Bags, in particular garbage bags, with odour control

Abstract

Bag (1), in particular garbage bag, comprising a bag body (2) made of a plastic and / or paper film and a carrier (18) in the form of a planar structure (19) with a large surface area (21) with an odor-controlling substance (22) on its surface, wherein the bag body comprises two side walls (3, 4) which define an opening (16) with their upper edge, are connected to each other at their lateral edges by lateral weld seams (7, 8) and at their lower edge by a bottom or other closure (17) and the carrier is arranged in and attached to the bag body, wherein the carrier (18) is arranged in a strip shape and in the upper half of the bag body (2).

Description

[0001] The invention relates to a bag, in particular a garbage bag, formed from a film of plastic and / or paper, comprising on the inside a carrier with an odor-controlling substance.

[0002] Various approaches to reducing, masking, and otherwise controlling odors in garbage bags are known.

[0003] EP 1 657 187 B 1 relates to a garbage bag made of a plastic film, a biodegradable film, or paper. Within the bag, a carrier layer containing activated carbon (activated carbon patch) is arranged for odor adsorption and adhered to the bag material in sections ranging from 1 cm² to 400 cm². The carrier layer is formed from an aliphatic polyester nonwoven fabric in the form of a square section, for example, 5 cm x 5 cm, and is coated or impregnated with activated carbon.

[0004] A disadvantage is that the odor-adsorbing material is relatively expensive, so usually only a small surface area activated carbon patch is used. This limits the efficiency of odor adsorption. The binding of odor molecules by adsorption to active surfaces can be further restricted by the fact that other substances, which do not contribute to the odor, also bind to the surface and reduce the adsorption capacity.

[0005] Furthermore, the application of fragrances to the inside of garbage bags is a known practice. These fragrances merely mask existing odors, and new, unpleasant smells can develop. Additionally, fragrances have allergenic potential and are often perceived differently by people, sometimes even finding them bothersome.

[0006] Fragrances typically need to be applied as a solution. The solution is applied by spraying it into the bag. With aqueous solutions, some liquid remains in the bag. A disadvantage of this is that the wet bag is prone to bacterial growth. Alternatively, volatile solvents can be used, which can evaporate from the bag. However, volatile solvents can cause problems during manufacturing, particularly requiring occupational safety and explosion protection measures. Furthermore, volatile organic solvents can be an environmental hazard.

[0007] Finally, the application of odor-controlling substances is known; these substances react chemically with odor molecules and convert them into less odorous or odorless substances. The active substances are added to the bag as a powder or liquid. With liquids, the problems mentioned above exist. Powders can collect at the bottom of the bag during use, so that waste accumulates above the active powder, preventing rising odor molecules from coming into contact with the active substance.

[0008] Based on this, the invention aims to provide a bag, in particular a garbage bag, with odor control that does not have the aforementioned disadvantages. In particular, a bag is to be provided that enables effective odor control and has improved manufacturing and application properties.

[0009] The problem is solved by a bag according to claim 1. Advantageous embodiments of the bag are specified in the dependent claims and in the following description.

[0010] The bag according to the invention, in particular a garbage bag, comprises a bag body made of a film of plastic and / or paper and a carrier in the form of a planar structure with a large surface area and an odor-controlling substance on the surface, wherein the bag body comprises two side walls which define an opening with their upper edge, are connected to each other at their lateral edges by lateral weld seams and at their lower edge by a bottom or other closure, and the carrier is arranged in and attached to the bag body, characterized in that the carrier is arranged in a strip shape and in the upper half of the bag body.

[0011] The bag according to the invention comprises a strip-shaped carrier on whose surface the odor-controlling substance is arranged. The strip-shaped carrier is advantageous for the production of the bag. During the production of the bag, the strip-shaped carrier can be fed into a converting machine and welded into the side seams of the bag. For this purpose, the carrier must have a sufficient amount of thermoplastic material. If the carrier is made of nonwoven fabric, it must have enough thermoplastic fibers that are sufficiently plasticized at the sealing temperature when welded to a thermoplastic film of the bag.By placing the carrier containing the odor-controlling substance in the upper half of the bag, it is ensured that odor molecules rising from the bag have a certain probability of coming into contact with the surface of the carrier containing the odor-controlling substance.

[0012] The odor-controlling substance is applied to a large-area carrier, designed as a sheet-like structure with a large surface area. Applying the active ingredient to this large carrier offers the advantage that the often liquid-only active ingredient can be dried before being placed in the pouch. The large surface area of ​​the carrier facilitates easy drying of the odor-controlling substance. By appropriately selecting a large-area sheet-like carrier, a particularly large active surface area loaded with the active ingredient can be achieved, resulting in a correspondingly high odor-reducing effect. Due to the large active surface area, the odor-reducing effect can be achieved with relatively small amounts of the active ingredient, thus saving costs.Furthermore, the design of the carrier as a flat structure with a large surface area simplifies the insertion or incorporation of the carrier into the bag.

[0013] The bag can be, in particular, a garbage bag or a laundry bag. The invention is generally suitable for bags for containing media that emit odors which should not escape.

[0014] According to one embodiment of the invention, the odor-controlling substance is a chemically reducing or neutralizing odorant and / or an odorant adsorbing (binding) substance. The odor-controlling substance can be a chemically reducing or neutralizing odorant (e.g., ODOGard, commercialized by Rem Brands Inc.) and / or an odorant binding substance (e.g., AQFRESCH, commercialized by Aq Dot Ltd., or "Febreze," commercialized, for example, by P&G). According to another embodiment, the odor-controlling substance comprises, in addition to an odor-reducing or neutralizing agent and / or adsorbing agent, further odor-controlling substances, e.g., odor-masking fragrances or substances with other effects.

[0015] According to another formulation, the odor-controlling substance comprises one or more of the following (active) substances, or consists of one or more of the following (active) substances: cucurbiturils, cyclodextrins, halo-active aromatic sulfonamide compounds. The aforementioned AQFRESCH is based on cucurbiturils, Febreze is based on cyclodextrins, and ODOGard is based on halo-active aromatic sulfonamide compounds.

[0016] According to another embodiment, the odor-controlling substance is arranged on the surface of the carrier in a dry state. This prevents bacterial growth in the bag.

[0017] In another embodiment, the odor-controlling substance is applied in liquid form to the surface of the substrate in a volatile solvent and then dried. This allows the odor-controlling substance to be spread thinly and evenly across the substrate's surface and subsequently dried. This method allows for the application of the odor-controlling substance to the substrate in a particularly effective manner, while conserving material. Furthermore, this method facilitates simple drying with relatively low energy consumption.

[0018] In another embodiment, the substrate is sprayed with an odor-controlling substance in a volatile solvent in liquid form and then dried. This allows the odor-controlling substance to be distributed particularly thinly and evenly on the surface of the substrate.

[0019] A sheet-like structure is defined as an essentially two-dimensional structure that extends primarily in one plane and has only a relatively small extent perpendicular to that plane. A sheet-like structure has a large surface area if the surface area on at least one of its two large sides is greater than the base area of ​​the sheet-like structure, preferably being a multiple of the base area. According to another embodiment, the sheet-like structure with a large surface area is a nonwoven fabric, another textile sheet-like structure, or a film with a structured surface. This allows for a particularly cost-effective production of a sheet-like structure with a large surface area. Furthermore, the aforementioned materials are advantageous for incorporating the carrier material into the bag.

[0020] According to another embodiment, the carrier comprises or is formed from a thermoplastic material, and / or the film comprises or is formed from a thermoplastic material. A carrier made of a thermoplastic material can be easily combined with a film made of a thermoplastic material, particularly if the carrier and film are formed from the same or similar thermoplastic materials, for example, from the same or different polyolefins.

[0021] According to another embodiment, the textile fabric comprises or is formed from thermoplastic fibers or multi-component fibers with at least one thermoplastic component. A nonwoven fabric or other textile fabric made from the aforementioned fibers can be easily bonded to a film made of a thermoplastic material by plasticizing the thermoplastic and pressing it onto the film. Furthermore, the textile fabric made from the aforementioned fibers can be easily solidified by melting the thermoplastic, which is advantageous for production and application.

[0022] According to another embodiment, the nonwoven fabric is a spunbond nonwoven, in particular a spunbond nonwoven made of polypropylene fibers, or a carded nonwoven, in particular a carded nonwoven made of mixed fibers of viscose and polypropylene.

[0023] The end at the bottom edge of the bag body is designed, for example, as a bottom fold or as a lower weld seam (bottom seam) through which the two side walls are connected.

[0024] In another design, the carrier is welded into the side seams of the bag body and / or welded and / or glued to the inside of the bag body between the side edges. This holds the carrier in a fixed position within the bag body, which is beneficial for odor reduction. Welding the carrier into the side seams of the bag body simplifies manufacturing. Welding and / or gluing (e.g., with hot glue) the carrier to the inside of the bag body between the side edges prevents it from interfering with filling by blocking the opening.

[0025] In another embodiment, the support is welded and / or glued to the inside of the bag body in the middle between the two side edges. Preferably, it is welded into the side walls at the ends. Alternatively, the support is welded and / or glued exclusively to the inside of the bag body.

[0026] In another embodiment, the carrier is welded and / or glued to the inside of the bag body at point-like connection points. This is advantageous for simple and material-saving manufacturing.

[0027] According to another embodiment, the carrier containing the odor-controlling substance is arranged in the upper third of the bag body.

[0028] In a preferred embodiment, the strip-shaped carrier is aligned parallel to the upper edge of the bag body. This is advantageous for manufacturing and increases the likelihood that the odor molecules come into contact with the carrier.

[0029] According to another embodiment, the bag body has at least one hem at the upper edge in which a drawstring is arranged, accessible from the outside through at least one handle recess. This allows the bag to be closed at the top to prevent any residual odors from escaping. According to yet another embodiment, the support is arranged below a hem, which is advantageous for manufacturing. Preferably, the support is located a short distance below the hem.

[0030] According to another embodiment, the strip-shaped support has a basis weight of approximately 10 to 50 g / m², preferably 15 to 25 g / m², and more preferably 20 g / m². According to another embodiment, the strip-shaped support has a width of 20 to 100 mm, preferably 40 to 80 mm, and more preferably 60 mm.

[0031] The invention is explained in more detail below with reference to the accompanying drawing of an exemplary embodiment. The drawing shows: Fig. 1 shows a bag with a strip-shaped non-woven fabric containing an odor-reducing agent spread flat on its surface, in a top view; Fig. 2 shows the same bag in a section along line AA. Fig. 1 . According to Fig. 1 and 2 The bag 1 has a bag body 2 with two overlapping side walls 3, 4, each with a folded hem 5, 6 at its upper edge. The side walls 3, 4 are laterally connected to each other by lateral welds 7, 8, which are directed transversely to the hems 5, 6. Furthermore, the bag body 2 has a bottom fold 9 connecting the side walls 3, 4, which is arranged parallel to the hems 5, 6 at the lower edge of the bag body 2. The hems 5, 6 are connected to the side walls 3, 4 by hem seams 10, 11, which run parallel to the bottom fold 9.

[0032] In each of the seams 5, 6, a tension band 12, 13 is arranged. The tension band 12, 13 can be elastic or inelastic. The ends of the tension bands 12, 13 are welded into the lateral welds 7, 8.

[0033] Both hems 5, 6 have handle recesses 14, 15 through which the drawstrings 12, 13 are accessible from the outside.

[0034] Between the seams 5, 6, the bag body 2 has an opening 16 at the upper edge.

[0035] The bottom fold 9 forms a termination 17 at the lower edge of the bag body 2.

[0036] In the upper half of the bag body 2, slightly below the seams 5, 6, a strip-shaped support 18 in the form of a sheet structure 19 is arranged, which is designed as a nonwoven fabric 20. The nonwoven fabric 20 is a spunbond nonwoven. The nonwoven fabric 20 has a surface area 21 on each of its two large sides, which is considerably larger than its base area. An odor-controlling substance 22 is arranged on the surface of the nonwoven fabric 19, which comprises an active ingredient 23 that reduces odors through chemical reaction.

[0037] The bag body 2 and the nonwoven fabric 20 each consist partially or entirely of thermoplastic material. The nonwoven fabric 20 is welded into the side seams 7, 8 of the bag body 2. Between these seams, it is bonded to the inside of one of the two side walls 7, 8 at several point connections 24 using adhesive (preferably hot melt adhesive) and / or by welding. In this example, the nonwoven fabric 20 is bonded to the inside of the side wall 7, 8 at two to three point connections 24.

[0038] The bag body 2 can be manufactured largely conventionally. During manufacturing, a strip-shaped carrier 18 of a thermoplastic nonwoven fabric 20 is fed into the converting machine in such a way that the nonwoven fabric 20 lies between the two side walls 3, 4 of the film web in the upper area of ​​the bag 1 perpendicular to the lateral weld seams 7, 8 and is welded into them.

[0039] The nonwoven fabric 20 can be a thermoplastic nonwoven (e.g., a spunbond nonwoven) with a basis weight of approximately 20 g / m². The strip-shaped carrier 18 is, for example, 60 mm wide and extends over the entire width of the respective bag body 2. The nonwoven fabric 20 is coated with approximately 40 mg of ODOGard before being fed into the converting machine. Since ODOGard is a solid, it is sprayed onto the nonwoven fabric 20 in a suitable aqueous solution. To obtain a tight weld seam in the area where the strip-shaped nonwoven fabric 20 is inserted, it is advantageous to use a nonwoven fabric 20 made of a material that has a similar melting point to the material of the bag 1. For a PE bag, a PP nonwoven or a nonwoven made of bicomponent fibers (e.g., PP core with PE sheath) is advantageous.

[0040] To prevent the strip-shaped nonwoven fabric 20 from running across the bag 1 and obstructing the filling of the waste, the strip-shaped nonwoven fabric is attached to the inside of a side wall of the bag 1 at point-like adhesive joints 24. As a result, it does not run across the opening 16 of the bag 1 when the bag is placed in a waste container. Reference symbol list

[0041] 1 Bag 2 Bag body 3, 4 Side walls 5, 6 Hem 7, 8 Side welds 9 Bottom fold 10, 11 Hem seams 12, 13 Drawstring 14, 15 Handle recesses 16 Opening 17 End 18 Carrier 19 Sheet structure 20 Nonwoven fabric 21 Surface 22 Odor-controlling substance 23 Active ingredient 24 Point-like connection

Claims

1. Bag, in particular garbage bag, comprising a bag body (2) made of a plastic and / or paper film and a carrier (18) in the form of a planar structure (19) with a large surface area (21) with an odor-controlling substance (22) on the surface (21), wherein the bag body (2) comprises two side walls (3, 4) which define an opening (16) at their upper edge, are connected to each other at their lateral edges by lateral welds (7, 8) and at their lower edge by a bottom or other closure (17), and the carrier (18) is arranged in and attached to the bag body. characterized by the fact that the carrier (18) is arranged in a strip shape and in the upper half of the bag body (2).

2. Bag according to claim 1, wherein the odor-controlling substance (22) is an odor-reducing or neutralizing substance by chemical reaction and / or an odor-adsorbing substance.

3. Bag according to one of claims 1 to 2, wherein the odor-controlling substance (22) comprises one or more of the following (active) substances (23): cucurbiturils, cyclodextrins, haloactive aromatic sulfonamide compounds.

4. Bag according to claim 1 or 2, wherein the odor-controlling substance is arranged in the dry state on the surface (21) of the carrier (18).

5. Bag according to one of claims 1 to 4, wherein the odor-controlling substance (22) is applied to the surface of the carrier (18) in a volatile solvent and dried.

6. Bag according to claim 5, wherein the carrier (18) is sprayed with an odor-controlling substance (22) in a volatile solvent and dried.

7. Bag according to any one of claims 1 to 6, wherein the large surface area (21) of the planar structure (19) is a nonwoven fabric or another textile planar structure (19) or a film with a structured surface.

8. Bag according to any one of claims 1 to 7, wherein the planar structure (19) comprises or is formed from a thermoplastic material, the thermoplastic material preferably being a polyolefin.

9. Bag according to claims 7 and 8, wherein the textile fabric (19) comprises or is formed from thermoplastic fibers or multi-component fibers with at least one thermoplastic component, wherein preferably the thermoplastic fibers are polypropylene fibers or the multi-component fibers are bi-component fibers having a polypropylene core or a polyester core and a polyethylene sheath.

10. Bag according to one of claims 7 to 9, wherein the nonwoven fabric (20) is a spunbond nonwoven, in particular a spunbond nonwoven made of polypropylene fibers, or a carded nonwoven, in particular a carded nonwoven made of polypropylene or of mixed fibers of viscose and polypropylene.

11. Bag according to one of claims 1 to 10, comprising at least one of the following features: • the strip-shaped support (18) is welded into the lateral weld seams (7, 8) of the bag body (2) at its two lateral edges, • the strip-shaped support is welded and / or glued to the inside of the bag body (2) between the lateral weld seams (7, 8), • the strip-shaped support (18) is welded and / or glued to the inside of the bag body (2) in the middle between the two lateral weld seams (7, 8).

12. Bag according to one of claims 1 to 11, wherein the strip-shaped carrier (18) is welded and / or glued to the inside of the bag body (2) at point-shaped connection points (24).

13. Bag according to one of claims 1 to 12, wherein the strip-shaped support (18) is arranged completely in the upper half of the bag body (2), preferably the strip-shaped support (18) being arranged in the upper third of the bag body (2).

14. Bag according to any one of claims 1 to 13, wherein the strip-shaped support (18) is oriented substantially parallel to the upper edge of the bag body (2).

15. Bag according to one of claims 1 to 14, which has at least one hem (5, 6) at the upper edge of the side walls (3, 4) in which a drawstring (12, 13) is arranged, which is accessible from the outside through at least one grip recess (14, 15), wherein preferably the strip-shaped support (18) is arranged below the hem (5, 6).

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