JPH01286833A - Self-extensible honeycomb structural body - Google Patents

Abstract

PURPOSE:To constitute the present structural body so that it maintains a folded type form at the time of circulation and is free from restoring shrink properties after extension at the time of filling into a flush panel, by a method wherein a flexible beltlike web is comprised of a heat-shrinkable material shrinking according to a fixed temperature rise and a nonheat-shrinkable material not shrinking. CONSTITUTION:A honeycomb structural body 10 is formed by laminating flexible beltlike webs 11, 13, 15, 17 and beltlike wevs 12, 14, 16, 18 and sticking them toegther with an adhesive agent lines which are provided at fixed intervals. When the honeycomb structural body 10 is heated with hot air of about 80-100 deg.C, the shrinkable webs 12, 14, 16, 18 are shrinked and their length are shortened. On the one hand, since the structural webs 11, 13, 15, 17 are formed of nonheat- shrinkable craft paper, they do not shrink practically. Therefore, the structural web is projected sideward by amount corresponding to that of contraction of the shrinkable web and self-extension is performed. With this construction, shipment is handled as a folded type and at the time of practical filling into a flush panel, self-extension becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a honeycomb structure, and more particularly to a self-expanding honeycomb structure that expands by increasing temperature.

(Prior Art) A honeycomb structure is formed by laminating a large number of flexible strip-shaped webs and bonding them to each other with an adhesive provided at appropriate intervals with a predetermined width. It is widely used as a core material for internal reinforcement of flush panels used for ceilings.

There are two types of honeycomb structures: a so-called folded honeycomb structure, which is shipped without widening the spacing between laminated and joined webs, that is, without expanding, and a so-called folded honeycomb structure, which is shipped with the spacing between the webs widened and fixed in a honeycomb-like form. There is a so-called fixed expansion type honeycomb structure that is shipped in a stretched state.

Foldable honeycomb structures are easy to manufacture and compact, making them excellent in terms of distribution such as transportation and storage, and the cutting process using a circular saw or gelatin is said to have good precision when manufacturing honeycomb structures. Although it has advantages, it also has disadvantages such as the dimensions change due to expansion, the work is complicated because the expansion is done manually, and it is unstable due to the tendency to restore and contract after expansion. had.

On the other hand, a fixed expansion type honeycomb structure has advantages in use in the final filling operation because it does not require expansion work when filling a flash panel etc. and has no recovery shrinkage. It is bulkier than the conventional method, making it difficult to achieve cutting accuracy, and it also has major drawbacks in terms of distribution, such as transportation and storage.

(Problems to be Solved by the Invention) In view of the problems with the prior art honeycomb structures as described above, the present invention provides a honeycomb structure that combines the advantages of the folding type honeycomb structure and the fixed expansion type honeycomb structure. He wants to donate his body.

In other words, it maintains the folded form during distribution such as cutting, shipping, transportation, and storage, and when filling flan tubes, etc., it can be easily and reliably expanded without manual effort, and furthermore, after the expansion. The object of the present invention is to provide a honeycomb structure that exhibits no restoration shrinkage and is capable of maintaining its expanded form.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention is formed by laminating a plurality of flexible strip-like webs at predetermined intervals and with adhesive strips of a predetermined width interposed therebetween. In the honeycomb structure,
The flexible belt-like web is composed of a heat-shrinkable material that shrinks when the temperature rises to a predetermined temperature, and a non-heat-shrinkable material that does not shrink when the temperature rises to the predetermined temperature.

(Function) As described above, the honeycomb structure of the present invention has a plurality of flexible belt-like webs constituting the honeycomb structure.
Since it is composed of heat-shrinkable and non-heat-shrinkable materials, it should be treated as a folded honeycomb structure until it is actually filled into a flash panel, etc. By heating this honeycomb structure before the actual filling operation, the heat-shrinkable strip web is shrunk. At this time, since the non-heat-shrinkable strip web does not substantially shrink, the external Due to the contraction force of the stimulated contractile strip webs, the honeycomb structure is forced to expand in the direction in which the strip webs are separated from each other. A self-expanding honeycomb structure is therefore provided.

(Example) FIG. 1 shows a honeycomb structure that is a first example of the present invention.

This honeycomb structure 10 includes flexible belt-like webs 11,
13, 15, 17 and also flexible strip web 12
, 14, 16. .

The strip webs 11, 13, 15, 17 are in this example webs that primarily contribute to the strength of the honeycomb structure, and from this point of view they will be referred to below as structural webs. Moreover, the belt-like webs 12, 14, 16.
18 is a web that contributes to expanding the honeycomb structure by shrinking; from this point of view, these webs 12, 14, 16, and 18 are hereinafter referred to as shrink webs.

The structural webs 11, 13, 15.17 are made of a non-heat-shrinkable material that does not substantially shrink due to increased temperature, while the shrinkable nibs 12, 14, 16.18 are made of a heat-shrinkable material that shrinks when the temperature rises to a predetermined temperature. Made from shrinkable material.

In this example, the structural web has a basis weight of 150 g/m
The shrink web is made from a 150 micron thick PVC film stretched approximately 50%.

The adhesive strip that joins each web has a predetermined width and extends in a direction perpendicular to the longitudinal axis of the strip web (in a direction substantially perpendicular to the plane of paper in the drawing). The adhesive strip a joins the structural web and the shrink web located below it (e.g. webs 11 and 12 or webs 17 and 18 in FIG. 1); structural webs (e.g. webs 12 and 13 or webs 17 and 1 in FIG. 1)
8) are joined. As shown in the figure, it is preferable to provide each adhesive strip so that it is located between each adhesive strip a.

Referring now to FIG. 2, the 7% bicam structure shown in FIG. 1 is shown in an expanded or expanded condition.

In this way, the folded type /1 nicomb structure shown in Fig. 1 can be made into the expanded type /1 niccomb structure shown in Fig. 2 by heating the honeycomb structure to a predetermined temperature. be exposed. That is, when the two-cam structure shown in FIG.
, 14, 16, and 18 contract and their lengths become shorter. On the other hand, the structural nibs 11.13, 15.17 are made of non-heat-shrinkable kraft paper, as described above, and therefore do not substantially shrink. Therefore, the structural web protrudes laterally (vertically in the plane of the paper in FIGS. 1 and 2) by an amount commensurate with the amount of shrinkage of the shrinkage web, thereby causing the honeycomb structure to self-expand.

Referring now to FIG. 3, a honeycomb structure is shown with a somewhat more patterned structure than in FIG.

This honeycomb structure 30 also consists of a plurality of structural webs, shrink webs and adhesive strips as defined in the embodiment of FIG. In this embodiment, between the two structural webs 21 and 23 or 25 and 27 one
It has a structure in which two shrink webs 22 or 26 are provided to form one web block 29 or 29', and these web blocks 29 and 29' are joined via one shrink web 24. Adhesive strips a' and b' are provided at substantially the same radius and spacing as in the example shown in FIG. 1 above, and as shown in FIG. On the other hand, the adhesive strip b'' serves to join these web blocks 29 and 29' via the shrink web 24. FIG. 4 shows the honeycomb structure shown in FIG. A honeycomb structure 30 is shown that has been self-expanded in the same manner as the honeycomb structure 30 that has been self-expanded.

In the embodiment shown in FIGS. 3 and 4, the web blocks were joined via the shrink web 24, but the shrink web 24 was omitted and the structural webs 23 and 25 were bonded with the adhesive shown in the figure. It is also possible to join directly at the position of the strip b'.

Next, a method for manufacturing the honeycomb structure shown in FIG. 1 will be explained.

The honeycomb structure shown in FIG. 1 is obtained by cutting the hope 50 shown in FIG. 5 into a predetermined width.

This hope 50 is connected to the structural web 11°13.1 in FIG.
Structural sheets 51, 53, 55. 57 corresponding to 5.17 and made of the same material as these webs, and shrinkable sheets 52, 54, 56° 58 made of the same material as the shrinkable webs 12, 14, 16° 18 in FIG. 1, respectively. and are laminated alternately, and these are bonded by adhesive strips A or B provided at conduits and intervals corresponding to adhesive strips a or b in FIG.

In this example, a structural sheet coated with adhesive strip B is sequentially stacked and bonded onto a shrink sheet coated with adhesive strip A, but only one of the shrink sheets or the structural sheet is coated with adhesive strips A and B. It is also possible to coat these sheets and bond them by stacking them alternately, and any method conventionally employed in manufacturing honeycomb structures can be used.

The /S nicum structure 10 shown in FIG. 1 is obtained by slicing the hope 50 formed by stacking and joining in this manner along the cutting line shown by the dashed line in FIG. 5. In this example, cutting is performed along the cutting line parallel to the longitudinal end of the hop, but depending on the use of the honeycomb structure, the hop may be cut at an angle to the longitudinal end of the hop, and both ends of the hop may be cut at an angle. It is also possible to produce a single comb structure with different heights in different sections.

The present invention is not limited to the above-described embodiments, but by changing the shape of the nicomb structure, the material of the web, etc., it is possible to provide a self-expanding nicomb structure suitable for various uses. Examples are listed below.

1. Cam structure for cooling towers or water treatment filters: unstretched PVC film (thickness 150μ) for the structural web
A 50% axially stretched PVC film (thickness 150 μm) is used as the shrink web, and self-stretching is carried out in hot water at 80 to 100°C.

2. Nicum structure for metal panels: Kraft paper (basis weight 80 g/m2) for the structural web, 50% stretched polypropylene film (thickness 3
0μ), and self-expansion is performed by irradiating far infrared rays (around 80°C) or by applying hot air at around 100°C.

3. Nicum structure for residential wooden panels: A structural web made of a wooden veneer (thickness Q, 5 IIlm) lined on one side with a non-woven fabric (50μ) (composite sheet), and a shrink web with aluminum powder dispersed in it. A 100% stretched PvC film (thickness: 150 μm) was used, and self-expansion was performed by placing the shrink web containing aluminum powder in an electromagnetic induction atmosphere to generate heat and shrink.

Note that it is highly economical to use a single piece of cardboard as the composite sheet.

4. Aluminum honeycomb structure: Aluminum foil (thickness 20μ) is used as the structural web, 50% stretched radiation irradiated polyethylene film or vinylidene chloride is used as the shrink web, and self-expansion is achieved by applying ultrasonic waves to the honeycomb structure. This is done by the web generating heat and the shrinkable web shrinking due to this heat.

5. Honeycomb structure for air filters: The structural web is a polyester nonwoven fabric (thickness 0.2+U+), the shrink web is a 30% stretched nylon nonwoven fabric (thickness 0.2mm), and self-expansion is carried out by hot air at 80°C to +20°C. This is done by guessing.

(Effects of the Invention) Since the present invention has the above-described configuration, it can be handled as a foldable type for shipping, transportation, or storage, and can be self-expanded by appropriate heating means when actually filling a flash panel etc. A honeycomb structure is provided.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a honeycomb structure of the present invention, FIG. 2 is a plan view showing the honeycomb structure of FIG. 1 in an expanded state, and FIG. 3 is a plan view of a honeycomb structure of another example of the present invention. FIG. 4 is a plan view similar to FIG. 2 showing the expanded state of the honeycomb structure shown in FIG. 3, and FIG. 5 is a plan view of the honeycomb structure shown in FIGS. 1 and 2. FIG. 3 is a perspective view showing a hope for manufacturing a structure. (Explanation of main symbols) 10.30: Honeycomb structure 11.13.15.17: Structural web 12.14.16, 18: Shrinkage web 21.23, 25, 27: Structural web 22.24, 26.28 : Shrinkage web 29.29' : Web bronok a, a', b, b', A, B: Adhesive strip 50: Hope. Patent applicant: Nippon Chushin Sales Co., Ltd.-2.

Claims (1)

[Claims] (1) In a honeycomb structure formed by laminating a plurality of flexible strip-like webs at predetermined intervals and with adhesive strips of a predetermined width interposed therebetween, the flexible strip-like webs are heated at a predetermined temperature rise. A honeycomb structure comprising a heat-shrinkable material that shrinks and a non-heat-shrinkable material that does not shrink when the predetermined temperature rises.