CN103662190A - Sealing container - Google Patents
Sealing container Download PDFInfo
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- CN103662190A CN103662190A CN201310393424.4A CN201310393424A CN103662190A CN 103662190 A CN103662190 A CN 103662190A CN 201310393424 A CN201310393424 A CN 201310393424A CN 103662190 A CN103662190 A CN 103662190A
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- China
- Prior art keywords
- barrier layer
- sealing
- junction surface
- airtight container
- heat
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
- B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
- B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3468—Batteries, accumulators or fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
Abstract
The invention provides a sealing container which can obtain a high barrier performance stably. A lamination packaging material (10a/10b) of a thermoplastic resin layer (14) is laminated on at least one surface of each of barrier layers (13) so as to overlap the thermoplastic resin layer (14) in a manner that the thermoplastic resin layer (14) is arranged in the inner side. The peripheries of the overlapped lamination packaging materials (10a, 10b) are jointed and thus sealed, thereby forming an accommodating part (16). A sealing part (31) of each of the peripheries comprises a heat-sealing part (33) deposited with the thermoplastic resin layer (14) and multiple barrier layer combining parts (34) which enable the barrier layers (13) to joint mutually. The multiple barrier layer combining parts (34) are arranged in the heat-sealing part (33) discontinuously in a spotted manner.
Description
The application is willing to No. 2012-189015 and advocates preceence based on the Japanese patent application laid that on August 29th, 2012 submits to, and its disclosure directly being formed to the application's a part.
Technical field
The present invention relates to use in airtight container and correlation technique thereof in the sealing bag (retort pouch) of housing and various food etc. for the batteries such as lithium rechargeable battery.
Background technology
For the packing of the above-mentioned article of not liking light, oxygen, moisture, used airtight container, sealing container uses thermoplastic resin is laminated to the laminate wrapping material on the metal barrier layer of blocking light, oxygen, moisture.As shown in Figures 1 and 2, above-mentioned airtight container 100 is normally placed in the thermoplastic resin of laminate wrapping material 10a, 10b 14 inner side and overlapping, and circumference is sealed and is manufactured.The periphery sealing 101 of the airtight container 100 of being manufactured by the method as shown in figure 11, is by making thermoplastic resin 14 deposited formation each other.
Above-mentioned airtight container 100 completely cuts off with outside light, oxygen, moisture by metal barrier layer 13.But, the sealing 101 of above-mentioned airtight container 100 is communicated with thermoplastic resin 14 from outer circumference end until interior week holds, thus, worry that micro-light, oxygen, the moisture of from the peripheral end face of sealing 101, invading can invade resettlement section 16 by thermoplastic resin 14.Even if their intrusion amount is micro-, once also can worry to invade to resettlement section 16, can produce variety of issue.For example, in the containers for food use such as sealing bag, once aerobic gas cut enters, content will degenerate.In addition, if packing battery acid as lithium rechargeable battery, once worry to have moisture to invade will to produce hydrofluoric acid and sealing property significantly reduces.
For the problems referred to above, patent documentation 1 has proposed a kind of method, that is, brute force press overlapping laminate wrapping material so that barrier layer one another along peripheral direction with wire near to or in contact with mode seal.According to sealing method, if make barrier layer closer to each other, the thermoplastic resin narrowing down can form narrow road, thereby makes light etc. be difficult to invade.In addition, if barrier layer contacts with each other, because thermoplastic resin interrupts at contact point, so can stop the intrusion (with reference to patent documentation 1) of light etc.
Patent documentation 1: TOHKEMY 2000-264313 communique
The method of recording by patent documentation 1 can make barrier improve.But, even if make barrier layer approach to form narrow road, also just make to invade sectional area and diminish, therefore cannot interdict light etc. completely.And, from the transmission meeting of the heat of hot sealing device, because outside air temperature etc. has deviation, be therefore difficult to make to invade sectional area stable, and then barrier property also can be unstable.In addition, for barrier layer is contacted with each other, can push resin, but only in single shaft direction, push resin when wire contacts, so the flowing power of resin is very poor.Thus, in order positively to push resin, barrier layer is engaged with each other, need to imposes severe pressure.In addition, if the quantity not sufficient of pushing and remain resin on joint interface can form the path of invading from outside.If there is non-bonding part in a part for wire contact part, light etc. can from wherein by and with shortest distance, invade to inner, so barrier property can become unstable.
Summary of the invention
The present invention is in view of above-mentioned technical background, take that a kind of airtight container and correlation technique thereof that can stably obtain high obstructing performance is provided is object.
That is, the present invention has the structure that following [1]～[12] are recorded.
[1] airtight container, at the folded laminate wrapping material that has thermoplastic resin at least one side upper strata of barrier layer, overlapping in the mode inside thermoplastic base resin is placed on, the periphery of overlapping laminate wrapping material is engaged and sealed, form thus resettlement section, it is characterized in that
The sealing of described periphery has a plurality of barrier layers junction surface that is deposited with the heat-sealing portion of thermoplastic resin and barrier layer is engaged with each other, described a plurality of barrier layers junction surface in heat-sealing portion discontinuously with mottled configuration.
[2] according to the airtight container described in preceding paragraph 1, it is characterized in that, described barrier layer consists of metal.
[3] according to the airtight container described in preceding paragraph 1 or 2, it is characterized in that, on the arbitrary line of the periphery quadrature with described sealing, have at least one barrier layer junction surface.
[4] according to the airtight container described in any one in preceding paragraph 1～3, it is characterized in that, is on the arbitrary line of 45 ° of less thaies in the angle that straight line is with being orthogonal to the periphery of described sealing, has at least one barrier layer junction surface.
[5] according to the airtight container described in any one in preceding paragraph 1～4, it is characterized in that, the aspect at described barrier layer junction surface is rhombus.
[6] according to the airtight container described in preceding paragraph 5, it is characterized in that, the aspect at described barrier layer junction surface is the different rhombus of catercorner length, this barrier layer junction surface so that longer diagonal line along the mode of the peripheral direction of sealing, configure.
[7] according to the airtight container described in any one in preceding paragraph 1～6, it is characterized in that, on the Width of described sealing, dispose multiple row barrier layer junction surface.
[8] according to the airtight container described in any one in preceding paragraph 1～7, it is characterized in that having in the region, inner circumferential side of described sealing: there is no barrier layer junction surface and the region that only formed by heat-sealing portion.
[9] according to the airtight container described in any one in preceding paragraph 1～8, it is characterized in that, described airtight container is battery housing.
[10] battery, is characterized in that, the battery that battery main body is seated in described in preceding paragraph 9 is used in housing, at the electrode being connected with described battery main body, with lead-in wire, is drawn out under the state outside housing, on the periphery of this housing, is formed with sealing.
[11] manufacture method for airtight container, is characterized in that, carries out following operation:
By the folded laminate wrapping material that has thermoplastic resin at least one side upper strata of the barrier layer being formed by metal, so that thermoplastic resin becomes the overlapping operation of mode of inner side;
By clipped the periphery of overlapping laminate wrapping material by pressing plate, heat, and make thermoplastic resin each other deposited heat-sealing portion form operation; With
On the periphery of overlapping laminate wrapping material, press from the teeth outwards discontinuously with the mottled fixture with projection that is provided with a plurality of projections on one side, grant ultrasonic vibration on one side, by the front end face of described projection, push thermoplastic resin so that barrier layer exposes, the barrier layer junction surface again exposed barrier layer being engaged with each other forms operation
On the periphery of overlapping laminate wrapping material, be formed in heat-sealing portion discontinuously with the mottled sealing that disposes a plurality of barrier layers junction surface.
[12] according to the manufacture method of the airtight container described in preceding paragraph 11, it is characterized in that, after described heat-sealing portion forms operation, at thermoplastic resin, during soft state, carry out barrier layer junction surface and form operation having carried out.
Invention effect
According to the leakproof tank above-mentioned [1] Suo Shu, owing to wanting to invade to deteriorated promotion things such as the light in container, water, oxygen and be blocked a layer junction surface blocking from the end face of sealing, so roundabout and only advance heat-sealing portion from barrier layer junction surface.This intrusion path is the narrow road forming between adjacent barrier layer junction surface, and sectional area diminishes, and therefore the intrusion of deteriorated promotion thing is suppressed.Further, by forming alternate path, to make to invade the distance of path elongated, and the intrusion of deteriorated promotion thing is suppressed thus.
In addition, above-mentioned barrier layer junction surface is discontinuously with mottled formation in heat-sealing portion, and thus, the whole of barrier layer junction surface is around all heat-sealing portion, is all thermoplastic base resin.Therefore, for barrier layer is engaged with each other, and when pushing thermoplastic base resin barrier layer being exposed, resin can be pushed to all directions of the surrounding of barrier layer junction surface (reservations), thus, resin can flow well and easily make barrier layer expose.Thus, with exerting pressure seldom, just can positively form barrier layer junction surface, and then can obtain stable barrier property.
In addition, with resin each other the deposited heat-sealing portion forming compare, make in situation that the binding force at barrier layer junction surface becomes stronger, sealing makes peel resistant strength improve with respect to the stress from outside.
According to the airtight container above-mentioned [2] Suo Shu, because the barrier layer of laminate wrapping material is metal, so barrier property and intensity are very high.
According to the airtight container above-mentioned [3] Suo Shu, owing to there not being the intrusion path that crosses sealing with shortest distance, so can positively extend the distance of invading path.
According to the airtight container above-mentioned [4] Suo Shu, with respect to the straight line of the periphery quadrature with sealing, the angle of inclination of the intrusion path of straight line is more than 45 °.Above-mentioned angle of inclination becomes larger, and the distance of invading path can become longer, thereby obtains the intrusion inhibition with the corresponding deteriorated promotion thing in above-mentioned angle of inclination.
According to the airtight container above-mentioned [5] Suo Shu, can manufacture the fixture with projection that is used to form barrier layer junction surface by line cutting processing, therefore can be with low cost fabrication fixture.
According to the airtight container above-mentioned [6] Suo Shu, with respect to the straight line of the periphery quadrature with sealing, the angle of inclination of the intrusion path of straight line is over 45 °.Above-mentioned angle of inclination becomes larger, and the distance of invading path can become longer, thereby obtains the intrusion inhibition with the corresponding deteriorated promotion thing in above-mentioned angle of inclination.
According to the airtight container above-mentioned [7] Suo Shu, owing to invading the roundabout number of times of path, according to columns, increase, so can make the distance of invading path become longer.
According to the airtight container above-mentioned [8] Suo Shu, because the region, inner circumferential side of sealing does not exist barrier layer junction surface and only consists of heat-sealing portion, so content only contacts with thermoplastic resin.Sealing container avoids the packing of the content that contacts with barrier layer also can use safely for needs.
According to the airtight container above-mentioned [9] Suo Shu, at battery with obtaining above-mentioned effect in housing.
According to the battery above-mentioned [10] Suo Shu, with respect to deteriorated promotion thing, barrier property is very high, and can obtain stable barrier property.
According to the manufacture method of the airtight container above-mentioned [11] Suo Shu, can manufacture the stable airtight container of barrier property with the laminate wrapping material that barrier layer is metal.
According to the manufacture method of the airtight container above-mentioned [12] Suo Shu, because heat-sealing portion by first carrying out forms operation, can flatten thermoplastic resin and make its attenuation, even so by after the barrier layer junction surface of the carrying out super sonic that forms operation engage the amount of resin of pushing and tail off also passable, therefore, barrier layer joint each other becomes easy.And by carry out super sonic joint during soft state at resin, pushing of resin can be easy to, so the formation at barrier layer junction surface is also easy to, and can carry out efficiently encapsulation process.
Accompanying drawing explanation
Fig. 1 means the battery of an embodiment of the leakproof tank of the present invention block diagram of the state before the encapsulation process of housing.
Fig. 2 is that the battery of Fig. 1 is used the cutaway view of circumference with the sealing of housing.
Fig. 3 is used the block diagram of the battery of housing for the battery of Fig. 1.
Fig. 4 A is the birds-eye view of the sealing of housing for battery.
Fig. 4 B is the cutaway view of the sealing of housing for battery.
Fig. 5 is other embodiments of the sealing on leakproof tank.
Fig. 6 is the another embodiment of the sealing on leakproof tank.
Fig. 7 is the another embodiment of the sealing on leakproof tank.
Fig. 8 is the another embodiment of the sealing on leakproof tank.
Fig. 9 is the another embodiment of the sealing on leakproof tank.
Figure 10 is in the manufacture method of leakproof tank of the present invention, represents the cutaway view of encapsulation process operation.
Figure 11 is the cutaway view of the periphery sealing of existing airtight container.
Description of reference numerals
1-is housing (airtight container) for battery
2-battery
10a, 10b-housing halfbody (laminate wrapping material)
11-recess
12-sealing circumference
13-barrier layer
14-thermoplastic resin
15-outside layer
16-resettlement section
20-is anodal with lead-in wire
Lead-in wire for 21-negative pole
30-periphery sealing
31-the first sealing (sealing)
33,41,46,51,56,61-heat-sealing portion
34,47,52,57,62-barrier layer junction surface
Region, 36-inner circumferential side
40,45,50,55,60-sealing
The diagonal line that 63-is longer
70,71-heat-sealing pressing plate
72-projection
73-is with the fixture of projection
The specific embodiment
[summary of airtight container]
In Fig. 1 and Fig. 2, represent the state before the encapsulation process of housing 1 for battery form based on laminate wrapping material, in Fig. 3, represent above-mentioned battery to carry out encapsulation process with housing 1 and the battery 2 manufactured.The battery of having implemented encapsulation process is an embodiment of leakproof tank of the present invention with housing 1.In addition, in the following description, comprise from the outside of airtight container and invade and make the deteriorated light of content, oxygen, moisture etc., be called " deteriorated promotion thing ".
Battery is to be formed with sealing with two housing halfbody 10a, 10b of circumference 12 so that the relative mode of the peristome of recess 11 configures with housing 1, and overlapping sealing is engaged with circumference 12, form thus the parts of resettlement section 16, sealing is extended to the outside of general horizontal direction from the opening periphery of overlooking as tetragonal recess 11 with circumference 12.As shown in Figure 2, above-mentioned housing halfbody 10a, 10b are formed with the parts of recess 11 to laminate wrapping material enforcement stretch process, this laminate wrapping material is laminated with thermoplastic resin 14 in the one side of barrier layer 13, and on another side, be laminated with outside layer 15, housing halfbody 10a, the 10b after assembling makes thermoplastic resin 14 contact with each other in sealing circumference 12.
[laminate wrapping material]
In above-mentioned laminate wrapping material 10a, 10b, the preferred material of each layer is as follows.
The material of barrier layer 13 is so long as can interdict the material of deteriorated promotion thing, and indefinite.As the preferred material of barrier layer 13, high this point of, bond strength high with barrier, can recommend the metals such as aluminium, copper, iron.Further, can by using these metals as barrier material, in encapsulation process described later, be suitable for super sonic engages.
Become the material of thermoplastic resin 14 of airtight container inside face so long as can enough thermoplastic base resins carry out deposited material, can use any materials, especially preferred CPP (un-stretched polypropylene) and polyethylene.These thermoplastic base resins are easily softening, are therefore suitable for pushing the encapsulation process that resin is engaged with each other barrier layer 13.
The material of outside layer 15 is preferably fusing point and compares higher resin with thermoplastic resin 14, can recommend polyethylene terephthalate and polyamide.
Necessary condition applicable to the laminate wrapping material in airtight container of the present invention is, the face that regards to container inside is thermoplastic resin, and compare and in outside, there is barrier layer 13 with this thermoplastic resin 14, so long as meet the material of this condition, also can be applicable to the packing of other stepped construction.Although having or not of the outside layer 15 of illustrated example is also arbitrarily, in order to protect barrier layer 13, preferably use the laminate wrapping material with outside layer 15.In addition, in encapsulation process described later, if there is outside layer 15, the damage of the barrier layer 13 in the situation that also can avoid clipping to pressurize with fixture for sealing.In addition, can be also between barrier layer 13 and thermoplastic resin 14 or outside layer 15, to there is the stepped construction of interlayer.
Although forming the thickness of each layer of above-mentioned laminate wrapping material 10a, 10b is not defined yet, but due to the encapsulation process of pushing in the present invention the resin of thermoplastic resin 14 barrier layer 13 being engaged with each other, as long as so can guarantee bond strength, thermoplastic resin 14 is preferably thinner.From this viewpoint, the thickness of thermoplastic resin 14 is 10～100 μ m, is especially preferably 20～40 μ m.In addition, the thickness of above-mentioned barrier layer 13 is preferably the more than 1/3 of thickness of thermoplastic resin 14.In encapsulation process, with fixture, clip laminate wrapping material 10a, 10b and push resin, therefore, in this operation, in order not make barrier layer 13 fractures, be also preferably the thickness of above-mentioned scope.The thickness of especially preferred outside layer 15 is
10～80μm。
[using the battery of airtight container]
As shown in Figure 3, state in the use in the manufacture of battery with the battery 2 of housing 1, in the recess 11 of a side housing halfbody 10b, accommodate battery main body, and the positive pole being connected with negative pole with the positive pole of battery main body is respectively drawn out to outside with lead-in wire 20 and negative pole with lead-in wire 21, under this state, cover the opposing party's housing halfbody 10a and by the overlapping encapsulation process of carrying out of circumference 12 for sealing.Above-mentioned positive pole is configured in sealing with lead-in wire 21 with lead-in wire 20 and negative pole and uses between circumference 12,12 under the state being clamped by tab film (tab film) 22,23 respectively.Therefore, if seal the encapsulation process with circumference 12,12, be formed on the first sealing 31 in lead-in wire 20,21 not derivative parts, directly engage and have upper and lower circumference 12,12 sealing for, and be formed on the second sealing 32 in lead-in wire 20,21 parts of drawing via lead-in wire 20,21 and lead-in wire film 22,23 and joint has upper and lower circumference 12,12 for sealing.Above-mentioned battery is formed with by two the first sealings 31 and two periphery sealings 30 that the second sealing 32 forms on all-round with housing 1, and at lead-in wire 20, the 21 state lower seals that are drawn out to outside housing.
[sealing of airtight container]
On above-mentioned periphery sealing 30, the first sealing 31 being formed in lead-in wire 20,21 not derivative parts is corresponding with sealing of the present invention, and it consists of heat-sealing portion and barrier layer junction surface.
As shown in Fig. 4 A and Fig. 4 B, the first sealing 31 forms by the deposited heat-sealing portion 33 forming by thermoplastic resin 14,14 and the resin of pushing thermoplastic resin 14 a plurality of barrier layers junction surface 34 that barrier layer 13,13 is engaged with each other.Above-mentioned heat-sealing portion 33 is formed in the whole region of Width of the first sealing 31, with respect to this, barrier layer junction surface 34 is only formed in the zone line 35 on Width, does not have barrier layer junction surface 34, and only have heat-sealing portion 33 in region, inner circumferential side 36 and outer circumferential side region 37.
Above-mentioned heat-sealing portion 33 is uninterrupted in the whole region of the first sealing 31, but continuous, with respect to this, a plurality of barrier layers junction surface 34 is mutually discontinuous, and with mottled, exists in heat-sealing portion 33.In addition, each barrier layer junction surface 34 be shaped as two cornerwise rhombuses equal in length (square), two diagonal lines are along the peripheral direction of the first sealing 31 and Width and configure.In addition, these barrier layer junction surfaces 34 are configured to multiple row on the Width of sealing 30, and with respect to peripheral direction and this both direction of Width with zig-zag arranged askew with staggered configuration.The closeest configuration that is configured to rhombus at this barrier layer junction surface 34, the heat-sealing portion 33 in zone line 35 forms oblique grille-like by the closeest configuration at barrier layer junction surface 34.
The deteriorated promotion thing coming from container external belt is interdicted completely by barrier layer 13, but likely have trace, enters into thermoplastic resin 14.Therefore, in the overlooking of the first sealing 31 shown in Fig. 4 A, the deteriorated promotion thing entering from peripheral end face only arrives in containers along heat-sealing portion 33, and heat-sealing portion 33 becomes intrusion path.Above-mentioned heat-sealing portion 33 is blocked layer junction surface 34 and clips and form narrow road, and the sectional area of invading path diminishes, and the intrusion of deteriorated promotion thing is inhibited thus.In addition, because above-mentioned heat-sealing portion 33 is connected to the zone line 35 of inner side in the outer circumference end from the first sealing 31, be oblique grille-like, so the intrusion path 38,39 of deteriorated promotion thing can become and roundaboutly avoids the jagged route 38 at barrier layer junction surface 34 or become angled straight lines 39.The intrusion path 39 of jagged intrusion path 38 and angled straight lines is compared distance with route S longer, this route S is the route by the represented shortest distance of the straight line of the periphery quadrature with the first sealing 31, and the distance of invading path by prolongation suppresses the intrusion of deteriorated promotion thing.As mentioned above, the first sealing 31 of present embodiment is by dwindling the sectional area of the intrusion path of deteriorated promotion thing, and prolongation intrusion path, and synthetically suppresses to invade, and improves barrier.
In addition, barrier layer junction surface 34 with make resin each other the deposited heat-sealing portion 33 forming to compare binding force stronger.Thus, by form barrier layer junction surface 34 in heat-sealing portion 33, with respect to the stress from outside, improve peel resistant strength.
Because sealing 31 of the present invention has a plurality of barrier layers junction surface 34 with mottled in heat-sealing portion 33, so the width of heat-sealing portion 33 becomes in fact the width W 1 (with reference to Fig. 4 A) of sealing 31.The present invention does not limit the width W 1 of sealing 31, but guarantees bond strength for the interior pressure with respect to container, is preferably formed width W 1 for sealing 31 more than 1mm.In addition, if width W 1 is 10mm, can access sufficient bond strength.Therefore, the width W 1 of preferred sealing 31 is 1～20mm.In addition, the preferred value of the width W 1 of above-mentioned sealing 31 also can be subject to the impact of the thickness of thermoplastic resin 14 and the MFR value of resin, therefore, according to these situations, is preferably, and is suitably set in the scope of 1～20mm.The width W 1 of especially preferred sealing 31 is 3～10mm.
In addition, because the end, inner circumferential side of sealing 31 can contact meaningful thing, so its material being only preferably by thermoplastic resin 14 forms.Some content must be avoided or preferably avoid for example, contacting with the material (metal) of barrier layer 13.For example,, if battery just must avoid battery acid to contact with metal barrier layer 13.Thus, preferably, in the region, inner circumferential side 36 of sealing 31, barrier layer junction surface 34 is not set, and forms the region only have heat-sealing portion 33, said structure also can be used safely at needs and avoid in the packing of the content that contacts with barrier layer.The width W 2 in region, above-mentioned inner circumferential side 36 is preferably 3～15mm, is especially preferably 5～10mm.On the other hand, do not limit in the outer circumferential side region 37 of sealing 31 and have or not barrier layer junction surface 34.
As illustrated according to above-mentioned embodiment, on sealing 31, by dwindling the sectional area of the intrusion path of deteriorated promotion thing, or further make to invade the roundabout distance that extends of path, can suppress to invade the intrusion of deteriorated promotion thing.
Dwindling so long as dwindle the width of invading path of the sectional area of above-mentioned intrusion path, invade path width dwindle so long as in heat-sealing portion 33 a plurality of barrier layers of discontinuous formation junction surface 34, just can with the shape at barrier layer junction surface 34 and formation location-independent realize.The width of invading path is the interval D between barrier layer junction surface 34, therefore, can suppress the intrusion (with reference to Fig. 4 A) of deteriorated promotion thing by constriction interval D.On the other hand, for so that the amount that the interval D between barrier layer junction surface 34 is dwindled is pushed resin, can cause need to larger pressure etc. processing conditions become strict, and, in the situation that resin is not pushed, cannot make barrier layer 13 contact with each other, thereby cannot form barrier layer junction surface 34.From this viewpoint, be preferably, the interval D between barrier layer junction surface 34 is set in the scope of 0.2～3mm, is especially preferably 0.5～1.5mm.
In addition, about the size at each barrier layer junction surface 34, preferably its external circle diameter is 0.2～5mm, is especially preferably 0.5～1.5mm.
The shape of the expansion of distance of in addition, invading path by barrier layer junction surface 34 or form position or their combination and can realizing.As shown in Figure 4 A, the shortest intrusion path is positioned on the straight line S with the periphery quadrature of sealing 31, the shortest distance of take is crossed the size of the width W 1 that the distance in the situation of this first sealing 31 is sealing 31, therefore, as long as there is at least one barrier layer junction surface 34 on above-mentioned straight line S, so just can pass through the roundabout distance of invading path that extends in this barrier layer junction surface 34.Therefore, as long as so that exist the mode at least one barrier layer junction surface 34 to configure barrier layer junction surface 34 on the arbitrary line S of the periphery quadrature with sealing 31, the intrusion path of above-mentioned shortest distance will become and not exist, and intrusion path is compared with the width W 1 of sealing 31 will be elongated.In addition, as shown in Figure 4 A, if form multiple row barrier layer junction surface 34 on the Width of sealing 31, roundabout number of times will increase, and therefore can make the distance of invading path become longer.But if at the interior increase columns of limited width W 1, the interval between barrier layer junction surface 34 also can narrow down, flowing of the resin of pushing is easily retarded by silt, and thus, columns is preferably below 20 row.
The sealing 40 of Fig. 5, in heat-sealing portion 41, makes the barrier layer junction surface 34 identical shaped with Fig. 4 A not with staggered and in column configuration.In the situation of this configuration in column, the straight line 42 passing through between the barrier layer junction surface 34 adjacent along peripheral direction is, the intrusion path of shortest distance, this straight line is the route S by the represented shortest distance of the straight line of the periphery quadrature with sealing 40, therefore, cannot extend the distance of invading path.In addition, because above-mentioned sealing 40 is discontinuous, be formed with a plurality of barrier layers junction surface 34, have by dwindling the sectional area of intrusion path and suppress the effect of the intrusion of deteriorated promotion thing, so comprise in the present invention.[other shape examples and the configuration example at barrier layer junction surface]
Sealing the 45,50,55, the 60th shown in Fig. 6～Fig. 9, other embodiments of sealing of the present invention.
(1) Fig. 6
Sealing 45 is in heat-sealing portion 46, a plurality of barrier layers junction surface 47 of parallelogram is configured to the example of row in the Width of sealing 45.Even if be configured to row, according to the setting value at the interval between the barrier layer junction surface 47 adjacent with the interior angle of parallelogram, also can make upper at least one the barrier layer junction surface 47 that exists of arbitrary line S with the periphery quadrature of sealing 45.In figure, 48 is the shortest intrusion path.
(2) Fig. 7
(3) Fig. 8
(4) Fig. 9
Make rhombus the intrusion path 64 of the straight line in the sealing 60 of close configuration tilt angle alpha, by the route S of the represented shortest distance of the straight line of the periphery quadrature with sealing portion 60 and the angle that intrusion path 64 is of straight line be this rhombus interior angle 1/2.Above-mentioned interior angle is in two pairs of interior angles, be positioned at a pair of interior angle on the straight line S with the periphery quadrature of sealing 60.Therefore, above-mentioned interior angle 2 α become larger, and the tilt angle alpha of invading path 64 just becomes larger, and distance just becomes longer, and the intrusion inhibition of deteriorated promotion thing just becomes larger.Above-mentioned interior angle 2 α determine by two cornerwise length, longer diagonal line 63 in two diagonal lines of rhombus is along peripheral direction, and the difference of cornerwise length becomes larger, the distance of invading path 64 becomes longer, thereby obtains and the corresponding inhibition of invading of distance.
Because interior angle 2 α of the rhombus shown in Fig. 9 are obtuse angles, so the tilt angle alpha of invading path 64 is over 45 °.Therefore, make rhombus in the sealing of close configuration, if by rhombus so that longer diagonal line configures along the mode of peripheral direction, the tilt angle alpha of the intrusion path 64 of straight line is over 45 °.On the other hand, because the barrier layer junction surface 34 of the sealing 31 of Fig. 4 A is two cornerwise rhombuses equal in length (square), so invade the tilt angle alpha of path, it is 45 °.In other words, in the angle that straight line is with being orthogonal to the periphery of above-mentioned sealing 31, be on the arbitrary line of 45 ° of less thaies, there is at least one barrier layer junction surface 34, there is not the intrusion path of the straight line of 45 ° of tilt angle alpha less thaies.
As mentioned above, in the situation that make the closeest configuration in barrier layer junction surface of rhombus, be preferably and give difference to two cornerwise length, by longer diagonal configuration in the direction along peripheral direction, cornerwise length difference becomes larger, and the intrusion inhibition of deteriorated promotion thing becomes larger.In addition, the preferred size of rhombus is, long-diagonal is of a size of 0.05～20mm, and short diagonal is of a size of 0.02～10mm, and especially preferred size is, long-diagonal is of a size of 0.5～3mm, and short diagonal is of a size of 0.2～1.2mm.
In addition, the distance of the intrusion path of straight line is along with the angle of inclination of the intrusion path of the straight line of the periphery quadrature with respect to sealing becomes larger and becomes longer, this situation is not limited to the situation that above-mentioned barrier layer junction surface is rhombus, is all common in any shape.Therefore, if with the angle that straight line is that is orthogonal to the periphery of sealing be on the arbitrary line of 45 ° of less thaies, there is at least one barrier layer junction surface, there is not the intrusion path of the straight line of 45 ° of angle of inclination less thaies, the angle of inclination of the intrusion path of straight line become at 45 ° more than, obtain the intrusion inhibition with the corresponding deteriorated promotion thing of above-mentioned angle.
[purposes of airtight container]
Airtight container of the present invention can not liked the packing container of article of light, oxygen, moisture and widespread use as battery, food etc.In addition, all it doesn't matter for the size of the shape of airtight container (recess be shaped have or not), airtight container, the having or not of the shaping of the laminate wrapping material of sheet.But since need to implement encapsulation process to the periphery of container, being preferably applicable to planar dimension is that 10mm * 20mm is above, thickness is container more than 3mm.In addition, being also applicable to planar dimension is that 300mm * 300mm is following, thickness is the container below 50mm.
In addition, the condition of airtight container of the present invention is, in at least a portion of periphery, be formed with the sealing (being designated hereinafter simply as " sealing of the present invention ") that is formed with a plurality of barrier layers junction surface in discontinuous mode, the container that is not formed with sealing of the present invention in a part for periphery is also contained in the present invention.For example, with reference to Fig. 3, in the situation that being applicable to battery and using housing, electrode is drawn out to outside container with lead-in wire, thus at electrode with not forming sealing of the present invention on the lead division going between, but form on the periphery except lead division.In addition, the content of tubular container is not how, although the periphery having at container leaves content filling peristome, and in the situation of carrying out encapsulation process and filling rear enclosed peristome, the container that leaves peristome to fill with is also contained in the present invention.
[manufacture method of airtight container]
Below, the encapsulation process of enumerating the sealing 31 of Fig. 4 A and Fig. 4 B is example, illustrates the manufacture method of the airtight container in the situation that the barrier layer of laminate wrapping material is metal with reference to Figure 10.
Because heat-sealing portion 33 is thermoplastic resin 14 joints each other, so can clip overlapping sealing by the pressing plate 70,71 of heat-sealing use, with circumference 12, heat, form thus (heat-sealing portion forms operation).On one side pressing accordingly with the shape at barrier layer junction surface 34 and configuration the fixture 73 with projection that is formed with a plurality of projections 72 pressurizes, grant ultrasonic vibration on one side, by the front end face of projection 72, push resin and barrier layer 13 is exposed on joint interface, and exposed barrier layer 13 is engaged with each other, thus, form barrier layer junction surface 34 (barrier layer junction surface forms operation).By projection 72 press and ultrasonic vibration and the resin flows of being pushed to being present in the whole recess 74 around of projection 72, easily make thus barrier layer 13 expose.Therefore, with less exerting pressure, just can positively form barrier layer junction surface 34, and then can obtain stable barrier property.
If above-mentioned encapsulating method is described from airtight container side, due to above-mentioned barrier layer junction surface 34 in heat-sealing portion 33 discontinuously with mottled formation, so the whole of barrier layer junction surface 34 is around all heat-sealing portion 33, be all thermoplastic base resin.Therefore, for barrier layer 13 is engaged with each other, when pushing thermoplastic base resin barrier layer 13 is exposed, resin can be pushed to all directions of the surrounding of barrier layer junction surface 34 (reservations), thus, resin can flow well, and easily makes barrier layer expose.
By carrying out above-mentioned heat-sealing portion's formation operation and barrier layer junction surface, form operation, can on the periphery of laminate wrapping material, form sealing 31 of the present invention.These operations can be carried out simultaneously, also can carry out successively.
In the situation that carrying out two operations by an operation, as shown in figure 10, the fixture 73 of mounting strap projection on pressing plate 71, heats pressurization Yi Bian clip sealing with circumference 12, Yi Bian the fixture 73 with projection is granted to ultrasonic vibration simultaneously.
In the situation that carrying out two operations successively, first only with pressing plate 70,71, form heat-sealing portion 33 (heat-sealing portion forms operation), the fixture 73 re-using afterwards with projection forms barrier layer junction surface 34 (barrier layer junction surface forms operation).If be divided into two operations and carry out the words of encapsulation process, because heat-sealing portion by first carrying out forms operation, can flatten thermoplastic resin 14 and make its attenuation, so by after the barrier layer junction surface of the carrying out super sonic that forms operation to engage the amount of resin of pushing seldom also passable, thus, barrier layer 13 joint each other becomes easy.In addition, barrier layer junction surface forms operation and is preferably, and after having carried out heat-sealing portion formation operation, when resin temperature also reduces, does not carry out continuously.If very high and resin carries out super sonic joint during soft state at resin temperature, pushing of resin can be easy to, so the formation at barrier layer junction surface 34 is also easy to.Also can soften resin by ultrasonic vibration, but heat while sealing by utilization can form more efficiently barrier layer junction surface 34, and then carry out more efficiently encapsulation process.
Above-mentioned heat-sealing and super sonic engage does not have restriction with good conditionsi, can suitably set according to the purposes of the material of the thermoplastic resin of laminate wrapping material and barrier layer and thickness, airtight container etc.
For example, the temperature about heat-sealing, if thermoplastic resin 14 is LLDPE (straight chain shape Low Density Polyethylene), is preferably more than 140 ℃, if CPP (un-stretched polypropylene) is preferably more than 160 ℃.In addition, if having the laminate wrapping material of the outside layer 15 consisting of resin, condition is that temperature is compared low with the fusing point of resin.If form the resin PET of above-mentioned outside layer, be preferably below 250 ℃, if nylon is preferably below 230 ℃.In addition, exerting pressure during heat-sealing is preferably 0.2～1.0MPa, and time of heat is preferably 2～5 seconds.
In addition, the condition engaging as super sonic, is preferably, and frequency is 15～40kHz, to exert pressure be that 5～20MPa, energy are that 0.5～100J, ultrasonic irradiation time are 0.1～2 second.
At super sonic, engage in the fixture 73 with projection of use the shape at the front end face shape of projection 72 and configuration and the barrier layer junction surface 34 of sealing 31 and configure corresponding.The manufacture method of the above-mentioned fixture with projection does not limit, and can use the fixture with projection with any means manufacture according to shape.For example, can be by the line cutting processing excision part corresponding with heat-sealing portion 33,61,46 between adjacent barrier layer junction surface 34,62,47, manufacture thus for by the barrier layer junction surface of the rhombus of Fig. 4 A, Fig. 9 34,62 the closeest configuration the fixture with projection and for making the fixture with projection of barrier layer junction surface 47 configurations in column of the parallelogram of Fig. 6.Can be defined as the shape that does not have barrier layer junction surface on cutting line with the fixture of line cutting processing manufacture, but be easily owing to being processed into desired shape, so have advantages of can be with low cost fabrication.
In addition, with reference to Fig. 4 A, Fig. 9, Fig. 6, although based on can be with the sealing forming with the fixture of projection 31,60,45 of line cutting processing manufacture, the intrusion path 39,64,48 with straight line, but by increasing their tilt angle alpha so that invade the elongated mode of distance of path 39,64,48, can increase the intrusion inhibition of deteriorated promotion thing.For example, in the closeest configuration at rhombus barrier layer junction surface, make diagonal line longer in two diagonal lines along peripheral direction, and along with more increasing the poor of cornerwise length, make tilt angle alpha become larger.
The present invention can be applicable with the sealing bag of housing and food etc. as lithium rechargeable battery.
Claims (12)
1. an airtight container, on at least one side upper strata of barrier layer, fold and have the laminate wrapping material of thermoplastic resin overlapping in the mode inside thermoplastic base resin is placed on, the periphery of overlapping laminate wrapping material is engaged and sealed, form thus resettlement section, it is characterized in that
The sealing of described periphery has a plurality of barrier layers junction surface that is deposited with the heat-sealing portion of thermoplastic resin and barrier layer is engaged with each other, described a plurality of barrier layers junction surface in heat-sealing portion discontinuously with mottled configuration.
2. airtight container according to claim 1, is characterized in that, described barrier layer consists of metal.
3. airtight container according to claim 1, is characterized in that, has at least one barrier layer junction surface on the arbitrary line of the periphery quadrature with described sealing.
4. airtight container according to claim 1, is characterized in that, in the angle that straight line is with being orthogonal to the periphery of described sealing, is on the arbitrary line of 45 ° of less thaies, has at least one barrier layer junction surface.
5. airtight container according to claim 1, is characterized in that, the aspect at described barrier layer junction surface is rhombus.
6. airtight container according to claim 5, is characterized in that, the aspect at described barrier layer junction surface is the different rhombus of catercorner length, this barrier layer junction surface so that longer diagonal line along the mode of the peripheral direction of sealing, configure.
7. airtight container according to claim 1, is characterized in that, disposes multiple row barrier layer junction surface on the Width of described sealing.
8. airtight container according to claim 1, is characterized in that, in the region, inner circumferential side of described sealing, has: there is no barrier layer junction surface and the region that only consists of heat-sealing portion.
9. according to the airtight container described in any one in claim 1～8, it is characterized in that, described airtight container is battery housing.
10. a battery, is characterized in that, battery main body is seated in battery claimed in claim 9 with in housing, at the electrode being connected with described battery main body, with lead-in wire, is drawn out under the state outside housing, on the periphery of this housing, is formed with sealing.
The manufacture method of 11. 1 kinds of airtight containers, is characterized in that, carries out following operation:
By the folded laminate wrapping material that has thermoplastic resin at least one side upper strata of the barrier layer being formed by metal, so that thermoplastic resin becomes the overlapping operation of mode of inner side;
By clipped the periphery of overlapping laminate wrapping material by pressing plate, heat, and make thermoplastic resin each other deposited heat-sealing portion form operation; With
On the periphery of overlapping laminate wrapping material, press from the teeth outwards discontinuously with the mottled fixture with projection that is provided with a plurality of projections on one side, grant ultrasonic vibration on one side, by the front end face of described projection, push thermoplastic resin so that barrier layer exposes, the barrier layer junction surface again exposed barrier layer being engaged with each other forms operation
On the periphery of overlapping laminate wrapping material, be formed in heat-sealing portion discontinuously with the mottled sealing that disposes a plurality of barrier layers junction surface.
The manufacture method of 12. airtight containers according to claim 11, is characterized in that, after described heat-sealing portion forms operation, carries out barrier layer junction surface form operation at thermoplastic resin during soft state having carried out.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-189015 | 2012-08-29 | ||
| JP2012189015A JP5985930B2 (en) | 2012-08-29 | 2012-08-29 | Sealed container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103662190A true CN103662190A (en) | 2014-03-26 |
| CN103662190B CN103662190B (en) | 2016-11-23 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310393424.4A Active CN103662190B (en) | 2012-08-29 | 2013-08-28 | Seal container |
| CN201320538058.2U Expired - Fee Related CN203544483U (en) | 2012-08-29 | 2013-08-28 | Sealed container |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320538058.2U Expired - Fee Related CN203544483U (en) | 2012-08-29 | 2013-08-28 | Sealed container |
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| Country | Link |
|---|---|
| JP (1) | JP5985930B2 (en) |
| KR (1) | KR102051683B1 (en) |
| CN (2) | CN103662190B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112272890A (en) * | 2018-05-28 | 2021-01-26 | 大日本印刷株式会社 | Battery, heat sealing device and manufacturing method of battery |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5985930B2 (en) * | 2012-08-29 | 2016-09-06 | 昭和電工パッケージング株式会社 | Sealed container |
| JP6558810B2 (en) * | 2017-10-16 | 2019-08-14 | セイコーインスツル株式会社 | Electrochemical cell and method for producing electrochemical cell |
| DE102019104379A1 (en) | 2019-02-21 | 2020-08-27 | Krones Ag | Device and method for producing filled containers |
| DE102019104387A1 (en) * | 2019-02-21 | 2020-08-27 | Krones Ag | Device and method for producing filled containers |
| US11535439B2 (en) | 2019-10-18 | 2022-12-27 | Sonoco Development, Inc. | Pasteurization pouch with barrier |
| WO2022018948A1 (en) * | 2020-07-20 | 2022-01-27 | トタニ技研工業株式会社 | Bag making method and welding method |
| KR102305454B1 (en) * | 2021-03-23 | 2021-10-01 | 쓰리애플즈코스메틱스 주식회사 | Cosmetic airtight container |
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- 2013-08-28 CN CN201320538058.2U patent/CN203544483U/en not_active Expired - Fee Related
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| CN112272890B (en) * | 2018-05-28 | 2024-02-20 | 大日本印刷株式会社 | Battery, heat sealing device and manufacturing method of battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5985930B2 (en) | 2016-09-06 |
| KR20140029258A (en) | 2014-03-10 |
| CN203544483U (en) | 2014-04-16 |
| CN103662190B (en) | 2016-11-23 |
| KR102051683B1 (en) | 2019-12-03 |
| JP2014049197A (en) | 2014-03-17 |
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