CN214691034U - Water-soluble bag - Google Patents
Water-soluble bag Download PDFInfo
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- CN214691034U CN214691034U CN202022548457.XU CN202022548457U CN214691034U CN 214691034 U CN214691034 U CN 214691034U CN 202022548457 U CN202022548457 U CN 202022548457U CN 214691034 U CN214691034 U CN 214691034U
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Abstract
The utility model provides a water-soluble bag, it contains water-soluble film and a plurality of cavities that are enveloped by water-soluble film. The utility model provides an aspect such as processability that improves is showing the benefit.
Description
Technical Field
The present invention relates to a water-soluble pouch comprising a water-soluble film and a plurality of chambers enclosed by the water-soluble film, wherein the plurality of chambers are formed by water-soluble films connected to each other in a sealing plane and are separated from each other by sealing portions located in the sealing plane.
Background
Detergent products in the form of unit dose water-soluble sachets (e.g. laundry beads) have become popular in recent years. Such pouches comprise a water-soluble film that surrounds and encloses a detergent composition, such as a laundry detergent composition. Once such pouches are placed in water, the water-soluble film dissolves and releases the detergent composition, thereby achieving cleaning purposes. The water-soluble film is preferably a PVA film (polyvinyl alcohol film).
The detergent product generally comprises a bag made of a water-soluble film having one or more compartments, each containing a detergent formulation containing an active detergent substance for treating textiles, in particular for washing textiles. The presence of multiple chambers makes it possible to separately contain different detergent formulations which in some cases react chemically with each other or which when mixed together are not stable for other reasons. Furthermore, if a plurality of chambers are provided, the consistency of the various detergent formulations within the chambers may be the same or different, preferably being a liquid consistency, such as a liquid, gel-like, paste-like or wax-like consistency, or a solid consistency, such as a powder, granule, free-flowing or solid form.
Water-soluble pouch detergent products have been disclosed in the prior art having a plurality of chambers which may be arranged one on top of the other, i.e. one above the other, or side by side (i.e. adjacent) to each other. For example, the first compartment is located beside the second compartment, while the first compartment at least partially surrounds but does not completely enclose the second compartment. Alternatively, one chamber may be completely surrounded by another chamber. The chambers may be of different sizes and each chamber may contain a laundry composition.
However, the water-soluble pouches known in the art still suffer from disadvantages, for example, during the production of such detergent products, the pouches may encounter difficulties in detaching from the mould due to the inherent stickiness of the water-soluble film material, so that some pouches cannot be normally detached from the mould, thereby causing production line downtime and loss. Accordingly, there remains a need in the art to provide detergent products that improve upon the above deficiencies.
SUMMERY OF THE UTILITY MODEL
The applicant has developed a water-soluble pouch of novel construction which greatly improves the release of the water-soluble pouch from the mould, improves processing and improves production efficiency, whilst still allowing each compartment to be filled with substantially the same volume of detergent formulation, thereby reducing the problem of reduced structural stability due to uneven filling of the compartment (e.g. folding or bending of one side of a larger compartment due to its heavier weight, or leakage during use or storage due to an oversized compartment).
The applicant has surprisingly found that for water-soluble pouches having three or more compartments, if the compartments are identical in spatial shape, the water-soluble pouch easily sticks to the mold during production and processing and cannot be smoothly released. For example, in one particular manufacturing process, a water-soluble pouch is formed by first molding (e.g., by drawing a particular portion of the first film into a mold by vacuum action) the first film to form an open cavity, filling the open cavity with a detergent composition, and then sealing (e.g., by heat sealing, solvent sealing, etc.) the open cavity by overlaying the first film with a second film. The formed water-soluble pouch is then released from the mold by gravity (e.g., by turning the mold containing the water-soluble pouch upside down with the opening facing downward) and/or a demolding tool (e.g., an air pump or a brush). Without being limited by theory, it is believed that the difficulty of detachment may be due to the water-soluble film being tacky, the multiple cavities of the same shape having a regular orientation of the adhesive force of the water-soluble film surrounding the multiple cavities sticking to the mold in the mold, such that the water-soluble pouch does not readily detach from the mold. The applicant has developed a multi-compartment water-soluble pouch of novel structure in which at least two of the plurality of compartments have different spatial shapes, thereby avoiding regular orientation of the adhesive force and greatly improving detachment of the water-soluble pouch from the mold.
Thus, the present invention provides a water-soluble pouch comprising a water-soluble film and a plurality of chambers enclosed by the water-soluble film, wherein the plurality of chambers are formed by water-soluble films connected to each other in a sealing plane and are separated from each other by sealing portions located in the sealing plane, and the plurality of chambers are filled with a detergent formulation, wherein the number of the plurality of chambers is n, wherein n ≧ 3, wherein the plurality of chambers are configured: a) each of the plurality of chambers is adapted to be filled with substantially the same volume of detergent formulation, and b) at least two of the plurality of chambers have different spatial shapes.
The utility model has the advantages of, can improve breaking away from of water-soluble bag and mould greatly, improve the processing property, improve production efficiency.
Another advantage of the present invention is that it improves the release of the water-soluble pouch from the mold while still allowing each chamber to be filled with substantially the same volume of detergent formulation, thereby reducing the problem of reduced structural stability due to uneven chamber fill volume (e.g., folding or bending of the larger chamber side due to heavier weight, or leakage during use or storage due to an oversized chamber).
Another advantage of the present invention is that the water-soluble pouch has a high inherent stability, which can greatly reduce the folding or bending of the water-soluble pouch during the production, storage and use.
In some embodiments, the water-soluble pouch is a unit dose detergent product, in particular the water-soluble pouch is a unit dose detergent product for treating textiles.
In some embodiments, the plurality of chambers are further arranged c) the footprint of each of the plurality of chambers in the sealing plane has substantially the same area, and d) the footprint of at least two of the plurality of chambers in the sealing plane has a different shape.
In some embodiments, the plurality of chambers are further configured such that each of the plurality of chambers has substantially the same volume.
In some embodiments, the plurality of chambers are further configured such that the coverage area of the plurality of chambers in the sealing plane is crescent shaped, droplet shaped, or yin-yang shaped.
In some embodiments, the plurality of chambers are further configured such that a footprint of at least one of the plurality of chambers in the sealing plane is crescent-shaped and a footprint of at least another one of the plurality of chambers in the sealing plane is drop-shaped or yin-yang-shaped.
Preferably, the outer portions of the contours of the plurality of chambers in the sealing plane may at least substantially lie on a common outer perimeter line, which may have a substantially circular, elliptical, square, rectangular or triangular shape.
In some embodiments, the plurality of chambers are further arranged such that the footprint of the plurality of chambers in the sealing plane is axially asymmetric in its entirety, i.e.: the coverage area cannot be imaged onto itself by reflection through one axis of symmetry. Without being limited by theory, it is believed that this arrangement further increases the inherent stability of the water-soluble pouch, thereby further reducing folding or bending of the water-soluble pouch during manufacture, storage and use, and/or, allowing for improved and more uniform dissolution of the film material when the detergent product is used in a wash cycle.
In some embodiments, the sealing portion comprises a central sealing portion, wherein the plurality of chambers are disposed about the central sealing portion. In particular, the central sealing portion comprises at least one point having the following characteristics: the closest distance of the point to each of the plurality of chambers is 1mm to 9mm, preferably 1.2mm to 7mm, more preferably 1.5mm to 5mm, such as 2mm, 2.2mm, 2.5mm, 3mm, 4mm or any interval thereof. The applicant has surprisingly found that the presence of a central sealed portion of a specific size further facilitates the detachment of the water-soluble pouch from the mould, without destroying the intrinsic stability of the water-soluble pouch (i.e. without making it easier to fold or bend).
In some embodiments, the plurality of chambers may be 3, 4, 5, 6, 7, 8, 9, 10 or more, preferably n is 3 to 10, more preferably n is 3 to 7, most preferably n is 3 to 5.
In some embodiments, the detergent formulation is a liquid detergent formulation.
In some embodiments, the plurality of chambers are formed from two layers of water-soluble film connected to each other in a sealing plane.
These and other features of the present invention will become apparent to those skilled in the art upon review of the following detailed description, when taken in conjunction with the appended claims.
Drawings
While the specification concludes with claims particularly pointing out and distinctly claiming the invention, it is believed that the present invention will be better understood from the following description of the drawings.
Fig. 1 shows a schematic view of a water-soluble pouch according to an embodiment of the present invention, wherein fig. 1A shows a perspective view, fig. 1B shows a front view, and fig. 1C shows a side view.
The utility model relates to an explanation of reference numeral:
(FIG. 1):
a water-soluble pouch (1);
a first chamber (11);
a second chamber (12);
a third chamber (13);
a sealing plane (14);
a sealing portion (15);
a central sealing portion (151).
Detailed Description
Definition of
The term "comprising" as used herein means that steps and ingredients other than those specifically mentioned may be added. The term includes the term "consisting of and the term" consisting essentially of. The compositions of the present invention may comprise, consist of, and consist essentially of: the essential elements and limitations described herein, as well as any additional or optional ingredients, components, steps, or limitations described herein.
All percentages, parts and ratios are based on the total weight of the composition of the present invention, unless otherwise specified. Unless otherwise indicated, all weights associated with listed ingredients are based on the active level and, therefore, do not include solvents or by-products that may be included in commercially available materials.
As used herein, an article comprising "a" or "an" when used in a claim is intended to mean one or more of the claimed or described item.
As used herein, the terms "preferred," "preferably," and variations thereof refer to embodiments of the invention that provide certain benefits under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor does it exclude other embodiments from the scope of the invention.
As used herein, the term "sealing plane" refers to the plane in which the first and second layers of water-soluble film are attached to each other after sealing.
As used herein, the term "sealed portion" refers to a portion of the first and second layers of water-soluble films that are interconnected (i.e., fused to each other) after sealing. The first water-soluble film and the second water-soluble film are separated from each other outside the sealed portion, and the space between the separated portions constitutes a plurality of chambers.
As used herein, the term "substantially the same" means that the difference between two values (e.g., weight, area, volume, or volume) compared is no more than 10%, preferably no more than 5%, more preferably no more than 3%, most preferably no more than 1%.
The water-soluble film is soluble or dispersible in water and preferably has a water solubility of at least 50%, preferably at least 75%, or even at least 95%, as measured by the method set forth herein after using a glass filter having a maximum pore size of 20 microns:
50 grams 0.1 grams of the sachet material was added to a pre-weighed 400ml beaker and 245ml 1ml of distilled water was added. It was stirred vigorously for 30 minutes on a magnetic stirrer set at 600 rpm. The mixture was then filtered through a folded qualitative porous glass filter with the specified pore size (maximum 20 microns) described above. The moisture in the collected filtrate was dried by any conventional method and the weight of the remaining material (dissolved or dispersed portion) was determined. The percentage of solubility or dispersibility can then be calculated.
Preferred membrane materials are preferably polymeric materials. Film materials may be obtained, for example, by casting, blow molding, extrusion or blow extrusion of polymeric materials, as is known in the art. Preferred polymers, copolymers or derivatives thereof suitable for use as the membrane material are selected from the group consisting of polyvinyl alcohols, polyvinyl pyrrolidones, polyalkylene oxides, acrylamides, acrylic acids, celluloses, cellulose ethers, cellulose esters, cellulose amides, polyvinyl acetates, polycarboxylic acids and salts, polyaminoacids or peptides, polyamides, polyacrylamides, copolymers of maleic/acrylic acids, polysaccharides including starch and gelatin, natural gums such as xanthan and carrageenan. More preferred polymers are selected from the group consisting of polyacrylates and water-soluble acrylate copolymers, methylcellulose, sodium carboxymethylcellulose, dextrin, ethylcellulose, hydroxyethylcellulose, hydroxypropylmethylcellulose, maltodextrin, polymethacrylates, and most preferably from the group consisting of polyvinyl alcohol (PVA), polyvinyl alcohol copolymers and Hydroxypropylmethylcellulose (HPMC), and combinations thereof. Preferably, the content of polymer, such as PVA polymer, in the membrane material is at least 60%. The polymer may have any weight average molecular weight, preferably from about 1000 to 1,000,000, more preferably from about 10,000 to 300,000, and still more preferably from about 20,000 to 150,000. Preferred membranes are supplied by Monosol, for example M8630, M8900, M8779, M8310 (see US 6166117 and US 6787512).
The detergent compositions of the present invention may comprise any suitable component. The compositions of the present invention may comprise from about 1% to 80% by weight of a surfactant. The above composition preferably comprises from about 5% to 50% by weight of a surfactant.
The surfactant used may be of the anionic, nonionic, zwitterionic, ampholyte or cationic type or a compatible mixture comprising these types. More preferred surfactants are selected from the group consisting of: anionic surfactants, nonionic surfactants, cationic surfactants, and mixtures thereof. Detergent surfactants useful in the present invention are described in Norris ' U.S. Pat. No. 3,664,961, published 5/23 1972, Laughlin et al, U.S. Pat. No. 3,919,678, published 12/30 1975, Cockrell's U.S. Pat. No. 4,222,905, published 9/16 1980, and Murphy's U.S. Pat. No. 4,239,659, published 12/16 1980. Anionic and nonionic surfactants are preferred.
Useful anionic surfactants themselves can be of several different types. For example, water soluble salts of higher fatty acids, i.e., "soaps", are useful anionic surfactants in the compositions of the present invention. This includes alkali metal soaps such as the sodium, potassium, ammonium and alkylolammonium salts of higher fatty acids containing from about 8 to about 24 carbon atoms, preferably from about 12 to about 18 carbon atoms. Soaps can be made by direct saponification of fats and oils, or by neutralization of free fatty acids. Especially useful are the sodium and potassium salts of mixtures of fatty acids derived from coconut oil and tallow, i.e., sodium or potassium tallow and sodium or potassium coco soap.
Additional anionic surfactants suitable for use in the present invention include water-soluble salts, preferably alkali metal and ammonium salts of organic sulfur reaction products having in their molecular structure an alkyl group containing from about 10 to about 20 carbon atoms and a sulfonic acid or sulfate group. (Included in the term "alkyl" is the alkyl portion of an acyl group). Examples of such synthetic surfactants are a) the sodium, potassium and ammonium salts of alkyl sulfates, especially those obtained by sulfating higher alcohols (C8-C18 carbon atoms), such as those produced by reducing glycerides in tallow or coconut oil; b) sodium, potassium and ammonium salts of alkyl polyethoxylates, especially those wherein the alkyl group contains from 10 to 22, preferably from 12 to 18, carbon atoms and wherein the polyethoxylate chain contains from 1 to 15, preferably from 3 to 9, ethoxylated moieties; and c) sodium and potassium salts of alkylbenzene sulfonic acids in which the alkyl group contains from about 9 to about 15 carbon atoms, in a straight or branched chain configuration, such as those described in U.S. Pat. Nos. 2,220,099 and 2,477,383. Of particular interest are linear alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is from about 11 to 13.
Preferred nonionic surfactants are of the formula R1(OC2H4)nThose of OH, wherein R1Is C10-C16Alkyl or C8-C12Alkylphenyl, and n is from 3 to about 80. Particularly preferred is C12-C15Condensation products of alcohols with about 5 to about 20 moles of ethylene oxide per mole of alcohol.
Fig. 1 illustrates a water soluble pouch (1) according to one embodiment of the present invention comprising a first chamber (11), a second chamber (12) and a third chamber (13), wherein the first chamber (11), the second chamber (12) are crescent shaped and the third chamber (13) is yin-yang shaped. The first chamber (11) and the second chamber (12) have the same spatial shape and wherein the first chamber (11), the second chamber (12) and the third chamber (13) have substantially the same volume and are filled with substantially the same volume of liquid detergent formulation. The sealing plane (14) corresponds to the plane in which the first and second water-soluble films are sealed. The sealing portion (15) is a first water-soluble film and a second water-soluble film bonded to each other after sealing, and includes a central sealing portion (151) surrounded by the first chamber (11), the second chamber (12), and the third chamber (13). The central sealing portion (151) has at least one point which is 2mm to 3mm closest to each of the first chamber (11), the second chamber (12) and the third chamber (13), for example, one point which is about 2.3mm closest to each of the three chambers. The water-soluble pouch (1) according to this embodiment may be prepared by: a) providing a first water-soluble film and a second water-soluble film; b) drawing a specific portion of the first water-soluble film into the mold by vacuum action to form open first, second and third cavities; c) filling the open first, second and third chambers with a detergent composition; d) covering the first film with a second water-soluble film with a suitable amount of water sprayed on the surface thereof so that the first water-soluble film and the second water-soluble film are combined with each other by the interaction of the water and the water-soluble film, and sealing the first, second and third open chambers to form a water-soluble pouch.
The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Rather, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" means "about 40 mm".
While particular embodiments of the present invention have been illustrated and described, it would be obvious to those skilled in the art that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (17)
1. A water-soluble pouch, characterized in that the water-soluble pouch comprises a water-soluble film and a plurality of compartments enclosed by the water-soluble film, wherein the plurality of compartments are formed by water-soluble films connected to one another in a sealing plane and are separated from one another by sealing sections lying in the sealing plane, and the plurality of compartments are filled with a detergent formulation,
wherein the number of the plurality of chambers is n, wherein n is more than or equal to 3,
wherein the plurality of chambers are configured to:
a) each of the plurality of chambers is adapted to be filled with substantially the same volume of detergent formulation, an
b) At least two of the plurality of chambers have different spatial shapes.
2. The water soluble pouch according to claim 1, characterized in that said water soluble pouch is a unit dose detergent product.
3. The water soluble pouch according to claim 1, characterized in that it is a unit dose detergent product for treating textiles.
4. The water soluble pouch according to claim 1, wherein said plurality of chambers are further configured to:
c) the footprint of each of the plurality of chambers in the sealing plane has substantially the same area, an
d) At least two of the plurality of chambers have different shapes of coverage areas in the sealing plane.
5. The water soluble pouch according to claim 1, wherein said plurality of compartments are further arranged such that each of said plurality of compartments has substantially the same volume.
6. The water soluble pouch according to claim 1, wherein said plurality of chambers are further arranged such that the footprint of said plurality of chambers in said sealing plane is crescent shaped, drop shaped or yin and yang shaped.
7. The water soluble pouch according to claim 1, wherein said plurality of chambers are further arranged such that the footprint of at least one of said plurality of chambers in said sealing plane is crescent shaped and the footprint of at least another one of said plurality of chambers in said sealing plane is drop shaped or yin and yang shaped.
8. The water soluble pouch according to claim 1, wherein said plurality of compartments are further arranged such that the footprint of said plurality of compartments in said sealing plane is axially asymmetric in general.
9. The water soluble pouch according to claim 1, wherein said sealed portion comprises a central sealed portion, and wherein said plurality of compartments are disposed about said central sealed portion.
10. The water soluble pouch according to claim 9, characterized in that said central sealed portion comprises at least one point having the following characteristics:
the closest distance of the point to each of the plurality of chambers is 1mm to 9 mm.
11. The water soluble pouch according to claim 9, characterized in that said central sealed portion comprises at least one point having the following characteristics:
the closest distance of the point to each of the plurality of chambers is 1.2mm to 7 mm.
12. The water soluble pouch according to claim 9, characterized in that said central sealed portion comprises at least one point having the following characteristics:
the closest distance of the point to each of the plurality of chambers is 1.5mm to 5 mm.
13. The water soluble pouch according to claim 1, characterized in that n is 3 to 10.
14. The water soluble pouch according to claim 13, characterized in that n is 3 to 7.
15. The water soluble pouch according to claim 14, characterized in that n is 3 to 5.
16. The water-soluble pouch according to claim 1, characterized in that the detergent formulation is a liquid detergent formulation.
17. The water soluble pouch according to any one of claims 1 to 16, characterised in that the plurality of chambers are formed by two layers of water soluble film connected to each other in a sealing plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022548457.XU CN214691034U (en) | 2020-11-06 | 2020-11-06 | Water-soluble bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022548457.XU CN214691034U (en) | 2020-11-06 | 2020-11-06 | Water-soluble bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214691034U true CN214691034U (en) | 2021-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022548457.XU Active CN214691034U (en) | 2020-11-06 | 2020-11-06 | Water-soluble bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214691034U (en) |
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2020
- 2020-11-06 CN CN202022548457.XU patent/CN214691034U/en active Active
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