CA2664730A1 - Antibacterial strip of wood and method of manufacture - Google Patents

Abstract

The invention relates to antibacterial wood slats to be assembled to form an antibacterial floor. The wood slats comprise an adequate amount of at least one antibacterial agent present on the lower and upper faces and on the four sides of the slats. The invention also relates to a method of manufacturing these slats which comprises the following steps: a) applying on the sides of a slat at least one layer of a first antibacterial composition; b) applying on the underside of the lath at least one layer of a second antibacterial composition; and c) applying on the upper face of the lath at least one composition of a third antibacterial solution. Steps a), b) and / or c) of the process can be performed in an interchangeable order or simultaneously. The invention also relates to floors or wooden floors formed of these antibacterial slats.

Description

ANTIBACTERIAL WOOD LATTE AND METHOD OF MANUFACTURE
Field of the invention The present invention belongs to the field of construction, and more particularly the manufacture of floors or floors of slats of wood.
The invention relates to a new method of manufacturing wooden slats in order to of give them the property of being antibacterial or antibiotic. The invention concerned also the wooden slats resulting from this process and the floors built with these slats.

Description of the prior art The construction of hardwood floors, also called parquet floors, is good known to those skilled in the art. A floor is usually made of slats of wood assembled according to various modes. For example, we speak of so-called floors in English where the slats are laid parallel to each other.
other;
or floors called sticks where the slats are laid in rows forming an angle.

Those skilled in the art will also use the terms slats, blades or boards to talk about wooden slats.

The slats are assembled according to different methods well known to man of art in order to mount the floor on the floor to be covered.

Hardwood floors are made of wood slats whose thickness minimum is about 2.5 mm. The slats used during assembly can to be :

2 varnished, then we speak of prefinished floors;
oiled; or laminated and / or laminated.

The slats can also be installed in raw wood, the floor being varnished a once mounted.

In the case where the slats are pre-treated before being installed, the man of art will use in the coating or varnish used, an adequate amount of an agent antibacterial or antibiotic, to ensure protection of the part higher floor against mold and bacteria.

However, the current floors have the defect of being treated only on the upper part of the floor. In fact, the edges of the slats and the underside of the floor are not treated against bacterial overgrowth, dirt, of dirty water (for example when washing the floor) or food spilled on the floor can penetrate or seep under the floor enter the slats via the interstices between these slats, resulting over time a bacterial or fungal growth (molds).

The present invention addresses this problem as follows.
Summary of the invention The invention covers a method of antibacterial treatment of a wooden slat intended to be assembled with other treated wood slats to form a antibacterial floor.

The wooden lath comprises an upper face intended to form a surface upper floor; a lower face intended to form a surface lower floor; and four opposite sides two by two and intended each

3 from them to receive one of the sides of an adjacent latte during the formation of the floor.

The method according to the invention comprises the following steps:
at. apply on the sides of the lath at least one layer of first antibacterial composition;
b. apply on the underside of the lath at least one layer a second antibacterial composition; and vs. apply on the upper side of the slat at least one composition of a third antibacterial composition.

Steps a, b and / or c of the process according to the invention can be carried out in an interchangeable order or simultaneously.

The invention also covers an antibacterial wood slat obtained by the process defined above.

The invention also covers an antibacterial wood slat intended to be assembled with other antibacterial wood slats to form a floor antibacterial. The wooden lath includes:
an upper face intended to form an upper surface of the floor;
a lower face for forming a lower surface of the floor;
four opposite sides two by two and intended each of them to receive one of the sides of an adjacent slat during the formation of the floor; and an adequate amount of at least one antibacterial agent present on the lower and upper faces and on the four sides of the batten.

4 The invention also covers an antibacterial wood floor obtained by the combination of a plurality of antibacterial wood slats such as those defined above.

The invention also covers the use of a plurality of slats antibacterial such as those defined above, to form a floor.

The presence of an antibacterial agent in adequate quantity on all parts latte provides antibacterial and / or antifungal protection to all of it and not only to the upper face intended to form the surface visible from the floor.

Thus the invisible parts of the floor, that are the lower surface and the interstices between slats, are also protected against proliferation bacterial and / or fungal.

The invention and its advantages will emerge better from the description not limited following of various preferred embodiments of the invention.

Detailed description of preferential elements of the invention:

The invention covers a method of antibacterial treatment of a wooden slat intended to be assembled with other treated wood slats to form a antibacterial floor.

The wooden batten, blades or slats, is usually a board of a variable thickness. For the design of a floor, the blade has preferably a thickness of at least about 2.5 mm.

The lath includes an upper face for forming a top surface of the floor once different slats of wood are assembled on the itself.

This upper face of the batten is therefore the visible face once the slats assemblies.

The batten also includes a lower face intended to form a surface

5 will be hidden when the floor is assembled on a floor.

Each latte obviously includes four opposite sides two by two. The length of these sides is variable. The sides can be equal as different. In general, the term "lath" means longitudinal boards where the width is much less than the length. For example, a wooden slat can measure from about 0.254 meters to about 2.5 meters long for a width from about 50 mm to about 205 mm.

The sides of the slats are intended each of them to receive one of the sides of a adjacent batten when forming the floor. They can be machined from way to interlock with each other, as is well known in the field.
For example, one side forms a tongue while the opposite side forms a shaped groove adapted to receive a tongue of the adjacent slat.

Preferably, the slats are generally made of raw wood allowing get a so-called massive floor.

Preferably, the slats may also comprise an agglomerate of wood of which only the visible surface will consist of a layer of raw wood.
The obtained floor is called engineering type floor.

More preferably, the wood species used for the manufacture a floor are selected from red oak, white oak, maple, plain, the ash, cherry, birch, beech, cherry, walnut, hickory, I'andiroba, bloodwood, cabreuva (Santos Mahogany), cumaru, eucalyptus, Ipe, the

6 jatoba, kempas, massaranduba, mesquite, muiracatiara, rosewood, sapele, sucupira, tamarindo, tauari, and tigerwood (Goncalo Alves).
Other wood species found in North America or elsewhere (wood exotic) can be used without departing from the scope of this invention.

The method according to the invention comprises the following steps:
at. apply on the sides of the lath at least one layer of first antibacterial composition;
b. apply on the underside of the lath at least one layer a second antibacterial composition; and vs. apply on the upper side of the slat at least one composition of a third antibacterial composition.

Steps a, b and / or c of the process according to the invention can be carried out in the order indicated, in a different order or simultaneously.

For example, the sides of the slat can be treated before the faces or same time. Preferably, the sides and the underside will be treated before the upper face.
Preferably, the number of layers of antibacterial compositions is variable depending on the side or the sides treated. For example, the underside and the sides of the slat may receive a single antibacterial layer, that the Visible upper side will receive up to 9 layers.
Preferably, the application of the antibacterial compositions is by spreading, for example with a roller (rubber type) or a brush, or by diffusion (spray).

7 Preferably, a spray for the application on the sides will be used in the as its sides would not be flat, but would have elements casings such as those described above.

Spreading by roll on the flat faces of the slats is preferable, but the spray could also be used like any other means known to man of career.

Preferably, the antibacterial compositions used in the process may be the same or different depending on the side or the treated side.
Preferably, the antibacterial compositions used in the process are a mixture of a paint or stain, a coating such as a varnish, a sealer and / or a seal, with a certain amount of agent anti-bacterial.

The coatings used are selected from those well known to the man of art.
For example, there may be mentioned the varnish 100% polyurethane solid UV
marketed by VALSPAR CORPORATION (USA).
Preferably, the upper face of the slat will be covered with a varnish and / or a dye, comprising the antibacterial agent.

The lower face of the batten and the sides may for example be covered with an antimicrobial sealant.

The antibacterial agent used is chosen from those known to those skilled in the art.
We examples include, but are not limited to, compounds such as halogenated, organometallic, quaternary ammonium, phenolic compounds, metal salts, heterocyclic amines, formaldehyde or organo sulfur.

8 Among the usable substances, mention may also be made of generators or donor of formaldehyde such as iminozolidinyl urea, diazolidinyl urea, and hexahydrotriazine.

Preferably, the antimicrobial agent used may be those sold by TROY CORPORATION (USA) under the Homeshield brand.
The invention is not limited to the nature of the bactericidal compounds used.

The invention also covers an antibacterial wood slat obtained by the process described above including the preferred elements cited.

The invention also covers an antibacterial wood slat intended to be assembled with other antibacterial wood slats to form a floor antibacterial. The wood slat includes an adequate amount of at least one antibacterial agent on the lower and upper surfaces and on the four sides of the lath. The agent used is any known agent of Art such than those described above.

The invention also covers an antibacterial wood floor obtained by the combination of a plurality of antibacterial wood slats such as those described above.

The invention also covers the use of a plurality of slats antibacterial such as those defined above, to form a floor or any other elements of constructions requiring the association of wooden slats such one wall or ceiling of paneling, stairs, etc.

The slats can be assembled according to known assembly methods as :
- nailed according to the conventional method;

9 - glued integrally; or - floated (application of adhesive on the tongue and in the groove).
EXAMPLES: Mildew Resistance Tests (mildew) Substrates:
An assessment of late blight resistance was performed on both cards Leneta and on an oak substrate by applying two tests different.

Antibacterial agent:
The bactericide used is Polyphase - AF1, comprising 40% minimum of Butyl carbamate 3-iodo-2-propynyl. The characteristics of this product are available on the Canadian Regulatory Agency's website.
Health Canada's Pest Management (Ministry of Health) at http: // pr-rp.pmra-arla.gc.ca/PR SOL / pr web.ve2? p ukid = 8531 The agent is mixed with a coating composition with a concentration between 0 and 1.0% by weight of the final concentration of composition.
Test 1: Mildew Resistance Test (Troy Standard Test 1.4B) Samples of substrates 1 inch apart are cut before being placed in a petri dish containing malt agar solidified and sown with a combination of Aspergillus piger (ATTC # 9642) and Penecillium sp. Fungal (ATTC
# 122667) as organisms. The petri is then incubated for a period of 7 days at a temperature of 28 C.

Aspergillus piger and Penecillium sp. Fungal are common mushrooms that we often meet in the disfigurement of interior coatings.

Test 2: Mold Chamber (Troy Standard Test 1.3.1 A) Samples are tested against mildew resistance according to the test ASTM
D3273-00.

5 The ASTM D3273-00 Standard Test Method is used to measure the resistance of an inner liner to mold formation in a indoor environment under difficult conditions. His official name is:
Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber. During this test method

10 normalized, the inner liner evaluated for strength to the mold is applied to a panel measuring 75 x 100 mm (3 x 4 in). One or many of these panels are hanging over a non intercalation sterile inoculated with three specific types of mold spores. The signs are kept for four weeks in an environment where the relative humidity is 95 to 98% and the temperature is 32 C (90 F).
Each week, the samples are visually inspected to detect the mold formation. The results of the test are indicated on a scale of zero to ten, where ten corresponds to the absence of mold on the surface of the coating.
In test 2, the organisms tested are:
Aspergillus piger (ATCC # 6275), - Aureobasidium pullulans (ATCC # 9348), and - Penicillium sp. (ATCC # 12667) Test 2 was performed only on an oak substrate.

The results of tests 1 and 2 are shown in Table 1 below. These results demonstrate the effectiveness of the antibacterial coating on substrates of oak at very low concentrations of antibacterial agent.

11 Leneta Oak Oak (test 1) (test 1) (test 2) Virgo - 5 0 AF1 -0% 5 5 10 AF1 -0.1% 1 0 10 AF1 - 0.25% 0 0 10 AF1 - 0.5% 0 0 10 AF1 - 0.75% 0 0 10 AF1-1.0% - 0 10 Although preferred embodiments of the invention have been described in detail above, the invention is not limited to these modes of production.
Changes and modifications could actually be made by a paid in the field without departing from the framework or the spirit of the invention.

Claims (5)

1. A method of antibacterial treatment of a wooden slat intended to be assembled with other treated wood slats to form a floor antibacterial material, the wood slat comprising an upper face intended for form an upper surface of the floor; a lower face intended to form a lower surface of the floor; and four opposite sides two by two and for each of them to receive one of the sides of an adjacent slat during the training floor; said method comprising the following steps:
at. apply on the sides of the lath at least one layer of first antibacterial composition;
b. apply on the underside of the lath at least one layer a second antibacterial composition; and vs. apply on the upper side of the slat at least one composition of a third antibacterial composition;
steps a), b) and / or c) having an interchangeable order or being made of simultaneous way. 2. An antibacterial wood slat, said slat being obtained by the process according to claim 1. 3. An antibacterial wood batten intended to be assembled with other antibacterial wood slats to form an antibacterial floor, said lath of wood including:
an upper face intended to form an upper surface of the floor;
a lower face for forming a lower surface of the floor;
four opposite sides two by two and intended each of them to receive one of the sides of an adjacent slat during the formation of the floor; and an adequate amount of at least one antibacterial agent present on the lower and upper faces and on the four sides of the batten. 4. Antibacterial wood flooring obtained by combining a plurality of antibacterial wood slats as defined in claim 2 or 3. 5. Use of a plurality of antibacterial slats such as those defined in claims 2 or 3 to form an antibacterial floor.