Background technology
Various packing methods and type are known in the art.The considerations of commercial packing comprises as far as the protection of pack content with to the availability of customer or said this packing of pack content user.For example, under the situation of packaged food article (items), these article are sealed in the packing to optimize Keeping life usually.When the customer buys this product, the article that the customer must unpack and wherein store to obtain.But, obtaining article through sealed package and need excessively make great efforts to open this packing sometimes, this can lead to the failure and lose pack content sometimes.
In some packing, like adhesive type packing (stick-pack packages), the end that equally advantageously easily, intactly removes unlap content to topple over fully.For example, when wanting that pack content is poured into when stirring in the solution, as in sapid beverage products, this packing answers gas tight seal not contact with extraneous moisture with the protection content, but also should be easy to opened by the customer.This type of packing is filled with vertical forming usually and Sealing Method (a vertical-form-fill-and-seal process) is made, wherein folding and leakproofing material width of cloth material (a web of material).At a terminal cutting and sealing sealing material, fill with pack content subsequently.Cut subsequently and seal second end, thus pack content is sealed in wherein.Open packing, the user must tear and seal or otherwise sever or tear this packing.
This type of packing is increased various characteristics and open this packing to help the customer.Through a kind of method, open otch at packaging side, like mechanical otch, so that the initial point of tearing this packing is provided to the customer.But this method need should be packed around notch portion in sealing, and this will spend the extra resources of production and energy.Through the known method of another kind, produce defective through the physics wiping technology that weakens packaging side at the lateral edges of packing, make that this packing is more easily located to tear on the edge of when the user applies tearing force with this packing of unlatching.But under this method and above-mentioned incision process, packing will only be torn along the insecure zone that is present in the packing naturally, can not cross this packing straight so that tear.In addition, do not apply excessive chasing after under the power-assisted situation, tear the sealing part that stops at usually along the package length trend the user.
Help another known method of unlatching packing to comprise the edge, make that the crack possibly stretched along this line when unlatching should be packed to alignment reduction packing.A kind of these class methods comprise uses the laser ablation packing.Laser destroys packing along a line that crosses this material, and can not cut this packing fully.Thus, when the user tears when packing, what packing more maybe be along laser damage is partially torn.But when crossing packing one tunnel when drawing with laser that quarter, this was packed, this packing is usually too insecure so that in its manufacturing process or before wanting to open packing, in user's normal process process, pack and can not remain intact.
Patent Application No. 20080273821A1 discloses through the packing that vertical forming is filled and Sealing Method forms, and comprises having the width of cloth material (web material) of sealing with the marginal portion that forms vertical sleeve.This packing also is included in each first terminal seal end of vertical sleeve and second seal end to make sealed package.This packing comprises extends the laser grooving and scribing ablation pattern cross this width of cloth material, and this ablation pattern has about 1 ablating part of separating with the not ablating part of about 0.75 millimeters long by about 0.25 to about 3 millimeters long.The pulling strengrth that this packing has a raising with avoid vertical forming fill and the Sealing Method process in break, and following high likelihood is provided: the outward flange of this packing and vertical seal comprise that probably ablating part is to provide the easily openable of opening this packing regional.Equally, the short air gap between the ablating part has improved to tear along ablation pattern one tunnel and has crossed the possibility that this packing stretches.
Similarly, the packing of continuous ablation that has with the laser calcination can provide easy open function.
At Curwood, the Jeff Hopp of Inc. shows in the paper that is entitled as " Stick Packaging for Powdered and Granular Products:Typical Opening Challenges and Solutions " (it is quoted through this in full and incorporates this paper into) and discloses the key issue of many single part adhesive types packings (stick-pack) on the market and be their opening technology.The adhesive type packing that is used for powdery or pelletized product is to have the drum that the single back of the body seals, and it can be fin seal (a fin seal) or lap seal that the said back of the body seals.The material that is used for adhesive type packing the particularly important is easily tear (in case tearing beginning) so that unlatching easily.Be used for that the structure of wing shape sealing adhesive type packing is normally outer to be the orientation polyethylene terephthalate (OPET) of reverse printed (reverse-printed), the centre is a foil, and inside is the sealant polyethylene layer.The PET of reverse printed provides brand-new, glossiness print surface to be used for outstanding trademark, and has good directional tear performance.Foil provides moisture proof barrier to lump to prevent product, and has resistance to tearing hardly.The PE aquaseal is guaranteed gas tight seal preventing product leakage, and specially preparation so that crisscross or transversely have a minimum resistance to tearing.Adhesive type packing with lap seal has heat seal property polypropylene usually on outer (relative with PET), but because the both sides of film all must be compliant seals.
Tear the common machinery of otch and be applied to the right-handed person customer of adhesive type packing left upper to be fit to tear from left to right.At first will treat the cutout regions heat seal, make otch then in the heat seal district to prevent product leakage or infringement barrier layer.Be usually observed four types of problems in tearing otch adhesive type packing below, 1) packing that can not open; 2) packing of irregular unlatching; 3) packing of partly open only; 4) product leakage or caking also can't distribute.Except the quality problem relevant with tearing otch, the step of increase produces capacity rating and quite seriously influences, and comprising: realize high-quality heat seal and the required slower speed of production of otch; The replacing of end-of-use punch die is expensive and consuming time, causes losing production time; Defective packing (can not open or leak) causes and usually surpasses 5% reject rate.
The packing that is designed to tear given end depends on the use aluminium foil clarity usually, because 1) almost tear aluminium foil unimpededly, and need not to tear initial point and tear beginning, this situation with the oriented polypropylene film of metallization (MET) is different; Or 2) be embedded in aluminium foil in the laminated material and in the laser grooving and scribing technology, reflect rather than absorb laser beam, the penetration that makes it possible to nature control delineation (burning) is requiredly torn initiation and is not damaged barrier property obtaining.But; In case use metallized orientated polymer; Replace aluminium foil like polyolefin; Prior art can not provide satisfactory performance because the metal level of metallized polymer film can not be as aluminium foil reflection lasering beam, power setting that therefore must accuracy control laser is to prevent the catastrophic metal barrier layer that burns and/or lose.Under the situation that does not have suitable laser ablation; Metallized polymer film is torn with will passing the package top clarity; Seal with wing shape or overlapping up to it and to intersect, stop fully, or tear change of direction in some cases and proceed along the package length direction in this some place process of tearing.
Therefore, need development new technologies, make it possible to 1) remove package top fully; 2) easy and cheap Fabrication procedure; 3) through using stretching polymer film, eliminate needs to paper or foil material like single shaft or Biaially oriented polypropylene (OPP) film.
Summary of the invention
Summary of the invention
In certain embodiments, present disclosure relates to a kind of packing, comprises:
A. the width of cloth material that has first marginal portion and second marginal portion; Said first marginal portion and said second marginal portion be sealed together to have two with formation and seals terminal sealing; Saidly be packaged in one and seal the end and have first casing end and seal the end and have second casing end at another;
Wherein said first casing end and said second casing end define the first packing lateral edges and the second packing lateral edges; Wherein said first packing lateral edges and the said second packing lateral edges comprise folding width of cloth material, and wherein said sealing is that fin seal or overlapping seal;
B. be positioned at first on the said first packing lateral edges and tear initial point; With
C. second tear initial point, wherein said second tears initial point is positioned on the said fin seal, and said fin seal is folded to the said first packing lateral edges; Or wherein said second tear initial point and be positioned on one of said marginal portion, and one of said marginal portion is folded to the said first packing lateral edges.
Aspect some of above-mentioned embodiment, the width of cloth material of present disclosure comprises polymer film, preferred polyolefm film, more preferably orientation polyolefine film, for example oriented polypropylene (OPP) film.In some preferred embodiment, this polymer film has sealable outermost layer, and it makes this fin seal be sealed to the packing sidewall downwards guaranteeing to tear characteristic alignment (alignment), or makes it possible to form overlap and seal.In other embodiments, this polymer film is a multi-layer polymer film, comprises sandwich layer and at least one skin covering of the surface, and preferred at least one tack coat.In a kind of preferred embodiment, at least one skin covering of the surface is salable layer.
In some preferred embodiment, the packing of present disclosure is through vertical forming filling and Sealing Method or horizontal moulding filling and Sealing Method (a horizontal-form-fill-and-seal process) formation.
DESCRIPTION OF THE PREFERRED
Describe various specific embodiments, version and embodiment among this paper, comprised the exemplary of the present invention and the definition that are used to understand the requirement protection.Though following detailed description has provided specific preferred embodiment, those skilled in the art will recognize that these embodiments only are exemplary, and the present invention can otherwise implement.In order to confirm infringement, scope of the present invention is with reference to any one or multinomial of accompanying claims, comprise they equivalents and with said key element that those are equal to or restriction.Any " invention " of mentioning possibly be meant or the multinomial invention that is defined by the claims, but is not necessarily all inventions.
As used among this paper, " poly-mer " can be used for referring to homopolymer, copolymer, interpretation, terpolymer or the like.
As used among this paper, " packing " can be used for referring to envelope (packet), leak free, packing, basically leak free or basically the packing width of cloth material.
Pack,, comprise having the width of cloth material of sealing with the marginal portion of formation sleeve as through packing that vertical forming is filled and Sealing Method forms or the packing that forms through horizontal moulding filling and Sealing Method.This width of cloth material also is included in first seal end and second seal end of each end of sleeve to make packages sealed.This packing comprises that at least two are torn initial point.Tear initial point for one and be positioned at the sealing of the packing that is used to have fin seal (or being used to have one of the marginal portion of sealing of the packing of sealing that overlaps), another is torn on one of the lateral edges that initial point is positioned at this packing.For having the packing that overlaps and to seal, first tears initial point is positioned on the first packing lateral edges, and second tears initial point is positioned on one of marginal portion that the overlapping towards the first packing lateral edges seals.For the packing with fin seal, first tears initial point is positioned on this fin seal, and second tears initial point is positioned at fin seal on the packing lateral edges that it is folded to.Under two kinds of situation; First tears initial point and second tears initial point and crosses this packing; Preferably be substantially perpendicular to packing side edge-justified calibrations (aligned); Make and on the packing lateral edges, to tear the initial point place when applying separating force as the user that this two of packing edge connection is torn the line of initial point and crossed this and seal basically and tear.
So construct, this packing provides the user can tear the airtight containers of the line unlatching of initial point along two of connections.This packing can be equipped with to be poured another container into or directly pours the food in customer's mouth into, like coffee beverage powder, sweet food powder, snacks nut, flavoring additives with gravy with meat or vegetables poured over rice or noodles.The layout of tearing of present disclosure comprises that two described in this paper are torn initial point.The said layout of present disclosure provides the width of cloth material of the pulling strengrth with raising; Avoiding breaking in the vertical forming filling of routine and Sealing Method or horizontal moulding filling and Sealing Method process, and the district of tearing of the light startup (easy-to-start) of opening the packing that has wide pouring opening is provided for the user.Similarly, two of present disclosure layouts of tearing initial point provide cross this packaging seal easier to tear extension.Equally; The tearing of present disclosure arranged to have improved and torn along connecting the extend possibilities of (a tunnel crosses this packing) of two lines of tearing initial point; So that the end of this packing can relatively easily and fully be removed, so that obtain the content of this packing without restriction.
When as detailed below is thoroughly looked back and studied, these will become clearer with other benefit.Referring now to accompanying drawing, particularly Fig. 1 and 2 instructs consistent packing embodiment with proposition and many these.Packing 10 comprises having the width of cloth material 12 that is sealed in first marginal portion 14 of sealing in 18 and second marginal portion 16 relative with first marginal portion 14 together.This packing 10 is included in first seal end 20 of sealing 18 first terminal 22 places and in second seal end 24 at second terminal 26 places of sealing 18.Any above-mentioned sealing can be passed through the conventional approach manufacturing, said conventional approach comprise for example apply heat with pressure with the manufacturing lamination seal.Avoid the external factor influence with these contents that seal protective packing 10, influence the moisture and/or the oxygen of content quality like meeting.
This first seal end 20 and second seal end 24 define the first packing lateral edges 28 and the second packing lateral edges 30, and wherein to pack lateral edges 30 are the folded web that between the edge of seal end 20 and 24 and by the edge of seal end 20 and 24, form to the first packing lateral edges 28 and second.Said folded web can maybe can be the circular portion that carries out the transition to the width of cloth material at the back side from the front of packing 10 along broken line 15 and 17 backfins so that better for the user limits lateral edges.
Continuously with reference to figure 1,2 and 3, packing 10 comprises that also being positioned at one of packing lateral edges tears initial point 31 and 32 with sealing on 18.Tear initial point for two and preferably be substantially perpendicular to the packing side edge-justified calibrations.
Adopting this type of to tear initial point arranges; When the user tears the initial point place when applying separating force on the packing lateral edges shown in Fig. 3 and 4; Packing 10 is torn the line of initial point and is crossed and seal 18 and tear basically along connecting two, and can not depart from this line basically.This layout has greatly been improved the simplification when packing 10 begins to tear, and crosses and seal 18 and tear continuously, and can obviously not improve the tearing force that the user applies.So construct, the user can more easily remove whole casing end so that kind discharges pack content 11 as shown in Figure 5.In addition, this width of cloth material 12 keeps enough pulling strengrths not break basically to tolerate vertical forming filling and Sealing Method or horizontal moulding filling and Sealing Method.
With reference now to Fig. 2 and 6 to 9,, sealing of 14 to second marginal portions 16, first marginal portion of this width of cloth material 12 18 can comprise sealing of any kind known in the art, but will comprise fin seal 52 usually or overlap and seal 62.This type of seals in this area is known, but for clarity sake will briefly describe.With reference to figure 6 and 7, the interior section 46 of the marginal portion 14 of winning is contacted with second marginal portion 16, form fin seal 52 thus.These marginal portions are sealed and are folded to packing 10, form thus " wing ".As shown in Figure 7, to tear initial point 31 for one and be positioned on the fin seal 52, another is torn initial point 32 and is positioned at the position of fin seal 52 on its folding packing lateral edges.
With reference to figure 8 and 9, through folded web 12 win one of marginal portion 14 and second marginal portion 16 are overlapped on another, forming thus overlaps seals 62.For example, Fig. 8 has shown first marginal portion 14 that overlaps with second marginal portion 16.These marginal portions are sealed subsequently, and do not need the folded part of similar fin seal 52.This first is torn initial point 32 and is positioned on any of said packing edge.This second tear initial point 31 be positioned at be folded to have first tear initial point the sealing on one of terminal (as shown in Figure 8 14) of packing edge.Seal at another and can have the optional additional initial point (one or more) of tearing on end.
With reference to Figure 10 the method according to the instruction manufacturing packing 10 of present disclosure is described.This method comprise with width of cloth material 12 send into that vertical forming is filled and Sealing Method equipment 200 in and on sealing, make and tear initial point.This width of cloth material 12 vertically seals to form at least one and seals 18, and reach in vertical forming filling and Sealing Method equipment 200.This width of cloth material 12 passes at least one and seals 18 horizontal seal and cutting at first terminal 22 places of packing 10.Cut this width of cloth material 12 at second terminal 26 places of packing 10 subsequently.Vertical forming fill and Sealing Method during or make on this width of cloth material through laser beam or machine cuts afterwards and tear initial point 31 and 32.
Although vertical forming described in Figure 10 is filled and Sealing Method equipment 200 is designed to make fin seal, said method can be used for any other packaging seal described in this paper, comprises the seal package that for example overlaps.
Although the vertical forming described in for example clear Figure 10 is filled and Sealing Method equipment 200.The packing of present disclosure can also form through horizontal moulding filling and Sealing Method.
In another embodiment of present disclosure, sealing terminal 20 is as shown in Figure 11 L shaped, wherein tears initial point 32A and is positioned on the sealing area to improve the integraty of packing.The L type of tearing initial point 32A place seals preferably not and seals 18 and overlap.
In another embodiment of present disclosure shown in figure 12, this is torn initial point 32B and is positioned at and seals on terminal 20 to improve the integraty of this packing.When the user tears initial point 32B place when applying separating force on this packing lateral edges, this packing is torn the line of initial point and is crossed to seal basically and tear along connecting two.
In certain embodiments, this tears initial point through machine cuts, laser grooving and scribing or any other method manufacturing known in the art.
In preferred embodiments, this width of cloth material comprises the OPP film, preferred metallized OPP film, cavitation corrosion OPP film (cavitated OPP film) or the like.
Tear initial point for two and be substantially perpendicular to the packing side edge-justified calibrations.Used term " perpendicular " refers to that to tear the line of initial point be 90 ± 45 degree with angles between the packing lateral edges connecting two among this paper, preferred 90 ± 30 degree, and most preferably 90 ± 15 spend.
The width of cloth material that can be used for present disclosure comprises and has at least one layer, the i.e. polymer film of sandwich layer, optimization polypropylene film.This polymer film can further comprise additional layer (one or more), like skin covering of the surface, sealant layer, tack coat, metal deposition layer and combination in any thereof.This polymer film can be single shaft or biaxial orientation.
In certain embodiments, this width of cloth material can comprise acrylic polymers, ethene polymers, isotactic polypropylene (" iPP "), high-crystallinity polypropylene (" HCPP "), low-crystallinity polypropylene, isotaxy and syndiotactic polypropylene, ethylene-propylene (" EP ") copolymer and combination thereof.
In a kind of preferred embodiment, this width of cloth material is the iPP homopolymer.The instance of suitable commercially available iPP comprises: from the PP4712E1 of ExxonMobil Chemical Company with from the Total Polypropylene 3371 of Total Petrochemcials.The instance of available HCPP is Total Polyproplene 3270 (can available from Total Petrochemicals).
In certain embodiments, provide the appearance cortex as sealant layer well known by persons skilled in the art.
This width of cloth material can be single shaft or biaxial orientation.Orientation extruding on the direction is called vertically (" MD ") orientation.Be called laterally (" TD ") orientation perpendicular to the orientation of extruding direction.Can at first also then on the TD direction, stretch on the MD direction or draw film and realize orientation.Depend on required film characteristic, orientation can be in order or simultaneously.Preferred orientation ratio usually on the MD direction for extruding about three times to about six times of width, be to extrude about four times to about ten times of width on the TD direction.
One of outer exposed surface of width of cloth material or both can carry out the surface energy that surface treatment improves film, but make this film metallization, coating, printing-ink and/or lamination thus.Can carry out this surface treatment according to one or more methods known in the art.Preferable methods includes but not limited to bunch discharge, flame treatment, plasma treatment, chemical treatment or by the processing of polarization flame.
Outside face of this width of cloth material one or both of can metallization.Usually, coating metal layer is one of appearance cortex and/or sealant layer.This type of layer can adopt the conventional approach metallization, like the metal level of vacuum moulding machine such as aluminium, copper, silver, chromium or its compound.
The width of cloth material that can be used for present disclosure does not comprise metallic paper, like aluminium foil.
In other embodiments, present disclosure relates to the method for making packing, comprising:
A. form the packing that comprises width of cloth material with first marginal portion and second marginal portion; Said first marginal portion and said second marginal portion be sealed together to have two with formation and seals terminal sealing; Saidly be packaged in one and seal the end and have first casing end and seal the end and have second casing end at another;
Wherein said first casing end and said second casing end define the first packing lateral edges and the second packing lateral edges; Wherein said first packing lateral edges and the said second packing lateral edges comprise folding width of cloth material, and wherein said sealing is that fin seal or overlapping seal;
B. form and be positioned at first on the said first packing lateral edges and tear initial point; With
C. form second and tear initial point, wherein said second tears initial point is positioned on the said fin seal, and said fin seal is folded to the said first packing lateral edges; Or wherein said second tear initial point and be positioned on one of said marginal portion that said overlapping seals, and one of said marginal portion that said overlapping seals is folded to the said first packing lateral edges.
In some aspects, step (a) comprises vertical forming filling and sealed package or horizontal moulding filling and sealed package.
In others, before forming this packing, form first and tear initial point and/or second and tear initial point, or this first tears initial point through machine cuts formation in the said sealing area that seals one of end through this width of cloth material of laser grooving and scribing.
In others again, machine cuts that one of maybe should overlapping sealing edge part through this fin seal forms this and second tears initial point.