WO2013044933A1 - Contenant repulpable - Google Patents

Contenant repulpable Download PDF

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Publication number
WO2013044933A1
WO2013044933A1 PCT/EP2011/004822 EP2011004822W WO2013044933A1 WO 2013044933 A1 WO2013044933 A1 WO 2013044933A1 EP 2011004822 W EP2011004822 W EP 2011004822W WO 2013044933 A1 WO2013044933 A1 WO 2013044933A1
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WO
WIPO (PCT)
Prior art keywords
layer
container
repulpable
tie layer
laminate
Prior art date
Application number
PCT/EP2011/004822
Other languages
English (en)
Inventor
Aad Hoekstra
Risto Vapola
Original Assignee
Huhtamäki Oyj
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huhtamäki Oyj filed Critical Huhtamäki Oyj
Priority to PCT/EP2011/004822 priority Critical patent/WO2013044933A1/fr
Publication of WO2013044933A1 publication Critical patent/WO2013044933A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/28—Other details of walls

Definitions

  • the invention relates to a preferably repulpable container based essentially on cellulosic material comprising a sidewall enclosure having a top and bottom portion with an opening at said top portion and a bottom closure attached to said bottom portion, at least the inner side wall of said side wall enclosure being formed from a preferably repulpable and recyclable laminate based essentially on cellulosic material comprising a paper based layer as layer a), a tie layer b) based on an at least repulpable and preferably water soluble adhesive covering one surface of layer a) with the exception of one of the edge portions of layer b) at a side seam region, which edge portion is based at least partially on a moisture barrier adhesive, and as layer c) adjacent to layer b) a moisture resistant liner paper impregnated with a hydrophobing, at least repulpable agent, wherein the overlapping opposite edge portions of said laminate being joined together at said side seam region in such way that the laminate's edge portion comprising the part of the tie layer b)
  • So called fast food restaurants are a major and growing supplier of nutrition.
  • the logical concept of fast food restaurants is based on the single use of packages and containers.
  • Single use means that after the consumption of the food or beverage, the package or container is discarded and not re-used.
  • Such containers are e.g. disclosed in WO 2010/109000 A2 and WO 2011/088966 A1.
  • such containers comprise a bottom part and a sidewall and further a lid opening and are conventionally prepared by first producing the sidewall and consequent insertion of a bottom part to form the container.
  • the sidewall of such containers is preferably formed from a laminate having two opposite edge regions which are joined together by a side seam to form the sidewall.
  • the laminate usually comprises an impregnated liner directed to the inside of the container which is tied to an outer layer directed to the outside of the container.
  • WO 2010/109000 A2 and WO 2011/088966 A1 attempt to solve this problem by preparing a repulpable container from a laminate comprising an impregnated paper liner tied to an outer layer, wherein said paper liner exceeds the rest of the laminate at one of the edge portions and thus may be folded over the opposite edge portion when these edge portions are joined together to form the sidewall. Since the liner is impregnated, the folded over excess width of said liner protects the edge portions of the laminate at the area where they are joined together from wicking in of moisture.
  • a demand for lowering the costs of the production of these containers always exists, i.e. a need for providing a more cost and time efficient process for the manufacture of such containers.
  • any saving of manufacturing steps like the folding over step which is necessary for providing an improved construction of the moisture stable containers according to WO 2010/109000 A2 and WO 2011/088966 A1 i.e. any increase in the efficiency and reduction of costs, is desirable, however, without impairing the quality of these containers, in particular with regard to their moisture stability.
  • a preferably repulpable container preferably a cup, based essentially on cellulosic material, preferably for water containing foodstuff, comprising a sidewall enclosure having optionally a double side wall construction and a top and bottom portion with an opening at said top portion and a bottom closure attached to said bottom portion, at least the inner side wall of said side wall enclosure being formed from a preferably repulpable and recyclable laminate based essentially on cellulosic material comprising a) a paper based layer as an optionally outer layer of the container, b) a tie layer based on an at least repulpable and preferably water soluble adhesive covering one surface of layer a) with the exception of one of the edge portions of layer b) at a side seam region, which edge portion is based at least partially on a moisture barrier adhesive, c) adjacent to layer b) a moisture resistant liner paper impregnated with a hydrophobing, at least repulpable agent, wherein the overlapping opposite edge portions
  • the expression “essentially” in the term “based essentially on cellulosic material” with respect to all parts of the inventive container means that the container is based on at least 80%, preferably at least 90%, by weight, of cellulosic material, based on the total weight of the container.
  • the expression “repulpable and recyclable” means that the contents of cellulosic material are completely repulpable and recyclable, according to standard paper mill processes with standard process carried out with conditions.
  • the non-cellulosic material of the inventive container which is preferably at least repulpable according to the before described definition such as the moisture barrier adhesive part of tie layer b) and the hydrophobing agent employed for impregnating liner c) and optionally also layer a) is at least water-dispersable.
  • the non- cellulosic material derived from impregnation of liner c) with the hydrophobing agent may also be water-soluble by time depending on the nature of the hydrophobing agent employed. Therefore, preferably the non-cellulosic material of the inventive container can not only be repulped, but preferably also at least partially be recycled into standard paper manufacturing processes or be degraded biologically.
  • biodegradable refers to a biological degradation according to DIN EN 13432.
  • the cellulosic material of the inventive container is paper or paper board. This preferably guarantees the required mechanical properties of an inventive container.
  • the inventive container is preferably a single-use container.
  • the inventive container is a container with a single side wall construction, i.e. a single-side-walled container.
  • said single-side-walled container is a cup, more preferably a single-use cup.
  • the inventive container is a container with a double side wall construction, i.e. a double-side-walled container.
  • said double-side-walled container is a cup, more preferably a single-use cup.
  • An inventive double-side-walled container preferably comprises a single-side-walled container according to the present invention as described herein thereafter, in particular with an inner side wall as described herein thereafter, which additionally comprises an outside sidewall, preferably for insulation and/or stacking reasons.
  • said outside side wall is connected to the single-side-walled container at least at the top and bottom portions of the sidewall enclosure.
  • Double-side-walled containers are e.g. known from EP 1 227 043 B1 and US 2006/0144915 A1.
  • the outside side wall serves as an outside shell or wrapper which is apt to coat the inner side wall and is preferably kept spaced therefrom.
  • water containing foodstuff in the sense of the present invention can be any liquid like a water-containing beverage or soup, more preferably any hot or cold liquid such as coffee, tea or ice-tea.
  • At least the inner side wall of the side wall enclosure of the inventive container is formed from a repulpable and recyclable laminate based essentially on cellulosic material, such as paper or paper board, which comprises layers a) and b) and liner c).
  • At least the inner side wall of the side wall enclosure of the inventive container is essentially based on paper or paper board. This guarantees preferably the required mechanical properties of an inventive container.
  • layer (a) of the laminate forming the side wall enclosure of the inventive container is preferably based on paper or paper board.
  • layer a) of the inventively used laminate has a weight of 100 to 350 g/m 2 . In another preferred embodiment layer a) has a weight of at least ⁇ 150 g/m 2 .
  • Layer (a) of the inventively used laminate may be optionally coated or sized on at least its outer surface, wherein said coating or size can be based on clay, polyvinylalcohol (PVOH) and/or starch.
  • Said coating or sizing is preferably at least water soluble or water dispersable and therefore repulpable. Such a coating or sizing allows an even surface, especially for printing.
  • Layer (a) of the inventively used laminate can optionally contain recycled fibres.
  • layer a) of the inventively used laminate has a weight of 100 to 350 g/m 2 and is a paper board which optionally has a coating or sizing at least on its outer surface, which is optionally based on a clay coating or sizing, a polyvinylalcohol (PVOH) coating or sizing and/or a starch coating or sizing.
  • PVOH polyvinylalcohol
  • layer a) is a paper layer having a weight of at least > 150 g/m 2 and optionally contains recycled fibres.
  • layer a) is directed to the outside of the inventive container either facing the inside surface of the outside side wall of the side wall enclosure of a double-side- walled container or being the outmost layer of the side wall enclosure of a single- side-walled container.
  • the inventively used laminate further comprises a tie layer b) based on an at least repulpable and preferably water soluble adhesive covering one of the surfaces of layer a) with the exception of one of the edge portions at a side seam region.
  • the repulpable, preferably water soluble, adhesive part of the tie layer b) of the inventively used laminate is preferably the major part of the tie layer b).
  • said repulpable, major part of the tie layer b) of the inventive container is water soluble, even more preferably biodegradable.
  • said repulpable, water soluble, major part of the tie layer b) is preferably based on at least one preferably heat activatable, repulpable and preferably water soluble adhesive selected from the group comprising ethylene/vinylalcohol copolymers (EVOH), polyvinylalcohols (PVOH), polyvinylacetates (PVA) and ethylene/ vinylacetate copolymers (EVA).
  • EVOH ethylene/vinylalcohol copolymers
  • PVH polyvinylalcohols
  • PVA polyvinylacetates
  • EVA ethylene/ vinylacetate copolymers
  • the repulpable, preferably water soluble, major part of the tie layer b) can also be based on at least one repulpable and preferably water soluble, cold adhesive selected from the group comprising starch based adhesives, starch pastes, polylactic acid based adhesives and polyvinylacetates.
  • Ethylene/vinylalcohol copolymers preferably used for the production of the repulpable and preferably water soluble, major part of the tie layer b) can be obtained via complete hydrolysis of ethylene/ vinylacetate copolymers (EVA).
  • EVA ethylene/ vinylacetate copolymers
  • Particularly preferred are preferably water soluble fully hydrolyzed ethylene/ vinylacetate copolymers (EVA) having a degree of hydrolysis of > 98%, and a content of ethylene in the range of from 0.01-20 mol-%, preferably in the range of from 0.01-10 mol-%.
  • Ethylene/vinylacetate copolymers preferably used for the production of the repulpable, preferably water soluble, major part of the tie layer b) can be obtained via polymerization of ethylene and vinyl acetate followed by partial, i.e. incomplete hydrolysis.
  • Particularly preferred are preferably water soluble partially hydrolyzed ethylene/ vinylacetate copolymers having a degree of hydrolysis of ⁇ 50% to 98%, preferably of > 60% to 98%, more preferably of preferably of ⁇ 70% to 98%, even preferably of ⁇ 75% to 98%, and a content of ethylene in the range of from 0.01-20 mol-%, preferably in the range of from 0.01-10 mol-%.
  • Polyvinylalcohols preferably used for the production of the repulpable, preferably water soluble, major part of the tie layer b) can be obtained via complete hydrolysis of polyvinylacetates (PVA). Particularly preferred are fully hydrolyzed, preferably water soluble polyvinylacetates having a degree of hydrolysis of ⁇ 98%.
  • Polyvinylacetates (PVA) preferably used for the production of the repulpable, preferably water soluble, major part of the tie layer b) can be obtained via polymerization of vinyl acetate followed by partial, i.e. incomplete hydrolysis.
  • Particularly preferred are partially hydrolyzed, preferably water soluble polyvinylacetates having a degree of hydrolysis of ⁇ 50% to 98%, preferably of ⁇ 60% to 98%, more preferably of preferably of ⁇ 70% to 98%, even preferably of ⁇ 75% to 98%.
  • the water soluble major part of the tie layer b) of the inventively used laminate can also be based on at least one at least repulpable, preferably biodegradable adhesive having at least a water absorption capacity per g/m 2 over 24 hours allowing a Cobb value of up to 25 g/m 2 (120 sec), preferably a Cobb value of 10 to 15 g/m 2 (120 sec), of layer c).
  • Cobb values can be determined according to DIN EN 20535: 1994.
  • the preferably water soluble major part of tie layer b) is based on an at least repulpable, preferably biodegradable and preferably heat activatable adhesive blended with an at least repulpable, preferably biodegradable, natural, partially natural or synthetic water absorbing compound with gel forming capacity, preferably in order to assure that tie layer b) can absorb a certain amount of water which is required for allowing a Cobb value of up to 25 g/m 2 (120 sec), preferably a Cobb value of 10 to 15 g/m 2 (120 sec), of layer c).
  • said preferably water soluble adhesive is blended with said natural, partially natural or synthetic water absorbing compound with gel forming capacity in an amount sufficient to achieve the required water absorption capacity per g/m 2 over 24 hours for allowing said Cobb value of up to 25 g/m 2 of layer c), preferably said Cobb value of 10 to 15 g/m 2 (120 sec).
  • Natural or partially natural water absorbing compounds with gel forming capacity are preferably one or more compounds selected from the group comprising microcrystalline cellulose with 11 wt.
  • Synthetic water absorbing compounds with gel forming capacity are preferably one or more compounds selected from the group comprising synthetic alginates, super- absorbent resins, preferably super-absorbent cross-linked polyacrylates, preferably sodium- or ammonium-neutralized.
  • a particularly preferred natural, partially natural and/or synthetic water absorbing compound with gel forming capacity is alginate, preferable aligante originating from algae, most preferably from brown algae.
  • the natural, partially natural as well as the synthetic compounds with water absorption capacity are preferably provided as powder in order to be blended with the adhesive more easily.
  • the preferably water soluble major part of tie layer b) based on an at least repulpable, preferably biodegradable and preferably heat activatable adhesive blended with an at least repulpable, preferably biodegradable, natural, partially natural or synthetic water absorbing compound with gel forming capacity has a melting point ⁇ 70°C and loses its cohesion after the water absorption capacity as described above has been exceeded.
  • This kind of water buffering property allows the liner paper c) of the laminate of the inventively used laminate to have a certain minimum water permeability before losing its cohesion which is necessary to be repulpable.
  • the tie layer b) of the inventively used laminate is based on an at least repulpable, preferably water soluble, adhesive covering one surface of layer a) with the exception of one the edge portions of layer b) at a side seam region. At said edge portion, the tie layer b) of the inventively used laminate is based at least partially on a moisture barrier adhesive.
  • the preferably water insoluble moisture barrier adhesive part of tie layer b) is based on at least one repulpable and/or biodegradable resin selected from the group comprising aliphatic and aromatic copolyesters, polyacrylates, polymethacrylates, polyacrylic acids, polymethacrylate acids, water insoluble ethylene/ vinylalcohol copolymers, water insoluble ethylene/ vinylacetate copolymers, polylactic acids, polyhydroxyalkanoates, polybutylsuccinates and mixtures of at least two resins.
  • aliphatic and aromatic copolyesters polyacrylates, polymethacrylates, polyacrylic acids, polymethacrylate acids, water insoluble ethylene/ vinylalcohol copolymers, water insoluble ethylene/ vinylacetate copolymers, polylactic acids, polyhydroxyalkanoates, polybutylsuccinates and mixtures of at least two resins.
  • Copolyesters which can used for the production of the preferably water insoluble moisture barrier adhesive part of tie layer b) are preferably copolymers of aliphatic and aromatic including partially aromatic polyesters and further biodegradable polymers such as polylactides, polyhydroxyalkanoates, polybutylsuccinates or polycaprolactones.
  • the inventively used copolyester can be derived from polyols, preferably diols such as ethylene glycol and/or 1 ,4-butandiol, and dicarbonic acids such as adipic acid, terephthalic acid and/or isoterephthalic acid.
  • Preferred are copolymers of (co)polyesters and further biodegradable polymers such as polylactides.
  • copolyesters of butandiol, adipic acid and terephthalic acid and of polylactic acid.
  • Such copolyesters are commercially available, e.g. as BASF products Ecoflex® and Ecovio®.
  • Ethylene/vinylalcohol copolymers (EVOH) used for the production of the moisture barrier adhesive part of tie layer b) are water insoluble ethylene/vinylalcohol copolymers (EVOH) which can be obtained via complete hydrolysis of ethylene/ vinylacetate copolymers (EVA). Particularly preferred are fully hydrolyzed ethylene/ vinylacetate (copolymers EVA) having a degree of hydrolysis of > 98%, and a content of ethylene in an amount that renders the respective ethylene/vinylalcohol (EVOH) copolymers water insoluble.
  • Ethylene/vinylacetate copolymers used for the production of the moisture barrier adhesive part of tie layer b) are water insoluble ethylene/vinylacetate copolymers which can be obtained via polymerization of ethylene and vinyl acetate, optionally partially hydrolyzed.
  • Polylactic acids i.e. polylactides (PLA) can also be used for the production of the preferably water insoluble moisture barrier adhesive part of tie layer b).
  • Preferred are polylactides which are based on DL-lactide, L-lactide and/or D-lactide.
  • the moisture barrier adhesive of the tie layer b) of the inventively used laminate is arranged in form of at least one dotted line and/or at least one string parallely to the vertically aligning edge of the inventively used laminate at the side seam region of the tie layer b).
  • the moisture barrier adhesive part of the tie layer b) of the inventively used laminate is arranged in form of at least one, preferably more than one, even more preferably at least two, still more preferably at least three, dotted line(s), parallely to the vertically aligning edge of the inventively used laminate at the side seam region of the tie layer b).
  • the moisture barrier adhesive part of the tie layer b) of the inventively used laminate is arranged in form of at least one, preferably in form of at least two, more preferably in form of at least three, string(s), parallely to the vertically aligning edge of the inventively used laminate at the side seam region of the tie layer b).
  • the moisture barrier adhesive part of the tie layer b) of the inventively used laminate is arranged as a combination of at least one dotted line and at least one string, which string is adjacent to the preferably water soluble major part of the tie layer b), at the edge portion respectively at the side seam region of tie layer b).
  • some strings based on the moisture barrier adhesive are arranged from the moisture soluble major part of the tie layer b) parallel to the edge of the side seam of the laminate, which strings have a moisture barrier increasing from the moisture soluble part of the tie layer b) to the edge of the laminate at said side seam region.
  • the edge portion which is based at least partially on a moisture barrier adhesive, at the side seam region of tie layer b) is a coherent layer, wherein said coherent layer is accordingly based at least partially, preferably completely, on a preferably water insoluble moisture barrier adhesive.
  • the moisture barrier adhesive part of tie layer b) of the inventively used laminate is arranged in a width of 1 to 15 mm, more preferably in a width of 2 to 10 mm, of the edge portion at said side seam region.
  • the tie layer b) amounts to 1 to 15 g/m 2 , preferably 2 to 10 g/m 2 .
  • the tie layer b) of the inventively used laminate cannot be dissolved or disrupted by any direct contact of the inside part of the side seam with the water-containing foodstuff, wherein the overlapping opposite edge portions of the inventively used laminate are joint together forming the sidewall of the sidewall enclosure, since the laminate's edge portion comprising the part of the tie layer b) which is based at least partially on a preferably water insoluble moisture barrier adhesive forms the inside part of the side seam.
  • the inventively used laminate further comprises - adjacent to tie layer b) - a moisture resistant liner paper c) which is impregnated with a hydrophobing, at least repulpable, preferably biodegradable, agent and is directed towards the inside of the inventive container.
  • the liner paper c) is based on finely-ground wood-fibers.
  • the liner paper consists entirely of materials from renewable sources such as finely- ground wood-fibers.
  • the hydrophobing agent is preferably at least one hydrophobing agent selected from the group comprising hydrogenated triglycerides or blends of natural, partially or fully hydrogenated triglycerides, at least repulpable, preferably biodegradable, cationic, thermosetting resin of polyamidoamine, dialdehyde and epichlorohydrine, and aliphatic and aromatic copolyesters, preferably mixtures of biodegeradable aliphatic- aromatic copolyesters of aliphatic diols, preferably butandiol, adipic acid and terephthalic acid and of polylactic acid.
  • the aliphatic and aromatic copolyesters mentioned before for the production of the moisture barrier adhesive part of tie layer b) can also be employed as hydrophobing agent.
  • the liner paper c) and optionally layer a) are impregnated with a hydrogenated triglyceride selected from the group comprising hydrogenated vegetable oil, preferable soybean oil, peanut oil, olive oil, palm oil, coconut oil and/or cottonseed oil, and an animal fat, preferable a beef tallow, pork lard, poultry grease and/or fish oil, more preferably with a vegetable oil.
  • a hydrogenated triglyceride selected from the group comprising hydrogenated vegetable oil, preferable soybean oil, peanut oil, olive oil, palm oil, coconut oil and/or cottonseed oil, and an animal fat, preferable a beef tallow, pork lard, poultry grease and/or fish oil, more preferably with a vegetable oil.
  • the liner paper c) and optionally layer a) are impregnated with at least one hydrogenated triglyceride having a carbon chain length of 10 to 20.
  • hydrogenated triglycerides allow repulping at normal repulping conditions according to standard repulping processes.
  • the hydrogenated triglyceride hydrophobing impregnation can be easily removed with normal foam tank separation processes because the triglyceride particles formed and dispersed in water during repulping then float on the cool water and are not attracted to the paper fibres. Therefore, the hydrogenated triglyceride particles can be easily separated from the paper fibres, which can be repulped, whereas the triglyceride particles can be biodegraded. Accordingly, the use of hydrogenated triglyceride for impregnating and/or coating paper or paper board allow a repulping rate, equal to those of untreated paper or paperboard or any other kind of untreated cellulosic material.
  • the liner paper c) and optionally layer a) are impregnated with an aliphatic and/or aromatic copolyester, preferably of copolyester derived from butandiol, adipic acid and/or terephthalic acid, and of polylactic acid.
  • said hydrophobing agent can be used in an amount to achieve a Cobb value of up to 25 g/m 2 (120 sec), more preferably a Cobb value of 10 to 15 g/m 2 (120 sec). In a preferred embodiment of the inventive container the liner paper c) amounts to 30 to 45 g/m 2 .
  • the liner paper c) of the inventively used laminate has to cover the entire inside of the inventive container.
  • the liner paper c) protects the adhesive layer b) and especially layer a), preferably made of paper or paper board, from any direct contact with the water-containing foodstuff. Since the inside edge portion of the side seam made by the overlapping opposite edge portions of the inventively used laminate is also protected against wicking in of moisture by the moisture barrier part of the tie layer b), tie layer b) cannot be dissolved by any direct contact with the contained foodstuff especially not with the water of the food stuff. If necessary, the edge of the inside part of the side seam can be covered by a strip of a liner paper c).
  • Fig. 1a shows a cross-section of the inventively used laminate forming at least the inner side wall of the side wall enclosure comprising a layer a) (100), a tie layer b) based on an at least repulpable, preferably biodegradable, more preferably water soluble, adhesive as major part (101 ) of said tie layer b) covering one surface of layer a) with the exception of one of the edge portions at the side seam region (102) of layer b) which is based at least partially on a preferably water insoluble moisture barrier adhesive, and a moisture resistant liner paper c) (103).
  • Said edge portion (102) at the side seam region of layer b) is in the form of a coherent layer.
  • Fig. 1 b as shown is a cross-section of the inventively used laminate according to Fig. 1a.
  • the moisture resistant liner paper c) (103) of the inventively used laminate has been omitted.
  • Fig. 2a shows a cross-section of the inventively used laminate forming at least the inner side wall of the side wall enclosure comprising a layer a) (100) and a tie layer b) based on an at least repulpable preferably water soluble adhesive as major part (101 ) of said tie layer b) covering one surface of layer a) with the exception of one of the edge portions at the side seam region (102) of layer b) which is based at least partially on a preferably water insoluble moisture barrier adhesive.
  • the liner paper c) has been omitted.
  • the moisture barrier adhesive is arranged in form of three strings (104) parallely to the vertically aligning edge of the inventively used laminate at the side seam region of the tie layer b).
  • These three strings can consist of adhesives having a moisture barrier increasing from the moisture soluble part of the tie layer b) (101 ), i.e. the major part of tie layer b), to the edge of the laminate at said side seam region.
  • Fig. 2b shows a cross-section of the inventively used laminate according to Fig. 2a.
  • the moisture barrier adhesive is arranged in form of a combination of three dotted lines (105) and one string (104), which string (104) is adjacent to the major part of the tie layer b) consisting of water soluble adhesives, at the side seam region of tie layer b) parallely to the vertically aligning edge of the inventively used laminate.
  • Fig. 3 shows an inventive container in the form of a cup having an inner side wall
  • the overlapping opposite edge portions of the inventively used laminate (107) are joint together at the side seam (108).
  • the laminate's edge portion comprising the part of the tie layer b) that is based at least partially on a moisture barrier adhesive is the inside part (109) of the side seam.
  • inventively used laminates can be produced according to known manufacturing processes, preferably by laminating and/or coating and/or extrusion.
  • the bonding of layer a) to liner c) can be carried out by activating the preferably activatable, more preferably heat activatable, adhesive of tie layer b) by hot air or ultrasonic application.
  • the inventive container especially the cup, can be e.g. produced according to the following process, which preferably can be carried out continuously.
  • Another aspect of the present invention is a process for the preparation of an inventive container.
  • said method comprises the following steps:
  • step 1 defining specific areas in a first web of paper or paper board as layer a) of the inventively used laminate, the areas having the dimension of side wall parts, preferably having a dimension defining a conical or cylindrical shape of the inventive container, with two lateral edges, by means of a template having said dimension (step 1 ),
  • step 2 coating the major part of each of the defined side wall part with an at least repulpable and preferably water soluble adhesive with the exception of one edge portion at the side seam region for forming the major part of the tie layer b) (step 2),
  • barrier adhesive in an inventively disclosed form, optionally simultaneously with step 2 or optionally before step 2 is carried out (step 3),
  • step 4 covering the first web of paper or paper board having defined areas in the dimension of side wall parts, the major part of said areas being coated with at least repulpable and preferably water soluble adhesive and the remaining edge portion of these areas being coated with a moisture barrier adhesive in an inventively disclosed form, said major part and said edge portion forming the tie layer b) of the inventively used laminate, with a second web of moisture resistant liner paper as liner c) of the inventively used after heat activating the tie layer b) (step 4),
  • step 5 optionally printing the defined areas in the dimension of side wall parts of the obtained laminate, preferably layer a) of these defined areas of the obtained laminate, (step 5),
  • step 6 optionally arranging glue portions at the edge portions of the defined areas in the dimension of side wall parts of the obtained laminate (step 6),
  • step 8 joining the overlapping opposite edge portions of each cut out side wall part to form the side seam of the sidewall enclosure by means of sealing or glueing the joined regions in such way that the laminate's edge portion comprising the part of the tie layer b) that is based at least partially on a moisture barrier adhesive, becomes the inside part of the side seam (step 8),
  • step 9 inserting the bottom portion into the side wall enclosure from below, e.g. by means of glueing or sealing.
  • Each of the steps of the preferred method described before can be performed and monitored automatically, preferably by means of UV marks.
  • the inventive container especially a cup
  • the bottom portion of the inventive container is formed, preferably punched out, of a web based essentially on cellulosic material comprising a paper based layer a') as an optionally outer layer of the bottom portion, a tie layer b') based on an at least repulpable and preferably water soluble adhesive covering one surface of layer a') and adjacent to layer b') a moisture resistant liner paper c') impregnated with a hydrophobing, at least repulpable agent which is direct inwards the inventive container.
  • the joint laminate preferably has a cylindrical or conical shape, especially when it is used to produce cups.
  • the joint laminate can also be of a different shape such as e.g. a rectangular shape.
  • inventively used laminate can also be used to produce other containers, especially for single use, than cups such as e.g. trays.
  • the inventive container has an opening at its top portion. Therefore, the inventive container can be equipped with an optionally removable lid.
  • the inventively used laminate can also be used to produce containers such as packages for ice-cream, plates or folding cartons for frozen foodstuff. All these kinds of containers are especially suitable for single use.
  • Another aspect of the present invention is a process for the preparation of an inventive double-side-walled container, which preferably comprises a single-side- walled container according to the present invention as described before, in particular with an inner side wall as described before, which, however, additionally comprises an outside side sidewall, preferably for insulation and/or stacking reasons, and preferably connected to the single-side-walled container at least at the top and bottom portions of the sidewall enclosure.
  • a single-side-walled container can be positioned on a forming mandrel for support with the overlapping edge portions of an outside shell being sealed or glued together at least at the bottom and top region to said single-side-walled container for forming an inventive double-side-walled container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)

Abstract

L'invention concerne un contenant de préférence repulpable essentiellement composé de matière cellulosique comprenant une enceinte de paroi latérale comprenant une partie de sommet et de fond présentant une ouverture au niveau de ladite partie de sommet et une enceinte de fond fixée sur ladite partie de fond, au moins la paroi latérale interne de ladite enceinte de paroi latérale étant formée d'un stratifié de préférence repulpable et recyclable essentiellement composé de matière cellulosique comprenant une couche à base de papier en guise de couche a), une couche de liaison b) composée d'un adhésif au moins repulpable et de préférence soluble dans l'eau recouvrant une surface de la couche a) à l'exception de l'une des parties de bord de la couche b) au niveau d'une région de joint latérale, ladite partie de bord étant composée au moins partiellement d'un adhésif formant une barrière contre l'humidité, et, en guise de couche c) adjacente à la couche b), un papier doublure résistant à l'humidité imprégné d'un agent hydrophobe au moins repulpable, les parties de bord opposées se chevauchant dudit stratifié étant raccordées au niveau de ladite région de joint latérale de sorte que la partie de bord du stratifié comprenant la partie de la couche de liaison b) composée au moins partiellement d'un adhésif formant une barrière contre l'humidité constituant la partie intérieure du joint latéral.
PCT/EP2011/004822 2011-09-27 2011-09-27 Contenant repulpable WO2013044933A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/004822 WO2013044933A1 (fr) 2011-09-27 2011-09-27 Contenant repulpable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/004822 WO2013044933A1 (fr) 2011-09-27 2011-09-27 Contenant repulpable

Publications (1)

Publication Number Publication Date
WO2013044933A1 true WO2013044933A1 (fr) 2013-04-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/004822 WO2013044933A1 (fr) 2011-09-27 2011-09-27 Contenant repulpable

Country Status (1)

Country Link
WO (1) WO2013044933A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015162366A1 (fr) 2014-04-23 2015-10-29 Fondation Mediterranee Infection Procédé de production de méthane par co-culture aérobie de microorganismes anaérobies
EP3789538A1 (fr) * 2019-09-03 2021-03-10 Constantia Pirk GmbH & Co. KG Papier stratifié pouvant être remis en suspension et son procédé de fabrication
US20210284396A1 (en) * 2020-03-12 2021-09-16 Illinois Tool Works Inc. Repulpable Zipper for Zip Packaging
US11454439B2 (en) 2017-01-16 2022-09-27 Domtar Paper Company, Llc Disposable ice pack

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157338A (en) * 1962-05-29 1964-11-17 American Can Co Container and method of making the same
US3202566A (en) * 1962-09-04 1965-08-24 Olin Mathieson Tube blank
FR2371350A1 (fr) * 1976-11-18 1978-06-16 Onoda Cement Co Ltd Gobelets et recipients en papier
WO1998045111A1 (fr) * 1997-04-04 1998-10-15 Tetra Laval Holdings & Finance S.A. Lamine d'emballage comportant une couche barriere de gaz sensible a l'humidite, procede de production de ce lamine d'emballage et contenants d'emballage
EP1227043B1 (fr) 2001-01-30 2004-06-02 SEDA S.p.A. Recipient à double paroi
US20060144915A1 (en) 2004-04-22 2006-07-06 Insulair, Inc. Insulating cup wrapper and insulated container formed with wrapper
WO2010109000A2 (fr) 2009-03-25 2010-09-30 HUHTAMÄKI, Oyj Emballage, procédé de fabrication d'un emballage et dispositif pour la fabrication de l'emballage
WO2011088966A1 (fr) 2010-01-23 2011-07-28 Huhtamäki Oyj Stratifié intelligent et récipient intelligent formé à partir de celui-ci

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3157338A (en) * 1962-05-29 1964-11-17 American Can Co Container and method of making the same
US3202566A (en) * 1962-09-04 1965-08-24 Olin Mathieson Tube blank
FR2371350A1 (fr) * 1976-11-18 1978-06-16 Onoda Cement Co Ltd Gobelets et recipients en papier
WO1998045111A1 (fr) * 1997-04-04 1998-10-15 Tetra Laval Holdings & Finance S.A. Lamine d'emballage comportant une couche barriere de gaz sensible a l'humidite, procede de production de ce lamine d'emballage et contenants d'emballage
EP1227043B1 (fr) 2001-01-30 2004-06-02 SEDA S.p.A. Recipient à double paroi
US20060144915A1 (en) 2004-04-22 2006-07-06 Insulair, Inc. Insulating cup wrapper and insulated container formed with wrapper
WO2010109000A2 (fr) 2009-03-25 2010-09-30 HUHTAMÄKI, Oyj Emballage, procédé de fabrication d'un emballage et dispositif pour la fabrication de l'emballage
WO2011088966A1 (fr) 2010-01-23 2011-07-28 Huhtamäki Oyj Stratifié intelligent et récipient intelligent formé à partir de celui-ci

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015162366A1 (fr) 2014-04-23 2015-10-29 Fondation Mediterranee Infection Procédé de production de méthane par co-culture aérobie de microorganismes anaérobies
US11454439B2 (en) 2017-01-16 2022-09-27 Domtar Paper Company, Llc Disposable ice pack
EP3789538A1 (fr) * 2019-09-03 2021-03-10 Constantia Pirk GmbH & Co. KG Papier stratifié pouvant être remis en suspension et son procédé de fabrication
US20210284396A1 (en) * 2020-03-12 2021-09-16 Illinois Tool Works Inc. Repulpable Zipper for Zip Packaging
US11905070B2 (en) * 2020-03-12 2024-02-20 Illinois Tool Works Inc. Repulpable zipper for zip packaging

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