Soluble Articles and Manufacture and Disposal Thereof

Abstract

A cotton bud, in which a shaft is made from rolled dissolvable paper and the buds at the ends comprise entangled dissolvable cotton wool type fibres.

Claims

1. A cotton bud, in which a shaft is made from rolled dissolvable paper and the buds at the ends comprise entangled dissolvable cotton wool type fibres.

2. A cotton bud according to claim 1, in which the hollow shaft contains further compressed entangled paper fibres which can be pulled out when the existing bud needs to be refreshed when in use.

3. A cotton bud according to claim 1 or claim 2, in which the compressed fibres have pre-scored breaks in order to break off the used part once the fresh part has been pulled out.

4. A cotton bud according to any preceding Claim, in which the dissolvable paper of the shaft is carboxy methyl cellulose.

5. A cotton bud according to any preceding Claim, in which the shaft is coated with an appropriate soluble coating in order to provide added stiffness and endurance.

6. A cotton bud according to any one of claims 1 to 4, in which the rolled paper can be a multilayer paper held together by dissolvable glue.

7. A method of making an absorbent cotton wool type material comprising the steps of: a) creating a blend of water soluble fibres; b) subjecting the fibres to rotational motion in a confined chamber; and c) carding the fibre conglomerations created to disentangle and intermix the fibres.

8. A method according to claim 7, in which the soluble fibre is comprised of sodium carboxyl methyl cellulose, wood pulp or combinations thereof.

9. A method according to claim 7 or claim 8, in which the starting material is 10 point (252 gsm) Facestock calendered water soluble paper.

10. A method according to any one of claims 7 to 9, in which the confined chamber is loosely packed with the soluble fibres to allow aeration of the fibres on mixing.

11. A method according to any one of claims 7 to 10, in which further soluble material can be added to the soluble fibres to create the desired material properties.

12. A method according to any one of claims 7 to 11, in which rotational blending with high speed cutting blades occurs for approximately 1 minute which is repeated a number of times to achieve the required result.

13. A method according to any one of claims 7 to 12, in which the carding of the conglomerations to create the final product, the fibres can be mixed with in other fibres in order to achieve longevity for the absorbent material when exposed to fluid or alter the material properties.

14. An absorbent fibre material made according to the method in any one of claims 7 to 14.

15. An absorbent pad which comprises an outer water impermeable layer and the inner water permeable layer between which there is contained soluble fibres.

16. An absorbent pad according to claim 15, in which the soluble fibre is comprised of sodium carboxyl methyl cellulose, wood pulp or combinations thereof.

17. An absorbent pad according to claim 15 or claim 16, in which the starting material is 10 point (252 gsm) Facestock calendered water soluble paper.

18. An absorbent pad according to any one of claims 15 to 17, in which the soluble fibres are advantageously entangled dissolvable fibres.

19. An absorbent pad according to any one of claims 15 to 18, in which the absorbent properties are improved by the addition ofpolyacrylate either by mixing or as a layer.

20. An absorbent pad according to any one of claims 15 to 19, in which the inner and outer layers are made from water soluble material preferably water-soluble plastics material or soluble fabric.

21. An absorbent pad according to any one of claims 15 to 20, in which the outer and inner layer comprises of a direct material that dissolves or disperses above 60° C. in water.

22. An absorbent pad according to any one of claims 15 to 20, in which the outer layer comprises direct thermal soluble paper with an integrated water proof membrane.

23. An absorbent pad according to any one of claims 15 to 22, in which the pad includes anti-bacterial substances.

24. An absorbent pad according to any one of claims 15 to 23, in which the intended outer layer of the pad comprises soluble fabric and/or is additionally be coated with adhesive to hold it to other external items.

25. An absorbent pad according to any one of claims 15 to 24, in which the pad is one of the following sanitary towel, nappy, diaper, incontinence pads and mattress protectors.

26. An absorbent pad according to any one of claims 15 to 25, in which the pads are equipped with the necessary additional features for the relevant application to make them work such as adhesive strips in the case of nappies, incontinence pads and sanitary towels.

27. An absorbent pad according to claim 26, in which the adhesive is selected from one that is water-soluble and additional straps added to the outer layer to achieve attachment will again be of the same material as the outer layer.

28. A sanitary macerator comprising a chamber which is divided into two parts, a first part contains an area in which the material to be macerated is placed which is closed by a cover and a second part which contains a macerator.

29. A sanitary macerator according to claim 28, in which closure of the cover allows operation of the macerator.

30. A sanitary macerator according to claim 28 or claim 29, in which the macerator has an inlet which lets hot water into the first part of the chamber and an outlet which removes the macerated waste from the second part.

31. A sanitary macerator according to any one of claims 28 to 30, in which the inlet has a valve that allows in water to the macerator with a temperature above a predetermined level.

32. A sanitary macerator according to any one of claims 28 to 31, in which the water inlet has a heater included with it to ensure the water supplied is to a predetermined temperature.

33. A sanitary macerator according to any one of claims 28 to 32, in which the first part is above the second part allowing gravity to move the waste through the macerator.

34. A sanitary macerator according to any one of claims 28 to 33, in which the macerator has a control device that operates the macerator once the contents of the first part has been exposed to heated water for a predetermined period of time.

35. A sanitary macerator according to any one of claims 28 to 34, in which once the contents of the macerator has been cleared further water is allowed in though the valve to clean and flush the macerator.

36. A sanitary macerator according to any one of claims 28 to 35, in which an operating control operates the various parts of the process to maximum efficiency and a sensor is provided to check if the soiled articles have dissolved before maceration starts.

Description

[0044] Examples made in accordance with the present invention will now be described hereinbelow with reference to the attached drawings, in which:

[0045] FIG. 1 is a perspective view of a cotton bud according to a first aspect of the present invention;

[0046] FIG. 2 is a cross-sectional view along Plane A of the cotton bud in FIG. 1;

[0047] FIG. 3 is a cross-sectional view of the cotton bud in FIG. 1 along plane B;

[0048] FIG. 4 is a sectional view of a pad according to a fourth aspect of the present invention;

[0049] FIG. 5 is a top view of a sanitary towel/panty liner according to a fourth aspect of the present invention;

[0050] FIG. 6 is a top view of a nappy/diaper/incontinence pad according to a fourth aspect of the present invention;

[0051] FIG. 7 is a top view of a mattress protector according to a fourth aspect of the present invention; and

[0052] FIG. 8 shows a side sectional view of a macerator according to a fifth aspect of the present invention.

[0053] FIG. 1 shows a perspective view of a cotton bud comprising a shaft 10 with buds 12 at either end. The buds 12 are secured to the shaft 10 either by external glue or alternatively through attachment to compressed fibre in the shaft 10. The cotton buds 12 are made from entangled dissolvable paper fibres with cotton wool like properties. The shaft 10 is made from rolled dissolvable paper. The fibres of the buds 12 and the paper of the shaft 10 is made preferably from carboxy methyl cellulose and/or wood fibre.

[0054] FIG. 2 shows a cross-section along plane A in FIG. 1 through the shaft 10 of the cotton bud. The shaft 10 comprises rolled dissolvable paper which may have multiple layers with a width of 10a, which are glued together by a water soluble glue. The exterior of the shaft 10 may be coated with a suitable dissolving material to provide extra strength and rigidity. The centre 14 of the shaft 10 is hollow. This can be filled with compressed entangled dissolvable fibres.

[0055] FIG. 3 shows a cross-sectional view along plane B in FIG. 1 of the cotton bud showing the shaft 10 containing a series of compressed buds 18 which are separated by pre-scorings 16 to enable these to be broken when a fresh bud 12 upon use is pulled out of the centre 14 of the shaft 10. There is a break 20 in the middle as both halves of the shaft 10 contain compressed entangled fibre material for the buds 12 at each end.

[0056] In use the cotton bud, once the bud 12 becomes soiled can have the bud 12 pulled off pulling out of the shaft 10 a further bud 12. The new bud 12 is separated from the old bud 12 by the pre-scoring 18. Owing to the dissolvable nature of the bud 12, this can easily be disposed of by washing down a sink or a lavatory with no likelihood of blockage.

[0057] In an example according to a second and third aspect of the present invention raw material/feedstock namely 10 pt (252 gsm) Facestock (calendered water soluble paper) comprised of sodium carboxyl methyl cellulose and wood pulp was provided. The feedstock was placed in a 400 W food blender with a gearless motor. The packing of the fibre material into the blender was loose to facilitate aeration. The feedstock was blended for 1 minute and allowed to settle. This was repeated twice to produce the required consistency of the product. The product is comprised of loose blended cotton wool type material.

[0058] A preferred embodiment of the object is to form 1 inch balls of cotton wool type material, i.e. a cotton wool type ball, which weigh half an ounce.

[0059] A cotton wool type ball produced by this method was able to mop up small water spillages without losing form. Once the ball was placed in a glass of water dissolution occurred within 1 minute and with slight agitation complete dissolution was achieved, leaving no large pieces of fibre material.

[0060] FIG. 4 shows a cross-section of a dissolvable absorbent pad 110 comprising an inner layer 112 and an outer layer 114. The inner layer 112 is joined to the outer layer 114 at edge 116. This join 116 can be through adhesion or welding and goes for all the way round the pad 110. The pad 110 may have multiple planar geometries depending in its intended use. Between the inner layer 112 and the outer layer 114 is held soluble paper fibres 18. The soluble paper fibres 118 are preferably entangled and held together as a mesh. The fibres 118 may contain additional elements treated with anti-microbial compounds alternatively inner layer 112 or outer layer 114 may also be treated.

[0061] The outer layer 114 is made water impermeable by the addition of a layer 120 and is intended to hold water absorbed by the soluble fibres 118 though the inner layer 112 from reaching the outside of the pad 110. The inner layer 112 is advantageously semi-permeable from the outside to the inside. This enables water or moisture to be absorbed through the inner layer 112 and held by the soluble fibres 118.

[0062] The outer and inner layers 112, 114 can be made of soluble material such that when the pad 110 is placed in water it dissolves as a whole. This leads to no likelihood of the blocking drains and easy dissolution if placed in landfill. In the case of use in hospital ideally these layers 112, 114 dissolve at a higher temperature. This means that while in general use they will keep absorb fluids such as blood, urine or other bodily fluids intact and are only dissolved when placed in the appropriate cleansing apparatus for disposal.

[0063] The products shown in FIGS. 5 to 7 all have the sectional structure shown in FIG. 4.

[0064] FIG. 5 shows a plan view of a sanitary towel/panty liner 130. The sanitary towel 130 has the structure described in FIG. 4 with the soluble fibres contained in the central part 132 of the sanitary towel 130 and welded edge 133 matches the desired contour of the product. Wings 134 are provided on the sanitary towel 130 for the attachment of adhesive portions 136 for use. The outer layer 114 in this case can be coated with an adhesive to hold in on the pants.

[0065] FIG. 6 shows a nappy or incontinence pack 140. The nappy 140 again has the structure described in FIG. 4 with the soluble fibres contained in the central part 132 of the nappy 140 and welded round the edge 146 which matches the desired contour of the product. The nappy 140 is equipped with soluble adhesive tabs 48 for fitting to the baby or adult when in use.

[0066] FIG. 7 shows a plan view of a bed sheet 150 which again has the structure described in FIG. 4 with the soluble fibres contained in the central part 152 of the sheet 150 and welded round the edge 154 which matches the desired contour of the product. The welded outer edge 154 can be larger in this case or have added features such as elastic edges to fit on a bed.

[0067] FIG. 8 shows a side view of a macerator 210 according to a fifth aspect of the present invention with a chamber 212 divided into two parts by separator 214. The top part of the chamber has a door 216 hinged at one corner 218 to enable the door 216 to be lifted up by handle 218. A pipe 222 supplying hot water flows into the top part 224 through valve 226. The macerator 228 is housed in the lower part 228 of the chamber 212. The macerated product is expelled through pipe 230 into the sewage system.

[0068] In operation a handle 220 is lifted up and the soiled article comprising a bed liner or suchlike that dissolves at a higher temperature, preferably 60° C., is placed in chamber 212. The valve 226 is opened and hot water from pipe 222 flows into the chamber 212. After a predetermined time providing the door 216 is closed the macerator 228 is operated and the resultant sewage is expelled through pipe 230. Further water then flows in through valve 226 to assist with flushing when required and to clean the macerator. Ideally a control operates the various parts of this process to maximum efficiency and there may be a sensor to check if the soiled articles have dissolved before maceration starts.