WO2019100131A1

WO2019100131A1 - Bag- or sack-like packaging and method for obtaining bag- or sack-like packaging

Info

Publication number: WO2019100131A1
Application number: PCT/BR2018/050432
Authority: WO
Inventors: Marcelo Funaro Vivolo
Original assignee: Embrasatec Indústria E Comércio De Embalagens Ltda.
Priority date: 2017-11-23
Filing date: 2018-11-22
Publication date: 2019-05-31
Also published as: BR102017025098A2

Abstract

The present invention relates to a bag- or sack-like packaging made of raffia, in particular designed for the packaging, transportation and handling of loose and/or powdered solids that has a raffia body (2) formed by a polymer fabric that receives at least one coating layer (13) made of metal, the packaging (1) being obtained by welding and being designed to protect the packaged product from the light, i.e. to provide photoprotection, to act as an excellent barrier against moisture and to provide a packaging that is aesthetically attractive to the consumer with high print quality.

Description

Summary of the Invention Patent for "PACKAGING OR PACKAGING TYPE PACKAGING, AND METHOD FOR OBTAINING PACKAGING OR PACKAGING TYPE PACKAGING".

The present invention relates to a raffia bag or bag type package, particularly designed for the conditioning, transport and handling of powdered and / or bulk solids, the construction of which enables the use of glue to be its manufacture of an aluminum coating that, in addition to protecting the packaged product from light and serving as an excellent barrier against moisture, still offers an aesthetically attractive packaging.

The present invention further relates to a method for obtaining a bag or bag type package such as the above.

DESCRIPTION OF THE STATE OF THE TECHNIQUE

Bagpipes or raffia sacs have been known for many decades and are widely used for the packing of various products, particularly solid powder and / or bulk materials such as soil, fertilizers, grains, sugar, coffee, flour , feed, PVC compounds, cement, among many others.

[004] Raffia packages consist of several flat strips, a width of a few millimeters, manufactured by means of an extrusion process of a polymer such as polypropylene or polyethylene or other fibers or mixtures of fibers. These raffia tapes are oriented, drawn and rolled into tubes to be woven, resulting in a polymeric fabric. More resistant and inviolable, raffia guarantees an effective protection against moisture, its surface and the action of rodents, important characteristics for food storage.

[005] Raffia sacs are available in traditional sewn versions or in more modern versions, where the closure is made by adhesive or welding. And put- It is possible to choose and combine several characteristics for raffia sacs such as aperture type, size, type of lamination, etc.

[006] In particular, when dealing with welded packagings, there are some variations in the type of lamination used. In standard or standard lamination, for example, a polymer substrate, preferably polypropylene, is applied which is placed on the raffia fabric to waterproof the material. In this process, the polymeric substrate is applied to the outer portion of the bag, being pressed on both sides, the front and back sides of the bag.

There is also the so-called film lamination in which, in addition to the normal lamination, a polymer film is produced which is placed on the lamination. The lamination is done with an extruder that melts the polymer and applies over the raffia fabric. The polymer film is placed on the lamination, in particular in cases where an extra barrier is required. The lamination itself functions as an adhesive for the polymer film, since the polymeric substrate is applied hot. The polymer film may be comprised of cast polypropylene (CPP) or biaxially Oriented Polypropylene (BOPP), among others. It should be noted that BOPP polymer film is particularly used for cases where high print quality is required.

Another option found on the market is raffia sacs with photoprotection, in which a black fabric is applied to the inner portion of the sachet in order to protect the packed product from light. However, it has been found that the photoprotection paste, currently found, generates a high index of trimming in its manufacturing process, because the use of the black ribbons makes it difficult to maintain the hardware and equipment (extruder), raising the time required for cleaning and generating product losses.

[009] In addition to the difficulty of cleaning and product losses, the current photoprotection cartridges are produced with black ribbons and white lamination, thus leaving the packaging with a dark, opaque and milky tone, losing print quality.

There are still, on the market, raffia packs metallized, but of the traditional type sewn. These druggies use technology that has long since been superseded and replaced by welded packagings.

With respect to welded sacs, great difficulty is encountered in applying a metallised finish, in particular a film or aluminum foil, since the aluminum does not adhere to the polymer substrate in the welding process.

Thus, it is possible to note a demand in the market for raffia-type sacks or bags which, in addition to having the mechanical strength required for packaging, transporting and handling solid powder and / or bulk products, are capable of protecting the product from light, act as a barrier against moisture, and yet offer an attractive look with high print quality.

OBJECTS OF THE INVENTION

The object of the present invention is to provide a raffia bag or bag-type package, particularly designed for the packaging, transport and handling of powdered and / or bulk solids, provided with an aluminum coating which, in addition to protect the packaged product from light, that is, offer photoprotection, and function as an excellent barrier against moisture, yet offers an aesthetically attractive consumer balloon with high print quality.

BRIEF DESCRIPTION OF THE INVENTION

The present invention relates to a raffia bag or bag type package having a raffia body and at least one raffia closure, both formed by a polymeric fabric, the body defining a first end portion and a second an end portion opposite the first end portion, the at least one closure cap being associated with at least one of the first and second end portions, wherein at least one coating layer is applied to the polymeric fabric of the body. The invention relates to a metal composition, the combinations between the at least one closure layer and the at least one of the first and second end portions and between the polymeric fabric of the body and the at least one coating layer being made by welding, that on the body a polymeric substrate is laminated on which are applied sequentially at least a first adhesive layer, the coating layer and, on the coating layer, at least one second adhesion layer is applied, the first adhesion layer, the coating layer and the second adhesion layer forming a film, the first and the second adhesion bed being of polymer composition and the substrate polymeric action being kept molten when applied on the body, the adhesion of the film to the polymer substrate occurring.

The present invention further relates to a method for obtaining a raffia bag or bag type package as defined above which comprises the steps of:

Step i) weaving a raffia body formed by a polymeric material;

Step ii) applying a coating layer of metal composition on the body;

Step iii) association between the polymeric tissue of the body and the coating layer by means of welding.

The present invention also relates to a raffia bag or drawer package having a raffia body and at least a raffia closure cap, both formed of a polymeric fabric, the body defining a first end portion and a second end portion opposite the first portion of the ex- the at least one closure layer being associated with at least one of the first and second end portions, wherein a polymer substrate is laminated on the body, wherein a film is provided on the polymer substrate comprising at least a first polymer composition adhesion layer at least one coating layer of metal composition and at least one polymer composition adhesion layer, the polymer substrate being maintained molten when applied onto the body, the adhesion of the film to the polymer substrate , the associations between the at least one closure cap and the at least one of the first and second end portions and between the polymeric fabric of the body and the film being made by welding, the polymeric substrate being composed of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene vinyl acetate, the first adhesion layer sin of the at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene vinyl acetate, the second adhesion layer being composed of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene acetate vinyl acetate copolymer, the first adhesion layer being sealable, having a composition having chemical parity with the composition of the polymeric substrate and the coating layer being formed of an aluminum film.

Further, the present invention relates to a method for obtaining a raffia bag or bag type package, as defined above, which comprises the steps of:

Step i) weaving a raffia body formed of a polymeric material;

Step ii) laminating a polymeric substrate on the body, the polymer substrate being maintained in a molten state;

Step iii) applying a film on the molten polymeric substrate; Step iv) compressive adhesion of the body and the film on the polymer substrate, the film being comprised of at least one first polymer composition adhesion layer, at least one coating layer of metallic composition and at least one second polymer layer of polymer composition.

SUMMARY OF THE DRAWINGS

The present invention will hereinafter be more fully described on the basis of an exemplary embodiment represented in the drawings. The figures show:

Figure 1 is a perspective view of the package of the present invention;

Figure 2 is a perspective view of the package of the present invention having one of its ends folded and closed by a cover; and

Figure 3 is a schematic representation of a preferred embodiment of the package of the present invention.

DETAILED DESCRIPTION OF THE FIGURES

The present invention relates to a package 1 of the safflower or raffia type whose composition of its elements allows the association by welding them automatically and without the use of glue, giving it a range of advantages according to the invention. objectives of the invention. Figures 1 to 3 illustrate an exemplary embodiment of a package 1 according to the present invention.

For a better understanding of the present invention, the term "raffia" is to be understood as a synthetic compound that forms an interwoven fabric. Commonly, the raffia is composed of a polyethylene or polypropylene fabric, or a mixture between both of these polymers. Nevertheless, the present invention can be realized from raffia composed of other polymers or mixtures of polymers without harming or changing the proposed technical effect.

[0031] Up to the present time, raffia sacs, obtained by were not equipped with a metallized finish which, in addition to providing the reinforcement and mechanical resistance required for safe transport and handling, also offered a photoprotection factor, barrier against moisture, in addition to being aesthetically attractive to the consumer.

For a better understanding of the present invention, the term "welding" is to be understood as the process of joining two polymers by applying heat at their interface and subsequently heating them to join their surfaces. This heating is carried out up to the softening point of the material to be welded.

Accordingly, various studies have been carried out for the development of a package 1 which, at the same time, provides great reinforcement and mechanical strength, so as to guarantee the integrity of the package 1 even at high loads, greater than 40 kg, or 50 kg , or 60kg, or 100kg, or 200kg, and enabled the application of an aluminum film or foil, providing the package 1 with a metallized finish, superior to that found in the state of the art.

The novel innovative differential of the present invention is to provide a welded package 1 capable of receiving an aluminum film with excellent adhesion since typically, the aluminum does not adhere to the polymeric substrate 10, typically used in the art In fact, the present invention relates to an evolution of the present raffia packs 1.

Figures 1 and 2 illustrate the carton 1 of the present invention in its preferred standing configuration and lying with its folded shoulders, respectively. The package 1 essentially comprises a body 2 formed of a polymeric film and suitable for receiving the material to be stored. Preferably, such a body 2 comprises a wall of thin thickness, or film, which limits an inner region where the material will be stored. The body 2 may comprise a cylindrical, rectangular or any other geometry suitable for receiving and storing material.

The body 2 of the package 1 comprises a first end portion 3 which forms a first surface 3 'and a second end portion 4, opposite the first end portion 3, which forms a second surface 4', such as as shown in figure 1.

Preferably, the first color end portion 3 responds to the inlet or filling portion of the package 1, in which a fill valve 6 may or may not be provided, and the second end portion 4 corresponds and should be interpreted as the bottom portion and / or the adjacent portions of the package 1.

The carton 1 is provided with at least one raffia cap 5 formed by a polymeric fabric, the at least one closure cap 5 being associated with at least one of the first and second end portions 3,4.

The construction of the package 1 of the present invention by the use of a closure cap 5 welded to the body 2 allows one to obtain the advantage of the final "palletizable" shape of the package (generally substantially rectangular, and suitable for stacking, trans pallets or not) without the need for glue, thus allowing for easy storage and transport and easier and more efficient recycling of the packaging.

The body 2 as well as the first and second surfaces 3 ', 4' are formed in a tubular polymeric fabric, the so-called raffia, which receives at least one coating layer 13 of metal composition.

In a preferred embodiment of the present invention, the raffia body 2 receives a polymeric substrate 10 laminated on the body 2, a film 11 consisting of at least one first adhesion layer 12 of which is applied to the polymer substrate 10. at least one coating layer 13 of metal composition and at least one second layer of polymer composition 14, so that the polymeric substrate 10 is held molten when applied onto the body 2, providing the adhesion of the film 11 on the polymeric substrate 10.

The polymeric substrate 10, the first adhesion layer 12 and the second adhesion layer 14 are composed, preferably, but not necessarily, of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene acetate. vinyl

The first adhesion layer 12 is sealable, i.e., has a composition having chemical parity with the composition of the polymeric substrate 10, in order to provide the correct adhesion of the film 11 to the polymeric substrate 10.

The coating layer 13 is formed of an aluminum film so that the application of the first and second adhesion layers 12, 14 makes it possible to weld the metal film coating layer 13 on the polymeric substrate 10.

Usually, the process for applying a polymeric film to a polymeric substrate 10 is such that a warm air is blown at about 600Â ° C onto the already laminated package 1, in order to soften the substrate 10. A pressure is then applied by means of rollers which weld between the softened polymeric substrate 10 and the polymeric film. As the composition of the substrate 10 and the film are identical, they have the same softening point, it being possible to carry out the welding.

In the case of the metal film, the softening point is not identical to that of the polymer substrate 10, so that the metal film does not adhere to the substrate 10. Thus, it is not possible to apply a metallic film by simply blowing hot air and applying pressure.

Thus, the metal film coating layer 13 is applied between the first and second adhesion layers 12, 14 of polymeric film, by welding the coating layer 13 on the polymeric substrate 10.

Alternatively, a rolling process can be devised in which metallic particles are added to the polymeric substrate 10, and it is not necessary to apply a metallic film to the coating, since the polymeric substrate 10 would already be metallized .

It should be noted that the film 11 is known in the market, mainly used in food packaging, such as coffee, snack foods and the like. However, there is no commercially available film 11 in a raffia-type package 1.

It is noted that packages found in the prior art do not exhibit the necessary strength and mechanical strength of raffia sachet packaging. The raffia fabric has a complex braided construction, which confers the necessary strength to the package 1. The more technical information, the greater the difficulty in including the metallic film 11 in the lamination process.

Thus, prior art packaging having the film 11 does not disclose sufficient information for achieving the present invention.

The package 1 of the present invention is obtained by a method comprising the steps of:

Step i) weaving the raffia body 1 formed by a polymeric fabric;

Step ii) laminating the polymeric substrate 10 onto the body 2, the polymeric substrate 10 being maintained in a molten state for the accomplishment of subsequent step iii);

Step iii) applying the film 11 onto the polymeric substrate 10;

Step iv) compression adhesion of the body 2 and the film 11 on the polymeric substrate 10.

The package 1 of the present invention confers: [0058] i. photoprotection to the product, being particularly used in animal feed storage, once the light input can change the composition of the product;

[0059] ii. barrier against moisture, increasing the shelf life of the stored product;

[0060] iii. visually optimized, with excellent print quality, being aesthetically appealing to the end consumer.

[0061] Having described one preferred embodiment, it should be understood that the scope of the present invention encompasses other possible variations, being limited only by the content of the appended claims, including possible equivalents thereto.

Claims

A raffia bag or bag package having a raffia body (2) and at least one raffia closure cap (5), both formed of a polymeric fabric, the body (2) defining a first portion of (3) and a second end portion (4) opposite the first end portion (3), at least one closure cap (5) being associated with at least one of the first and second end portions (3) , The packaging (1) being characterized in that at least one coating layer (13) of metal composition is applied to the polymeric fabric of the body (2), the associations between the at least one closure cap ( 5) and at least one of the first and second end portions (3, 4) and between the polymeric fabric of the body (2) and the at least one coating layer (13) being made by welding.

A package according to claim 1, characterized in that a polymeric substrate (10) is laminated on the body (2) on which at least one first adhesive layer (12) is applied sequentially. the coating layer 13 and the coating layer 13 are applied to the coating layer 13, at least one second adhesion layer 14, the first adhesion layer 12, the coating layer 13, the second adhesion layer (14) forming a film (11).

A package according to claim 2, characterized in that the first and second adhesion layers (12, 14) are of polymer composition.

Packaging according to claim 2, characterized in that the polymeric substrate (10) is kept molten when applied onto the body (2), the adhesion of the film (11) occurring on the polymeric substrate (10).

Method for obtaining a bag type package (1) or drawn from raffia as defined in claim 1, characterized in that it comprises the steps of:

step i) weaving a raffia body (2) formed by a polymeric fabric;

step ii) applying a coating layer 13 of metallic composition on the body 2;

step iii) association between the polymeric fabric of the body (2) and the coating layer (13) by means of welding.

A raffia bag or bag package having a raffia body (2) and at least one raffia closure cap (5), both formed by a polymeric fabric, the body (2) defining a first portion of (3) and a second end portion (4) opposite the first end portion (3), at least one closure cap (5) being associated with at least one of the first and second end portions (3) , Wherein a polymeric substrate (10) is laminated on the body (2), the package (1) being characterized in that a film (11) is applied to the polymeric substrate (12) of polymer composition, at least one coating layer (13) of metallic composition and at least one second layer of adhesion (14) of polymer composition, the polymer substrate (10) being held molten when applied on the body (2), the adhesion of the film (1 1) in the polymeric substrate 10, the associations between the at least one closure cap 5 and the at least one of the first and second end portions of 3, 4 and between the polymeric fabric of the body 2 ) and the film (11) being made by welding.

Packaging according to claim 6, characterized in that the polymeric substrate (10) is composed of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene vinyl acetate.

Packaging according to claim 6, characterized in that the first adhesion layer (12) is composed of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene vinyl acetate.

A package according to claim 6, characterized in that the second adhesion layer (14) is composed of at least one of the materials selected from polypropylene and / or polyethylene and / or ethylene vinyl acetate.

Packaging according to claim 6, characterized in that the first adhesion layer (12) is sealable, having a composition having chemical parity with the composition of the polymer substrate (10).

A package according to claim 6, characterized in that the coating layer (13) is formed of an aluminum film.

A method for obtaining a raffia bag or bag pack (1) as defined in claim 6, characterized in that it comprises the steps of:

step i) weaving a raffia body (2) formed by a polymeric fabric;

step ii) laminating a polymeric substrate 10 on the body 2, the polymeric substrate 10 being maintained in a molten state;

step iii) applying a film (11) onto the molten polymeric substrate (10);

step iv) compressive adhesion of the body (2) and the film (11) to the polymeric substrate (10).

A method according to claim 12, characterized in that the film (11) comprises at least one first adhesion layer (12) of polymer composition, at least one coating layer (13) of metal composition and at least a second layer of adhesion (14) of polymer composition.