JPH06234173A - Hollow sheet - Google Patents

Abstract

PURPOSE:To minimize degradation of overall function even when there is partial damage in surface layer sheets. CONSTITUTION:An air layer R between surface layer sheets 11, 11 is partitioned into only a large number of independent air chambers R1, R1... through a separator 20 and communicated parts are eliminated. Even when the surface layer sheets 11, 11 are damaged and rainwater infiltrates, other parts than the air chambers R1 being damaged will not be influenced by that.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow resin sheet which has an independent air chamber inside and is used for packaging, cushioning, waterproofing, heat insulation and the like.

[0002]

2. Description of the Related Art A so-called bubble sheet is widely known which has an air layer between surface sheets made of a resin material and has a waterproof and moisture-proof function by the resin material and a buffer and heat insulating function by the air layer. There is.

[0003] Generally, an air bubble sheet is formed by sandwiching an intermediate sheet in which a large number of convex portions are arranged in order between a pair of front and back surface layer sheets and adhering them together to form an air layer corresponding to the height of the convex portions. Therefore, the air layer is divided by a large number of independent air chambers defined by one surface layer sheet and the inside of the convex portion, and the other surface layer sheet and the outside of the convex portion to form air bubbles. It is formed of an air chamber that communicates with the entire seat.

[0004]

According to such a prior art, the air bubble sheet has, in addition to the independent air chambers, the air chambers that communicate with each other by sewing between the independent air chambers. In case of partial damage, rainwater,
When entering the air chamber where cold air, warm air, etc. communicate, the heat insulation effect of the whole is significantly reduced, and once the rainwater once invades, it does not easily flow out to the outside, so there was a problem that water leaked out for a long time. .

Therefore, an object of the present invention is to form an air layer between a pair of surface layer sheets from only independent air chambers, so that even if the surface layer sheet is partially damaged, invading rainwater or the like can be prevented. It is an object of the present invention to provide a hollow sheet that can maintain the initial heat insulating function for a long period without affecting the entire sheet.

[0006]

The structure of the present invention for achieving the above object is such that an air layer is formed between a pair of front and back surface sheets via a separator, and the separator has an independent air layer. The main point is to divide only the air chamber.

The separator can be formed by joining band-shaped members intermittently.

The separator can also be formed by connecting and collecting loop-shaped members.

Further, the separator can be formed by stacking a pair of planar members in which convex portions are arranged in a row at a constant pitch in the opposite direction.

[0010]

According to the structure of the invention, since the air layer between the surface layers is entirely divided into the independent air chambers by the separator, even if rainwater or the like enters due to damage of the surface layer, The effect only extends to the air chamber at the corresponding location, and does not affect the entire hollow sheet.

In the separator formed by intermittently joining the strip-shaped members, the air gap formed between the adjacent strip-shaped members is sandwiched by the surface layer sheets from above and below to form an air layer consisting of independent air chambers. it can.

Further, the separator formed of the loop-shaped member is such that an air space inside each loop-shaped member and a space formed between a plurality of loop-shaped members are sandwiched by the surface-layer sheets, so that an independent air chamber is provided between the surface-layer sheets. An air layer consisting of only can be formed.

Further, in the separator made of a planar member in which the convex portions are arranged in rows, the planar members are superposed in the opposite direction with the convex portion side being the inner side, so that the gap between the convex portions is convex to the other convex portion. Since it can be divided into parts, by sandwiching this between the surface layer sheets, it is possible to similarly form an air layer consisting of independent air chambers.

[0014]

Embodiments Embodiments will be described below with reference to the drawings.

The hollow sheet is a pair of surface layer sheets 11 and 1.
A separator 20 is interposed between the two and the whole is formed in a sheet shape (FIG. 1).

Each surface layer sheet 11 is a highly flexible, water-impermeable, air-impermeable resin sheet member, and its surface is finished to be smooth. In addition, the separator 20
Are also formed of the same kind of resin material.

The separator 20 is an assembly of a large number of strip-shaped members 21, 21 ... Of the same shape. Each strip 21 is
The members are alternately and regularly bent to form a zigzag bending member as a whole. Many strip-shaped members 21, 21 ...
Are arranged side by side so that adjacent pairs are symmetrical to each other, and in this state, they are joined together by intermittently joining the closely contacting portions. Therefore, a large number of independent air chambers R1, R1 ... Opened up and down are defined between adjacent pairs of strip-shaped members 21, 21 by portions that are not in close contact with each other.

The pair of surface layer sheets 11 and 11 are arranged such that the separator 20 is sandwiched between the strip-shaped members 21 and 2.
It is adhered to the upper and lower end faces of 1. Therefore, an air layer R composed of a set of air chambers R1, R1 ... Can be formed between the surface layer sheets 11, 11 (FIG. 2). At this time, the thickness of the air layer R is the band-shaped member 21, It is equivalent to the width d of 21 ... The upper and lower sides of each air chamber R1 are closed by the surface layer sheets 11, 11 to form a completely airtight chamber.

Such a hollow sheet can exert excellent moisture-proof and heat-insulating functions by interposing it between the exterior material B1 and the interior material B2 of a building, for example (FIG. 2).

The air layer R between the surface layer sheets 11, 11 is an independent air chamber R 1, R divided by the separator 20.
Even if the nail N1 is used for the construction, the effect of the surface layers 11, 11 being broken by the nail N1 affects only the corresponding air chamber R1 and the other air chamber R1.
, R1 ... Therefore, the deterioration of the function of the hollow sheet as a whole can be substantially ignored. This is also the case when the surface layer sheets 11, 11 are partially damaged due to other causes.

As long as the separator 20 can form the independent air chambers R1, R1 ...
The bent form of 1, 21, ... Can be arbitrarily changed (FIGS. 3A to 3C). Further, the belt-shaped member 21
May be a combination of a belt-shaped member 21a that bends and a linear belt-shaped member 21b that does not bend (FIGS. 4A to 4C). However, in FIGS. 3 and 4, the black circle points are
Adjacent strip-shaped members 21, 21 or strip-shaped members 21a, 2
The joining position of 1b is shown. In any case, the belt-shaped member 2
Each of 1, 21a and 21b can be easily produced by cutting a corrugated plate-shaped or flat plate-shaped sheet material into the same width. Further, the entire thickness of the hollow sheet can be freely adjusted by changing the width d of the belt-shaped members 21, 21a, 21b.

[0022]

Other Embodiments The separator 20 can be formed by connecting endless loop-shaped members 22, 22 ... (FIG. 5). Each loop-shaped member 22 is formed in a low cylindrical shape,
A large number of loop-shaped members 22, 22, ... Are arranged so as to be connected vertically and horizontally on the same plane, and are integrated by partially joining the outer peripheral portions that are in contact with each other. Such a separator 20 is sandwiched between the surface layer sheets 11 and 11 to form the surface layer sheet 1.
An air layer R corresponding to the height of the loop-shaped members 22, 22 ... Can be formed between 1 and 11. Further, the air layer R at this time includes the independent air chambers R1, R1 ... Formed inside each loop-shaped member 22 and the plurality of loop-shaped members 22, 22.
Can be divided into independent air chambers R2, R2 ,.

Each loop-shaped member 22 is endless and is not limited to a cylindrical shape as long as it is connected to each other to form a flat surface. For example, a polygonal shape or an irregular shape is also used. It is possible to form the air chambers R1 and R2 inside and outside thereof. In addition, each loop-shaped member 22
Do not have to be the same size. Such a separator 20 can be formed all at once by, for example, stacking a plurality of pipes to be the loop-shaped members 22, 22, ... And joining the outer peripheries, and cutting this to a required width.

The separator 20 has a large number of protrusions 23a, 2
A pair of planar members 23, 23 in which 3a ...
Can be formed by overlapping in the opposite direction (FIG. 6). Each convex portion 23a is formed so as to push out a part of the planar member 23, and the inside is hollow. Also,
The convex portions 23a, 23a ... Are formed vertically and horizontally only on one surface side of the planar member 23, and the pitch thereof is, for example, one convex portion 23a in the middle of the four convex portions 23a, 23a.
Is set to be inscribed accurately.

The pair of planar members 23, 23 has a convex portion 23.
.. are directed inward, and the separators 20 are formed by superposing them on top of each other. However, the pair of planar members 23, 23 are combined by shifting by a half pitch so that the one convex portion 23a, 23a ... Corresponds to the intermediate position of the other convex portion 23a, 23a.

Such a separator 20 can form an air layer R between the pair of surface layer sheets 11, 11 which is substantially equivalent to the height of the convex portions 23a, 23a ... (FIG. 7).
The air layer R at this time is composed of independent air chambers R1, R1, ..., R.
2, R2 ... (Fig. 8). That is, between the surface sheet 11 on one side and the planar member 23, the convex portions 2 are formed.
An independent air chamber R1 is formed in 3a (FIG. 7), and an independent air chamber R1 is similarly formed between the other surface layer sheet 11 and the planar member 23. Here, the upper and lower air chambers R1,
The relationship of R1 ... is such that one of the four air chambers R1 and R
The other air chamber R1 (two-dot chain line in FIG. 8) enters in the middle of 1 ... (solid line in FIG. 8).
Separate air chambers R2, R2 ... Are separately formed outside the upper and lower air chambers R1, R1.

The convex portion 23 formed on each planar member 23
The a, 23a ... May have any shape as long as the convex portions 23a can be connected to each other when the convex portions 23a, 23a. For example, when the planar members 23, 23 having the elliptical convex portions 23a, 23a ... Are combined, the convex portion 23 of one planar member 23 is combined.
a, 23a ... The space between the projections 2 of the other planar member 23.
It is possible to divide by 3a, 23a ... (FIG. 9) and form new independent air chambers R2, R2 ... Between them, and by sandwiching the superposed ones between the surface sheets 11 and 11, Independent air chambers R1, R1, ..., R2,
It can be divided into R2 ... The convex portions 23a, 23a, ... Formed on the pair of planar members 23, 23 are not the same in shape or size for each planar member 23 or in one planar member 23. (FIG. 10).

In the above description, the hollow sheet can be further laminated in two or more layers to form a multi-layer, and an air layer R having an arbitrary thickness can be realized as a whole. In addition, the separator 20 including the planar members 23, 23
The separator 20 itself can be laminated in multiple layers.

Such a hollow sheet is used as a heat insulating material for the outer wall of a building (FIG. 2), and is also embedded in concrete such as a floor or a wall to exert a waterproof / heat insulating function, or a tent for camping, It can be effectively used as a rug or sleeping bag. This is because it is extremely lightweight as a whole and can be folded into a small size. Also, its flexibility,
Utilizing its cushioning properties, it is effective as a packaging material, and since it does not lose buoyancy easily, it is also suitable as a material for manufacturing marine leisure equipment such as life bags and life boats, as well as floating bags and swimming mats. is there.

[0030]

As described above, according to the present invention, a surface layer sheet can be formed by interposing a separator for partitioning an air layer between the surface layer sheets into independent air chambers between the pair of surface layer sheets. Even if rainwater or the like partially invades, the effect will not extend to the air chamber at the corresponding location and will not spread to the entire air layer. There is no effect, and there is an excellent effect that the initial performance can be maintained for a long time.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the entire structure

[Figure 2] Usage status explanatory diagram

FIG. 3 is a schematic structural diagram (1) showing another embodiment.

FIG. 4 is a schematic structural diagram (2) showing another embodiment.

FIG. 5 is an explanatory perspective view of a main part showing another embodiment.

FIG. 6 is an exploded perspective view showing another embodiment.

7 is a cross-sectional view taken along the line XX of FIG.

FIG. 8 is an explanatory plan view of an essential part of FIG.

FIG. 9 is a view corresponding to FIG. 8 showing another embodiment.

FIG. 10 is a schematic structural diagram (3) showing another embodiment.

[Explanation of symbols]

 R ... Air layer R1, R2 ... Air chamber 11 ... Surface layer sheet 20 ... Separator 21, 21a, 21b ... Strip member 22 ... Loop member 23 ... Sheet member 23a ... Convex portion

Claims (4)

[Claims] 1. A hollow sheet, wherein an air layer is formed between a pair of front and back surface sheets via a separator, and the separator divides the air layer into independent air chambers. 2. The hollow sheet according to claim 1, wherein the separator is formed by intermittently joining strip-shaped members. 3. The hollow sheet according to claim 1, wherein the separator is formed by connecting and collecting loop-shaped members. 4. The hollow sheet according to claim 1, wherein the separator is formed by stacking a pair of planar members in which convex portions are arranged in a row at a constant pitch in an opposite direction.