NL1015201C2 - Bulletproof construction element for buildings made from laminated paper or cardboard, contains pressure distributing material, preferably sand - Google Patents

Abstract

A pressure distributing material is incorporated into each paper or cardboard layer (5, 6). A building (1) for access by people comprises at least one construction element (2, 3) made from layers of paper or cardboard (5, 6), each layer comprising a pleated layer and a flat face layer. A pressure distributing material is incorporated into each paper or cardboard layer, designed to withstand pressure applied to a point in the layer, especially pressure resulting from a bullet striking it. An Independent claim is also included for a method of making the construction element.

Description

ACCESSIBLE BUILDING FOR PEOPLE WITH AT LEAST ONE CONSTRUCTION ELEMENT

The invention relates to a building accessible to persons comprising at least a construction element which is at least substantially made of layers of paper / cardboard, each layer being at least substantially formed by a corrugated partial layer and a, on one side thereof applied flat partial layer. The invention also refers to a method for manufacturing a construction element for such a building.

Such a building is known from European patent no. 0 965 700 from the same applicant. In the known building, a tubular construction element in the form of a cross section of the building is obtained by winding the paper / cardboard layers, wherein the wound layers are glued together by means of glue deposited on the corrugations of the corrugated partial layers. To enlarge the known building, use is made of various uniform construction elements of the aforementioned type, which are attached to each other via glue applied to their respective longitudinal edges. Optionally, a weather-resistant coating is applied, which is preferably also flame-resistant in order to make the known building optimally fire-safe.

30

The building known from the aforementioned European patent publication is, for example, particularly suitable for use as a (semi-permanent) housing for refugees in refugee areas or soldiers during peace missions. However, it has been found in practice that refugees and / or soldiers in such a case experience the known building as more or less unsafe niRom 2, in particular because it consists of (layers of) paper / cardboard and therefore appears to be vulnerable to external influences. .

It is the object of the invention to meet the feeling of insecurity outlined above, and for this purpose a building accessible to persons of the type mentioned in the preamble according to the invention has the special feature that in at least one paper / cardboard layer a pressure-distributing means, which pressure distributing means is able to withstand a point load, in particular due to a bullet impact. The pressure-distributing agent preferably consists of sand. This makes it possible in a simple and inexpensive manner to actually protect the building from dangerous external influences, which also makes it possible to use the building in dangerous situations and therefore increases its applicability.

20

In a preferred embodiment of a building according to the invention, the paper / cardboard layers are mutually connected via an adhesive applied to the corrugations of the corrugated partial layers. The pressure-distributing agent in the form of sand can then be elegantly poured into the 'cellular structure' of the corrugated board used,

In a further preferred embodiment of a building 30 according to the invention, the construction element comprises more than 10, in particular more than 20, more in particular more than 30, even more in particular more than 40 paper / cardboard layers. Not only does the construction element thereby obtain optimum strength, but the safety is also correspondingly increased, because optionally one or more layers can be filled with the sand as pressure-distributing agent.

101 5201 3

In a further preferred embodiment of a building according to the invention, the construction element is formed by a wall panel. The wall panel is preferably sealed along its edges, so that the pressure-distributing agent cannot leak out of the wall panel.

In a further preferred embodiment of a building according to the invention, the construction element 10 is tubular and at least substantially manufactured by winding the paper / cardboard layers. In particular, the construction element forms walls of a space in the building, in particular a cross section of the building. As a result, instead of building up a wall of the building with several wall panels, (a cross section of) the building is manufactured in one go.

In a further preferred embodiment of a building 20 according to the invention, the construction element is provided with a layer of rubber and / or aramid fibers, optionally of the type as known under the brand name 1 Kevlar1 or 'Twaron'. Surprisingly, it appears that the pressure-distributing properties of the construction element are considerably increased. In particular, a construction element thus made also appears to be able to withstand knife stabs, for example.

The invention is also related to a method for manufacturing a construction element for a building accessible to persons according to the invention, wherein layers of paper / cardboard, each comprising a corrugated partial layer and a flat partial layer applied on one side thereof, are mutually mutually 35, preferably via an adhesive applied to the corrugations of the corrugated partial layers, and wherein in at least one paper / cardboard layer a 1015201 4 pressure-distributing agent is applied which is able to withstand a point load in particular as a result of a bullet impact to resist.

The invention will be further elucidated on the basis of figures shown in a drawing with regard to preferred embodiments of the invention, wherein figure 1 schematically shows a perspective view of a building 10 according to the invention, in which two construction elements are adhered together in the shape of cross segments; Figure 2 shows a perspective view of a building panel according to the invention; and - figure 3 shows a detail of figure 1.

In figure 1 a building 1 is distinguished from two construction elements 2,3 each in the form of a transverse segment of the building, which construction elements 2,3 along their mutually facing longitudinal edges 4,4 'by inserting glue with each other are connected.

Each construction element is made from wound layers 5,6 ... of a strip of corrugated paper / cardboard. In particular, the construction elements 2,3 have a height 7 varying between 2.5 and 3.5 m, a width 8 between 3 and 5 m, and a length 9 varying between 1.20 and 2.4 meters. Each construction element has a thickness d of 6 to 10 cm, which corresponds to 25 ë. 40 turns. The facades or the upright walls at the cross-ends of the building 1 are separately manufactured from paper / cardboard, metal or wood and are connected, for example glued, to respective construction elements 2,3.

1 n 1 R o n 1 5

Each construction element 2,3 is filled with sand, which sand is located between the undulations of the wound layers 5,6 ..., i.e. in its cell structure. This ensures that the building 15 is "bulletproof", i.e. resistant to bullet impacts and the like. Figure 3 shows a detail of figure 1 in the sense of a cross-section of the floor with the dividing layers 5,6.

Figure 2 shows another preferred variant, in which a building is built from building wall panels. In the drawn case, the wall panel 10 is formed by three layers of corrugated paper / cardboard which are glued together, each of which - as already stated - consists of a corrugated partial layer 11 and a flat partial layer 12 glued on one side thereof. (in the closed cell structure) of the corrugated partial layers 11 sand applied. To prevent leakage of the sand, the wall panel 10 is sealed along its edges (not drawn 20).

It is preferable to impregnate the corrugated paper / cardboard construction element 2,3 and the wall panel 10 with a resin material, in particular epoxy resin. This not only has the advantage that protection against external influences, such as moisture, is obtained, but also that the constructional strength is increased. In principle, fewer layers of corrugated paper / cardboard are hereby required to provide the construction element with the necessary strength, so that the construction element or the wall panel can be manufactured faster and cheaper. The impregnation preferably takes place by vaporizing, spraying or otherwise, the vapor or spraying direction being parallel to the direction of the "cellular structure" of the corrugated paper / cardboard used.

1015201 6

It is noted that for the lighter papers, the term paper is common while, when the quality is heavier, it is often cardboard. In the foregoing, no restriction with regard to material type 5 is intended when paper or cardboard and weight are involved.

It is also noted that the foregoing is based on single-sided corrugated paper composed of one flat layer 10 and one corrugated papiex layer, but depending on the requirements set, multiple layers may also be used, if desired, of different thicknesses and optionally layers of paper with special properties or a or other film layer, such as a rubber and / or aramid fiber layer.

The invention is not limited to the preferred embodiment (s) discussed above, but also extends to other variants.

20 1015201

Claims (10)

1. A building accessible to persons, provided with at least one construction element which is at least substantially made of layers of paper / cardboard, wherein each layer is at least substantially formed by a corrugated partial layer and a flat partial layer applied on one side thereof, with characterized in that a pressure-distributing means is provided in at least one paper / cardboard layer, which pressure-distributing means is able to withstand a point load in particular as a result of a bullet impact. The building accessible to persons according to claim 1, wherein the pressure-distributing agent contains sand. 3. A building accessible to persons according to claim 1 or 2, wherein the paper / cardboard layers 20 are mutually connected via an adhesive applied to the corrugations of the corrugated partial layers. Personal accessible building according to claim 1, 2 or 3, wherein the construction element comprises more than 25, especially more than 20, more particularly more than 30, even more particularly more than 40 paper / cardboard layers contains. A building accessible to persons according to any one of the preceding claims 1 to 4, wherein the construction element is formed by a wall panel. 6. A building accessible to persons according to claim 5, wherein the wall panel is sealed along its edges. A building accessible to persons according to any of the 1015201 preceding claims 1 to 4, wherein the construction element is tubular and at least substantially manufactured by winding the paper / cardboard layers. 5 Personal accessible building according to claim 7, wherein the construction element forms walls of a space in the building, in particular forms a cross section of the building. 10 9. A building accessible to persons according to any one of the preceding claims 1 to 8, wherein the construction element is provided with a layer of rubber and / or aramid fibers, whether or not of the type as known under the brand name 'Kevlar' or 'Twaron. ". Method for manufacturing a construction element for a publicly accessible building according to any one of the preceding claims 1 to 20, wherein layers of paper / cardboard, each comprising a corrugated partial layer and a flat partial layer applied on one side thereof, interconnected, preferably via an adhesive applied to the corrugations of the corrugated partial layers, and a pressure-distributing agent capable of withstanding a point load, in particular as a result of a bullet impact, being applied in at least one paper / cardboard layer to resist. 1 n1k? n 1