Stock material or miscellaneous articles – Pile or nap type surface or component – Particular backing structure or composition
Patent
1994-01-21
1996-06-18
Ryan, Patrick J.
Stock material or miscellaneous articles
Pile or nap type surface or component
Particular backing structure or composition
428 85, 428 96, 428357, 428372, 428378, 428394, 428395, 428907, 424403, 424404, 424405, 424407, B32B 900
Patent
active
055275826
DESCRIPTION:
BRIEF SUMMARY
SUBJECT OF THE INVENTION
The present invention relates to textile-based floor covering or wall covering products endowed with acaricidal properties.
The invention also encompasses the processes of preparation of these products.
STATE OF THE ART
It is known, from the work of Voorhorst and Spiekssma, that numerous so-called house dust allergies are caused by acarids. A relatively complete bibliography on the subject has appeared in the article by J.E.M.H. van Bronswijk: "Hausstaubmilben, Vorkommen und Bedeutung" ("House dust mites, occurrence and significance") in Allergologie, 1, No. 2, 1978, p. 55. It is known that the pyroglyphid acarids, essentially represented by Dermatophagoides pteronyssinus, Dermatophagoides farinae and Euroglyphus maynei, derive their nourishment from human and animal squamae (dead skin, debris of nails, fur and feathers): the daily loss per individual of 70 to 140 mg of squamae permits several thousands of acarids to live for several months. Furthermore, mould growths form part of their biotopes, because these provide them with a supply of vitamins and permit predigestion of the squamae. They live in areas where their nourishment is to be found, that is to say in places where man rests, under optimum conditions of atmospheric humidity (80% relative humidity) and of temperature (25.degree. C.), and in the absence of light, because they are sensitive to solar UV. The pyroglyphid acarids, whether dead or alive, are allergizing. This is also true of their excrement and their teguments. Consequently, any treatment of the environment of patients who are allergic to acarids must involve an acaricidal treatment.
Recent studies of the effect of acarids have been published by Platts-Mills and Chapman in J. Allergy Clin. Immunol., 80., Dec. 6, 1987, p. 755 and by E. Bischoff: Methodes actuelles de quantification des acariens dans l'habitat (Current methods of quantifying acarids in the habitat), Rev. fr. Allergol., 1988, 28 (2), pp. 115-122.
Whilst bedding is the place which conceals the largest number of acarids, squamae of human and animal origin are to be found copiously on the floor surface and especially in the floor coverings and/or wall coverings such as pile carpets and wallpapers, which consequently constitute a secondary proliferation medium for the acarids.
In the present text, a textile floor covering or wall covering is to be understood as a covering obtained by shaping a textile material, for example a yarn, fibre or flock by techniques known per se, for example by tufting or needle-punching, but also by the so-called verticalization techniques described in the publication WO 91/00382 or by the techniques described in the Patents FR-8 607 842 and EP-0 811 460, which involve an ultrasonic welding process.
In order to fix the textile fibres so as to ensure dimensional stability and so as to meet the comfort requirements, the floor coverings and/or wall coverings as described above are provided, on the back, with a layer which is generally deposited by coating and which forms a polymeric backing hereinafter referred to as a polymer matrix. It also performs a number of other functions such as heat and sound insulation, increase in mechanical strength, etc.
It should be noted that in the case of the textile floor coverings and/or wall coverings obtained by the conventional tufting processes as well as those obtained by the verticalization or ultrasonic welding techniques, the backing also comprises a nonwoven, preferably of polyethylene terephthalate (PET), which may accordingly be involved in the definition of the backing.
For these reasons, the backing referred to as a polymer matrix is generally composite and often consists of several superposed layers.
The most widely used products for forming the backing are matrices of plasticized PVC, polyurethane foams or latices of the styrene-butadiene type and optionally combinations of these, more generally in combination with other materials such as nonwoven webs or glass webs.
By virtue of their configuration, the textile floor cove
REFERENCES:
patent: 3857934 (1974-12-01), Bernstein
patent: 5024840 (1991-06-01), Blakely
Chemical Abstracts, vol. 113, No. 11, Sep. 10, 1990, U.S., abstract No. 93315W & JP-A-0268364 (NIPPON TERPENE), p. 278.
Bahta Abraham
Ryan Patrick J.
Sommer S.A.
LandOfFree
Floor covering and/or wall covering products having an acaricida does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Floor covering and/or wall covering products having an acaricida, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Floor covering and/or wall covering products having an acaricida will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-221442