is a base material, by a coating roll 3 at a constant pitch and a constant width to one side of the vinyl chloride sheet 1 supplied from the base material. Thereafter, this vinyl chloride sheet 1 is fed from another supply roll 5 and is coated with another base material, the vinyl chloride sheet 1, which is not coated with adhesive, on the pressure roll 4, and one side coated with adhesive is placed on the pressure roll 4. It is crimped. Then apply coating roll 6 to the other side of vinyl chloride sheet 1.
As a result, the adhesive made of a solvent component is applied linearly in the longitudinal direction at the same pitch and width, with a positional relationship shifted by a half pitch from the adhesive applied to one side as described above.

Next, in the stacking and bonding step, such vinyl chloride sheets 1 are immediately wound up, stacked, and bonded. In other words, in the piling adhesion process, the extremely thin vinyl chloride sheet 1 serving as the base material is immediately wound onto the winding drum 7 and piled up into a roll before the surface is melted by the solvent-based adhesive and dried. Laminated and glued.

After cutting it into predetermined lengths, it was expanded in a stretching process to form a honeycomb structure (not shown). That is, the vinyl chloride sheets 1, which are base materials stacked and bonded in a roll shape as described above, are first cut into predetermined lengths, and a plurality of sheets are stacked and bonded to form blocks such as rectangles. Then, in the stretching process, a tensile force is applied and the material is expanded to form a vinyl chloride honeycomb structure.

[Problems to be Solved by the Invention] The following problems have been pointed out in such conventional examples.

First, as the adhesive for the vinyl chloride sheet 1, which is the base material, a solvent-based adhesive has been used.

Therefore, if the vinyl chloride sheet 1 whose surface has been melted by the coating process is dried and hardened once, it will become impossible to bond afterwards, so it is necessary to immediately wind it up into a roll before it dries.

Therefore, in the layered bonding process, it was pointed out that the workability was poor because the adhesive was bonded in a roll immediately after application.

Second, there was a problem in that the size of the honeycomb structure to be molded was limited. That is, since the vinyl chloride sheet 1 serving as the base material is wound up into a roll in the stacked adhesion process, the adhesive was applied only in the longitudinal direction and not in the width direction in the prior application process. Therefore, the width of the vinyl chloride sheet 1 is naturally restricted, making it difficult to form a large-sized honeycomb structure.

Thirdly, there was also the problem that the yield of the base material during cutting was poor. That is, the vinyl chloride sheet 1, which is a base material that is stacked and bonded in a roll shape in the stacking and bonding process, is cut into predetermined lengths and made into blocks such as rectangles. Since the material is cut into equal blocks, a large amount of unused and discarded parts are generated at the cut end due to the pi ratio, resulting in poor cutting yield.

Fourth, since a solvent component is used as the adhesive, there is a problem in that the environment is polluted, such as a bad odor wafting around the work site.

This point was pointed out in the conventional example.

In view of these circumstances, the present invention was made to solve the problems of the conventional methods described above, and by using an adhesive mainly composed of a low-melting point resin, workability is improved. The purpose of the present invention is to propose a vinyl chloride honeycomb structure and a method for manufacturing the same, which have a high quality, no size limitations, a good yield when cutting, and no risk of environmental pollution.

"Means for Solving the Problem" The technical means of the present invention to achieve this object are as follows.

First, claim 1 is as follows. That is, this method for manufacturing a honeycomb structure includes a coating process, a double layering process, an adhesion process, and a stretching process.

First, in the coating process, an adhesive whose main component is a resin having a melting point lower than the softening temperature of vinyl chloride is applied linearly in a predetermined direction at a constant pitch and width to a vinyl chloride sheet.

In the piling process, the vinyl chloride sheets coated with the adhesive and dried and cut into predetermined lengths are stacked into blocks with the adhesive being shifted by half a pitch. Intussusception.

In the bonding step, the stacked vinyl chloride sheets are bonded together by applying pressure in the stacking direction and heating at the melting point temperature of the adhesive.

In the stretching step, the vinyl chloride sheets stacked and bonded in this way are stretched by applying a tensile force in the stacking direction.

Claim 2 is as follows. This honeycomb structure consists of a planar assembly of hollow columnar cells that have been formed by expansion. The walls of the vinyl chloride cells forming the cell are bonded together with an adhesive whose main component is a resin whose melting point is lower than the softening temperature of vinyl chloride.

"Function" Since the present invention consists of such means, it works as follows.

First, in the manufacturing method of claim 1, there is a coating step.

A vinyl chloride honeycomb structure is manufactured through a stacking process, adhesion process, and expansion process. That is, vinyl chloride sheets coated with an adhesive mainly composed of a resin with a low melting point are dried and cut, stacked in blocks, bonded by pressure and heat, and then stretched to obtain a honeycomb structure. It will be done. The honeycomb structure according to claim 2 is manufactured in this way, and the cell walls are bonded together using an adhesive containing a low melting point resin as a main component.

So the following is true.

First, in the piling process, the applied adhesive is dried and then the vinyl chloride sheets are cut and stacked. In other words, since it is not necessary to once wind up the honeycomb structure into a roll, manufacturing of the honeycomb structure is facilitated.

Secondly, in the coating process, the adhesive can be applied even in the width direction of the vinyl chloride sheet since there is no need to wind it up into a roll afterward. In other words, the width is not restricted, and honeycomb structures can be manufactured without size restrictions.

Thirdly, in the stacking process, the vinyl chloride sheets are stacked after cutting, rather than being cut after being rolled up into a roll. Therefore, no unused and discarded parts are generated at the ends, which are the cut points, and the honeycomb structure can be manufactured with a high yield.

Fourthly, adhesives that are mainly composed of low-melting resins do not generate bad odors.

"Example" The present invention will be described in detail below based on the example shown in the drawings.

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are perspective views for explaining embodiments of a manufacturing method and a honeycomb structure according to the present invention. First, regarding the manufacturing method, the coating process is a single stacking process,
The bonding process and the stretching process will be explained in this order, and then the honeycomb structure will be explained.

The coating process is as follows.

Figures 1 and 2 are used to explain the coating process, with Figure 1 showing the prepared vinyl chloride sheet 1, and Figure 2 showing the vinyl chloride sheet 1 coated with the adhesive 8.

In the coating process, an adhesive 8 whose main component is a resin whose melting point is lower than the softening temperature of vinyl chloride is applied to the vinyl chloride sheet 1 linearly in a predetermined direction at a constant pitch and width.
is applied.

To explain these in detail, first, the vinyl chloride sheet l, which is the base material, is made of an extremely thin film-like flexible material with a wall thickness of about 60 to 80 microns, and has a softening temperature of about 65 to 70 degrees. In the illustrated example, a roll is used while being rewound into a sheet. Next, glue 8
Those whose main component is a low melting point resin used as
First, its melting point is about 60 degrees, which is lower than the softening temperature of the vinyl chloride sheet 1, and unlike the solvent components commonly used in the past, even if it hardens, it can be bonded by heating again afterward to melt it. It becomes possible. In addition, the adhesive 8 whose main component is such a low-melting-point resin is in a normal state, for example, in a biocompatible state, and is used as the adhesive 8 after being melted with a solvent to a coatable state. This adhesive 8 has the property of drying within a short time.

In the coating process, the adhesive 8 mainly composed of such a low melting point resin is applied to the surface of the vinyl chloride sheet 1 as a base material in a predetermined direction, that is, in the illustrated example, in the width direction thereof, in large numbers.
It is applied linearly in stripes at a constant pitch and width at predetermined intervals.

Of course, the coating may be applied in the longitudinal direction of the vinyl chloride sheet 1, not according to the illustrated example.

The coating process is as follows.

Next, the stacking process will be described.

FIG. 3 shows stacked vinyl chloride sheets 1 for explaining the stacking process.

In the stacking process, the vinyl chloride sheets 1 coated with the adhesive 8, dried, and cut into predetermined lengths are stacked into a plurality of blocks with the adhesive 8 shifted in position by half a pitch. Intussusception.

That is, since the adhesive 8 applied in the above-mentioned application process dries in a very short time, after drying, the vinyl chloride sheet 1 is cut along the width direction into predetermined lengths in the longitudinal direction. A plurality of vinyl chloride sheets 1 having the same length and the same size are stacked one on top of the other to form a block shape such as a rectangle. Note that during this stacking, each vinyl chloride sheet 1 is positioned so that the adhesive 8 applied linearly at a constant pitch is shifted by a half pitch between the adjacent upper and lower vinyl chloride sheets 1.

The stacking process is like this.

Next, the adhesion process will be described.

In the adhesion process, the stacked vinyl chloride sheets 1 are pressed in the stacking direction and heated at the melting point temperature of the adhesive 8 to be bonded.

That is, the vinyl chloride sheets 1 stacked in the above-mentioned stacking process are pressurized in this bonding process from the stacking direction, that is, from the top and bottom directions in the illustrated example, and are coated with an adhesive mainly composed of a low melting point resin. By heating at about 60 degrees, which is the melting point temperature of No. 8, the upper and lower blocks forming a block are bonded together. Note that the vinyl chloride sheet 1 has a softening temperature of about 65 to 70 degrees, which is higher than the melting point temperature of the adhesive 8, so it is not affected by such heating of about 60 degrees.

The bonding process is as follows.

Next, we will discuss the expansion process.

In the stretching step, the vinyl chloride sheets 1 stacked and bonded in this way are stretched by applying a tensile force in the stacking direction.

FIG. 4 shows a stretched honeycomb structure A for explaining the stretching process. That is, the above-mentioned intussusception process.

The block-shaped vinyl chloride sheets 1 that are stacked and bonded in the bonding process are stretched by applying a tensile force in the stacking direction, that is, in the illustrated example, in the vertical direction, and the honeycomb structure A shown in FIG. 4 is formed. .

The expansion process is as follows.

Next, the honeycomb structure A will be described.

This manufacturing method, that is, the coating process.

By following the stacking process, adhesion process, and expansion process, the fourth
The honeycomb structure A shown in the figure is manufactured.

A honeycomb structure A made of vinyl chloride is made of a planar aggregate of hollow columnar cells B that are stretched and formed.
The vinyl chloride cell walls C forming the vinyl chloride are bonded together with an adhesive 8 whose main component is a resin whose melting point is lower than the softening temperature of vinyl chloride. That is, the honeycomb structure A consists of a planar assembly of a large number of hollow columnar cells B, such as regular hexagons, for example. The cell walls C forming the cell B are made of the vinyl chloride sheet 1 stretched as described above, and between the cell walls C, that is, between the vinyl chloride sheets 1, a predetermined low melting point resin is used as the main component. adhesive 8
It is glued by. Note that the honeycomb structure A is known for its excellent strength-to-weight ratio, light weight, high rigidity and strength, excellent fluid rectification effect, easy molding, and excellent cost.

The honeycomb structure A is like this.

The manufacturing method for a honeycomb structure and the honeycomb structure A according to the present invention are as described above. Therefore, it becomes as follows.

In this manufacturing method, there is a double application process and a double stacking process.

A vinyl chloride honeycomb structure A is manufactured by following the adhesion process and the stretching process. That is, first, a vinyl chloride sheet 1 is coated with an adhesive 8 mainly composed of a low melting point resin in a predetermined manner, is dried and cut, stacked in a block shape at a predetermined position, and is melted and hardened by pressure heating. After being bonded with the adhesive 8, it is expanded to obtain the honeycomb structure A. And honeycomb structure A is
Manufactured in this way, the cell walls C are bonded together with an adhesive 8 mainly composed of a low melting point resin.

Now, in the method for manufacturing the honeycomb structure A of vinyl chloride and the honeycomb structure A, the following first method is used.
．． Second. Third. It will be like the fourth one.

First, in the piling process, after the applied adhesive 8 has dried, the vinyl chloride sheet 1 serving as the base material is cut and stacked. In other words, there is no need to wind it up into a roll, etc.
Manufacturing of the honeycomb structure A is facilitated.

Secondly, in the coating process, since there is no possibility of winding up into a roll afterward, the adhesive 8 can also be applied in the width direction of the vinyl chloride sheet 1 serving as the base material. In other words, the width of the vinyl chloride sheet 1 serving as the base material is not restricted, and this honeycomb structure A can be manufactured without any particular size restriction.

Thirdly, in the piling process, the vinyl chloride sheets 1, which are base materials, are cut into predetermined lengths in advance and are then stacked. That is, they are not wound up into rolls in advance, stacked, and then cut. Therefore, no unused and discarded portions are generated at the ends, which are the cut points, and this honeycomb structure A can be manufactured with a high yield.

Fourthly, the adhesive 8 that is mainly composed of a low melting point resin does not generate any bad odor or the like, unlike the adhesive that is a solvent component.

"Effects of the Invention" As explained above, the method for manufacturing a vinyl chloride honeycomb structure and the honeycomb structure according to the present invention are as follows: Demonstrates the effect of

First, this honeycomb structure improves workability during manufacturing. In other words, in the manufacturing process, the vinyl chloride sheets that serve as the base material are cut and piled up after the applied adhesive has dried, and there is no need to wind up the base material into a roll, making the work easy. Loss is low.

Secondly, this honeycomb structure has no size limitations. That is, in the manufacturing process, the adhesive can also be applied in the width direction of the vinyl chloride sheet that is the base material, so the width is not restricted and large-sized products can be easily manufactured.

Thirdly, this honeycomb structure has a high yield rate due to cutting during manufacturing. In other words, in the manufacturing process, the vinyl chloride sheet that is the base material is not first wound into a roll and stacked, then cut, but is cut and then stacked, so that there is no damage at the edges where it is cut. There is no unused waste, and the cutting yield is high.

Fourthly, adhesives that are mainly composed of low melting point resins do not generate bad odors or the like and are not likely to pollute the environment, unlike adhesives that use solvent components.

In this way, the problems that existed in this type of conventional example are completely eliminated, and the effects of the present invention are remarkable and great.

[Brief explanation of drawings]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are perspective views for explaining a method for manufacturing a honeycomb structure and an embodiment of the honeycomb structure according to the present invention. 1 and 2 are used to explain the coating process, and FIG. 1 shows a prepared vinyl chloride sheet, and FIG. 2 shows a vinyl chloride sheet coated with an adhesive. FIG. 3 provides an explanation of the stacking process and shows stacked vinyl chloride sheets. FIG. 4 provides an explanation of the stretching process and shows the stretched honeycomb structure. FIG. 5 is a process schematic explanatory diagram for explaining a conventional manufacturing method. 1... Vinyl chloride sheet 2... 3... 4... 5... 6... 7... 8... A... B... C... Supply roll Application roll Crimping roll Supply roll Application roll Winding red drum Adhesive honeycomb structure Cell Cell wall Diagram Diagram

Claims (2)

[Claims] (1) A coating process in which an adhesive whose main component is a resin whose melting point is lower than the softening temperature of vinyl chloride is applied linearly in a predetermined direction at a constant pitch and width to a vinyl chloride sheet; A piling step in which a plurality of vinyl chloride sheets coated with the adhesive, dried, and cut into predetermined lengths are piled up in a block shape with the adhesive shifted by half a pitch. and an adhesion step in which the stacked vinyl chloride sheets are bonded by applying pressure in the stacking direction and heating at the melting point temperature of the adhesive, and the vinyl chloride sheets stacked and bonded in this way are bonded together. A method for manufacturing a honeycomb structure, comprising: a stretching step of applying a tensile force in the stacking direction to expand the body; (2) A honeycomb structure consisting of a planar aggregate of hollow columnar cells formed by expansion molding, and between the cell walls made of vinyl chloride forming the cells, resin having a melting point lower than the softening temperature of vinyl chloride is used. A honeycomb structure characterized by being bonded with an adhesive containing as a main component.