WO2023281146A1 - Stratifié et élément tubulaire continu pour la formation de sacs et sac pour produits alimentaires - Google Patents

Stratifié et élément tubulaire continu pour la formation de sacs et sac pour produits alimentaires Download PDF

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Publication number
WO2023281146A1
WO2023281146A1 PCT/ES2022/070430 ES2022070430W WO2023281146A1 WO 2023281146 A1 WO2023281146 A1 WO 2023281146A1 ES 2022070430 W ES2022070430 W ES 2022070430W WO 2023281146 A1 WO2023281146 A1 WO 2023281146A1
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WO
WIPO (PCT)
Prior art keywords
continuous
formation
laminate
bag
layer
Prior art date
Application number
PCT/ES2022/070430
Other languages
English (en)
Spanish (es)
Inventor
Juan Carlos De Clasca Cabre
Original Assignee
Newco Classpack Partners, S.L.
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 Newco Classpack Partners, S.L. filed Critical Newco Classpack Partners, S.L.
Publication of WO2023281146A1 publication Critical patent/WO2023281146A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/06—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/06—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
    • B65D85/34—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for fruit, e.g. apples, oranges or tomatoes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Definitions

  • the present invention refers to a laminate and a continuous tubular for the formation of bags intended to contain food products in general, and more especially packaged ready-to-eat fresh products.
  • Whose ecological configuration avoids the use of plastics of fossil origin and any other non-biodegradable plastic, such as polypropylene (PP), polyethylene (PE) or bioriented polypropylene (BOPP), and whose structural configuration simplifies the manufacturing process and winding of the same, for its later use in packaging machines where the filling and closing of the bags is carried out.
  • PP polypropylene
  • PE polyethylene
  • BOPP bioriented polypropylene
  • the present invention also refers to a bag for containing food products obtained from said continuous laminate or tubular, whose configuration increases the durability of the packaged product, in addition to significantly improving the performance of presentation to the public of the final product.
  • Continuous tubulars for the formation of bags also known as preformed tubulars, have meant an important advance in the food packaging industry in general, and especially in that of fruit and vegetable products and the like. These tubulars are supplied rolled in reels for later loading into packaging machines. During the packaging process, the machine feeds the preformed tubular to take it continuously and automatically to the filling station, where the bag is formed and the product is filled in successive stations. An example of them can be seen in document ES2600306A1.
  • the present invention solves the problems previously exposed by means of a laminate and a continuous tubular for the formation of bags, as well as a bag for food products obtained from them, whose configuration presents an effective combination and arrangement of materials that, in addition to complying with With current environmental requirements, it allows preserving and/or improving the above-mentioned benefits of this type of product.
  • the continuous laminate for the formation of bags of the present invention comprises: a first layer formed by a bioplastic film; Y - a second layer formed by at least one sheet of paper (adhered to the first layer, partially or totally covering said first layer.
  • the first layer of bioplastic film comprises at least one closure area devoid of sheets of paper, said closure area being arranged along a longitudinal end of the laminate.
  • This closure area has the technical effect of leaving a reserve of bioplastic material not covered by other materials to allow longitudinal closure of the continuous laminate on itself by overlapping and heat-sealing its longitudinal ends.
  • the first layer of bioplastic film comprises at least one exposure area devoid of sheets of paper, said exposure area being arranged in a central area of the laminate.
  • This display area or window has the technical effect of allowing a better visualization of the packaged product once inside the bag, while its combination with the sheet or sheets of paper gives said bag greater visual appeal and/or a certain rustic look.
  • the exposure zone or zones can be arranged in other locations of the continuous laminate, beyond the central zone, either in lateral, lower and/or upper zones thereof.
  • the display area of the packaged product can, however, be done in other ways, beyond leaving spaces of bioplastic film uncovered between one or more sheets of paper.
  • the paper sheet comprises one or more exposure openings. This makes it possible to further improve the final finish of the bag, making its presentation and design even more attractive.
  • said exposure openings can have various shapes and/or sizes, combinable with each other, and also combinable with the presence or not of other exposure areas of the above type.
  • the second layer is formed by a sheet of paper adhered to the first layer, partially or totally covering said first layer.
  • the second layer comprises a first sheet of paper and a second sheet of paper.
  • the number of sheets of paper can be greater than two. (three, four, five%) according to the final design of the bag to be manufactured, as well as other technical conditions. For all cases with multiple sheets of paper, these can be arranged on the bioplastic film in various ways, either vertically or horizontally, as well as their possible combinations.
  • bioplastic extends to any simple or compound material of the "biobased” type, that is to say that it derives from vegetable products and/or from renewable sources of agricultural products, and that presents a biodegradable and/or compostable character. Coming from natural sources and not from fossil sources.
  • the bioplastic film is made of polylactic acid (PLA), polyhydroxyalkanoates (PHA), or polybutylene succinate (PBS).
  • PHA polylactic acid
  • PBS polybutylene succinate
  • the bioplastic film is polylactic acid (PLA) composed of lactic acid, corn starch and/or cane sugar.
  • the first layer of bioplastic film has a thickness of 17 to 50 microns, and more preferably approximately 20 microns. With grammages that can go from 21.1 g/m 2 to 62.0 g/m 2 , and more preferably of 24.8 g/m 2 approx.
  • paper is extended to any simple or compound material, such as paper, laminated paper, waxed paper, paper-cardboard, etc.
  • each sheet of paper has a weight of 15 to 36 g/m 2 .
  • each paper sheet is made of raw cellulose.
  • the first layer is joined to the second layer by organic glue, preferably compostable, with amounts less than 2 g/m 2 , such as 1.5 g/m 2 .
  • organic glue preferably compostable
  • Other ways of joining these layers contemplate the use of heat, heat welding, or ultraviolet light, preferably combined with pressure.
  • bioplastic film with one or more sheets of paper produces multiple technical effects, the sum of part or all of which produces a clear synergistic effect as explained below.
  • a combination limits the transfer of oxygen.
  • bioplastic film and, more especially, polylactic acid (PLA) film has a high oxygen penetration rate, more accentuated in thinner films.
  • PVA polylactic acid
  • This aspect can affect the durability of the packaged product.
  • the presence of paper limits the exposed and/or uncovered surface of the bioplastic film, leaving it reduced in some cases to the display area of the packaged product, which can be around a third of the total outer surface of the laminate (which is visible once the bag is formed).
  • the paper therefore reduces the transpiration surface, preventing the entry of oxygen. This is known as the “barrier effect” of the paper, and it allows the durability of the packaged product to multiply, going in some cases from 5 to 15 days, or more.
  • bioplastics including polylactic acid (PLA)
  • PLA polylactic acid
  • the combination of bioplastic film and paper manages to cancel said electrostatic charge, allowing its correct handling without dirtying the welding equipment, and at the same time offering a consistent support to protect the welder and facilitate his work.
  • bioplastic film and paper offers consistency to the continuous laminate, so that when folded it does not produce cracks that generate leaks. Bliss consistency makes it also indicated for the application of modified atmospheres once the container has been formed, as well as to guarantee adequate transport, stacking and storage of the laminate.
  • the laminate is printable with conventional methods on its entire surface.
  • bioplastic film allows the passage of water vapor, it does not allow the passage of oils or liquid water, therefore being impermeable in this sense.
  • the present invention also relates to a continuous tubular for the formation of bags.
  • Said tubular includes:
  • the frontal band, the dorsal band and the two lateral bands define an inner surface of the continuous tubular made entirely of bioplastic film.
  • This inner surface is the one intended to be in contact with the product. packing.
  • the frontal band and the back band have reinforcing lateral ends; while the lateral bands present joining lateral ends.
  • the reinforcing lateral ends are folded over the corresponding joining lateral ends in the manner of a hem, to reinforce the union of the lateral bands to the frontal band and the dorsal band. This confers greater resistance to the tubular, and to the bag obtained from it.
  • the side bands are joined to the front band and to the back band by means of heat welding.
  • the bioplastic film of the two side bands is made of polylactic acid (PLA), polyhydroxyalkanoates (PHA), or polybutylene succinate (PBS).
  • PLA polylactic acid
  • PHA polyhydroxyalkanoates
  • PBS polybutylene succinate
  • the bioplastic film of the two lateral bands is polylactic acid (PLA) composed of lactic acid, corn starch and/or cane sugar.
  • PLA polylactic acid
  • the union by heat welding of PLA film with PLA film is practically perfect, it seals and welds very well.
  • the bioplastic film of the two lateral bands has a thickness of 17 to 50 microns, and more preferably of approximately 20 microns.
  • grammages that can go from 21.1 g/m 2 to 62.0 g/m 2 , and more preferably of 24.8 g/m 2 approx.
  • the present invention also refers to a bag for food products, comprising:
  • the containment space has a contact surface with the Packaged product made up entirely of bioplastic film.
  • the bioplastic film that makes up the contact surface is made of polylactic acid (PLA), polyhydroxyalkanoates (PHA), or polybutylene succinate (PBS).
  • PLA polylactic acid
  • PHA polyhydroxyalkanoates
  • PBS polybutylene succinate
  • the bioplastic film that makes up the contact surface is polylactic acid (PLA) composed of lactic acid, corn starch and/or cane sugar.
  • PLA polylactic acid
  • the containment space has a modified atmosphere, also known as a protective atmosphere.
  • a modified atmosphere also known as a protective atmosphere. This is produced by injecting an appropriate mixture of gases (oxygen, carbon dioxide and nitrogen) according to the respiration needs of the packaged product, which, occupying said space inside the bag, expels or displaces the oxygen, delaying the oxidation of the packaged product. and increasing its durability.
  • Figure 1 represents a general perspective view of a reel with the continuous laminate for the formation of bags of the present invention, where said continuous tubular has been wound on the reel starting from an open or unfolded position thereof.
  • Figure 2 represents a general perspective view of a reel with the continuous laminate for the formation of bags of the present invention, where said continuous tubular has been wound on the reel starting from a semi-closed or semi-folded position thereof.
  • Figure 3 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a first configuration example of the same.
  • Figure 4 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a second configuration example thereof.
  • Figure 5 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a third configuration example thereof.
  • Figure 6 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a fourth configuration example thereof.
  • Figure 7 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a fifth configuration example thereof.
  • Figure 8 represents a front portion of the continuous laminate for the formation of bags of the present invention, according to a sixth configuration example thereof.
  • Figure 9 represents a front view of a bag for foodstuffs of the present invention, obtained by means of a continuous laminate such as that of Figs. 3 or 4.
  • Figure 10 represents a front view of a bag for foodstuffs of the present invention, obtained by means of a continuous laminate such as that of Figs. 5 or 6.
  • Figure 11 represents a front view of a bag for foodstuffs of the present invention, obtained by means of a continuous laminate such as that of Figs. 7 or 8.
  • Figure 12 represents a dorsal view of a bag for foodstuffs of the present invention, obtained by means of a continuous laminate such as that of Figs. 3, 5 or 7, whose longitudinal ends are closed on themselves by overlapping and heat sealing them.
  • Figure 13 represents a schematic cross section of the bag of Fig. 12.
  • Figure 14 represents a dorsal view of a bag for food products of the present invention, obtained by means of a continuous laminate like that of Figs. 4, 6 or 8, whose longitudinal ends are closed on themselves by clamping and heat-sealing them.
  • Figure 15 represents a schematic cross section of the bag of Fig. 14.
  • Figure 16 represents a perspective view of the bag for food products of the present invention, obtained by means of an open or unfolded continuous laminate like the one in Figure 1.
  • Figure 17 represents a perspective view of the bag for food products of the present invention, obtained by means of a semi-closed or semi-deployed continuous laminate like the one in Fig. 2.
  • Figure 18 represents a general perspective view of a reel with the continuous tubular for the formation of bags of the present invention.
  • Figures 19a - 19d show a sequence of the joining process of the elements that make up the continuous tubular of Fig. 18, illustrated by cross sections thereof.
  • Figure 20 shows a perspective view of a portion of the continuous tubular of Fig. 18.
  • Figure 21 represents a perspective view of the bag for food products of the present invention, obtained by means of the continuous tubular of Fig. 18.
  • Figures 22a and 22b represent a way of using the bag for food products of the present invention.
  • Figure 23a represents a perspective view of the bag for food products of the present invention, according to another embodiment.
  • Figure 23b represents a longitudinal section of the bag for food products of Fig. 23a.
  • Figures 24a-24c depict perspective views of various food pouches of the present invention with different sizes of window or display area.
  • Figure 25 depicts a schematic profile view of the continuous pouch-forming laminate of the present invention with continuously distributed adhesive application.
  • Figure 26 represents a schematic profile view of the continuous laminate for forming bags of the present invention with application of adhesive distributed discontinuously.
  • Figure 1 shows a reel with the continuous laminate (1) for the formation of bags of the present invention.
  • the coil has been formed by winding a continuous laminate (1) that started from an open or unfolded arrangement.
  • This reel can be easily implemented in new or existing packaging machines, in order to carry out the filling of the product and at the same time the final shaping of the bag.
  • Figure 2 shows a reel with the continuous laminate (1) for the formation of bags of the present invention.
  • the coil has been formed by winding a continuous laminate (1) that started from a semi-closed or semi-folded arrangement, that is, folded in half on itself.
  • said reel can be easily implemented in new or existing packaging machines, in order to carry out the filling of the product and, at the same time, the final shaping of the bag.
  • Figure 3 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a first configuration example thereof.
  • the continuous laminate (1) comprises:
  • the first layer (2) of bioplastic film (21) comprises a closure area (22) devoid of a sheet of paper (31), said closure area (22) being arranged along a longitudinal end (1L) of the laminate (1).
  • This closure zone (22) allows leaving a reserve of bioplastic material not covered by other materials to allow longitudinal closure of the continuous laminate (1) during the formation of the bag (1B), folding it on itself around its longitudinal axis ( 1y), and joining said closure area (22) by overlapping (1S) and heat sealing with the bioplastic film (21) arranged at the opposite longitudinal end (1 L) on the back side of the continuous laminate (1), as as shown in Fig. 13.
  • Figure 4 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a second configuration example thereof.
  • the continuous laminate (1) comprises:
  • the first layer (2) of bioplastic film (21) is devoid of a closure area (22).
  • the continuous laminate (1) is likewise folded on itself around its longitudinal axis (1 y) until its longitudinal ends (1 L) meet. Said longitudinal ends (1 L) are then clamped on the back side of the continuous laminate (1), so that a union of bioplastic film (21) with bioplastic film (21) is produced. This allows the longitudinal closure of the continuous laminate (1) by clamping (1 P) and heat-sealing the inner face of the longitudinal ends (1 L), as shown in Fig. 14.
  • Figure 5 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a third configuration example thereof.
  • the continuous laminate (1) comprises:
  • a second layer (3) made up of a first sheet of paper (31) and a second sheet of paper (32) adhered to the first layer (2), partially covering said first layer (2).
  • the first layer (2) of bioplastic film (21) comprises a closure area (22) devoid of a sheet of paper (31), said closure area (22) being arranged along a longitudinal end (1L) of the laminate (1).
  • This closure zone (22) allows leaving a reserve of bioplastic material not covered by other materials to allow longitudinal closure of the continuous laminate (1) during the formation of the bag (1B), folding it on itself around its longitudinal axis ( 1y), and joining said closure area (22) by overlapping (1S) and heat sealing with the bioplastic film (21) arranged at the opposite longitudinal end (1 L) on the back side of the continuous laminate (1), as as shown in Fig. 13.
  • the first layer (2) of bioplastic film (21) comprises an exposure area (23) devoid of sheets of paper (31, 32), said exposure area (23) being arranged in a central area (1C) of the laminate. (one).
  • This exposure area (23) or window allows a better visualization of the packaged product once inside the bag (1 B), while its combination of sheets of paper (31, 32) gives said bag (1 B ) a greater visual appeal and/or a certain rustic appearance.
  • Figure 6 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a fourth configuration example thereof.
  • the continuous laminate (1) comprises:
  • a second layer (3) made up of a first sheet of paper (31) and a second sheet of paper (32) adhered to the first layer (2), partially covering said first layer (2).
  • the first layer (2) of bioplastic film (21) is devoid of a closure zone (22).
  • the continuous laminate (1) is likewise folded on itself around its longitudinal axis (1y) until its longitudinal ends (1 L) meet. Said longitudinal ends (1 L) are then clamped by the dorsal face of the continuous laminate (1), so that a bioplastic film (21) with bioplastic film (21) is joined. This allows the longitudinal closure of the continuous laminate (1) by clamping (1 P) and heat-sealing the inner face of the longitudinal ends (1 L), as shown in Fig. 14.
  • the first layer (2) of bioplastic film (21) comprises an exposure area (23) devoid of sheets of paper (31, 32), said exposure area (23) being arranged in a central area (1C) of the laminate. (one).
  • This exposure area (23) or window allows a better visualization of the packaged product once inside the bag (1B), while its combination of sheets of paper (31, 32) gives said bag (1B) a greater visual appeal and/or a certain rustic aspect.
  • Figure 7 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a fifth configuration example thereof.
  • the continuous laminate (1) comprises:
  • the first layer (2) of bioplastic film (21) comprises a closure area (22) devoid of a sheet of paper (31), said closure area (22) being arranged along the along one longitudinal end (1L) of the laminate (1).
  • This closure zone (22) allows leaving a reserve of bioplastic material not covered by other materials to allow longitudinal closure of the continuous laminate (1) during the formation of the bag (1B), folding it on itself around its longitudinal axis ( 1y), and joining said closure area (22) by overlapping (1S) and heat sealing with the bioplastic film (21) arranged at the opposite longitudinal end (1 L) on the back side of the continuous laminate (1), as as shown in Fig. 13.
  • the first layer (2) of bioplastic film (21) comprises multiple circular exposure zones (23) devoid of the paper sheet (31), said exposure zones (23) being arranged in a central zone (1C) of the laminate. (one).
  • said exposure areas (23) are formed by exposure openings (33) made in the sheet of paper (31) by punching the same.
  • Figure 8 shows a front portion of the continuous laminate (1) for forming bags of the present invention, according to a sixth configuration example thereof.
  • the continuous laminate (1) comprises:
  • the first layer (2) of bioplastic film (21) is devoid of a closure zone (22).
  • the continuous laminate (1) is likewise folded on itself around its longitudinal axis (1 y) until its longitudinal ends (1 L) meet. Said longitudinal ends (1L) are then clamped by the dorsal face of the continuous laminate (1), so that a bioplastic film (21) with bioplastic film (21) is joined. This allows the longitudinal closure of the continuous laminate (1) by clamping (1 P) and heat-sealing the inner face of the longitudinal ends (1L), as shown in Fig. 14.
  • the first layer (2) of bioplastic film (21) comprises multiple circular exposure areas (23) devoid of the sheet of paper (31), said areas of exposure (23) arranged in a central area (1C) of the laminate (1).
  • said exposure areas (23) are formed by exposure openings (33) made in the sheet of paper (31) by punching the same.
  • the back side of the continuous laminate (1) is completely made of bioplastic film (21), thus being intended to form the inside of the bags (1B) manufactured from said continuous laminate (1). That is, the part in contact with the packaged product.
  • the front face of the continuous laminate (1) is the one comprising the sheets of paper (31, 32), thus being intended to form the outer part of the bags (1B) manufactured from said continuous laminate (1 ). That is, the external part visible by consumers, without contact with the packaged product. This is shown in greater detail in the following figures.
  • Figure 9 shows a front view of a bag (1B) for food products of the present invention, obtained by means of a continuous laminate (1) like that of Figs. 3 or 4.
  • the transversal closures (1T) make up the base and the mouth of the bag (1B).
  • the bag (1B) has an internal part made entirely of bioplastic film (21), and an external part made entirely of a sheet of paper (31).
  • Figure 10 shows a front view of a bag (1B) for food products of the present invention, obtained by means of a continuous laminate (1) like that of Figs. 5 or 6.
  • the transversal closures (1T) make up the base and the mouth of the bag (1B).
  • the bag (1B) has an internal part made up entirely of bioplastic film (21), and an external part made up partially of sheets of paper (31, 32) between which there is a zone of exposure (23) of bioplastic film (21).
  • FIG 11 shows a front view of a bag (1B) for food products of the present invention, obtained by means of a continuous laminate (1) like that of Figs. 7 or 8.
  • the bag (1B) has an internal part made up entirely of bioplastic film (21), and an external part made up partially of a sheet of paper (31) with exposure openings (33) that They define multiple circular exposure zones (23) of bioplastic film (21).
  • the transversal closures (1T) are preferably made during the packaging process by using heat, heat welding, or ultraviolet light, preferably combined with pressure, allowing the fusion of facing strips of bioplastic film (21) arranged in the upper part. interior of the continuous laminate (1), once closed longitudinally.
  • the bags (1B) can be supplied directly with a single transverse closure (1T). That is, simply the bags (1B) without the packaged product, so that the consumers and/or distributors can use them as appropriate.
  • Figures 12 and 13 respectively show a dorsal view and a schematic cross section of a bag (1B) for food products obtained by means of a continuous laminate (1) like that of Figs. 3, 5 or 7, whose longitudinal ends (1 L) have been closed on themselves by overlapping (1S) and heat-sealing them.
  • the bag (1B) comprises a portion of continuous laminate (1) that is folded on itself and joined longitudinally and transversally to form a closed containment space (E) for the packaged product.
  • the containment space (E) has a contact surface (Si) with the packaged product made up entirely of bioplastic film (21).
  • the containment space (E) presents a modified atmosphere, also known as a protective atmosphere.
  • Figures 14 and 15 respectively show a dorsal view and a schematic cross section of a bag (1B) for food products obtained by means of a continuous laminate (1) like that of Figs. 4, 6 or 8, whose longitudinal ends (1 L) are closed on themselves by clamping (1 P) and heat-sealing them.
  • the bag (1B) comprises a portion of continuous laminate (1) that is folded on itself and joined longitudinally and transversely to form a closed containment space (E) for the packaged product.
  • the containment space (E) has a contact surface (Si) with the packaged product made up entirely of bioplastic film (21).
  • the containment space (E) presents a modified atmosphere, also known as a protective atmosphere.
  • Figure 16 shows a perspective view of the bag (1 B) for food products of the present invention, obtained by means of an open or unfolded continuous laminate (1) like the one in Fig. 1. In this case, it shows an example of a bag (1B) of the "salad roll" type.
  • Figure 17 shows a perspective view of the bag (1 B) for food products of the present invention, obtained by means of a semi-closed or semi-deployed continuous laminate (1) like the one in Fig. 2.
  • FIG. 17 shows an example of a bag (1 B) of the "pocket bag” type.
  • Figure 18 shows a general perspective view of a reel with the continuous tubular (10) for the formation of bags (10B) of the present invention.
  • said continuous tubular (10) comprises:
  • Two lateral bands (13, 14) each formed by a bioplastic film (21) attached to the front band (11) and to the back band (12).
  • the frontal band (11), the dorsal band (12) and the two lateral bands (13, 14) define an inner surface (1 Oi) of the continuous tubular (10) made entirely of bioplastic film (21).
  • This inner surface (1 Oi) is the one intended to be in contact with the packaged product.
  • Figures 19a - 19d show a sequence of the joining process of the elements that make up the continuous tubular (10) of Fig. 18, through cross sections thereof.
  • the front band (11) and the dorsal band (12) have reinforcing lateral ends (11a, 11b, 12a, 12b); while the lateral bands (13, 14) have lateral joining ends (131, 132, 141, 142).
  • the reinforcing lateral ends (11a, 11b, 12a, 12b) are folded over the corresponding joining lateral ends (131, 132, 141, 142) as a hem, to reinforce the union of the lateral bands. (13, 14) to the frontal band (11) and to the dorsal band (12). This confers greater resistance to the continuous tubular (10), and to the bag (10B) obtained from it.
  • Figure 20 shows a perspective view of a portion of the continuous tubular (10) of Fig. 18, once one of the transversal closures (10T) that make up the base or mouth of the bag (10B) has been made, as a passage prior to forming a closed containment space (E) for the packaged product, whose contact surface (Si) with the packaged product is made up entirely of bioplastic film (21).
  • a modified atmosphere also known as a protective atmosphere, is created inside the containment space (E).
  • Figure 21 shows a perspective view of the bag (10B) for food products of the present invention, obtained by means of the continuous tubular of Fig. 18. In this case, it shows an example of a "salad" type bag (10B). bag”.
  • the bags (10B) can be supplied directly with a single transverse closure (10T). That is to say, simply the bags (1B) without the packaged product, so that the consumers and/or distributors themselves can use them as appropriate, for example, as baskets.
  • Figures 22a and 22b show a way of using a bag (10B) for food products of the present invention of the "vision bag” type, which once cut transversely (Fig. 22a) forms a bowl (B) from which you can directly enjoy the product contained therein (Fig. 22b).
  • Figures 23a and 23b show a bag (10B) for food products of the present invention of the "vision bag” type, which includes a small bag (2B) of bioplastic film (21) inside. This bag (2B) can carry cutlery or envelopes for seasoning the packaged product, such as sauces, oil, salt, etc.
  • the bag (2B) is welded to the upper part or mouth of the bag (10B), thus remaining hanging and separated from the packaged product so as not to spoil and/or crush it.
  • Said union is preferably produced by heat welding between the bioplastic film (21) of the bag (2B) and the bioplastic film (21) that forms the interior contact surface (Si) of the bag (10B).
  • Said bioplastic film (21) can be made of polylactic acid (PLA), polyhydroxyalkanoates (PHA), or polybutylene succinate (PBS).
  • FIGs 24a - 24c show perspective views of various bags (1B) for food products of the present invention, in this case of the "salad bag” type, with different window sizes or display area (23).
  • Each of these bags (1 B) has an internal part made up entirely of bioplastic film (21), and an external part made up partially of sheets of paper (31, 32) between which there is an exposure area (23 ) of bioplastic film (21).
  • the configuration of the bags (1B, 10B) of the present invention allows to control the transfer of oxygen and natural water vapor from the bioplastic film (21).
  • the width and/or area of the window can vary so that its surface area is greater or lesser and, therefore, the respiration of the container as well.
  • the oxygen and vapor transmission rate can also be controlled and/or adjusted depending on the thickness of the bioplastic film (21).
  • the thickness of the bioplastic film (21) can be controlled and/or adjusted depending on the thickness of the bioplastic film (21).
  • tubular (10) or bag (1B, 10B) of the present invention possible atmospheres and "breaths” can be obtained depending on the product. packaging, to increase its durability and improve its organoleptic properties.
  • Figure 25 shows a schematic profile view of the continuous pouch-forming laminate of the present invention with continuously distributed adhesive application.
  • the first layer (2) of bioplastic film is joined to the second layer (3) of paper.
  • the polylactic acid (PLA) bioplastic film is a rigid material that does not vary dimensionally as a function of humidity when it is at a temperature of -22 °C to + 40 °C, except for the direct action of ultraviolet light.
  • raw cellulose paper is hygroscopic and varies in size since it has the ability to absorb moisture from the environment.
  • the union of these two materials with a continuous application of adhesive causes the laminate (1) to undergo changes depending on the humidity of the air, curving slightly as shown in Fig. 25.
  • Figure 26 shows a schematic profile view of the laminate for the formation of bags of the present invention with application of adhesive distributed in a discontinuous manner.
  • the first layer (2) of bioplastic film is joined to the second layer (3) of paper by means of spaced joint points or lines (4). That is to say, in this case an application of the adhesive is carried out by points or lines of union (4) distributed alternately.
  • the joint lines (4) are distributed in a spaced manner on the first layer (2) of polylactic acid (PLA) bioplastic film, with the paper on top. Once dried by passing through a heat tunnel at low temperature, the winding is left to rest for 24 to 48 hours. Once said time has elapsed, the complex obtained allows moisture absorption through the second layer (3) of paper and its expansion, creating small vaults between the joining lines (4) without deforming the laminate (1) when leaving it free. on a table.
  • the joint lines can preferably be distributed in lines of identical progress and alternating positions to achieve a greater homogeneity of the joint and absorption of dilation. This technique also means an adhesive saving of more than 85% compared to conventional lamination, which facilitates the subsequent composting of the product once used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Bag Frames (AREA)

Abstract

L'invention concerne un stratifié continu (1) pour la formation de sacs comprenant une première couche (2) constituée d'un film de bioplastique (21) ; et une seconde couche (3) constituée d'au moins une feuille de papier (31, 32) collée sur la première couche (2). L'invention concerne également un élément tubulaire continu (10) pour la formation de sacs qui comprend une bande avant (11) constituée d'un premier stratifié continu (1, 1F) ; une bande arrière (12) constituée d'un second stratifié continu (1, 1D) ; et deux bandes latérales (13, 14) constituées chacune d'un film de bioplastique (21). L'invention concerne enfin un sac pour produits alimentaires comprenant une partie de stratifié continu (1) repliée sur elle-même et reliée longitudinalement et transversalement pour former un espace de retenue (E) fermé du produit emballé ; ou une partie d'élément tubulaire continu (10) reliée transversalement pour former un espace de retenue (E) fermé du produit emballé.
PCT/ES2022/070430 2021-07-05 2022-07-05 Stratifié et élément tubulaire continu pour la formation de sacs et sac pour produits alimentaires WO2023281146A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESU202131386 2021-07-05
ES202131386U ES1274839U (es) 2021-07-05 2021-07-05 Laminado y tubular continuo para la formacion de bolsas y bolsa para productos alimenticios

Publications (1)

Publication Number Publication Date
WO2023281146A1 true WO2023281146A1 (fr) 2023-01-12

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004073077A (ja) * 2002-08-19 2004-03-11 Sumitomo Bakelite Co Ltd トマトの包装体
US20090116767A1 (en) * 2005-08-17 2009-05-07 Preformados Tubulaees, S.L. Continuous tube for forming bags containing fruit and vegetable products
US20150030265A1 (en) * 2012-03-07 2015-01-29 Mondi Halle Gmbh Side-gusset bag made of a plastic fabric composite, and method for the production thereof
US20150117800A1 (en) * 2013-10-25 2015-04-30 Hood Packaging Corporation Tubular bag having a window
ES2555276T3 (es) * 2011-07-20 2015-12-30 Walki Group Oy Papel o cartón revestido
US20160288466A1 (en) * 2015-04-02 2016-10-06 Shantu Patel Biopaper for Bags and Wrapping Paper
JP2017214072A (ja) * 2016-05-30 2017-12-07 フジフーズ株式会社 食品包装容器
EP3275799A1 (fr) * 2016-07-29 2018-01-31 Preformados Tubulares S.L. Tube mélangé en continu pour former des sacs et sac pour produits d'horticulture ou similaires obtenus à partir de celui-ci
WO2021010573A1 (fr) * 2019-07-17 2021-01-21 동원시스템즈 주식회사 Film stratifié destiné à être appliqué à un matériau d'emballage écologique présentant des propriétés de barrière élevées

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004073077A (ja) * 2002-08-19 2004-03-11 Sumitomo Bakelite Co Ltd トマトの包装体
US20090116767A1 (en) * 2005-08-17 2009-05-07 Preformados Tubulaees, S.L. Continuous tube for forming bags containing fruit and vegetable products
ES2555276T3 (es) * 2011-07-20 2015-12-30 Walki Group Oy Papel o cartón revestido
US20150030265A1 (en) * 2012-03-07 2015-01-29 Mondi Halle Gmbh Side-gusset bag made of a plastic fabric composite, and method for the production thereof
US20150117800A1 (en) * 2013-10-25 2015-04-30 Hood Packaging Corporation Tubular bag having a window
US20160288466A1 (en) * 2015-04-02 2016-10-06 Shantu Patel Biopaper for Bags and Wrapping Paper
JP2017214072A (ja) * 2016-05-30 2017-12-07 フジフーズ株式会社 食品包装容器
EP3275799A1 (fr) * 2016-07-29 2018-01-31 Preformados Tubulares S.L. Tube mélangé en continu pour former des sacs et sac pour produits d'horticulture ou similaires obtenus à partir de celui-ci
WO2021010573A1 (fr) * 2019-07-17 2021-01-21 동원시스템즈 주식회사 Film stratifié destiné à être appliqué à un matériau d'emballage écologique présentant des propriétés de barrière élevées

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