CN1795128A - Vessel for prepared food and prepared food using the vessel - Google Patents

Abstract

A vessel for prepared food, comprises a vessel body storing contents and a cover body sealed to the upper end flange part thereof. The cover body further comprises an unsealing tab part, tear start points provided on both sides of the unsealing tab part, and tear stopping half-cuts of substantially U- or arc-shape formed on straight lines extending from both start points in tearing directions so as to be projected in the tearing directions. Thus, the tear of the cover body can be surely stopped by the tear stopping half-cuts to prevent the separation of a band-shaped flap part from the cover body.

Description

Container for fast food and the instant food that uses this container

Technical area

The present invention relates to be applicable to the container that injects the instant food such as cup hand-pulled noodles that are necessary to cover again lid behind the hot water and be applicable to the container that injects behind the hot water the instant food such as fast food fried flour of hot water evacuation, and be accommodated in the instant food in these containers.

Background technology

The container that the vessel back seal has this type instant food of lid to use requires the tack-free leak tightness of sealing when when transportation and operation.But,, then can be created in when eating instant food the problem that lid can not peel from the body easily if lid is sealed on the vessel securely.

For the Kaifeng, tank capacity ground that instant food with sealed type lid is used, suggestion is made as local Kaifeng formula with lid.For example the spy drives the airtight container of motion in clear 54-88490 number (patent documentation 1), its lid has, the lid body that is made of the film with orientation easy-to-rupture, near the pair of notches from being provided with the outwards outstanding protrusion tab of lid body, the root at protrusion tab on the differently-oriented directivity of above-mentioned film.Protrusion tab is upwards lifted, then cover body and be torn to other one distolateral from pair of notches, lid is broken a seal with band shape.

But the spy drives the airtight container in clear 54-88490 number, if it is excessive to lift the strength of protrusion tab, thereby can cause that then the strap that links to each other with protrusion tab arrives the problem that the other end makes it separate from vessel.Instant food such as cup hand-pulled noodles or fast food fried flour must carry out capping inject hot water in the container that breaks a seal for the cooking after again, thus can be easily once more the lid of capping be desirable.

The container that the fast food fried flour is used, being necessary after injecting hot water can be easily with the hot water evacuation, so the lid that uses has fin (tab) portion of Kaifeng usefulness and the tab portion of formation separated material mouth usefulness.This lid has for example from the top layer structure that is made of plastic sheeting, paper, aluminium foil, sealing film in turn.Lid is by only having the zone of separated material mouth and do not have other zones of peristome to form on aluminium foil and sealing film; Between two zones, the poroid wiring that only is arranged on plastic sheeting and the paper is arranged.In the zone with separated material mouth, paper and aluminium foil are peeled off easily.

During fast food fried flour in edible container with such lid, the tab portion of at first arresting Kaifeng usefulness breaks a seal lid to assigned position, injects behind the hot water this upper cover body and place in container.Subsequently, if the tab portion that will form separated material mouth usefulness upwards lifts,, present the separated material mouth while then the plastic sheeting in the lid and paper disconnect from aluminium foil along poroid wiring and peeling off.Make hot water after the separated material mouth is discharged container lean, with remaining this its all peel off edible fast food fried flour.But this lid, be not only layer complex structure with separated material notch portion, and need poroid wiring and make the part Kaifeng that just has the separated material mouth, the adjustment of fissility that is arranged on the remover between paper and the aluminium foil in addition is also very difficult, has the high shortcoming of cost.

As the lid that can remove complicated layer structure with separated material notch portion, for example the spy open 2002-160779 number (patent documentation 2) but proposed to have a plurality of pull wing sheets (pull tab) outstanding from the neighboring but and carve and established the poroid wiring used from the inboard two separated material mouth openings that extend of two side direction lids of the root of each pull wing sheet or the lid that has the separated material function of hemisection groove.But this lid, but a plurality of pull wing sheets must be broken a seal singly, have the very bothersome shortcoming of formation of separated material mouth.

The spy opens 2002-160758 number (patent documentation 3) and has proposed following lid with separated material function, this lid, but but the pull wing sheet of Kaifeng usefulness and the pull wing sheet of formation separated material mouth usefulness are configured on the opposite face position of neighboring, but near the pull wing sheet that forms separated material mouth usefulness, both sides from the root of fin, on the surface of lid, carve and established the first hemisection groove, and carve with the waveform shape on the back of lid near the first hemisection groove and to have established the second hemisection groove with the waveform shape.The paddy portion of two hemisection grooves of waveform shape is positioned on the edge part of vessel.Therefore, but if upwards lift the pull wing sheet that forms separated material mouth usefulness, then formed a plurality of separated material mouths by the first and second hemisection groove.

But the spy opens 2002-160758 number lid, because in both sides two hemisection grooves are arranged, so also have complex structure, the shortcoming that cost is high.And this lid has the layer structure that is formed by paper, aluminium foil, polyethylene sealing film lamination from top, utilizes the plastic deformation of aluminium foil can obtain quiet retentivity (lid is kept the character of the state of lifting), and therefore the distinctive problem of aluminium is arranged.That is, have the lid of aluminium foil, aspect the burning disposal after use, can cause because the cal val of aluminium foil is many damage incinerator, fusion is integrated and problem that firing efficiency is reduced.So,, wish not use lid with aluminium foil from the viewpoint of environmental protection as far as possible.Therefore, even do not use aluminium foil, the container of when injecting hot water, also wishing to obtain to be easy to keep the instant food of lid Kaifeng state to use.

Again, in order to improve the separated material performance of the lid container that has the separated material function, when making container lean, the size with the separated material mouth in the scope that the food of hope in container does not spill enlarges as far as possible; But if only enlarge the size of separated material mouth, it is big that the resistance of then tearing also can become.Therefore constant big and the lid that has the separated material function that the separated material mouth broadens of the resistance of wishing to obtain to tear.

Patent documentation 1: the spy opens clear 54-88490 communique

Patent documentation 2: the spy opens the 2002-160779 communique

Patent documentation 3: the spy opens the 2002-160758 communique

Summary of the invention

So, the object of the present invention is to provide a kind ofly can make easily part Kaifeng of sealed type lid, and the container that can not use from the instant food that lid breaks away from of the banded wing flap portion that forms by Kaifeng.

The container that provides a kind of instant food cheaply to use is provided another purpose of the present invention, this container has the sealed type lid, described lid has the tab portion of Kaifeng usefulness and forms the tab portion of separated material mouth usefulness, not only have good separated material performance, and when injecting hot water, can easily keep the Kaifeng state of lid.

The container that provides a kind of instant food cheaply to use is provided another object of the present invention, this container has the sealed type lid, described lid has the tab portion that forms separated material mouth usefulness, this container upwards lifts by the tab portion that will form separated material mouth usefulness, can easily lid be peeled off from vessel.

Use for reference the result that above-mentioned purpose is studied with keen determination, inventor of the present invention has found following situation.

(A) at an end of the lid of airtight container body, be provided with the Kaifeng tab portion, form in the both sides of the tab portion of Kaifeng usefulness and to tear starting point, tearing starting point on the straight line of tearing the direction extension from two, being provided with to the essence of tearing the direction protrusion is that U font or circular-arc tearing stop to use the hemisection groove, make tearing halfway of lid to stop reliably, and can prevent that banded wing flap portion from separating from lid.

(B) on the lid of airtight container body, Kaifeng is arranged on peripheral edge portion roughly on the position of opposite face with the tab portion of tab portion and formation separated material mouth usefulness, Kaifeng is provided with the jut that is made of neck and head with tab portion, and forming the separated material mouth is provided with a plurality of essence with the inboard of tab portion U font crack, make its open end towards the inboard, then Kaifeng fastens with jut and a U font crack of tab portion, the Kaifeng state that keeps lid easily, again, if will form the tab portion of separated material mouth usefulness upwards lifts, then lid can be torn along the extended line in U font crack, thereby forms a plurality of separated material mouths.

(C) on an end of the lid of airtight container body, be provided with the tab portion that forms separated material mouth usefulness, inboard in the tab portion that forms separated material mouth usefulness, be provided with the U font crack of a plurality of essence, make its open end towards the inboard, and if at the leading section setting in each crack its line part of narrow more pair of angled at interval more forward, then the tearing of lid from each U font crack will become easy.

The present invention is based on such invention and finishes.

That is, first container for fast food of the present invention is characterized in that, has the vessel and the leak free of the flange part implementation in the top lid of accommodating content; Above-mentioned lid, have Kaifeng with tab portion, be arranged on above-mentioned Kaifeng with the tab portion both sides tearing starting point and since two starting points and stopping to use the hemisection groove to the U font or circular-arc the tearing of the essence of tearing the direction protrusion along tearing the straight line formation that direction extends.

The above-mentioned starting point of tearing is arranged on crack on the peripheral edge portion of above-mentioned lid or indentation for well.

Above-mentioned tearing stops to use the hemisection groove, and the position that is positioned at the center that surmounts above-mentioned lid is for well; From the above-mentioned starting point of tearing along tearing on each straight line that direction extends, being provided with Kaifeng with the hemisection groove for well; Above-mentioned Kaifeng stops not to be connected to the hemisection groove with hemisection groove and above-mentioned tearing.

Above-mentioned lid is by constituting from the top lamination thin slice that has resin film, paper sheet and heat seal film in turn at least; Above-mentioned tearing stops with hemisection groove and above-mentioned Kaifeng hemisection groove, arrives above-mentioned paper sheet in the above-mentioned lamination thin slice at least for well.The degree of depth of half and half grooving of above-mentioned paper sheet, about 30% the degree of depth that is equivalent to above-mentioned paper sheet thickness at least is for well.Above-mentionedly stop to tear the bottom surface that roughly arrives above-mentioned paper sheet with the hemisection groove for well.

Inject second container of the present invention that the instant food that carries out evacuation hot water behind the hot water is used, it is characterized in that, constitute by the lid of vessel and end boss sealed in its upper portion; At above-mentioned lid roughly on the position of opposite face, be provided with the tab portion of Kaifeng with tab portion and formation separated material mouth usefulness, above-mentioned Kaifeng tab portion, has the jut that constitutes by neck and head, the tab portion of above-mentioned formation separated material mouth usefulness, has the crack of pair of straight wire and between the crack of above-mentioned pair of straight wire and make the open end towards inboard and U font cracks a plurality of essence of being provided with, the front end in above-mentioned linearity crack and above-mentioned U font crack, all be positioned at the sealing of above-mentioned lid, above-mentioned Kaifeng is upwards lifted with tab portion, form wing flap portion by above-mentioned cap portion Kaifeng, if one of them of the through hole of the stripping portion that the front end protrusion portion of above-mentioned wing flap portion and above-mentioned U font crack or the formation by the separated material mouth form fastens, then above-mentioned wing flap portion can be remained the state in Kaifeng.

In order to improve the engaging property with above-mentioned jut, the structure that engages with above-mentioned jut in the above-mentioned U font crack, the protrusion with a Zhou Fangxiang is for well.

If above-mentioned lid has above-mentioned linearity crack and the line part in above-mentioned U font crack and the parallel easy-to-rupture of essence, then when by the tab portion of pinching above-mentioned formation separated material mouth usefulness above-mentioned lid being peeled off to form a plurality of separated material mouths from the said vesse body, it is too thin that separated material mouth front end can not become.

On the extended line in above-mentioned linearity crack and above-mentioned U font crack, on above-mentioned lid, be provided with form the separated material mouth with the hemisection groove for well.The outside that the front end in above-mentioned linearity crack and above-mentioned U font crack lays respectively at the Central Line on the sealing of above-mentioned lid is for well.The position of front end in above-mentioned sealing in above-mentioned linearity crack and above-mentioned U font crack, from outside in the scope of 30%-50% of thoughtful above-mentioned sealing width for well.

On above-mentioned lid, be provided with and tear the mark that stops, pinching the tab portion that forms above-mentioned separated material mouth usefulness, with above-mentioned lid from the said vesse body tear to stop flag for well.

In second container for fast food, the leading section in each U font crack, have more forward its at interval the line portion of narrow more pair of angled for well; Again, on the leading section in pair of straight wire crack, have more forward its at interval the line portion of wide more pair of angled for well.

The above-mentioned lid of first and second container for fast food all is to be constituted by the lamination thin slice, and described lamination thin slice has resin film, paper sheet, stiffness films and a heat seal film at least from top.At least one of above-mentioned resin film, above-mentioned stiffness films and above-mentioned sealing film has tearing property of straight line for well.

Above-mentioned resin film has quiet retentivity for well.Utilize the quiet retentivity of resin film,, keep the state (rolled state) that upwards lifts substantially by fin upwards being lifted the wing flap portion that lid is torn form.

Bonding with above-mentioned paper sheet under the state of giving above-mentioned resin film tension force, if with the direction of this tension force mode punching press above-mentioned lid identical, then can give the wing flap portion crimpiness that the Kaifeng by above-mentioned lid forms with tearing direction.

Above-mentioned resin film is constituted by polybutylene terephthalate.Above-mentioned stiffness films is constituted by the ethylene glycol terephthalate film of unidirectional or double orientation.The degree of orientation of the double orientation of ethylene glycol terephthalate film is not all.

Again, the feature of first and second container is not to limit respectively, and for example the feature of first container can be used for second container, otherwise also can.

The present invention also provides the instant food that is contained in first and second container.

(invention effect)

From Kaifeng with the both sides of tab portion tear starting point, the upwardly extending straight line in the side of tearing is provided with and tears first container for fast food that stops usefulness hemisection groove, the wing flap portion that forms by Kaifeng can not separate from lid, is the part Kaifeng that can realize certain distance.Again, the broken part of the outer ledge by making wing flap portion and the broken end of peristome fasten, and then wing flap portion can close simply.Container with such feature is applicable to and injects the instant food such as instant noodles that eat behind the hot water.

In the container that is Kaifeng of having the tab portion that forms separated material mouth usefulness that forms by a plurality of U fonts crack on the position of opposite face and having jut to use with second instant food of tab portion, be engaged on the U font crack by the jut that will break a seal with tab portion, can keep the Kaifeng state of wing flap portion at an easy rate.If a protrusion to Zhou Fangxiang is set on U font crack, then can guarantee to break a seal with the jut of tab portion and the engaging in U font crack.Again, the narrow bevelled line part of stenosis at interval is set, can improves the tearing property in U font crack by front end place in U font crack.Container with such feature is applicable to and injects the instant food such as fried flour that eat behind the hot water.

Container for fast food of the present invention has simple structure, advantage that cost is low.

Description of drawings

Fig. 1 is the block diagram of the container used of instant food of expression one embodiment of the invention.

Fig. 2 is the birds-eye view of the container used of the instant food of presentation graphs 1.

Fig. 3 is the block diagram of container Kaifeng state of using of the instant food of presentation graphs 1.

Fig. 4 is other the birds-eye view of lid of embodiment of expression the present invention.

Fig. 5 is expression the present invention birds-eye view of the lid of other embodiment in addition.

Fig. 6 is expression from the enlarged drawing of the relation of straight line of tearing starting point and prolonging and the axis of tearing the hemisection groove that stops usefulness.

Fig. 7 is the birds-eye view of the lid of expression other embodiment of another one of the present invention.

Fig. 8 is the block diagram of the container used of instant food of expression other embodiment of another one of the present invention.

Fig. 9 is the birds-eye view of the container for fast food of presentation graphs 8.

Figure 10 (a) is near the enlarged drawing the tab portion of formation separated material mouth usefulness of lid of presentation graphs 8;

Figure 10 (b) is the partial enlarged drawing of tab portion Kaifeng state of the formation separated material mouth usefulness of expression Figure 10 (a).

Figure 11 is the block diagram of an example of container Kaifeng state of using of the instant food of presentation graphs 8.

Figure 12 (a) is near the partial enlarged drawing the tab portion of formation separated material mouth usefulness of lid of expression other embodiment of another one of the present invention; Figure 12 (b) is the partial enlarged drawing of tab portion Kaifeng state of the formation separated material mouth usefulness of expression Figure 12 (a).

Figure 13 is near the partial enlarged drawing the tab portion of formation separated material mouth of lid of expression Figure 12.

Figure 14 is the birds-eye view of the lid of expression other embodiment of another one of the present invention.

Figure 15 is the upward view of the lid of expression Figure 14.

Figure 16 is the birds-eye view of Kaifeng state of tab portion of formation separated material mouth usefulness of the lid of expression Figure 14.

Figure 17 is the block diagram of the container used of the instant food of expression the present invention another other embodiment.

Figure 18 is the block diagram of the container used of the instant food of expression the present invention another other embodiment.

Figure 19 is the block diagram of the container used of the instant food of expression the present invention another other embodiment.

Figure 20 is the birds-eye view of the container used of the instant food of expression the present invention another other embodiment.

Figure 21 is the birds-eye view of the container used of the instant food of expression the present invention another other embodiment.

Figure 22 is the cutaway view of the layer structure example of expression lid of the present invention.

Figure 23 is the cutaway view of other layers structure example of expression lid of the present invention.

Figure 24 is the cutaway view of another other layers structure example of expression lid of the present invention.

Figure 25 is the cutaway view of another other layers structure example of expression lid of the present invention.

Figure 26 is the cutaway view of the hemisection groove depth used among the present invention of expression.

Figure 27 is the cutaway view of preferred embodiment of tearing the degree of depth of the hemisection groove that stops usefulness.

Figure 28 is other routine cutaway views of the hemisection groove depth used among the present invention of expression.

Figure 29 is another other routine cutaway view of the hemisection groove depth used among the present invention of expression.

Figure 30 is the birds-eye view of expression appearance of a plurality of lids of punching press from the lamination thin slice.

Figure 31 is the block diagram that the container that the instant food of presentation graphs 8 is used sealed, formed simultaneously the tab portion Kaifeng state of separated material mouth usefulness again.

Figure 32 is other routine block diagrams of another one of container Kaifeng state of using of the instant food of Fig. 8.

Figure 33 is other routine block diagrams of another one of container Kaifeng state of using of the instant food of Fig. 8.

The specific embodiment

Below, the container that the present invention uses for first and second instant food is described in detail, and the feature that hope can be understood each container also possesses on other containers.

(A) lid

(1) shape

(a) first container

An example of Fig. 1 to 3 expression the present invention first container.As shown in Figure 1, first container is by the vessel 1 of accommodating content with implemented thermosealed lid 2 constitute on the 1a of upper end flange portion of vessel 1.Lid 2 has Kaifeng tab portion 3.Kaifeng is being pinched from lid 2 with tab portion 3 because with finger and is being peeled off, so enough sizes will be arranged better.

At the peripheral edge portion of lid 2, tear starting point 4,4 with what the both sides of tab portion 3 were provided with that Kaifeng of making lid 2 can carry out easily in Kaifeng.Tearing starting point 4,4 can be that the crack also can be an indentation.In the present embodiment, be that example is carried out the following description as tearing starting point 4,4 with the crack.

The interval d in a pair of crack 4,4 ₁Kind according to content can be set as one sees fit.For example under situation for the cup-shaped instant noodles that inject hot water, if the external diameter of the 1a of upper end flange portion of vessel 1 is about 10cm, the interval d in crack 4,4 then ₁Preferably be about 4 to 8cm.Again, break a seal comprehensively, as shown in Figure 5, on the position of the opposite face of the neighboring of lid 2, the tab portion 51 of the Kaifeng usefulness of one can be set also in order when edible, to make lid 2.

As shown in Figure 2, for the sealing of content, the front end in a pair of crack 4,4 is positioned at the sealing 11 of lid 2 (having implemented thermosealed part on the 1a of upper end flange portion of vessel 1) and locates.

Tolerance is about 1mm when continuous lamination thin slice punching press, high speed are made lid 2, therefore, the front end in a pair of crack 4,4, preferably than the 11a of Central Line of the sealing 11 of lid 2 near the outside, preferably from outward thoughtfully the width of sealing 11 in 30% to 50% scope.

As shown in Figure 2, from a pair of crack 4,4 on the upwardly extending straight line in the side of tearing 4 ', 4 ', established the hemisection groove 6,6 that stops usefulness of tearing to the circular-arc or U font of tearing the essence that direction protrudes quarter on lid 2.' essence circular-arc ' herein so long as bending get final product.As shown in Figure 3, the crack of the lid 2 that just can tear with usual strength can stop reliably by tearing the hemisection groove 6,6 that stops usefulness, so banded wing flap portion 12 can not break away from.If banded wing flap portion 12 breaks away from from vessel 1, the envelope again of lid 2 difficulty that will become then.

As shown in Figure 2, tear the hemisection groove 6 that stops usefulness, when being the U font, constitute with the circular-arc connecting portion 6b that is connected this line part by a pair of line part 6a, 6a.The a pair of line part 6a of the hemisection groove 6 that stops usefulness, the interval d of 6a torn in the U font ₂Between 4～14mm for well, 6～10mm preferably; The length d of line part 6a ₃Between 2～10mm for well, 3～7mm preferably.A pair of line part 6a, 6a not necessarily want length identical.The radius of curvature of circular-arc connecting portion 6b between 2～7mm for well, 3～5mm preferably.Again, when tearing the hemisection groove 6 that stops usefulness for circular-arc the time, its radius between 2～7mm for well, 3～5mm preferably.

If tear the shape beyond U font or the circular arc of being shaped as of the hemisection groove 6 that stops usefulness, then can not obtain enough abilities of stopping of tearing.For example be linearity if tear the hemisection groove 6 that stops usefulness, when then the crack arrived, lid 2 split from the end of hemisection groove 6.

As Fig. 4 or shown in Figure 5, tear also extended line 4 ', the 4 ' inclination relatively of axis of the hemisection groove 6,6 that stops usefulness.As shown in Figure 6, the shaft angle θ that respectively tears the hemisection groove 6 that stops usefulness of each extended line 4 ' relatively ₁At 60 degree with interior for well, be preferably in 30 spend in.

In the middle of example shown in Figure 2, tear the central part of the hemisection groove 6,6 that stops usefulness, be positioned on the extended line 4 ', 4 ', but also may not be defined in this.For example beyond Fig. 4 and the occasion shown in Figure 5, as shown in Figure 7, the front end of respectively tearing a side of the hemisection groove 6 that stops usefulness also can be positioned at the end of each extended line 4 '.

As shown in Figure 2, tear the hemisection groove 6,6 that stops usefulness and be positioned at the line of centers 40 that surmounts lid 2 for well, especially preferably be positioned at sealing 11 near.

As shown in Figure 2, tear the hemisection groove 6,6 that stops usefulness, along upwardly extending straight line 4 ', 4 ', above lid 2, establish the hemisection groove 7,7 of Kaifeng usefulness quarter for well in the side of tearing from a pair of crack 4,4 for the crack that makes lid 2 can accurately arrive.The hemisection groove 7,7 of Kaifeng usefulness also can with tear the hemisection groove 6,6 that stops usefulness and be connected, but stop in order to tear reliably by tearing the hemisection groove 6,6 that stops usefulness, wish to stop in the front of tearing the hemisection groove 6,6 that stops usefulness.That is, the end of the hemisection groove 7,7 of Kaifeng usefulness leaves to good from tearing the hemisection groove 6,6 that stops usefulness.

At the hemisection groove 7,7 of Kaifeng usefulness in tearing under the situation that hemisection groove 6,6 fronts that stop usefulness stop, the front end of the hemisection groove 7,7 of Kaifeng usefulness 7 ', 7 ' and tear the hemisection groove 6,6 that stops usefulness apart from d ₄Be 1～10mm for well, be preferably 2～5mm.Again, as shown in Figure 7, the end of the hemisection groove 7,7 of Kaifeng usefulness also can be connected with a side the end that circular-arc tearing stops the hemisection groove 6,6 of usefulness.

(b) second container

Fig. 8 to 11 has illustrated an example of the present invention's second container.In Fig. 8 to 11, give identical reference marker with same parts or the identical part of Fig. 1 to 3.In the middle of this example, lid 2 has Kaifeng with tab portion 3 and be arranged on the roughly tab portion 5 of the locational formation separated material of opposite face mouth usefulness.

Shown in Figure 10 (a), form the tab portion 5 of separated material mouth usefulness, have pair of straight wire crack 8a, 8b and between two linearity crack 8a, 8b with the crack 9,9 ' of the U font of a plurality of essence of forming at interval about equally.On a U font crack 9, be provided with a Zhou Fangxiang protrusion 9b.Each the U font crack 9 ' that does not have the Zhou Fangxiang protrusion is made of with the curve 9b ' that is connected two line part 9a ', 9a ' a pair of line part 9a ', 9a '.Again, have the U font crack 9 of Zhou Fangxiang protrusion, by the curve 9b of a pair of line part 9a, 9a, connection two line part 9a, 9a and on the part of curve 9b to Zhou Fangxiang protrusion 9b " constitute.Kaifeng is with the lug boss 31 of tab portion 3, and has Zhou Fangxiang protrusion 9b " U font crack 9 engage, kept the Kaifeng of lid 2.

Have Zhou Fangxiang protrusion 9b " U font crack 9 can have one usually.Again, U font crack 9 ' has 1～5 for well, preferably has 1 or 2.When being provided with a plurality of U fonts crack 9 ', as shown in Figure 9, be arranged on have Zhou Fangxiang protrusion 9b " the both sides in U font crack 9 for well.

Shown in Figure 10 (a), each U font crack 9,9 ', its open end inwards forms.The crack 9 of the U font of essence, 9 ' shape as long as have the connecting portion of arc-shaped bend, do not have special qualification.The Zhou Fangxiang protrusion 9b in crack 9 " shape, be not defined as circular-arc shown in Figure 10 (a), rectangle, trapezoidal, triangle etc. can.

Shown in Figure 10 (a), in order to guarantee heat seal fully and can easily to tear from linearity crack 8a, 8b and line part 9a, 9a ', pair of straight wire crack 8a, 8b and each U font crack 9,9 ' front end, the sealing 11 that all is positioned at lid 2 is for well.

Because the tolerance when lamination thin slice punching press at high speed is made lid 2 is approximately 1mm, so the front end of pair of straight wire crack 8a, 8b and each U font crack 9,9 ' front end, all be arranged on the 11a of Central Line than the sealing 11 of lid 2 near the outside for good, be positioned at from outside the thoughtful scope D of sealing 11 ₁30% to 50% scope in for well, preferably be positioned at from outside the width D of thoughtful sealing 11 ₁30% to 40% scope in.

Shown in Figure 10 (a), on straight line 43a, 43b, 44,44 ' that each front end from linearity crack 8a, 8b and U font crack 9, each line part of 9 ' extends, carve and be provided with the hemisection groove 71 that forms separated material mouth usefulness for well.By establishing the hemisection groove 71 that forms separated material mouth usefulness quarter, can improve the characteristic of tearing of lid 2.Each forms the front end of the hemisection groove 71 of separated material mouth usefulness, separates several cm for well from upper end flange portion.As required, form on the front end of hemisection groove 71 of separated material mouth usefulness, tear direction and also can be set to the hemisection groove that protruding U font or circular-arc tearing stop usefulness at each.

When forming lid 2 by lamination thin slice with easily openable, make its this easily openable direction and lid 2 to tear direction essence consistent with well.Thus, pinching when the tab portion 5 that forms separated material mouth usefulness peels off lid 2, lid 2 from the front end of pair of straight wire crack 8a, 8b and each U font crack 9,9 ' front end can easily tear along the easily openable direction along straight line.Again, have at lid 2 under the situation of easily openable, can omit the hemisection groove 71 that forms separated material mouth usefulness.

As shown in Figure 9, with on the tab portion 3, be provided with the jut 31 that constitutes by neck 31a and head 31b in Kaifeng.As shown in figure 11, by making jut 31 and having Zhou Fangxiang protrusion 9b " 9 engagings of U font crack, can easily keep the Kaifeng state of lid 2.Shown in Fig. 9 and protruding 10 (a), if the suitable head 31b of jut 31 and the width d of neck 31a of setting ₅, d ₆And have a Zhou Fangxiang protrusion 9b " maximum width (Zhou Fangxiang protrusion 9b is arranged " the width of the position) d in U font crack 9 ₈, then the engaging in jut 31 and U font crack 9 will increase, and after engaging, jut 31 can not break away from from U font crack 9 easily.If Zhou Fangxiang protrusion 9b is arranged in the both sides in U font crack 9 ", then jut 31 comes off from U font crack 9 on the contrary easily.As shown in Figure 9, Kaifeng also can be provided with curve 32,32 with tab portion 3 in the both sides of jut 31.

Particularly, the width d of head 31b ₅Width d than neck 31a ₆Long 1～3mm is for well.The width d of connecting portion 9b ₈Width d than head 31b ₅Narrow, and at the width d of neck 31a ₆On for well, be specially the width d of connecting portion 9b ₈Width d than head 31b ₅Narrow 0.5～2mm is for well.The width d of connecting portion 9b ₈Interval d than two line part 9a, 9a ₉Long 0.5～2mm is for well.

When the instant food in the container is fried flour, the width d of head 31b ₅Be 8～12mm for well; The width d of neck 31a ₆Be 7～9mm for well; The width d of connecting portion 9b ₈Be 8～10mm for well; The interval d of each U font crack 9,9 ' two line parts ₉Be 7～9mm for well; The interval d in linearity crack 8a and U font crack 9 ' ₁₀, linearity crack 8b and U font crack 9 ' interval d ₁₀And U font crack 9,9 ' interval d ₁₁, each naturally 3～6mm for well.

In the embodiment shown in Fig. 8～11, the interval d in a pair of crack 4,4 that is provided with the both sides of tab portion 3 in Kaifeng ₇, can take the circumstances into consideration to set according to the kind of content.For example, in for the cup hand-pulled noodles that injects hot water, if the external diameter of the 1a of upper end flange portion of vessel 1 is approximately 18cm, the interval d in crack 4,4 then ₇Setting between 9～15cm for well.

As Fig. 8 and shown in Figure 9, on the position that the instant food (fried flour etc.) of lid 2 in container do not spill, can discharge hot water efficiently, mark 10 that expression peels off boundary is set for well; The position of mark 10, the length that can set separated material mouth 15 for are approximately 1～5cm for well.

If pinching the tab portion 5 that forms separated material mouth usefulness, if on lid 2, only will peel off from vessel 1 with the part 13 that hatching is represented, then shown in Figure 10 (b), can obtain a plurality of separated material mouths 15, from each U font crack 9,9 ' the strap portion 14,14 ' that prolongs, be enclosed on the 1a of upper end flange portion of vessel 1.

(c) other examples of second container

Figure 12 represents other examples of second container.In this example, except leading section 9c, 9c ' on U font crack 9,9 ' line part 9a, 9a ' are made of the narrow straight line of interval stenosis, and leading section 81a, the 81b of pair of straight wire crack 8a, 8b are identical with the example shown in Fig. 8～11 by becoming at interval beyond open straight line constitutes.As shown in figure 12, in this example,, the tab portion 51 of a Kaifeng usefulness can also be set on tab portion 5 next doors that form each material mouthful usefulness.

In order to shorten the time of evacuation hot water, with the width d of separated material mouth 15 ₁₃, d ₁₃' be provided with widelyer for well, but like this, the area of the cap portion of peeling off from sealing 11 will become greatly, and the resistance that breaks a seal also will become big. as far as possibleThe Kaifeng resistance peeling off at first maximum, and if the stripping area of sealing 11 become big, then can feel very big initial stage resistance.Therefore shown in Figure 12 (a), if on each linearity crack 8a, 8b and U font crack 9,9 ' front end, so that the stripping area of sealing 11 becomes big mode gradually bevelled line part 9c, 9c ', 81a, 81b are set, then can not feel bigger initial stage resistance, can successfully form the Kaifeng of the tab portion 5 of separated material mouth usefulness.

The length of each front end line part 9c, 9c ', 81a, 81b between 0.5～3mm for well.As shown in figure 13, the angle θ of each front end line part 9c, 9c ', 81a, 81b and line part 9a, 9a ', 8a, 8b ₂Between 120 degree～170 degree for well.If angle θ ₂Outside this scope, then (replace hemisection groove 71, the easily openable direction when easily openable is arranged) and have the danger that to tear with linear fashion from each 9c of straight front-end portion, 9c ', 81a, 81b along the hemisection groove 71 that forms separated material mouth usefulness.Again, angle θ between each front end line part 9c, 9c ', 81a, 81b and each line part 9a, 9a ', 8a, 8b ₂There is no need identical.Again, as substituting of straight line, each leading section 9c, 9c ', 81a, 81b also can be curve.

Spacing d between the front end of leading section 9c, 9c (9c ', 9c ') ₁₂, than the spacing d between two line parts of 9 (9 ') of U font crack ₉Narrow 0.5～3mm is for well.Be specially, when the instant food in the container is fried flour, the spacing d between the front end of leading section 9c, 9c (9c ', 9c ') ₁₂Between 6～8mm for well, the width d of separated material mouth 15 ₁₃, d ₁₃' between 4～7mm for well.

The above-mentioned condition relevant with the position of linearity crack 8a, 8b and U font crack 9,9 ' front end also satisfied for well in position in the sealing 11 of the front end of leading section 9c, 9c ', 81a, 81b.

(d) other example

Lid shape in first and second container is not limited to shape as shown, only otherwise changing purport of the present invention then can add various variations.For example, the example of separated material function has been represented to pay for the lid of first container in Figure 14～16.Parts or part identical with Fig. 1～3 example illustrated in Figure 14～16 are given identical reference sign.

In example shown in Figure 14, form the tab portion 105 of separated material mouth usefulness, separated from the lid 2 by hemisection groove 72.Hemisection groove 72 extends to a pair of line part 72a, the 72a of lid 2 inboards by the both sides from the tab portion 105 that forms separated material mouth usefulness and the connecting portion 72b of two line part 72a, 72a constitutes.As shown in figure 15, in the zone that surrounds by hemisection groove 72 (shown in the hatching) 17, on the quilt cover of lid 2, be provided with the hemisection groove 73 of a plurality of formation separated material mouth usefulness.

When constituting lid by the lamination thin slice that skin and internal layer are set on paper sheet when, in the example shown in Figure 14～16, hemisection groove 72 connects skin and paper sheet, and each 73 of hemisection groove that form separated material mouth usefulness connects internal layer.In the zone 17 that is surrounded by hemisection groove 72, at the inner face formation peel ply of paper sheet.Therefore,, then peeled off from internal layer, and the interior layer segment that is equivalent to a plurality of separated material mouths also is removed, therefore, as shown in figure 16, a plurality of separated material mouths 15 occurred by 72 area surrounded of hemisection groove 17 if upwards lift the tab portion 5 that forms separated material mouth usefulness.And in example shown in Figure 14, hemisection groove 72 can be the U font, also can be square.

Figure 17 represents to have the container of lid 2, and described lid 2 is provided with slit-shaped through hole 34 on the position that is equivalent to break a seal with the outer edge of the 1a of upper end flange portion of tab portion 3.This container is identical with first container except slit-shaped through hole 34.In this container, when the lid 2 in Kaifeng turns back on the detent position, the 1a of upper end flange portion is engaged on the slit-shaped through hole 34, therefore improved envelope property again.As the alternative structure of slit-shaped through hole 34, also the crack can be set.

Figure 18 is illustrated in the container that slit-shaped through hole 34 and other tab portion 115 are set on the lid 2.This container is identical with first container except slit-shaped through hole 34 and tab portion 115.By tab portion 115 is engaged on the slit-shaped through hole 34, can keep the Kaifeng of lid 2.

Situation when Figure 19～21 have been represented vessel 1 for cuboid.In Figure 19, lid 2 is the square of essence, and the bight on diagonal line roughly being provided with Kaifeng with tab portion 3 with form the tab portion 5 of separated material mouth usefulness.In Figure 20,, being provided with Kaifeng with tab portion 3 at the substantial middle place of a minor face of rectangular lid 2; At the substantial middle place of another minor face, be provided with the tab portion 5 that forms separated material mouth usefulness.In Figure 21, the substantial middle place on a long limit of rectangular lid 2 being provided with Kaifeng with tab portion 3; Substantial middle place on another long limit is provided with the tab portion 5 that forms separated material mouth usefulness.

(2) the lid layer structure of lamination thin slice

Figure 22～25 illustrations the preferred layer structure of lid 2.Lid 2 is provided with outer 2a and internal layer 2b and forms on paper sheet 21.In example shown in Figure 22, outer 2a has resin film 22 at outermost layer, and internal layer 2b has stiffness films 23, light-proofness ink lay 24, sealing film 25 successively from paper sheet 21 1 sides.Between resin film 22 and the paper sheet 21,, the adhesive linkage 27 that is made of bond layer 26 and the polyethylene layer 27 that extrudes layering is arranged respectively between paper sheet 21 and the stiffness films 23 and between light-proofness ink lay 24 and sealing film 25.Adhesive linkage also can only be made of polyethylene layer 27.

Example shown in Figure 23 is except internal layer 2b does not have stiffness films 23, identical with example shown in Figure 22.Example shown in Figure 24 is paid layer and the light-proofness ink lay 24 except substitute the light-proofness that internal layer 2b has with aluminium foil 28, and is identical with example shown in Figure 23.Example shown in Figure 25 is identical with example shown in Figure 22 alternately except resin film 22 and stiffness films 23.

Below, be described in detail at each layer.

(a) resin film

In the lid 2 of the present invention, has resin film 22 as the layer of giving gas barrier property etc.As the material of resin film 22, can enumerate polyester, polypropylene, nylon etc.When using mylar, can obtain the outstanding especially lid of fragrance protectiveness or gas barrier property.When using polypropylene film, can obtain the outstanding lid of moisture retention.

As mylar, can enumerate the film that constitutes by polybutylene terephthalate (PBT), polyethylene terephthalate (PET), PEN (PEN), PBN (PBN) etc.PBT film and PET film can obtain with low price as commercially available product.Particularly the PBT film is very outstanding aspect quiet maintenance (dead hold) property, fragrance protectiveness, gas barrier property and resistance to effect of heat, so preferred.

The PBT film is basically by 1, the saturated polyester film that 4-butylene glycols and terephthalic acid constitute.But, do not influencing in the scope of rerum naturas such as heat-shrinkable, can contain 1, diol component beyond the 4-butylene glycols or the carboxylic acid composition beyond the terephthalic acid as copolymer composition.As such diol component, for example can enumerate ethylene glycol, diethylene-glycol, neopentyl glycol, 1,4-cyclohexane methanol etc.In addition, as the dicarboxylic acid composition, for example can enumerate isophthalic acid, decanedioic acid, adipic acid, azelaic acid, succinate etc.As the concrete example of the PBT resin that constitutes the PBT film, can enumerate the homopolymerization PBT resin that for example is called " ト レ コ Application " by east beautiful (strain) commercially available commodity.

The PET film is the saturated polyester film that is made of ethylene glycol and terephthalic acid basically.But, in the scope of the characteristic that does not influence the PET film, can contain ethylene glycol diol component or terephthalic acid carboxylic acid composition in addition in addition as copolymer composition.As such diol component, for example can enumerate diethylene-glycol, 1,4-butylene glycols, neopentyl glycol, 1,4-cyclohexane methanol etc.In addition, as the carboxylic acid composition, for example can enumerate isophthalic acid, decanedioic acid, adipic acid, azelaic acid, succinate etc.The PET film is used as biaxially oriented film usually and sells, and for example can enumerate " the Le ミ ラ one " in east beautiful (strain), " ester film spins in Japan " of Japan's weaving (strain) or " the エ Application Block レ Star ト PC " of ユ ニ チ カ (strain) etc.

Mylar is not limited to the material that only is made of single resinous principle, can be made of the various kinds of resin composition.As the combination of resinous principle, except the combination of multiple alkide resin, can also enumerate in the scope of not damaging its characteristic the material that has added other thermoplastic base resins to one or more alkide resin.As other thermoplastic base resins, can enumerate polyphenylene sulfide (PPS), polyamide (PA), polyimide (PI), polyamidoimide (PAI), polyethersulfone (PES), polyetheretherketone (PEEK), polycarbonate, polyurethane, fluorine resin, polyolefin such as polyethylene, polypropylene, polyvinylchloride, thermoplastic elastomer etc.For example, when using the PBT film,, then can improve the film forming when making film, can obtain the outstanding PBT film of homogeneity of thickness if contain polyethylene in the PBT resin as film raw material as resin film 22.When containing other thermoplastic base resins, with regard to its ratio, be preferably 5～20 quality % when whole mylar is made as 100 quality %, more preferably 5～15 quality % are preferably 5～10 quality % especially.Therefore, unless otherwise specified, the term of Shi Yonging " PET film " and " PBT film " are interpreted as not only being meant the material of PET or these single compositions of PBT in this manual, also comprise the composite that is made of PET or other thermoplastic base resins of PBT+.

According to the different purposes of container for fast food, can suitably contain additives such as colorants such as stabilizers such as plasticizer, antioxidant or ultraviolet absorbent, antistatic agent, inhibiter, dyestuff or pigment, the lubricant that is used to improve liquidity, inorganic filler in the resin film.

Consider that from practical aspect the thickness of resin film 22 is preferably about 5～50 μ m.If the thickness that will make resin film 22 is difficult to realize less than about 5 μ m technically.In addition, when the thickness of resin film 22 surpassed about 50 μ m, the tearing property of lid 22 can descend.Be preferably 10～30 μ m.The PBT film of about 5～50 μ m of thickness has sufficient quiet retentivity, fragrance protectiveness and gas barrier property.

The percent thermal shrinkage of PBT film, MD (operating direction) and TD (Width) all below 2% for well.Percent thermal shrinkage is by measuring the PBT film in 10 minutes in 150 degree heating.Percent thermal shrinkage is the PBT film below 2%, can inflate the shaping manufactured by air cooling.As method, can enumerate for example method of record in WO 2004/026558 by air cooling inflation shaping manufactured PBT film.

In order tearing of lid 2 can easily to be carried out, can use article for well with unidirectional easily openable as resin film 22.As the film with the easily openable that makes progress at folk prescription, the mylar that can adopt the different double orientation of the one-way orientation or the degree of orientation is for well.The different double orientation PET film of degree of orientation is sold on market as [エ Application Block レ Star ト PC] (ユ ニ チ カ (strain)).As described later, in order to pay resin film 22 tearing property of straight line, also can form parallel linear trace and/or a plurality of minute apertures of a plurality of essence.

(b) paper sheet

Lid 2 has the paper sheet 21 of paying layer as quiet retentivity.The kind of paper is unqualified, comprises synthetic paper.The weight of the unit area of paper sheet 21 is approximately 60～110g/m ²For good, preferably be approximately 75～90g/m ²If the discontented about 60g/m of the weight of the unit area of paper ², a little less than then the deflection of paper can be undue, can not pay sufficient quiet retentivity.On the other hand, if the weight of the unit area of paper surpasses about 110g/m ², then only can cause the increase of cost, can further not improve quiet retentivity.

(c) stiffness films

In order to improve the rigidity of lid 2, also can have stiffness films 23.As stiffness films 23, use the PET film for well.In order to improve the easy-to-rupture of lid 2, as the PET film, the PET film (for example above-mentioned (エ Application Block レ Star ト PC)) that uses the different double orientation of the one-way orientation or the degree of orientation is for well.In order to improve the easy-to-rupture of lid 2, can on stiffness films 23, form vestige and/or a plurality of minute apertures of the parallel wire of a plurality of essence.

(d) light-proofness is paid layer

Because daylight or ultraviolet ray cause the rotten of instant food, lid 2 has light-proofness ink lay 24 or aluminium foil 28 in order to prevent.Light-proofness printing ink, so long as for example the such printing ink that comprises black or dark coloured pigment or dyestuff of image-stone China ink just there is no particular limitation.Light-proofness ink lay 24 has benefit free from environmental pollution when burning disposal, and can utilize metal detector to carry out the benefit that whether has metallic foreign body to survey in the airtight container in addition.Therefore, not only improved the safety of instant food more, also can make and check that cost significantly reduces by utilizing metal detector.Aluminium foil 28 has remarkable light-proofness, gas barrier property, fragrance protectiveness etc.

The thickness of light-proofness ink lay 24 is with depending on the black pigment in the printing ink or the concentration of dyestuff, as long as but generally can cover the degree of ultraviolet ray and visible light.The thickness of aluminium foil 28 at 3～15 μ m for well, 7～12 μ m preferably.

(e) heat sealing layer

Heat sealing layer at the upper end flange portion 1a place of vessel 1 is sealing film 25 or hot melt layer.Sealing film 25 can be formed by polyethylene foil, no extended polypropylene film, ionic cross-linked polymer resin film, polystyrene etc.Again, can easily peel off from vessel 1 in order to make lid 2, sealing film 25 has easy fissility for well.Therefore, sealing film 25 has more weak thermal bonding for well; Hot melt layer can use known article.

As sealing film 25, can use the lamination thin slice, described lamination thin slice for example has polyvinyl body thin film and low molecular weight polyethylene film in turn from paper sheet 21 1 sides.The thickness of this polyvinyl body thin film greatly between 10～40 μ m for well, preferably be about 20～30 μ m.Again, the thickness of low molecular weight polyethylene film greatly about 5～20 μ m for well, preferably be about 7～15 μ m.Such lamination polyethylene foil is for example sold on market with 760FD (eastern beautiful built up membrane (strain) system).As sealing film 25, also can use the film that constitutes by ethylene-vinyl acetate copolymer (EVA) and poly compound again.In the film that constitutes by this compound, as polyethylene, use be wire low density polyethylene (LDPE) (LLDPE) for well.The thickness of the film that constitutes by this compound greatly between 10～40 μ m for well, preferably about 20～30 μ m.Again, the thickness of hot melt layer for well, is preferably 20～40 μ m between 10～50 μ m.

The sealing film 25, can be formed by sealing film's (spy opens 2004-26190 number) that resin combination constitutes, and described resin combination comprises straight chain shape ethylene [density (JISK6922): 0.870～0.910g/m ³, MFR (JIS K6921,190 ℃, 2.16kg load): 1～100g/10 minute] and polystyrene; Above-mentioned straight chain shape ethylene is that alpha-olefin by ethene and carbon number 3～18 carries out copolymerization and obtains.Lid 2 with the heat sealing layer that is made of the sealing film if be used for the heat seal of vessel 1, then can be guaranteed leak tightness and easily openable.

In order to pay superior the tearing property of straight line of lid 2, on sealing film 25, also can form vestige and/or a plurality of minute apertures of the parallel wire of a plurality of essence.

(3) degree of depth of hemisection groove

Figure 26 is illustrated in the lid 2, is provided with the hemisection groove 7 of tearing the hemisection groove 6 that stops usefulness, Kaifeng usefulness or forms the section at position of the hemisection groove 71 of separated material mouth usefulness.In Figure 26, give identical mark with identical parts embodiment illustrated in fig. 22 or part again.The hemisection groove 71 of tearing the hemisection groove 7 of the hemisection groove 6 that stops usefulness, Kaifeng usefulness and forming separated material mouth usefulness all reaches paper sheet 21 at least for well above lamination thin slice 20; Reach depth D ₂For good, described depth D ₂At least be equivalent to paper sheet 21 thickness D ₃About about 30%.

As shown in figure 21, tear the hemisection groove 6 that stops usefulness and preferably can arrive the place, bottom surface that is roughly paper sheet 21.Tear the bottom surface that the hemisection groove 6 that stops usefulness roughly arriving paper sheet 21 by making, can improve the ability of stopping of tearing more.

But, invade in the stiffness films 23 if tear the hemisection groove 6 that stops usefulness, the hemisection groove 7 of Kaifeng usefulness and the hemisection groove 71 of formation separated material mouth usefulness, then the rigidity of lid 2 will become low.If these hemisection grooves are invaded in light-proofness ink lay 24 or the aluminium foil 28 (with reference to Figure 24), light-proofness will be worsened again.

Figure 28 illustration the section at position that in the lid shown in Figure 14～16 2, is provided with hemisection groove 72 and forms the hemisection groove 73 of separated material mouth usefulness.This example, (1) form the back side formation of the hemisection groove 73 of separated material mouth usefulness from lamination thin slice 20, and (2) are identical with example shown in Figure 27 except being provided with on the inner face of paper sheet 21 peel ply 29.Therefore in Figure 28, parts identical with example shown in Figure 27 or part are endowed identical reference marker.Zone 17 can easily be peeled off from internal layer 2b along hemisection groove 72, at this moment, the cap portion that is equivalent to the separated material mouth also together can be removed by hemisection groove 73, so a plurality of separated material mouths 15 (with reference to Figure 16) occurred.

Figure 29 is illustrated in other examples of section at position that are provided with U font hemisection groove 72 in the lid 2 shown in Figure 14～16 and form the hemisection groove 73 of separated material mouth usefulness.This example does not have stiffness films 23 and light-proofness ink lay 24 except internal layer 2b but has the aluminium foil 28, and is identical with the example of Figure 28.

(4) preparative treatment of each film

(a) formation of linear trace

In order further to improve the easy-to-rupture of lid 2, in resin film 22, stiffness films 23 and sealing film 25, at least one, can form the parallel linear trace of a plurality of essence according to following method.

In order to annex film strength and good straight line easy-to-rupture, the degree of depth of linear trace be each film thickness 1～40% for well, be specially 0.1～10 μ m for well.The width of linear trace between 0.1～10 μ m for well, the interval between the linear trace in the scope of 10～200 μ m for well.

In order on each film 22,23 and 25, to form linear trace, for example can adopt disclosed method among the WO03/091003.In the method, have on the surface on the roll or metal sheet of the fine particle of a plurality of Mohs' scale of hardnesss more than 5,, can on film, form the parallel linear trace of a plurality of essence while push moving contact by the film that will move continuously.As fine particle, can use the adamas fine particle for well.As with film by the mechanism that overwhelms on roll or the metal sheet, can adopt blast injection mechanism or the moving contact brush on film for well.By the linear trace of this method acquisition, because do not connect film, so, also can guarantee sufficient fragrance protectiveness and gas barrier property even will form the mylar of linear trace uses as resin film 22.

Linear trace at least on the single face of film 22,23,25 integral body form.Thus, irrelevant with the orientation of film self, each film 22,23 and 25 is endowed the straight line easy-to-rupture that folk prescription makes progress, and can tear in the mode of straight line along linear trace from position arbitrarily.

(b) formation of minute aperture

In order to improve the easy-to-rupture of lid 2, at least one in resin film 22, stiffness films 23 and sealing film 25, can form a plurality of minute apertures by following method comprehensively.

Minute aperture has average opening footpath and the about 500/cm of 0.5～100 μ m ²Above distribution density is for well.If the discontented about 500/cm of the distribution density of minute aperture ², then tearing property is with deficiency.From the viewpoint of film strength, the distribution density of minute aperture is 1 * 10 ³～1 * 10 ⁴Individual/cm ²For good, be preferably 1 * 10 ³～5 * 10 ³Individual/cm ²

On each film, form minute aperture, for example can adopt No. the 2063411st, Japan's patent and spy to open disclosed method in 2002-59487 number.For example in No. 2063411 disclosed method of Japan's patent, adhere to from the teeth outwards that a plurality of to have acute angle part, Mohs' scale of hardness be between atomic first roll (roll that above-mentioned linear trace uses is identical with forming) and ganoid second roll more than 5, film is passed through while bearing impartial pressing force, so, on film, can form a plurality of minute apertures.Can use iron class roll, stainless steel-like roll, special steel rolls etc. such as having implemented nickel plating, chromium plating as second roll.

Forming under the situation of fine holes on the sealing film 25, minute aperture can be through hole or non-through hole.Be provided with under the situation of fine holes on resin film 22 or stiffness films 23, from the leak tightness viewpoint of container, minute aperture should non-through hole.By regulating the pressing force between first roll and second roll, can form a side or two sides in through hole and non-through hole.

(B) vessel

Vessel 1 can form by synthetic resin such as paper, foamed styrenes.Under the situation that is the paper-made vessel body, not only burn easily, and have the benefit that when burning, can not produce the waste gas of contaminated environment.Under the situation that is foamed styrene container made body, has the superior benefit of heat retaining property again.The shape of vessel 1 is not limited to shown in the figure, according to the kind of content multiple variation can be arranged.

[2] manufacture method of lid

(A) manufacture method of lamination thin slice

Under the situation of example formation lamination thin slice 20 as shown in Figure 22, two sides at strip shape paper sheet 21 forms adhesive linkage, laminated resin film 22 on one side, the lamination thin slice that lamination stiffness films 23 and light-proofness ink lay 24 and sealing film 25 form on another side.On each film 22,23 or 25, also can set in advance parallel linear trace and/or a plurality of minute apertures of a plurality of essence as required.Make the easy-to-rupture direction of each film 22,23 and 25 consistent with the length direction of strip paper sheet 21.

Under with the situation of resin film 22 laminations to the paper sheet 21, in the elastic deformation zone of resin film 22 (1～3% elongation), apply under the upwardly extending state in MD side, resin film 22 is bonded on the paper sheet 21 to well.But given the lamination thin slice 20 crimpiness thus.

For the extension of carrying out 1～3%, as long as on resin film 22, apply the tension force of 10～20kgf/m.In that resin film 22 is extended when bonding on the paper sheet 21, be applied to tension force on the resin film 22 below 5kgf/m.PBT is relatively suitable to the resin that can elastic deformation extends.

On one side on resin film 22, apply tension force, on one side the lamination thin slice 20 bonding with paper sheet 21, have reverse crimpiness in resin film 22 sides, therefore, resin film 22 is rollback laterally.Thus, lamination thin slice 20 in fact curl (20 mosts of the time of lamination thin slice curl certainly) during rollback.Because it is of short duration smooth that lamination thin slice 20 keeps, so do not have obstacle to the punching press/heat seal operation of lid 2.If thermosealed lid 2 is peeled off from vessel 1, then lid 2 becomes rolled state.

Using under the situation of PBT as resin film 22, utilize the shape memory of PBT can make lamination thin slice 20 have the function of memory coil curved shape.For example adopt 2 kinds of methods that disclose among the WO 2004/026577, can make PBT lamination thin slice 20 with memory coil curved shape function.

First method (a) will comprise the lamination thin slice 20 of PBT film, and one side keeps the temperature T of curly form one side below the glassification transition temperature Tg of PBT ₁Carry out figuration and handle (cool working); (b) in the temperature T that surpasses Tg ₂Figuration lamination thin slice 20 is deformed into smooth shape down; (c) in the temperature T that is cooled to below the Tg ₃Be fixed as smooth shape and form.Second method, (a) (i) lamination thin slice 20 one side that will comprise the PBT film remains curling shape, and one side is surpassing Tg～do not arrive melting temperature T ₄Under carry out figuration and handle, perhaps (ii) the PBT film is remained curly form on one side on one side in temperature T ₄Under carry out figuration and handle, then, the thin film lamination body (constituting the laminate of the layer of internal layer 2b+be made of paper sheet 21 when forming by lamination thin slice 20) that comprises paper sheet 21 by lamination is made the lamination thin slice 20 with curly form; (b) temperature T that figuration lamination thin slice 20 is cooled to below the Tg ₅Fixing curly form; (c) figuration lamination thin slice 20 is being surpassed Tg～do not arrive T ₄Temperature T ₆Under be deformed into even shape; (d) be cooled to the following temperature T of Tg ₇Be fixed into even shape and constitute.Though use the PBT lamination thin slice 20 with shape memory of these method manufacturings smooth, punch process subsequently/thermosealed lid 2 has recovered crimpiness,, then take place to curl therefore if peel off from vessel 1.

(B) punching press/hemisection processing

As shown in figure 30, resin film 22 1 is sidelong places lamination thin slice 20 in the above,, then once can make a plurality of lids 2 if carry out punching press/hemisection processing by a plurality of drifts.Itself can be undertaken punching press/hemisection processing by known method.Make a pair of crack 4,4, pair of straight wire crack 8a, 8b, U font crack 9,9 ' and the hemisection direction that connects these cracks, consistent with the long side direction of strip shape paper sheet.Punch process and hemisection processing can simultaneously or be carried out continuously.

(C) heat seal on vessel

To carry out thermosealed situation after the formation lid 2 is that example describes.After accommodating content (for example dried noodle, powder soup material and eating utensils etc.) in the vessel 1, be placed on sealing film's layer 25 following and lid 2 is docked with the 1a of upper end flange portion of vessel 1, carry out heat seal.Because given easy fissility, thus the heat seal temperature in 120～160 ℃ scope for well.

Certainly after the processing of hemisection in advance, the heat seal of the punch process of lamination thin slice 20 and vessel 1 can carry out simultaneously.The PBT lamination thin slice 20 that particularly has shape memory function, thermosealed the time, the effect by heat returns to curly form, so the heat seal of punch process and vessel 1 carries out simultaneously to good.

[3] pack into the instant food and the edible order thereof of container

Be applicable to the instant food of first container, the big dip of cup hand-pulled noodles, powder seasoning for stewing vegetable, Powdered or mobile shape or rice cake red bean powder or soup stock arranged, with beverage headed by the orange juice etc.Be example when using, below its edible order described with wherein cup hand-pulled noodles.

The cup hand-pulled noodles is that liquid soup bases, the eating utensils (utensil in the pouch of perhaps packing into) with dried noodle (perhaps fried face) 42, Powdered soup stock or pouch splendid attire is encased in for example made of paper having in the round-ended cylinder shape vessel 1, upper end flange portion 1a place at vessel 1 carries out lid 2 thermosealed.

At first, if the Kaifeng that pinches lid 2 is with tab portion 3 and pull, then lid 2 can split the hemisection groove 6,6 that stops usefulness to tearing by 4, the 4 hemisection grooves 7,7 along Kaifeng usefulness from the crack, formation peristome 41 on lid 2.When being when constituting lid 2 by the PBT film, have enough quiet retentivities by tearing the banded wing flap portion 12 that forms, can keep rolled state.Therefore, directly boiling water is got final product from peristome 41 injections.

After injecting hot water, if banded wing flap portion 12 is returned on the home position, the zig-zag broken part 12 ' of then banded wing flap portion 12 both sides of the edge, 12 ' engages with the zig-zag broken part 41 ', 41 ' of peristome 41, banded wing flap portion 12 is maintained the osed top state, therefore, also can be not according to pressure zone shape wing flap portion 12.Through after the cooking time, lid 2 is all peeled off the edible hand-pulled noodles.

The instant food that is applicable to second container has fried flour.With the cup fried flour is example, below its edible order is described.When using container shown in Figure 8, the same with the situation of cup hand-pulled noodles, on lid 2, form after the peristome 41, to fasten by the U font crack 9 of the jut 31 of tearing the banded wing flap portion 12 that forms and the tab portion 5 that forms separated material mouth usefulness, then banded wing flap portion 12 is maintained the state in Kaifeng.

Inject hot water, banded wing flap portion 12 is returned to lid close on the position, after for example keeping 3 minutes, pinching the tab portion 5 that forms separated material mouth usefulness, lid 2 is peeled off to mark 10 from vessel 1.Though the hatching part 13 shown in Figure 10 (a) is together peeled off with the tab portion 5 that forms separated material mouth usefulness, each strap portion 14,14 ' and vessel 1 be close together, so as shown in figure 31, formed separated material mouth 15.If with the width setup of each separated material mouth is that 4～7mm, length setting are 1～5cm, then softening fried flour will can not discharged from separated material mouth 15 in the separated material mouth.After lid 2 integral body are peeled off, edible fried flour.

Again, the jut 31 that replaces the front end make banded wing flap portion 12 is engaged on the U font crack 9, also it can be engaged in the through hole 33 of the stripping portion 13 that the formation by separated material mouth 15 forms.At this moment, shown in figure 32, can jut 31 be engaged on the through hole 33, perhaps as shown in figure 33, also can be engaged on the through hole 33 from rear side from face side.

Though the present invention is illustrated by the reference accompanying drawing, but be not limited to this, only otherwise change purport of the present invention, can append various changes.

Claims (27)

1, a kind of container for fast food is characterized in that:

Have the vessel and the leak free of the flange part implementation in the top lid of accommodating content; Above-mentioned lid, have Kaifeng with tab portion, be arranged on above-mentioned Kaifeng with the tab portion both sides tearing starting point and since two starting points and stopping to use the hemisection groove to the U font or circular-arc the tearing of the essence of tearing the direction protrusion along tearing the straight line formation that direction extends.

2, container for fast food according to claim 1 is characterized in that, tears starting point, is crack on the peripheral edge portion that is arranged on above-mentioned lid or indentation.

3, container for fast food according to claim 1 and 2 is characterized in that, above-mentioned tearing stops to use the hemisection groove, is positioned at the position at the center that surmounts above-mentioned lid.

4, according to any described container for fast food in the claim 1～3, it is characterized in that, begin from above-mentioned crack also to be provided with Kaifeng hemisection groove along each straight line of tearing the direction extension.

5, container for fast food according to claim 4 is characterized in that, above-mentioned Kaifeng stops with the hemisection groove distance that separates a little being arranged with the front end of hemisection groove with above-mentioned tearing.

According to claim 4 or 5 described container for fast food, it is characterized in that 6, above-mentioned lid is by constituting from the top lamination thin slice that has resin film, paper sheet and heat seal film in turn at least; Above-mentioned tearing stops to arrive at least on the above-mentioned paper sheet in the above-mentioned lamination thin slice with hemisection groove and above-mentioned Kaifeng hemisection groove.

7, container for fast food according to claim 6 is characterized in that, above-mentioned on the above-mentioned paper sheet tears and stop with hemisection groove and the above-mentioned Kaifeng degree of depth with the hemisection groove, is equivalent to about 30% the degree of depth of above-mentioned paper sheet thickness at least.

8, according to claim 6 or 7 described container for fast food, it is characterized in that, above-mentioned stop to tear use the hemisection groove, roughly arrive the bottom surface of above-mentioned paper sheet.

According to any described container for fast food in the claim 1～8, it is characterized in that 9, above-mentioned lid except tab portion is used in above-mentioned Kaifeng, also has the tab portion that forms separated material mouth usefulness; The tab portion of above-mentioned formation separated material mouth usefulness, have pair of straight wire crack and between above-mentioned pair of straight wire crack, be provided with the open end towards the U of a plurality of essence of inboard font crack; Each U font crack is made of with U font that is connected two line parts or circular-arc connecting portion a pair of line part; The front end in above-mentioned linearity crack and above-mentioned U font crack all is positioned at the sealing of above-mentioned lid.

10, container for fast food according to claim 9, it is characterized in that, the easily openable direction of above-mentioned lid is consistent in fact with the line part direction in above-mentioned linearity crack and above-mentioned U font crack, as if pinching the tab portion of above-mentioned formation separated material mouth usefulness and above-mentioned lid being torn from the said vesse body, then above-mentioned lid can be along above-mentioned linearity crack and the extended line separately of the line part in above-mentioned U font crack tear, thereby form a plurality of separated material mouths.

11, according to claim 9 or 10 described container for fast food, it is characterized in that, on the extended line separately of the line part in above-mentioned linearity crack and above-mentioned U font crack, be provided with the hemisection groove that forms separated material mouth usefulness.

According to any described container for fast food in the claim 9～11, it is characterized in that 12, the line part front end in the front end in above-mentioned linearity crack and above-mentioned U font crack is positioned at the outside, Central Line on the sealing of above-mentioned lid.

13, container for fast food according to claim 12, it is characterized in that, the front end in above-mentioned linearity crack and above-mentioned U font crack enters the position in the sealing of above-mentioned lid, from outside in 30～50% the scope of thoughtful above-mentioned sealing width.

According to any described container for fast food in the claim 9～13, it is characterized in that 14, above-mentioned Kaifeng is arranged on the tab portion of tab portion and above-mentioned formation separated material mouth usefulness on the position of opposite face of neighboring; Above-mentioned Kaifeng tab portion, has the jut that constitutes by neck and head, above-mentioned Kaifeng is upwards lifted with tab portion, make above-mentioned cap portion Kaifeng, by making above-mentioned jut be engaged on the through hole of the stripping portion that an above-mentioned U font crack or forms by the separated material interruption-forming Kaifeng that can keep above-mentioned lid.

15, container for fast food according to claim 14, it is characterized in that and above-mentioned U font crack in the structure of above-mentioned jut engaging have the protrusion of a Zhou Fangxiang.

16, according to any described container for fast food in the claim 9～15, it is characterized in that, on above-mentioned lid, be provided with and tear stop flag, pinching the tab portion of above-mentioned formation separated material mouth, above-mentioned lid is being torn to the above-mentioned stop flag of tearing from the said vesse body.

17, a kind of container for fast food, be after injecting hot water with the container for fast food of hot water evacuation, it is characterized in that:

Lid by vessel and end boss sealed in its upper portion constitutes; On the above-mentioned lid roughly on the position of opposite face, be provided with the tab portion of Kaifeng with tab portion and formation separated material mouth usefulness, above-mentioned Kaifeng tab portion, has the jut that constitutes by neck and head, the tab portion of above-mentioned formation separated material mouth usefulness, have the crack of pair of straight wire and in chien shih open end, the crack of above-mentioned pair of straight wire towards inboard and a plurality of essence that be provided with are the crack of U font; Each U font crack is made of with U font that is connected two line parts or circular-arc connecting portion a pair of line part; The front end in above-mentioned linearity crack and above-mentioned U font crack all is positioned at the sealing of above-mentioned lid; Above-mentioned Kaifeng upwards lifted with tab portion make above-mentioned lid form part Kaifeng, be engaged on an above-mentioned U font crack or the through hole Kaifeng that can keep above-mentioned lid by the stripping portion that forms of separated material mouth by making above-mentioned jut.

18, container for fast food according to claim 17, it is characterized in that and above-mentioned U font crack in the structure of above-mentioned jut engaging, have the protrusion of a Zhou Fangxiang.

19, according to claim 17 or 18 described container for fast food, it is characterized in that, the easily openable direction of above-mentioned lid, consistent in fact with the direction of the line part in above-mentioned linearity crack and above-mentioned U font crack, pinching the tab portion of above-mentioned formation separated material mouth usefulness, above-mentioned lid is torn from the said vesse body, then above-mentioned lid can be along above-mentioned linearity crack and the extended line separately of the line part in above-mentioned U font crack tear, thereby form a plurality of separated material mouths.

According to any described container for fast food in the claim 17～19, it is characterized in that 20, the front end in each U font crack is provided with the narrow more bevelled line portion of a pair of its spacing more forward.

According to any described container for fast food in the claim 17～20, it is characterized in that 21, the front end in pair of straight wire crack is provided with the wide more bevelled line portion of a pair of its spacing more forward.

22, according to any described container for fast food in the claim 1～21, it is characterized in that above-mentioned lid is made of the lamination thin slice, described lamination thin slice has resin film, paper sheet, stiffness films and a heat seal film at least from top; At least one of above-mentioned resin film, above-mentioned stiffness films and above-mentioned sealing film has tearing property of straight line.

23, container for fast food according to claim 22, it is characterized in that above-mentioned resin film has quiet retentivity, utilize the quiet retentivity of resin film, above-mentioned tab portion is upwards lifted, and then lid is torn and the wing flap portion that forms can keep the state that in fact upwards lifts.

24, according to claim 22 or 23 described container for fast food, it is characterized in that above-mentioned lid is formed by the lamination thin slice, this lamination thin slice, be bonding and constitute with above-mentioned paper sheet under the state of giving above-mentioned resin film tension force, make above-mentioned lid have crimpiness.

25, according to any described container for fast food in the claim 22～24, it is characterized in that above-mentioned resin film is made of polybutylene terephthalate.

According to any described container for fast food in the claim 22～24, it is characterized in that 26, above-mentioned stiffness films is made of the polybutylene terephthalate film of the different double orientation of one-way orientation or the degree of orientation.

27, a kind of instant food is characterized in that, is accommodated in the claim 1～26 in any described container for fast food.

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