UA108982C2 - POLYMER FOUNDATION WITH ADHESIVE LOW-ADHESIVE MATERIAL - Google Patents

Abstract

A polymeric base to which a UV-curable adhesive material containing a polymeric substrate, at least in part of which a certain number of particles enhancing the adhesion of the filler, is dispersed is attached. At least part of the particles of the reinforcing adhesive of the filler provides enhanced adhesion between the UV-cured adhesive material and the polymer substrate.

Description

The field of technology

The present invention relates generally to self-adhesive materials with low stickiness, more precisely, to self-adhesive materials with low stickiness applicable in packages.

Technical level

The present invention relates generally to polymer substrates on which adhesive materials with low stickiness are applied, more precisely, to adhesive materials with low stickiness that have enhanced adhesion to polymer substrates.

Several types of sealing means or fasteners are known for resealing a previously opened package. For example, it is customary to use mechanical resealable fasteners such as zippers, clips, tabs, connecting strips, etc. These mechanical fasteners can be bulky, complex structures that require separate forming and assembly steps to manufacture. to their attachment to the package. In addition, film in rolls and other packaging materials that use such fasteners can become heavy and difficult to handle due to the increase in volume due to the fasteners. In addition, such fasteners can significantly increase the cost of materials and the cost of manufacturing packaging. Mechanical latches may also not provide an airtight seal after occlusion. For example, when in the closed position, the zippers may have an undesirably small air channel or gap due to the closing of the connecting edges between the horse stop and the runner. These mechanical fasteners can be used in form-pack-clogging operations, but this may require complex stages of the manufacturing process to install, connect and align the elements of such a design. For this reason, mechanical resealable fasteners can unnecessarily increase the complexity, expense and cost of manufacturing such packages.

One alternative to the mechanical retainers discussed above is resealable adhesive-based retainers. However, fixatives based on an adhesive material create other difficulties, both in their manufacture and creation. For example, for the manufacture of fasteners based on resealable self-adhesive material (SCM), thermoplastic elastomers (TEP), which are sometimes called thermoplastic rubber, are used.

Z Some types of TEP copolymers (especially some styrene block copolymers) have good cohesive properties and at the same time low stickiness or reduced tendency to stick to dissimilar materials. TEPs can be useful for creating resealable retainers, but such TEPs typically have undesirably strong cohesive properties, making them difficult to use as a resealable package retainer because they are capable of delamination at the interface with the package liner, rather than at the bonding interface. In addition, TEPs may need to be dissolved so that they can be applied to the packaging substrate in a transverse or longitudinal direction in the form of an interlaced structure. In some cases, organic solvents applicable as a carrier for TEP may not be acceptable for contact with food products. It was proposed to apply TEP as an aqueous dispersion on a stencil, however, obtaining aqueous TEP dispersions applicable for flexographic or rotogravure printing is difficult from a technical point of view. Even if a technically feasible method of dispersing TEPs in water were developed, stenciling aqueous TEP dispersions would be industrially infeasible for high-volume consumer packaging due to the high cost of removing the aqueous carrier after coating.

Other types of self-adhesive materials (SCMs) can be used as resealable fasteners for packages, but resealable fasteners based on conventional SCMs generally have a high tackiness. Stickiness is a property of an adhesive material that generally allows the material to adhere to the surface of another material with short-term or light pressure. Stickiness is often considered the characteristic of rapid adhesion, initial adhesion, or rapid setting of a material. Conventional SCM in general cannot be applied to the surface of materials that are intended for use on industrial equipment for the formation of packages. Typical difficulties encountered when trying to use SCM-coated materials on packaging equipment include: jamming, when the material does not unwind freely from the roll due to unacceptable adhesion on the reverse side; pick-up, when unwanted and unintended transfer of adhesive material onto equipment surfaces such as rollers, frames, and fuel tubes occurs; poor alignment, such as the inability of the material to maintain an accurate orientation as it passes through the packaging machine; and jamming, when material is unable to slide 60 over equipment surfaces and becomes stuck.

SCM-based resealable retainers may also cause inconvenience to the consumer using the molded package. If the package contains a crumbly product (i.e., cookies, crackers, etc.) or a ground product (i.e., shredded cheese, etc.), due to the high stickiness of most SCMs, crumbs or particles of the product may stick to the SCM, impairing the ability of the SCM to form a sufficient sealing agent due to contamination of its surface with a food product. A SCM-based retainer that is heavily contaminated with product will not normally serve as an adequate sealing agent because the crumbs adhering to the SCM generally prevent the SCM from adhering to the other side of the package.

SCMs with less stickiness, which act as binding materials, create other inconveniences.

A less tacky adhesive may have difficulty adhering to the packaging surface due to its low tack properties. Thus, in fixatives using SCM, which have less stickiness, peeling of the SCM from the surface of the package may occur after opening the package.

The essence of the invention

In the invention, a polymer base is proposed, on which a UV-curable adhesive material with low stickiness, which has increased adhesion strength, is applied. According to one of the features of the invention, the polymer base contains a polymer substrate, at least in a part of which a certain number of particles of an adhesion-enhancing filler are dispersed, and a UV-curable adhesive material with low stickiness is applied to the polymer substrate.

According to another feature of the invention, at least part of the particles of the adhesion-enhancing filler is at least at the boundary of the polymer substrate and the UV-curable adhesive material with low stickiness, due to which the increased primary bond strength of the UV-curable adhesive material with low stickiness and the polymer substrate is provided, which is at least about 600 grams per linear inch (236.22 g/lamb).

Brief description of the drawings

In fig. 1 shows a perspective view of one example of a flexible package with a resealable adhesive-based fastener, illustrated open, in FIG. 2A shows a perspective view of the second embodiment of one of the examples

From a package with a resealable adhesive-based retainer, illustrated closed, in FIG. 2B shows a perspective view of the one shown in FIG. 2A of the package illustrated open in FIG. FIG. 1 shows a perspective view of a third embodiment of one of the examples of a rigid package with a resealable adhesive-based fastener, in FIG. 3B shows a perspective view of the fourth embodiment of one of the examples of packaging with a rotary lid and a resealable fastener based on an adhesive material, in Fig. 3B shows a perspective view of the fifth embodiment of one of the examples of a rigid package with a resealable fastener based on an adhesive material, in FIG. 4 shows a cross-sectional view of one of the examples of a resealable fastener based on an adhesive material, in FIG. 5A is a cross-sectional view of a resealable adhesive-based retainer illustrated open with the package filled in FIG. 5B shows a partial cross-sectional view of FIG. BA resealable retainer based on adhesive material, illustrated closed, in FIG. b shows one of the examples of the process of applying a resealable fixator based on an adhesive material to the packaging substrate, in fig. 7 shows one example of the process of forming a package using a resealable fastener based on an adhesive material, in fig. 8 shows a cross-sectional view of another example of an adhesive-based resealable retainer, and FIG. 9 and 10 show examples of processes for manufacturing packages with resealable fasteners based on adhesive material 1. Detailed description of the invention

Next, a resealable retainer based on a low tack adhesive material and a package in which the retainer is used will be described. The retainer has opposing layers, areas, or structures of low-tack adhesive material that are releasably bonded to each other and seal the package. The retainer is bonded to the package backing with sufficient 60 force so that the opposing adhesive layers do not peel away from the package backing when it is opened, even if the adhesive material is of low tack. The adhesive material used to create the retainer also has a relatively high bond strength, but at the same time a relatively low stickiness, due to which it is able to function as an effective resealable retainer even when exposed to crumbs, fluff, particles, etc. The opposing adhesive layers can be applied to a variety of substrates, such as packaging materials including, for example, film, paperboard or other paper products, cardboard, foil, metal, laminates, flexible, rigid or semi-rigid plastics, or combinations thereof. Likewise, these materials can be used to create a variety of packages or containers, including, for example, flexible bags or pouches, cardboard packages or boxes, envelopes, and bi-fold packages as just a few examples.

According to one feature of the invention, the adhesive-based resealable retainer and/or package liner as a whole is designed or composed to minimize adhesion of the resealable to undesired surfaces while still acting as an effective resealable retainer. In other words, the adhesive-based retainer (or) package liner has a unique composition or design that provides selected levels of tack and peel so that the adhesive-based retainer can be repeatedly opened and closed to seal the contents of the package during consumer use, but at the same time so that it does not peel away from opposing packaging backing elements.To this end, a resealable retainer typically contains a UV-curable adhesive material having a relatively low tack to minimize adhesion to undesirable surfaces, selected adhesion force or a peel resistance on opening sufficient to ensure reliable resealing of the package, and a peel resistance resistant enough to allow repeated opening and resealing of the package. At the same time, the fastener also has a strong bond with the package lining, due to which the adhesive material does not peel off after opening the fastener to access the contents of the package. According to one approach, a resealable adhesive-based retainer may contain special blends of a UV-curable acrylic oligomer and a tackifier.

From the material. According to other approaches, the resealable adhesive-based retainer may contain special blends of at least one UV-curable acrylic oligomer, at least one tack-controlling material, and at least one elastomer (rubber).

According to one approach, a resealable retainer based on a UV-curable adhesive material is a UV-curable self-adhesive material (SCM) that has cohesive properties and low tackiness, but despite the low tackiness, provides strong adhesion to the packaging substrate, which forms opposite packing elements. In general, it is meant that a cohesive material usually adheres more easily to similar materials (i.e. has autohesion) than to dissimilar materials.

Applicable adhesive materials used in the invention generally have relatively low adhesion to undesirable surfaces, but at the same time have good adhesion to desired surfaces (i.e., do not peel off from opposing elements) and relatively good cohesive properties or adhesion to auto-adhesive account with similar surfaces to keep the package or package closed, but still allow for manual opening or uncorking of the package. Selected adhesive materials also provide the ability to detach or peel away from such similar materials so that the adhesive layers can be repeatedly separated without substantially damaging the adhesive material K((or) the underlying package substrate. When the adhesive material is detached or peeled, the selected adhesive materials adhesive materials, due to sufficient internal integrity, in general, are preferably carefully peeled off at the boundary of adhesion of the adhesive material without significant grasping of the material, traction, peeling from the packaging substrate (or) other significant distortions of the material (i.e. clumping, peeling, etc.). Described in the invention adhesive-based fasteners preferably maintain peel adhesion if the average initial peel adhesion of the adjacent opposing strips of adhesive material exceeds about 200 grams per linear inch (g/d) (78.74 g/m), in some cases from about 200 g /ld (78.74 g/lom) to about 900 g/ld (354.72 g/bar). In addition, in some cases, after five repeated capping and uncapping operations, the adhesive-based retainers retain a peel adhesion greater than about 200 g/ld (78.74 g/rom) (or) that is at least from about 30 95 to about 200 95 average value of adhesion at the first peeling.

According to another feature of the invention, the package with the fixative based on the adhesive material is also designed in such a way that the adhesion force or resistance to peeling of the resealable fixative based on the UV-curable adhesive material from the substrate of the package as a whole exceeds the resistance to peeling of the layers of the fixative itself when opened. Thereby, the resealable retainer generally remains engaged with the package liner and does not catch, stretch, or peel away from the package liner when the consumer opens the package and uncorks the retainer. For example, according to one approach, the adhesive material has an initial adhesion or peel resistance to the package substrate greater than about 600 g/ld (236.22 g/roll) (in some cases greater than about 900 g/ld (354.72 g/roll )) and is capable of withstanding many cycles of uncapping and re-capping without detaching from the film substrate. In addition, because the adhesive material is curable, it is able to withstand more than 100 double wipes using methyl ethyl ketone (MEK) solvent.

Let's turn to the drawings, in particular, fig. 1-3, which generally illustrate one example of a package 10 with a resealable retainer 12 based on a UV-curable adhesive material. The package can be flexible packages such as bags, pouches, sachets, etc., as well as rigid packages such as boxes, cartons, envelopes, etc. In general, the package has many walls that form a cavity to accommodate one or more products, such as foodstuffs. According to some approaches, the package additionally has opposing liner elements that can be connected to each other to limit or block access, contain the contents, and/or keep them fresh. The described fixator based on an adhesive material having opposite adhesive areas can be located on opposite elements and provide resealing of the package. In this case, the user can separate the opposing members and the opposing adhesive areas thereon to gain access to one or more products contained in the cavity. The user can then connect the opposing elements to each other, for example by moving the elements towards each other or by rotating one or both elements relative to each other and applying light pressure so that the opposing adhesive areas adhere to each other, thereby resealing the package. These opening and reclosing operations can be performed multiple times with minimal to zero loss of latching force.

In fig. 1 and 2 generally illustrate a flexible package utilizing an adhesive-based retainer 12. In fig. 1 shows the package 10, which is open, and in fig. 2A generally illustrates a package 10 that is closed or sealed. In fig. A package 10 is generally illustrated in the form of a more rigid box of the flap type, applicable to the packaging of one or more products, such as wafers of chewing gum. In fig. ZB shows a box or cardboard package with a fastener 12 based on an adhesive material, and in fig.

3 shows an envelope or a paper bag using a fastener 12 based on an adhesive material. It should be noted that in fig. 1-3 illustrated examples of packages, and if necessary, in a specific situation, packages of other types, sizes and configurations can also be used.

In general, shown in fig. 1-3 packages 10 are made of one or more sections, elements or sections of material or substrate 14, from which opposite front and rear elements, walls, etc. are formed (shown in the drawings as elements 16 and 18). The opposite walls also have opposite areas or structures of adhesive material 30 and 32 located thereon.

However, as noted above, the package may be of various shapes with various configurations or apertures for resealable resealable retainer 12, particularly opposing areas or structures of adhesive material 30 and 32.

In the example illustrated in fig. 1 and 2, the package 10 may also include a non-creasing fold 20 running along its bottom edge 22 and transverse or side seals 24 running along its side edges 26, resulting in a gap between the front member 16 and the rear member 18 package 10, a cavity 28 is formed to accommodate an article such as a food product component, food product or other product. The package 10 may additionally include an upper seal 23 (Fig. 2A) located above the resealable retainer 12 based on an adhesive material when the package 10 is in an upright position. It should be noted that the package form 10 is illustrated only as one example of several types of packages applicable for use with the resealable bo retainer 12 based on an adhesive material. As noted above, containers/packages of other shapes, configurations, and materials may also be used in conjunction with the adhesive-based resealable retainer 12. The package 10 may additionally contain other pleats, seals, wedges, and/or valves that are typically required for a particular application. Instead of a pleat 20, the package 10 may also include a bottom seal at the bottom edge 22. The package 10 may also optionally include non-re-closable, flaky seals 11 (shown, for example, in Figs. 1 and 2A) that are located above or below the re- closable latch 12, as generally described in application O5 11/267174, the content of which is incorporated in its entirety by reference. In addition, the package 10 may also optionally include a tear line 13 of least resistance (Fig. 2A) between the resealable retainer 12 and the upper edge of the package 10, upon complete rupture of which a portion of the upper edge of the package 10 is removed and a removable seal is formed over the resealable retainer 12 shell 15, which provides opening of the package, as shown in fig. 2B.

Consider fig. 4, which illustrates one form of resealable adhesive-based retainer 12 having opposing adhesive layers or adhesive areas 30 and 32, with layer 30 on front member 16 and layer 32 on rear member 18. Layers 30 and 32 of the retainers are generally coaxial with each other such that the outward facing surfaces 34 and 36 of each layer 30 and 32, respectively, are located opposite each other and preferably contact each other in a closed or blocked position due to the mutual engagement of the layers 30 and 32 32. The adhesive layers 30 and 32 are preferably located on the outer or inner surfaces of the front element 16 and the rear element 18, as shown in FIG. 4, BA and 5B. Alternatively, in packages of other shapes, adhesive layers 30 and 32 may optionally be provided on opposite portions of the hinged container (FIG. 3A), on overlapping flaps (FIG. 3B), on the package body and lid flap (FIG. ЗВ) or on other packaging surfaces. As shown, the shape, location, and configuration of layers 30 and 32 may vary as desired or to meet the requirements of a particular application. Adhesive areas 30 and 32 can also be provided in the form of interspersed forms, structures, lines, which can be regularly or irregularly spaced among the packaging elements.

Preferably, each of the opposing adhesive layers 30 and 32 can be used as a liquid coating mixture that can be heated to a moderately warm temperature, such as about 160°F (71°C), but also in the range of about 86°F. (30 "C) to about 190 "E (88 C), and applied to the substrate. After coating, the mixture, which may contain a photoinitiator added to it, can be exposed to ultraviolet radiation in order to cure (polymerize) the coating and form a package on the substrate of the hard adhesive-based retainer 12. According to one feature of the invention, the thickness of the applied coating may be about 0.0005 inches (12.7 microns), but may range from about 0.0001 inches (2.54 microns) to about 0.005 in. (127 µm); however, depending on the design, configuration, and packaging requirements, the coating thickness applied can be significantly greater. In one approach, the coating mixture does not contain or preferably contains no solvents to be removed and can be easily applied to the packaging substrate on high-speed coating and printing flow lines.

The first component of the adhesive material is one or more components comprising UV-curable acrylate or acrylic oligomers. For example, a UV-curable acrylic oligomer can be an acrylic or methacrylic acid ester containing multiple reactive or functional groups (ie, acrylic or methacrylic oligomers).

Typically, the functional group has one UV-responsive site. According to one approach, UV-responsive sites are most often carbon-carbon double bonds conjugated to another unsaturated site, such as an ester carbonyl group.

According to one approach, the UV-curable acrylic oligomer is an ester of acrylic or methacrylic acid that contains multiple alcohol functional groups, meaning that the backbone of the oligomer contains multiple acrylic or methacrylic hydroxyl groups. According to one approach, the adhesive material may contain from about 1 95 to about 90 95 by weight of UV-curable acrylic oligomers and have from about 1.2 to about 6.0 functional groups. According to another approach, UV-curable acrylic oligomers can have from about 2.0 to about 3.0 functional groups. According to other approaches, the adhesive material may contain from about 20 956 to about 70 95 by weight (in some cases from about 33 95 to 60 95 by weight) of acrylic oligomers.

In one embodiment, the multi-functional UV-curable acrylic acid ester is an acrylic acid ester of a vegetable oil containing 2.0 or more reactive functional groups. According to another feature of the invention, the UV-curable acrylic oligomer may contain epoxidized soybean oil acrylate.

Usually, the amount of UV-curable acrylic oligomers used, taking into account the ratio of adhesive components (ACR) (to be discussed further), can affect the properties of the final adhesive material. For example, if the amount of UV-curable acrylic oligomer is too small for better SCC, the curing rate of the final adhesive is too low. On the other hand, if the amount of UV-curable acrylic oligomer is too large for better SCC, the final adhesive may be satisfactorily cured but may have unsatisfactory sealing and resealing autoadhesive properties.

The second component of the adhesive material is a stickiness-regulating substance. According to one approach, the adhesive material may contain from about 1,956 to about 65,95 by weight of the tackiness control material. According to another approach, the tack-controlling agent may be present in an amount of from about 20 95 to about 65 95. The tack-controlling agent may include a tack-enhancing resin or a curable polymer/monomer combination that, when cured, is capable of providing desired levels of tack and autoadhesive properties acceptable for a resealable fixator 12. According to one of the features of the invention, the stickiness-regulating substance can be an aliphatic urethane-acrylic oligomer. Many other types of tack control materials applicable to UV-curable SCMs can also be used in the resealable adhesive system.

An optional third component of the adhesive material is at least one elastomer or rubber. According to one approach, the elastomeric component may contain at least one curable acrylic (ie, modified acrylic) or methacrylic ester polyelastomer with terminal hydroxyl groups (ie, elastomeric polyol). This elastomeric component may contain modified acrylic polybutadiene, saturated polybutadiene, and/or flexible polyurethane. According to one of the features of the invention can

Methacrylic polybutadiene is used. The elastomeric material may be present in amounts from about 0.95 to about 20.95 when used in the adhesive. According to one of the features of the invention, the elastomeric material is used in an amount of approx

B9Ub to about 1595. Satisfactory adhesive materials with the desired low tack and resealing properties described in the invention can be obtained without the use of an elastomeric component; however, it is assumed that the elastomeric component contributes to optimal hiding characteristics. The optimal covering characteristics of an adhesive material can be determined by properties such as autohesion, tackiness, viscosity, and curing speed, just to name a few examples. The elastomeric component serves to regulate the properties of resistance to peeling, strength of adhesion to the substrate, increasing flexibility, regulating viscosity and modulating the rate of curing.

It has been determined that in order to balance peel, tack, and adhesion to the package substrate, the three components of the adhesive material, i.e., the acrylic oligomer, the elastomeric component, and the tack control component, must be present in amounts corresponding to a specific adhesive component ratio (i.e., SCC). Mainly,

SCC for adhesive material is: (95 by weight of acrylic oligomer) - 0.5-1.5. (95% by weight of elastomer -- 95% by weight of stickiness-regulating material)

In one preferred embodiment, the SCC may be in the range of about 0.8 to

BO about 1.5.

It was established that the range of SCC of the three components included in the composition provides a unique composition of the adhesive material, which has the property of low stickiness relative to dissimilar substances (i.e. equipment components, crumbs, pieces of food, etc.), but at the same time is capable of self-sealing with with sufficient adhesion or peel resistance to provide sealing as well as to prevent contamination. The adhesive material with this particular CCM also provides a resealable function that does not significantly weaken or lose its seal-unseal-reseal properties with repeated opening and sealing operations. A SCC of less than about 0.5 is generally undesirable, since significantly more UV radiation energy would be required to cure the adhesive. If the SCC is greater than about 1.5, the adhesive will cure quickly, but will also have low (or no) peel resistance, which is unacceptable for an adhesive sealant according to the invention.

In addition to the required range of SCC, in some cases an adhesive material with a satisfactory composition may have some other parameters, such as the stability of the mixture of components, a certain viscosity of the composition, a certain speed of curing and (or) a certain resistance to peeling.

In addition to the desired SCC, the adhesive components must also be compatible with each other in order to form a stable flowable liquid mixture. In the context of this invention, it is considered that an adhesive material is stable if it (at least two of its three main components) remains a homogeneous liquid, i.e. without visible phase separation of the components and gel formation when stored at room temperature (about 70 "Р-75 " E (21.1 "C-23.8 "C)) for up to three days.

In addition, the adhesive compound may have a viscosity of about 10,000 to about 50,000 centipoise (CP) or less when stored at room temperature or about 2,000 CP or less at about 160 "PE (71 C), and in some cases of about 200 cP or less at a temperature of about 160 "E (71 "C). In this viscosity range, the adhesive material can be applied to the film substrate by conventional printing, by roller, slot extrusion, or other applicable methods according to the requirements of the particular application.

To obtain a sufficiently cured adhesive layer on a film substrate, the adhesive material can be cured using UV radiation sources capable of transmitting energy from about 100 mgj/cm? up to about 800 mgj/sme. This in turn helps to ensure a sufficient degree of curing of the adhesive material, which when tested for abrasion resistance using MEK (AZTM 05402-06) is about 100 or more double abrasions (which is discussed in more detail below).

The average initial peel strength of a properly cured adhesive may range from about 200 g/ld (78.74 g/roll) to about 900 g/ld (354.72 g/roll), in some cases from about 280 g/ld (110.24 g/lod) to about 800 g/ld (314.96 g/lod), and in other cases from about 280 g/ld (110.24 g/lod) to about 650 g/lod (255.91 g/brom) when measured by the E method according to AZTM 03330/03330M-04.

The adhesive material is also designed to maintain its average rating

From flaking after multiple opening and closing operations (i.e. retention of adhesion). In a preferred embodiment, the cured adhesive material is capable of maintaining an average initial peel adhesion value of from about 280 g/ld (110.24 g/roll) to about 800 g/ld (314.96 g/roll) for at least five repeated uncorking cycles - repeated clogging. This is called the adhesion retention rate. In a preferred embodiment, the peel-reseal-peel adhesion retention may be from about 30 95 to about 200 95 of the original adhesion retention. The index of retention of adhesion after cracker contamination of the adhesive material can be from about 30 95 to about 150 95 of the original index, while the method of testing for cracker contamination is described below.

According to some approaches, a UV photoinitiator may be added to the adhesive to help initiate the curing process. The photoinitiator can be used in an amount from about 0.1 95 to about 5 95. According to one of the features of the invention, the photoinitiator can contain a mixture of benzophenone derivatives and a synergist compound. A synergist compound is a compound that interacts with excited benzophenone molecules, as a result of which free radicals are formed by electron transfer and hydrogen abstraction. One example is a mixture containing trimethylbenzoyldiphenylphosphine oxide, c-hydroxyketones and benzophenone derivatives, while the synergist compound contains the first two of the listed compounds.

According to another example, the photoinitiator is the c-hydroxyketone itself. According to another feature of the invention, the photoinitiator may contain onium salts or other acidic materials activated by UV radiation. A binder consisting of cationic active substances such as epoxides, vinyl esters, etc. may be used. These may optionally be cross-linked with resins functionalized with carboxylic acid, hydroxyl, or other nucleophilic groups.

In one of the options, the substrate 14 of the package can be a flexible sheet material or a film, which can consist of various polyplasts, copolymers, foil or their combinations. The film substrate can be a multi-layered extrudate (or) a layered material with structures that strengthen adhesion at the distribution boundary with the fixator 12 on the base

UV-curable adhesive material. Typically, the polymer layers may contain polyolefins such as polyethylene (high, medium, low density polymers, low 60 Kabo linear polymers) of ultra-low density, including metallocene or polypropylene (oriented (or) biaxially

oriented)); polybutylene; copolymer of ethylene and vinyl acetate (EMA); polyamides such as nylon; polyethylene terephthalate; polyvinyl chloride; copolymer of ethylene and vinyl alcohol (EMON); polyvinylidene chloride (PMOS); polyvinyl alcohol (RMON); polystyrene or their combination in single-layer or multi-layer combinations. According to one of the features of the invention, the film substrate contains EMA. According to one approach, the film substrate can have a thickness of about 0.5 mils (thousandths of an inch) to about 5 mils. Examples of applicable film substrates are provided in applications 05 2008/0131636 and 2008/0118688, the contents of which are incorporated by reference in their entirety.

According to one of the approaches, the substrate 14 of the package can be a single-layer or multi-layer film. A multilayer film according to one of the examples can have an internal thermo-adhesive (sealing) layer, to which an adhesive fastener 12 is attached and one or more structural (or) functional layers. In one particular example, the packaging liner 14 may comprise an inner sealing layer and an outer structural layer comprising one or more layers of high density polyethylene (or) one or more layers of nylon. The inner sealing layer may contain several polymers (or) mixtures of polymers.

According to one approach, the package liner 14 and/or the inner sealing layer may contain blends of ethylene vinyl acetate (EMA) copolymer, polyethylene (such as linear low density polyethylene (LDPE)) and dispersed particles of one or more optional adhesion enhancers fillers, which will be described in more detail later.

For example, the inner sealing layer may contain from about 60 95 to about 80 95 EMA, from about 5 95 to about 20 95 polyethylene, and from about 3 95 to about 15 95 particles of an adhesion-enhancing filler or filler composition that contains particles. Such a structure can form a polymer dispersion, in which the EMA can be the primary or continuous phase, in which the dispersed phase contains polyethylene and a filler/composition that fills. According to this approach, an adhesive-based retainer 12 is applied to the inner sealing layer forming the inner surface of the package 10. According to another approach, the multi-layer film may contain multiple layers, with about 85,906 of the total film thickness being HDPE and about 15 95 per sealing layer.

According to another approach, the substrate of the package can be paperboard or similar material with a coating or polymer layer applied to it. The coating or polymer layer may contain a copolymer of ethylene and vinyl acetate (EMA), polyethylene and their mixtures. This coating or layer may contain the fillers described above, as well as fillers contained in the carrier based on maleic anhydride-grafted linear low-density polyethylene (MA-GG OPE), described below.

In one embodiment, the substrate 14 of the package includes a structure to enhance the primary adhesion force or adhesion at the interface between the adhesive material and the substrate 14 of the package. To this end, according to one of the approaches, the package substrate may contain particles of an adhesion-enhancing filler mixed with at least part of the substrate 14 of the package, such as, for example, particles of an adhesion-enhancing filler mixed with the inner sealing layer of the film described above. According to one of the approaches, particles of reinforcing adhesion of the filler can be micro- or nano-particles of clay, calcium carbonate, montmorillonite, microcrystalline silica, dolomite, talc, mica, oxide (silicon oxide, aluminum oxide, titanium oxide, etc.) and other additives and/or combinations thereof, forming a mixed at least internal sealing or surface layer(s) of the packaging substrate to increase the initial force of adhesion of the adhesive fastener 12 to the substrate 14 of the package. In particular, organoclay is used, and in one embodiment, organoclay is organomodified montmorillonite or, in some cases, layered organoclay. An organoclay is a subjected organically modified natural clay, such as montmorillonite clay, which has been treated or purified with surface-active materials such as quaternary ammonium salts. Montmorillonite belongs to the phyllosilicate group of clay minerals and usually contains hydrous sodium-calcium-magnesium aluminosilicate. Without being bound by any limiting theory, the organoclay-filled liner, and in particular the organomodified fillers, can contribute to effective re-closable adhesive-based closures that do not peel away from the package liner 14 after uncorking.

According to some approaches, the applicable adhesion-enhancing filler particles have a specific surface area greater than about 100 m2/gram and an aspect ratio greater than about 10. According to other approaches, the organoclay used in the sealing layer usually contains many particles. In one embodiment, the organoclay contains a plurality of particles having at least one spatial dimension of less than about 200 nm. In another embodiment, the organoclay contains a plurality of particles having at least one spatial dimension of less than about 100 nm. In yet another embodiment, the organoclay contains a plurality of particles having at least one spatial dimension of less than about 50 nm. In another embodiment, the organoclay contains many particles having spatial dimensions greater than or equal to about 1 nm. In another embodiment, the organoclay contains many particles having spatial dimensions greater than or equal to about 5 nm. In another embodiment, the organoclay contains plates with an average distance between them of at least about 20 angstroms. In another embodiment, the organoclay contains plates with an average distance between them of at least about 30 angstroms. In another embodiment, the organoclay contains plates with an average distance between them of at least about 40 angstroms. Usually, before mixing with a thermoplastic polymer, the organoclay contains plates, the average distance between which is from about 20 to about 45 angstroms. After mixing with the substrate or at least with its sealing layer, the organoclay mainly goes into a dispersed state, as a result of which the average distance between the particles is preserved or in some cases increases.

Effectively dispersing clay particles or other adhesion-enhancing fillers in the polyethylene and EMA used in the sealing layer can be challenging due to the incompatibility of clay-based fillers and some polymers. Thus, the use of particles of an adhesion-enhancing composition containing a filler mixed with a compatible carrier contributes to the mixing and dispersion of the filler in the sealing layer of one of the forms of the substrate 14 of the package. According to one of the approaches, the particles of the reinforcing adhesion of the filler can be kept in a carrier based on maleic anhydride-grafted linear low-density polyethylene (MA-I HORE). According to another approach, the carrier can be a mixture of MA-I GORE and unmodified polyethylene. Without being bound by any limiting theory, the maleic anhydride contained in the carrier has an affinity for filler particles such as clay, and the polyethylene contained in the carrier is well miscible with other polyethylene and ethylene-like polymeric components of the sealing layer or lining 14.

Filling compositions based on clay are produced, for example, by the RoiYuOpe Sogrogayop company

Zo (Avon Lake, Ohio, USA). Without being bound by any theory, it is assumed that organomodified clay particles, which can be highly polarized, and/or a polymer carrier based on maleic anhydride-grafted linear low-density polyethylene (MA-

GSORE), contained in clay-based fillers, contribute to the adhesion of the cured adhesive coating to the surface of the substrate by increasing the surface energy of the substrate layer.

In addition, it is also suggested that at the microscopic level, particles of clay or other adhesion-enhancing fillers can increase the surface roughness of the substrate and thereby positively affect the coefficient of friction of the substrate and increase the available surface area of contact between the substrate and the adhesive material, resulting in an increase in the number of areas of chemical (or) mechanical coupling. This will be discussed in more detail with reference to fig. 8. According to one approach, it is assumed that the filler composition, which is contained in the sealing layer in an amount of from about 0.5 95 to about 20 95 by weight, favorably affects the primary adhesion force of the adhesive fastener 12 to the substrate 14 of the package in such a way , that the initial force of adhesion to the substrate exceeds the adhesion when peeling off the adhesive layers 30 and 32, and the fastener 12 does not peel off after opening.

In addition, the filler or particles can roughen the surface of the substrate layer so that it can slide freely on the metal surfaces of the packaging equipment without sticking to them, which allows to reduce or eliminate the use of a slip-enhancing additive in the film.

According to some approaches, the inner sealing layer holding the filler has a higher degree of surface roughness, such as an average roughness of about 1500 angstroms to about 5000 angstroms. The sealing layer may also have a higher tensile modulus than unfilled layers. According to some approaches, the inner sealing layer has a tensile modulus of about 500 to about 2000 MPa.

An optional component of the substrate 14 of the package may contain a migration additive that improves sliding, which helps to reduce the coefficient of friction between the film and other surfaces, due to which the substrate can slide freely on metal or self surfaces. According to one of the features of the invention, a slip-improving additive based on erucamide (that is, a primary amide of unsaturated fatty acids) can be used. In films known from the state of the art, slip-improving additives are used in large quantities of 60 from 2000 parts/million. up to 7,000 ppm, however, it was found that at such a high content, the adhesive material 12 had difficulty adhering to the low-energy film surface because the slip-enhancing additive blocked areas of the surface where adhesion could occur. However, due to the use of a filler, the amount of slip-enhancing additive used can be significantly reduced, for example, to a level of less than about 1000 parts per million. In other cases, the film contains less than about 700 ppm. slip-improving additive or in other cases does not contain a slip-improving additive.

Since due to the use of the filler, the coefficient of friction between the film and other surfaces is reduced, that is, the effect that was previously achieved due to the use of a slip-improving additive is provided, the slip-improving additive can be used in a lower concentration or not at all. Due to the use of a slip-enhancing additive in a smaller amount than usual, it is also possible to strengthen the adhesion of the cured coating to the substrate, both initially and over time, since the amount of additive that interferes with the adhesion of the coating to the substrate is reduced. Without being bound by any limiting theory, it is believed that the fatty acid amides contained in slip-enhancing additives, which are low molecular weight components, are capable of migrating to the film surface, affecting the bond strength between the film surface and the adhesive fixative 12. Although by treatment corona discharge or flame treatment can first burn off any fatty acid amides on the surface of the film and thereby provide the initial high adhesion strength of the adhesive material, later additional fatty acid amides can migrate to the surface of the film, resulting in reduced adhesion strength during long-term storage. In addition, large amounts of slip-enhancing additives can also migrate to the surface areas of the adhesive material, which can negatively affect the strength and strength of the bond between them.

In addition, before applying the adhesive material to the substrate 14 of the package, the surface of the substrate can be subjected to preliminary treatment in order to increase the surface energy (or) apply a primer layer. For example, surface treatment may include corona discharge treatment, plasma treatment, flame treatment, etc., or chemical coatings such as primers or adhesion enhancers may also be used. Corona treatment can increase the surface energy of the substrate, thereby improving the coating's ability to adhere and remain attached to the substrate. Preliminary processing

Corona discharge can include an ion cloud treatment that oxidizes the surface and makes it susceptible to coating. As a result of preliminary treatment with a corona discharge, oxidation of the reactive areas of the polymer substrate mainly occurs. In the case of corona treatment, ideally the surface energy after treatment should be about 36-40 dynes/cm2 or more at the time of coating.

Without being bound by any theory, it is believed that corona treatment of the substrate surface helps to provide a strong bond between the coating layer and the substrate surface due to an increase in the surface energy of the substrate. In addition, the corona discharge treatment in combination with a low concentration of slip-enhancing additive and the use of a filler composition in the film substrate 14 provides a strong bond between the resealable retainer and the substrate.

Regarding the coating method, the liquid coating compound may be heated to a temperature of from about 86°F (30°C) to about 190°F (88°C), preferably from about 120°F (49°C) to about 160 "PE (71 "C) in order for it to have a sufficiently low viscosity for coating the substrate 14 of the package by the method of screen flexographic printing, rotary gravure printing or slotting. As noted above, the package liner 14 may contain a filler dispersed therein (at least in some areas or layers) and a slip-enhancing additive in an amount of less than about 1000 parts per million contained in the polymer film liner. After the liquid compound is applied to the substrate, it can be cured by UV radiation, resulting in a solid resealable adhesive retainer. According to one of the features of the invention, ultraviolet radiation (radiation with a wavelength from about 10 nm to about 400 nm) can be used with a radiation energy from about 100 mgj/cm2 to about 800 mgj/cm2, in other cases from about 400 mgj/cm- to about 730 mgj/cm-.

As shown in the following examples, it has been found that UV curing is desirable because other forms of curing (such as electron beam curing) generally do not provide the desired adhesion and delamination in the above described SCC range. According to one of the features of curing by UV radiation, a photoinitiator containing a mixture of benzophenone derivatives and a synergist compound can be used in the coating composition, as a result of which free radicals can be formed. In polymerization systems initiated by free radicals, the curing reaction stops when the UV radiation source is turned off. One of the alternatives to UV curing is cation-initiated polymerization. Cation-initiated polymerization systems that use photoinitiators such as onium salts or other UV-activated acid catalysts to crosslink epoxies or vinyl esters differ from free-radical-initiated systems in that the curing reaction continues even after the reaction has stopped. sources of UV radiation.

As mentioned above, the resealable adhesive-based fastener 12 generally has a peel resistance or adhesion force that allows the opposing layers 30 and 32 to engage with each other to seal or reseal the package 10. For example, to seal or seal the package, a consumer can press (as shown by arrows 33 in Fig. 4) two opposite layers to each other, which are shown pressed to each other in Fig. 5B. According to one approach, the adhesion between the adhesive layers 30 and 32 is generally sufficient to connect the layers 30 and 32 to each other, and in some cases to hermetically seal them. It is understood that in the context of this invention, the term hermetic seal means a generally airtight seal. In one example, the selected self-adhesive material (SCM) forming layers 30 and 32 may have an initial strength or peel strength of from about 200 g/in (78.74 g/cm) to about 900 g/in (354, 72 g/cm) (or grams per linear inch, g/ld), and in some cases from about 200 g/in (78.74 g/cm) to about 400 g/in (157.48 g/cm) when measured by E according to AZTM 03330/03330М-04; however, the resealable retainer 12 may have different peel resistance values depending on the specific application or specific measurement method. According to one of the features of the invention, the best resistance to peeling is from about 280 g/ld (110.24 g/lam) to about 800 g/lm (314.96 g/lam). A higher peel resistance (ie, greater than about 900 g/ld (354.72 g/lo)) is generally excessive for some packages used as resealable packages, since cohesive bonds breaking in such large values of peeling resistance may damage the substrate. The selected SCM can also have adhesion strength at the next peeling (preserving adhesion).

Preferably, after five opening/capping operations, at least about 200 g/ld (78.74 g/lom) or in other cases at least from about 30,956 to about 200,95 first peel adhesion values, and at least from about 50 g/in (19.69 g/cm) to about 200 g/in (78.74 g/cm), with the subsequent peels being cap-re-caps performed after the initial opening of the package 10 and separation of the re-capable retainer 12.

The adhesive-based retainer 12 also preferably has a relatively low tackiness, which minimizes and preferably limits adhesion of the retainer 12 to unwanted materials (ie, contamination) and to surfaces such as food particles, forming equipment surfaces, rollers, and etc. According to one approach, the adhesive material may have an adhesion to undesirable surfaces not exceeding about 5 lb/sq. in. (0.4 kg/sq. cm) with a preload of about 4.5 lbs. according to ATM Tack Test Method 02979. According to another approach, an SCM coating may have a tack rating not exceeding about 15 lbs./sq. in. (1.1 kg/sq. cm) with a preload of about 10 lb. (4.5 kg). However, the stickiness index can also vary depending on the specific SCM and its application, as well as the measurement method used. According to another metric, the tackiness of the adhesive-based retainer 12 is measured using a modified version of the A5TM 03121 rolling ball test, wherein the adhesive material has a tackiness at which the ball travels a distance of about 1T inch (2.5 cm) to about 8 inches (20.3 cm). In some cases, the distance traveled by the ball is up to about 14 inches (35.6 cm).

Modified test 03121 is further explained below and in the examples.

Even with such relatively low tackiness values relative to undesirable surfaces, the adhesive layers 30 and 32 still have a sufficiently high initial adhesion force to the substrate 14 forming the front and rear members 16 and 18, as a result of which the adhesive layers 30 and 32 are preferably not peeled from it when opening the package 10. According to one of the approaches, the primary force of adhesion of the adhesive layers 30 and 32 to the substrate 14 of the package at their border 38 generally exceeds the inherent resistance to peeling of the cohesive material. For example, the selected binder material has an initial peel resistance from the film substrate forming the front and back elements 16 and 18, which exceeds the peel resistance of the layers 30 and 32, ate 60 is generally more than about 600, in other cases about 900 g/ inch (354.72 g/cm). In some other cases it is greater than about 1000 g/in (393.70 g/cm), and in some cases it is greater than about 1200 g/in (472.44 g/cm). In other cases, the initial peel resistance can be from about 600 (236.22 g/cm) to about 1200 g/in (472.44 g/cm) (in some cases from about 600 (236.22 g/m) to about 900 g/ld (354.72 g/lom)).

However, the peel resistance can also vary depending on the substrate 14, SCM, and other factors.

In addition, it is further contemplated that the interfacial, mechanical or chemical adhesion of the adhesive materials 30 and 32 to the substrate 14 may be enhanced by the particular structures of the substrate materials 14 to increase the surface energy of adhesion, as generally described above. As mentioned above, the substrate 14 can be a single-layer or multi-layer film, in which case it is desirable that at least the inner layer of the film substrate 14, forming the front and rear elements 16 and 18, consists of a mixture of polymers containing a copolymer of ethylene and vinyl acetate (EMA ) and linear low-density polyethylene (HOPE). If an additive or adhesion-enhancing filler particles are also used, they are preferably dispersed in at least this inner layer (i.e. the inner layer of the GORE ENAMEL mixture). In a preferred embodiment, the EMA is the predominant component of the mixture and is contained in an amount of from about 65 95 to about 90 95 and the GH OPE is a minor component and is contained in an amount of from about 595 to about 2595. In a preferred embodiment, the substrate, the inner layer and/or the layer from the EMALIGORE mixture have low concentrations of slip-improving additives (which are usually added to the substrate to obtain a coefficient of friction applicable to processing the substrate on forming-packing-capping machines). It should be taken into account that such additives may contain certain amounts of fatty acid amides, while it was found that such compounds can affect the strength of adhesion of binder materials to the substrate. Accordingly, according to one approach, the substrate 14 may contain less than about 1000 ppm. fatty acid amides (i.e. slip-enhancing additives) dispersed in the inner layer or in some cases throughout the substrate 14.

Without being bound by any limiting theory, as mentioned above, it is believed that fatty acid amides, which are low molecular weight components, are able to migrate to the surface of the substrate, affecting the strength of the bond between the surface of the substrate and the binder materials. Although corona treatment or flame treatment may initially burn off any fatty acid amides on the substrate surface and thereby provide an initial high adhesion strength to the SCM, additional fatty acid amides may subsequently migrate to the substrate surface, resulting in reduced adhesion strength over the long term. storage. Thus, it is desirable to reduce the content of fatty acid amides in the substrate (in the inner layers or in the entire substrate) to a level of about 1000 parts per million, at which both a high initial adhesion strength and a high long-term adhesion strength are ensured, since later on the surface of the substrate a very small amount of these impurities migrates.

As an alternative, variations in the composition of the substrate can also be used in combination with other methods of surface treatment (corona discharge treatment, plasma treatment, fire treatment, etc.) or other coatings depending on the requirements of the specific application.

According to one approach, a polyethylene-based film from about 0.5 mil to about 5 mils thick, in some cases about 3 mils thick, can be used as the flexible films forming the front and rear elements 16 and 18. In fig. 8 illustrates one possible flexible film forming the front and rear members 16 and 18, which is a multi-layer co-extruded film having a structural base of one or more layers (two shown) of high density polyethylene 702 (HOPE), and an inner or an adhesive receiving layer (such as the sealing layer described above), which is a thermally bonded layer 704 of ENAMEL ORE, filled with particles 706 of reinforcing adhesion of the filler. According to this approach, the adhesive fixative 12 is applied to the inner heat-bonded layer 704 of ENAMEL. ORE, which forms the inner surface of the package 10.

As shown in fig. 8, the sizes of the particles 706 of the adhesion-enhancing filler, which may be an organoclay, are generally exaggerated for clarity, but it is assumed that they are dispersed in the inner or sealing layer 704 of GORE ENAMEL and that at least some of the particles of the adhesion-enhancing filler (indicated by the position 708 in the drawings ), for example, may at least partially extend or protrude outward from the outer surface 710 of the GORE ENAMEL layer 704, as generally described in application 12/435768, the entire content of which is incorporated by reference in this application. Alternatively, the adhesion enhancing filler particles may not be exposed to the surface 708, but may form a rougher outer surface, thereby increasing the surface area for adhesion to the adhesive material. Without wishing to be bound by any limiting theory, particles of adhesion-enhancing filler 708 that surface or protrude outwardly from the surface, in conjunction with corona discharge treatment and/or the use of certain filler carriers, may facilitate adhesion of the retainer to the substrate, as whereby an effective initial bond strength to the substrate can be provided that exceeds the peel bond strength of the two adhesive layers 30 and 32. In general, when the peel bond strength of the two adhesive layers 30 and 32 is less than about 600 g/in (236 .22 g/cm) to about 900 g/in (354.72 g/cm), there is no delamination of the retainer and liner during repeated peel/reseal cycles when using the described fillers and sealing structures. Thus, the primary bond strength of the adhesive layers 30 and 32 to the substrate containing the adhesion enhancing filler particles 706 is greater than about 600 g/ld (236.22 g/roll), in some cases greater than about 900 g/ld (354.72 g /lom), as described above.

In other cases, and without being bound by any limiting theory, an increase in the primary bond strength between the adhesive material and the substrate may occur due to the diffusion of the liquid or uncured adhesive material into the gaps, voids, or other spaces between the particles of the adhesion-enhancing filler (such as interstices between the plates of organoclay) and, in particular, in these gaps, voids or other spaces between the particles of the filler, they at least partially reach the surface of the substrate. As a result of the subsequent polymerization, the liquid adhesive material that has diffused is converted into a solid adhesive material that can be connected, bonded, or otherwise bonded to the particles of the reinforcing adhesion filler to increase the initial bond strength to the substrate. In other cases and also without connection with any theory, the increase in the primary adhesion force can also occur due to the affinity of the polar adhesive areas to the polar particles of the filler. In general, the filler particles have a greater polarity than the substrate and, therefore, provide a stronger adhesion to it.

Due to the use of a fixative based on an adhesive material and the described substrates, a resealable fixative based on an adhesive material can be obtained, capable of

To be repeatedly opened and closed without delamination from the opposing areas 16 and 18, which is stable over time and provides generally repeatable results even after contamination by foreign materials such as food crumbs. Even when the fixative based on an adhesive material is contaminated with food crumbs or edible oil, the fixatives based on the adhesive material proposed in the invention do not lose their cohesive properties, which makes them unsuitable for use.

According to one approach, the adhesive fasteners of the present invention maintain a peel strength of adhesion or autohesion when contaminated with product, food crumbs, oils, etc. from about 50 g/inch (19.69 g/cm) to about 900 g /inch (354.72 g/cm) and have a residual tack or adhesion strength after soiling of at least about 20 95, in some cases from about 30 95 to about 150 95 peel strength prior to soiling. In the context of this invention, residual adhesion or adhesion strength is expressed as a percentage of the resistance to peeling after direct contact of the surface of the adhesive material with food particles relative to the resistance to peeling of a clean or uncontaminated fixative.

A resealable retainer can be obtained that can be delaminated and resealed at least 5 to 10 and preferably more times, while retaining low tack and resealable properties. In addition, after mutual contact of the surfaces of the resealable retainer, it is capable of again exhibiting all or some of its original peel resistance values. Depending on the final composition of the used adhesive coating, the resealable fastener is able to restore its resistance to peeling already with a two- to three-minute interval between uncorking and resealing cycles. However, in some cases shorter or longer time intervals between uncapping-recaking cycles may be required to restore peel resistance. In some cases, the peel resistance of a reclosable retainer can actually increase with prolonged contact between opposing adhesive layers.

As shown in fig. 4-5B, in order to close the package 10, the user, with the help of his fingers (or the machine in the closing stage during the operations of filling the packages) squeezes the front and back members 16 and 18 in the direction of the arrows 33, as shown in FIG. 4 to engage the opposite adhesive layers 30 and 32 and create a cohesive bond between them and thereby hermetically close the package 10. To open the package 10, the user or the machine separates the sections 56 of the package (Fig. 5B) located above the retainer 12, in opposite directions 57 to separate the adhesive layer 30 from the adhesive layer 32. According to one approach, the layers 30 and 32 are designed for repeated capping and re-capping, and in some cases the layers 30 and 32 preferably have sufficient structural integrity and integrity with the connection for corking and uncorking from about 5 to about 10 or more times. However, specific layers and packages may be designed to uncork and seal any number of times, depending on the specific configuration, weight of the coating, and other parameters of the cohesive layers and packaging substrate.

The package 10, containing the resealable latch 12, can be used to store a wide variety of food and non-food products. Foods that can be stored include snack foods such as dried fruit and nut mixes, nuts, seeds, dried fruits, grains, cookies, crackers, chocolate, treats, etc. Package 10 can also be used to store beverages, cheese, cereals, ground coffee, desserts, pet food, etc. Other possible applications of the package 10 may include the packaging of various products that benefit from resealability and the ability to be opened multiple times. These may include non-food items such as potting soil, sandwich bags, first aid kits, nuts and screws, stationery, cleaning products, laundry detergents, disposable tableware and utensils, CDs (or) UMO- discs, toys, sculpting kits, kits for decorative and applied arts, electrical kits, etc. Of course, many other examples are possible.

The described adhesive retainer can also be used outside of packaging, for example, in the case of consumer goods that require a reusable retainer.

For example, an adhesive fastener can be used as a fastener for disposable diapers, a fastener for sports shoes, a fastener for outer clothing fasteners, a fastener for pockets or items of clothing, a fastener for office or school supplies such as staplers and folders, a fastener for camping tents or backpacks, as repositionable labels or tags on stands and cards for teaching aids/school teaching materials, a holder for arts and crafts such as

From scrapbooks, a repositionable retainer for board game sets, or a repositionable, easy-to-apply and remove fastener for tying goods in transit.

Consider fig. 6 and 7, which illustrate an example of a suitable process 500 that can be used to coat a substrate with a reclosable retainer 12 positioned thereon. The layers 30 and 32 can be applied to the substrate 14 by solution coating, printing, gravure printing, or flexographic printing. printing

It should be taken into account that depending on the requirements of a specific application, other coating methods can also be used. According to this approach, the substrate with the sealing agent located on it can be a film in the form of a roll, which is then fed to forming-packing-capping machines to form the package.

In this example process 500, the substrate 14 may be used in the form of a roll 502 of carrier film, which may be a single-layer or multi-layer film containing ORE ENAMELS as an inner layer 504 on which adhesive materials will be applied. The film is then unwound and directed to the first coating area 506, where an adhesive fixing layer can be applied to it. For example, a liquid adhesive mixture may be applied to a first gravure roller or drum 510, which feeds the liquid SCM to a second or printing rubber roller or drum 512 on which an image or imprint 514 corresponding to the configuration, size, and shape of the adhesive strip applied to the film A second drum 512 feeds the SCM onto a moving film substrate, thereby forming a first strip of SCM containing material 516 on the web. The liquid SCM can have properties such as a viscosity of about 10,000 cP to about 50,000 cP at room temperature (20-25,750) and less than about 2,000 SP at a temperature of about 70-75 C. Liquid SCM coatings are preferably applied at a temperature of about 160 "E (71 "C), but also from about 86 "E (30 "C) to about 190 "E (88 7).

After passing through a rough drying section 520 (which may be used for moderate heating to aid in spreading and leveling the coating), the web 14 may be directed to a UV curing section 521 to cure the applied fix layer. Site 521 may use ultraviolet radiation with a wavelength of about 10 nm to about 400 nm and an energy 60 dose unit of about 100 mgj/cm? to about 800 mgj/sme-, and in some cases from about 400 mgj/cm2 to about 730 mgj/cm-. After curing, the liquid layer of the coating forms a solid adhesive fastener 12 on the substrate 14 of the package. Then, if applicable to the particular shape of the substrate 14, the substrate 14 may be wound into an intermediate roll 522 for storage or transfer to the next section of package formation, such as the form, fill and seal process 600, generally illustrated in FIG. 7.

Consider fig. 7, which illustrates one example of a forming-packing-capping machine 600, in which the intermediate roll 522 obtained as a result of one of the forms of the process 500 (which can be divided or cut into strips of the appropriate size before the implementation of the process 600) is used to form one of the examples of hermetic package 602. This example uses a vertical packaging or flow wrapping process in which the substrate 14 is rotated around the filling tube 604. A first longitudinal weld 607 can be formed using the first heat welding unit 606. Then, the second and third transverse welds 609 and 611 can be formed using the second transverse heat welding unit 608 with an integrated finishing tool. As shown in FIG. 7, the seam 609 is below the adhesive resealable retainer 613 created as described above, but the seam 609 can also be made above or both above and below the adhesive resealable retainer 613. Finally, with the help of the integrated in the assembly 608 for the transverse heat sealing of the finishing tool, the liner 14 can be cut between the adhesive resealable retainer 613 and the bottom seam 611 of the adjacent package to thereby separate the package that has already been filled and sealed from the next package that is in the process of being filled. It is worth considering that illustrated in fig. 6 and 7 processes are only examples of applicable ways of forming and/or filling packages having a resealable retainer 12 based on a UV-curable adhesive material. Depending on the requirements of the specific application, other methods may also be used.

The coating compositions used to form the resealable retainer 12 based on the UV curable adhesive material may optionally contain one or more additives or inert dyes to alter the appearance of the retainer 12.

For example, according to one of the approaches, the fixator 12 may contain titanium dioxide. Such optional additives may facilitate the recognition of bands of adhesive material in opposing areas due to less permeability of the adhesive material and thereby facilitate easier reocclusion of the retainer, as the consumer will be able to more easily detect opposing bands of the retainer.

According to some features of the invention, the package may be created by method 800

Cabo) method 900, which are generally illustrated in fig. 9 and 10. According to one approach, as generally shown in FIG. 9, in step 802, a low tack adhesive material having the configuration described above is applied to the package substrate in accordance with the appropriate stencil in order to place the adhesive-based retainer 20 thereon. Then, in step 804, the low-tack adhesive material is cured on the packaging substrate, for example, by UV curing. After the adhesive-based retainer 20 has been applied and cured, at step 806 the substrate may be formed into a package 10 of a particular design, which may have any applicable shape, including the shapes shown in FIG. 1-3. After the package 10 is formed, it can be filled, for example, with food products, etc. Alternatively, in some cases, the package can be formed first and then an adhesive material can be applied to it.

In fig. 10 shows a method 900 based on another approach for making a substrate applicable to the formation of a more rigid package such as that shown in FIG. ZA-Z3U. First, at step 902, graphics, coatings, layers, and/or alphanumeric markings are applied to various internal or external surfaces of the substrate, such as paperboard, etc., by printing or other means. At this stage 902, the substrate may also be coated with a topcoat, polymer coating, etc., as described above. The top varnish layer or coating may contain the filler described above, if it is necessary to strengthen the adhesion of the adhesive material to the package. This may be done by any applicable method, including, for example, slot coating, flexographic printing, or gravure printing. The printed and/or applied coating is then dried in step 906, whereby a low tack adhesive material such as described can be applied to the substrate by an applicable method such as slot coating, flexographic printing and gravure printing, etc. above. The low-tack adhesive material 60 is then cured in step 908. After curing, the substrate is cut in step 910 into one or more blanks or other packaging structures using any applicable means, such as one or more punches, rotary dies, lasers, and etc., and save for future use. When the blanks are to be used, they are fed to the packaging line at step 912 . Alternatively, the blanks can be formed on the packaging line itself. At stage 914, the package of the desired shape 914 is formed on the packaging line by bending the blank along different fold lines, applying a durable adhesive material to the overlapping areas, and their connections to each other. Once the package is created, it may be filled in step 916 with one or more products, such as food products, and sealed for further storage, transportation, and display. Then, in step 918, the filled packages are wrapped with cling film, and in step 920, they are placed with the other wrapped packages in a sealed outer general bag or package. In step 922, a plurality of outer generic bags or packages are placed into one or more cartons and shipped to a consumer, retail store, merchant, etc. Alternatively, a low-tack adhesive material may be applied at a later stage in the process, such as after step 922 910 punching, after stage 914 forming and/or after stage 918 filling depending on the requirements of the specific application.

According to another approach, the low-tack resealable adhesive materials described may have substantially the same tack (or at least perceived tack) and/or surface energy as a substrate without using a low-tack adhesive. For example, a reclosable adhesive material with low tack when touched by the consumer may have substantially the same tackiness index, or at least a perceived tackiness index, as the uncoated substrate or adjacent film. According to one approach to demonstrate this, the rolling ball tack test can be used, which results in substantially the same values for the low tack adhesive and the uncoated film. For example, in the rolling ball tack test (described above in the examples) of a low tack adhesive, the ball may travel about 14 inches (35.6 cm). In the stickiness test with a rolling ball, films without

From the cover (ie, without the adhesive material), the ball can travel 16-17 inches (40.6-43.1 cm) (on average). In some cases, the values obtained from the rolling ball tack test of the low tack adhesive may be only about 12-17 95 below those of the uncoated film.

According to other approaches, the surface energy of the adhesive material with low tack, which may be substantially the same as that of the uncoated film, can be used to demonstrate the similarity of the surfaces of the adhesive material and the uncoated film. According to one approach, for example, the surface energy of the low-tack adhesive material m the uncoated film may in both cases be from about 3b to about 38 dynes/cm" and in other cases about 36 dynes/cm-".

The advantages and embodiments of the retainer and package described in the invention will be further illustrated by the following examples; however, the specific conditions, processing patterns, materials and amounts thereof given in these examples, as well as other conditions and details, should not be interpreted to unreasonably limit the fixative, packaging and methods. All percentages are by weight unless otherwise noted

Examples

Example 1

Compatibility and stability during storage (stable is a mixture that does not form a gel and does not have visible signs of separation after storage for up to 3 days at room temperature) of various mixtures of acrylic oligomers that regulate the stickiness of substances and elastomeric materials were tested. Further, Table 1 lists the combinations tested and the compounds used

Table 1

Adhesive compounds tested for stability 17711111 Componentized in the final adhesive compound/-:/ /( |/

Acres Correlation Reinforcement Reinforcement IReinforcement Resistance - |Elasto- Elasto- i t.s. vyy mer vach mer vach vach | sticky of a liquid mixture of oligo stickiness stickiness | stickiness |components during storage measures (SKK) same ke ||: spe sample after 3 days

Stable, without 1 (a 40 15 45 067 noticeable wine: ; gelation, without flow) and phase separation 2 Stable, but without (Comparative 15 45 40 curing due to the nyal) too low SCC

C Unstable due to (Compar-.| 40 45 15 0.67 | phase separation; nYal) components were incompatible 4 Unstable, due to (Compar- 45 15 40 phase separation and too nYal) low SCC

Stable, without noticeable (due to wine-| 40 15 25 20 0.67 gelation, no flow) and phase separation into Unstable, due to (Poriv-.| 40 15 45 0.67 | phase separation; nYal) components were incompatible (according to iv- 40 15 Unstable, due to tsar) division of phases

Unstable due to the formation of a (comparatively 40 gel-like) structure and too low SCC

The following components were used:

A - acrylic epoxidized soybean oil (CM 111 05, Sotrapu, Exton, Pennsylvania, USA).

B - methacrylic polybutadiene (KisskKukf 3500, Zapoteg Sotrapu).

C - aliphatic acrylic oligomer with increased stickiness (CM 3001, Zapoteg Sotrapu).

This component is a mixture of aliphatic urethane acrylate and tackifier hydrocarbon polymers. p - copolymer of styrene and butadiene (Kisop 184, Zapoteg Sotrapu).

E - aliphatic urethane acrylic oligomer with increased stickiness (CM 3211, Zapoteg

Sotrapa).

E is a stickiness-enhancing concentrate obtained from a light aromatic polymer with a weak odor (RKO 11236, Zapoteg Sotrapu).

The ratio of adhesive - (95 by mass of acrylic oligomer) materials (SKK) (95 by mass of elastomer -- 95 by mass of stickiness enhancer)

The stability or compatibility of these adhesive components may depend on the method of manufacture, transportation, in-plant storage and application of the liquid coating mixture. Stability was assessed visually based on the appearance and homogeneity of the observed compound after storage for three days (about 72 hours).

It was noted that Samples 1, 2 and 5 of Table 1 were visually satisfactory mixtures of various adhesive components that remained homogeneous after 3 days, ie there was no visible separation of components or gelation. Although Sample 2 had a stable compound, this adhesive component had an undesirable CCM and lacked adequate cure (as seen in the MEK abrasion cure test results below in Table C for Sample 10 with a similar composition). However, Samples 1 and 5 were stable adhesive mixtures with adequate curing, as well as the required SCC in the range from 0.5 to 1.5. Phase separation occurred in other mixture samples, they became too thick (or) gel-like (Sample 8 became gel-like after 3 days). Sample 8 formed a gel, which is a sign of incompatibility of the composition formed by the aliphatic acrylate or component

E in combination with the stickiness enhancer E

Thus, in order to obtain a stable adhesive material suitable for use in the present invention, the stable adhesive material must generally satisfy one of the following, in some cases several of the following, and in other cases all of the following conditions: contain compatible components, have a desired ratio of curable adhesive components and contain all three components (i.e., acrylic oligomer, elastomer, and tackifier).

Example 2

Based on the initial results of the compatibility of adhesive materials for stable compounds with

Example 1, these compounds were further refined, resulting in five compounds of adhesive coatings, which in all cases remained stable for at least 24 hours as a mixture of components indicated in Table 2.

Table 2

Specified adhesive compounds 77771111 bbcomponent of the final adhesive compound /-:/ (

Acrylic- I will strengthen- I will strengthen- | Reinforce- Correlation Stability and Elasto- Elasto- adhesive vy mer vach mer vach vach components through 24 oligomers stickiness stickiness | stickiness (SKY hours ke x 81505151 110 of the sample 91 40 | 15 | 45 | - | - | - | 067 | yes.0/ lo IYI - | 715 | 45 | - | 40 | - | o | yes.0Ш 1 40 | 15 | h | - | - | 25 | 067 | yes .0sh/

Components A-P are components from Example 1 above. Samples 9 and 10 correspond to Samples 1 and 2, respectively, from Example 1. Sample 11 is a variation of Sample 5 from

Example 1. Other samples had new compounds.

After all five adhesive compounds showed good compatibility for at least one day, about 1 95 photoinitiators (Ezasyge? KTO 46, I atbregia Zra, Igalia) were added to all five samples and then subjected to additional testing. The photoinitiator consisted of a liquid mixture of trimethylbenzoyldiphenylphosphine oxide, α-hydroxyketones, and benzophenone derivatives.

The samples were then applied to film substrates containing ethylene-vinyl acetate copolymer (EMA), metal-organic linear low-density polyethylene (MLDPE) and about 12 95 organoclay-based composition (containing about 57-63 95 organomodified clay and a carrier based on grafted with maleic anhydride linear low-density polyethylene,

RoiuOpe Sogrogaiiiop, McHenry, Illinois, USA). In particular, the substrate contained about 77 95 by mass (EMA), about 10 95 by mass of organometallic and GORE and about 13 95 by mass of composition based on organoclay. After applying the samples to the film substrate, they were subjected to curing using ultraviolet radiation for three passes under a U-lamp, which is a lamp with mercury and iron halide compounds. One passage under the O-lamp corresponded to irradiation with an energy of approximately 75 mgj/cm? up to 100 mgj/cm". After curing the coating, the degree of curing of the adhesive layer and the effectiveness of adhesion to the film were evaluated.

The degree of curing of the adhesive was evaluated by a solvent abrasion test method known as the Methyl Ethyl Ketone (MEK) abrasion test method according to ABTM 05204. A good indication of curing according to the results of the MEK abrasion test is 100 or more double abrasions, which indicates that the adhesive material has been properly cured and is therefore resistant to abrasion using MEK.

Poorly cured adhesives did not have high abrasion resistance using MEK (eg, 10 or fewer double abrasions). The results of the MEK abrasion test are shown below in Table 3.

Stickiness and resistance to initial peeling of adhesive materials, which were evaluated subjectively, were also investigated. The stickiness of the adhesive layer was examined by touching it, and the level of stickiness was evaluated on a rating scale including low (I), medium (M) and high (H) levels. Similarly, the subjective effort required for manual layering of samples was also assessed on the Y, M, and H scale. The test results are shown in Table 3.

Table C

The results of the test for curing and initial adhesion of the compounds from Table 2

Abrasion test Subjective Subjective

Specimen Number MEK (Number of Duplicates for Abrasion Test) Peel Stickiness (Invention) (Comparative) (Invention) (Comparative) (Surface Haze) (Comparative) (Surface Haze)

All samples had at least moderate stickiness and peel resistance. Sample 10 had the highest subjective tack and peel resistance, but the worst cure, as evidenced by a MEK abrasion test score of about 10, meaning that after approximately 10 MEK abrasions, the adhesive material had separated from the substrate. Samples 12 and 13 became cloudy after the MEK abrasion test, most likely due to component O (styrene-butadiene copolymer) coming to the surface during MEK abrasion. Thus, although Samples 12 and 13 have adhesive component ratios in the desired range, component 0 is likely incompatible with the other two components and therefore is not a satisfactory adhesive compound. It was desirable to obtain an adhesive material with a medium or lower level of subjective tack, a medium or higher level of subjective peel resistance and an abrasion test index

A MEK of 100 or more double wipes without clouding, which is a minimum

Samples 9 and 11 demonstrate this.

Example C

The curing performance of three different types of adhesive compound was tested by applying the adhesive material to the same film substrate as described in Example 2, and then curing by three different methods, including UV curing ("UV curing") on industrial equipment, electronic beam curing (EP) ("EP curing") on industrial equipment similar to UV curing equipment, but using electron beam curing technology, and EP curing on laboratory equipment ("laboratory EPpP curing"). Table 4 shows the composition of the three tested adhesive materials.

The comparison between the industrial EP system and the laboratory EP system was made due to the difference in the radiation energy provided by them. CM 111 O5 was used as an acrylic oligomer, KisskKkKui!? was used as an elastomer. 3500, and CM 3001 was used as a tackifier, as described in Example 1.

Table 4

Samples of the adhesive compound in 95 components in the final adhesive compound

Acrylic Amplifier | Ratio of adhesives

Sample Number and Elastomer - and Tack Oligomer Components (SCC) 14 15 16 "UV curing" consisted of passing the coated samples under a UV lamp at about 25 ft/min. (7.6 m/min) in air and about 2 to 4 passes were made, resulting in the sample being passed under UV lamps 2 to 4 times. One pass under UV lamp at 25 ft/min. (7.6 m/min.) corresponded to irradiation with an energy of about 100 mgj/cm2. "EP curing" in an industrial system (Batjebe! Sogrogayop, Germantown, WI, USA) was carried out in a nitrogen gas environment at a rate of about 125 ft/min (38.1 m/min) to about 250 ft/min. (76.2 m/min) in one pass, with the radiation dose ranging from about 2 mrad to about 2.4 mrad, and "laboratory EP curing" was also carried out in a nitrogen environment, but this required from about b up to 8 passes at about 10 ft/min. (3 m/min).

The total total radiation dose for 6-8 passes through the laboratory EP installation was from about 2 mrad to about 4 mrad. It is worth considering that in some cases, in order to ensure high resistance to peeling of one adhesive material from another adhesive material, a low quality of the surface of the adhesive fixative is desirable. If the adhesive materials 12 have nosular surfaces with a structure like an orange peel, the adhesive fasteners 12 usually adhere well to each other. It was found that all samples with a hardened coating had smooth surfaces with relatively low quality. After the approval of all samples, they were tested for resistance to peeling by the E method according to ATM 03330/03330М-04, the results of which are shown below in Table 5.

Table 5

The results of the test for resistance to delamination with different curing methods (UV compared to EP) write the results of the test for resistance to delamination 11111110 By invention/ | 0 Comparative/:/:/://С("

Resistance. . Number and Resistance Number

Resistance - | vidsharo- Number and and . passages - | delamination of passages delamination of weaving passages

Sample number through with through with UV- with EP- Stainless steel EP- UV curing. approval of systems for laboratory |laboratory RD system ha In EP-approval | EP-system 14,200 g/ld 100 g/ld and (Comparative) (78.74 g/lom) (39.37 g/lsm) | 678 passes 15,480 g/ld 200 g/ld and 16,680 g/ld 200 g/ld and

It was unexpectedly found that the results of UV curing (UV-curing) are superior to the results of both EP-curing in both systems. During EP-curing on the industrial line, adhesion was completely absent, that is, the peeling resistance was 0 g/ld. Some adhesion was observed during laboratory EP curing, but the best adhesion of all samples was demonstrated by the UV-cured samples.

In terms of UV curing results, Samples 15 and 16 had acceptable peel resistance values (i.e., 480 g/ld (188.98 g/lm) and 680 g/ld (267.72 g/lm), respectively), while as Sample 14 had a lower peel resistance (ie 200 g/ld (78.74 g/lsom)). The lower peel resistance of Sample 14 is likely due to the use of an adhesive compound in which the ratio of components is not within the required range of 0.5 to 1.5 (ie, the ratio was 2.2).

Without being bound by any limiting theory, it is assumed that during curing by UV radiation in ambient air (with an oxygen content of about 21 95), the sample is cured from the bottom up to its surface due to the increased oxygen inhibition of free radical curing on adhesive areas along neighborhood or near the surface. Because tacky components are more aliphatic in nature, they have lower surface energy than, for example, ester or urethane components. In some cases, self-organizing chemical systems move to a lower energy level if given enough time to do so. In this case, a lower speed is assumed

UV curing provides sufficient time for the sticky coating components to migrate toward the surface. In contrast, in EP curing, the curing reaction proceeds at a much faster rate, resulting in a more random polymer distribution that cross-links too quickly in the growing polymer network for significant surface-induced self-ordering to occur. energy Thus, the nature of the EP curing process can be opposite to that of the UV curing process, with EP curing typically occurring in a nitrogen-purged environment and may result in faster curing at the surface and slower near the substrate. Due to this, an adhesive material with completely different characteristics can be obtained exclusively due to different curing methods.

Normally, such rapid curing is desirable, but in the case of the coatings described in the invention, such rapid curing is disadvantageous because it does not provide sufficient time for the adhesive components to fully self-organize during the process.

Without being bound by any limiting theory, it is further suggested that the slower UV curing allows the growing polymer

The blocks self-organize, as a result of which polarized polymer blocks have an affinity for the substrate, and non-polarized polymer blocks have an affinity for the surface, while due to the presence of non-polarized polymer blocks near the surface of the substrate, the adhesive coating adheres and sticks to itself. Due to this, the adhesive components that are most compatible with the film substrate accumulate at the adhesive/substrate interface, thereby increasing adhesion to the substrate, which may be one of the factors contributing to the lack of peeling from the film substrate.

Example 4

Two Samples 17 and 18 of the inventive resealable adhesive-based retainers were produced according to Table 6. Both adhesive samples were compared with a standard self-adhesive retainer (control SCM,

Sample 19) for commercially produced Mabizso Spir5 Apou Zpask'p Zea packaging made from standard SCM (Bazzop 5700, Amegu Oeppizop Sogr., Pasadena, IN

California, USA).

Table 6

Compounds of fasteners based on adhesive material 11111011 bbcomponents of the final adhesive solution/-/-:/ /// /

CM111 05 | KisskKKuyu CM 3211 Ezasygeye Ratio

Samples (Acrylic 3500 (Intensifier ktO46 adhesive components oligomer) |(Elastomer)| stickiness) |(Photoinitiator) (SKK) (18(invention). | 35 | 0 | 62 | with | 056

The coated substrate contained about 77.295 EMA, about 10 95 organometallic GH OPE, and about 12.8 95 concentrated filler composition based on RoiuOpe 231-615 organoclay. The concentrate contained from about 5795 to about 6395 organomodified clay and a carrier containing MA-YSORE and polyethylene. Sample 17 was cured in a UV curing section using an average light energy of about 730 mgj/cm: and at an average linear velocity of about 100 ft/min. (30.5 m/min.) at an average temperature in the drying oven of 130 "P (54.47). Sample 18 was cured in the curing area by UV radiation using an average light energy of about 700 mgj/cm? with a linear speed of about 100 ft/min (30.5 m/min) at a drying oven temperature of 160 "E (71.1 "C). Standard adhesive (control

SCM) was already used in its finished form and was glued to the packaging for cookies (Ktai

Eoodv).

All three packages were tested for crumb contamination to determine whether food particles adversely affect the occlusion of the respective adhesive material. The test for crumb contamination consisted of the following stages: first, a Tgizsiysh cracker was taken and crushed with the bottom of a glass vessel. As a result of cracking in this way, small cracker particles were formed, which correspond to the particles that remain at the bottom of the package. A 2 inch (5 cm) diameter ring clamp was then placed on the adhesive test sample. Approximately 5 grams of crumbs were poured onto the ring installed on the sample. The sample and ring were slightly shaken to allow the crumbs to fall onto the adhesive surface of the resealable retainer. The ring was removed from the sample and the crumbs were gently shaken off the sample and removed. The ring was again installed on the substrate in its original position, and the number of crumbs remaining in the area where they fell was visually estimated. A visual rating scale of zero to 100 was used, with a score of zero indicating no visible crumbs remaining and a score of 100 indicating that the entire surface was covered with adhering crumbs. The results of the cracker crumb contamination test are shown in Table 7.

In addition, the resistance of the adhesive material to peeling after contamination with cracker crumbs was tested. Peel resistance was measured by the standard E method in accordance with

ATM 03330/03330М-04, according to which the adhesion strength of the adhesive material was determined by peeling one side from the other and measuring the force required for this. The initial peel resistance, the subsequent peel resistance after the first cracker crumb contamination, and the second peel resistance after the second cracker crumb contamination were measured when the sample was contaminated by the same method as for the initial contamination. The results are presented in Table 7.

Coo)

Table 7

Results of the test for contamination by crumbs

The original and | 95 resistance resistance 2. uyu resistance Resistance . delamination- Resistance of delamination- delamination- delamination- | dsharovu: vani after and vani, Evaluation of vani vani, that | vania after y

Samples of the first. . that has been preserved | pollution- (pollution- b remained after the second installation of the first pollution after nenation. (g/ld) (g/lot of the second is absent) pollution | (g/lot) (g/lot of pollution (g/lot) G(g/ scrap 19th SCM)

As can be seen from the results, the adhesion (i.e. resistance to peeling) of the control

SCM, measured by the EE test method according to AZTM 03330/03330М-04, decreased and amounted to about 5 95 of its initial peeling force (i.e. decreased from about 500 g/ld (196.85 g/roll) to about 25 g/ld (9 .84 g/piece)) only after two contaminations with cracker crumbs. In contrast, both Adhesive Samples 17 and 18 retained at least about 41 95 of their original peel strength after two cracker crumb contaminations, with Sample 18's peel resistance actually increasing after contamination and repeated caps and openings. In addition, the visual assessment of crumb contamination of the Samples ranged from 0 to 10 compared to 60-80 for the control SCM.

Uncontaminated Samples 17, 18, and 19 were also tested with a rolling ball in accordance with a modified version of the AZTM 03121 test according to the parameters of the AZTM 03121 test, unless otherwise specified.

The modified method determined how strongly the surface of the coating adheres to dissimilar materials, such as the polar surface of a rolling glass ball.

The rolling ball test consisted of stages in which: a glass ball placed two inches (5 cm) up a standard inclined surface was released according to the method

A5TM, and allowed the ball to accelerate along the slope and roll along the horizontal surface of the self-adhesive material sample. According to the modified version of the test, instead of the metal ball, a glass ball about 1/8 inch (0.32 cm) in diameter was used, and a lower starting position on the incline was used (ie, as above, two inches (5 cm) up the slopes). The relative stickiness was determined by measuring the path of the ball along the surface of the adhesive material until it stopped, starting from the end of the slope. Longer ball travel indicated less stickiness relative to the polar surface of the glass ball and less tendency for the coating to stick to the rollers and metal surfaces of the packaging machines, while shorter ball travel indicated higher tackiness. The longer trajectory of the ball may also correspond to less tendency to stick to food crumbs. In this case, measurements were limited to a maximum size of 4 inches (10.2 cm) given the maximum size of the sample available for testing was 4.0 inches x 4.0 inches (10.2 cm x 10.2 cm). The results of the rolling ball stickiness test are shown in Table 8.

Table 8

Rolling Ball Test Results (inches)

As can be seen from the results, both samples 17 and 18 according to the invention had less surface stickiness than the control sample, as indicated by the fact that the glass ball rolled freely on the surface of the resealable retainer and the 4 inch (10.2 cm) long sample. In contrast, the glass bead adhered to the control SCM almost immediately after contact with the surface of the control SCM, indicating a high surface tackiness of the coating.

Example 5

A re-peel test was performed to determine the ability to re-clog and peel after multiple repetitions. Approximately 20 samples were produced; Samples 20-35 were made using Sample 17 adhesive

From the compound from Example 4, and Samples 36-38 were made using Sample 18 of the adhesive compound from

Example 4. Samples were produced on an experimental industrial flow line for coating by flexographic printing. The liquid adhesive coating system was preheated to 160 "E (71 "C) and passed through a chamber knife device that was mounted on a chromium oxide coated etched ceramic roller. With the help of an engraved roller (the temperature of which was also maintained at 160 "E (71 "C)), the liquid adhesive coating was transferred to a rubber roller for applying the pattern. With the help of a rubber roller, the coating with the applied pattern was transferred to the moving film (ie, by the method illustrated in Fig. 6). After the coating section, the film was fed through a 60-foot (18.2 m) rough drying section. At the exit of the rough drying section, there was a UV installation consisting of three groups of ultraviolet lamps. Due to the configuration with the UV treatment zone at the exit of the rough drying section, the maximum length of the path from the coating area where the material was applied to the UV curing area was ensured and the time available for spreading and leveling the liquid adhesive coating to its hardening with the formation of a cross-linked mesh polymer structure.

It is suggested that in some cases the smooth and even surface of the coating helps to provide the necessary force to peel the adhesive materials from each other in a fully cured adhesive material.

A number of experiments with the application of coatings were carried out. The linear speed, the temperature in the drying oven and the number of groups of ultraviolet lamps were varied. The scheme of the experiment and experimental observations in a generalized form are given below in Table 9.

The visual roughness of the surface, resistance to abrasion using MEK and the separation of the adhesive material at the boundary of adhesion of the adhesive materials of the sample before the test were determined. In general, samples produced at a linear speed of 300 ft/min. (91.4 m/min) to 500 ft/min. (152.4 m/min), had a rough-looking surface and low or no subjective peel force These samples were mostly unable to perform instrumental measurement of peel force because the bonded samples split on their own before they could further tests were to be conducted. Samples produced at a linear speed of 100 ft/min. (30.5 m/min.), had a smooth-looking surface and a moderate force when peeling adhesive materials from each other. These specimens were further evaluated by means of an instrumented peel force test, the results of which are summarized below in Tables 10 and 11. As shown in Table 9, the multiple peel-reseal tests were performed only on specimens that did not self-separate. These samples are Samples, 21, 22, 29, 30, 31, 32, 35, 36 and 38.

Table 9

Schematic of the experiment used in the manufacture of samples for repeated flaking test

Number of Lines Test ininyna 2. ny .

N of the sample at y Temperature|Quantity| External for abrasion Division omer. velocity n Vii ' of the sample on the basis (ft./min.) in the dryer | of UV groups |type of adhesive MEK (number of connected adhesive glass and SE furnace) GS)| surface lamps of double samples and Imeters/min. material of abrasions)

Strong 17(EX4) | 100ts30.5) | 100 (37.8 17(EX4) | 100ts30.5) | 100 I37.8

Strong (cue about voopvom 100 (7v

Strongly (cue zva posle

Strongly

Strongly (kyu zt isogvnya

Strongly

Strongly

P(Ekya vooiyutya | tova 17(ЭХ4) | 100305) | 160 (711

Slightly. (item number 17(EX4) | 100305) | 160 (711 17(EX4) | 100305) | 160 (711

Strongly (cue about the voopvom tvo art

Strongly. 17(EX4) | 100ts30.5) | 130 54.4 18(EX4) | 100ts30.5) | 160 (711 18(EX4) | 50011524 | 160 (711 18(EX4) | з0Г91,4) | 160 (711

The first series of peel tests were performed with short peel intervals, that is, with an interval of about three minutes between peel-re-clogging operations. The results of these tests are shown in Table 10, which presents the averages of two samples for each test condition. These results are shown in comparison with the indicators of Sample 19 (control SCM) from Example 4.

Table 10

Results of tests on delamination-re-clogging with a three-minute interval 11117711 Value of resistance to delamination (g/ld)/losm|d -/-:// g |/

Number | Sample 19 vysha- | Control- Sample Sample 22 Sample | Sample |Sample|Sample| Sample| Sample Sample and 21 23 zo Z ze 35 36 38 digging| ny SCM 4 459.8 |181) 291.8 461.8 273.3 148 266.7 | 417.4 | A18,3 | 273.9 | 136.9 ' 114.9 181.68 107.6 58.3 1051 Ts164.3))1164.7|(107.8)) (53.9 2 320.8 74291 2421 131.6 32.5 | 129 .7 | 206.3 | 195.8 527.21 43 126.3 ' 95.3 51.8 12.8 51.11) 181.21 | 177.11 (207.61) (16.9 52.4 204.4 111.5 271 112.9 | 180.8 | 171.9 | 452.9 | 44.8

A 254.7 51.8 183.2 107.6 24.2 (95) 104.1 | 158.6 | 141.6 | 424.7 | 411 100.3 20.4 t21 42.4 SHO 41 62.41 | 155.71 (167.21 116.2 256.9 48.7 161.8 992 23.7 (9.3) 102.3 | 140.5 | 128.8 | 404.6 | 41.8 101.1 19, 2 63.7 39.1 772) 140.3 | (55.91 | 150.71 (159.3)) (16.5 5 A second series of peel tests was performed with longer peel intervals, i.e., with an interval of about 24 hours between peel-resealing operations, to determine the effect of longer adhesive-to-adhesive contact, with the first peel performed one week after the specimens were manufactured.The results of these tests with increased peel-resealing intervals for the specimens are shown in Table 11.

Table 11

The results of tests on flaking-re-clogging with a 24-hour interval in the value of resistance to flaking (g/ld) (g/brom vrom. 3235 36 | 38 education | ny SCM 4 539.8 271.1 441.7 288.8 | 1492 | 301.9 | 434.71 432.5 277.3 | 124 212.5 106.7 173.9 113, 7 58.71 | (118.91 11171.11) 11 70.31)(109.21 | 148.8 2 521.6 202 362.1 238.5 | 116.2 147 | 327.6 | 338.7 | 447.4 | 107.3 205.4 79.5 142.6 93.9 45.7 57.9 1291 (133.31) (176.11) (42.2

From 514.6 233.1 349.6 248.3 | 115.8 | 226.3 | 297.6 | 321.6 | 478.5 | 106.5 202.6 91.8 137.6 97.8 45.6 89.1 117.21 (126.61/(188.41| (41.9

A 550.3 218.2 314.8 222.2 95.5 239 |286.5| 289 /) 493.9 | 116.8 216.7 85.9 123.9 87.5 37.6 941 112.81)1113.6)(194.4)| (46 231.9 285.9 236.9 95.9 224 | 299.9 | 280.4 | 487.5 | 125.1

As the results show, in the samples containing the adhesive compound according to Sample 17 of

Example 4, there is no such pronounced weakening of the peeling force, which usually occurs with multiple peelings with an interval of 24 hours (ie, in Samples 21, 22, 29, 30, 31, 32 and 35 of this example). When Adhesive Sample 17 was in contact with itself for 24 hours between peels, the peel force recovered to about 8595 of its original value even after five uncapping-recaking cycles. Sample 30 had significantly lower mean values of peel force compared to other tested Samples. Even though the bonded samples did not separate on their own, it had a low surface finish due to the higher linear velocity of 300 ft/min. (91.4 m/min).

In addition, it was surprisingly found that in samples containing adhesive compounds according to

Sample 18 of Example 4 actually increased the peel force (i.e., Sample 36 in this example) when subjected to repeated peels with both short and long peel test cycle intervals, which, as shown in Table 7, their test results for flaking during contamination indicates a complete restoration of the flaking force after re-clogging. The magnitude of the peeling force increased only in Sample 36. Sample 36 is a sample cured at a lower linear speed, which may have helped to ensure an even and smooth surface of the sample (see

Table 9). Since Sample 38 was produced at a higher linear speed than

Sample 36, it has a rougher surface, which may be the reason for the increased value of the peeling force, as well as the low value of the initial peeling force.

For comparison, recovery of the peeling force in the control SCM was observed only with a long interval between peelings, i.e. 24 hours. With a shorter interval, the peeling force decreased by almost 40 95.

Overall, the best results in both peel-reseal tests were obtained for Samples 22, 32, 35 and 36. All four of these samples contained adhesives obtained under similar process conditions. For example, all four samples were produced at a low linear speed of 100 ft/min. (30.5 m/min.) using at least two or more groups of ultraviolet lamps. Adhesives that did not pass the peel-reseal test probably did not have enough time to spread and level before being UV-cured. /min.

Example 6

An adhesive durability test was performed in accordance with Samples 17 and 18 of Example 4, Table 6 to understand the effects of longer adhesive-to-adhesive contact times on peel properties. Various adhesive properties were tested over seven weeks, including subjective initial peel effort (ie, low, medium, high), appearance after peel, subjective stickiness or tendency to stick to fingers (ie, none, low, medium, high), strength of the coating (i.e. abrasion test with MEK solvent

By the method of AZTM 05204) and instrumentally measured exfoliation (that is, 5 consecutive exfoliations, repeated on the same sample at intervals of about 3 minutes, by method E according to ATM 03330/03330М-04; at the same time, tests of two samples were carried out, and the results were averaged) , in all cases with different duration of contact of adhesive material with adhesive material. Adhesives were applied to the same film substrates as used in Example 2. Table 12 below shows the results of the durability test of Sample 17. Table 13 shows the results of the durability test of Specimen 18.

Table 12

Generalized results of the test Sample 17 for durability

An initial peeling test was carried out

Change in appearance | No change in appearance. No change in appearance. | No change. No change in appearance. material adhesive rial rial material

Abrasion test

MEK (number of double 2100 2100 2100 2100 wipes)

Average resistance of 1 layer: | 553 /(248g/cm) | 567 (223g/cm) 559 (220g/cm) | 553 (218g/cm) in g/inch (g/cm)

Average peel resistance 2 in 370 (146g/cm) 381 (150g/cm) 377 (148g/cm) | 382 (150g/cm) g/inch (g/cm)

Average peel resistance in 339 (133g/cm) 354 (139g/cm) 347 (137g/cm) | 361 (142g/cm) g/inch (g/cm)

Average resistance of 4 layers: | 318/(125/cm) | 342 (135g/cm) 340 (134g/cm) | 338 (13Zg/cm) in g/inch (g/cm)

Average resistance of 5 layer: | 347 (122g/cm) | 322(127g/cm) 326 (128g/cm) | 323 (127g/cm) in g/inch (g/cm

The average resistance of five peelings is 378 (149g/cm) 393 (155g/cm) 390 (154g/cm) | 391 (154g/cm) g/inch (g/cm)

Table 12

Generalized results of the test Sample 17 for durability

Subjective effort of initial exfoliation

Change in appearance Spotty Spotty Spotty Spotty Spotty appearance after whitening whitening whitening whitening whitening whitening exfoliation surface surface surface surface surface

MEK abrasion test. 5100 5100 5100 5100 5100 (number of double wipes)

The average resistance to 1 peeling is 463 (182g/cm)| 600 (236g/cm) | 323 (127g/cm) | 505 (199g/cm) | 592 (233g/cm) g/inch (g/cm)

The average resistance to peeling 2 is 343 (135g/cm)| 375 (148g/cm) | 241 (95g/cm) | 311 (122g/cm) | 348 (137g/cm) g/inch (g/cm)

The average peel resistance is 333 (131g/cm)| 352 (139g/cm) | 228 (90g/cm) | 300 (118g/cm) | 335 (132g/cm) g/inch (g/cm

The average resistance to peeling 4 is 330 (130g/cm)| 326 (128g/cm) | 232 (91g/cm) 292 (115g/cm) | 326 (128g/cm) g/inch (g/cm)

The average resistance to peeling 5 in 311 (122g/cm) | 297 (117g/cm) | 226 (89g/cm) 277 (109g/cm) | 317 (125g/cm) g/inch (g/cm)

The average resistance of five delaminations is 356 (140g/cm)| 390 (154g/cm) | 250 (98g/cm) | 337 (13Zg/cm) | 384 (151g/cm) g/inch (g/cm)

Table 13

The influence of the duration of contact of adhesive material with adhesive material on the properties of multiple peeling (Sample 18) of the surface

Subjective effort of service exfoliation

External change No changes No external changes- No external changes- |No external changes- appearance after external | it looks like it looks like it looks like it peels off the look of adhesive material adhesive material adhesive material adhesive material material material

MEK abrasion test (number of 5100 5100 5100 5100 double abrasions)

Average 781 Peel Resistance 1 819 (322.4g/cm) 788 (310.2g/cm) 800 (315g/cm) - (307.5g/cm) in g/inch (g/cm)

Average peel resistance 2519 in 586 (230.7 g/cm) 567 (223.2 g/cm) 590 (232.3 g/cm) - (204 Zg/cm) g/in (g/cm)

Average resistance From 438 to delamination in 485 (190.9g/cm) 510 (200, vg/cm) 519 (204 Zg/cm) . (172.4g/cm) g/inch (g/cm)

Average peel resistance 4,399 in 396 (155.9g/cm) 407 (160.2g/cm) 409 (161g/cm) . (157 Tg/cm) g/inch (g/cm)

The average resistance to peeling is 386 (152g/cm)| 358 (140.9g/cm) 343 (135g/cm) 361 (142.1g/cm) g/inch (g/cm)

The average resistance of five BOB delaminations is 529 (208.3g/cm) 523 (205.9g/cm) 536 (211g/cm) and (198.g/cm) g/inch (g/cm)

Table 13

The influence of the duration of contact of adhesive material with adhesive material on the properties of repeated peeling (Sample 18)

Subjective effort of service N N No No No exfoliation

Change external Damage |Damage |Damage |Damage | Damage to the appearance after the surface of the surface of the surface of the surface of the surface of the peeling

MEK abrasion test (number of 5100 5100 5100 5100 5100 double abrasions)

Average peel resistance 1,963 in 1944 (371.7g/cm)| 833 (328g/cm) 819 (322.4g/cm)|846 (333.1g/cm) (379.1g/cm) g/inch (g/cm) "

Average 2 BBb peel resistance at 668 (263g/cm) 1377 (148.4g/cm) | 576 (226.8g/cm) | 622 (244.9g/cm) (218.9g/cm) g/in (g /cm) "

W o on nn in exfoliation in /428 (168.5g/cm)| 234 (92.1g/cm) | 437 (172g/cm) 1485 (190.9g/cm) - (85.8g/cm) g/inch (g/cm) pe o o a peeling in 102 (40.2g/cm) | 107 (42.1g/cm) I322 (126.8g/cm)| 229 (90.2g/cm) . (41, Zg/cm) g/inch (g/cm)

Wei a o a exfoliation in 64 (25 2g/cm) 66 (26g/cm) | 251 (98.8g/cm) | 134 (52.g/cm) . (28.7g/cm) g/inch (g/cm)

TEO reetavnyurovotanevkh vegetable vases of foam, peeling in 441 (173.6bg/cm)|323 (127 .2g/cm)|481 (189.4g/cm)|(463 (182.3Zg/cm) . (150.vg/ cm) g/inch (g/cm)

It should be noted that the average value of resistance to peeling is the average value obtained as a result of five peelings of the same sample, which were carried out consecutively at intervals of approximately three minutes. Thus, the first peeling was carried out, the resistance to the first peeling was determined, and the sample of the resealable retainer was resealed. After three minutes, the resealable retainer was uncapped again and the peel resistance was measured. This process was repeated until five peels were performed.

Both Samples 17 and 18 had good subjective peel force, subjective tack and MEK abrasion test results regardless of adhesive to adhesive contact time. Peel force values in Sample 17 (ie, initial and subsequent peel using the same Sample) remained consistent regardless of adhesive-to-adhesive contact time from day 0 to week 7. The peel-reseal cycle of Sample 17 was significantly more consistent than that of Sample 18. The loss of adhesive-to-adhesive strength after the initial peel of Sample 17, in terms of the reduction in peel force after subsequent peels, was generally less than about 1095 per subsequent delamination and was constant regardless of the duration of contact of the adhesive material with the adhesive material.

Beginning at week 3, a visible change was observed in both Samples 17 and 18 (ie, marked whitening and increased opacity) after peeling of the aged samples.

It is assumed that the visible change is evidence of microscopic surface deformation of the adhesive material due to forces acting on the surface of the adhesive material during

From exfoliation carried out manually or with the help of tools. Surface deformation does not affect the most important functional properties of the adhesive material (i.e. tackiness or peel resistance). In the end, Sample 17 held up slightly better, with its peel resistance increasing over time, i.e. peeling resistance was recovering, or generally maintaining 10 95 peel loss between successive peels.

Example 7

Sample 17 of the resealable adhesive retainer of the invention from Example 4 was compared with three other Samples 39-41 of the resealable adhesive retainer of the invention, the compounds of which are listed in

Tables 14.

Table 14

Fixative compounds based on adhesive material in 95 components in the final adhesive compound

CM 111 Evasyged Corresponding- 5 KisskKKuyu | CM 3211 vaA 144 CM 2302 shen - . - KTO46 th

Samples (Acryl- 3500 (Amplifier (Acrylic (Acrylic (Photo-adhesive |(Elastomer)| stickiness) | oligomer) | oligomer) initiator) oligomer) components (SKK) 17 (according to the invention 35 21101086 39 (according to the defect 27101011 oo 40 (at the exit 35181611 08 41 (at the west! 151018 | zm

The component of VEK 144 is an acrylic oligomer (VK 144, Votag Zresiayce5 Sotrapu, Torrington, CT, USA). A component of CM 2302 is also an acrylic oligomer (CM 2302, zapoteg

Sotrapa). The composition of all three Samples 39-41 included acrylic oligomer VK 144, while

Samples 39 and 40 contained two acrylic oligomers, and Sample 41 contained three acrylic oligomers.

Adhesive materials were applied to the same film substrates used in Example 2.

Samples 39-41 were cured in the UV curing area at an average linear velocity of about 25 ft/min. (7.6 m/min.) for three passes under ultraviolet lamps with total energy from about 400 mgj/cm2 to about 600 mgj/cm-.

Four adhesive materials were tested for coating strength (i.e. MEK solvent abrasion test according to AZTM 05204), as well as resistance to initial peeling by method E according to AZTM 03330/Y03330M-04. Also conducted tests with a rolling ball, using a modified version of the test

ABTM 03121 as described in Example 4, except that the size of the specimens available for testing was about 2.5 inches (6.4 cm) wide and about 7 inches (17.8 cm) long. The results of these tests are shown in Table 15.

Table 15

Results of curing and adhesion tests using compounds from Table 14

average

Testing on: . . . value

Samples | Erase MEK | exfoliation - exfoliation -. sticking | UI (the number of double 1 at the original M (g/ld) (g/scrap | 2 (g/ld) (g/scrap| : I (inch) |cm abrasion) exfoliation (g/ld) Gg/scrap

The resistance to initial delamination, that is, initial delamination carried out in laboratory conditions, increased in the new compounds by approximately 30 95-300 95 compared to

Sample 17 containing only one acrylic oligomer. The ball travel increased in the new compounds by more than 300 95 compared to Sample 17.

From the results obtained, it can be seen that the new compounds containing two or more acrylic oligomers had overall improved performance compared to Sample 17, as evidenced by the results of the rolling ball and peel resistance tests. All samples had an excellent curing speed, which is confirmed by the results of abrasion tests

MEC. In particular, all samples of the novel compounds, i.e., Samples 39-41, had lower surface tackiness than Sample 17, and in particular, Samples 40 and 41 had even lower surface tackiness, as evidenced by the fact that the glass bead rolled freely on the surface of the resealable retainer and a specimen 7 inches (17.8 cm) long.

Example 8

Four resealable retainers based on an adhesive material according to the invention from Example 7 were tested for various repeated peels. The samples were first peeled and opened, the peeling force was measured in grams per linear inch (g/d) by method E according to AZTM 0Ю3330/03330М-04, then re-sealed for three minutes and re-peeled. This occlusion-reocclusion was repeated every three minutes until 10 measurement points were obtained. The results are presented further in

Tables 16.

Table 16

Peel test with a three-minute interval 11111171 Average peeling resistance (g/ld)(/лом|д.-/:/х/:///СЙ peeling (according to the invention) (according to the invention) (according to the invention) (according to the invention) 777.76 | z92elBA | 4800891 7 4302rpvod; | 313.72) 777778... | zBabYizve | 50470987 / 39740565, | 25590007) 775 »ЮББ..| z3326p11309| | 491.8M93.6) / animal | 22453885)

Example 9

Repeated peel tests were performed at 24-hour intervals using the same four Samples according to the invention of Example 7. The samples were first peeled and opened and the required peel force was measured. The samples were then resealed and aged for 24 hours in a controlled environment, i.e., at a temperature of 72 "E (22.2 70) and a relative humidity (RH) of 50 95, after which they were re-peeled and re-opened. This process was repeated until they were a total of five measuring points were obtained, or within five days. The results are presented further in

Tables 17.

Table 17

Peel test with a 24-hour interval in Peel strength (g/ld) |g/lem 17 708.1 (278.8) 616.1 (242.611582.9 (229.311579.4 (228.111653.6 (257.3) 39 555.5 (218.7) 641.6 (252.61). 690 (271.71 1752.4 (296.21|. 653 (257 11 40 811.7 IZ19.6) 748 .6 (294.7|) 666 (262.21 | 614.7 (2421 | 546.9 (215.3)

AND

469.2 (1847) 513.6 (202.211516.8 (203.511503.2 (1981||. 479 (188.6)

All four samples maintained their peel values throughout the five-day test, with none of the samples having a reading below 400 g/ld (157.48 g/lum) on any of the test days. Samples 39 and 41 actually increased the peel force and recovered the original peel force or increased the peel force during the test period. Thus, due to the fact that these samples remained occluded for at least 24 hours, they regained or increased their ability to adhere.

Example 10

In Example 10, a test similar to the test according to was carried out

Example 9, using the four samples described in Example 7; however, after each peeling, the adhesive area was brought into contact with the coffee beans, resealed and left in this condition for 24 hours, and then peeled again.

After each exfoliation, whole coffee beans were placed on the sticky surface and removed in less than five minutes. The samples were resealed and aged for 24 hours in a controlled environment, i.e., at 72 "EE (22270) and BB 50 95, after which they were re-peeled and re-opened. This process was repeated until a total of five measurement points were obtained , or within five days. The results are presented further in Table 18.

Table 18

Peeling test with a 24-hour interval after contamination with coffee beans Average peeling force (g/ld) (g/brom

Primordial

Exfoliation samples Day 2 Day 3 Day 4 Day 5

Day 1 17,695 (273.6) 507 1199.6) | 422.1 (166.21) | 344.3 (135.61) | 271.5 (106.9) 39,627.3 (247) 647 (254.7) | 571.2 (224.9) | 458.6 (180.61 | 294.9 (116.11 770.4 ISOZ,Z) 548.3 (215.9) | 412.1 1162.21 | 327.3 128.91|. 230.4 190 ,71

AND

506.9 (199.6) 476.1 (187.41 382 (150.41 | 298.3 (117.41) 211.1 IZ)

Although a slight decrease in peeling resistance was noted, the peeling resistance values after five cycles of peeling/contamination with whole coffee beans still exceeded 200 g/ld (78.74 g/lom).

Example 11

The rolling ball test described in Example 4 was conducted using a film without an adhesive material to compare the tack performance of a low tack adhesive. The test results are shown below in Table 18. When testing

Sample 1 experienced a rather sharp turn in the path of travel of Mo Z shortly after contact with the film.

Table 18

Rolling ball test on uncoated film

Pathway to Mmeb /////777771771111111111111111611Ї1111111111111111111111 now

It is understood that in the details, materials and construction of the package and the process of its formation, described and illustrated for the purpose of explaining the nature of the described package, various changes can be made by specialists in this field of technology, which do not go beyond the essence and scope of the proposed method, characterized in the attached formula.

Claims (15)

FORMULA OF THE INVENTION 1. A polymer base on which a UV-curable adhesive material is applied, which contains: a polymer substrate, at least in part of which a certain number of adhesion-enhancing filler particles are dispersed, located and distributed in such a way that at least part of it interacts with the UV-curable adhesive material and provides a bond strength, UV-curable, low-tack adhesive material having a tack rating that ranges from about 10.2 cm to about 35.6 cm (4 to 14 inches) of ball travel, where said rating is measured according to of a modified version of the ATM 03121 test using a 3.2 mm (1/8 inch) diameter glass ball and an initial position of 50.8 mm (2 inches) up the incline, with a UV-curable low tack adhesive applied to a polymer substrate, at least a part of which contains dispersed particles of the reinforcing adhesion of the filler, and Zo at least a part of the particles of reinforcing adhesion filler at the interface between the polymer substrate and the UV-curable low-tack adhesive material that provides a bond strength of the UV-curable low-tack adhesive material to the polymer substrate of at least 236.2 g/cm (600 grams per linear inch) . 2. The polymer base according to claim 1, in which the polymer substrate on its outer surface contains at least a sealing layer, which contains particles of the reinforcing adhesion filler. C. The polymer base according to claim 2, in which the sealing layer contains a mixture of ethylene-vinyl acetate (EMA) copolymer, polyethylene and a filler composition containing adhesion-enhancing filler particles and a polymeric carrier. 4. The polymer base according to item C, in which the polymer carrier is polyethylene grafted with maleic anhydride, and in which EMA forms a continuous phase with polyethylene, filler particles and polyethylene grafted with maleic anhydride as a dispersed phase dispersed in the continuous phase, while the maleic anhydride has affinity for reinforcing filler adhesion. 5. The polymer base according to item 3 or 4, in which the sealing layer contains from 60 95 to 80 95 EMA, from 5 96 to 20 95 polyethylene and from 95 to 20 95 of the filling composition. 6. A polymer base according to any of claims 2-5, in which the sealing layer contains from 0.5 95 to 20 95 particles of an adhesion-enhancing filler. 7. A polymer base according to any of the previous items, in which the adhesion-enhancing filler particles are selected from the group consisting of clay, sheet silicates, calcium carbonate, montmorillonite, dolomite, talc, mica, and mixtures thereof. 8. A polymer base according to any of the previous items, in which the particles of the adhesion-enhancing filler are montmorillonite modified with surfactants based on ammonium salts and in which, optionally, the organo-modified montmorillonite is used in combination with a carrier based on grafted with maleic anhydride polyethylene. 9. The polymer base according to any of the previous items, in which the polymer substrate contains 1000 parts per million. or less fatty acid amides. 10. A polymer base according to any of the previous items, in which both the polymer substrate and the UV-curable adhesive material have a surface energy of 3.6 to 3.8 N/m: (from 36 to 38 dynes/cm3?); and/or in which the surface energy of the polymer substrate and the UV-curable adhesive material is substantially the same. 11. A polymer base according to any of the previous items, in which the polymer substrate contains a multilayer film having one or more polymer support layers and an outer sealing layer containing particles of an adhesion-enhancing filler, UV-curable adhesive material applied to the sealing layer . 12. The polymer base according to claim 11, in which one or more polymer support layers contain one or more layers of polyethylene. 13. A polymeric base according to any of the preceding claims, wherein the polymeric substrate comprises a layered material having a paperboard-based component, and wherein, optionally, the paperboard-based component has coated thereon a polymeric layer comprising particles of reinforcing filler adhesion. 14. The polymer base according to any of the preceding clauses, in which the polymer substrate with particles of the adhesion-enhancing filler dispersed in it has a higher surface energy compared to the same polymer substrate without the particles of the adhesion-enhancing filler, while due to the increased surface energy, From the strength of the clutch. 15. The polymer base according to any of the previous items, in which the UV-curable, low-tack adhesive material resides in the spaces formed at least in part by the adhesion-enhancing filler particles; and/or in which at least part of the particles of the reinforcing filler adheres to the surface of the polymer substrate. 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