CN103415446A

CN103415446A - Pouch having concavely-curved corners

Info

Publication number: CN103415446A
Application number: CN2011800645769A
Authority: CN
Inventors: G·巴塔查尔吉; 马哲
Original assignee: Procter and Gamble Ltd
Current assignee: Procter and Gamble Ltd
Priority date: 2011-01-10
Filing date: 2011-12-02
Publication date: 2013-11-27
Also published as: BR112013016169A2; ZA201304725B; MX354094B; RU2013130652A; RU2669741C1; WO2012094773A1; WO2012094791A1; MX2013008079A; EP2663504A4; EP2663504A1; JP2014502585A

Abstract

A pouch (100) has a sheet (120) containing at least one layer of a film material. The sheet forms a tube (142) that is closed with a seal (122) to form a volume (144). The seal (122) contains a first edge (128) and the sheet contains a second edge (130) in connected relation to the first edge (128). A curved seal (132) joins the first edge (128) with the second edge (130). A sealing jaw (150) and a method for forming such a pouch are also described.

Description

Pouch with recessed crank throw angle

The cross reference of related application

The present patent application requirement is filed in the rights and interests of a PCT Chinese patent application CN2010/000038 on January 10th, 2011.

Technical field

The present invention relates to pouch.Particularly, the present invention relates to the pouch of the sealing formed by membrane material.

Background technology

Pouch is normally by layered product or film formed, and can be used for keeping being permitted eurypalynous article, such as food, shampoo, washer solvent, medicine etc.In order to prevent their seepages, usually they are all being sealed to form fixing volume, to hold product for example graininess or liquid detergent on side.Yet, pouch waste and anti-break and the intensity of seepage between to find balance be a challenge always.The intensity of sealing member and seal area self are directly proportional.If with excessive seal area, seal pouch on side, the given volume of every area film is just less, thereby causes the waste of film.Yet if seal area is too narrow, if if drop or telescope with other pouches in shipment or during showing, pouch will easily break.

Usually with the straight sealing member that forms about 90 ° of angles, seal pouch.Although this is the method for a kind of actv. sealing top and bottom, have now found that this causes the main body of pouch easily in response to sudden surge, to be pierced, such as when pouch drops, when other things drop on pouch etc.This type of sudden surge before can occurring in and opening and using whenever, such as during filling/manufacturing process, shipment, storage, transportation, displaying etc.This type of is worthless pierces through and causes waste, dirty and messy, product loss etc., and in some cases, client even may refuse to buy the product in the pouch be pierced.

Existing in order to the stronger packing technique of the method utilization addressed this problem and adhesives, stronger film and the different layered product layer in little bag material and/or membrane material.Yet all these methods increase complexity usually, and requirement exceeds the special ability of the limit of power of the machine that forms, fills and seal.

Therefore, need a kind of pouch of improvement, its more anti-piercing through, especially in the situation that utilize existing membrane material, encapsulating method and sealing machine.

Summary of the invention

The present invention relates to the lamellated pouch of a kind of tool, described thin slice comprises at least one membrane layers.Thin slice forms pipe, and described effective sealing member comes closed to form volume.Sealing member comprises the first edge, and thin slice to comprise with the first edge be the second edge of annexation.Crooked sealing member is by the first edge and the second edge joint.

The sealing intermediate plate comprises seal arm and receives arm.Seal arm comprises sealing area, and described sealing area also comprises the sealing member forming element of the bending of the first edge forming element and adjacency the first edge forming element.The first edge forming element forms the sealing member of the bending that is adjacent to the first edge forming element.

A kind of be used to sealing the method for pouch, comprise the following steps: thin slice is provided; By thin slice, formed the pipe with leading edge; The sealing leading edge is to form the leading edge sealing member; Product filling tube with scheduled volume; Sealed tube is to form the trailing edge sealing member; And after the trailing edge sealing member, cut pipe to form pouch.Leading edge sealing member and trailing edge sealing member form volume between them, and this volume comprises product.At least one in leading edge sealing member or trailing edge sealing member comprises the sealing member of the bending at the first edge and adjacency the first edge.

Have now found that, the power that drops in shipment or during showing when the pouch of for example filling by passivation or be subject to while telescoping other pouches, the present invention can reduce piercing through main body significantly.

The accompanying drawing explanation

Although this specification sheets is drawn a conclusion by claims, wherein particularly point out and clearly claimed the present invention, it is believed that by the following drawings explanation and can understand better the present invention, in accompanying drawing, identical reference number means identical element, and wherein:

Fig. 1 is the front elevation of an embodiment of the pouch of this paper;

Fig. 2 is the cutaway view as the pouch of being seen Fig. 1 of 2-2 along the line;

Fig. 3 is the existing relatively front elevation of pouch;

Fig. 4 is the existing relatively front elevation of pouch;

Fig. 5 is the existing relatively front elevation of pouch;

Fig. 6 is the front elevation according to an embodiment of seal arm of the present invention;

Fig. 7 is the front elevation according to an embodiment of reception arm of the present invention;

Fig. 8 is the front elevation of an embodiment of the pouch of this paper;

Fig. 9 A is the partial front elevation view of an embodiment of the pouch of this paper; And

Fig. 9 B is the partial front elevation view of an embodiment of the pouch of this paper.

Accompanying drawing herein may not be drawn in proportion.

The specific embodiment

Except as otherwise noted, the whole temperature of this paper all with degree centigrade (℃) mean.Term used herein " comprises " and refers to and can add other steps, composition, element of net result being there is no to adverse effect etc.This term contain term " by ... form " and " basically by ... composition ".

As used herein, the term " fabric " intensifier " comprise the composite that provides fragrance, flexibility, antistatic beneficial effect and/or the shape of improvement to keep beneficial effect to fabric is provided, such as fabric conditioner and/or fabric softener.This type of fabric intensifier is intended to work in the rinse cycle of clothes washing process usually.

The disclosure relates to the lamellated pouch of a kind of tool, and described thin slice comprises at least one membrane layers.Thin slice forms pipe, and described effective sealing member comes closed to form volume.Sealing member comprises second edge at the first edge and adjacency the first edge.The first edge and the second edge form crooked sealing member.The disclosure also relates to the method and apparatus for the preparation of this type of pouch.

Referring to the figure of this paper, Fig. 1 is the front elevation of an embodiment of pouch 100, and it comprises the thin slice 120 that is shaped as pipe (see Fig. 2 142).Pouch is formed by thin slice, and described thin slice is formed by least a membrane material then, and described membrane material is selected from polyamide (nylon), polyethylene, polypropylene, ethyl-ethyl acetate, poly--4-methylpentene-1, microporous barrier and their combination usually; Or polypropylene, polyethylene terephthalate and their combination of polyamide (nylon), linear low density polyethylene, orientation.In general, membrane material more soft and that have more stretchability also can reduce and break, so this paper can be used and extrudes lamination, co-extrusion laminating and the membrane material blend such as polyethylene and polyethylene terephthalate.

Membrane material also is attachable to metal and/or comprises therein metal, and/or is metalized film.Membrane material is well known in the art, and can comprise art work, additive (that is, UV retarding agent, antimicrobial, dyestuff, pigment etc.) of resin, layered product, printing etc.Suitable membrane material is purchased from global all kinds of suppliers, such as 3M Company(St.Paul, Minnesota, USA), Du Pont Co.(Wilmington, Delaware, USA), Toppan Insatsu Co.(Tokyo, Japan), Gelman Sciences Company(Ann Arbor, Michigan, USA) and global many other suppliers.The thin slice of this paper can comprise simple layer or comprise a plurality of layers of one or more identical or different membrane materials, as long as its maintenance is salable.Thin slice is generally approximately 15 μ m to about 220 μ m, or approximately 20 μ m to about 200 μ m, or approximately 25 μ m to approximately 160 μ m are thick.Each single membrane material of planting can be on demand for orientation or random.

A plurality of membrane layers can be bonded together to form the thin slice with multifrequency nature and/or beneficial effect.In such cases, known in the art thatly by such as lamination, heat seal, ultrasonic sealing, gluing, pressure sealing etc., described a plurality of layers are bonded together.

Then thin slice 120 can be shaped as pouch 100 in the following manner: around forming tube (not shown) tractive and/or stretching thin slice 120 by thin slice 120, to form pipe.Manage following formation: in any direction such as vertical upper at any some place or the continuously edge of sealing sheet 120, and/or by leading edge and/or trailing edge place, sealing these edges in the horizontal.Forming tube doubles as filling tube, thereby the product that will be included in pouch is filled in pipe (see Fig. 2 142) by described filling tube.At vertical (A) upper tractive or advance thin slice, and sealing intermediate plate (by seal arm and receive arm form) (see Fig. 6 150 and Fig. 7 170) rear portion that side by side seals and cut pipe (see Fig. 2 142) on laterally (B).This side by side discharges the pouch of filling and forms new sealing member 122 at leading edge 124 places.Machine and the technology that is used to form the pouch of this type of filling is often referred to as " automatic packaging machine " and is well known in the art, and purchased from global a plurality of suppliers.Automatic packaging machine also usually is described as be in wire wrapping machine and sealer in the industry, and/or is shaped-fills-sealing (FFS) machine.

Therefore, in Fig. 1, at vertical (A) upper sealing sheet 120 to form fin seal part 126, thereby produce pipe continuously (see Fig. 2 142).Then by sealing intermediate plate (by seal arm and receive arm form) (see Fig. 6 150 and Fig. 7 170) seal leading edge 124, usually in laterally (B) upper sealing, with the volume that is formed on sealing member 122 place's closures (see Fig. 2 144).

In Fig. 1, sealing member 122 is leading edge sealing member 122 ', and comprises the first edge 128 and the second edge 130.The first edge 128 and the second edge 130 form crooked sealing member 132 between them.In Fig. 1, in one embodiment, whole 4 turnings of pouch comprise crooked sealing member 132, and crooked sealing member has radius r, the curvature of the sealing member that described radius restriction is crooked.The radius r of crooked sealing member is greater than about 3mm usually, or about 10mm is to about 30mm, or about 5mm is to about 20cm, or about 5cm is to about 20cm.Be not intended to bound by theoryly, it is believed that the validity of too little radius is identical with right angle, and too large radius reduce the active volume that can hold product in pouch the most at last.Therefore, it is believed that can the balance puncture resistance and effective use to membrane material for above scope.In addition, the above scope of the radius of crooked sealing member is for little respond well with large two kinds of bags, because the purpose of crooked sealing member is the impact at passivation right angle.Crooked sealing member 132 is recessed songs, and this center c that refers to radius r is in volume 134, and described volume comprises the product (not shown), rather than center c is arranged in sealing member 122 (comparative example such as Fig. 5), or even outside pouch 100.In the embodiment of this paper, pouch comprises a plurality of turnings, or about 3 turnings to about 6 turnings, or about 4 turnings to about 5 turnings, or about 4 turnings, and each turning comprises crooked sealing member.In the embodiment of this paper, the radius of the sealing member that each is crooked is approximately identical.In the alternative embodiment of this paper, at least 2 turnings, or approximately 2 turnings to the about radius at 4 turnings is different.

Be not intended to bound by theoryly, it is believed that typical pouch comprises right angle or acute angle even around the corner, in the edge intersection of described corner leading edge sealing member and/or trailing edge sealing member and standard pouch (seeing Fig. 3-5).It is believed that now that it is all that granular product by a small amount of causes that standard pouch (seeing Fig. 3-5) such as those many that comprise granular laundry detergent pierce through, described granular product accumulates in the turning of pouch, and can comprise thereafter this formation boomerang shape sharp corner of a small amount of air or other graininess Chan Pin –, and when pouch because of such as dropping, fall, another pouch clash into it etc. while being subject to impacting, described a small amount of granular product is forced to rush at turning with relatively high speed.Owing to by these sides and the formed angle of sealing member, being acute angle or right angle, therefore the power of described a plurality of moving particles concentrates on the single point in turning.But these multiple high speed impact weakened film materials and/or even cause described main body or the surface because being subject to this impact, break.Therefore, even each particle self is very light, but the accumulation of material in turning is impacted and may be caused film to be torn internally, and cause the membrane material at pouch main body place to lose efficacy, thereby cause pouch from described main body seepage.

By contrast, the pouch of this paper comprises corner region 134, and wherein thin slice 120 is to seal with crooked sealing member 132.Be not intended to bound by theory, the power of described a plurality of moving particles that it is believed that crooked sealing member passivation.Also it is believed that crooked sealing member has been distributed to this power on larger zone, rather than it is concentrated.Therefore, membrane material keeps its integraty, and not too is easy to break or lost efficacy.Typical pouch has about rectangle or foursquare 2 dimension faces, so pouch edge 136 will still form right angle β usually.This type of pouch (also seeing Fig. 3-5) is prevailing pouch and the most easily preparation.Due to crooked sealing member 132, be adjacent to the first edge 128 formed by sealing member 122, this means for the typical pouch 100(of this paper as shown in fig. 1), the second edge 130 is formed by the edge 136 of pouch 100 usually.Leading edge 124 and trailing edge 138 can comprise similar sealing member 122, comprise the sealing member 132 of similar bending.In the embodiment of this paper as shown in Figure 1, trailing edge sealing member 122 " comprise the first edge 128, the second edge 130 and crooked sealing member 132.One skilled in the art will appreciate that the order of trailing edge and leading edge can be put upside down (than Fig. 1) in some vertical shaping/fillings/sealing (VFFS) machine.

In Fig. 1, trailing edge 138 also comprises a plurality of shanks hole 140 to allow more easily to carry pouch 100.In the embodiment of this paper, pouch comprises at least 1 shank hole, or about 1 shank hole to about 5 shank holes; Or approximately 2 to about 3 shank holes, or about 2 shank holes.These shanks Kong De center is usually located at the top at pouch center, carries in order to be easier to.Be not intended to bound by theoryly, it is believed that single shank hole is most convenient for the user usually; Therefore in the embodiment of this paper, pouch comprises 1 shank hole.Yet, if there is fin seal part 126, cut the wearing and tearing that this type of single shank hole has increased the one or more cutting blades on seal arm (see Fig. 7 160).Have even number shank hole and can reduce the needs of wearing the fin seal part to cutting, yet, have 4 or more shanks hole and make the user feel chaotic.Therefore, in the embodiment of this paper, pouch comprises 2 shank holes.

Fig. 2 is the cutaway view as pouch 100 in being seen Fig. 1 of 2-2 along the line.People can clearly see thin slice 120 and by thin slice 120 is joined at fin seal part 126 places, self be shaped as pipe 142.This pipe 142 also at far-end by sealing member 122 sealing, this thus define volume 144.Volume 144 can comprise the product (not shown) therein, and it is not overflowed to protect, the impact of moisture, ambient atmosphere etc.Therefore, in Fig. 2, pouch is shaped as this area common alleged " pillow formula pouch " or " pillowcase ".Although pouch can be shaped as other pouches such as Angle supporting bag, side door bag, butt-ended bag etc., it is believed that as herein described to pierce through problem especially obvious in pillowcase.Therefore, in one embodiment of the invention, pouch is pillowcase.

The product (not shown) be filled in pouch has 250g/L at least usually, or about 300g/L is to about 1.3kg/L, or about 450g/L is to the bulk density of about 1.1kg/L.In one aspect, this product is generally granular product; Or fine particle shape product, such as having the about 10 μ m granular product to the equal median particle of number of about 5mm.In the embodiment of this paper, described fine particle shape product is detergent granules, granulo-fertilizer, graininess fabric intensifier, mineral in granular form and/or graininess medicine; Or granular laundry detergent and/or graininess fabric intensifier.On the other hand, this product is liquid product.Term " liquid " is used for comprising widely such as compound, solution, dispersion, emulsion etc. in this article.Described liquid can be low viscosity (LV) to high viscosity, comprises gel and paste, such as at the most approximately 10, and 000mPas, about 100mPas is to about 1000mPas, or about 300mPas is to about 500mPas.Described liquid can comprise the active component that is suitable for various application, such as household products and the consumables (cleaning and inorganic agent, dish and hard surface cleaners, shampoo, shower additive etc. such as clothes washing).In the embodiment of this paper, described liquid product is liquid laundry detergent or liquid fabric intensifier.

Volume 144 can be airtight maybe can allowing air to flow into and or elution volume 144.In the embodiment of this paper, when forming and fix whole sealing member, described volume is airtight (or basically airtight); Only when piercing through, it just allow air and/or graininess or liquid product easily enter or discharge described volume.This type of airtight pouch is typical current bag, and it comprises for example granular laundry detergent described in these examples.In another embodiment of this paper, pouch can allow air to flow out described volume in the following manner: such as having valve, allow the seal designs that air passes therethrough (seeing such as the U.S. Patent Publication 2009/226573A1 that authorizes the people such as Gonzales that is published on September 10th, 2009) and/or have the aperture be formed into wittingly in pouch.Yet in such cases, air only can be overflowed from described volume usually relatively lentamente, therefore the problem that pierces through due to the caused corner of sudden surge still exists.Be not intended to bound by theoryly, it is believed that and allow therein air to discharge fast in the pouch of pouch, exist and break and/or pierce through problem indistinctively.

Normally (when when sealing) 500mL, or about 500mL at least is to about 100L for the scope of described volume, or about 800mL is to about 60L, or about 1L is to about 30L, or about 1.5L is to about 20L.Usually pouch will comprise therein product and air (or gas of another kind of type) both because in the situation that in package, there is no air (being vacuum-packed package), product does not move, and does not therefore have problems.Therefore, in the embodiment of this paper, pouch comprises air therein, and the product in pouch is not vacuum-packed.

Fig. 3 shows the front elevation of existing pouch 100 ', and it lacks crooked sealing member at each 146 place, volume turning.Pouch 100 ' is a kind of typical pillowcase, and it has fin seal part 126 and sealing member 122 in leading edge 124 and trailing edge 138 places.Edge 136 and sealing member 122 form the typical angle δ of 90 ° basically.Usually, this angle each place in described 4 volume turnings 146 is repetition.

Similarly, Fig. 4 shows a kind of front elevation of existing relatively pouch 100 ', and it has all the continuous sealing member 122 basically around its periphery.This type of pouch 100 ' is usually by two independently membrane material thin slice 120,120 ' formation, and described thin slice seals to form therein volume 144 at 136 places, whole edges.This type of pouch 100 ' also has the angle δ of 90 ° basically usually, and wherein sealing member 122 forms volume turning 146.Usually, this angle each place in described 4 volume turnings 146 is repetition.

Fig. 5 shows the existing relatively front elevation of pouch 100 ', and its each place in volume turning 146 has the sealing member 148 of protruding song.It is said that creating this embodiment is in order to solve and the similar problem that pierces through described herein; Yet it is unsuccessful.In Fig. 5, the center c of radius r is arranged in sealing member 122, and not in volume 144.

Fig. 6 shows the front elevation of an embodiment of seal arm 150 of the present invention.Seal arm 150 and receive arm (see Fig. 7 170) for good and all or temporarily toward each other to form sealing intermediate plate (not shown).Seal arm 150 comprises the sealing area 152 that is used to form sealing member (see Fig. 1 122).Sealing area 152 also comprises the first edge forming element 154 that is connected to crooked sealing member forming element 156.Crooked sealing member forming element 156 has recessed angle, and described angle has center c and radius r.

In the embodiment of Fig. 6, seal arm 150 comprises heater element 158 on the dorsal surface of seal arm 150, melting that described heater element keeps the enough heat of sealing area 152 so that thin slice (see Fig. 1 120).One skilled in the art will appreciate that many in order to one or more foil seal are suitable for the method and apparatus for preparing sealing member (see Fig. 1 122) together, such as, heat seal, ultrasonic sealing, pressure sealing, adhesive seal etc.In the embodiment of this paper, sealing member is by heat seal and/or ultrasonic sealing; Or heat seal forms.

In Fig. 6, sealing area 152 ends in cutting blade 160, described cutting blade cutting pouch (see Fig. 1 100), and sealing area 152 is sealed one or more thin slices (see Fig. 1 120) simultaneously.If people do not wish to separate practically single pouches, but wish to make them continuous, for example be long band, cutting blade 160 can be replaced pin in a row or a row is interrupted cutting blade, with preparation example as perforation.Additive method and element for the preparation of weak line are also known in the art.In addition, as one of ordinary skill in the art will recognize that, one or more cutting blades should have enough structure integrities and durability with whole layers of penetrating pouch fully and also be oriented to the pouch easily discharged after preparing sealing member and perforation.In the embodiment of this paper, the height of cutting blade is about 1cm to about 10 μ m, or about 5mm is to about 20 μ m, or about 2mm is to about 40 μ m, if vertically measured from the surface of seal arm 150.Cutting blade can be straight, jagged, crooked etc. on demand.In the embodiment of this paper, cutting blade can be perpendicular to the surface of seal arm, or can be angled in the vertical.Be not intended to bound by theory, it is believed that if cutting blade perpendicular to the surface of seal arm, cutting blade will more effectively form cutting under slower machine speed.Yet, it is believed that under automatic packaging machine speed faster, the pouch that angled cutting blade can discharge more quickly on the direction that package flows, thereby the obstruction of minimizing automatic packaging machine, described obstruction was lost efficacy and was fallen down and cause from seal arm by the pouch completed.

In the embodiment of this paper, can use a plurality of sealing intermediate plates, make and for example can have a sealing intermediate plate with the top of sealing pouch and it is cut away, and independence but contiguous sealing intermediate plate can side by side seal the bottom of next pouch.

Seal arm 150 also comprises optional seal ridge 162, and described seal ridge can provide the sealing member of veining.The sealing member of this type of veining can be desired to produce sealing member such as more easily clamping to strengthen sealing intensity, reason attractive in appearance etc. in some cases.

In the embodiment of this paper, the sealing intermediate plate is designed such that it can cut shank by for example comprising the shank cutting element in sealing member.This type of shank cutting element also can be formed by for example one or more cutting blades.

Fig. 7 is the front elevation of an embodiment of reception arm 170 of the present invention.Receive arm 170 and be complementary to seal arm (Fig. 6 150), and be its mirror image, comprise with the sealing area 152(of seal arm and see Fig. 6) the complementary sealing area 152 that mates.Receive arm 170 and comprise cutting groove 172, described cutting groove is generally indenture or the depression in the surface that receives arm 170, and it allows one or more cutting blades (Fig. 6 160) etc. to cut to wear thin slice and form corresponding cutting, perforation etc.Receive arm 170 and also comprise seal ridge 162 to be complementary to those on seal arm (Fig. 6 150).

In the embodiment of this paper, one or more cutting blades are attached to seal arm releasedly, make when it weares and teares that it can be removed, sharpening and/or replacement and without manufacturing brand-new seal arm.

Seal arm 150, receive arm 170 or both and interact actively with on demand by such as heat seal, ultrasonic sealing, pressure sealing etc., forming sealing member, therefore comprise therein or thereon suitable packing technique, such as temperature booster, ultrasonic generator, pressing jig etc.Seal arm and reception arm are formed by the durable material that is applicable to their purposes in this article usually independently of one another, for example metal, pottery, plastics and their combination.Be intended to for thermosealed sealing intermediate plate should intensity high and heat conduction is good, and can be by such as copper, brass, steel or iron, aluminium etc., forming.Pulse and induction sealing method are known in the art and for this paper.Based on the disclosure, can be customized by global all kinds of suppliers and/or machine factory according to seal arm of the present invention and reception arm.

The sealing intermediate plate that it will be appreciated by those skilled in the art that this paper can be used on automatic packaging machine.

Fig. 8 shows the front elevation of an embodiment of the pouch 100 of this paper, and it comprises and has across the sealing member 132 of the single bending of the relatively large radius r of whole leading edge 124 and the sealing member 132 had across the single bending of the relative large radius r of whole trailing edge 138.

In an alternate embodiment (not shown), the sealing member with single bending of identical center and radius also forms the sealing member of the bending of leading edge and trailing edge.

Fig. 9 A shows the partial front elevation view of an embodiment of pouch 100, and it comprises the sealing member 132,132 ' of a plurality of bendings at identical 146 places, volume turning.136 places form the sealing member 132 of the first bending with center c and radius r to sealing member 122 at the pouch edge.Sealing member also forms has different center c ' and radius r ' the sealing member 132 ' of the second bending.Crooked sealing member 132 and 132 ' both be recessed because their center c and c ' are in volume 144.

Fig. 9 B shows the partial front elevation view of an embodiment of pouch 100, and it comprises the sealing member 132,132 ' of a plurality of bendings at identical 146 places, volume turning.136 places form the sealing member 132 of the first bending with center c and radius r to sealing member 122 at the pouch edge.Sealing member also forms has different center c ' and radius r ' the sealing member 132 ' of the second bending.Between the sealing member 132 of the first bending and the sealing member 132 ' of the second bending is the sealing member 148 of protruding song, and it has center c " and radius r ".The sealing member 148De center c of protruding song " be arranged in sealing member 122.

In the embodiment of this paper, the present invention and supplementary technology known in the art are combined, such as laser beam cutting, hemisect, line, embossing etc. and known method therefor and machine.In the embodiment of this paper, will be again closure techniques and the present invention combined with permission closed pouch again easily and effectively after opening.This type of again closure techniques for larger sized pouch, be also especially useful.Typically closure techniques is known in the art again, and comprises the pressure-sensitive zip of plastics, hook-loop fastening system, zip system, strip of glue and paster, fixture and snap-on, fastening system etc.About the supplementary technology be used in combination with the present invention, see European patent 1 409 366B1 that authorized the people such as Camargo-Parodi on June 21st, 2006; With the european patent application of authorizing Rogers 07119454.2 that is filed on October 29th, 2007.

Example 1

According to the pouch of Fig. 1 and Fig. 2 on the VFFS machine, use with Fig. 6-7 similarly the sealing intermediate plate by thin slice, formed.Described VFFS machine by the heated sealant intermediate plate at the described hot adhesion that independently produces between thin slice, to produce whole sealing members.Thin slice be membrane material polyethylene terephthalate, metallic membrane (such as

) and poly three laminates layer by layer.On the roller of thin slice in feeding described VFFS machine, provide and be stretched on the zone that wherein forms pipe by sealing in the vertical the fin seal part.Pipe has leading edge, and described leading edge is used and sealed to form the leading edge sealing member according to the sealing intermediate plate of Fig. 6-7.(～1.7kg) granular laundry detergent is filled in pipe and it is deposited in pipe, and uses the sealing intermediate plate sealed tube of Fig. 6-7 with formation, to comprise the pillow formula pouch of the filling of granular laundry detergent by predetermined weight.Then for next pouch, repeat this process.

According to Fig. 3, on standard VFFS machine, utilize the sealing intermediate plate of standard group to form the comparison pouch with similar material.These relatively pouches in whole volume corners, all have the angle of 90 ° basically.

Test in the following manner the situation of breaking: each bag dropped 3 times three different sides from the height of 1.2m, then also they are packaged in to the height from 1.2m in Polywoven Bag and drop 3 times at 3 different faces.Also bag is dropped on another bag, keep turning to land and lying against on the face of ground another bag.Situation while also having observed when the bag Polywoven Bag from the belt heights free fall to the line end.

Counted the number that breaks of the volume corner of bag, and by it divided by total bag number, determining ratio of defects as follows:

Table 1

?	Example 1	Compare pouch A	Compare pouch B
				Ratio of defects in %	0.7%	1.9%	1.8%

Example 2

Also test pouch of the present invention and between Time of Shipment, reduced the ability of mass defect., in the mode with identical described in example 1, prepare the pillow formula pouch of Fig. 1-2 herein, and (～1.55kg) granular laundry detergent is filled with predetermined weight by it.To also with the granular laundry detergent of same amount, fill according to the comparison pouch of Fig. 3.Pouch manually is packaged in to the container for shipment in a mode on another top.After arriving destination, the counting film pierces through or the sealing number of loss, and it is multiplied by total bag of number to determine ratio of defects as follows:

Table 2

?	Example 1	Compare pouch A
			Ratio of defects in ppm	0	2137

With having the standard pouch at the volume turning of 90 ° of angles basically, compare, pouch of the present invention shows the mass defect of minimizing between Time of Shipment.

One skilled in the art will appreciate that the fine difference on the material between example and comparison pouch can not affect the result of these tests significantly.Considered the unexpected remarkable minimizing of breaking.

Dimension disclosed herein and value are not intended to be understood to strictly be limited to described exact value.On the contrary, except as otherwise noted, each such dimension is intended to mean described value and around the scope be equal on this value function.For example, disclosed dimension " 40mm " is intended to mean " about 40mm ".

The relevant portion of the document used of quoting in detailed Description Of The Invention is incorporated herein by reference; Quoting of any document all may not be interpreted as its approval as prior art of the present invention.When any implication of same term in any implication of term in the literature or definition and the document be incorporated to way of reference or define while conflicting, will be as the criterion with implication or the definition of giving that term in the literature.

Although with specific embodiment, illustrated and described the present invention, those be it will be apparent to those skilled in the art that in the situation that do not deviate from the spirit and scope of the present invention and can make many other change and modifications.Therefore, the claims of enclosing are intended to contain whole these changes and the modification in the scope of the invention.

Claims

1. A sachet comprising:

a. a sheet comprising at least one layer of membrane material, the sheet forming a tube; and

b. a seal that shapes the tube into a volume,

wherein the seal comprises a first edge, wherein the sheet comprises a second edge in connected relation to the first edge, and wherein a curved seal joins the first edge to the second edge.

2. The pouch of claim 1, wherein the curved seal forms a volume corner, and wherein the pouch comprises a plurality of volume corners.

3. The sachet of claim 1, wherein the sachet is formed by an automatic packaging machine.

4. The sachet of claim 1 containing therein a granular product.

5. The sachet of claim 1 containing a liquid product therein.

6. The pouch of claim 1, wherein the film material is about 15 μm to about 220 μm thick.

7. The sachet of claim 1, wherein the curved seal has a radius of curvature greater than about 3 mm, preferably from about 10 mm to about 30 mm.

8. The sachet of claim 1, wherein the volume is substantially airtight.

9. The sachet of claim 4, wherein the granular product is a granular laundry detergent.

10. A sealing clip comprising:

a. A sealing arm comprising a sealing area comprising:

i. the first edge forming element; and

ii. a curved seal-forming element adjoining said first edge-forming element; and

b. receiving arm,

wherein the sealing arm and the receiving arm are complementary, and wherein the sealing arm and the receiving arm are coactable to seal a wafer therebetween.

11. The sealing jaw of claim 10, wherein the sealing arm includes a heating element.

12. The sealing jaw of claim 10, wherein the receiving arm includes a heating element.

13. An automatic packaging machine comprising a sealing jaw according to claim 10.

14. A method for sealing a sachet comprising the steps of:

a. Provide flakes;

b. forming a tube having a leading edge from said sheet;

c. sealing said leading edge to form a leading edge seal;

d. filling the tube with a predetermined amount of product;

e. sealing the tube to form a trailing edge seal; and

f. cutting said tube after said trailing edge seal to form a pouch comprising a volume between said leading edge seal and said trailing edge seal, wherein said volume contains said product,

Wherein at least one of the first seal or the second seal comprises a first edge and a curved seal adjoining the first edge.