IT201800010453A1 - Food foil and wrapper, as well as processes for making this foil or wrapper - Google Patents
Food foil and wrapper, as well as processes for making this foil or wrapper Download PDFInfo
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- IT201800010453A1 IT201800010453A1 IT102018000010453A IT201800010453A IT201800010453A1 IT 201800010453 A1 IT201800010453 A1 IT 201800010453A1 IT 102018000010453 A IT102018000010453 A IT 102018000010453A IT 201800010453 A IT201800010453 A IT 201800010453A IT 201800010453 A1 IT201800010453 A1 IT 201800010453A1
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- Prior art keywords
- layer
- filter paper
- sheet
- polymeric
- layers
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 9
- 235000013305 food Nutrition 0.000 title description 7
- 239000011888 foil Substances 0.000 title description 4
- 239000010410 layer Substances 0.000 claims description 44
- 239000013047 polymeric layer Substances 0.000 claims description 39
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 239000012790 adhesive layer Substances 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 7
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920002678 cellulose Polymers 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002657 fibrous material Substances 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims description 2
- 239000000123 paper Substances 0.000 description 32
- 235000008429 bread Nutrition 0.000 description 7
- 238000010411 cooking Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011088 parchment paper Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000002964 rayon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 108010068370 Glutens Proteins 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 241001416177 Vicugna pacos Species 0.000 description 1
- 239000013566 allergen Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 235000021312 gluten Nutrition 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
- B65D81/263—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for ventilating the contents
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2069—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere
- B65D81/2084—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere in a flexible container
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
-
- 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
- B65D2205/00—Venting means
- B65D2205/02—Venting holes
-
- 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
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
- B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
- B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Description
Foglio ed involucro per alimenti, nonché procedimenti per fabbricare questo foglio od involucro Food foil and wrapper, as well as processes for making this foil or wrapper
CAMPO TECNICO TECHNICAL FIELD
La presente descrizione riguarda un foglio, in particolare un foglio che può essere impiegato per fabbricare involucri per il confezionamento e la cottura di alimenti, come per esempio il pane senza glutine, che richiede particolari attenzioni durante la sua produzione. La presente descrizione riguarda anche un involucro comprendente tale foglio, nonché procedimenti per fabbricare tale foglio o questo involucro. The present description relates to a sheet, in particular a sheet that can be used to manufacture wrappers for the packaging and cooking of foods, such as gluten-free bread, which requires particular attention during its production. The present disclosure also relates to an envelope comprising such a sheet, as well as methods for manufacturing such a sheet or this envelope.
INQUADRAMENTO DELLA DESCRIZIONE FRAMEWORK OF THE DESCRIPTION
Durante la cottura di alimenti privi di allergeni, quali per esempio il pane senza glutine per consumatori celiaci, l’alimento non deve entrare in contatto con l’ambiente del forno, nel caso in cui il forno, od un qualsiasi altro macchinario presente nella catena produttiva, venga usato, come accade nella maggior parte dei casi, anche per la preparazione di prodotti contenenti l’allergene in questione. When cooking allergen-free foods, such as gluten-free bread for celiac consumers, the food must not come into contact with the oven environment, in the event that the oven, or any other machinery present in the chain productive, is used, as happens in most cases, also for the preparation of products containing the allergen in question.
Di fronte a questa necessità, nel caso della cottura del pane senza glutine, la procedura standard prevede l’utilizzo di involucri perfettamente sigillati, che tuttavia, se messi in forno, non permettono lo scambio di calore e l’uscita di vapore dallo spazio interno. Di conseguenza, il prodotto risulta particolarmente umido durante la cottura in quanto riassorbe l’acqua intrappolata nell’involucro, deteriorando le proprietà organolettiche del prodotto finale, che così risulta spesso molle e poco appetitoso. Il problema potrebbe essere risolto effettuando microforature nell’involucro oppure tramite punzonatura di fori oppure incisioni, tuttavia la presenza di un passaggio diretto porta al rischio di contatto fra interno ed esterno dell’involucro, con ingresso di polveri di prodotti contenenti glutine. Inoltre, in questo caso non si avrebbe comunque un ottimale rilascio di vapore, che richiede invece la creazione di aperture di dimensioni maggiori. Faced with this need, in the case of baking gluten-free bread, the standard procedure involves the use of perfectly sealed casings, which however, if placed in the oven, do not allow the exchange of heat and the escape of steam from the internal space. . Consequently, the product is particularly moist during cooking as it reabsorbs the water trapped in the casing, deteriorating the organoleptic properties of the final product, which thus often turns out to be soft and unappetizing. The problem could be solved by making micro-perforations in the casing or by punching holes or incisions, however the presence of a direct passage leads to the risk of contact between the inside and the outside of the casing, with the entry of powders from gluten-containing products. Furthermore, in this case there would still be an optimal release of steam, which instead requires the creation of larger openings.
SOMMARIO DELLA DESCRIZIONE SUMMARY OF DESCRIPTION
Scopo della presente descrizione è pertanto quello di fornire un involucro esente da tali inconvenienti. Detto scopo viene conseguito con un foglio, un involucro e procedimenti per la loro fabbricazione, le cui caratteristiche principali sono specificate nelle rivendicazioni allegate. The purpose of the present description is therefore to provide a casing free from such drawbacks. Said object is achieved with a sheet, a wrapper and processes for their manufacture, the main characteristics of which are specified in the attached claims.
In particolare, detto scopo viene raggiunto attraverso un involucro formato da un foglio multistrato comprendente almeno uno strato polimerico avente una o più aperture ricoperte con una carta filtro. Questa carta filtro consente lo scambio di calore, umidità e aria fra l’interno e l’esterno dell’involucro ed al contempo previene l’ingresso di particelle che ne potrebbero comportare la contaminazione fisica. A differenza della soluzione attualmente usata, che prevede l’utilizzo di un sacchetto ermetico, il presente involucro consente quindi una cottura ottimale e l’ottenimento di un pane più fragrante. In particular, said object is achieved through an envelope formed by a multilayer sheet comprising at least one polymeric layer having one or more openings covered with a filter paper. This filter paper allows the exchange of heat, humidity and air between the inside and the outside of the envelope and at the same time prevents the entry of particles that could lead to physical contamination. Unlike the solution currently used, which involves the use of an airtight bag, this casing therefore allows for optimal cooking and obtaining a more fragrant bread.
La carta filtro è preferibilmente in cellulosa e/o altre fibre naturali e sia la carta filtro che lo strato polimerico possono resistere alle temperature necessarie alla cottura del pane. The filter paper is preferably made of cellulose and / or other natural fibers and both the filter paper and the polymeric layer can withstand the temperatures necessary for baking bread.
In una forma realizzativa la carta filtro è incollata in bande sopra lo strato polimerico, lasciando così porzioni scoperte di strato polimerico, preferibilmente trasparenti per vedere il contenuto, in modo da permettere una termosaldatura ottimale dell’involucro. In one embodiment, the filter paper is glued in bands over the polymeric layer, thus leaving uncovered portions of the polymeric layer, preferably transparent to see the contents, in order to allow an optimal heat sealing of the envelope.
In un’altra forma realizzativa la carta filtro è disposta tra due strati polimerici al fine di ottenere un involucro con una maggiore resistenza meccanica e con la possibilità di applicare scritte sullo strato polimerico esterno. Anche in questa forma realizzativa gli strati polimerici sono preferibilmente trasparenti per consentire la visione del contenuto attraverso una porzione intermedia. In another embodiment, the filter paper is arranged between two polymeric layers in order to obtain a casing with greater mechanical strength and with the possibility of applying writings on the external polymeric layer. Also in this embodiment, the polymeric layers are preferably transparent to allow viewing of the contents through an intermediate portion.
Grazie alla resistenza alle temperature di un forno, un alimento può essere cotto direttamente nell’involucro. Thanks to the temperature resistance of an oven, a food can be cooked directly in the wrapper.
Il foglio e l’involucro secondo la presente descrizione possono inoltre essere fabbricati con procedimenti relativamente semplici, economici e veloci, preferibilmente con una produzione in serie. The sheet and the wrapper according to the present description can also be manufactured with relatively simple, cheap and fast processes, preferably with a mass production.
BREVE DESCRIZIONE DEI DISEGNI BRIEF DESCRIPTION OF THE DRAWINGS
Ulteriori vantaggi e caratteristiche del foglio, dell’involucro e dei procedimenti secondo la presente descrizione risulteranno evidenti agli esperti del ramo dalla seguente descrizione dettagliata e non limitativa di alcune loro forme realizzative con riferimento agli annessi disegni in cui: Further advantages and characteristics of the sheet, of the wrapper and of the processes according to this description will be evident to those skilled in the art from the following detailed and non-limiting description of some of their embodiments with reference to the attached drawings in which:
- la figura 1 mostra una vista dall’alto di una prima forma realizzativa del foglio; - la figura 2 mostra una vista dal basso del foglio di figura 1; - Figure 1 shows a top view of a first embodiment of the sheet; Figure 2 shows a bottom view of the sheet of Figure 1;
- la figura 3 mostra la sezione III-III di figura 2; - figure 3 shows the section III-III of figure 2;
- la figura 4 mostra uno schema del procedimento di fabbricazione del foglio di figura 1; Figure 4 shows a diagram of the manufacturing process of the sheet of Figure 1;
- la figura 5 mostra una vista frontale di un involucro comprendente il foglio di figura 1 durante una fase del procedimento di fabbricazione dell’involucro; - figure 5 shows a front view of an envelope comprising the sheet of figure 1 during a phase of the envelope manufacturing process;
- la figura 6 mostra una vista laterale dell’involucro di figura 5 durante una fase successiva del procedimento di fabbricazione dell’involucro; - figure 6 shows a side view of the envelope of figure 5 during a subsequent phase of the envelope manufacturing process;
- la figura 7 mostra una vista in sezione di una seconda forma realizzativa del foglio; - la figura 8 mostra uno schema del procedimento di fabbricazione del foglio di figura 7. Figure 7 shows a sectional view of a second embodiment of the sheet; Figure 8 shows a diagram of the manufacturing process of the sheet of Figure 7.
FORME REALIZZATIVE ESEMPLIFICATIVE EXAMPLE REALIZATION FORMS
Facendo riferimento alle figure da 1 a 3, si vede che il foglio 1 secondo una prima forma realizzativa comprende almeno uno strato polimerico 2 avente due superfici. Uno o più strati di carta filtro 4 sono applicati su una superficie, ad esempio la superficie superiore, dello strato polimerico 2 mediante almeno uno strato adesivo 3. With reference to Figures 1 to 3, it can be seen that the sheet 1 according to a first embodiment comprises at least one polymeric layer 2 having two surfaces. One or more layers of filter paper 4 are applied to a surface, for example the upper surface, of the polymeric layer 2 by means of at least one adhesive layer 3.
Gli strati di carta filtro 4 coprono preferibilmente solo alcune aree dello strato polimerico 2 in modo che una o più porzioni 2a, 2b dello strato polimerico 2 non sono coperte da uno strato di carta filtro 4. The layers of filter paper 4 preferably cover only some areas of the polymeric layer 2 so that one or more portions 2a, 2b of the polymeric layer 2 are not covered by a layer of filter paper 4.
Lo strato polimerico 2 è inoltre provvisto di almeno un’incisione 5 che collega le due superfici dello strato polimerico 2. In particolare, l’incisione 5 può essere rettilinea o curvilinea oppure, come nella presente forma realizzativa, chiusa in modo da definire nello strato polimerico 2 almeno un’apertura, in particolare quattro aperture aventi una forma sostanzialmente ellittica. Lo strato adesivo 3 è applicato preferibilmente sullo strato polimerico 2 solo nelle porzioni coperte dagli strati di carta filtro 4, lasciando quindi senza adesivo le porzioni scoperte 2a, 2b. The polymeric layer 2 is also provided with at least one incision 5 which connects the two surfaces of the polymeric layer 2. In particular, the incision 5 can be rectilinear or curvilinear or, as in the present embodiment, closed so as to define in the layer polymer 2 at least one opening, in particular four openings having a substantially elliptical shape. The adhesive layer 3 is preferably applied to the polymeric layer 2 only in the portions covered by the layers of filter paper 4, thus leaving the uncovered portions 2a, 2b without adhesive.
Gli strati di carta filtro 4 coprono le incisioni 5, in modo che gas, per esempio vapore acqueo, possono attraversare il foglio 1 attraverso gli strati di carta filtro 4 e le incisioni 5. The layers of filter paper 4 cover the incisions 5, so that gases, for example water vapor, can pass through the sheet 1 through the layers of filter paper 4 and the incisions 5.
Lo strato polimerico 2 e/o gli strati di carta filtro 4 presentano una forma preferibilmente rettangolare. In particolare, uno o più strati di carta filtro 4 non sovrapposti sono applicati sullo strato polimerico 2 in modo da formare una o più bande sostanzialmente parallele che si estendono tra due bordi opposti dello strato polimerico 2. Tali bande definiscono preferibilmente almeno due porzioni laterali 2a e/o almeno una porzione intermedia 2b in cui lo strato polimerico 2 non è coperto dagli strati di carta filtro 4. Le porzioni laterali 2a possono essere disposte lungo i lati minori, come nella presente forma realizzativa, e/o lungo i lati maggiori del foglio polimerico 2, per favorire la chiusura del foglio 1 per formare un involucro. Lo strato polimerico 2 è preferibilmente trasparente. The polymeric layer 2 and / or the layers of filter paper 4 have a preferably rectangular shape. In particular, one or more non-overlapping layers of filter paper 4 are applied on the polymeric layer 2 so as to form one or more substantially parallel bands extending between two opposite edges of the polymeric layer 2. These bands preferably define at least two side portions 2a and / or at least an intermediate portion 2b in which the polymeric layer 2 is not covered by the layers of filter paper 4. The side portions 2a can be arranged along the shorter sides, as in the present embodiment, and / or along the longer sides of the polymeric sheet 2, to assist in closing the sheet 1 to form an envelope. The polymeric layer 2 is preferably transparent.
La carta filtro 4 comprende preferibilmente almeno 80% in peso di un materiale fibroso, in particolare fibre naturali, più in particolare cellulosa. La grammatura della carta filtro 4 è compresa tra 30 e 90 g/m<2>, in particolare tra 40 e 70 g/m<2>, preferibilmente tra 48 e 51 g/m<2>. Lo spessore dello strato di carta filtro 4 è compreso tra 5 e 25 mm. Lo strato polimerico 2, lo strato adesivo 3 e lo strato di carta filtro 4 resistono preferibilmente alle temperature dei forni per alimenti, in particolare almeno 150 °C, più in particolare almeno 200 °C. Tale resistenza al calore può essere ottenuta per esempio tramite un bagno chimico in acido solforico od in cloruro di zinco e/o in una qualunque sostanza atta a creare una struttura reticolata all’interno delle catene polimeriche di cui è composta la cellulosa. La carta filtro 4 può essere rivestita da un materiale ad elevata resistenza termica, per esempio una gomma siliconica, che può essere provvisto di pori per il passaggio di gas. La carta filtro 4 può comprendere altre fibre naturali come fibre di alpaca e/o fibre artificiali come fibre di rayon. The filter paper 4 preferably comprises at least 80% by weight of a fibrous material, in particular natural fibers, more particularly cellulose. The weight of the filter paper 4 is between 30 and 90 g / m <2>, in particular between 40 and 70 g / m <2>, preferably between 48 and 51 g / m <2>. The thickness of the filter paper layer 4 is between 5 and 25 mm. The polymeric layer 2, the adhesive layer 3 and the filter paper layer 4 preferably withstand the temperatures of food ovens, in particular at least 150 ° C, more particularly at least 200 ° C. This heat resistance can be obtained for example through a chemical bath in sulfuric acid or in zinc chloride and / or in any substance capable of creating a cross-linked structure within the polymer chains of which the cellulose is composed. The filter paper 4 can be coated with a material with high thermal resistance, for example a silicone rubber, which can be provided with pores for the passage of gas. The filter paper 4 may comprise other natural fibers such as alpaca fibers and / or artificial fibers such as rayon fibers.
La carta filtro 4 può presentare conformazioni e resistenze meccaniche differenti a seconda che sia prodotta per esempio in una conformazione liscia, ruvida o crespa. Tra queste, la carta ruvida e la carta crespa forniscono generalmente un'area di filtrazione maggiore ed offrono alte velocità di filtrazione. La carta crespa offre preferibilmente anche una più elevata capacità di trattenere il particolato rispetto alla carta liscia. The filter paper 4 can have different conformations and mechanical strengths depending on whether it is produced for example in a smooth, rough or crepe conformation. Among these, textured paper and crepe paper generally provide a larger filtration area and offer high filtration rates. Crepe paper preferably also offers a higher capacity to retain particles than smooth paper.
Lo strato polimerico 2 può essere ottenuto usando uno o più strati di PET, PA, PP cast o PP coestruso. In particolare, lo strato polimerico 2 comprende preferibilmente PET con un rivestimento di Mylar, sul quale due strati di carta filtro 4 in cellulosa trattata ed unita a fibre di rayon sono applicati mediante uno strato di adesivo 3. The polymeric layer 2 can be obtained using one or more layers of PET, PA, cast PP or coextruded PP. In particular, the polymeric layer 2 preferably comprises PET with a Mylar coating, on which two layers of filter paper 4 made of treated cellulose and joined to rayon fibers are applied by means of a layer of adhesive 3.
Lo strato di adesivo 3 può essere costituito ad esempio da una dispersione in un solvente a base acqua, alcool, un adesivo monocomponente a base poliesterica, oppure bicomponente con poliestere e reagente. The adhesive layer 3 can be constituted, for example, by a dispersion in a water-based solvent, alcohol, a single-component polyester-based adhesive, or a two-component adhesive with polyester and reagent.
Facendo riferimento alla figura 4, si vede che in una prima fase operativa del processo di fabbricazione del foglio 1 secondo la prima forma realizzativa, un nastro 6, dello stesso materiale dello strato polimerico 2 e preferibilmente avvolto in una bobina 7, viene tirato nel verso delle frecce da uno o più rulli ausiliari 13. Uno o più rulli 10 creano incisioni 5 nel nastro 6 ad intervalli regolari tramite apposite fustelle, rimuovendo materiale in eccesso, mentre almeno un rullo 11 opportunamente sagomato ruota all’interno di una vasca 12 contenente un adesivo per applicare uno strato adesivo 3 sulla superficie inferiore del nastro 6 o sue porzioni. Uno o più nastri 8 sostanzialmente paralleli avvolti su bobine 9 sono tirati dai rulli 13 nella direzione delle frecce ed uniti al nastro 6 grazie allo strato adesivo 3. Il nastro laminato 14 così ottenuto viene preferibilmente avvolto su una bobina 15. In una fase operativa successiva, il nastro laminato 14 può essere prelevato dalla bobina 15 e tagliato per ottenere uno o più fogli 1 secondo la prima forma realizzativa. With reference to figure 4, it can be seen that in a first operative phase of the manufacturing process of the sheet 1 according to the first embodiment, a tape 6, of the same material as the polymeric layer 2 and preferably wound in a reel 7, is pulled in the direction arrows from one or more auxiliary rollers 13. One or more rollers 10 create incisions 5 in the belt 6 at regular intervals by means of suitable punches, removing excess material, while at least one suitably shaped roller 11 rotates inside a tank 12 containing a adhesive for applying an adhesive layer 3 to the lower surface of the tape 6 or portions thereof. One or more substantially parallel tapes 8 wound on reels 9 are pulled by the rollers 13 in the direction of the arrows and joined to the tape 6 thanks to the adhesive layer 3. The laminated tape 14 thus obtained is preferably wound on a reel 15. In a subsequent operating step , the laminated strip 14 can be taken from the reel 15 and cut to obtain one or more sheets 1 according to the first embodiment.
Facendo riferimento alla figura 5, si vede che un foglio 1 può essere impiegato per formare un involucro atto a contenere uno o più articoli, ad esempio un pezzo di pane 16. In una prima fase operativa il foglio 1 viene piegato, preferibilmente con lo strato di carta forno 4 all’esterno, dopodiché i bordi corrispondenti alle due porzioni laterali 2a dello strato polimerico 2 sono termosaldati, creando così una struttura sostanzialmente tubolare avente le estremità aperte ed una nervatura longitudinale corrispondente alle due porzioni laterali 2a unite tra loro. Il pezzo di pane 16 viene quindi inserito nella struttura sostanzialmente tubolare attraverso una base aperta. With reference to Figure 5, it can be seen that a sheet 1 can be used to form an envelope suitable for containing one or more articles, for example a piece of bread 16. In a first operating step, the sheet 1 is folded, preferably with the layer of parchment paper 4 on the outside, after which the edges corresponding to the two side portions 2a of the polymeric layer 2 are heat-sealed, thus creating a substantially tubular structure having open ends and a longitudinal rib corresponding to the two side portions 2a joined together. The piece of bread 16 is then inserted into the substantially tubular structure through an open base.
Facendo riferimento alla figura 6, si vede che in una fase successiva di fabbricazione dell'involucro, le due aperture alle estremità della struttura sostanzialmente tubolare vengono chiuse unendo tra loro e poi termosaldando due porzioni di entrambi gli altri bordi dello strato polimerico 2, formando così due ulteriori nervature 17 che completano la chiusura dell’involucro. Referring to Figure 6, it can be seen that in a subsequent step of manufacturing the envelope, the two openings at the ends of the substantially tubular structure are closed by joining together and then heat-sealing two portions of both other edges of the polymeric layer 2, thus forming two further ribs 17 which complete the closure of the casing.
Un procedimento alternativo di fabbricazione dell’involucro, non mostrato nelle figure, comprende invece la piegatura e la sovrapposizione di due metà del nastro laminato 14 lungo l’asse longitudinale, lasciando preferibilmente la carta forno 4 all’esterno, in modo che le porzioni laterali 2a dello strato polimerico 2 combacino. Successivamente, le porzioni laterali 2a sono termosaldate e viene inoltre realizzata un’ulteriore saldatura trasversale, ossia sostanzialmente perpendicolare ai bordi del nastro laminato 14, così da creare una tasca nella quale viene inserito almeno un articolo. Un’ulteriore saldatura trasversale viene formata nel nastro laminato 14, in modo da formare un involucro chiuso contenente l’articolo, Tale involucro chiuso può quindi essere separato dal resto del nastro laminato 14 mediante un taglio trasversale, ad esempio eseguito da una taglierina automatica. An alternative method of manufacturing the wrapper, not shown in the figures, instead comprises the folding and overlapping of two halves of the laminated strip 14 along the longitudinal axis, preferably leaving the parchment paper 4 on the outside, so that the lateral portions 2a of the polymeric layer 2 mate. Subsequently, the side portions 2a are heat-sealed and a further transverse welding is also made, ie substantially perpendicular to the edges of the laminated strip 14, so as to create a pocket in which at least one article is inserted. A further transverse seal is formed in the laminated strip 14, so as to form a closed envelope containing the article. This closed envelope can then be separated from the rest of the laminated strip 14 by means of a transverse cut, for example performed by an automatic cutter.
Facendo riferimento alla figura 7, si vede che il foglio 1 secondo una seconda forma realizzativa è simile alla prima forma realizzativa ma comprende almeno due strati polimerici 2 provvisti di una o più incisioni 5. Uno o più strati di carta filtro 4 sono disposti tra i due strati polimerici 2 e sono uniti ad essi mediante almeno due strati adesivi 3 applicati sulle superfici degli strati polimerici 2 a contatto con gli strati di carta filtro 4. Le incisioni 5 sono coperte dagli strati di carta filtro 4, in modo che gas possono attraversare il foglio 1 attraverso almeno due incisioni 5 ed uno strato di carta filtro 4 disposto tra queste due incisioni 5. With reference to Figure 7, it can be seen that the sheet 1 according to a second embodiment is similar to the first embodiment but comprises at least two polymeric layers 2 provided with one or more incisions 5. One or more layers of filter paper 4 are arranged between the two polymeric layers 2 and are joined to them by at least two adhesive layers 3 applied on the surfaces of the polymeric layers 2 in contact with the layers of filter paper 4. The incisions 5 are covered by the layers of filter paper 4, so that gas can pass through the sheet 1 through at least two incisions 5 and a layer of filter paper 4 arranged between these two incisions 5.
Facendo riferimento alla figura 8, si vede che in una prima fase operativa del processo di fabbricazione della seconda forma realizzativa del foglio 1, due nastri 6, dello stesso materiale dello strato polimerico 2 e preferibilmente avvolti in due bobine 7, vengono tirati nel verso delle frecce da uno o più rulli ausiliari 13. Le bobine 7 sono disposte preferibilmente ad altezze diverse ed i due nastri 6 formano in questo modo un ramo superiore ed un ramo inferiore che vengono tirati dai rulli ausiliari 13, in modo che i nastri 6 possono essere uniti ad uno o più nastri 8 di carta filtro dopo che viene applicato uno strato adesivo 3 su di essi. Il nastro laminato 18 così ottenuto è preferibilmente avvolto su una bobina 15 e può essere impiegato per realizzare un involucro simile a quello ottenuto con la prima forma realizzativa del foglio 1. With reference to figure 8, it can be seen that in a first operative phase of the manufacturing process of the second embodiment of the sheet 1, two tapes 6, of the same material as the polymeric layer 2 and preferably wound in two coils 7, are pulled in the direction of the arrows from one or more auxiliary rollers 13. The reels 7 are preferably arranged at different heights and the two belts 6 thus form an upper and a lower branch which are pulled by the auxiliary rollers 13, so that the belts 6 can be joined to one or more filter paper tapes 8 after an adhesive layer 3 is applied to them. The laminated tape 18 thus obtained is preferably wound on a reel 15 and can be used to make a wrapper similar to that obtained with the first embodiment of the sheet 1.
Eventuali varianti od aggiunte possono essere apportate dagli esperti del ramo alle forme realizzative qui descritte ed illustrate restando nell’ambito delle seguenti rivendicazioni. Ulteriori forme realizzative possono comprendere le caratteristiche tecniche di una delle seguenti rivendicazioni con l’aggiunta di una o più caratteristiche tecniche descritte nel testo od illustrate nei disegni, prese singolarmente od in qualsiasi combinazione reciproca. Any variations or additions can be made by those skilled in the art to the embodiments described and illustrated herein, remaining within the scope of the following claims. Further embodiments may include the technical characteristics of one of the following claims with the addition of one or more technical characteristics described in the text or illustrated in the drawings, taken individually or in any reciprocal combination.
Claims (12)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102018000010453A IT201800010453A1 (en) | 2018-11-20 | 2018-11-20 | Food foil and wrapper, as well as processes for making this foil or wrapper |
| EP19808901.3A EP3883861A1 (en) | 2018-11-20 | 2019-11-20 | Sheet and packaging for food, as well as processes for manufacturing this sheet or packaging |
| PCT/IB2019/059963 WO2020104958A1 (en) | 2018-11-20 | 2019-11-20 | Sheet and packaging for food, as well as processes for manufacturing this sheet or packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102018000010453A IT201800010453A1 (en) | 2018-11-20 | 2018-11-20 | Food foil and wrapper, as well as processes for making this foil or wrapper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IT201800010453A1 true IT201800010453A1 (en) | 2020-05-20 |
Family
ID=65496910
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IT102018000010453A IT201800010453A1 (en) | 2018-11-20 | 2018-11-20 | Food foil and wrapper, as well as processes for making this foil or wrapper |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3883861A1 (en) |
| IT (1) | IT201800010453A1 (en) |
| WO (1) | WO2020104958A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201900022737A1 (en) * | 2019-12-02 | 2021-06-02 | Dr Schaer S P A | PACKAGING CASE FOR FOOD PRODUCTS |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2997224A (en) * | 1958-11-05 | 1961-08-22 | Forrest B Stannard | Packaging container |
| EP2070831A1 (en) * | 2006-10-02 | 2009-06-17 | Cristóbal Meseguer, S.A. | Continuous band for producing bags for fruit and vegetable products |
| EP3028953A1 (en) * | 2013-07-31 | 2016-06-08 | Cristóbal Meseguer, S.A. | Simplified continuous strip for producing bags for fruit and vegetable products and the like |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3229813A (en) * | 1959-05-08 | 1966-01-18 | Johnson & Johnson | Sterile package |
| US3410395A (en) * | 1967-07-14 | 1968-11-12 | Gen Binding Corp | Steam sterilizable package and method of making the same |
| DE3420129A1 (en) * | 1984-05-30 | 1985-12-05 | geb. Woitzik Helga 8414 Maxhütte-Haidhof Lischka | Multi-layer packaging material |
-
2018
- 2018-11-20 IT IT102018000010453A patent/IT201800010453A1/en unknown
-
2019
- 2019-11-20 EP EP19808901.3A patent/EP3883861A1/en active Pending
- 2019-11-20 WO PCT/IB2019/059963 patent/WO2020104958A1/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2997224A (en) * | 1958-11-05 | 1961-08-22 | Forrest B Stannard | Packaging container |
| EP2070831A1 (en) * | 2006-10-02 | 2009-06-17 | Cristóbal Meseguer, S.A. | Continuous band for producing bags for fruit and vegetable products |
| EP3028953A1 (en) * | 2013-07-31 | 2016-06-08 | Cristóbal Meseguer, S.A. | Simplified continuous strip for producing bags for fruit and vegetable products and the like |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020104958A1 (en) | 2020-05-28 |
| EP3883861A1 (en) | 2021-09-29 |
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