DE3535523A1 - Mat for the controlled release of substances, and method for making it - Google Patents

Abstract

Method for the qualitative and quantitative control of the release, either by heating or without heating, of a scent, deodorant, insecticide, insect repellent, mothproofing agent, disinfectant, pesticide and other substances which are imbibed in an inert mat, is described, and also the application of this method in making suitable mats (1) for use in practice. Such a mat (1) is wholly or partially coated either on the upper surface or on the lower surface or on both surfaces, in particular on the upper surface, with a thin metal foil (2) or another non-porous, impermeable, compact material, and is coated on the lower surface with a thin ply (3) of heat-insulating material or on the upper and lower surfaces with a metal foil etc. or a heat-insulating material. By incision and removal of a part of the surface of these additional coatings, the desired release rate of the active material, with which the mat (1) is imbibed, can be achieved. The preference for one or other method depends on the volatility of the active substance, on the temperature of the implement, etc. The mats (1) can be heated in small electrical appliances, or the release of the active substance can take place without heating and with the use of natural or artificial methods. <IMAGE>

Description

Patent attorney
Pipl.-Ing. Rolf Menges

Erhardtstrasse 12 D «8fl00MünclMi5

Attorney's file B 247 October 04, 1985

Eduard Bratitch
Athens / Greece

Mat for the controlled escape of substances and process for their manufacture

The invention relates to a method for qualitatively and quantitatively controlling the escape - either ■ by or without heating - of fragrances, deodorants, insecticides, insect repellants, moth repellants, Disinfectants, pesticides and other substances imbibed in inert substance and the application of the procedure in the production of suitable mats (among which, in general, platelets are to be adjusted) or fleeces for practical use Use.

It is widely known that problems of deodorization, disinfection, insect repellent, fragrance release, etc. from time to time in different fields

appear. It is also known that research laboratories in various industries have attempted to do this Solve problems using multiple processes. The result of this research was the appearance a new technology that has gained worldwide recognition, namely aerosol products or sprays. Your effect is based on the instantaneous expulsion and atomization of active matter in fine droplets by solvents and pressurized propellants into the atmosphere.

It should be noted that the active life of aerosol products is limited.

The invention described herein is related to but different from the technique of another newer technology through a very similar goal directed to the aerosol products but accomplished in a different way is, and is concerned in particular with the production of mats from various permeable and porous, inert Materials {i.e. Paper, cardboard, plastic, etc.) that contain fragrances, deodorants, insecticides, insect repellants, Moth repellent, disinfectant, pesticide and others Substances are soaked. When the aforementioned mats are introduced or used in small electrically heated devices they escape the active substance contained in them within a certain, relatively short period of time Form in a very fine, invisible mist into the atmosphere. The main problem that arises today when using of mats that have been produced in this way consists in the fact that the existing environmental conditions, the temperature range of the various small electrical devices, the type of active substance contained, etc. directly influence the escape forced by heating. The active substance is a mixture of several raw materials with different volatilization rates,

resulting in a non-isochronous and uneven rate of evaporation of these materials, especially in the early stages of the use of the mats.

The result of this initially intensive partial escape of the more volatile components is:

A. - the qualitative differentiation of the active substance;

B. - the quantitative, anisomeric and non-uniform distribution of the active substance over time.

This irregular escape process ultimately leads to a completely unsuitable working of the product.

Another way to control the escape of the active substance contained in the above mats would be the use of special small electrical devices for each special case, ie electrical devices that work at 70 ⁰ C, could be used for fragrance and deodorant, and the usual commercial electrical devices that work at 150 ⁰ C could be used for insecticides. It is nevertheless obvious that in this lower temperature range only the volatile components contained in the active substance would escape and that the entire remainder would remain unused, which would lead to the following results:

a) The quite certain inefficiency of the performance of the Mat, and

b) the inevitable mistakes on the part of the user in choosing the appropriate device, if two or more than two types of products can be used.

The escape of the active substance from mats or boards can be done by any other natural or electrically heated device without the use of small electrical appliances artificial process is applied (i.e. high ambient temperature, ventilation, etc.), creating conditions of forced

Escape of their contents are created. However, it will address the problem of irregular, non-isochronous and anisomeric leakage of the various imbibed actives for the same reasons as in the previous case.

The object of the invention is to avoid the aforementioned disadvantages and problems of the routine that is already in place.

The invention accordingly provides a new and more efficient one Process for the production of mats with imbibed fragrance, deodorant, insecticide, insect repellant, moth repellent, Disinfectants, pesticides and other substances that have a more economical performance have either by using the electric heated small devices or without these, being in the latter If any other natural or artificial process of forced escape is used. The advantage of this Process are the uniform, isochronous, isomeric and, moreover, the homogeneous and longer service life of the Product as well as the complete consumption of the substances it contains, the result being a perfect and economical one Efficiency is. The following analytical • Description makes clear the way in which the object of the invention is achieved.

Several embodiments of the invention are set forth below described in more detail with reference to the drawing. It shows

Fig. 1 is a perspective view of a conventional mat, which is imbibed with the desired active substance, which by heating in an electric heated small device is released,

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Fig. 2 is a cross-sectional view of a mat, on the upper surface of which according to a preferred Ausfühfungsforra of the invention applied a thin metal foil to control the escape rate has been,

3 shows a cross-section in a perspective illustration a mat with a thin film applied to its upper surface,

Fig. 4 is a cross section of a mat, on the lower Surface according to a further preferred embodiment of the invention, a thin layer of thermal insulation material has been applied

Fig. 5 is a perspective view of a cross section of a mat, on the lower surface of a thin Layer of thermal insulation material has been applied,

Figure 6 is a cross-section of a mat, one of which is according to yet another preferred embodiment of the invention the upper surface with a thin metal foil and the lower surface with a thin one Layers of thermal insulation material have been covered,

Fig. 7 is a perspective view of a cross section of the mat, which on its upper surface with a thin metal foil and on its lower surface with a thin layer of thermal insulation material is covered,

8 in plan view, front view and side view thin metal foil used to cover the top surface of a mat, where

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according to a preferred embodiment of the invention the surface of which is perforated in a pattern made up of a series of symmetrical slits appears, and

9 in plan view, front view and side view

the thin layer of thermal insulation material that you cover the lower surface of the mat is used, wherein according to a preferred embodiment of the invention, the surface in one Pattern made up of a series of symmetrical holes appears perforated.

Certain illustrative and preferred embodiments of the invention are now referred to below described on the drawing. As already mentioned in the introduction to the description, a conventional mat (Fig. 1) certain disadvantages when it heats up in normal use where it is mounted on a small electrical device will. These disadvantages relate to service life, intensity, and non-uniformity, non-isochronous and anisomeric qualitative and quantitative escape of their active substance into the environment, which leads to an irregular, uncontrolled and uncomfortable diffusion and an uneconomical effectiveness of the mat properties leads.

The invention creates a qualitatively and quantitatively absolutely predictable and continuous process of escape, for example in terms of intensity, if it is a fragrance or one of the other active substances, into the environment and ensures that the product is completely used up during its prescribed service life.

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According to a preferred embodiment of the invention (Fig. 2 and 3) this is achieved by covering the upper surface of the mat 1 with a thin metal foil 2 or with any other non-porous or impermeable material is coated, which is ready for use or polymerizable or curable, etc. and consists of one or more components, creating a new, impermeable surface like Metal is created on the top surface on the mat will. This coating is either made by gluing the metal foil 2 etc. on the body of the mat 1, which is made of inert porous material, or by inserting a thermoplastic adhesive film between the two surfaces (i.e. a thin polyethylene film, etc.) or by means of made of another adhesive of some kind and shape.

A result similar to the use of the metal foil 2 can also be achieved if some simple coating with a substance is used that is hard or polymerizable and consequently becomes dense and impermeable, itself after the active substance has escaped from the mat, as well as through the use of any other method that their upper surface is made impermeable. The mat therefore remains active for the vapors of the escaping Fabric only penetrates the remaining exposed surface, which is not connected to the dense and impermeable Coating is coated, permeable, which allows for high escape rates of the active substance and its qualitative differentiations can be reduced considerably.

According to a further preferred embodiment of the invention (Fig. 4 and 5) the object is achieved by covering the lower surface of the mat 1 with a thin layer made of thermal insulation material (e.g. cork, asbestos, etc.), the

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direct contact with the plate of the usual electrically heated small device, the operating temperature of which is in the range of 140-150 ⁰ C, prevented.

In this way, the mat 1 is less adversely affected by the relatively high temperature of the plate of the electrically heated small device. As a result, the active substance escapes through a less forced process and at a slower rate. This means that the escape is performed to qualitatively and quantitatively more controlled manner than in the mat 1 because the temperature is in the lower range of 75-95 ⁰ C. The disadvantage of creating a supersaturated and uncomfortable atmosphere due to the rapid diffusion of the overheated active substance in the early work phase is avoided in this way. The reduction in the escape rate, the reduction in the mat effectiveness due to the remaining unused active substance in the mat and the qualitative differentiation in the course of operation, which is explained in more detail below, are also avoided. When the mat 1, which is provided with the thermal barrier coating 3 on its lower surface, is used on the usual electrically heated small device, the result is a low escape rate which is homogeneous because of the lower temperature of the imbibed active substance. If, after the first few hours of operation, the mat is turned upside down on the small, electrically heated device, the following development is observed: a significantly reduced amount of the active substance still remains in the mat, despite its previous use. After turning the mat upside down, the exposed surface of the thermal insulation material that was facing down is now facing up. Instead, the uncoated surface of the mat that faced up is now

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in direct contact with the high temperature hot plate of the small electrically heated device. After the mat has been brought into its new position, it works in the same way as the mat covered with the perforated metal foil, since the heated material is porous. One result of this artifice is the reduction of Entweichungsgeschwindigkeiten- of the active substance in the second phase and the exhaustion AUT isomeric and isotropic manner, whereby any disadvantage which would be caused by the high temperature of the device (140-160 ⁰ C) is avoided.

According to a further preferred embodiment of the invention (Fig. 6 and 7) the object is achieved by covering both surfaces of the mat 1, namely the upper one with a thin metal foil 2 and the lower one with a thermal insulation material.

Coating either the top surface of the mat 1 with a thin metal foil 2 or the lower surface of the mat 1 with a thermal insulation material 3 or both surfaces the same way can be done in whole or in part. The coating is considered whole if the entire upper and / or lower Surface overall with an additional compact material is covered. The coating is considered partial if there are symmetrical slots, holes on the above compact surfaces or perforations 4 (Figs. 8 and 9) which can be present either independently or simultaneously. Leading first, that the active substance contained in the mats has more ways to escape up and / or down finds which are not those that do not exist without such slots, holes or perforations, and second, to reduce the thermal insulation created by the thermal insulation material on the lower surface of the mat

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is available. Depending on the conditions of each particular case (active substance, volatility, temperature value of the heating plate of the small electrical device, etc.) Therefore, the qualitative and quantitative release of the active substance will be in an isomeric, uniform and isochronous manner achieved what is aimed at with the invention. The holes, perforations or slots 4 that are on the top or Lower coated surfaces 2 and 3, respectively, of the mat can be of any shape and size desired so the required ideal rate of escape of the active substance of the mat is achieved in each particular case will. It should also be noted that the manufacture of the mats 1 with upper and lower impermeable or heat-insulating Coatings are not limited to those who have the form and shape currently used in electrical heated small devices. The same procedures mentioned above can also be used successfully with other, smaller, larger or any shape, shape and size having mats can be used which imbibed theirs can release active substance into the environment, even without the use of small electrically heated devices. Instead of using these devices, various natural or man-made procedures can be used to create specific . or more intense escape rates than those to be achieved, which are to be expected due to the normally prevailing environmental conditions.

Some illustrative cases may be mentioned: a) a natural or promoted cold or hot air flow; b) a natural one or technically increased ambient temperature; c) an accidental or for various reasons, for example too artificial, evoked movement continuously or temporarily around the center of equilibrium of the imbibed mat. Finally, it should be noted that the above

Description to certain, illustrative Embodiments of the invention relates to which the invention is not limited.

The above statements show that regardless of changes or modifications of the shape, the applications, the size, the shape, components and manufacturing process of the mat, the process used in each case to control the escape as long as it is not a new, inventive step and not for technical advancement Development of the prior art contributes, as is to be regarded as lying within the scope of the invention.

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Claims (7)

Attorney's file B 247 Patent Attorney Dipl.-Ing. Rolf quantity «ο 4.1 ο. 19 85 Erhardtstraße 12 D-8000 Munich 9 Eduard Bratitch Athens / Greece Claims: 1. Process for the production of mats with a qualitative and quantitatively controlled escape of fragrance, deodorant, insecticide, insect repellant, moth repellent, Disinfectants, pesticides and other substances that are imbibed in the mats, with the substances volatilize when the mats are brought into or used in small electrically heated devices or if, without the small, electrically heated devices, a forced escape of the substances is achieved by others natural, artificial or various other processes can be set in motion, with the forced escape in a uniform, isochronous and isomeric manner until complete Consumption of the contained material is effected, with the qualitatively and quantitatively controlled escape is achieved by covering the top or bottom surface of the mat, i.e. the top surface with a thin film made of dense and impermeable material and the lower surface with a thin layer of thermal insulation material or by simultaneously covering the upper surface with the thin film of dense and impermeable Material and the lower surface with the heat insulation material. 2. A process for the production of mats with a qualitatively and quantitatively controlled leakage occurs _V on perfume, deodorant, insecticide, insect repellent, moth-proofing agents, disinfectants, pesticides and other substances which are imbibed into the mats, as claimed in claim 1 in that the cover of the upper surface of the mat with dense and impermeable material with a thin metal foil or with some other compact material, ready for use or obtained by a suitable process or treatment. 3. Process for the production of mats with a qualitatively and quantitatively controlled escape of fragrance, deodorant, Insecticide, insect repellant, moth repellent, disinfectant, pesticide and other substances that are used in The mats are imbibed according to claim 1, characterized in that the coating of the upper surface of the mat with dense and impermeable material is done with a thin film and that covering the lower surface takes place with a thin layer of thermal insulation material, the upper and / or the lower coating is whole if the upper and / or the lower surface is completely covered. 4. Process for the production of mats with a qualitatively and quantitatively controlled escape of fragrance, Deodorant, insecticide, insect repellant, moth repellent, disinfectant, pesticide and other substanceseb, imbibed in the mats according to claim 1, characterized in that the coating of the upper surface the mat with dense and impermeable material with a thin film and / or covering the lower Surface is made with a thin layer of thermal insulation material, the upper and / or lower cover being partial when holes, perforations or slits are created in the cover in order, on the one hand, to prevent the escape routes of the active substance contained in the mat (1) via those created thereby
to increase the exposed surface and, on the other hand, to provide the insulating shielding of the lower surface of the mat
to reduce, wherein the holes, perforations and slits have any desired and suitable shape and dimension so that the at times qualitatively and quantitatively desired rate of escape of the active substance imbibed in the mat is achieved in each particular case. 5. mat, in particular produced according to one of claims 1 to 4, characterized in that the escape of
Fragrance, deodorant, insecticide, insect repellant,
Moth repellants, disinfectants, pesticides and other substances imbibed therein in a qualitatively and quantitatively controlled uniform, isochronous and isomeric manner
takes place until the imbibed active substance is completely used up, the mat (1) having a suitable shape and dimensions so that it can escape the
Substances can be introduced or used in an electrically heated small device. 6. mat, in particular produced according to one of claims 1 to 4, characterized in that the escape of
Fragrance, deodorant, insecticide, insect repellant,
Moth repellants, disinfectants, pesticides and other substances imbibed therein in a qualitatively and quantitatively controlled uniform, isochronous, isomeric manner until the imbibed active substance is completely used up, the mat (1) having any shape and any dimensions that ensure that the imbibed Substances escape into the atmosphere without a electrically heated device is used, but by using other natural and artificial processes that can cause a forced escape rate. 7. Process for the production of mats with a qualitatively and quantitatively controlled escape, wherein the Mats (1) with fragrance, deodorant, insecticide, insect repellant, moth repellent, disinfectant, Pesticide and other substances are imbibed and where these mats as well as the mats produced by the method according to one of claims 1 to 4 and the mats according to Claim 5 or 6, heated or not heated.