FR2811864A1 - Textile material containing encapsulated antiparasitic agent, useful e.g. as part of a collar or harness to provide long-lasting protection of animals against fleas and ticks - Google Patents

Abstract

A textile material for releasing antiparasitic agents (A) (specifically insect repellents or bacteria repellents) contains (A) in capsules or microcapsules, incorporated by impregnation with an aqueous medium also containing a binder.

Description

TEXTILE MATERIAL WITH PEST CONTROL PROPERTIES

  The invention relates to a textile material capable of releasing substances

  insect repellents, bactericides and generally anti-parasitic.

  More specifically, the invention finds its application very particularly in the animal field, where the problems linked to the eradication of parasites of all kinds are

the most acute.

  To date, a number of solutions exist to try to fight against these parasites. First, anti-flea and anti-flea collars were developed, placed

  at the neck, especially dogs and cats.

  These collars are impregnated with a substance intended to repel the parasites. First of all, if this type of collar is effective, this effectiveness is limited in time, given that the constituent material of the collar, generally plastic or polyurethane is simply impregnated with the active substance, so that in order to have an active effect lasting over time, it is necessary to periodically renew it, typically two months. Furthermore, the action of such collars is often very localized, in particular in the areas adjacent to the neck, and

  therefore do not provide full protection for the animal.

  We have also proposed carpets for animals, endowed with flea and anti

  ticks (see for example FR-A-2 608 368) consisting in mixing an insecticide product with latex, thereby ensuring the production of a foam, generating a certain number of pores saturated with the active product. Such carpets have also been described

in document US-A-3,565,040.

  Once again, we deplore with this kind of carpet the character limited in time

  and therefore particularly ephemeral of the activity of the active principle.

  The object of the invention is to provide a device which is just as simple to implement as the solutions proposed in the prior art, but which has a good durability.

superior in time.

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  Cc textile material capable of releasing insect repellant or bacterifuge substances, and more generally, anti-parasitic, is characterized in that said substances are integrated within capsules or microcapsules impregnated on said

  material by means of an aqueous solution, added with a binder.

  In this way, the active principle contained in the microcapsules is only released during specific actions of the carrier of the material, in particular by scraping, friction, shearing, inducing the rupture of said microcapsules and consequently the release of the

principal active considered.

  According to a characteristic of the invention, these microcapsules have a typical diameter

  between 0.5 and 20 micrometers.

  Furthermore, the encapsulation membrane is made of aminoplast, that is to say

  base of a urea / formaldehydes or melamine / formaldehyde complex.

  The textile support can be of any kind, in particular woven, knitted or even braided.

  A particular embodiment of a strap will be described below in more detail.

  woven according to the present invention.

  Such a strap is produced on a conventional needle loom, of the MULLER type,

  or even, when you want to add a decorative motif on a Jacquard type loom.

  This technique is widely proven, and quite within the reach of the skilled person so there is no need to describe it here in more detail. This strap is for example

  made of polyamide 6, 6, and has a typical width of two centimeters.

  At the same time, the coating sauce comprising the microcapsules containing a

  active ingredient, in particular intended to fight against fleas and parasites, is produced.

  This active ingredient is itself made from essential oil of lemongrass, oil

  essential oil of geranium, allethrine and vegetable oil QSP.

  This mixture is dispersed in an aqueous solution containing the precursors of an aminoplast resin, typically consisting of a formaldehyde - urea or

formaldehyde - melamine.

  The addition of a catalyst acid starts the polycondensation of the precursors of aminioplastc. It forms around the droplets of active product a solid and resistant membrane, capable of having a diameter of between 0.5 and 20 micrometers. The microcapsules thus obtained are dispersed in an aqueous solution, to which a primer binder is added, the composition of which depends on the nature of the material.

constituting the strap.

  In the example described, in which said strap is made of polyamide 6,6, it is possible for example to use a binder sold under the registered trademark

  RHENAPPRET / AS by the company THOR.

  Thus, in the example described, the primer bath presents the following composition by weight: * microcapsules 13.5% * primer binder 4, 5% * water 82% The strap produced previously is continuously impregnated , by soaking in the impregnation solution bath thus produced, at a typical speed of 2,000 linear meters per hour, then it undergoes a padding then a drying step, for example on a drum, in a hot air oven, with infrared radiation, or even by induction. This drying induces the evaporation of the water and consequently

  the fixing of the microcapsules on the strap by polymerization of the primer binder.

  In fact, after drying, a strap is obtained to which a certain quantity of microcapsules adheres (in the example described, the quantity of dry product carried away after the various treatment phases is of the order of 2 to 4% by weight of the primer mixture), the rupture of which, in particular by contact, by friction, by crushing, shearing, causes the release of the active principle, thus allowing to have

  greater durability, therefore greater product efficiency over time.

  Indeed, by the mode of "storage" of the active principle used, there is no longer permanent, continuous and uncontrolled release of it, but discreet diffusion,

  depending on the number and the instant of rupture of said microcapsules.

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  In addition, given the significant reduction in costs inherent in the production of microcapsules on the one hand. and the simplicity of the impregnation technique, on the other hand, it results in the production of supports for materials endowed with properties

  anti parasitic at very low costs and at high rates.

  The applications envisaged are in particular constituted by collars, leashes, blankets and coats for animals, straps, etc. They also relate to

  harnesses, straps, halters, and the like.

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Claims (5)

  1. Textile material capable of releasing it from insect repellent or bacteria-repellent substances, and more generally, capable of developing anti-parasitic properties, characterized in that said substances are integrated within capsules or microcapsules impregnated on said material with   using an aqueous solution, added with a binder.   2. Textile material according to claim 1, characterized in that the microcapsules   have a typical diameter between 0.5 and 20 micrometers.   3. Textile material according to one of claims I and 2, characterized in that the   microcapsule encapsulation membrane is made of aminoplast resin.   4. Textile material according to one of claims I to 3, characterized in that the   textile support is a woven, knitted or even braided.   5. Textile material according to one of claims I to 4, characterized in that it   constitutes the basis of elements belonging to the group including the necklaces,   leashes, straps, straps, halters, harnesses.