US-12623825-B2 - Plastic film package with adhesive closure for wrapping various products

US12623825B2US 12623825 B2US12623825 B2US 12623825B2US-12623825-B2

Abstract

Obtained from a thermoplastic film ( 1 ), having the outer side ( 1 A) with corona treatment and distributes breakable lines ( 2 ), between which segments ( 3 A- 3 N) are configured, each of which includes a signaling mark ( 4 ) of the “zero” position of each package, a first layer of medium adhesion adhesive ( 5 ), two (second and third) layers of high adhesive adhesion ( 6 A) and ( 6 B), between which is that breakable line ( 2 ); It also includes a protective/guide strip ( 7 ) that extends over the two layers of high-adhesion adhesives ( 6 A) and ( 6 B), where one of its ends is permanently glued, while its opposite end is folded into a hook ( 8 ) which, in turn, is siliconized on the face that fits over the high-adhesion adhesive layer ( 6 B).

Inventors

HERMAN BRIAN ELIAS MOURA

Assignees

HERMAN BRIAN ELIAS MOURA

Dates

Publication Date: 20260512
Application Date: 20220531
Priority Date: 20210817

Claims (13)

1 . A plastic film package for wrapping products, comprising: a continuous thermoplastic film having an upper surface treated to control surface tension; a plurality of tear lines formed in the film, the tear lines extending in a transverse direction and equidistantly spaced along a longitudinal direction defining a plurality of identical package segments; each package segment including: at least one position mark indicating a starting position of the package segment; a first adhesive layer of medium adhesion disposed on an upper surface of a trailing end of the package segment and extending from a respective tear line; a second adhesive layer of high adhesion disposed on and having a shorter length along the package segment in the longitudinal direction than that of the first adhesive layer and a shorter width than that of the package segment in the transverse direction; a third adhesive layer of high adhesion disposed on an upper surface at a leading end of the package segment; a protective guide strip formed of a plastic liner material and extending over the second adhesive layer of the package segment and the third adhesive layers of an adjacent package segment across the respective tear line, wherein the protective guide strip is permanently bonded to the third adhesive layer of the adjacent package segment and includes an opposite end folded downward and inward to form a hooked tab, the hooked tab having a siliconized surface facing the second adhesive layer of the package segment; wherein each tear line is surrounds the second adhesive layer of high adhesion in a plan view, each tear line including: a transverse intermediate straight portion extending between the second and third adhesive layers and substantially corresponding to the width of the second adhesive layer; parallel portions extending perpendicularly from opposite ends of the intermediate straight portion and substantially corresponding to the length of the second adhesive layer; deflecting portions extending transversely outward from the parallel portions so as to define a tab segment that surrounds the second adhesive layer in the plan view; and wherein upon pulling an initial package segment to separate the initial package segment along a tear line from a following package segment, a front end of the protective guide strip is released from the second adhesive layer of the initial package segment, while a rear end of the protective guide strip remains permanently bonded to the third adhesive layer of the following package segment.
2 . The plastic film package of claim 1 , wherein the treatment to control surface tension comprises a corona treatment.
3 . The plastic film package of claim 1 , wherein the at least one positioning mark is located on a lower surface opposite the upper surface.
4 . The plastic film package of claim 3 , wherein the at least one positioning mark corresponds to a location of the first adhesive layer and/or the third adhesive layer in the plan view.
5 . The plastic film package of claim 3 , wherein the mark is a label providing a barrier against the passage of light.
6 . The plastic film package of claim 1 , wherein the width of the second adhesive layer is 30% to 90% of the package segment in the transverse direction.
7 . The plastic film package of claim 1 , wherein the length of the second adhesive layer is 5% to 15% of the package segment in the longitudinal direction.
8 . The plastic film package of claim 7 , wherein a length of the first adhesion layer is 30% to 60% of the package segment in the longitudinal direction.
9 . The plastic film package of claim 1 , wherein length and width of the third adhesive layer are identical to the length and width of the second adhesive layer.
10 . The plastic film package of claim 1 , wherein the plastic is polyethylene.
11 . The plastic film package of claim 10 , wherein the polyethylene is “green plastic” of renewable origin.
12 . The plastic film package of claim 10 , wherein the plastic film package is provided on a roll.
13 . A bale wrapping comprising the plastic film package of claim 1 .

Description

FIELD OF INVENTION The present invention is related to the following patent applications of the same applicant: BR102015015317-1 filed on 24 Jun. 2015, BR102020010957-0 filed on 29 May 2020 and BR102021008933-4 filed on 7 May 2021 cited herein. In the same way, the present Invention refers to a package in the form of plastic film with variable length and width, as well as its ends have means so that several units can be held interconnected with each other forming a “continuous plastic film” that is prepared in reel and all units also have their ends perforated and with cooperating adherent means to be applied by a dedicated device and subsequent final closure of each package after it wraps or wraps the product. The packaging in question, only varying its dimensioning, is likely to be used as wrapping of various products and raw materials, especially those of serial production, such as: bales in general, coils of various materials, household appliances, electronic devices and components, furniture, boxes, suitcases, paintings or engravings (works of art), mattresses, bundled pillows, channels and conductors in bars, Bundle of electrical wires into rolls, fabric coils, various containers (bottles and jars), food boxes (packaging). Therefore, the packaging in question constitutes a plastic film wrapper that can be wrapped by rolling any product, regardless of the format, wrapping it with one or more turns and, at the end, the end of the film is fixed by an adhesive layer, stabilizing the entire wrapping. STATE OF THE ART In addition to the documents mentioned above, there are other different packages prepared in the form of continuous plastic films, as taught, for example, the documents: GB1000697, US2011/0172073 A1, JPH10273201, U.S. Pat. No. 5,983,594 and BR102015015317. Therefore, there are currently several different ways adopted to wrap a product or several products at once using continuous plastic films. One well-known way is the use of “heat shrink or heat shrink” film. Another way is known as “plastic film” simply. The first wraps the product with some slack, and after applying heat, the film shrinks and dents against the product. In the second way, the film is actually very thin and fits over the product easily. Of course, there are many variations for the material in both cases, depending on the product to be wrapped. On the other hand, there are also plastic films with variable thicknesses prepared in rolls used to wrap different products and, in this case, the film is unwound and cut to the predetermined length and its ends have means with adherent resources for final closure of the package. In some cases, there are also continuous plastic films with varying widths and thicknesses prepared in rolls used to wrap different products and, in this case, the film is unwound and cut to length with a manual stylus, as well as its final closure is carried out with adhesive tape at various points, including in the longitudinal direction to consolidate the wrapping. There is no doubt that the well-known ways to wrap miscellaneous items have a certain efficiency, however some disadvantages are noted, that is, the well-known packages with adherent media at their ends have limited application, as they are specifically designed for certain applications. On the other hand, in other well-known packages, we can highlight other disadvantages, mainly the lack of control over the amount of film used (usually more than necessary). As the cut is not regular and the width of the commercial tapes is narrow, it is necessary to pass several adhesive tapes to secure all the ends of the irregular cut, and to consolidate the wrapping, pass other adhesive tapes in the longitudinal direction. Another disadvantage is that all the film tensioned during the wrapping process is lost at the time of cutting with the stylus, causing the wrapping to unpack and difficulty in finishing it. It is also worth noting the fact that some common packages, especially baling packages, do not have efficient means to neutralize baling stresses, which markedly reduces the time in which the set is exposed in the field, because, at this stage, the time of exposure to bad weather is a critical factor to maintain the integrity of the package. On the other hand, the usual packaging does not have characteristics specially developed so that it can be produced in “green plastic”, because this, as it is known, is a practical and economical alternative for the packaging industries to preserve the environment, since green plastic is a polyethylene produced from ethanol from different plants. Such as: sugarcane, cassava, potatoes, corn, sugar beets and others of renewable origin, 100% recyclable and does not contribute to global warming. OBJECTIVES OF THE INVENTION In view of the above circumstances and with the aim of overcoming them, the present packaging was created in the form of plastic film with completely different technical characteristics in relation to