CN102985334A

CN102985334A - Easy open flexible film packaging products and methods of manufacture

Info

Publication number: CN102985334A
Application number: CN2011800354439A
Authority: CN
Inventors: D.A.利津加; J.T.韦伯
Original assignee: Kraft Foods Global Brands LLC
Current assignee: Intercontinental Great Brands LLC
Priority date: 2010-05-18
Filing date: 2011-05-18
Publication date: 2013-03-20
Also published as: MX2012013365A; EP2571782A1; PE20130908A1; BR112012029072A2; ZA201208512B; WO2011146627A1; CL2012003191A1; AU2011255636A1; ES2555259T3; EP2571782B1; RU2012151925A; US20130114918A1; JP2013526466A; CA2799794A1; PL2571782T3

Abstract

Packages and methods having a flexible film (12) defining an interior contents cavity and having a first pair of opposing edge portions forming a first end seal (18), a second pair of opposing edge portions forming a second end seal (20), and a third pair of opposing edge portions forming a longitudinal fin seal (14) extending from the first end seal to the second end seal; the body having a first side portion having the longitudinal fin seal and a second side portion generally opposite the first side portion; a score (42) formed in the flexible film at the second side portion and defining an opening to the contents cavity upon initial rupturing and configured to propagate film tear longitudinally towards the second end- seal; a closure label (40) covering at least portion of the score, but less than the entire score; and a pressure sensitive adhesive being between the closure layer and the flexible film.

Description

Easily open packaged in flexible film product and manufacture method

Related application

The sequence number that the application requires to obtain to submit on 05 18th, 2010 is the right of 61/345,798 U.S. Provisional Application, and its full content is incorporated herein by reference.

Technical field

The disclosure relates generally to flexible package, and in particular to the flexible package with recloseable aperture.

Background

Flexible package often is used to preserve product to be used for transportation and storage.It is normally used for food, such as wafer, chewing gum, chocolate, cookies, cheese, sandwich, biscuit, candy, meat products, dry fruit and vegetables etc.Usually, the shape of package shape product that employing is held, perhaps it can adopt the shape of structural support, for example framework or the carriage in the packing.Sealing feature can be included on the flexible package in order to be used for follow-up consumption for the user provides a kind of simple, efficient mode to preserve some products again.

A kind of method of packaged in flexible film is to form it from continuous coiled material (web of material).The packing of these " stream packing (flow-wrap) " types (is also referred to as horizontal or vertical fin seal or lap seal packing, the end part seal packing, level pack and pillowcase packing) can make to hold and sealed product at assembly process by various coiled materials and layered product.

Some known package designs also can need extra material so that produce at different manufacturing equipments and/or consumption specification.For example, applying label (label) and the part that the label backing is removed as manufacturing process can cause unnecessary waste.

General introduction

Therefore, this paper provides the packaged in flexible film of opening easily and sealing.This packaged in flexible film can (for example have initial sealing to surrounding environment in a long time, gas/oxygen and moisture barrier), and has barrier layer (for example, being laminated to the label of film by pressure sensitive adhesive) in indentation (score) (tearing) the line top of stream packaging film.This indentation can limit opening in film, perhaps can be configured to packing opening so that film is torn diffusion to create.This embodiment can easily open with seal to preserve product after initial opening, keeps simultaneously package integrity properties.

A kind of scheme provides a kind of packing, this packing has flexible membrane, flexible membrane limits inner container cavity, and has a relative marginal portion of the first couple that forms the first end sealing, form the relative marginal portion of the second couple of the second end sealing, and the 3rd pair of relative marginal portion, the 3rd pair of relative marginal portion forms longitudinal fin (fin) sealing that extends to the second end sealing from the first end sealing; Body have the first sidepiece with the first sidepiece relative the second sidepiece substantially, the first sidepiece has the longitudinal fin sealing; Indentation is in the flexible membrane at the second sidepiece and forms, and is limited to the opening of container cavity when initial rupture, and is configured to sealing diffusion so that film is torn end wise towards the second end; Closure label covers at least a portion of indentation, but less than whole indentation; And pressure sensitive adhesive is between barrier layer and flexible membrane.

In a kind of scheme, pressure sensitive adhesive can have predetermined affinity between barrier layer and flexible membrane, so that indentation breaks when barrier layer is removed from the part of the second sidepiece.

In a kind of scheme, the first end sealing is compared with the second end sealing, the more close first end sealing of indentation.Indentation can be arc, comprises that wherein the arc indentation is towards an embodiment of the second end sealing.It is rectilinear, slightly pointed etc. that indentation also can be.In some packings, indentation can comprise and is configured to the paired terminal that stops flexible membrane further to break.In a kind of scheme, terminal can be configured to hook portion.In another kind of scheme, indentation can be the paired parallel line of weakness that extends beyond barrier layer from curved leading edge.

In a kind of scheme, barrier layer can comprise that noncohesive crawl section is to remove barrier layer at least a portion from the second side.This noncohesive crawl section can be curved leading edge.

In another kind of scheme, in case indentation breaks, then the extensible indentation that exceeds of barrier layer is to cover enough marginal spaces around the indentation so that seal opening effectively.

This packing can be used the flexible membrane with laminar structure.The laminated film structure can be the membrane structure of co-extrusion.In a kind of scheme, flexible membrane can comprise the layered product of polyethylene terephthalate and oriented polypropylene, and this layered product has the thickness that is in about 1.5 to 2.5 mil scopes.In another kind of scheme, flexible membrane can comprise the layered product of polyethylene terephthalate and oriented polypropylene, wherein, the layered product of polyethylene terephthalate has the thickness that is in about 0.4 to 1.0 mil scope, and the layered product of oriented polypropylene has the thickness that is in about 0.6 to 1.2 mil scope.

In some packings, barrier layer can be has the biaxially oriented polypropylene that is in the thickness in about 1.2 mil to 5 mil scopes.

Layered product for the production of flexible package can comprise: the flexible membrane with continuous coiled material of width and longitudinal axis; Discrete barrier layer, this discrete barrier layer utilize pressure sensitive adhesive be applied to continuous coiled material flexible membrane width to axis mostly and along the longitudinal; And, continuous coiled material and continuous barrier layer are configured to form series of identical packing and form blank, the flexible membrane that each identical packing forms blank has the indentation that is formed at wherein, this indentation is consistent with at least a portion of barrier layer, but not in all barrier layer, and this indentation forms the packing opening subsequently when breaking.In a kind of scheme, barrier layer can be has the biaxially oriented polypropylene that is in the thickness in about 1.2 mil to 5 mil scopes; And continuous film is the layered product that has in about 1.5 to the 2.5 mil scopes of being in of polyethylene terephthalate layer and oriented polypropylene.In another kind of scheme, film laminates can comprise pigment and the round cat paint layer that is arranged between polyethylene terephthalate layer and the oriented polypropylene layer.

Can comprise the following steps: barrier layer is merged to the continuous film volume with the longitudinal edge that separates preset width for the method that On-line Product is packaged into a series of packings; Between barrier layer and continuous film volume, stride across less than preset width but provide adhesives greater than half of this preset width; Make continuous film volume partly corresponding barrier layer and indentation in order in the continuous film volume, limiting opening when removing continuous substrate and cause initial rupture; Longitudinally the edge forms longitudinal sealing; Form the rearward end sealing between the adjacent packing in a series of; Become to provide product with packaged serially; And, form the leading section sealing.

For the field those of ordinary skill about packing, and from following description and claims, it is more apparent that further feature will become.

Brief description of the drawings

Fig. 1 is the perspective top view of an exemplary packaged in flexible film;

Fig. 2 is the perspective top view of the second exemplary packaged in flexible film;

Fig. 3 is the perspective top view of the 3rd exemplary packaged in flexible film;

Fig. 4 is the perspective top view of the 3rd exemplary packaged in flexible film that is shown in an open position;

Fig. 5 is the top view of an exemplary packaged in flexible film;

Fig. 6 is the partial side view in order to form and to pack the packaging technology of a series of packaged in flexible film;

Fig. 7 is the section drawing that the exemplary fin seal bite (jaw) of Fig. 6 obtains along hatching A-A;

Fig. 8 is the 4th exemplary perspective top view of easily opening packaged in flexible film;

Fig. 9 is a part that is used to form the rolling blank of packaged in flexible film;

Figure 10 is the section drawing of the exemplary film that obtains along the hatching X-X among Fig. 9/label layer laminate;

Figure 11-Figure 16 has shown the alternative line of weakness embodiment that is used for packaged in flexible film;

Figure 17-Figure 20 has shown the alternative barrier layer embodiment that is used for packaged in flexible film; And

Figure 21 is the perspective bottom view of exemplary packaged in flexible film.

Detailed description of preferred embodiment

Although packaged in flexible film has advantage, such packing is difficult to open for consumers sometimes.In addition, these packings food and customers of usually holding different amounts may not wish once just to consume whole contents.Therefore, can comprise again envelope (or seal) feature in order to be used for follow-up consumption for the user provides a kind of simple, efficient mode to comprise some food.

By and large, this embodiment has set forth a kind of feature that has cost benefit and easily open, and product obtains to be used for the making customer obtain completely, and comprising for the product that does not consume after opening first simultaneously provides the seal feature.This packing also can be convenient to singlehanded consumption.According to a plurality of embodiment, provide packaged in flexible film herein and for the production of the method for this packing, this packing can have the local at least initial sealing of surrounding environment, and can open easily and Reclosable.More particularly, initial sealing (it exists before initial opening of packaged in flexible film) can provide within the long time period the local at least barrier of surrounding environment (comprising gas and moisture).For example, the initial sealing of packaged in flexible film can be before initial opening provides optical barrier and and gas (oxygen) and moisture barrier at least in 6 to 8 months.In some applications, before initial opening, can expect in addition the longer time gas and moisture barrier.

In addition, the common Reclosable of packaged in flexible film comprises with the product after the initial opening that is used for packing.Although the disclosure is described for food applications,, it is also applicable to packaging applications etc. non-food stuff, medical treatment, medicine, industry.In a kind of scheme, packaged in flexible film is configured to hold many portions of food substantially.Therefore, the again closed characteristic of packaged in flexible film helps to preserve/hold the product in the packing after initial opening.

This packaged in flexible film can have multiple structure, for example comprises, bag, bag or other shape are such as tubular, column or the shape etc. of rectangle substantially.This packaged in flexible film can have square rim, such as find in the packing that is mainly rectangular shape those, perhaps can have more curved edge, such as find in the packing of more circular or elliptical shape those.In addition, this packaged in flexible film can form around the food, such as the packing with lining (sleeve) structure (its be enclosed in the discrete stacking or food of food stacking around).In other is used, can completely or partially form packaged in flexible film, and filling food then, this can be useful for various discrete food.

By a kind of scheme, the product that the structure of packing and shape can be received by packing content mainly affects, and this part ground is because the flexibility of laminated film.In the another kind configuration, flexible membrane can be configured to stream packing or the external packing (overwrap) around supporting structure, this supporting construction is internal rigid supporting member or product carriage for example, is preferably " U " plate, although this is not that to put into practice embodiment necessary.

Such as used herein, flexible membrane can be rolling or forms the flexible sheets of the material of blank, and is made by the membrane structure of lamination or co-extrusion, with rete and the analogue of casting or blowing.By a kind of scheme, flexible membrane can comprise the layered product with a plurality of layer materials.Laminar structure can comprise polyethylene or polypropylene, such as polyethylene terephthalate glycol (PET) layer and/or directed polypropylene (OPP) layer.Other optional layered products can comprise polyethylene (PE) layer, polypropylene (PP) layer, poly(lactic acid) (PLA) layer, and metallized layer, such as metallized oriented polypropylene (MET OPP) layer, etc.These different layers can have different thickness and density.In addition, flexible membrane can be several combination in the above-mentioned membrane structure.By another kind of scheme, film can comprise single polymer layer.The member of flexible membrane layer laminate can be by bonding or pass through extrusion process and engage.

If use pet layer in the flexible membrane layer laminate, then pet layer can affect the rigidity of layered product.More specifically, depend on the thickness of pet layer, pet layer can have from the flexibility to the semi-rigid hardness in various degree.If necessary, can incorporate pet layer into layered product, because its relative light weight and firm, and can have very high diaphaneity.Pet layer also can help the barrier as oxygen (gas) and moisture.In addition, OPP layer further strengthened flexible film and also providing infiltrative favourable barrier also.

The packaged in flexible film of describing herein can be formed by the continuous coiled material of in every way sealing.Sealing can comprise for example fin seal or lap seal, and various end part seal (for example top seal, sealed bottom and side seal).By a kind of scheme, flexible membrane can make two relative marginal portions join to form the longitudinal sealing that extends to the second end sealing from the first end sealing.That sealing can be is airtight (and can have in various degree air-tightness, for example local or significant gas tight seal) to help shelf-life of any product that keeps wherein holding.Sealing can be formed by various techniques, such as for example heat seal, cold sealing or low adhesive seal technique, and their combination, and usually be considered to primary seal and usually be persistence or destructive sealing.That packaged in flexible film also can comprise is peelable/sealing that can seal again.Sealing for example can use the pressure sensitive adhesive between flexible membrane and barrier layer (PSA) or low tacky adhesion (LTA) to form around the packing opening.Sealing feature can be formed by multiple manufacturing process again.

Flexible membrane can have indentation, and indentation limits the packing opening when initial rupture or initial openings.Indentation also can be configured to limit at least a portion packing opening and tears diffusion in film with restriction, and is configured to preferably towards the second end sealing end wise tearing film.The line of weakness that the machinery of any type forms or cut out, the indentation that laser forms can be described in term used herein " indentation ", or any other meeting infringement membrane integrity and do not destroy the indentation means of its (line namely).Indentation can be arranged to partly cut the degree of depth of flexible membrane, and perhaps it can be the breach of cutting the entire depth of film at given line.If partly cut film, indentation also can form at the either side of flexible membrane, so that indentation can be by outside face or the inside face of incision flexible membrane.In one example, make indentation enter the flexible membrane and extend through flexible membrane from the inside face of flexible membrane, and roughly pass pressure sensitive adhesive.In addition, indentation also can be discontinuous line, and such as perforation in groups, the degree of depth that it also can partly pass flexible membrane perhaps passes completely through the entire depth of flexible membrane.

In an example package, barrier layer (such as discrete tags) is extensible to stride across at least a portion of line of weakness and extension in relative marginal portion (it engages to form longitudinal sealing).Pressure sensitive adhesive can be between flexible membrane and barrier layer.Barrier layer can have tack-free crawl section (for example peeling label), and it is used to make at least a portion of sealing to discharge to form the packing opening from flexible membrane.Barrier layer preferably extends across at least a portion of indentation, and Reclosable adhere to film.

By a kind of scheme, barrier layer is crossed at least part of indentation and is arranged on the part of flexible membrane.Barrier layer can comprise label, for example with label, release liner or the unlined label (before being applied to packing) of backing.In the another kind configuration, barrier layer can comprise the second flexible membrane, and wherein, pressure sensitive adhesive is arranged between flexible membrane and the second flexible membrane.Pressure sensitive adhesive can be the clearance layer of laminated film structure, so that pressure sensitive adhesive is laminated between flexible membrane and the second flexible membrane layer.

Herein described packing opening preferably Reclosable comprise to be used for product.Pressure sensitive adhesive between flexible membrane and barrier layer helps to produce the again envelope feature of packing opening.Pressure sensitive adhesive can be suitable for the again sealing under the various conditions, under room temperature and refrigerated condition, etc.

The method for the production of packaged in flexible film that provides herein can comprise: form indentation in the part of the flexible membrane of the continuous rolling with longitudinal axis, and longitudinally the part of axis is applied to barrier layer with adhesives (for example pressure sensitive adhesive).By a kind of scheme, barrier layer can be applied on the partial width of flexible membrane of continuous rolling.The method also can comprise from two opposite edges of the flexible material of continuous rolling and forms continuous longitudinal sealing and form first end sealing and the second end seals.This flexible package can be with respect to the packing of product and is formed in off-line procedure with in line process, and, can in level and vertical shaping-filling-seal operation, form in addition.

The method that packages the product in in the series package can comprise feeding continuous film volume, and this continuous film volume has longitudinal edge and have preset width between longitudinal edge.The method also can comprise striding across less than whole preset width utilizes continuous film to intervolve also/laminated substrates.By a kind of scheme, when initial rupture, in case substrate (substrate) is removed from the continuous film volume, continuous film volume limiting opening (perhaps at least a portion of opening) in the film volume, and is provided the adhesives (to a certain degree releasability and the pressure sensitive adhesive of sealing ability more for example are provided) of exposure by indentation between substrate and continuous film volume.If carry out on line, then the method can be provided as the product of series package, and continuous film is rolled up and substrate can hold product.In addition, can provide longitudinal sealing (for example fin or lap seal) along the longitudinal edge of continuous film volume, and can between the adjacent packing that becomes series package, provide leading edge end part seal and trailing edge end part seal.

The one-tenth series flexible package 10 that the following describes can just form before film holds product online, perhaps for a long time off-line formation before product is packaged.For example, laminar structure can prepare before utilizing the product packing being brought to baling line.In the another kind configuration, layered product can form online with packaging operation, so that layered product forms when the packing of product or before greatly.

In certain embodiments, packaging film provides mould or the laser beam cutting/indentation that forms arc usually, and it is covered by the barrier layer (label) with pressure sensitive adhesive layer at least in part.But some allows to pack the pulling-on piece of opening easily without PSA to form label.In use, when the pulling pulling-on piece, film separates at the line of weakness place and continues to tear and form large opening along the direction of drawing and obtain to be used for product.The tearing diffusion and can reach at film and stop when one of them mainly seals of film.The PSA that exposes at label can be used to seal and pack to hold any remaining product.This packing is suitable for the product of various (also can be short stacked side by side) placed side by side.In certain embodiments, also can use slug packing (that is, vertically product is stacking).

Forward now accompanying drawing to, shown substantially with the package design of the current streams packing of 10 expressions and for the manufacture of its preferred embodiment.Fig. 1-Fig. 3, Fig. 4, Fig. 8 and Figure 21 show the packing 10 that is formed by film 12.Fig. 4 shows the packing 10 that is shown in an open position.Film 12 can be rolling or forms the flexible sheet material of blank, and is made by the membrane structure of lamination or co-extrusion, with the rete of casting or blowing etc.Example can comprise single polymer layer, such as polypropylene, polyethylene, poly(lactic acid) (PLA), polyester etc.By and large, film 12 is can be between 1.2 mil to 5 mils on the thickness, and 1.5 to 2.5 mils preferably.Film thickness also can be with relevant to the required barrier of gas, moisture and light; Relevant with required structure integrity level, and relevant with the degree of depth (being described below) of required line of weakness.

Film 12 can be heat-sealable copolymer.In certain embodiments, heat-sealable poly-mer forms sealing between 50 and 300 degrees centigrade.Film 12 also can be pressure sealing film (for example cold diaphragm seal or other do not need heat).In certain embodiments, the pressure sealing film about 0.7 and the pressure of 7.0 Kg/cm between and preferably form sealing at the pressure place of about 5.6 Kg/cm.

With reference to Figure 10, film 12 preferably can be layered product, and for example polyethylene terephthalate (PET) layer 82 and oriented polypropylene (OPP) layer 86, and perhaps alternatively, film 12 can be single polymer layer.Depend on its thickness, pet layer is of a flexible to semi-rigid.PET is preferred, because its unusual light weight, firm, and when needing the packing specification book, have very high diaphaneity.It also can help as oxygen (gas) and moisture barrier.The OPP layer can increase further intensity, and is to infiltrative further barrier.Pressure lamination member can engage by lining cement or by extruding.Pet layer can have the thickness of (preferably about 0.48 mil) in the scope that is in about 0.4 to 1.0 mil, and the OPP layer can have the thickness of (preferably about 0.7 mil) in the scope that is in about 0.6 to 1.2 mil.

Film 12 also can have extra laminate layers alternatively.Can add sealant layer, sealant layer 88 (Figure 10) for example is in order to during packaging promote the formation of the sealing of packaged products.Therefore, sealant layer will be oriented on the film surface of pointing to package interior.Sealant layer can be different polymeric sealants, the polymeric sealant layer of thermal activation for example, as ethane-acetic acid ethyenyl ester (EVA), ionomer plastics (such as by E.I.Du Pont Company with trade name SURLYN sell a kind of), metallocene compound, organic clay etc.In the scope of present embodiment, cold aquaseal and pressure sealing agent also are possible.Should be noted that the aquaseal that when being expected to be food, will use food stage.

In a kind of configuration, reinforcement is added into flexible membrane 12 to increase the rigidity of film.These reinforcements can be replenishing that rigidity that thickness that can be by changing above-mentioned laminate layers or density are caused adjusts.These reinforcements can be added as the member of squeeze film or as independent layer.For example, laminate layers (such as polyamide polymer (for example nylon)) can be included in the laminated film structure of flexible membrane volume 12.By a kind of scheme, nylon can be added as laminate layers, and it remains to the remainder of membrane structure by adhesives.In addition, in a kind of configuration, nylon layer can be positioned between other layers, so that other flexible membrane layer are attached on each side of nylon layer (that is, articulamentum).In one example, nylon layer can comprise film thickness about 6% to 10% or for about 0.004 millimeter.In a kind of scheme, nylon layer comprises about 8% of film thickness.By another scheme, nylon layer can comprise the layer of about 0.004 millimeter thickness.

Optional rete also can comprise coat of colo(u)r 84 (Figure 10).For example, a specific layered product can comprise pigment and the round cat paint that is arranged between PET 82 and the OPP layer 86.In a preferred embodiment, the various combinations of metallized layer and layered product also are possible.

As shown in the figure, film 12 is configured as to hold the product of single service carriage placed side by side, although depend on the desired product that wherein holds, this embodiment also can be embodied as various curve shapes and linear (lining) or oval-shaped packing.

Packing 10 can be substantially forms lining along the flexible membrane 12 of the indentation of sides adjacent by having longitudinal sealing 14; The first anterior lining end part seal 20 is substantially transverse to the longitudinal sealing at the first pack end place; And the second rear portion lining end part seal 18 is substantially transverse to the longitudinal sealing at the second pack end place, and the zone between the first sealing and the second sealing limits package interior.Sealing 14 is shown as fin seal (as clearlying show that) here in Figure 21.

As previously mentioned, film 12 preferably has sealant layer 88 at the inside face of film.Preferably, sealing 14 and end

part seal

18 and 20 are aforesaid not peelable primary seals.The sealing of present embodiment can be combined to form by heat seal, cold sealing, sound wave, low adhesive seal and the various of them, and limits the product receiving compartment.

Film pack end sealing does not allow the user originally to be at end part seal to unpack usually.Usually then the main body of crawl packaging film is pulled to and opens.Although use barrier layer 40,, the flexible package shown in herein provides easily opening.By way of example, as shown in FIG., barrier layer 40 can be the discrete tags that is laminated to film by pressure sensitive adhesive.Stripping film 22 in the label 40 can arrange and need not grasp in the present embodiment the body of packing to allow to unpack simultaneously.Stripping film 22 is parts that are not depressed into film by psa layer of barrier layer 40.As shown in the figure, stripping film 22 can be the sheet of radial shape, although also may be other shape, and for example square (Figure 17) or " V " shape (Figure 19-20), and opening that the finger crawl begins to pack can be provided.

Present embodiment also provides aforesaid indentation to flexible film package 12 structures, and is configured in order to the film opening that limits or guiding is packed.Preferably, indentation 42 is added to the side of inside of the sensing packing of film.Line of weakness can comprise various configurations adapting to packing and product specification, but preferably is configured to initiate at least the diffusion of tearing of film.For example, Fig. 1-Fig. 3, Fig. 8 and Figure 11-Figure 13 have shown 42 configurations of possible indentation.As shown in the figure, line of weakness 42 can be the indentation (42b) of arc (42a), paired almost parallel.In the place of using parallel indentation, they are preferably less than the width of packing or the product that wherein holds.

The line of weakness that exposes tends in use spread further tearing.Present embodiment has shown that the line of weakness that stops to reduce this tendency disposes in pattern.Particularly, Fig. 3 has shown two " J " hook-shaped line of weakness 42c of outside sensing, but other configurations are possible.These can comprise two " J " hook-shaped line of weakness 42e (Figure 12), " smile " shape termination 42i of section (Figure 13) etc. of inside sensing.Can comprise that also Packing Intact feature 90 (Figure 11) is as the part of line of weakness 42d.Figure 14 has shown the line of weakness 42f with the square corner that is arranged in label 40 belows.Figure 15 has shown the line of weakness 42g with the angled corner that is arranged in label 40 belows.Figure 16 has shown the line of weakness 42h with the pyramid pattern that is arranged in label 40 belows.

In the present embodiment, label 40 can be applied to the side that film 12 points to the outside of packing 10, preferably uses pressure sensitive adhesive (PSA).Label 40 preferably covers at least a portion line of weakness 42 and is configured to sealing diffusion so that film is torn end wise towards the second end.On the surface of packing 10 and the peel strength between the label 40 than separately the required power in the both sides of indentation is larger along line of weakness 42.Therefore, label 40 is strippable for the surface of packing 10.Therefore, the lasting drawing on pulling-on piece 22 plays breaking of line of weakness 42, as shown in Figure 4.Should be noted that indentation 42b among Fig. 2 can continue diffusion barrier and tear, until reach end part seal 18, because end part seal 18 is main (not peelable) sealings.

It is transparent, opaque or print alternatively that barrier layer (label) 40 and film 12 can be.Should be noted that however label 40 can be described as substantially utilizing any film of adhesive coverage and be in the scope of present embodiment.Shall also be noted that the label that in the scope of present embodiment, also can use with lining.In the scope of this packaged in flexible film, label 40 can be presented as various ways.Other illustrative embodiment can find in Figure 17-Figure 20.Figure 17 has shown linear label 40a.Figure 18 has shown curvilinear figure label 40b.Figure 19 has shown pyramid label 40c.And Figure 20 has shown " arrow " shape label 40d.

Linerless inner label can be plane materiel (facestock), and it is coated in a side with pressure sensitive adhesive but can linerlessly be rolled into bobbin innerly.This can realize by the release coat (perhaps homopolymer in alternatives, for example polypropylene) that is applied to the side opposite with adhesive coating.Plane materiel can comprise standard paper, film, plastics, fabric, paillon foil, directly-heated, etc.Linerless inner label can utilize with removable and repositionable adhesives.Alternatively, the flexible membrane that is coated with adhesives can be used for label 40.

Label can be oriented polypropylene (OPP), comprises that scope is the twin shaft OPP of about 1.2 mil to 5 mils (preferably about 2 mils) or the semi-rigid polymer of other types, such as PET etc.PET is preferred, because its thermal resistance when creating not peelable sealing.PSA is preferably neutral or non-reacted to product, and is configured to provide roughly airtight sealing, even (that is, PSA can approximately-10 operate to 90 degrees centigrade range of temperatures under refrigerated condition; And preferably in about 2 to 7 degrees centigrade scope).Preferably PSA directly is applied to film, but can be applied to pigment or any other coating on film.PSA should keep being attached to label 40, though through repeatedly open and again the sealing after.

Should be noted that label 40 can be applied in to cover at least in part line of weakness 42.As shown in FIG., film 12 provide by line of weakness 42 limit or the packing opening 44 that guides to allow the user to reach product 46.Line of weakness 42 can have the different degree of depth and width in film 12, and can form by different cutting modes, for example uses laser or die-cutting apparatus.In addition, the peel strength of line of weakness 42 must be weaker than the bond strength of PSA30 to allow film to utilize label to shell back.Just to the purpose of explanation, in one embodiment, PSA 30 configurable have (separate) power of opening of 350 grams/inch and 200 grams/inch closure (adhesion) power.But should be noted that and in the scope of this package design, can consider other open and close power scopes.

Preferably, the part of the packing of 42 processes of line of weakness is not in order to affect the barrier characteristics (for example gas or moisture) of packing.In this case, label 40 will not need the airtight barrier that provides initial, although alternatively and inherently, it can.Optional label 40 barrier characteristics can come from the inherent characteristic of label material, or by being added into the barrier layer of label 40 (not shown).Indentation 42 can be cut outside face or the inside face of film 12, but preferably on inside face.Can affect among the embodiment of barrier quality of film 12 even should be noted that indentation 42 therein, in the place that the whole indentation part of film 12 is covered by label 40, the application of label 40 should compensate the impaired barrier that is created by indentation.

In the use of the structure of Fig. 3-Fig. 4, the unencapsulated inside face 50 that the user can delaminate with a hand crawl label 40, and grasp on end part seal 20 or near the zone it with the another hand.Label is delaminated and can be shelled back backward/downwards to form opening 44, until it arrives " J " shape hook portion shown in Fig. 4.Under any circumstance, preferably, label 40 and attached film thereof in use are not pulled away from packing 10.In the embodiment of Fig. 1-Fig. 2 and Fig. 8, this can realize by the not peelable seals in rearward end sealing 18.In these embodiments, delaminating on label 40 22 can be used to make longitudinal tear towards end part seal 18 (limiting there film further breaks) beginning/diffusion.Parallel lines (for example 42b among Fig. 2) is extensible until the random length of end part seal 18.In an optional embodiment, Fig. 8 shows that sheet 22 extends in the end part seal 20.Under any circumstance, sheet 22 should have non-stick portion 50.Can not comprise adhesives on that part of label, perhaps it can weaken in every way, such as utilizing pigment, varnish etc.Alternatively, the non-stick portion 50 of sheet can be covered by another layered product (for example extra polymeric layer between PSA and film), perhaps is folded on the part of the label on himself.If the user wants that enclose is to preserve any remaining product again behind initial opening, the PSA 30 of exposure (referring to for example Fig. 4) can be re-sticky back on the film.Then, break in case should be noted that indentation, barrier layer should be configured to extend beyond indentation covering enough marginal spaces around the indentation, so that seal opening effectively.

Therefore, present embodiment can utilize membrane property to control and tear the scored areas that exceeds the label below.Preferably, the material of given increase and expense, label 40 is that little discrete label is delaminated and a kind of device to provide, this device makes indentation spread to open and makes tears end wise end part seal guiding backwards, but does not cross the rearward end sealing.The orientation control of film is torn substantially along the straight line towards the rearward end sealing.Therefore, present embodiment only needs the part indentation to begin to tear or break.

In the scope of present embodiment, optional or alternative feature also is possible.The vertical bag embodiment (not shown) that is used for grain products (for example coffee) also can use described sealing and closed characteristic again.Have fin seal although present embodiment has been presented as,, present embodiment also can cover the lap seal (not shown).Lap seal by at first making film first surface and second surface overlapping with form lining (with make in the fin seal same surperficial overlapping opposite) form.

By and large, packing 10 can be assembled in several ways, for example by at first packing height and inner space at relative side (relative vertical side) junction film 12 to form fin seal 14 and to limit.

End part seal

18 and 20 can formation after product 46 (and optional carriage, if any words) has been placed in the inner space of packing 10.Therefore end

part seal

18 and 20 can limit the width of packing 10.That fin seal 14 and end

part seal

18 and 20 can be thermosetting (that is, heatsealing) or other welding manners.Alternatively, sealing 18 and 20 can be used pattern, curling or annular knurl.Under any circumstance, sealing 18 and 20 preferably is considered to gas tight seal (that is, forming gas (oxygen) and moisture seal).

Assembly process in the present embodiment can form fin seal 14 when making two vertical film edges (referring to the

edge

72 and 74 of Fig. 9) engaged and sealing by heated wheel.Such as top discussion ground, can with the internal sealant layer (88, Figure 10) be applied to film to promote the type of required sealing.This inside is bonding to be applied to up to 100% inside face or only to provide sealing in the place of needs.

Method in order to the assembling packing can be used heat seal, cold sealing, extruding and adhesive lamination, perhaps co-extrusion.Fig. 9 shows the section of the rolling blank of the packaged in flexible film that is used to form Fig. 3.Besieged and when being sealed in stream film (flow film) when product, flow film/label layer laminate and can be cut into individual packaging (referring to Fig. 5).

A kind of illustrative methods of making a packing embodiment illustrates by installing 60 in the Fig. 6 that uses packing device substantially, and this device is positioned at the product top with film, and then holds film downwards to form fin seal below product.As shown in the figure, discrete label 40 is aligned on the film 12 at label application device (applicator) 54 places.Before adding label 40, film 12 can be in indentation on the film surface of pointing to the inside of packing 52, yet, also can be with the top surface indentation.Preferably, although indentation occurs in applies after the label.As mentioned above, indentation can be by laser, mechanical device, such as cutter etc.

Then, when film 12/ label 40 layered products formed box 34 (also referring to the section drawing on Fig. 7) around product 46, fin seal 14 can form by fin seal device 38.Sealant layer can be heated the wheel force together, and this activates the sealant layer on interior layer.Be used as the place of sealant layer at EVA etc., heated wheel can be heated between 85 and 205 degrees centigrade.In addition, linear velocity and film thickness also are being factors aspect sealing formation and its fissility and the air-tightness.As shown in Figure 7, fin seal 14 is directed to the bottom of packing 10.Should be noted that fin seal 14 is orientable to the either side of packing 10.

As shown in the scheme drawing of Fig. 6, in case film has surrounded product 46, then end

part seal

18 and 20 can form by adjacent upper and lower sealing bite 62, and it is the end of heat-sealable packing not only.Blade can make respectively to be packed fully separation or partly cuts or make alternatively the otch between packing to bore a hole so that they keep together.

Fin seal 14 and end

part seal

18 and 20 can form from the pattern of heated wheel 38 or sealing bite 62 impressions alternatively, and heated wheel 38 or sealing bite 62 are spent mould in manufacturing process when pulled.

Sealing bite 62 can move through manufacturing line and rotates along with film 12, and it engages to form end part seal 20 by end seal there.Then, along with the sealing bite is further rotated, can utilize sealing cutting mould and with the film cutting, then form rearward end sealing 18 in the bite.In the thermosealed embodiment that uses activation, sealing bite 62 can heat by the heating element (not shown).Need the place of the rippability of varying level between end part seal 18 and end part seal 20, independent heater element is possible.

The film volume 12 that is used for the device 60 of Fig. 6 can be shown as the substantially section of the blank of the demonstration of 70 places in Fig. 9.This section of film will present film after applying indentation and discrete tags.Section 70 can have the

edge

72 and 74 that engages with formation fin seal 14.Also can online 76 places cut separately to pack 10 place at film, can form end

part seal

18 and 20 by sealing bite 62.Can make the folding side package panel that forms of film by the fold line 78 in

box

38 and 80 places.

Be to be understood that, describe in this article and illustrate in order to explain details, material and layout, layered product and the method for the flexible package of packing and the character of method, in claims, in the principle and scope of expressed concrete packing, layered product and method, can make various changes by those skilled in the art.

Claims

1. packing comprises:

Flexible membrane, described flexible membrane limits inner container cavity, and have the relative marginal portion of the first couple of forming the first end sealing, form relative marginal portion and the 3rd pair of relative marginal portion of the second couple of the second end sealing, described the 3rd pair of relative marginal portion forms the longitudinal fin sealing that extends to described the second end sealing from described first end sealing;

Body, described body have the first sidepiece and with described the first sidepiece relative the second sidepiece substantially, described the first sidepiece has described longitudinal fin sealing;

Indentation, described indentation are in the described flexible membrane at described the second sidepiece and form, and are limited to the opening of described container cavity when initial rupture, and are configured to make film to tear end wise towards described the second end sealing diffusion;

Closure label, it covers at least a portion of described indentation, but less than whole indentation; And

Pressure sensitive adhesive, described pressure sensitive adhesive is between described barrier layer and described flexible membrane.

2. packing according to claim 1 is characterized in that, described pressure sensitive adhesive has predetermined affinity between described barrier layer and described flexible membrane, so that described indentation breaks when described barrier layer is removed from the part of described the second sidepiece.

3. packing according to claim 1 is characterized in that, described first end sealing is compared with described the second end sealing, the more close described first end sealing of described indentation.

4. packing according to claim 3 is characterized in that, described indentation is arc.

5. packing according to claim 4 is characterized in that, the concave flanks of described arc indentation seals to described the second end.

6. packing according to claim 3 is characterized in that, described indentation is rectilinear.

7. packing according to claim 3 is characterized in that, described indentation is slightly pointed.

8. packing according to claim 3 is characterized in that, described indentation comprises the paired terminal that further breaks that is configured to stop described flexible membrane.

9. packing according to claim 8 is characterized in that, described terminal configuration is hook portion.

10. packing according to claim 1 is characterized in that, described barrier layer comprises noncohesive crawl section, so that described barrier layer at least a portion from described the second side is removed.

11. packing according to claim 1 is characterized in that, described noncohesive crawl section is curved leading edge.

12. packing according to claim 1 is characterized in that, in case described indentation breaks, described barrier layer extends beyond described indentation to cover marginal space enough around the described indentation with the described opening of seal effectively.

13. packing according to claim 1 is characterized in that, described flexible membrane is laminate structure.

14. packing according to claim 13 is characterized in that, described laminated film structure is the membrane structure of co-extrusion.

15. packaged in flexible film according to claim 13 is characterized in that, described packaged in flexible film comprises the layered product of polyethylene terephthalate and oriented polypropylene, and described layered product has the thickness that is in about 1.5 to 2.5 mil scopes.

16. packaged in flexible film according to claim 13, it is characterized in that, described packaged in flexible film comprises the layered product of polyethylene terephthalate and oriented polypropylene, the layered product of described polyethylene terephthalate has the thickness that is in about 0.4 to 1.0 mil scope, and the layered product of described oriented polypropylene has the thickness that is in about 0.6 to 1.2 mil scope.

17. packaged in flexible film according to claim 1 is characterized in that, described barrier layer is to have the biaxially oriented polypropylene that is in the thickness in about 1.2 mil to 5 mil scopes.

18. packaged in flexible film according to claim 5 is characterized in that, described indentation comprises the paired parallel line of weakness that extends beyond described barrier layer from described curved leading edge.

19. the layered product for the production of flexible package comprises:

Flexible membrane with continuous coiled material of width and longitudinal axis;

Discrete barrier layer, described discrete barrier layer utilize pressure sensitive adhesive and be applied to described continuous coiled material flexible membrane width to mostly and along described longitudinal axis; And

Described continuous coiled material is configured to form into the identical packing of series with described continuous barrier layer and forms blank, the flexible membrane that each identical packing forms blank has the indentation that is formed at wherein, described indentation is consistent with at least a portion of described barrier layer, but not in all barrier layer, and described indentation forms the packing opening subsequently when breaking.

20. layered product according to claim 19 is characterized in that:

Described barrier layer is to have the biaxially oriented polypropylene that is in the thickness in about 1.2 mil to 5 mil scopes; And

Described continuous film is the layered product that has in about 1.5 to the 2.5 mil scopes of being in of polyethylene terephthalate layer and oriented polypropylene layer.

21. layered product according to claim 20 is characterized in that, film laminates can comprise pigment and the round cat paint layer that is arranged between described polyethylene terephthalate layer and the oriented polypropylene layer.

22. one kind is packaged into into the method for series package with On-line Product, comprises the following steps:

Barrier layer is merged to the continuous film volume with the longitudinal edge that separates preset width;

Between described barrier layer and described continuous film volume, stride across less than described preset width but provide adhesives greater than half of described preset width;

Make described continuous film volume partly corresponding to described barrier layer indentation, in order in described continuous film volume, limiting opening when removing described continuous substrate and cause initial rupture;

Form longitudinal sealing along described longitudinal edge;

Becoming to form the rearward end sealing between the serial adjacent packing;

Become to provide product with packaged serially; And

The sealing of formation leading section.