WO2023137571A1 - Water-soluble flexible fastening strip - Google Patents

Water-soluble flexible fastening strip Download PDF

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Publication number
WO2023137571A1
WO2023137571A1 PCT/CL2022/050008 CL2022050008W WO2023137571A1 WO 2023137571 A1 WO2023137571 A1 WO 2023137571A1 CL 2022050008 W CL2022050008 W CL 2022050008W WO 2023137571 A1 WO2023137571 A1 WO 2023137571A1
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WO
WIPO (PCT)
Prior art keywords
flexible
fastening tape
tape
environmentally friendly
flexible fastening
Prior art date
Application number
PCT/CL2022/050008
Other languages
Spanish (es)
French (fr)
Inventor
Alejandro Jose Castro Riquelme
Roberto Carlos ASTETE BOETTCHER
Cristian Andrés Olivares Matamala
Patricio Javier Cabezas Alamos
Original Assignee
Solubag Spa
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 Solubag Spa filed Critical Solubag Spa
Priority to PCT/CL2022/050008 priority Critical patent/WO2023137571A1/en
Publication of WO2023137571A1 publication Critical patent/WO2023137571A1/en

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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/30—Deformable or resilient metal or like strips or bands
    • 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
    • B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
    • B65D63/10—Non-metallic straps, tapes, or bands; Filamentary elements, e.g. strings, threads or wires; Joints between ends thereof
    • B65D63/12—Joints produced by deformation or tying of ends of elements
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
    • C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/14—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated alcohols, e.g. polyvinyl alcohol, or of their acetals or ketals
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process

Definitions

  • the present invention focuses on the field of fastening elements for closing bags or packages, in general, it refers to an aid accessory for closing or tying bags.
  • the present invention refers to a flexible, environmentally friendly fastening tape for tying bags or packaging of food products, which is capable of dissolving in a few minutes upon contact with water and being disposed of in an environmentally friendly way, reducing the tons of plastic generated by way of plastic waste that is disposed of in the trash.
  • the flexible fastening tape can fulfill the function of closing one access side of a flexible packaging, which at the time of its use strangles the neck of the packaging bag and its ends are twisted together to achieve the fixation or seal of the packaged elements.
  • Flexible fastening tapes are used for a variety of fastening and closure purposes.
  • flexible straps are used to seal a package that has an open end, such as a bag.
  • the packaging material adjacent to the open end is brought together.
  • the flexible straps are extended around the collected packaging material until the end portions of the flexible strap are adjacent to each other. The end portions are then twisted relative to the rest of the flexible fastening tape to fasten the flexible fastening tape to the package.
  • Flexible fastening tapes may include a flexible metal filament that is encased in a plastic material.
  • Flexible fastening tapes have many advantageous properties which have led to their widespread use, for example, flexible fastening tapes are easily applied by high speed manual or mechanical operations. In addition, the multiple clamping and disconnecting cycles that flexible fasteners are subjected to do not significantly affect their clamping ability.
  • flexible clamping tapes play an important role, as flexible clamping tapes allow consumers to quickly access and reseal a product package multiple times.
  • a disadvantage of the currently existing flexible fastening tapes is that consumers, after use, discard them and become part of the tons of plastic waste that is generated in the world. To overcome this difficulty, in the present invention a flexible, environmentally friendly fastening tape has been developed for tying bags or packages of all kinds of products, particularly food products.
  • the document DE 7615537 U discloses a clipband-type closure, which comprises a strip of plastic material that has reinforcing wires embedded along the longitudinal edges and that is provided with a longitudinal rib on the side of the closure, approximately in the center of the central body, between the longitudinal reinforced edges. This longitudinal rib is said to increase the grip of the closure and the stability of the closure.
  • Flexible fastening tapes are widely used today; Many packaged food products, such as vegetables and bread, are held and tied with flexible strapping. Flexible fastening tapes are also used to fasten household items, such as flexible tapes for fastening plants or cables inside or outside the home. It would be very difficult to do without them in the near future. However, with the abundance of flexible fastening tapes in production and use, there is a disposal problem. A good way to reduce the environmental impact of a product is to recycle said product, in this way, it enters the production circuit and forms part of the circular economy, however, in the case of flexible fastening tapes, given their small size, their recovery or collection is not feasible.
  • fastening tapes are made entirely of a flexible polymeric material with sufficient mechanical resistance to withstand small tensile stresses.
  • fastening tapes made of a covering material which is generally made of plastic (polyethylene) or paper (smooth or metallic), this material can cover metal wires that can be made of galvanized or stainless steel and measure between 0.410 and 0.0132 in diameter.
  • the material that forms the fastening tapes can be designed in various colors with or without printing. If you look at all the individual components that make up flexible fastening tapes, you can see why it's so difficult to recycle them. Each component is so small that it cannot be recycled into a new product. Therefore, all used flexible fastening tapes inevitably end up in landfills.
  • CiperChile Journalistic Investigation Center
  • Source refers to a report published by the UN, focusing mainly on what refers to plastic.
  • consumers should learn to reduce the use of single-use plastics and demand a reduction in the use of plastic in containers and packaging, with the priority being to replace plastic materials with more environmentally friendly raw materials. In other words, they degrade faster, they can have alternative applications in other uses and they eliminate the use of toxic chemical products in their design and manufacture.
  • One objective of the present invention is to provide a flexible fastening tape for tying bags or packaging of food products, where said tape is entirely water-soluble, with environmentally friendly materials, to reduce pollution caused by the increasing use of common plastic materials in articles used in daily life.
  • the inventors had designed non-woven fabric and plastic water-soluble bags, forming the Solubag company. In their studies, they arrived at a chemical formula based on polyvinyl alcohol (PVA) (a water-soluble material) to which they added other materials of natural origin, thus generating bags and materials that dissolve in contact with water, avoiding pollution of the oceans.
  • PVA polyvinyl alcohol
  • the inventors focused their efforts and research to develop a flexible fastening tape that was quickly dissolved and, in this way, solve the problem of contamination due to obsolete tapes and their disposal when they are no longer useful, which to date has not been anticipated by the prior state of the art.
  • a flexible, environmentally friendly fastening tape for tying bags or food product packaging which comprises a base body of flexible and moldable (or malleable) material formed from a water-soluble polymeric material such as polyvinyl alcohol resin and which can include at least one filament inserted along the length of the tape, the filament being mainly a flexible polymeric material, although a flexible metallic material is not ruled out.
  • Figure 1 Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a first embodiment of the present invention.
  • Figure 2 Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the first embodiment of the present invention is shown.
  • Figure 3 Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a second embodiment of the present invention, which includes an inserted filament.
  • Figure 4 Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the second embodiment of the present invention is shown.
  • Figure 5 Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a third embodiment of the present invention, which includes two inserted filaments.
  • Figure 6 Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the third embodiment of the present invention is shown.
  • Figure 7 Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a fourth embodiment of the present invention, which is in the form of a continuous thread.
  • Figure 8 Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the fourth embodiment of the present invention is shown.
  • flexible fastening tape refers to a flat or cylindrical element formed from a flexible material of small dimensions, which is used for fastening, tying or tying the openings of bags, plants, cables, etc. It is used by winding the wire around the object to be fastened or tied, and then twisting the ends.
  • water soluble material or “water soluble” refers to those materials that can be diluted in water, until forming a new substance (completely disintegrating from its original form).
  • the flexible fastening tape is made of “water soluble material” which dissolves on contact with water, so it can also be identified as “water soluble”.
  • polyvinyl alcohol As used herein, the term "polyvinyl alcohol”, “polyvinyl alcohol”, or “PVA” is an odorless, colorless (white) water-soluble synthetic polymer. With the formula (C2H4O) X ; density of 1.19 g/cm 3 ; melting point 200 °C; and boiling point of 228 °C.
  • the term "density” refers to a quantity referring to the amount of mass in a given volume of a solid substance or object.
  • these can be of low or high density and this is the use that can be given to them, either for the production of rigid or malleable materials, for extrusion or fusion processes, to withstand high or low temperatures, among others.
  • the advantages of the flexible, environmentally friendly fastening tape of the present invention are obtained from the material used in its production, that is, from a water-soluble material, which becomes especially relevant for the growing environmental awareness that consumers have acquired in recent years. It is clear that the prior art has only focused on producing flexible fastening tapes, which are neither biodegradable nor water soluble. Another great advantage of the present invention is that the work with the properties of the material makes it soluble only in water, therefore, the flexible fastening tape adequately resists the humidity and heat of the manipulation carried out by the user.
  • Another advantage is that when using PVA as a material for the formulation of the flexible fastening tape, it is quickly dissolved and eliminated, so when its useful life has expired, or the user no longer wants to use it, the flexible fastening tape can be disposed of quickly, unlike other prior art materials, with which flexible fastening tapes are manufactured that are neither biodegradable nor water-soluble, which can take years to completely degrade.
  • the density used in the PVA polymer, for the flexible fastening tape allows it to be resistant, safe and soluble in water, to make it friendly to the environment.
  • figures 1 to 8 show representations of the water-soluble flexible fastening tape that allow a better understanding of the object of the invention.
  • the present invention discloses a flexible, environmentally friendly fastening tape for tying bags or packaging of food products, which is comprised of a base body of flexible and moldable (or malleable) material, wherein the flexible material is comprised of a water-soluble polymeric material.
  • said water-soluble polymeric material is formed from polyvinyl alcohol resin, which may be mostly or completely polyvinyl alcohol.
  • the first embodiment of the present invention is shown, which corresponds to an isometric view, of a flexible fastening tape 10 of rectangular cross section.
  • the flexible fastening tape 10 comprises a base body elongated 20 having a first face 60 and a second face 70 (upper face and lower face respectively).
  • a front view of the flexible fastening tape 10 is shown.
  • FIG 3 in a second embodiment of the invention, an isometric view of a flexible fastening tape 110 is shown comprising a base body 120 of rectangular cross section and a filament 130 inserted along the longitudinal central section of the tape.
  • a front view of the flexible fastening strap 110 is shown in Figure 4.
  • FIG 5 in a third embodiment of the invention, an isometric view is shown, of a flexible fastening tape 210 comprising a base body 220 of rectangular cross section and two filaments 230a, 230b inserted longitudinally, each one, in the vicinity of each longitudinal edge 240, 250 of the tape.
  • a front view of the flexible fastening strap 210 is shown in Figure 6.
  • an isometric view of a flexible fastening tape 300 comprising a single elongated base body of circular cross section.
  • a front view of the flexible fastening tape 300 is shown in figure 8.
  • the base body is in the form of a continuous thread whose diameter varies between 0.5 and 5 millimeters.
  • the environmentally friendly flexible fastening tape described in the present invention has a rectangular base body. So then, the flexible fastening tape, in some of its modalities, will have a basal body that throughout its entire length will have a rectangular shape and a rectangular cross section. Said flexible fastening tape may be arranged in independent segments or continuously, and may vary between 10 and 15,000 millimeters, preferably between 10 and 5,000 millimeters. Likewise, the environmentally friendly flexible fastening tape can be supplied in separate units of the same length or continuously wound on a reel. As already mentioned, the environmentally friendly flexible fastening tape, whose base body is rectangular in shape, can include at least one filament inserted along the length of the tape, wherein said filament is made of a flexible polymeric material or a flexible metallic material.
  • the flexible polymeric material filament may be formed from polyvinyl alcohol resin or other water soluble polymer.
  • said filament is made of a flexible metallic material, obviously said filament will not be soluble in water, but, as the rest of the tape material will be water soluble, then, after the polymeric material disintegrates, the metallic filament will remain free in the water, being able to be easily recovered or extracted from the water for subsequent recycling.
  • the flexible fastening tape can be a thin sheet (which in enlarged view will have a rectangular cross section) or of a clearly identifiable greater thickness.
  • said description covers any cross section that presents curvatures, such as semicircular, oval, sinusoidal, etc.
  • the flexible fastening tape according to the invention can be applied to a shirred neck of a flexible package (eg a bag) by folding the flexible fastening tape around the neck and twisting its ends around each other.
  • a shirred neck of a flexible package eg a bag
  • Example 1 Formulation of the flexible fastening tape for tying bags or packaging of food products from polyvinyl alcohol resin.
  • the manufacture of water-soluble flexible fastening tape, for tying bags or food product packaging is manufactured based on techniques known in the art by melt extrusion or die-cutting, as indicated in patent applications US 2019/0152665 Al and US 2020/0024438 Al (which are incorporated herein by reference), using a PVA resin, capable of dissolving water.
  • PVA is traditionally made by polymerizing vinyl acetate and then hydrolyzing the polymer to an alcohol.
  • Eos polyvinyl alcohols vary in their degree of polymerization and their degree of hydrolysis.
  • the temperature at which the PVA dissolves can vary by altering the orientation of the polymer, changing its degree of hydrolysis and crystallization, which are techniques widely known and disclosed in the state of the art.
  • the flexible fastening tape For adequate strength of the flexible fastening tape, it is formulated with a PVA of sufficient density so that the fastening tape can resist pulling and twisting during use.
  • the flexible fastening tape When the flexible fastening tape includes PVA filaments, these will have a slightly higher density than the density of the rest of the fastening tape. In this case, as already mentioned, the fastening tape formed with PVA resin will have a lower density, being more elastic and flexible than PVA filaments. For its part, when the flexible fastening tape does not include any type of filaments, its density will be the same throughout its entire structure. As previously mentioned, the density with which the PVA is worked to form the fastening tape plays a relevant role, since it must work in a density range that varies between 1.1 and 1.55 g/cc, so that a resistant and flexible fastening tape is formed at the same time.
  • Example 2 Disintegration test of the sanitary kit. Scope: This test is a simple method, which consists of placing the flexible tape, without filaments, in a 2 liter beaker and determining the time it takes to dissolve. In addition, two conditions are tested: 1) with agitation, and 2) without agitation. This in order to determine how long it takes for the product to dissolve in stagnant water, as well as moving water, depending on where the product may end up, if it is inadvertently discarded into the environment.
  • Magnetic stirrer CORNING® brand
  • medium speed 700-800 rpm
  • magnetic bar iii
  • stopwatch iii
  • 2 L beakers Materials: i) Magnetic stirrer (CORNING® brand), at medium speed (700-800 rpm); ii) magnetic bar; iii) stopwatch; and iv) 2 L beakers.
  • Table 1 Results of the disintegration test in water of a 30 mm long fastening tape with a PVA density of 1.1 g/cc.
  • the tests guarantee and certify that the flexible fastening tape is completely soluble in water and in a short time, which differs from other flexible fastening tapes of the prior art, which are not water-soluble, so they can take years to disintegrate. Consequently, the previous examples and description of the invention support the invention in any of its forms, demonstrating that it presents a technical advantage over the prior art.
  • the material used is known in the prior art, complies with FDA standards and requirements, and is friendly to the environment, and finally, no one has anticipated a water-soluble flexible fastening tape that is made entirely of PVA.

Abstract

The present invention relates to an environmentally-friendly flexible fastening strip for tying food product bags or packaging, said strip comprising a base body made of flexible mouldable material, wherein the flexible material is comprised of a water-soluble polymer material formed from polyvinyl alcohol resin.

Description

CINTA DE SUJECIÓN FLEXIBLE SOLUBLE EN AGUA WATER SOLUBLE FLEXIBLE TAPE
CAMPO TÉCNICO DE LA INVENCION TECHNICAL FIELD OF THE INVENTION
La presente invención se enfoca al campo de los elementos de sujeción para el cierre de bolsas o empaques, en general, se refiere a un accesorio de ayuda para el cierre o amarre de bolsas. En particular, la presente invención se refiere a una cinta de sujeción flexible, ambientalmente amigable, para el amarre de bolsas o empaques de productos alimenticios, la cual es capaz de disolverse en pocos minutos al entrar en contacto con el agua y ser eliminada de forma amigable con el medioambiente, reduciendo las toneladas de plástico que se generan por concepto de desechos plásticos que se eliminan a la basura. La cinta de sujeción flexible, puede cumplir la función de cerrar un lado de acceso de un empaque flexible, la cual al momento de su uso estrangula el cuello de la bolsa de empaque y sus extremos se tuercen juntos para lograr la fijación o sello de los elementos envasados. The present invention focuses on the field of fastening elements for closing bags or packages, in general, it refers to an aid accessory for closing or tying bags. In particular, the present invention refers to a flexible, environmentally friendly fastening tape for tying bags or packaging of food products, which is capable of dissolving in a few minutes upon contact with water and being disposed of in an environmentally friendly way, reducing the tons of plastic generated by way of plastic waste that is disposed of in the trash. The flexible fastening tape can fulfill the function of closing one access side of a flexible packaging, which at the time of its use strangles the neck of the packaging bag and its ends are twisted together to achieve the fixation or seal of the packaged elements.
ANTECEDENTES DE LA INVENCION BACKGROUND OF THE INVENTION
Las cintas de sujeción flexible se utilizan para diversos fines de sujeción y cierre. Típicamente, las cintas de sujeción flexible se usan para sellar un paquete que tiene un extremo abierto, como una bolsa. Para sellar el paquete, se junta el material de empaque adyacente al extremo abierto. Las cintas de sujeción flexible se extienden alrededor del material de embalaje recogido hasta que las partes extremas de la cinta de sujeción flexible queden adyacentes entre sí. A continuación, las partes extremas se retuercen con respecto al resto de la cinta de sujeción flexible para sujetar la cinta de sujeción flexible al paquete. Flexible fastening tapes are used for a variety of fastening and closure purposes. Typically, flexible straps are used to seal a package that has an open end, such as a bag. To seal the package, the packaging material adjacent to the open end is brought together. The flexible straps are extended around the collected packaging material until the end portions of the flexible strap are adjacent to each other. The end portions are then twisted relative to the rest of the flexible fastening tape to fasten the flexible fastening tape to the package.
Las cintas de sujeción flexible pueden incluir un filamento metálico flexible que está encerrado en un material plástico. Las cintas de sujeción flexible tienen muchas propiedades ventajosas que han llevado a un uso generalizado de ellas, por ejemplo, las cintas de sujeción flexible se aplican fácilmente mediante operaciones manuales o mecánicas de alta velocidad. Además, los múltiples ciclos de sujeción y desconexión a los que se someten los elementos de sujeción flexibles, no afectan significativamente su capacidad de sujeción. Hay muchas aplicaciones de envasado de alimentos en las que las cintas de sujeción flexible juegan un papel importante, ya que dichas cintas de sujeción permiten a los consumidores acceder rápidamente y volver a sellar un envase de producto en varias ocasiones. Una desventaja de las cintas de sujeción flexible existentes actualmente, es que los consumidores, después de su uso, las desechan y pasan a ser parte de las toneladas de desperdicios plásticos que se generan en el mundo. Para superar esta dificultad, en la presente invención se ha desarrollado una cinta de sujeción flexible, ambientalmente amigable, para el amarre de bolsas o empaques de todo tipo de productos, particularmente productos alimenticios. Flexible fastening tapes may include a flexible metal filament that is encased in a plastic material. Flexible fastening tapes have many advantageous properties which have led to their widespread use, for example, flexible fastening tapes are easily applied by high speed manual or mechanical operations. In addition, the multiple clamping and disconnecting cycles that flexible fasteners are subjected to do not significantly affect their clamping ability. There are many food packaging applications where flexible clamping tapes play an important role, as flexible clamping tapes allow consumers to quickly access and reseal a product package multiple times. A disadvantage of the currently existing flexible fastening tapes is that consumers, after use, discard them and become part of the tons of plastic waste that is generated in the world. To overcome this difficulty, in the present invention a flexible, environmentally friendly fastening tape has been developed for tying bags or packages of all kinds of products, particularly food products.
A través del tiempo, se han desarrollado numerosos intentos de disponer de una atadura de torsión polimérica que exhiba características deseables de tenacidad y flexibilidad mientras que también se puede sujetar y desabrochar fácilmente durante numerosos ciclos. A este respecto, se hace referencia a Kirkpatrick, quien en la patente de invención US 3.565.738 divulga un material aglutinante polimérico en forma de tiras de plástico semirrígido con un alto módulo de tracción y buenas propiedades de plegado similares a las de un alambre. Over time, numerous attempts have been made to provide a polymeric twist tie that exhibits desirable characteristics of toughness and flexibility while also being easily fastened and unfastened through numerous cycles. In this regard, reference is made to Kirkpatrick, who in US patent 3,565,738 discloses a polymeric binder material in the form of semi-rigid plastic strips with a high tensile modulus and good wire-like bending properties.
Por otra parte el documento DE 7615537 U da a conocer un cierre tipo clipband, que comprende una tira de material plástico que tiene alambres de refuerzo incrustados a lo largo de los bordes longitudinales y que está provisto de una nervadura longitudinal en el lado del cierre, aproximadamente en el centro del cuerpo central, entre los bordes longitudinales reforzados. Se afirma que esta nervadura longitudinal aumenta el agarre del cierre y la estabilidad del cierre. On the other hand, the document DE 7615537 U discloses a clipband-type closure, which comprises a strip of plastic material that has reinforcing wires embedded along the longitudinal edges and that is provided with a longitudinal rib on the side of the closure, approximately in the center of the central body, between the longitudinal reinforced edges. This longitudinal rib is said to increase the grip of the closure and the stability of the closure.
En otros ejemplos del estado de la técnica, se tiene a Thomas, patente de invención US 3.535.746; Moon, patente de invención US 3.604.066; y Hoard, patente de invención US 3.945.086, en donde se describen dispositivos de cierre poliméricos. Sin embargo, ninguno de estos dispositivos de cierre polimérico, son ambientalmente amigables y, además, no son adecuados para aplicación de ataduras en maquinarias de envasado mecánico a alta velocidad. En la actualidad, los cierres de sujeción flexible son los más utilizados para sujetar las bolsas de alimentos, cables en embalaje de artículos electrónicos entre otros usos. Las cintas de sujeción flexible se pueden presentar en varios colores, tamaños, impresiones, diseños y materiales. La resistencia de las cintas de sujeción flexible también varía en función de su uso. Aunque las cintas de sujeción flexible son muy importantes para el embalaje, en la actualidad tienen un impacto negativo en el medio ambiente. Other examples of the state of the art include Thomas, US patent 3,535,746; Moon, US Patent 3,604,066; and Hoard, US Patent 3,945,086, where polymeric closure devices are described. However, none of these polymeric closure devices are environmentally friendly and, furthermore, are not suitable for tying application in high-speed mechanical packaging machinery. Currently, flexible fastening closures are the most used to fasten food bags, cables in the packaging of electronic items, among other uses. Flexible fastening tapes can come in various colors, sizes, prints, designs, and materials. The resistance of flexible fastening tapes also varies depending on its use. Although flexible fastening tapes are very important for packaging, they currently have a negative impact on the environment.
Las cintas de sujeción flexible son muy utilizadas hoy en día; muchos productos alimenticios envasados, como por ejemplo verduras y pan, se sujetan y atan con cintas de sujeción flexible. Las cintas de sujeción flexibles también son utilizadas para la sujeción de elementos domésticos, como son, cintas flexibles para la sujeción de plantas o cables en el interior o exterior del hogar. Sería muy difícil prescindir de ellas en un futuro próximo. Sin embargo, con la abundancia de cintas de sujeción flexible en producción y uso, hay un problema de eliminación. Una buena forma de disminuir el impacto ambiental de un producto es reciclar dicho producto, de esta manera, entra al circuito productivo y forma parte de la economía circular, sin embargo, en el caso de las cintas de sujeción flexibles, dado su pequeño tamaño, no es factible su recuperación o recolección. Flexible fastening tapes are widely used today; Many packaged food products, such as vegetables and bread, are held and tied with flexible strapping. Flexible fastening tapes are also used to fasten household items, such as flexible tapes for fastening plants or cables inside or outside the home. It would be very difficult to do without them in the near future. However, with the abundance of flexible fastening tapes in production and use, there is a disposal problem. A good way to reduce the environmental impact of a product is to recycle said product, in this way, it enters the production circuit and forms part of the circular economy, however, in the case of flexible fastening tapes, given their small size, their recovery or collection is not feasible.
Las cintas de sujeción actuales, están conformadas totalmente por un material polimérico flexible con una resistencia mecánica suficiente para soportar pequeños esfuerzos de tracción. También se encuentran cintas de sujeción conformadas por un material de recubrimiento, que es, por lo general de material plástico (polietileno) o papel (liso o metálico), este material puede recubrir alambres metálicos que pueden ser de acero galvanizado o inoxidable y miden entre 0,410 y 0,0132 de diámetro. Current fastening tapes are made entirely of a flexible polymeric material with sufficient mechanical resistance to withstand small tensile stresses. There are also fastening tapes made of a covering material, which is generally made of plastic (polyethylene) or paper (smooth or metallic), this material can cover metal wires that can be made of galvanized or stainless steel and measure between 0.410 and 0.0132 in diameter.
El material que forma las cintas de sujeción puede diseñarse en varios colores con o sin impresión. Si se observan todos los componentes individuales que forman las cintas de sujeción flexible, se puede ver por qué es muy difícil reciclarlas. Cada componente es tan pequeño que no puede ser reciclado en un nuevo producto. Por lo tanto, todas las cintas de sujeción flexible usadas acaban, tristemente, en los vertederos. The material that forms the fastening tapes can be designed in various colors with or without printing. If you look at all the individual components that make up flexible fastening tapes, you can see why it's so difficult to recycle them. Each component is so small that it cannot be recycled into a new product. Therefore, all used flexible fastening tapes sadly end up in landfills.
Muchos de los productos que se consideran respetuosos con el medio ambiente son biodegradable s; las bacterias y otros microorganismos pueden descomponerlos en partes más pequeñas, sin que los productos causen ningún daño al medio ambiente. Se sabe que las cintas de sujeción flexible no son reciclables, pero ¿son biodegradables? Hasta el momento, sólo las cintas de sujeción flexible de papel se podrían considerar biodegradables. Aunque los alambres o filamentos metálicos de las cintas de sujeción flexible no son biodegradables. (Fuente:
Figure imgf000005_0001
Figure imgf000005_0002
Many of the products that are considered environmentally friendly are biodegradable; bacteria and other microorganisms can break them down into smaller parts, without the products causing any harm to the environment. Flexible fastening tapes are known to be non-recyclable, but are they biodegradable? Until now, only flexible paper fastening tapes could be considered biodegradable. Although the metal wires or filaments of the flexible fastening tapes are not biodegradable. (Fountain:
Figure imgf000005_0001
Figure imgf000005_0002
Actualmente no se conocen estudios relacionados con la cantidad cintas de sujeción flexibles que se producen y tampoco el impacto que podría tener en el medio ambiente el hecho de que las cintas de sujeción flexible, no sean reciclables y que, en el mejor de los casos, se pueda optar a la reutilización de estas para evitar el impacto que pueda tener desecharlas como basura. Sin embargo, CiperChile (Centro de investigación periodística), en un artículo publicado en marzo de 2021 (Fuente:
Figure imgf000005_0003
Figure imgf000005_0004
hace referencia a un informe publicado por la ONU, enfocándose principalmente en lo que se refiere al plástico. Según este estudio, los consumidores deben aprender a disminuir el uso de plásticos de un solo uso y exigir la reducción de uso del plástico en envases y embalajes, siendo la prioridad reemplazar los materiales plásticos por materias primas mas amigables con el medio ambiente. Es decir, que se degraden más rápido, que puedan tener aplicaciones alternativas en otros usos y que eliminen el uso de productos químicos tóxicos en su diseño y fabricación. Currently, there are no known studies related to the amount of flexible fastening tapes that are produced, nor the impact that the fact that flexible fastening tapes are not recyclable could have on the environment and that, in the best of cases, it is possible to reuse them to avoid the impact that disposing of them as garbage may have. However, CiperChile (Journalistic Investigation Center), in an article published in March 2021 (Source:
Figure imgf000005_0003
Figure imgf000005_0004
refers to a report published by the UN, focusing mainly on what refers to plastic. According to this study, consumers should learn to reduce the use of single-use plastics and demand a reduction in the use of plastic in containers and packaging, with the priority being to replace plastic materials with more environmentally friendly raw materials. In other words, they degrade faster, they can have alternative applications in other uses and they eliminate the use of toxic chemical products in their design and manufacture.
“La actual contaminación con plástico, que preocupa a un grupo de científicos chilenos (Urbina et al, 2020), por la creciente evidencia también en nuestro país de la presencia de plásticos, micro y nanoplásticos en el medio ambiente y seres vivos, nos debe hacer pensar en un cambio de paradigma en nuestro sistema de producción y consumo que debiera pensar y actuar en forma menos lineal y más circular. La presencia de plásticos en los tejidos de plantas, animales y personas, es una amenaza directa a nuestra salud, pues como indicamos, los plásticos no vienen solos, sino son también vectores de otros contaminantes altamente tóxicos para la naturaleza y el ser humano, y al ser de tan larga vida (persistente en el ambiente), no solo amenaza a nuestra generación sino también a las generaciones futuras ”. En consecuencia, las cintas de sujeción flexibles, son conocidas en el estado de la técnica actual, pero, su desuso y acumulación, las transforma en desechos altamente peijudiciales para el medio ambiente, por tanto, es necesario disponer de cintas de sujeción flexibles, elaboradas a partir de materiales ambientalmente amigables. Es efectivo que materiales ambientalmente amigables son conocidos y utilizados en el estado de la técnica para la fabricación de diversos elementos de plástico, pero, sus aplicaciones se han enfocado más en elementos compostables, o de degradación natural, o los que son fabricados a partir de elementos reciclados. Sin embargo, el estado de la técnica no se ha enfocado en formar una cinta de sujeción flexible soluble en agua (hidrosoluble) que pueda ser prescindida fácilmente y en un breve periodo de tiempo, al contrario de las actuales cintas de sujeción flexibles que se degradan en largos periodos de tiempo (años) cuando son desechadas. “The current contamination with plastic, which worries a group of Chilean scientists (Urbina et al, 2020), due to the growing evidence also in our country of the presence of plastics, micro and nanoplastics in the environment and living beings, should make us think of a paradigm shift in our production and consumption system that should think and act in a less linear and more circular way. The presence of plastics in the tissues of plants, animals and people is a direct threat to our health, because as we indicated, plastics do not come alone, but are also vectors of other pollutants that are highly toxic to nature and humans, and since they are so long-lived (persistent in the environment), they not only threaten our generation but also future generations”. Consequently, flexible fastening tapes are known in the current state of the art, but their disuse and accumulation transform them into highly harmful waste for the environment, therefore, it is necessary to have flexible fastening tapes, made from environmentally friendly materials. It is effective that environmentally friendly materials are known and used in the state of the art for the manufacture of various plastic elements, but their applications have focused more on compostable elements, or natural degradation, or those that are manufactured from recycled elements. However, the state of the art has not focused on forming a water-soluble (water-soluble) flexible fastening tape that can be dispensed with easily and in a short period of time, contrary to current flexible fastening tapes that degrade over long periods of time (years) when discarded.
Por tanto, existe la necesidad de cintas de sujeción flexibles, ambientalmente amigable, para el amarre de bolsas o empaques de productos alimenticios, las que se degraden rápidamente, y que no tengan que ir a rellenos sanitarios o al mar. Therefore, there is a need for flexible, environmentally friendly fastening tapes for tying bags or packaging of food products, which degrade quickly, and do not have to go to landfills or the sea.
RESUMEN DE LA INVENCIÓN SUMMARY OF THE INVENTION
Un objetivo del presente invento, es proporcionar una cinta de sujeción flexible para el amarre de bolsas o empaques de productos alimenticio, donde dicha cinta sea hidrosoluble en su totalidad, con materiales amigables con el medio ambiente, para reducir la contaminación producida por el creciente uso de materiales plásticos comunes en artículos usados en la vida cotidiana. One objective of the present invention is to provide a flexible fastening tape for tying bags or packaging of food products, where said tape is entirely water-soluble, with environmentally friendly materials, to reduce pollution caused by the increasing use of common plastic materials in articles used in daily life.
Anteriormente, los inventores habían diseñado bolsas hidrosolubles plásticas y de tela no tejida, formando la empresa Solubag. En sus estudios, llegaron a una fórmula química a base de alcohol polivinílico (PVA) (un material hidrosoluble) al que le sumaron otros materiales de origen natural, generando así bolsas y materiales que se disuelven en contacto con el agua, evitando la contaminación de los océanos. (Fuente:
Figure imgf000006_0001
En base a lo anterior, los inventores enfocaron sus esfuerzos e investigación para desarrollar una cinta de sujeción flexible que fuese de rápida disolución y, de esta manera, solucionar el problema de contaminación por concepto de cintas en desuso y su eliminación a la basura cuando estas ya no son útil, lo cual a la fecha no ha sido anticipado por el estado de la técnica previa. Previously, the inventors had designed non-woven fabric and plastic water-soluble bags, forming the Solubag company. In their studies, they arrived at a chemical formula based on polyvinyl alcohol (PVA) (a water-soluble material) to which they added other materials of natural origin, thus generating bags and materials that dissolve in contact with water, avoiding pollution of the oceans. (Fountain:
Figure imgf000006_0001
Based on the foregoing, the inventors focused their efforts and research to develop a flexible fastening tape that was quickly dissolved and, in this way, solve the problem of contamination due to obsolete tapes and their disposal when they are no longer useful, which to date has not been anticipated by the prior state of the art.
En consecuencia, la presente invención soluciona este problema, en base a una cinta de sujeción flexible, ambientalmente amigable, para el amarre de bolsas o empaques de productos alimenticio, que comprende un cuerpo base de material flexible y moldeable (o maleable) formado a partir de un material polimérico soluble en agua como es la resina de polivinil alcohol y que puede incluir al menos un filamento insertado a lo largo de la cinta, siendo, principalmente, el filamento de un material polimérico flexible, aunque no se descarta una material metálico flexible. Consequently, the present invention solves this problem, based on a flexible, environmentally friendly fastening tape for tying bags or food product packaging, which comprises a base body of flexible and moldable (or malleable) material formed from a water-soluble polymeric material such as polyvinyl alcohol resin and which can include at least one filament inserted along the length of the tape, the filament being mainly a flexible polymeric material, although a flexible metallic material is not ruled out.
BREVE DESCRIPCIÓN DE LA FIGURAS BRIEF DESCRIPTION OF THE FIGURES
Una descripción detallada de la invención, se llevará a cabo en conjunto con las figuras que forman parte de esta solicitud. A detailed description of the invention will be carried out in conjunction with the figures that are part of this application.
Es importante indicar que las figuras sólo actúan como elementos de apoyo para una mejor comprensión de la invención, sin que ellas representen los componentes a una escala real o proporcional. La invención tampoco puede verse limitada sólo a lo que aparece en las figuras, pues ellas representan, en una forma pedagógica, los elementos trascendentes de la cinta de sujeción flexible y pueden no incluirse elementos que son de conocimiento general en el estado de la técnica. Así entonces, se tienen las siguientes figuras: It is important to indicate that the figures only act as support elements for a better understanding of the invention, without representing the components on a real or proportional scale. Neither can the invention be limited only to what appears in the figures, since they represent, in a pedagogical way, the transcendental elements of the flexible fastening tape and elements that are generally known in the state of the art may not be included. Thus, we have the following figures:
Figura 1: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista isométrica, de una cinta de sujeción flexible de acuerdo a una primera modalidad de la presente invención. Figura 2: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista frontal de la cinta de sujeción flexible de acuerdo a la primera modalidad de la presente invención. Figure 1: Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a first embodiment of the present invention. Figure 2: Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the first embodiment of the present invention is shown.
Figura 3: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista isométrica, de una cinta de sujeción flexible de acuerdo a una segunda modalidad de la presente invención, que incluye un filamento insertado. Figure 3: Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a second embodiment of the present invention, which includes an inserted filament.
Figura 4: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista frontal de la cinta de sujeción flexible de acuerdo a la segunda modalidad de la presente invención. Figure 4: Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the second embodiment of the present invention is shown.
Figura 5: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista isométrica, de una cinta de sujeción flexible de acuerdo a una tercera modalidad de la presente invención, que incluye dos filamentos insertados. Figure 5: Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a third embodiment of the present invention, which includes two inserted filaments.
Figura 6: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista frontal de la cinta de sujeción flexible de acuerdo a la tercera modalidad de la presente invención. Figure 6: Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the third embodiment of the present invention is shown.
Figura 7: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista isométrica, de una cinta de sujeción flexible de acuerdo a una cuarta modalidad de la presente invención, que tiene forma de un hilo continuo. Figure 7: Schematic representation of a flexible fastening tape. An isometric view is shown, of a flexible fastening tape according to a fourth embodiment of the present invention, which is in the form of a continuous thread.
Figura 8: Representación esquemática de una cinta de sujeción flexible. Se muestra una vista frontal de la cinta de sujeción flexible de acuerdo a la cuarta modalidad de la presente invención. Figure 8: Schematic representation of a flexible fastening tape. A front view of the flexible fastening tape according to the fourth embodiment of the present invention is shown.
DESCRIPCIÓN DETALLADA DE LA INVENCIÓN DETAILED DESCRIPTION OF THE INVENTION
Para una mejor comprensión del presente invento, es necesario entregar las siguientes definiciones, las que sólo deben ser entendidas como elementos que ayudan al entendimiento de las características técnicas particulares en este campo técnico. Como se utiliza en el presente invento, el término "cinta de sujeción flexible” se refiere a un elemento plano o cilindrico formado a partir de un material flexible de pequeñas dimensiones, el que se utiliza para la sujeción, amarre o atadura de las aberturas de bolsas, plantas, cables, etc. Se utiliza enrollando el alambre alrededor del objeto que se va a sujetar o atar, y luego se retuercen los extremos. For a better understanding of the present invention, it is necessary to provide the following definitions, which should only be understood as elements that help to understand the particular technical characteristics in this technical field. As used in the present invention, the term "flexible fastening tape" refers to a flat or cylindrical element formed from a flexible material of small dimensions, which is used for fastening, tying or tying the openings of bags, plants, cables, etc. It is used by winding the wire around the object to be fastened or tied, and then twisting the ends.
Como se utiliza en el presente invento, el término "material soluble en agua” o "hidrosoluble" se refiere a aquellos materiales que pueden diluirse en agua, hasta formar una sustancia nueva (desintegrándose completamente desde su forma original). En esta invención, la cinta de sujeción flexible esta hecha a base de “material hidrosoluble” el cual se disuelve al contacto con el agua, por lo que también puede ser identificado como "hidrosoluble" . As used in the present invention, the term "water soluble material" or "water soluble" refers to those materials that can be diluted in water, until forming a new substance (completely disintegrating from its original form). In this invention, the flexible fastening tape is made of "water soluble material" which dissolves on contact with water, so it can also be identified as "water soluble".
Como se utiliza en el presente invento, el término "alcohol polivinílico” , "polivinil alcohol”, o “PVA” es un polímero sintético soluble en agua, incoloro (blanco) e inodoro. Con la fórmula (C2H4O)X; densidad de 1,19 g/cm3; punto de fusión de 200 °C; y punto de ebullición de 228 °C. As used herein, the term "polyvinyl alcohol", "polyvinyl alcohol", or "PVA" is an odorless, colorless (white) water-soluble synthetic polymer. With the formula (C2H4O) X ; density of 1.19 g/cm 3 ; melting point 200 °C; and boiling point of 228 °C.
Como se utiliza en el presente invento, el término “densidad” se refiere a una magnitud referida a la cantidad de masa en un determinado volumen de una sustancia o un objeto sólido. En el caso de los polímeros, estos pueden ser de baja o alta densidad y en esto radica el uso que se les puede dar, ya sea para la producción de materiales rígidos o maleables, para procesos de extrusión o fusión, para soportar altas o bajas temperaturas, entre otros. As used in the present invention, the term "density" refers to a quantity referring to the amount of mass in a given volume of a solid substance or object. In the case of polymers, these can be of low or high density and this is the use that can be given to them, either for the production of rigid or malleable materials, for extrusion or fusion processes, to withstand high or low temperatures, among others.
Las ventajas de la cinta de sujeción flexible, amigable con el medio ambiente, de la presente invención, se obtienen a partir del material que se utiliza en su producción, es decir, a partir de un material hidrosoluble, el cual se hace especialmente relevante para la creciente conciencia medioambiental que han adquirido los consumidores en los últimos años. Está claro que el arte previo, sólo se ha enfocado en producir cintas de sujeción flexible, las cuales no son biodegradable ni tampoco hidrosolubles. Otra gran ventaja de la presente invención, es que el trabajo con las propiedades del material, lo hacen soluble solo en agua, por lo que, la cinta de sujeción flexible resiste adecuadamente la humedad y calor de la manipulación que realiza el usuario. The advantages of the flexible, environmentally friendly fastening tape of the present invention are obtained from the material used in its production, that is, from a water-soluble material, which becomes especially relevant for the growing environmental awareness that consumers have acquired in recent years. It is clear that the prior art has only focused on producing flexible fastening tapes, which are neither biodegradable nor water soluble. Another great advantage of the present invention is that the work with the properties of the material makes it soluble only in water, therefore, the flexible fastening tape adequately resists the humidity and heat of the manipulation carried out by the user.
Otra de las ventajas, es que al utilizar PVA como material para la formulación de la cinta de sujeción flexible, éste es de rápida disolución y eliminación, por lo que cuando cumplió su vida útil, o el usuario no quiere seguir usándola, se puede deshacer de la cinta de sujeción flexible rápidamente, a diferencia de otros materiales del arte previo, con los que se fabrican cintas de sujeción flexibles que no son biodegradables ni hidrosolubles, por lo cual pueden tardar años en degradarse por completo. Another advantage is that when using PVA as a material for the formulation of the flexible fastening tape, it is quickly dissolved and eliminated, so when its useful life has expired, or the user no longer wants to use it, the flexible fastening tape can be disposed of quickly, unlike other prior art materials, with which flexible fastening tapes are manufactured that are neither biodegradable nor water-soluble, which can take years to completely degrade.
Finalmente, la densidad utilizada en el polímero de PVA, para la cinta de sujeción flexible, permite que sea resistente, seguro y soluble en agua, para hacerlo amigable con el medioambiente. Finally, the density used in the PVA polymer, for the flexible fastening tape, allows it to be resistant, safe and soluble in water, to make it friendly to the environment.
Así entonces, a través del presente invento, se ha desarrollado un avance técnico en la producción de una cinta de sujeción flexible, hidrosoluble en su totalidad, de buena calidad, resistente, a bajo costo y sustentable con el medio ambiente, la que se degrada en agua fría. Para una mejor compresión del presente invento, en las figuras 1 a 8, se muestran representaciones de la cinta de sujeción flexible hidrosoluble que permiten comprender de mejor manera el objeto de la invención. Thus, through the present invention, a technical advance has been developed in the production of a flexible, fully water-soluble, good quality, resistant, low-cost and environmentally sustainable fastening tape, which degrades in cold water. For a better understanding of the present invention, figures 1 to 8 show representations of the water-soluble flexible fastening tape that allow a better understanding of the object of the invention.
Así entonces, la presente invención divulga una cinta de sujeción flexible, ambientalmente amigable, para el amarre de bolsas o empaques de productos alimenticios, la que está comprendida por un cuerpo base de material flexible y moldeable (o maleable) en donde el material flexible está comprendido por un material polimérico soluble en agua. En donde, dicho material polimérico soluble en agua está formado a partir de resina polivinil alcohol, pudiendo ser la mayor parte o completamente polivinil alcohol. Thus, the present invention discloses a flexible, environmentally friendly fastening tape for tying bags or packaging of food products, which is comprised of a base body of flexible and moldable (or malleable) material, wherein the flexible material is comprised of a water-soluble polymeric material. Wherein, said water-soluble polymeric material is formed from polyvinyl alcohol resin, which may be mostly or completely polyvinyl alcohol.
En la figura 1, se muestra la primera realización de la presente invención, la que corresponde a una vista isométrica, de una cinta de sujeción flexible 10 de sección transversal rectangular. La cinta de sujeción flexible 10 comprende, un cuerpo base alargado 20 que tiene una primera cara 60 y una segunda cara 70 (cara superior y cara inferior respectivamente). En la figura 2 se muestra una vista frontal de la cinta de sujeción flexible 10. In Figure 1, the first embodiment of the present invention is shown, which corresponds to an isometric view, of a flexible fastening tape 10 of rectangular cross section. The flexible fastening tape 10 comprises a base body elongated 20 having a first face 60 and a second face 70 (upper face and lower face respectively). In figure 2 a front view of the flexible fastening tape 10 is shown.
En la figura 3, en una segunda realización de la invención, se muestra una vista isométrica de una cinta de sujeción flexible 110 que comprende un cuerpo base 120 de sección transversal rectangular y un filamento 130 insertado a lo largo de la sección central longitudinal de la cinta. En la figura 4 se muestra una vista frontal de la cinta de sujeción flexible 110. In Figure 3, in a second embodiment of the invention, an isometric view of a flexible fastening tape 110 is shown comprising a base body 120 of rectangular cross section and a filament 130 inserted along the longitudinal central section of the tape. A front view of the flexible fastening strap 110 is shown in Figure 4.
En la figura 5, en una tercera realización de la invención, se muestra una vista isométrica, de una cinta de sujeción flexible 210 que comprende un cuerpo base 220 de sección transversal rectangular y dos filamentos 230a, 230b insertados longitudinalmente, cada uno, en la proximidad de cada borde longitudinal 240, 250 de la cinta. En la figura 6 se muestra una vista frontal de la cinta de sujeción flexible 210. In figure 5, in a third embodiment of the invention, an isometric view is shown, of a flexible fastening tape 210 comprising a base body 220 of rectangular cross section and two filaments 230a, 230b inserted longitudinally, each one, in the vicinity of each longitudinal edge 240, 250 of the tape. A front view of the flexible fastening strap 210 is shown in Figure 6.
En la figura 7, en una cuarta realización de la invención, se muestra una vista isométrica de una cinta de sujeción flexible 300, que comprende un único cuerpo base alargado de sección transversal circular. En la figura 8 se muestra una vista frontal de la cinta de sujeción flexible 300. En este caso, el cuerpo base tiene forma de un hilo continuo cuyo diámetro varía entre 0,5 y 5 milímetros. In figure 7, in a fourth embodiment of the invention, an isometric view of a flexible fastening tape 300 is shown, comprising a single elongated base body of circular cross section. A front view of the flexible fastening tape 300 is shown in figure 8. In this case, the base body is in the form of a continuous thread whose diameter varies between 0.5 and 5 millimeters.
La cinta de sujeción flexible ambientalmente amigable que se describe en la presente invención, tiene el cuerpo base de forma rectangular. Así entonces, la cinta de sujeción flexible, en algunas de sus modalidades, poseerá un cuerpo basal que a lo largo de toda su longitud tendrá una forma rectangular y una sección transversal rectangular. Dicha cinta de sujeción flexible, podrá disponerse en segmentos independientes o de forma continua, pudiendo variar entre 10 y 15.000 milímetros, preferentemente entre 10 y 5.000 milímetros. Así también, la cinta de sujeción flexible ambientalmente amigable, se podrá suministrar en unidades separadas de una misma longitud o en forma continua enrollada sobre un carrete. Como ya se ha mencionado, la cinta de sujeción flexible ambientalmente amigable, cuyo cuerpo base es de forma rectangular, puede incluir al menos un filamento insertado a lo largo de la cinta, en donde dicho filamento es de un material polimérico flexible o de un material metálico flexible. El filamento de material polimérico flexible puede estar formado a partir de resina de polivinil alcohol o de otro polímero soluble en agua. En el caso de que dicho filamento sea de un material metálico flexible, obviamente dicho filamento no será soluble en agua, pero, como el resto del material de la cinta sí será hidrosoluble, entonces, después que se desintegre el material polimérico, quedará el filamento metálico libre en el agua, pudiendo recuperarse o extraerse sin dificultad desde el agua para su posterior reciclaje. The environmentally friendly flexible fastening tape described in the present invention has a rectangular base body. So then, the flexible fastening tape, in some of its modalities, will have a basal body that throughout its entire length will have a rectangular shape and a rectangular cross section. Said flexible fastening tape may be arranged in independent segments or continuously, and may vary between 10 and 15,000 millimeters, preferably between 10 and 5,000 millimeters. Likewise, the environmentally friendly flexible fastening tape can be supplied in separate units of the same length or continuously wound on a reel. As already mentioned, the environmentally friendly flexible fastening tape, whose base body is rectangular in shape, can include at least one filament inserted along the length of the tape, wherein said filament is made of a flexible polymeric material or a flexible metallic material. The flexible polymeric material filament may be formed from polyvinyl alcohol resin or other water soluble polymer. In the event that said filament is made of a flexible metallic material, obviously said filament will not be soluble in water, but, as the rest of the tape material will be water soluble, then, after the polymeric material disintegrates, the metallic filament will remain free in the water, being able to be easily recovered or extracted from the water for subsequent recycling.
Se debe entender que cuando la invención se refiere a una sección transversal rectangular, dicha descripción abarca espesores micrométricos o milimétricos, por lo que en algunos casos, la cinta de sujeción flexible, puede ser una fina lámina (que en vista aumentada tendrá sección transversal rectangular) o de un espesor mayor claramente identificable. Asimismo, cuando la invención se refiere a una sección transversal circular, dicha descripción abarca toda sección transversal que presente curvaturas, como por ejemplo, semicircular, oval, sinusoidal, etc. It should be understood that when the invention refers to a rectangular cross section, said description covers micrometric or millimeter thicknesses, therefore, in some cases, the flexible fastening tape can be a thin sheet (which in enlarged view will have a rectangular cross section) or of a clearly identifiable greater thickness. Likewise, when the invention refers to a circular cross section, said description covers any cross section that presents curvatures, such as semicircular, oval, sinusoidal, etc.
La cinta de sujeción flexible según la invención, se puede aplicar a un cuello fruncido de un envase flexible (por ejemplo una bolsa) doblando la cinta de sujeción flexible alrededor del cuello y girando sus extremos, uno alrededor del otro. The flexible fastening tape according to the invention can be applied to a shirred neck of a flexible package (eg a bag) by folding the flexible fastening tape around the neck and twisting its ends around each other.
EJEMPLOS EXAMPLES
La descripción de las pruebas de rigor para demostrar la efectividad de una cinta de sujeción flexible, para el amarre de bolsas o empaques de productos alimenticios, siendo dicha cinta de sujeción flexible soluble en agua y ambientalmente amigable, se demuestra a través de los siguientes ejemplos comparativos. The description of the rigorous tests to demonstrate the effectiveness of a flexible fastening tape, for tying bags or packaging of food products, said flexible fastening tape being water soluble and environmentally friendly, is demonstrated through the following comparative examples.
Ejemplo 1: Formulación de la cinta de sujeción flexible para amarre del bolsas o empaque de productos alimenticios a partir de resina de polivinil alcohol. La fabricación de la cinta de sujeción flexible hidrosoluble, para amarre del bolsas o empaques de productos alimenticios, se fabrican en base a técnicas conocidas en el arte mediante extrusión en fusión o troquelado, tal como se indica en las solicitudes de patentes US 2019/0152665 Al y US 2020/0024438 Al (las cuales se incorporan aquí como referencia), utilizando una resina de PVA, capaz de disolverse agua. Example 1: Formulation of the flexible fastening tape for tying bags or packaging of food products from polyvinyl alcohol resin. The manufacture of water-soluble flexible fastening tape, for tying bags or food product packaging, is manufactured based on techniques known in the art by melt extrusion or die-cutting, as indicated in patent applications US 2019/0152665 Al and US 2020/0024438 Al (which are incorporated herein by reference), using a PVA resin, capable of dissolving water.
El PVA está fabricado, tradicionalmente, mediante la polimerización de acetato de vinilo y luego hidrolizar el polímero a un alcohol. Eos alcoholes polivinílicos varían en su grado de polimerización y su grado de hidrólisis. La temperatura a la que se disuelve el PVA puede variar por medio de la alteración de la orientación del polímero, cambiando su grado de hidrólisis y la cristalización, las cuales son técnicas ampliamente conocidas y divulgadas en el estado de la técnica. PVA is traditionally made by polymerizing vinyl acetate and then hydrolyzing the polymer to an alcohol. Eos polyvinyl alcohols vary in their degree of polymerization and their degree of hydrolysis. The temperature at which the PVA dissolves can vary by altering the orientation of the polymer, changing its degree of hydrolysis and crystallization, which are techniques widely known and disclosed in the state of the art.
En la presente invención se logró generar una cinta de sujeción flexible de PVA que se disuelve en agua, con el fin de asegurarse que se disuelva con agua corriente, como agua potable o agua de otra fuente. In the present invention it was possible to generate a flexible PVA fastening tape that dissolves in water, in order to ensure that it dissolves with running water, such as drinking water or water from another source.
Para una adecuada resistencia de la cinta de sujeción flexible, ésta se formula con un PVA de densidad suficiente para que la cinta de sujeción pueda resistir la tracción y torsión durante su uso. For adequate strength of the flexible fastening tape, it is formulated with a PVA of sufficient density so that the fastening tape can resist pulling and twisting during use.
Cuando la cinta de sujeción flexible incluye filamentos de PVA, éstos tendrán una densidad levemente mayor que la densidad del resto de la cinta de sujeción. En este caso, como ya se dijo, la cinta de sujeción formada con resina de PVA, tendrá una densidad menor, siendo más elástica y flexible que los filamentos de PVA. Por su parte, cuando al cinta de sujeción flexible no incluye ningún tipo de filamentos, su densidad será la misma a lo largo de toda su estructura. Como se mencionó anteriormente, la densidad con la que se trabaja el PVA para conformar la cinta de sujeción toma un papel relevante, ya que se debe trabajar en un rango de densidad que varía entre 1,1 y 1,55 g/cc, de manera que se forme una cinta de sujeción resistente y flexible a la vez. When the flexible fastening tape includes PVA filaments, these will have a slightly higher density than the density of the rest of the fastening tape. In this case, as already mentioned, the fastening tape formed with PVA resin will have a lower density, being more elastic and flexible than PVA filaments. For its part, when the flexible fastening tape does not include any type of filaments, its density will be the same throughout its entire structure. As previously mentioned, the density with which the PVA is worked to form the fastening tape plays a relevant role, since it must work in a density range that varies between 1.1 and 1.55 g/cc, so that a resistant and flexible fastening tape is formed at the same time.
Ejemplo 2: Prueba de desintegración del kit sanitario. Alcance: Esta prueba es un método simple, que consiste en poner la cinta de sujeción flexible sin filamentos, en un vaso precipitado de 2 litros y determinar el tiempo que demora en disolverse. Además, se prueban dos condiciones: 1) con agitación, y 2) sin agitación. Esto con el fin de determinar cuánto demora el producto en disolverse en agua estancada, así como agua en movimiento, dependiendo dónde pueda terminar el producto, si es desechado involuntariamente al ambiente. Example 2: Disintegration test of the sanitary kit. Scope: This test is a simple method, which consists of placing the flexible tape, without filaments, in a 2 liter beaker and determining the time it takes to dissolve. In addition, two conditions are tested: 1) with agitation, and 2) without agitation. This in order to determine how long it takes for the product to dissolve in stagnant water, as well as moving water, depending on where the product may end up, if it is inadvertently discarded into the environment.
Materiales: i) Agitador magnético (marca CORNING®), a velocidad media (700-800 rpm); ii) barra magnética; iii) cronometro; y iv) vasos precipitados de 2 L. Materials: i) Magnetic stirrer (CORNING® brand), at medium speed (700-800 rpm); ii) magnetic bar; iii) stopwatch; and iv) 2 L beakers.
Resultados: Se tomó el tiempo de disolución en el agua, de la cinta de sujeción flexible, con y sin agitación, los resultados se muestran en la Tabla 1. Se obtuvo que bajo agitación, la cinta de sujeción flexible se disuelve mucho más rápido que sin agitación (agua estancada). Se consideró que una desintegración del 50%, es cuando hay una disgregación del material suficiente, para liberar el contenido intemo, quedando trozos de distinto tamaño y forma en el vaso precipitado con agua. Mientras que, una desintegración del 100%, es cuando el material está completamente disuelto e integrado en el agua y no se ven partículas de ningún tamaño dentro del vaso precipitado. Results: The dissolution time in water of the flexible support tape was taken, with and without agitation. The results are shown in Table 1. It was obtained that under agitation, the flexible support tape dissolves much faster than without agitation (standing water). It was considered that a disintegration of 50% is when there is a disintegration of the material sufficient to release the internal content, leaving pieces of different sizes and shapes in the beaker with water. Whereas, a 100% disintegration is when the material is completely dissolved and integrated into the water and no particles of any size are seen inside the beaker.
Tabla 1: Resultados prueba de desintegración en agua de una cinta de sujeción de 30 mm de longitud y con una densidad del PVA de 1,1 g/cc. Table 1: Results of the disintegration test in water of a 30 mm long fastening tape with a PVA density of 1.1 g/cc.
TIEMPO DE DEGRADACIÓN DEGRADATION TIME
Cinta de sujeción flexible Ni l D r d ión
Figure imgf000014_0001
Flexible clamping tape Ni l D rd ion
Figure imgf000014_0001
Por tanto, las pruebas avalan y certifican que la cinta de sujeción flexible, es completamente soluble en agua y en un corto tiempo, lo cual difiere de otras cintas de sujeción flexible del arte previo, que no son hidrosolubles, por lo que pueden tardar años en desintegrarse. En consecuencia, los ejemplos y descripción de la invención anteriores, sustentan el invento en cualquiera de sus formas, demostrándose que presenta una ventaja técnica sobre el arte previo. Además, el material utilizado es conocido en el arte previo, cumple con las normas y requerimientos de la FDA, y es amigable con el medio ambiente, y finalmente, nadie ha anticipado una cinta de sujeción flexible soluble en agua que está hecha en su totalidad de PVA. Therefore, the tests guarantee and certify that the flexible fastening tape is completely soluble in water and in a short time, which differs from other flexible fastening tapes of the prior art, which are not water-soluble, so they can take years to disintegrate. Consequently, the previous examples and description of the invention support the invention in any of its forms, demonstrating that it presents a technical advantage over the prior art. In addition, the material used is known in the prior art, complies with FDA standards and requirements, and is friendly to the environment, and finally, no one has anticipated a water-soluble flexible fastening tape that is made entirely of PVA.
El alcance de la cinta de sujeción flexible, descrito en la presente invención, no debe limitarse sólo a los componentes mencionados en el texto mismo (formas, disposiciones, diseños), ya que pueden existir otros tipos de diseños no indicados en la sección de figuras. The scope of the flexible fastening tape, described in the present invention, should not be limited only to the components mentioned in the text itself (shapes, arrangements, designs), since there may be other types of designs not indicated in the section of figures.

Claims

REIVINDICACIONES Cinta de sujeción flexible, ambientalmente amigable, para el amarre de bolsas o empaques de productos alimenticios, CARACTERIZADA porque comprende un cuerpo base de material flexible y moldeable en donde el material flexible está comprendido por un material polimérico soluble en agua. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 1, CARACTERIZADA porque el material polimérico soluble en agua está formado a partir de resina polivinil alcohol. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 1 CARACTERIZADA porque el cuerpo base tiene forma de un hilo continuo. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 3, CARACTERIZADA porque la forma de hilo continuo tiene un diámetro entre 0,5 y 5 milímetros. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 1, CARACTERIZADA porque el cuerpo base tiene forma rectangular. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 5, CARACTERIZADA porque la cinta de forma rectangular, tiene una extensión entre 10 y 5.000 milímetros. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 6, CARACTERIZADA porque la cinta se puede encontrar enrollada sobre un carrete. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 6, CARACTERIZADA porque la cinta se puede encontrar en unidades separadas pero de una misma longitud. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 5, CARACTERIZADA porque el cuerpo base de forma rectangular, incluye al menos un filamento insertado a lo largo de la cinta. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 9, CARACTERIZADA porque el filamento es de un material polimérico flexible o de un material metálico flexible. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 9, CARACTERIZADA porque el filamento se inserta en la sección central longitudinal de la cinta. La cinta de sujeción flexible, ambientalmente amigable, de acuerdo a la reivindicación 9, CARACTERIZADA porque se insertan dos filamentos, cada uno en la proximidad de cada borde longitudinal de la cinta. CLAIMS Flexible, environmentally friendly fastening tape for tying bags or packaging of food products, CHARACTERIZED in that it comprises a base body of flexible and moldable material where the flexible material is comprised of a water-soluble polymeric material. The flexible, environmentally friendly fastening tape, according to claim 1, CHARACTERIZED in that the water-soluble polymeric material is formed from polyvinyl alcohol resin. The flexible, environmentally friendly fastening tape, according to claim 1, CHARACTERIZED in that the base body is in the form of a continuous thread. The flexible, environmentally friendly fastening tape, according to claim 3, CHARACTERIZED in that the continuous thread form has a diameter between 0.5 and 5 millimeters. The flexible, environmentally friendly fastening tape, according to claim 1, CHARACTERIZED in that the base body has a rectangular shape. The flexible, environmentally friendly fastening tape, according to claim 5, CHARACTERIZED in that the rectangular-shaped tape has an extension between 10 and 5,000 millimeters. The flexible, environmentally friendly fastening tape, according to claim 6, CHARACTERIZED in that the tape can be found wound on a reel. The flexible, environmentally friendly fastening tape, according to claim 6, CHARACTERIZED in that the tape can be found in separate units but of the same length. The flexible, environmentally friendly fastening tape, according to claim 5, CHARACTERIZED in that the rectangular-shaped base body includes at least one filament inserted along the length of the tape. The flexible, environmentally friendly fastening tape, according to claim 9, CHARACTERIZED in that the filament is made of a flexible polymeric material or a flexible metallic material. The flexible, environmentally friendly fastening tape, according to claim 9, CHARACTERIZED in that the filament is inserted in the central longitudinal section of the tape. The flexible, environmentally friendly fastening tape, according to claim 9, CHARACTERIZED in that two filaments are inserted, each one in the vicinity of each longitudinal edge of the tape.
PCT/CL2022/050008 2022-01-20 2022-01-20 Water-soluble flexible fastening strip WO2023137571A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA424081A (en) * 1944-11-28 R. Beebe Gilbert Thread for bags
US2936488A (en) * 1957-06-18 1960-05-17 Rhone Poulenc Sa Process for the production of polyvinyl alcohol yarns and films from polyesters
DE1200471B (en) * 1959-08-10 1965-09-09 Kurashiki Rayon Co Process for the production of polyvinyl alcohol threads or fibers with improved colorability
US4119604A (en) * 1976-08-18 1978-10-10 E. I. Du Pont De Nemours And Company Polyvinyl alcohol compositions for use in the preparation of water-soluble films
WO2021002820A1 (en) * 2019-07-01 2021-01-07 Veri̇tas Teksti̇l Konfeksi̇yon Pazarlama Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Method for production of poly-vinyl alcohol -filament fibre of high strength and elasticity

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA424081A (en) * 1944-11-28 R. Beebe Gilbert Thread for bags
US2936488A (en) * 1957-06-18 1960-05-17 Rhone Poulenc Sa Process for the production of polyvinyl alcohol yarns and films from polyesters
DE1200471B (en) * 1959-08-10 1965-09-09 Kurashiki Rayon Co Process for the production of polyvinyl alcohol threads or fibers with improved colorability
US4119604A (en) * 1976-08-18 1978-10-10 E. I. Du Pont De Nemours And Company Polyvinyl alcohol compositions for use in the preparation of water-soluble films
WO2021002820A1 (en) * 2019-07-01 2021-01-07 Veri̇tas Teksti̇l Konfeksi̇yon Pazarlama Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Method for production of poly-vinyl alcohol -filament fibre of high strength and elasticity

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