Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1991-06-06
1994-05-31
Loney, Donald J.
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
428142, 428172, 428195, 428201, 428204, 428203, 428207, 428517, 428519, 428521, 156196, 156243, 156277, B32B 2708
Patent
active
053168615
DESCRIPTION:
BRIEF SUMMARY
SUBJECT OF THE INVENTION
The present invention relates to floor and wall coverings exhibiting improved properties, in particular in respect of their behavior in fire and the hazards which they present of releasing toxic fumes on burning, both in an accidental fire and when they are incinerated deliberately.
Its subject is also the process for producing such products.
PROBLEMS ADDRESSED BY THE INVENTION
Floor or wall covering products make extensive use of polymeric compositions derived from vinyl chloride or from nitrogen-containing compounds such as polyurethanes, polyamides and the like.
Accidental combustion of such products during a fire gives rise to extensive releases of gases, especially ones containing chlorine (consisting essentially of HCl). The latter are the primary cause of many deaths during fires or of injuries which are crippling both to the victims and to the emergency services.
Treatment of wastes by deliberate incineration also produces pollution which cannot be overlooked, despite precautions which may be taken, such as preliminary sorting.
The use of filters or of other devices results in any event in a prohibitive increase in the costs of treatment of refuse, without solving all the pollution problems.
Deliberate or accidental burning of refuse dumps gives rise to a release of gaseous toxic agents, which is generally greater than that from a treatment of these same wastes by incineration, because of the uncontrolled nature of the combustion which is, moreover, generally incomplete.
There is therefore an urgent need to have available a method of producing floor and wall covering products which have fewer disadvantages than those in existence.
The environmental impact of wall and floor covering products is described in Patent Application EP-A2-0,274,115. The proposed solution is based on the use of a molten substance comprising inorganic substances, which is homogeneous or deposited on an underlayer of glass fiber nonwoven. After printing, this product may receive a finishing varnish.
The decorative possibilities are obviously necessarily restricted and the physical behavior of the products in particular their strength is not necessarily ensured in all cases.
OBJECTIVES OF THE INVENTION
The present invention is aimed at obtaining a floor or wall covering product of novel type, which is distinguished from the products obtained by processes which are essentially technical in the broad sense, such as woven or tufted carpets or those made of so-called nonwoven materials and which avoids the use of polymers capable of releasing chlorine-containing or nitrogenous compounds.
It is aimed at also bringing about improvements in the properties of the products obtained and in their production conditions.
DESCRIPTION OF THE TECHNIQUE OF THE INVENTION
Until now, the technique of producing floor or wall coverings by a non-textile route has relied broadly on PVC, as a result of the great ease of processing of this product by various techniques, in particular by coating a plastisol onto an underlayer of glass fibres or the like. It should be borne in mind in this respect that users show themselves to be particularly demanding both in respect of the physical use properties of the products (wear resistance and stain resistance) and of the decorative appearance of the product (reproduction of natural or other patterns, gloss, relief or structure, and the like).
The technique employed must therefore also make it possible to obtain the desired decorative effect by printing while ensuring a suitable behavior in use.
It has become apparent that these requirements can be satisfied by a technique comprising the application of at least one upper sheet onto a filled and plasticized lower sheet, a decoration being interposed between the said layers and the whole consisting essentially of a material derived from a propylene polymer.
"Essentially consisting of a material derived from a propylene polymer" is intended to mean a substance in which the quantity of propylene-derived-constituents in the mixture o
REFERENCES:
patent: 4759968 (1988-07-01), Janssen
Dao Dung V.
Marchal Daniel
Loney Donald J.
Sommer S.A.
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