GB2442542A - Door having an external anti-microbial cover - Google Patents
Door having an external anti-microbial cover Download PDFInfo
- Publication number
- GB2442542A GB2442542A GB0705477A GB0705477A GB2442542A GB 2442542 A GB2442542 A GB 2442542A GB 0705477 A GB0705477 A GB 0705477A GB 0705477 A GB0705477 A GB 0705477A GB 2442542 A GB2442542 A GB 2442542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- door
- cover
- door according
- slit
- thermoplastic polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000000845 anti-microbial effect Effects 0.000 title abstract description 7
- 239000004599 antimicrobial Substances 0.000 title abstract description 7
- 229910052709 silver Inorganic materials 0.000 claims abstract description 17
- 239000004332 silver Substances 0.000 claims abstract description 17
- -1 silver ions Chemical class 0.000 claims abstract description 10
- 239000011521 glass Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 11
- 239000004416 thermosoftening plastic Substances 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 3
- 238000009757 thermoplastic moulding Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract 2
- 241000894006 Bacteria Species 0.000 description 9
- 239000000654 additive Substances 0.000 description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 8
- 230000000996 additive effect Effects 0.000 description 8
- 244000005700 microbiome Species 0.000 description 6
- 230000000844 anti-bacterial effect Effects 0.000 description 5
- 241000233866 Fungi Species 0.000 description 4
- 230000003115 biocidal effect Effects 0.000 description 4
- 239000000645 desinfectant Substances 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 206010041925 Staphylococcal infections Diseases 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920005669 high impact polystyrene Polymers 0.000 description 3
- 239000004797 high-impact polystyrene Substances 0.000 description 3
- 208000015688 methicillin-resistant staphylococcus aureus infectious disease Diseases 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 208000035143 Bacterial infection Diseases 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 208000031888 Mycoses Diseases 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 229940088710 antibiotic agent Drugs 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 206010067484 Adverse reaction Diseases 0.000 description 1
- 241000193163 Clostridioides difficile Species 0.000 description 1
- 206010009657 Clostridium difficile colitis Diseases 0.000 description 1
- 208000019399 Colonic disease Diseases 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 206010012735 Diarrhoea Diseases 0.000 description 1
- 206010017533 Fungal infection Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 208000003100 Pseudomembranous Enterocolitis Diseases 0.000 description 1
- 206010037128 Pseudomembranous colitis Diseases 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 108010059993 Vancomycin Proteins 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000006838 adverse reaction Effects 0.000 description 1
- 208000022362 bacterial infectious disease Diseases 0.000 description 1
- 239000012867 bioactive agent Substances 0.000 description 1
- 239000005313 bioactive glass Substances 0.000 description 1
- 239000003139 biocide Substances 0.000 description 1
- 230000004656 cell transport Effects 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229960000282 metronidazole Drugs 0.000 description 1
- VAOCPAMSLUNLGC-UHFFFAOYSA-N metronidazole Chemical compound CC1=NC=C([N+]([O-])=O)N1CCO VAOCPAMSLUNLGC-UHFFFAOYSA-N 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 229960003165 vancomycin Drugs 0.000 description 1
- MYPYJXKWCTUITO-UHFFFAOYSA-N vancomycin Natural products O1C(C(=C2)Cl)=CC=C2C(O)C(C(NC(C2=CC(O)=CC(O)=C2C=2C(O)=CC=C3C=2)C(O)=O)=O)NC(=O)C3NC(=O)C2NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(CC(C)C)NC)C(O)C(C=C3Cl)=CC=C3OC3=CC2=CC1=C3OC1OC(CO)C(O)C(O)C1OC1CC(C)(N)C(O)C(C)O1 MYPYJXKWCTUITO-UHFFFAOYSA-N 0.000 description 1
- MYPYJXKWCTUITO-LYRMYLQWSA-O vancomycin(1+) Chemical compound O([C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=C2C=C3C=C1OC1=CC=C(C=C1Cl)[C@@H](O)[C@H](C(N[C@@H](CC(N)=O)C(=O)N[C@H]3C(=O)N[C@H]1C(=O)N[C@H](C(N[C@@H](C3=CC(O)=CC(O)=C3C=3C(O)=CC=C1C=3)C([O-])=O)=O)[C@H](O)C1=CC=C(C(=C1)Cl)O2)=O)NC(=O)[C@@H](CC(C)C)[NH2+]C)[C@H]1C[C@](C)([NH3+])[C@H](O)[C@H](C)O1 MYPYJXKWCTUITO-LYRMYLQWSA-O 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
- A61L2/232—Solid substances, e.g. granules, powders, blocks, tablets layered or coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
- A61L2/23—Solid substances, e.g. granules, powders, blocks, tablets
- A61L2/238—Metals or alloys, e.g. oligodynamic metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B1/00—Knobs or handles for wings; Knobs, handles, or press buttons for locks or latches on wings
- E05B1/0069—Sanitary doorknobs or handles, e.g. comprising a disinfectant
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
- E06B7/285—Finger plates
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- General Chemical & Material Sciences (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Plant Pathology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
A fingerplate 4 and/or a door handle cover 3 incorporates an antimicrobial substance in the form of glass particles which release silver ions (Ag+). The antimicrobial substance is incorporated into the thermoplastic moulding material. The cover may be of tubular form with a longitudinal slit to assist application to the door handle.
Description
DOORS
TECHNICAL FIELD OF THE INVENTION
This invention relates to doors, and to the problem of reducing the everyday risk of cross-infection by micro-organisms.
BACKGROUND
Controlling the spread of diseases caused by bacteria and fungal infections is a major problem in hospitals, and indeed, in other areas to whicti people have access. The emergence of bacteria which are resistant to most known antibiotics is a serious problem worldwide. Many bacterial diseases such as MRSA, clostridium difficile and certain strains of e. coil can prove to be fatal, and are easily acquired by direct skin contact with surfaces contaminated with these micro-organisms. C. difticile causes a range of diseases from antibiotic-associated diarrhoea to a life-threatening colon disease called pseudomembranous colitis, and presents a particular problem for healthcare professionals because it can only be treated with two antibiotics, metronidazole and vancomycin, and there is concern that these too will soon become ineffective. Such diseases are easily acquired by direct skin contact with surfaces contaminated with the bacteria, and a wide variety of fungal diseases can also be propagated in a similar manner.
Common hygiene advice aimed at reducing the spread of such diseases is to practice frequent hand washing, preferably using disinfectant solutions, but although this remains good practice it can never be completely effective no matter how diligently it is camed out. For example, if someone goes to the toilet in a restaurant and washes their hands as advised they can easily pick up new infections as they leave the toilet area.
A significant number of people suffer allergic reactions to common disinfectant solutions, and many more people are liable to encounter adverse reactions with prolonged and repeated skin contact with these agents. Thus, measures which involve securing contact elements to a door as proposed in GB 2 402 622 A, which comprise a porous fibrous material saturated with a disinfecting agent, are themselves likely to give rise to health and safety issues. In addition, most common disinfectants have a very limited lifespan, measured in hours or days, so that they require constant maintenance to maintain their effectiveness.
The addition of various bioactive agents to moulded thermoplastic articles in order to combat the growth of micro-organisms on the thermoplastic surfaces is known. For example, US 2004/0137075 Al discloses the use of a bioactive glass as an additive for polymers, which does not contain any heavy metals. Non-specific biocidal polymers are also used in various injection moulded plastic items, well known examples being 2,4,4'-trichloro-2'-hydroxydiphenol ether, or 5-chloro-2-phenol (2,4 dichiorophenoxy) as sold under the trademark Microban, by Microban Products Company, Huntersville, N.C. However, many such agents require regular surface activation (e.g washing with water) to maintain their effectiveness, and show a marked reduction in antibacterial activity with time.
It is widely known that silver, in the form of metallic silver or silver salts, is toxic to micro-organisms. US 4 849 223 discloses an antimicrobial coating composition for use in medical applications which includes silver as the antimicrobial agent. GB 2 427 139 A discloses an antimicrobial paint which contains 0.2% by weight of a silver-containing additive.
The present invention seeks to provide a new and inventive way of reducing the spread of infections through hand transmission and which is highly effective against antibiotic-resistant bacteria for a substantial period without requiring further attention.
SUMMARY OF THE INVENTION
The present invention proposes a door having an area of its external surface provided with a cover moulded of a thermoplastic polymer incorporating a hydrolysable matrix which releases silver ions (Ag+).
Heavy metal ions such as silver interfere with, and may block, the cellular transport mechanisms of bacteria and other micro-organisms, resulting in their rapid destruction. The ions may also cause similar effects in many yeasts and fungi, although their effect on the tissue cells of higher organisms such as humans is benign.
The hydrolysable matrix may be added to the thermoplastic polymer in a particulate form. A particularly effective form of hydrolysable matrix comprises partides of glass. Such a matrix is extremely stable to temperatures beyond 500 C, and can withstand extreme acid or alkaline conditions without significantly reducing the release of the silver ions. The use of a hydrolysable glass matrix also enables a high concentration of silver ions in a highly active form to be maintained at the surface of the thermoplastic polymer For optimum effect against known pathogenic bacteria the silver-containing matrix is preferably added to the thermosetting plastic in a proportion of between 2% and 10% by weight, the preferred proportion being about 6% by weight.
In one embodiment the cover may take the form of a fingerplate.
In another embodiment the cover may be shaped to fit over a door handle, and may, for example, be of tubular form with a slit extending along at least part of its length.
BRIEF DESCRIPTION OF THE DRAWINGS
The following description and the accompanying drawings referred to therein are included by way of non-limiting example in order to illustrate how the invention may be put into practice. In the drawings: Figure 1 is a general view of a door in accordance with the invention; Figure 2 is a front view of a first embodiment of a door cover in the form of finger plate for attachment to the door Figure 3 is a side view of a second embodiment of a door cover in the form of a handle cover for the door; and Figure 5 is a side view of another form of the handle cover.
DETAILED DESCRIPTION OF THE DRAWINGS
Fig. I shows one side of a door 1 which is hung in a doorway through which people can pass. By way of example, the invention may be applied to a toilet door, although it will be appreciated that the invention may advantageously be applied to any door, whether in a public building, in commercial premises, in the home, on board a ship, etc. It should also be noted that although only one side of the door is shown and described the invention may advantageously be applied to both sides of the door.
The door I is hung on hinges 2 and may be opened and closed in known manner using a lever-type handle 3. It has been found that when using a door hand contact is most frequently made with two specific areas.
Firstly, hand contact is made directly with the door handle 3 during opening and closing of the door. The second common area of hand contact is made in an area immediately above the door handle. Indeed, this can cause wear and discolouration of the door and for this reason it is known to protect the area by attaching a plate 4 to the door, commonly known as a fingerplate.
The fingerplate, which is shown in Fig. 2, is a flat elongate panel 10 which is moulded of a thermoplastic such as polyurethane, high impact polystyrene (HIPS) or polyvinyl chloride (PVC). The fingerplate may be attached to the door by means of a self-adhesive layer applied to the rear face of the panel, protected by a peetable backing prior to use. By introducing known colourants into the thermoplastic the fingerplate may be moulded in a range of colours. The thermoplastic incorporates an antibacterial additive which is effective against pathogenic bacteria such e. co/i and MRSA. When anyone touches the fingerplate 10 any bacteria or fungi transferred to the door will quickly be rendered inactive, reducing or even eliminating the risk of transmission to other users.
Fig. 3 shows an anti-microbial cover 12 WhiCh is applied to the door handle 3. The cover is of tubular form and is provided with a single slit 13 extending helically from end-to-end. The cover is moulded of a flexible resilient thermoplastic such as polyvinyl chloride (PVC), so that the cover tends to return to the helical configuration in which it was manufactured.
The thermoplastic moulding material again includes an antibacterial additive as described below, and may incorporate known colourants or other additives. The cover may easily be applied to the lever portion of the door handle by twisting the cover in a direction which tends to unwind it. When in place, the cover firmly grips the handle due to its resilient nature. When anyone grips the cover during use of the handle any bacteria or fungi transferred to the handle are destroyed.
The cover may be moulded in any convenient shape to fit over and grip the handle, depending on the shape of the handle. For example, the cover 14 shown in Fig. 4 is tubular with a straight end-to-end slit 15. The cover could again be formed of polyvinyl chloride (PVC) with an anti-microbial additive. This form of cover is less flexible than the cover shown in Fig. 3 but is easier to apply to a handle of the kind which is fixed to the door at both ends, for example, simply by opening up the slit 15 to insert the handle.
In each of the above embodiments the fingerplate or handle cover incorporates an additive which releases silver (Ag ) ions. A suitable additive for HIPS is Bactiglas AM 92667, and a suitable additive for PVC is Bactiglas AM 93456. The silver ions are held in particles of a hydrolysable glass matrix which is extremely stable to temperatures beyond 500 C and protects the ions during thermal processing of the plastic. The glass particles are thoroughly mixed into the thermoplastic moulding material, in a proportion of about 6% by weight, to achieve a uniform distribution. Once the plastic is set, in the presence of minute amounts of moisture silver ions are released from the surface of the plastic at a continuous but extremely slow rate. The slow release of Ag+ ions acts as a biocide which interrupts the normal membrane functions of bacteria, algae and fungi which come into contact with the door covers, resulting in rapid destruction of the micro-organisms. At the surface of the thermoplastic the released silver ions either complex in solution or loosely combine with the polymer forming active, but highly stable complexes which remain at the surface, holding the silver in an active form.
The silver-glass matrix can withstand extreme acid or alkaline conditions without significantly affecting the release or biocidal activity of the silver ions.
Tests carried out by a Japanese laboratory have shown that the surfaces of the polymer are better than 99.995% effective at destroying MRSA bacteria, e. co/i and s. aureus, which is considerably more effective than other antibacterial surface treatments. Independent tests have also confirmed that the antibacterial properties are not significantly diminished after a period of eight years.
It will be appreciated that the features disclosed herein may be present in any embodiment of the invention in any feasible combination. Whilst the above description places emphasis on those areas which, in combination, are believed to be new, protection is sought for any inventive combination of the features disclosed herein.
* * * * * * * *
Claims (14)
1. A door having an area of its external surface provided with a cover moulded of a thermoplastic polymer incorporating a hydrolysable matrix which releases silver ions (Ag+).
2. A door according to Claim 1 in which the hydrolysable matrix is distributed throughout the thermoplastic polymer in a particulate form.
3. A door according to Claim 2 in which the hydrolysable matrix comprises particles of glass.
4. A door according to Claim 3 in which the particles of glass are incorporated into the thermoplastic polymer in a proportion of between 2% and 10% by weight.
5. A door according to Claim 4 in which the particles of glass are incorporated into the thermoplastic polymer in a proportion of substantially 6% by weight.
6. A door according to any preceding claim in which the cover comprises a fingerplate.
7. A door according to Claim 6 in which the fingerplate is attached to the door by means of an adhesive layer.
8. A door according to any of Claims 1 to 5 in which the cover is shaped to fit over a door handle.
9. A door according to Claim 8 in which the cover is moulded of a flexible resilient thermoplastic.
10. A door according to Claim 9 in which the cover is of tubular form with a slit extending along at least part of its length.
11. A door according to Claim 10 in which the slit extends from end-to-end of the cover.
12. A door according to Claim 11 in which the slit is substantially helical.
13. A door according to Claim 11 in which the slit is substantially straight.
14. A door provided with a cover which is substantially as described with reference to the drawings.
* * * * * * * *
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/GB2007/003743 WO2008040965A2 (en) | 2006-10-04 | 2007-10-03 | Doors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0619584A GB2442440A (en) | 2006-10-04 | 2006-10-04 | Anti-microbial cover for door furniture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0705477D0 GB0705477D0 (en) | 2007-05-02 |
| GB2442542A true GB2442542A (en) | 2008-04-09 |
Family
ID=37453942
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0619584A Withdrawn GB2442440A (en) | 2006-10-04 | 2006-10-04 | Anti-microbial cover for door furniture |
| GB0705477A Withdrawn GB2442542A (en) | 2006-10-04 | 2007-03-22 | Door having an external anti-microbial cover |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0619584A Withdrawn GB2442440A (en) | 2006-10-04 | 2006-10-04 | Anti-microbial cover for door furniture |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2442440A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2472188A (en) * | 2009-07-13 | 2011-02-02 | Stephen Young | Hygienic Cover for Handle |
| DE102010036952A1 (en) * | 2010-08-11 | 2012-02-16 | Paul Hettich Gmbh & Co. Kg | Fitting component for a fitting, for a furniture and / or for a household appliance, a furniture, a household appliance, a drawer slide and a method for producing a fitting component |
| US9283294B2 (en) | 2011-06-16 | 2016-03-15 | Outbreaker Solutions Inc. | Device and method for reducing a transfer of microorganisms by manual contact |
| CH705881A1 (en) * | 2011-12-06 | 2013-06-14 | Planet Gdz Ag | Door seal for a barrier-free door. |
| GB2500400A (en) * | 2012-03-20 | 2013-09-25 | Personnel Hygiene Services Ltd | A user engaged door engagement element with replaceable hygienic contact surface |
| GB2565288A (en) * | 2017-08-07 | 2019-02-13 | Louise Jafrate Tina | Antimicrobial contact panel |
| CN113932359A (en) * | 2021-09-22 | 2022-01-14 | 青岛海尔空调器有限总公司 | Sterilizing fan assembly, method and apparatus |
| GB2618148A (en) * | 2022-04-29 | 2023-11-01 | Anti Ligature Shop Ltd | Anti-ligature keyless access control device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849223A (en) * | 1984-12-28 | 1989-07-18 | Johnson Matthey Public Limited Company | Antimicrobial compositions consisting of metallic silver combined with titanium oxide or tantalum oxide |
| JPH08208854A (en) * | 1995-02-03 | 1996-08-13 | Sekisui Plastics Co Ltd | Thermally shrinkable antimicrobial resin film and instrument covered with the same |
| WO1999047595A1 (en) * | 1998-03-17 | 1999-09-23 | Ineos Acrylics Uk Limited | Biocidal plastic material |
| US20040137075A1 (en) * | 2001-05-08 | 2004-07-15 | Fechner Jorg Hinrich | Polymers containing bioactive glass with antimicrobial effect |
| FR2863171A1 (en) * | 2003-12-08 | 2005-06-10 | Serge Schlee | Anti-microbial handle e.g. for hospital use has core or rod covered with sleeve containing a biocide of mineral or metal salts |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2838168A (en) * | 1954-08-11 | 1958-06-10 | Charles G Schwarz | Protective door plate |
| GB944605A (en) * | 1960-11-24 | 1963-12-18 | Wilbec Plastics Ltd | Improvements in or relating to finger plates and other plate-like articles for attachment to door, wall and other surfaces |
| FR2590797B3 (en) * | 1985-11-29 | 1987-12-11 | Ivan Pitter | ANTIBACTERIAL PROTECTION TO BE APPLIED ON LOCK HANDLES |
| CA2258256C (en) * | 1996-06-05 | 2002-02-26 | Rainer Clover | Inhibition of bacterial growth |
| GB2402622A (en) * | 2003-06-09 | 2004-12-15 | Rentokil Initial Plc | A self-disinfecting device |
| GB0512194D0 (en) * | 2005-06-16 | 2005-07-20 | Ici Plc | Anti-microbial coating compositions |
-
2006
- 2006-10-04 GB GB0619584A patent/GB2442440A/en not_active Withdrawn
-
2007
- 2007-03-22 GB GB0705477A patent/GB2442542A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849223A (en) * | 1984-12-28 | 1989-07-18 | Johnson Matthey Public Limited Company | Antimicrobial compositions consisting of metallic silver combined with titanium oxide or tantalum oxide |
| JPH08208854A (en) * | 1995-02-03 | 1996-08-13 | Sekisui Plastics Co Ltd | Thermally shrinkable antimicrobial resin film and instrument covered with the same |
| WO1999047595A1 (en) * | 1998-03-17 | 1999-09-23 | Ineos Acrylics Uk Limited | Biocidal plastic material |
| US20040137075A1 (en) * | 2001-05-08 | 2004-07-15 | Fechner Jorg Hinrich | Polymers containing bioactive glass with antimicrobial effect |
| FR2863171A1 (en) * | 2003-12-08 | 2005-06-10 | Serge Schlee | Anti-microbial handle e.g. for hospital use has core or rod covered with sleeve containing a biocide of mineral or metal salts |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2442440A (en) | 2008-04-09 |
| GB0705477D0 (en) | 2007-05-02 |
| GB0619584D0 (en) | 2006-11-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |