FR3051140A1 - ELECTROMAGNETIC ANTI-WAVE MULTILAYER MATERIAL, AND CONTAINING ISOLATED WITH ELECTROMAGNETIC WAVES USING THE MATERIAL - Google Patents

Abstract

According to the invention, the multilayer material comprises: a heavy mass layer having a thickness of between 1 mm and 5 mm; an agglomerated acoustic foam layer having a thickness of between 15 and 35 mm; and an aluminum layer with a thickness of between 5 μm and 15 μm.

Description

The present invention relates to an electromagnetic anti-wave multilayer material and an electromagnetic wave insulated container using the material.

By the term "insulated container", reference is made to an isolated place such as a building or room in a building, or to a closed receptacle such as a box or cabinet, internally defining a space in which can be placed one or more electronic devices, in particular one or more mobile phones, this location being such that no electromagnetic wave can exit or enter said space.

Devices connected to a general network by means of electromagnetic waves, in particular so-called "SmartPhone" mobile telephones, have become widespread among individuals over the last decades, as a result of the lower prices of these devices. Numerous studies show the aggressive nature of a saturated environment in waves, and mobile phones are equipped, for most of them, devices to reduce the exposure to these waves. In addition, the widespread use of these mobile phones has raised many privacy concerns, especially when these mobile phones are introduced to confidential locations or events such as business meetings or boards of directors. In addition, mobile phones can be sources of deconcentration and disruption during sessions that need to be concentrated, for example in training, in a school, etc.

There are currently no materials or isolated locations to overcome the aforementioned drawbacks, and the present invention aims to fill this gap.

A main objective of the invention is therefore to provide a multilayer material having electromagnetic wave stopping capabilities.

Another object of the invention is to provide an isolated location using this material, in order to allow a user to isolate a space, such as a building room or a receptacle for placing a device such as a mobile phone therein. .

The multilayer film according to the invention comprises: a heavy mass layer having a thickness of between 1 mm and 5 mm; an agglomerated acoustic foam layer having a thickness of between 15 and 35 mm; and an aluminum layer having a thickness of between 5 μm and 15 μm. The inventor has in fact discovered that a film thus formed makes it possible to obtain an insulation against most of the electromagnetic waves and makes it possible to achieve good isolation of a mobile phone with regard to the electromagnetic waves emitted or received by such a person. phone.

In addition, this material provides good sound insulation.

Preferably, the heavy mass is a viscoelastic bitumen mass compound having a basis weight of 5 kg / m 2, composed of a polypropylene upper face and a lower face made of acrylic adhesive, the heavy mass being of a thickness of 1 mm. This material is such as that sold by the company Elastomer Solutions.

Preferably, the layer of acoustic foam is polyurethane-based composite agglomerated foam having a density of between 160 and 200 Kg / m 3 and a thickness of 25 mm, such as that sold by the company Elastomer Solutions.

Preferably, the aluminum layer has a thickness of 10 μm.

Preferably, the heavy mass layer is the outer layer of the material and the aluminum layer is the inner layer.

Preferably, the agglomerated acoustic foam layer is located between the heavy mass layer and the aluminum layer.

Preferably, the different layers are arranged according to several configurations.

Preferably, said insulated container is in the form of a box comprising said multilayer material covering all of its walls, this box delimiting a receptacle inside it.

A user can thus place an electronic device connected by electromagnetic waves to a communication network, in particular a mobile phone, inside said box, to cut with certainty the exchanges of the apparatus with said network, by cutting the reception and emission of waves.

According to a preferred embodiment of the invention, said box further comprises: a reception space of an electronic device; - A weight detector, located at the bottom of the receptacle formed by the box; - a light detector, located at the receptacle; - an information display screen, located on the outside of the box; - personalization elements; control means; and an electronic control card comprising a program for managing these detectors and this screen.

When using the device, the screen allows the user to follow the various operating instructions. A message appears on this screen prompting the user to place the device inside the box. The weight detector detects that a device has been placed inside the box. The screen then displays a message inviting the user to close the box. The closure is validated by the detection, by the light detector, of the darkness inside the box. Provided that a device is placed inside the box and that the box is actually closed, the screen displays a stopwatch to know how long the device is placed in the box. The stopwatch is reset if the container is opened and the device is removed.

Preferably, the electronic device comprises a memory in which several operating times of the box are saved. The user can thus consult his previous operating times.

Preferably, the stopwatch is not reset if the box is open.

Preferably, the box comprises a receiving plate of the apparatus forming the bottom of said receptacle, this plate forming a pyramidal projection truncated at its lower face, bearing against said weight detector.

This projection allows that the tray bears against the weight detector by a reduced area, favoring the detection of relatively lightweight devices, such as mobile phones.

Preferably, the box comprises two magnets, one on each side of one of the walls of this box, for fixing personalization elements of the box.

According to another embodiment of the invention, said isolated location comprises several boxes as mentioned above and a structure, or "rack", for receiving and supporting several of these boxes.

This medium and a plurality of these boxes can be used on the occasion of collective events, such as conferences. The invention will be better understood, and other features and advantages thereof will appear, with reference to the appended schematic drawing, showing, by way of non-limiting examples, a preferred embodiment of the multilayer material and a box. insulation it concerns.

Figure 1 is a side view of a portion of this multilayer material; Figure 2 is a sectional and side view of a box including this material along its walls; Figure 3 is a perspective view of the box equipped with a display screen and a personalization element; Figure 4 is a sectional and side view of a box equipped with a weight detector and a light detector; Figure 5 is a perspective view of a structure, called "rack", receiving and supporting a plurality of boxes; and FIGS. 6a and 6b are views of a flowchart showing, in the form of an algorithm, the operation of the box according to FIG. 4.

As can be seen in FIG. 1, the multilayer material 1 is composed of a top layer of heavy mass 10, a middle layer of agglomerated acoustic foam 11 and a lower layer of aluminum 12. The composition of the material 1 allows the insulation of the waves as well as a soundproofing.

As shown in Figures 2 and 4, the multilayer material 1 is used to cover the walls of a box 2. The box 2 comprises an upper portion 21 and a lower portion 22, and a receiving space 23 of an electronic device.

According to a preferred embodiment, the box 2 further comprises a weight detector 24, a light detector 25, and an electronic control card 26.

As can be seen in FIG. 3, the box 2 also includes an LCD screen 27 and a personalization element 29 named avatar.

Figure 5 shows a storage rack 3 for receiving a box 2. The storage rack 3 comprises lugs 31 on its upper surface and receiving holes 32 of said lugs 31 on its lower surface. Several storage racks 3 can be stacked using the lugs 31 and the receiving holes 32 in order to obtain storage suitable for receiving several boxes 2.

FIGS. 6a and 6b show the flowchart, in the form of an algorithm, of the management program (4) of the box 2 by means of the electronic control card 26. Thus; when an electronic apparatus is placed in the reception space 23, the weight detector 24 detects the presence of the apparatus and sends a signal to the control electronic card 26 which displays the message "close the box" on the 27. The light detector 25 is used to confirm the closure of the box 2. The electronic control card 26 then allows the LCD screen 27 to display a stopwatch or a countdown timer. If the box 2 is open, the light detector 25 sends a signal and the control electronic card 26 suspends the stopwatch or the countdown until the closure of the box 2 if the electronic device is not removed. If the electronic device is removed, the electronic control card 26 saves the elapsed time and displays the message "Ask Phone". The LCD 27 comprises control means 28 for navigating the operating program represented by the flow chart 4 and in particular to start and stop the program and to consult the different times made when using the program. box 2.

Claims (10)

1. multilayer material (1) anti-electromagnetic wave, characterized in that it comprises: - a heavy mass layer (10) having a thickness of between 1 mm and 5 mm; an agglomerated acoustic foam layer (11) with a thickness of between 15 and 35 mm; and an aluminum layer (12) with a thickness of between 5 μm and 15 μm. Multilayer material (1) according to Claim 1, characterized in that the heavy-mass layer (10) is a viscoelastic bitumen-mass material with a basis weight of 5 kg / m 2, consisting of a polypropylene upper surface. and a lower face of acrylic adhesive, the heavy mass (10) being of a thickness of 1 mm. Multilayer material (1) according to claim 1, characterized in that the agglomerated acoustic foam layer (11) is a layer of polyurethane-based composite agglomerated foam having a density of between 160 and 200 Kg / m3 and 25 mm thick. Multilayer material (1) according to claim 1 to 3, characterized in that the aluminum layer (12) has a thickness of 10 μm. 5. multilayer material (1) according to any one of claims 1 to 4, characterized in that the heavy mass layer (10) is the outer layer of the material and the aluminum layer is the inner layer. 6. multilayer material (1) according to any one of claims 1 to 5, characterized in that the agglomerated acoustic foam layer (11) is located between the heavy mass layer and the aluminum layer. 7. Multilayer material (1) according to any one of claims 1 to 6, characterized in that the different layers are arranged in several configurations. 8. Isolated container with regard to electromagnetic waves, characterized in that the walls which delimit it are insulated by means of the multilayer material (1) insulating according to any one of the preceding claims. 9. insulated container according to claim 8, characterized in that it is in the form of a box (2) comprising said multilayer material (1) according to claim 1 covering all of its walls and in that it comprises: - a reception space (23), - a weight detector (24); a light detector (25), an electronic control card (26) comprising a management program (4) for the box (2), a screen (27), control means (28), and - personalization elements (29). 10. Insulated container according to claim 9, characterized in that each container is arranged in a storage rack (3), several racks (3) can be stacked to form a storage space that can accommodate multiple containers.