CN202499328U - Food packaging container - Google Patents

Abstract

The utility model provides a food packaging container, comprising a container main body and a flange part, wherein the container main body is formed by drawing a laminated sheet with a first layer as the inner side, the laminated sheet is provided with the first layer and a second layer, the first layer is made of a synthetic resin film, the second layer is in a state of being easily separated from the external surface of the first layer and made of a synthetic resin film or a metal foil, and the flange part is arranged at the peripheral part of the opening of the container main body, wherein the first layer is at least provide with a film layer at the front surface side and a film layer at the rear surface side, and the two film layers are tightly fitted with each other and can be separated from each other freely; and a cut gap is formed along the entire flange part on the film layer at the front surface side of the first layer in order to be jointed with a heat seal material layer of a cover covering the container main body and the flange part at the peripheral part of the opening of the container main body of the flange body or a part adjacent to the peripheral part.

Description

The used for packing foods container

Technical field

The utility model relates to the for example employed easy-open container of packing of dessert, cooked food etc.

Background technology

In the past, as the container of packing dessert and cooked food, known (i) synthetic resin container, (ii) aluminium foil container made and (iii) iron ware.

Summary of the invention

There is following such problem in said so existing container.

(i) synthetic resin container: lack feeling of high class, and the so-called barrier of block light, oxygen, moisture etc. compares with the metallic container and differ significantly, therefore, only can when the food that circulation period is short or difficult rotten food are packed as content, use.

(ii) aluminium foil container made: owing to have feeling of high class and barrier also excellent, thereby be used as the container for packing of dessert and cooked food and be widely used, produce depression because of the impact that falls etc. but intensity is low, easy.

(iii) iron ware: in employed iron wares such as can, barrier and intensity are all excellent, but lack feeling of high class, and are very easy to get rusty, and therefore, be inappropriate for the food that packing contains aerobic or acidic materials etc., and food can't long preservation.

(iv) by aluminium foil and the film formed clad vessel more than 2 layers of synthetic resin: at content is for example under the such situation of liquid such as wine, fruit juice, jam or viscous body; When having inclusion such as water between the heat seal material layer below the film formed ground floor by resin of flange part and lid; There is following problem in this part; That is, the what is called that heating and pressurizing can welding is yet bubbled (blistering), leak tightness significantly reduces even if produce.Also there is following problem: even if when having inclusiones such as water, jam, can seal; Its bonding force also a little less than; Press when uprising in the containers such as heating when therefore sterilize because of autoclave in the sealing back; Can't fully tolerate in this and press, bonding force the most weak junction surface is peeled off because of high interior pressure, and leak tightness is impaired.

(v) form the clad vessel of crooked edge: owing to also can be involved in the middle of the crooked edge, thereby can not be easy to peel off (easy peel) together with first synthetic resin layer of flange part at the flange part of container.So; At present; Have 2 ring-type joint-cuttings (two joint-cutting mouths) at the flange part that is provided with crooked edge around its complete cycle; Through in the middle of two joint-cuttings, utilizing heat-sealing that first synthetic resin layer of flange part is engaged with the heat seal material layer of lid, when Kaifeng, make and between first synthetic resin layer a little less than the middle bind strength of two joint-cuttings and following one deck, peel off thus.But have following problem at present: for the lid heat seal material layer heat welded; And the mode that makes first synthetic resin layer be exposed to outside face forms crooked edge; Thereby if the heat-sealing position of heat seal device to the outside of outside joint-cutting, be that crooked edge lateral deviations such as the rim roll or the shape bending edge that hangs down are when putting; The externally outside of joint-cutting and the first synthetic resin layer thermal welding of crooked edge of the heat seal material layer of lid, container become and are difficult to break a seal.

One of purpose of the utility model is, a kind of used for packing foods container is provided, and it has solved said prior art problems; Barrier is excellent, can the permanently effective preservation of carrying out content, and intensity is high; Also be difficult to produce depression even if therefore be hit, and have feeling of high class, aesthetic appearance excellence, and can cold deep-draw be shaped; Therefore capacity rating excellent, can cheapness be supplied in market, and it is easy and easy-to-use to break a seal.

Another purpose of the utility model is, a kind of used for packing foods container is provided, even if having inclusiones such as water, jam between its heat seal material layer below the film formed ground floor by resin of the flange part of container body and lid; Also can be with this part heating and pressurizing welding, abundant airtight container, even and if the heating when autoclave is sterilized etc. make to press in the airtight container and uprise under such situation; Also can fully tolerate in this and press; Do not diminish leak tightness, and the sealing that can cover reliably, need not bigger power during Kaifeng; Can be easy to peel off, thereby handle easily and very convenient.

Another purpose of the utility model is; A kind of used for packing foods container is provided, and is crooked edge such as the leading section at flange part possesses rim roll, the shape bending edge that hangs down and have feeling of high class and safe used for packing foods container, even if put to crooked edge lateral deviation the heat-sealing position of heat seal device; The also not externally outside of joint-cutting and the first synthetic resin layer thermal welding of heat seal material layer of lid; Therefore, the Kaifeng of container need not bigger power, can break a seal very simply; Can be easy to peel off, can make the Kaifeng property of container stable.

The means of technical solution problem

The utility model to achieve these goals, the utility model is realized through following means.

1. a kind of used for packing foods container; Possess: container body; Its through so that ground floor for inboard mode the lamination sheets drawing and forming is formed, this lamination sheets have by the film formed ground floor of synthetic resin be joined so the second layer state that can separate with the outside face of this ground floor easily, that form by synthetic resin film or metallic paper; And, flange part, it is located at the opening circumference of this container body,

Said ground floor has the rete of peeling off the face side that fits tightly freely each other and the rete of rear side at least; Near the part container body opening circumference of flange part or this circumference; For the heat seal material layer with the lid that covers said container body and flange part engages, on the rete of the face side of said ground floor, be provided with joint-cutting with centering on the flange part complete cycle.

According to the utility model; Said have the rete of peeling off the face side that fits tightly freely each other and the rete of rear side by the film formed ground floor of synthetic resin, near the part container body opening circumference of flange part or this circumference, on by the rete of the face side that is used for engaging of the film formed ground floor of synthetic resin with the heat seal material layer around joint-cutting flange part complete cycle be provided with joint-cutting; Therefore; After heat seal, during peel-off covers, under rete in the middle of the film formed ground floor by synthetic resin and state that the heat seal material layer of lid engages, peel off from another rete easily; Therefore, the used for packing foods container has in the use effect very easily.

2. preferably, ground floor is the not stretching synthetic resin co-extruded films of 200～400 μ m for the thickness that engages with the single face of the said second layer in the above-mentioned utility model, and said second layer thickness is the aluminium foil of 40～150 μ m.

As stated; The used for packing foods easy-open container of the utility model possesses: container body; It is through forming the lamination sheets drawing and forming with the mode of synthetic resin co-extruded films in the inboard that do not stretch, and this lamination sheets is that the aluminium foil of 40～150 μ m and the thickness that engages with the single face of this aluminium foil are that the not stretching synthetic resin co-extruded films of 200～400 μ m forms by thickness; Flange part, it is located at the opening circumference of this container body.Since use aluminium foil, thereby the barrier of container is excellent, can the permanently effective preservation of carrying out contents such as dessert, cooked food.In addition, because laminate aluminium foil has the not stretching synthetic resin film with specific thickness, thereby intensity is very high, therefore, also is difficult to produce depression even if be hit.And owing to use aluminium foil, thereby have feeling of high class, aesthetic appearance excellence.And then, because aluminium foil is with to have a not stretching synthetic resin co-extruded films of specific thickness range upon range of, but thereby drawing and forming; Therefore; Can carry out the manufacturing of container very efficiently, capacity rating is excellent, and; Make when being shaped and can the container cheapness attractive in appearance and then colory of doing manual work be supplied the distortion that can not produce jog etc. at flange part fully in market because of aluminium foil has thickness sufficient.

3. preferably, the rete of the face side of said ground floor is peeled off freely each other via knitting layer with the rete of rear side and is engaged in the above-mentioned utility model.

According to the utility model, engage because the rete of the face side of ground floor is peeled off freely via knitting layer with the rete of rear side each other, thereby rete engages the leak tightness raising securely with the rete of rear side.

4. in the above-mentioned utility model preferably; Also possesses following such lid; Its covering container main body and flange part and lower surface have the heat seal material layer; And a side of circumference is connected with Kaifeng and uses the grip part outside, and near the part container body opening circumference of flange part or this circumference is provided with the ring-type joint-cutting the roughly complete cycle of flange part in said ground floor upper edge; In the outside of ring-type joint-cutting, the said ground floor and the heat seal material layer of lid of flange part be provided with more weak bonding force relatively engages form and have grid striated junction surface the wide cut ring-type first seal oral area; Between the junction surface of grid striated, form cancellous inclusion entering and use space part; Press in the airtight container that heating causes when the inboard of the first heat-sealing oral area of this ring-type forms tolerance and sterilize because of autoclave increase, engage the ring-type in a narrow margin that forms with moderate relatively bonding force second seal oral area; Form the 3rd heat-sealing oral area that forms with stronger relatively bonding force joint in Kaifeng with the flange part side end of grip part.

In the above-mentioned utility model, in the outside of the joint-cutting of flange part, at the heat seal material layer by film formed ground floor of synthetic resin and lid of flange part, through adopting with relatively low for example not enough 50kgf/cm ²The sealing of sealing load and sealing head use heating surface as 1 heat seal device of grid striated (embossing shape) carry out so-called Presed flower enclosed, form the first heat-sealing oral area that engages the wide cut ring-type that forms with more weak relatively bonding force with grid striated junction surface.

So Presed flower enclosed through implementing; Flange part be heated the pressurization welding by the heat seal material layer of the film formed ground floor of resin and lid lower surface with the mode at the junction surface that forms the grid striated; At this moment; When inclusiones such as existing water, jam existed between the film formed ground floor by resin of flange part and heat seal material layer, this inclusion got in the areola portion between the junction surface of grid striated, therefore can container fully be sealed.

Then, the wide cut ring-type with this grid striated junction surface first the heat-sealing oral area inside, green phase is to moderate for example 50～100kgf/cm ²Sealing load carry out the heating and pressurizing welding, thereby form the second heat-sealing oral area that engages the ring-type in a narrow margin that forms with moderate relatively bonding force.

It is thus clear that; Through forming the second heat-sealing oral area that engages the ring-type in a narrow margin that forms by the moderate bonding force stronger than the bonding force of the first heat-sealing oral area; Even if for example heating when sterilizing because of autoclave etc. makes to press in the airtight container and uprises under such situation; Also can fully tolerate in this and press, not damage leak tightness.

And then, overlooking of outer peripheral edges portion one side of being located at lid, at the heat seal material layer by film formed ground floor of resin and lid of flange part, through with the higher relatively 100kgf/cm that for example surpasses to Kaifeng of general triangular flange part side end with the grip part ²And less than 150kgf/cm ²Sealing load carry out the heating and pressurizing welding, engage the 3rd roughly circular-arc heat-sealing oral area that forms thereby form with stronger relatively bonding force.

Engage the 3rd roughly circular-arc heat-sealing oral area that forms through forming by strong like this bonding force, this part flange portion by the heat seal material layer of the film formed ground floor of resin and lid combine become firm, the Kaifeng that can cover reliably.At this moment, therefore being stripped from being joined so between the second layer state that is prone to separate with the outside face of this ground floor, that formed by synthetic resin film or metallic paper by the film formed ground floor of resin of flange part side, need not bigger power during Kaifeng, can be easy to peel off.

In addition, the second heat-sealing oral area of said ring-type in a narrow margin engages with moderate relatively bonding force and forms, with respect to this; The 3rd roughly circular-arc heat-sealing oral area engages with stronger relatively bonding force; This be because, if the bonding force of the second heat-sealing oral area is too high, then because the heating and pressurizing welding makes that the second layer of ground floor, its downside of flange part not only also can be influenced and thermal deformation; Between the ground floor of flange part and the second layer, peel off and when breaking a seal will covering as previously mentioned; Partly become peel resistance and power that must be bigger at this second heat-sealing oral area thermal deformation, and be difficult for Kaifeng, so not preferred.

Here; In Kaifeng with the flange part side end of grip part form the 3rd seal oral area method under following two situation, be different: situation (i); Use is not just established the lid of Kaifeng with the circle of grip part from initial, and after heat seal, uses the grip part through stamping-out formation Kaifeng; And, situation (ii), a side of using circumference outside is from initially just being provided with the lid of the Kaifeng of general triangular with the grip part.

At first, just do not establish under the situation of Kaifeng with the lid of the circle of grip part from initial in the use of (i), circular lid has the external diameter bigger than the external diameter of flange part.Flange part with the lid covering container main body of this circle; The outside at the joint-cutting of flange part; Form the said first heat-sealing oral area with the wide cut ring-type at grid striated junction surface; Then, form the second heat-sealing oral area of said ring-type in a narrow margin in the inside that first of this ring-type seals oral area, and seal the 3rd heat-sealing oral area of the outer peripheral edges portion formation ring-type of oral area along first of ring-type.Then in the end, the inner peripheral that seals oral area along the 3rd of this ring-type will cover and the flange part stamping-out, make and use the grip part in the Kaifeng of the residual a part of general triangular of covering of a side.

Next; (ii) use outside a side of circumference from initially just being provided with under the situation of Kaifeng with the lid of grip part of general triangular; This is with the flange part of the lid covering container main body of grip part; In the outside of the joint-cutting of flange part, form the said first heat-sealing oral area, then with the wide cut ring-type at grid striated junction surface; Form the second heat-sealing oral area of ring-type in a narrow margin in the inside that first of this ring-type seals oral area, form the 3rd roughly circular-arc heat-sealing oral area with the flange part side end of grip part in Kaifeng.

In addition, under said (i) and situation (ii), the 3rd heat-sealing oral area can form when using 2 heat seal devices to form the second heat-sealing oral area together.

That is, under the situation of said (i) method, use protuberance towards lower seal,, use protuberance towards lower seal what the outer peripheral edges portion of sealing head was provided with its high ring-type of aspect ratio with respect to this what the inner peripheral portion of the sealing head of 2 heat seal devices was provided with highly lower ring-type.Here, inside and outside two sealings are about 0.1～0.5mm with the diff-H (1) of protuberance.

With respect to this, under the said situation (ii), with the height of the outer peripheral edges portion of sealing head higher process consistent with the shape with the flange part side end of grip part of breaking a seal roughly circular-arc with the shape of protuberance towards lower seal.And; Through use such possessing have 2 sealings with 2 heat seal devices of the sealing head of protuberance, in the inside of the first heat seal material layer with the heat seal material layer of the ground floor of flange part and lid pressurized, heated once more; Thereby the sealing with the lower ring-type of inside height forms the second heat-sealing oral area of ring-type in a narrow margin with the corresponding position of protuberance; Simultaneously, engaging the three heat-sealing oral area that form with the corresponding position of protuberance through forming than its stronger sealing load with the higher sealing of outside height with relative stronger bonding force.

In addition, said first, second can certainly use to possess with the 3rd heat-sealing oral area to have and the corresponding sealing of these heat-sealing oral areas 1 time, 2 times and 3 heat seal devices with each sealing head of protuberance, forms successively.

5. preferably, also possess following such lid in the above-mentioned utility model, its covering container main body and flange part and have the heat seal material layer at lower surface, and a side of circumference is connected with to break a seal and uses the grip part outside,

Leading section at the flange part of container body is provided with crooked edge; Near part near the crooked edge of the partial sum container body opening circumference of flange part or this circumference, on said ground floor respectively flange part roughly the complete cycle scope be provided with first joint-cutting and second joint-cutting; In the middle of said two joint-cuttings, the said ground floor and the heat seal material layer of lid of flange part be provided with more weak bonding force relatively engages form and have grid striated junction surface the wide cut ring-type first seal oral area; Between the junction surface of grid striated, form cancellous inclusion entering and use space part; In the inboard of the first heat-sealing oral area of this ring-type, press in the airtight container that heating causes when forming tolerance and sterilize because of autoclave increase, engage the ring-type in a narrow margin that forms with moderate relatively bonding force second seal oral area; Be formed with the 3rd heat-sealing oral area that forms with stronger relatively bonding force joint in Kaifeng with the flange part side end of grip part.

On the other hand, under the situation of said utility model, the safety in order to realize using is also given feeling of high class and is improved intensity container, is provided with crooked edge (rim roll or the shape bending edge that hangs down) at the leading section of flange part.And; Near part near the crooked edge of the partial sum container body opening circumference of flange part or this circumference; In the centre of being located at first joint-cutting and second joint-cutting of ground floor along complete cycle scope roughly; As the countermeasure of tackling inclusiones such as water, form the first heat-sealing oral area that engages and have the wide cut ring-type at grid striated junction surface with more weak relatively bonding force, seal the inside of oral area in first of this ring-type; Heating etc. makes the increase of pressing in the airtight container when sterilizing because of autoclave in order to tolerate; Formation engages the second heat-sealing oral area of the ring-type in a narrow margin that forms with moderate relatively bonding force, and in order to ensure the Kaifeng property of lid, forms with the flange part side end of grip part in Kaifeng to engage the roughly circular-arc the 3rd of the weak point that forms with stronger relatively bonding force and seal oral area.

In addition, under the situation of the container for packing with this bending edge, the 3rd heat-sealing oral area forms through said method (ii).

In addition, in said utility model, the outside face at the aluminium foil of container body is provided with the protecting hood cover layer via bond layer usually, between aluminium foil and protecting hood cover layer, printed layers is set as required.

Here, printed layers uses the China ink of the system of polyvinyl chloride acetate for example, nitrocellulose prime system and polyurethane series etc. to implement.

In addition, the protecting hood cover layer is used for protecting aluminium foil, and it can form through the solution of the synthetic resin that applies chemical proofing, have excellent weather resistance, perhaps also can form through the layer that engages identical synthetic resin.The thickness of the protecting hood cover layer that these resins form is preferably 1～50 μ m.The thickness of protecting hood cover layer certainly also can be greater than 50 μ m.

6. preferably, also the flange part at container body is provided with crooked edge in the above-mentioned utility model; Near part near the crooked edge of the partial sum container body opening circumference of flange part or the opening circumference, for the heat seal material layer heat welded of lid inside and outside roughly being provided with around flange part respectively on the rete of face side complete cycle a pair of joint-cutting; The centre portion of joint-cutting and crooked edge externally, arbitrary side's surface is provided with thermal welding and prevents layer in the heat seal material layer of the rete of the face side of flange part and lid; Container body the bonding force of rete and the rete of metallic paper or rear side of inboard face side less than the bonding force based on heat welded of the heat seal material layer of the rete of the face side of two joint-cuttings centre and lid.

Be provided with crooked edge or crooked edge such as the shape bending edge that hangs down at the flange part of container body.Rim roll can be in order be the outside with the heat seal material layer heat welded of lid with the rete (being also referred to as first synthetic resin layer) of the face side of flange part and just to roll up the rim roll of (curl) with the protecting hood cover layer for the curling what is called that forms medially; Otherwise, also can be that to make first synthetic resin layer be the curl rim roll of the so-called warp that forms of ground, the outside for inboard and protecting hood cover layer.In addition, the shape bending edge that hangs down can certainly be to make horizontal part L shaped towards the cross-sectional plane of inboard.

And, near part near the partial sum rim roll container body opening circumference of flange part or the opening circumference, in first synthetic resin layer respectively around the roughly complete cycle of flange part be provided with 2 joint-cuttings that the cross section is roughly V-arrangement or U-shaped.

In addition, joint-cutting for example gets final product through utilizing hot part to remove ground floor or pass through to form under the cutter partial cut.

In the utility model, at the outside joint-cutting of container body flange part and the centre portion of crooked edge, the surface of any one is provided with thermal welding and prevents layer in the heat seal material layer of first synthetic resin layer of flange part and lid.

Here; As constituting the material that thermal welding prevents layer; Can use for example amilan, alkide resin, polyamide-nitrocotton copolymer, organic siliconresin-nitrocotton copolymer, organic siliconresin, urethane resin, amino-alkyd resin, wax etc., its thickness is preferably about 1～5mm.This thermal welding prevents that the formation of layer from can wait through coating, attaching and carry out.

In addition, thermal welding prevents that layer also is arranged at the surface of the heat seal material layer that covers side sometimes.

According to the utility model; For the leading section at flange part possess rim roll, crooked edge such as the shape bending edge that hangs down; Have feeling of high class and safe used for packing foods container; Even if put to the rim roll lateral deviation heat-sealing position of heat seal device, also can stop the externally outside heat seal material layer and the first synthetic resin layer thermal welding of joint-cutting reliably.

And; When in the used for packing foods container, packing the state of for example dessert, food for cooking and cooked food; When Kaifeng of the circumference that grips lid one side with the grip part during to the top pull-up; Under the engaged state of heat-sealed part, can peel off easily, be easy to peel off between synthetic resin layer and the aluminium foil or between first synthetic resin layer and second synthetic resin layer.Therefore, the Kaifeng of container can be carried out very simply and need not bigger power, can make the Kaifeng property of container stable.

In addition, the outside face in the metallic paper that constitutes lamination sheets is provided with synthetic resin system protecting hood cover layer.This protecting hood cover layer is used for protecting metallic paper, can form or also can form through the rete that engages identical synthetic resin through the solution of the synthetic resin that metallic paper applied chemical proofing, have excellent weather resistance.

The thickness of the protecting hood cover layer of these resins is preferably 1～50 μ m.

Here, film by the system of epoxy for example, acrylic ester is filmed or the situation of the coat film that the nitrocellulose prime system is filmed to be formed under, be preferably 1～3g/m ²Coating weight.In addition, under the situation of the film that is formed by polyphenyl dioctyl phthalate glycol ester, preferred thickness is 12～16 μ m; Under the situation of the film that forms by un-stretched polypropylene; Preferred thickness is 20～50 μ m, and under the situation of the film that is formed by nylon, preferred thickness is 15～20 μ m.

In addition, as with the tectal lining cement of single face splice protection of metallic paper, can enumerate for example common polyurethane series, polyester is a lining cement etc., these lining cements can use the lining cement of suitable kind according to the kind of adherend.

In addition, in order to improve the bind strength of metallic paper and protecting hood cover layer, the single face setting that preferably is implemented in metallic paper contains the processing that zirconium compounds or chromaking contain the synthetic resin basalis of thing.In addition, between metallic paper and protecting hood cover layer, printed layers is set usually.Here, printed layers uses the China ink of polyvinyl chloride acetate system, nitrocellulose prime system and polyurethane series etc. to implement.

7. preferably, it is poor that part is formed with layer near the opening circumference of said container body in the above-mentioned utility model.

Thus, because it is poor near the opening circumference of container body, partly to be formed with layer, so stacked container can not fit tightly each other when stacking food container.

8. in the above-mentioned utility model preferably, on the flange part of said used for packing foods container the cardinal extremity of grip part of bonding lid be bonded on the flange part of said food container.

Like this; Since the cardinal extremity of grip part of bonding lid be bonded on the flange part of food container; So can be, and do not worry food decay fully owing to envelope near bonding bad the causing the grip part to the food container of market supply good airproof performance.

9. in the above-mentioned utility model preferably, on the flange part of used for packing foods container the periphery of bonding lid on the flange part that in whole scope, is bonded in food container and seal.

Like this, owing to the periphery of bonding lid in whole scope, be bonded on the flange part of food container and seal, so can be to the food container of market supply good airproof performance.

10. preferably, the periphery that is bonded in the lid on the flange part of food container is excised except that the grip part in the above-mentioned utility model, and adhesive portion is exposed on the junction surface end face of lid and food container.

Like this, excised except that the grip part owing to be bonded in the periphery of the lid on the flange part of food container, adhesive portion is exposed on the junction surface end face of lid and food container; Thus; The grip part easy identification, and, can prevent to look to hang down and hinder Kaifeng from flange part owing to the periphery of lid; Whether the periphery of also not worrying the staff tegmentum scratches, can also seal good by Visual Confirmation.

In

above-mentioned utility model preferably; Said is the multi-layer synthetic resin rete of lit-par-lit structure of second rete with first rete and rear side of the face side that is made up of high density polyethylene (HDPE) (HDPE) by the film formed ground floor of synthetic resin; Wherein, second rete is made up of bind strength key-course and the polypropylene (PP) that polypropylene (PP) constitutes, perhaps is made up of polypropylene (PP) and poly-vinyl (PE).

Thus, during Kaifeng, be located at the grip part that covers and take off when covering when gripping; Under the state that the heat-sealable material layer of first rete of multi-layer synthetic resin rete and lid engages; Peel off between first rete of multi-layer synthetic resin rete and second rete, thereby peel off easily, can break a seal easily.

Preferably, the lower end that is formed on the joint-cutting on the multi-layer synthetic resin rete connects first rete in

above-mentioned utility model.

Like this; Because being formed on the lower end of the joint-cutting on the multi-layer synthetic resin rete connects first rete; So; Can break a seal easily, and, do not worry that fully joint-cutting arrives aluminium foil and makes that aluminium foil is caused durability to worsen by the corrosion of the content of container and the intensity of flange part reduces this problem.

In

above-mentioned utility model preferably; The bottom of joint-cutting connects first rete, and the bind strength key-course exposes.

Same as described above, can break a seal easily, and, do not worry that fully joint-cutting arrives aluminium foil and makes that aluminium foil is caused durability to worsen by the corrosion of the content of container and the intensity of flange part reduces this problem.

Description of drawings

Fig. 1 is the local amplification view of lamination sheets that constitutes the container of the utility model.

Fig. 2 is the summary cutaway view of the utility model article.

Fig. 3 is the main portion amplification view that the container of Fig. 2 is applied with the state of lid.

Fig. 4 is the block diagram that this container is applied with the state of lid.

Fig. 5 is the part amplification view of composite sheet of formation container of the variation of the 1st embodiment.

Fig. 6 is the part amplification view of composite sheet of formation container of the variation of the 1st embodiment.

Fig. 7 is the main portion amplification view of the container of the 2nd embodiment.

Fig. 8 is the main portion amplification view, and expression is formed with the state of the first heat seal layer.

Fig. 9 is the main portion amplification view of Fig. 8.

Figure 10 is the main portion amplification view, and expression is formed with the state of the second and the 3rd heat seal layer.

Figure 11 is the V-V cutaway view of Figure 10.

Figure 12 is the summary block diagram of the container of the utility model.

Figure 13 is the main portion amplification view of container of the utility model of the 3rd embodiment.

Figure 14 is the main portion amplification view of container of the utility model of the 4th embodiment.

Figure 15 is the main portion amplification view of container of the utility model of the 5th embodiment.

Figure 16 is the main portion amplification view that the used for packing foods container that has the warp rim roll of expression the 3rd embodiment is represented the heat seal state.

Figure 17 be close the lid and heat seal the biopsy cavity marker devices summary block diagram of used for packing foods container.

The explanation of Reference numeral

1... lamination sheets; 2... aluminium foil; The synthetic resin co-extruded films 3... do not stretch; 3a... first rete; 3b... second rete; 4; 5; 8... bond layer; 6... printed layers; 7... protecting hood cover layer; 10... used for packing foods container; 11... container body; 12... flange part; 13... lid; 14... heat seal material layer; 21... container body; 22... lid; 23... flange part; 24... ground floor; 25... the second layer; 26... heat seal material layer; 210... space part; 211; 212... joint-cutting; 213... crooked edge (rim roll); 214... the grip part is used in Kaifeng; 215... crooked edge (shape bending edge hangs down); 221; 222...1 inferior and 2 heat seal devices; 223... annular seal is used protuberance; 224... protuberance is used in sealing; A... first seal oral area; B... second seal oral area; C... the 3rd seal oral area; 31... lamination sheets; 32... aluminium foil; 33... synthetic resin layer; 33a... first synthetic resin layer; 33b... second synthetic resin layer; 34... bond layer; 37... protecting hood cover layer; 310... used for packing foods container; 311... container body; 312... flange part; 313... rim roll (crooked edge); 315; 316... joint-cutting; 321... lid; 322... heat seal material layer; 323... the grip part is used in Kaifeng; 325... heating pressing component.

The specific embodiment

Next, the embodiment of the utility model is described based on Figure of description.

First embodiment

First embodiment of utility model at first, is described based on Fig. 1～Fig. 4.

In the accompanying drawing; The used for packing foods easy-open container 10 of the utility model; Through will being that the aluminium foil 2 of 40～150 μ m is the lamination sheets shown in Figure 11 that the synthetic resin co-extruded films 3 that do not stretch of 200～400 μ m forms with clipping thickness that bond layer 4 is engaged in aluminium foil 2 single faces by thickness; Make the synthetic resin co-extruded films 3 that do not stretch for carrying out drawing and forming medially, thereby be the container that forms by container body 11 and the flange part 12 of being located at the opening circumference of this container body of formation as shown in Figure 2.

The lamination sheets 1 that constitutes container body is formed by the aluminium foil 2 and the synthetic resin co-extruded films 3 that do not stretch under the situation of the 1st embodiment, but also can possess by the film formed ground floor of synthetic resin be joined so the second layer easy state that separates with the outside face of this ground floor, that form by synthetic resin film or metallic paper.

Such lamination sheets 1 normally is provided with the film formed synthetic resin layer of synthetic resin by 1 layer or 2 layers at the single face of metallic paper, especially aluminium foil.Certainly, as lamination sheets, also can use do not have metallic paper, film formed synthetic-resin laminated by the synthetic resin more than 2 layers.

As the metallic paper of the lamination sheets that constitutes container body, use aluminium foil usually.Under the situation of the 1st embodiment, the thickness of aluminium foil is 40～150 μ m.Here, if the thickness less than 40 μ m of aluminium foil 2 then form jog at flange part 12 when forming container 10, can't prevent the distortion of flange part 12.In addition, if the thickness of aluminium foil 2 surpasses 150 μ m, then the use quantitative change of aluminum is many, economic aspect is unfavorable.In addition, the pull and stretch of container than, be that the degree of depth/bore (H/W) (with reference to Fig. 2) is 40% when above, in order not produce fold at flange part 12 during the autoclave sterilization after boiling sterilization after shaping or the packaging for foodstuff, expect that the thickness of aluminium foil is 80～150 μ m.In addition, as metallic paper, can use Copper Foil etc. in addition.

In addition, when using aluminium foil, it has pulling strengrth is 9.0～25.0kgf/mm ², endurance is 2.5～9.5kgf/mm ²With percentage elongation be 10～40%, the intensity of Dent resistance and resistance against compression etc. is big, and aluminium foil to have the fold rate be below 7%, the generation of fold in the time of can preventing drawing and forming.

The synthetic resin layer of being located at the aluminium foil single face uses the synthetic resin co-extruded films 3 that do not stretch in the 1st embodiment; But can also be by for example polyolefin such as polypropylene, poly-vinyl; Or polyester, polyvinylchloride, polycarbonate and polystyrene, these copolymer or the synthetic resin formation that also these resins is obtained with required mixed, synthetic resin layer can be formed by the synthetic resin more than 1 layer or 2 layers.

The thickness of said synthetic resin layer is as being 100～500 μ m all, being preferably 200～400 μ m.In addition, when drawing and forming,, preferably make synthetic resin layer thicker than aluminium foil for not at the local fold that produces of the flange part of container.

Here, as synthetic resin layer, for example use the film of (I)～(III) as follows.

(I) independent synthetic resin film

(II) the synthetic resin co-extruded films that do not stretch

(III) can engage 2 kinds of thermoplastic synthetic resin films that form each other via knitting layer with peeling off

Here; When use has by the lamination sheets of (I) independent film formed synthetic resin layer of synthetic resin; With the metallic paper of lamination sheets and synthetic resin layer via being the knitting layer that forms of lining cement and being bonded with each other for example by polyethers with easy fissility, thereby give easy fissility to the used for packing foods container.

As knitting layer; In addition can be through being the single face of the bond layer that forms of common bond layer such as lining cement or monoolefine copolymers of unsaturated carboxylic acids resin or its slaine at polyurethane series, polyester, for example applying, silicone resin is that the such coat with easy fissility of coating constitutes.

And under said arbitrary situation, the metallic paper of lamination sheets and the peel strength of synthetic resin layer are that 500～1500g/15mm is wide, to be preferably 700～900g/15mm wide.That is, this peel strength makes the bonding force of metallic paper and synthetic resin layer less than the bonding force of the heat seal material layer heat welded of synthetic resin layer and lid.

In addition; As said (II) the synthetic resin co-extruded films that do not stretch; Be the for example combination of synthetic resin such as polypropylene, poly-vinyl, polyester, polyvinylchloride, polycarbonate, use the not stretching co-extruded films that form such as for example polypropylene and high density polyethylene (HDPE) 2 layers.At this moment, both peel strengths are that 500～1500g/15mm is wide, to be preferably 700～900g/15mm wide, and it is littler than the bonding force of the heat seal material layer heat welded of middle first synthetic resin layer of two joint-cuttings and lid to remain the double-ply bonding force.Certainly, the synthetic resin co-extruded films that do not stretch can be the combination of other synthetic resin, is film more than 2 layers.

Here, (II) do not stretch the synthetic resin co-extruded films owing to do not stretch, thereby directivity is few; Thereby formability is good; And when drawing and forming, fully follow metallic paper with plastic deformation, thus can cold drawn Deep forming, therefore; Have following advantage: can carry out the manufacturing of the darker used for packing foods container of the degree of depth very effectively, capacity rating is excellent.

And then; As constituting said (III) 2 kinds of thermoplastic synthetic resin films can engage the face side of the synthetic resin layer that forms each other with peeling off via knitting layer the thermoplastic synthetic resin film of the second layer of ground floor and rear side, the synthetic resin film that use is formed by the combination of for example polypropylene, poly-vinyl, nylon, polyvinylchloride, polycarbonate etc., for example polypropylene and high density polyethylene (HDPE) etc.Certainly, thermoplastic synthetic resin film can be the combination of other resin.

In addition, as the knitting layer that can the ground floor of the face side of synthetic resin layer and the second layer of rear side be engaged with peeling off each other, same with the situation of said (I), for example using the polyethers with easy fissility is lining cement.In addition; Such knitting layer can be that polyurethane series, polyester are common bond layers such as lining cement, or for example applies at the single face of monoolefine-copolymers of unsaturated carboxylic acids resin or its slaine that silicone resin is that the such coat with easy fissility of coating constitutes.

Among the 1st embodiment,, use the co-extruded films that forms by for example polypropylene, poly-vinyl, polyester, polyvinylchloride, polycarbonate, for example polypropylene and high density polyethylene (HDPE) 2 layers etc. as the synthetic resin co-extruded films 3 that do not stretch.In more detail; Use has the rete 3a of the face side that is formed by high density polyethylene (HDPE) and the multi-layer synthetic resin rete of the stepped construction of the rete 3b of the rear side that forms as follows; This rete 3b is formed by polypropylene and bind strength key-course, and this bind strength key-course is formed by polypropylene or formed by polypropylene and poly-vinyl.At this moment, the double-ply peel strength preferably 500～1500g/15mm wide about, be preferably 700～900g/15mm wide about.Certainly co-extruded films can be the combination of other resin, is the film more than 2 layers.

In addition, the do not stretch lower end of the joint-cutting that forms in the synthetic resin co-extruded films 3 (multi-layer synthetic resin rete) of expectation connects rete 3a.In addition, can be that the bottom of joint-cutting connects rete 3a and exposes the bind strength key-course.

The thickness of synthetic resin co-extruded films 3 of not stretching is 200～400 μ m, be preferably 250～350 μ m.Here, during the thickness less than 200 μ m of co-extruded films 3, can't expect the nerve that this film 3 is had, so-called poor rigidity can not get full intensity, and the completion shape after being shaped is bad.In addition, when thickness surpassed 400 μ m, so-called elastic afterworking was big, can't cold shaping, the production rate variance of container.

In addition; As the lining cement that constitutes said bond layer 4,5; For example can enumerate polyurethane series, polyester is that lining cement, maleation polypropylene and ionomer are monoolefine-copolymers of unsaturated carboxylic acids resin or its slaine (for example with reference to the special public clear 61-54587 communique of Japan) etc., uses the lining cement of suitable kind according to the kind of adherends such as synthetic resin co-extruded films 3, printed layers 6.

In order to form bond layer 4, following 3 methods are for example arranged.

1. be coated with lining cement is dissolved in the adhesive solution that appropriate solvent obtains.At this moment, the coating weight of lining cement is preferably 3～5g/m usually ²About.

2. at aluminium foil 2 and do not stretch between the synthetic resin co-extruded films 3, continuously flow into the lining cement of fusion, process sandwich shape.

3. sandwich the film of the lining cement of making in advance, for example be heated to about 200 ℃ and engage through hot pressing.

Under the 2. said and situation 3., the coating thickness of lining cement is 5～50 μ m, be preferably 10～20 μ m.

In addition, bond layer 5 also can fully likewise form with said.

Here, monoolefine-copolymers of unsaturated carboxylic acids resin or its slaine as said lining cement is following such material.

At first; Monoolefine-copolymers of unsaturated carboxylic acids resin is with ethene, propylene, 1-butylene, isobutylene, 4-methyl-1-pentene, 1-hexene, the such α-monoolefine of 1-heptene; And the such α of acrylic acid, methyl acrylic acid, ethylacrylic acid, crotonic acid, the resin that the beta-unsaturated carboxylic acid copolymerization obtains are substrate; As its typical example, can enumerate ethylene-acrylic acid copolymer resin, ethylene-methacrylic acid copolymer resin.The mol wt of such copolymer resin is 1000～200000, and unsaturated carboxylic acid content is 1～30 weight %, is preferably 2～20 weight % in the copolymer resin.In addition; As the example of the slaine of monoolefine-copolymers of unsaturated carboxylic acids resin, can enumerate ionomer resin that alkali metal ion that the carboxyl of said copolymer resin and sodium, potassium is such or zinc, the such alkaline-earth metal ion neutralization of magnesium obtain, be ionomer resin.The degree of neutralization of metallic ion for example is 0.5～40%.Especially the preferred ionomer resin that uses the zinc salt by the ethylene-methacrylic acid copolymer resin to form.The carboxylic acid content of ionomer resin is 5～18%, and the ionization degree is number %～90%.

In addition, can contain following such mineral compound in said monoolefine-copolymers of unsaturated carboxylic acids resin or its slaine.

Here,, oxide, hydroxide, carbonate and sulfate or talcum, clay, feldspar powder, mica, barytes of for example magnesium, calcium, aluminium, titanium and silicon etc. be can enumerate, carbonate, talcum especially preferably used as mineral compound.The mean grain size of mineral compound is 0.1～50 μ m, be preferably 0.5～30 μ m.When in said copolymer resin or its slaine, containing mineral compound,, mix mineral compound and be below 30 weight portions, mix 0.1～10 weight portion usually, preferably mix 1～5 weight portion with respect to the said copolymer resin of 100 weight portions or its slaine.

Among this embodiment, as shown in Figure 1, via bond layer 5 printed layers 6 is set at the outside face of aluminium foil 2, and then is provided with protecting hood cover layer 7 in the outside of printed layers 6.

Printed layers 6 is as required and is provided with, and it for example uses the China ink of polyvinyl chloride acetate system, nitrocellulose prime system and polyurethane series etc. to implement.In addition, printed layers 6 can according to circumstances be arranged between aluminium foil 2 and the bond layer 5.

Outermost protecting hood cover layer 7 is used for protecting aluminium foil 2; Wherein can use excellent synthetic resin such as chemical proofing, weather resisting property to apply or film; For example filming by epoxy system or the nitrocellulose prime system is filmed under the situation of the coat film that forms, be preferably 1～3g/m ²Coating weight.In addition, under the situation of the film that is formed by polyphenyl dioctyl phthalate glycol ester, thickness is preferably 12～16 μ m; Under the situation of the film that forms by un-stretched polypropylene; Thickness is preferably 20～50 μ m, and under the situation of the film that is formed by nylon, thickness is preferably 15～20 μ m.

Fig. 3 and Fig. 4 represent to use the container 10 of said the utility model to pack the state of dessert and cooked food.In container 10, include content (diagram slightly) in afterwards, cover the lid 13 that lower surface has heat seal material layer 14 and carry out heat seal.In addition, the side at lid 13 circumference is provided with Kaifeng with grip part 15.

And this moment, as shown in Figure 3, near the part container body opening circumference of the flange part 12 of container 10, the rete 3a in the face side that should engage with heat seal material layer 14 of the co-extruded films 3 that do not stretch is provided with joint-cutting 16 with centering on flange part 12 complete cycles.This is under the situation of co-extruded films 3; Owing to fitting tightly the state that becomes to be prone to disengaging with the wide bind strength of about 800g/15mm between 2 rete 3a, the 3b; Thereby cover Kaifeng of 13 with grip part 15 during when gripping to the top pull-up, such shown in long and two-short dash line among Fig. 3, at one rete 3a in the middle of the co-extruded films 3 under the state that the heat seal material layer 14 with lid 13 engages; Peel off from another rete 3b easily, can be easy to peel off.

In addition, shown in the variation of Fig. 5, the rete 3a of the face side of the said co-extruded films 3 that do not stretch can peel off freely each other via knitting layer 8 with the rete 3b of rear side and engage.Ground floor 3a as with synthetic-resin laminated 3 face side peels off the knitting layer 8 that engages freely each other with the second layer 3b of rear side; The polyethers that has easy fissility like use is lining cement (trade name AD-ROCK (ア De ロ Star Network) 083-1101, ROCK PAINT CO., LTD. (ロ Star Network ペ イ Application ト Co., Ltd.) system).At this moment, the peel strength of two- layer 3a, 3b be 500～1500g/15mm wide about, be preferably 700～900g/15mm wide about.

Shown in the variation of Fig. 6; Ground floor 3a as with synthetic-resin laminated 3 the face side that is formed by thermoplastic synthetic resin film peels off the knitting layer 8 that engages freely each other with the second layer 3b of rear side, can be through being that the coat 8b with easy fissility of single face embodiment as silicone resin is coating (trade name SD-7226, Toray Silicone Co., Ltd. system) of common bond layer 8a such as lining cement constitutes to polyurethane series, polyester.

In addition, among the said embodiment, the shape of cross section of being located at the joint-cutting 16 of ground floor 3a is arbitrarily, is not limited to graphic shape.In addition, graphic container is that partly flange part 12 roughly is provided with joint-cutting 16 complete cycle in ground floor 3a upper edge near the container body opening circumference of flange part 12, but such joint-cutting 16 also can be located at the container body opening circumference of flange part 12 itself.

Next, the Test Example of the used for packing foods container drawing and forming of the utility model is described.

Test Example

Preparation is the not stretching synthetic resin co-extruded films 3 formed multiple lamination sheets 1 of 300 μ m by aluminium foil that has changed all thickness 2 and the thickness that is engaged in the aluminium foil single face; Make the pull and stretch of container body 11 compare, be that the degree of depth/bore (H/W) is more than 40%; Lamination sheets 1 is carried out pull and stretch processing, thereby make the various used for packing foods containers of the utility model.And for these used for packing foods container, whether the flange part 12 of container body 11 produces the fold of ripple state and tests during to the sterilization of the boiling sterilization after shaping or the autoclave after the packaging for foodstuff.

Here, the boiling sterilization after the shaping carried out under 85 ℃ 15 minutes.The autoclave sterilization of in container body 11, filling after the food such as pudding in addition, is under 120 ℃, to carry out 30 minutes.

The gained result is shown in following table.

Can know from last table; Is when more than 40% lamination sheets 1 being carried out drawing and forming at the pull and stretch of container body 11 than (H/W); If the thickness of aluminium foil 2 is more than the 80 μ m; Then under arbitrary situation of boiling sterilization after container body 11 firm drawings, after being shaped or the sterilization of the autoclave after the packaging for foodstuff, in flange part 12, all do not produce undulatory fold.

In addition; The pull and stretch through making container body 11 than (H/W) thus be below 40%, when lamination sheets 1 is carried out pull and stretch processing slightly and made the various used for packing foods container of the utility model; Even if the thickness of aluminium foil 2 is even that 40 μ m below the 80 μ m also are sufficient; Fully can be in distortion such as flange part 12 generation jogs when drawing and forming, it is attractive in appearance to do manual work.

Second embodiment

Next, second embodiment of the utility model is described based on Fig. 7～Figure 15.

In Fig. 7～Figure 12 of expression the 2nd embodiment; The used for packing foods easy-open container of the utility model has: the container body 21 that has flange part 23 at the opening circumference; And covering container main body 21 has the lid 22 of heat seal material layer 25 with flange part 23 and at lower surface.

Here, container body 21 is through forming the lamination sheets drawing and forming with the mode of co-extruded films in the inboard, this lamination sheets by thickness be 100 μ m aluminium foil 27, with the thickness that is engaged in the aluminium foil single face be that the not stretching synthetic resin co-extruded films of 300 μ m forms.

The said synthetic resin co-extruded films that do not stretch has: the thickness that is formed by high density polyethylene (HDPE) is the ground floor 24 of the face side of 70 μ m, and the thickness that is formed by polypropylene of aluminium foil 27 sides is the second layer 25 of 230 μ m.Two- layer 24,25 fit tightly with the wide bind strength of about 800g/15mm with freely peeling off and to form.

In addition, among this embodiment, via bond layer printed layers (diagram slightly) is set, and then is provided with the protecting hood cover layer 28 that forms by un-stretched polypropylene that thickness is 30 μ m in the printed layers outside at the outside face of aluminium foil 27.

And, near the part container body opening circumference of flange part 23, the ground floor 24 of the face side of the co-extruded films that do not stretch around flange part 23 complete cycles be provided with joint-cutting 211.

In addition, joint-cutting 211 for example can be through forming removing under ground floor 24 partial cut or with ground floor 24 patterned heats with cutter.

And, in said container body 21, include contents such as dessert, cooked food (diagram is slightly) in, cover the lid 22 that lower surface has heat seal material layer 26.

Among this embodiment, shown in figure 11, use to be initially at and cover 22 and be not provided with and break a seal with lid grip part 214, that have the circle of the big external diameter (Fig. 7 long and short dash line part) of external diameter (Fig. 8 long and short dash line part) than flange part 23.

And,, at first, use 1 the heat seal device 221 of heating surface through possessing sealing, with about 40kgf/cm as the sealing head of grid striated (embossing shape) like Fig. 8 and shown in Figure 9 ²Sealing load with the Outboard Sections of the joint-cutting 211 of the ground floor 24 of container body flange part 23 and heat seal layer 26 part heating and pressurizing welding with cooresponding lid 22 sides of this Outboard Sections, form the first heat-sealing oral area A that engages the wide cut ring-type that forms with more weak relatively bonding force with grid striated junction surface.Here, the bind strength of first of the wide cut ring-type heat-sealing oral area A for example for about 1.5kg/15mm wide more than.

So Presed flower enclosed through implementing; Especially as Fig. 3 is shown specifically; Because in the cancellous space part 210 between the junction surface of inclusion entering grid striateds such as the water that between the ground floor 24 of flange part 23 and heat seal material layer 26, exists, jam; Thereby can engage two- layer 24,26, thus abundant airtight container.

Then, shown in figure 10, the sealing of the ring-type that utilization is lower with the height of the sealing head inner peripheral portion of 2 heat seal devices 222 is with protuberance 223, with about 80kgf/cm ²Sealing load the first heat-sealing oral area A in-to-in counterpart is carried out heating and pressurizing welding again, form the second heat-sealing oral area B that engages the ring-type in a narrow margin that forms with the strong moderate relatively bonding force of situation than the first heat-sealing oral area A.Thus,, can fully tolerate in this and press, not damage leak tightness even if for example the heating when sterilizing because of autoclave etc. makes to press in the airtight container and uprises under such situation.Here, in a narrow margin the bind strength of second of the ring-type heat-sealing oral area B for example for about 2.5kg/15mm wide more than.

And then meanwhile; Utilization be positioned at the sealing head outer peripheral edges portion of this heat seal device 222 and than annular seal with the sealing of the ring-type of the height l of outstanding high 0.3mm downwards of the lower surface of protuberance 223 with protuberance 224; At the outer peripheral edges portion flange part of the first heat-sealing oral area A, with about 120kgf/cm ²High sealing pressure with ground floor 24 counterpart heating and pressurizing welding once more with heat seal material layer 26, thereby form the 3rd heat-sealing oral area C that engages the ring-type that forms with stronger relatively bonding force.Here, the bind strength of the 3rd of ring-type the heat-sealing oral area C for example for about 3.0kg/15mm wide more than.

Then; To cover 22 through inner peripheral and make Kaifeng in the residual a part of general triangular of lid 22 1 sides with grip part 214 (long and short dash line partial sum long and two-short dash line is partly by stamping-out among Figure 11), thereby obtain having 3 packaging for foodstuff airtight containers that seal oral area A, B, C like Fig. 7 and Figure 10～shown in Figure 12 with flange part 23 stamping-outs along the 3rd heat-sealing oral area C of this ring-type.

When the packaging for foodstuff airtight container that will so be formed with 3 heat-sealing oral area A, B, C breaks a seal; Grip cover Kaifeng of 22 with grip part 214, with its to above during pull-up; Flange part side end in Kaifeng with grip part 214; The heat seal material layer 26 of the ground floor 24 of flange part 23 and lid 22 is because of the 3rd heat seal material layer C mortise, therefore, and under this two- layer 24,26 state of fitting tightly; 2 retes 24 of the co-extruded films that do not stretch of flange part 23 sides, peel off the Kaifeng that to cover reliably thus between 25.And two- layer 24,25 owing to fit tightly with the wide bind strength of freely peeling off of about 800g/15mm, thereby when breaking a seal, need not bigger power, can be easy to peel off.

Figure 13 representes the 3rd embodiment.Here, the situation difference with said the 2nd embodiment is that the resin bed of container body 21 is 1 layer.

Promptly; Among the 3rd embodiment; Container body 21 is that ground floor 24 and the thickness of the face side that is formed by polypropylene resin film of 300 μ m is that the second layer 25 formed lamination sheets of the rear side that is formed by aluminium foil of 100 μ m are processed by having thickness; And as peeling off freely the contact agent layer that engages each other with two- layer 24,25, using the polyethers with easy fissility is lining cement.At this moment, two- layer 24,25 peel strength is that 800g/15mm is wide.

Figure 14 representes the 4th embodiment.Among the 4th embodiment; The structure of the resin bed of container body 21 is identical with the situation of said the 2nd embodiment; But different with the situation of said the 2nd embodiment is; Safety in order to realize using is also given feeling of high class and is improved intensity container; Leading section at flange part 23 is provided with crooked edge (rim roll) 213, and near near the crooked edge 213 of the partial sum container body opening circumference of flange part 23 partly respectively along flange part 23 complete cycles be equipped with first joint-cutting 211 and second joint-cutting 212 that cross-sectional plane is a V-arrangement.

In addition, among the 4th embodiment, use circumference one side outside from initially just being provided with the lid 22 of Kaifeng with grip part 214, in addition, circular-arc for roughly at the sealing use protuberance 224 that a side of the sealing head outer peripheral edges portion of 2 heat seal devices 222 shown in Figure 10 is provided with.

Figure 15 representes the 5th embodiment.Among the 5th embodiment; Safety in order to realize using is also given feeling of high class and is improved intensity container; Leading section at flange part 23 is provided with crooked edge (shape bending edge hangs down) 215, and the situation of the resin bed of container body 21 and said the 3rd embodiment is similarly 1 layer.

The others of said the 3rd embodiment～the 5th embodiment and the situation of said the 2nd embodiment are same, therefore in Figure of description to same parts mark prosign.

In addition, among said each embodiment, be arbitrarily at the shape of cross section of the joint-cutting 211,212 that is provided with in the film formed ground floor 24 by resin of container body flange part 23, be not limited to graphic shape.

In addition, graphic is that near the ground floor 24 of the part container body opening circumference of flange part 23 is provided with joint-cutting 211, but this joint-cutting 211 also can be located at the ground floor 24 of the container body opening circumference of flange part 23.

The 2nd embodiment of second embodiment as stated; This used for packing foods easy-open container has: the container body that has flange part at the opening circumference; And, covering container main body and flange part and lower surface have the heat seal material layer and outside a side of circumference be connected with Kaifeng with the lid of grip part, container body is processed by lamination sheets; This lamination sheets have by the film formed ground floor of synthetic resin be joined so the second layer state that is prone to separate, that form by synthetic resin film or metallic paper with the outside face of this ground floor; Near the part container body opening circumference of flange part or this circumference, ground floor along the roughly complete cycle of flange part be provided with the ring-type joint-cutting, wherein; The outside at the ring-type joint-cutting; Ground floor at flange part is provided with the first heat-sealing oral area that engages and have the wide cut ring-type at grid striated junction surface with relative more weak bonding force with the heat seal material layer of lid, between the junction surface of grid striated, forms cancellous inclusion entering and uses space part, therefore; Even if between the heat seal material layer of the film formed ground floor by resin of the flange part of container body and lid lower surface, have inclusiones such as water, jam; These inclusion also can get in the cancellous space part between the grid striated junction surface, thereby can be with two-layer joint, fully airtight container.

In addition; Owing to seal the inside of oral area in first of this ring-type; When forming tolerance and sterilize because of autoclave heating etc. make press in the airtight container increase, engage the ring-type in a narrow margin that forms with moderate relatively bonding force second seal oral area; Even if the heating when autoclave is sterilized etc. makes to press in the airtight container and uprises under such situation, also can fully tolerate in this and press, leak tightness can be not impaired.

And then owing to form the 3rd heat-sealing oral area that forms with stronger relatively bonding force joint with the flange part side end of grip part in Kaifeng; Therefore when the grip part is used in the Kaifeng that grips lid; Flange part side end in Kaifeng with the grip part; The heat seal material layer of the ground floor of flange part and lid is because of the 3rd heat seal material layer mortise, therefore, and under the state that ground floor and heat seal material layer are fitted tightly; Between 2 layers that the flange part side fits tightly with the bind strength of freely peeling off, peeled off the Kaifeng that reliably to cover thus simply.And 2 layers of flange part side are owing to fit tightly with the bind strength of freely peeling off, thereby when Kaifeng, need not bigger power, therefore, can be easy to peel off, thereby container have easy operation and effect very easily.

In addition, the second～5 embodiment of second embodiment is owing to be provided with crooked edge at the leading section of flange part, thereby can give feeling of high class and improve intensity container.

And; Centre at first joint-cutting and second joint-cutting of the ground floor of being located at flange part;, between the junction surface of grid striated, form cancellous inclusion entering and use space part with the first heat-sealing oral area that more weak bonding force relatively engaged and had the wide cut ring-type at grid striated junction surface in the heat seal material layer setting of the ground floor of flange part and lid, thus same with the situation of the foregoing description; Even if there are inclusiones such as water, jam, also abundant airtight container.

In addition; Owing to seal the inside of oral area in first of such ring-type; Heating etc. makes and presses the second heat-sealing oral area that increases, engage the ring-type in a narrow margin that forms with moderate relatively bonding force in the airtight container when being formed with tolerance and sterilizing because of autoclave; Even if thereby the heating when sterilizing because of autoclave etc. makes to press in the airtight container and uprises under such situation, also can fully tolerate in this and press, do not diminish leak tightness.

And then; Owing to form with stronger relatively bonding force with the flange part side end of grip part in Kaifeng and to engage the 3rd heat-sealing oral area that forms, thereby have following effect: the sealing that can cover reliably, and need not bigger power when breaking a seal; Can be easy to peel off, thereby handle easily and very convenient.

The 3rd embodiment

Next, the 3rd embodiment of the utility model is described based on Figure 16～Figure 17.

In the accompanying drawings; In the used for packing foods container 310 for the utility model; The container body 311 that has flange part 312 at the opening circumference is processed by lamination sheets 31, and this lamination sheets 31 possesses: thickness is the aluminium foil 32 of 120 μ m, the aluminium foil single face via bond layer 34 engage the thickness that forms be 300 μ m by (II) the film formed synthetic resin layer 33 of synthetic resin coextrusion that do not stretch; And, the protecting hood cover layer 37 that engages with the another side of aluminium foil 32.

In addition; (II) that the constitutes synthetic resin layer 33 synthetic resin co-extruded films that do not stretch possesses the second layer 33b that is formed by polypropylene that the ground floor 33a that is formed by high density polyethylene (HDPE) that thickness is 70 μ m and thickness are 230 μ m, and two- layer 33a, 33b are that the segregative state of 800g/15mm about wide fits tightly with the bind strength.Protecting hood cover layer 37 is by with 1～3g/m ²The epoxy resin that applies of coating weight constitute.

Flange part 312 at said container body 311; Make the first synthetic resin layer 33a be rim roll 313 inboard and the warp type that protecting hood cover layer 37 forms for ground, the outside curls in order to be provided with heat seal material layer 322 heat welded of lid 321; And near part near the part container body opening circumference of flange part 312 and rim roll 313 centers on flange part 312 and roughly 2 joint-cuttings 315,316 that same cross-sectional is roughly V-arrangement is set complete cycle ground respectively in the first synthetic resin layer 33a.In addition, the first the most inboard synthetic resin layer 33a of container body 311 is littler with the bonding force of the heat welded of the heat seal material layer 322 of lid 321 than the first synthetic resin layer 33a in the middle of two joint-cuttings 315,316 with the bonding force of the second synthetic resin layer 33b.

And; In the utility model; The centre portion of joint-cutting 316 and rim roll 313 externally; The thermal welding that is formed by amilan that is provided with thickness on the surface of the first synthetic resin layer 33a of flange part 312 and is 50 μ m prevents layer 319, and at this centre portion, the heat seal material layer 322 of lid 321 prevents that with this thermal welding layer 319 from contacting all the time.

In addition; Area at the peristome of container body 311 is in the general home-use used for packing foods container 310 of for example 30～300cmf; The positional precision that joint-cutting forms the joint-cutting mouth processing of device is generally ± 0.5mm; In addition, the positional precision of heat-sealing is ± 0.5mm that the safety distance that should guarantee when when processing of joint-cutting mouth and heat-sealing, producing deviation respectively is 0.5mm.And then inner joint-cutting 315 is generally 1.5～2.0mm with the distance of heat-sealed part.

When heat-sealing; The heating pressing position of the heating pressing component 325 of heat seal device what can put to rim roll 313 lateral deviations sometimes; Even if but the heating pressing position so puts to rim roll 313 lateral deviations, because externally the surface of joint-cutting 316 and the first synthetic resin layer 33a of the centre portion of rim roll 313 is provided with thermal welding and prevents layer 319, thereby the outside of joint-cutting 316 externally; Heat seal material layer 322 fully not can with the first synthetic resin layer 33a thermal welding, therefore can realize the failure-free heat seal.

In the used for packing foods container 310 of said utility model, pack under the state of dessert, cooked food; If the Kaifeng of circumference one side that grips lid shown in Figure 17 321 is with grip part 323 and when uncover the top; Under the state that keeps heat-sealed part to engage, peel off from outside joint-cutting 316 easily between the first synthetic resin layer 33a and the second synthetic resin layer 33b.Therefore, the Kaifeng of container 310 need not bigger power, can carry out simply, can be easy to peel off, and can make the Kaifeng property of container 310 stable.

In addition, the used for packing foods container 310 of said embodiment is owing to use aluminium foil 32, thereby barrier is excellent, can the permanently effective preservation of carrying out contents such as dessert, food for cooking and cooked food.In addition, owing to aluminium foil 2 engages with synthetic resin layer 33, thereby intensity is very high, therefore, also is difficult to produce depression even if be hit.And owing to use aluminium foil 32, thereby have feeling of high class, aesthetic appearance excellence.And then, can be cold deep-draw be shaped and quality very excellent, therefore, but batch manufacturing, and capacity rating is excellent.

In addition, above-mentioned in the middle of, the shape of cross section of being located at the joint-cutting 315,316 among the synthetic resin layer 33a is not limited to graphic shape, also can be other shape.In addition; Two joint-cuttings 315, the interval between 316 make the heat seal material layer 322 part heat welded of synthetic resin layer 33a below lid 321 of flange part 313 get final product in the middle of two joint-cuttings 315,316 according to wide the deciding of heat-sealing of the heating pressing component 325 of heat seal device in a word.

In addition; In the middle of the foregoing description; Show following such used for packing foods container 310; Its first synthetic resin layer 33a that has in order to make flange part 312 with heat seal material layer 22 heat welded of lid 321 is rim roll 313 inboard and the warp type that protecting hood cover layer 37 forms for ground, the outside curls; But be not limited to this, concerning the utility model, for have used for packing foods container that the first synthetic resin layer 33a that makes flange part 312 is the rim roll just rolled up of what is called that the outside and protecting hood cover layer 37 forms for curling medially, or the used for packing foods container that also has a shape bending edge that hangs down all fully likewise be suitable for.

As stated, for the used for packing foods container of the 3rd embodiment, the container body that has flange part at the opening circumference is processed with the lamination sheets that the synthetic resin layer more than 1 layer or 2 layers that is engaged in the metallic paper single face forms through possessing metallic paper; Flange part at container body is provided with crooked edge; Near part near the crooked edge of the partial sum container body opening circumference of flange part or the opening circumference; For with the lid heat seal material layer heat welded and on first synthetic resin layer respectively around flange part roughly be provided with complete cycle inside and outside a pair of joint-cutting; The centre portion of joint-cutting and crooked edge externally, the surface of any one is provided with thermal welding and prevents layer in the heat seal material layer of first synthetic resin layer of flange part and lid; The first the most inboard synthetic resin layer of container body and the bonding force of the metallic paper or second synthetic resin layer are littler than the bonding force of the heat seal material layer heat welded of middle first synthetic resin layer of two joint-cuttings and lid; This used for packing foods container possesses crooked edge at the leading section of flange part; Thereby has feeling of high class and safe; Even if put to crooked edge lateral deviation the heat-sealing position of its heat seal device; The also not externally first synthetic resin layer thermal welding of the outside of joint-cutting and flange part of heat seal material layer of lid; Therefore, has following effect: can carry out the Kaifeng of container very simply and need not bigger power, can be easy to peel off, can make the Kaifeng property of container stable.

Other embodiment

In addition, preferably, on the flange part of used for packing foods container the cardinal extremity of grip part of bonding lid be bonded on the flange part of used for packing foods container.

Further preferably, on the flange part of said used for packing foods container the periphery of bonding lid in whole scope, be bonded on the flange part of used for packing foods container and sealing.

Have, also can be, the periphery that is bonded in the lid on the flange part of used for packing foods container be excised except that the grip part, and adhesive portion is exposed on the junction surface end face of lid and used for packing foods container.

In addition,, container when the stacked used for packing foods container is desirably near part cambium layer poor (omitting diagram) the opening circumference of container body for not fitting tightly each other.

Claims (13)

1. used for packing foods container; It is characterized in that; It possesses: container body (11,21,311); Its through so that ground floor (3) for inboard mode lamination sheets (1) drawing and forming is formed, this lamination sheets (1) have by the film formed ground floor of synthetic resin (3,24) be joined so the second layer (2) state that can separate, that form by synthetic resin film or metallic paper with the outside face of this ground floor; And, flange part (12,23,312), it is located at the opening circumference of this container body,

Said ground floor (3) has the rete (3a) of peeling off the face side that fits tightly freely each other and the rete (3b) of rear side at least; Near the part container body opening circumference of flange part (12,23,312) or this circumference; For the heat seal material layer (14,26,322) with the lid (13,22,321) that covers said container body (11,21,311) and flange part (12,23,312) engages, on the rete (3a) of the face side of said ground floor (3,24), center on flange part (12,23,312) and be provided with joint-cutting (16,211,212,315,316) complete cycle.

2. used for packing foods container as claimed in claim 1; It is characterized in that; Said ground floor (3) is the not stretching synthetic resin co-extruded films of 200～400 μ m for the thickness that engages with the single face of the said second layer (2), and the said second layer (2) is that thickness is the aluminium foil of 40～150 μ m.

3. used for packing foods container as claimed in claim 1 is characterized in that, the rete (3a) of the face side of said ground floor (3) is peeled off freely each other via knitting layer (8) with the rete (3b) of rear side and engaged.

4. used for packing foods container as claimed in claim 1; It is characterized in that also possessing lid (22), its covering container main body (21) and flange part (23) and lower surface have heat seal material layer (26); And a side of circumference is connected with Kaifeng with grip part (214) outside

Near the part container body opening circumference of flange part (23) or this circumference, the roughly complete cycle of said ground floor (24) upper edge flange part (23) be provided with ring-type joint-cutting (211); The outside in ring-type joint-cutting (211), the heat seal material layer (26) of the said ground floor (24) of flange part (23) and lid (22) be provided with more weak bonding force relatively engages form and have grid striated junction surface the wide cut ring-type first seal oral area (A); Between the junction surface of grid striated, forming cancellous inclusion gets into space part (10); Press in the airtight container that heating causes when the inboard of the first heat-sealing oral area (A) of this ring-type forms tolerance and sterilize because of autoclave increase, engage the ring-type in a narrow margin that forms with moderate relatively bonding force second seal oral area (B); Form the 3rd heat-sealing oral area (C) that forms with stronger relatively bonding force joint in Kaifeng with the flange part side end of grip part (214).

5. used for packing foods container as claimed in claim 1; It is characterized in that also possessing lid (22), its covering container main body (21) and flange part (23) and have heat seal material layer (26) at lower surface; And a side of circumference is connected with Kaifeng with grip part (214) outside

Leading section at the flange part (23) of container body (21) is provided with crooked edge (213), (215); Near part near the crooked edge (213) of the partial sum container body opening circumference of flange part (23) or this circumference, (215), on said ground floor (24) respectively flange part (23) roughly the complete cycle scope be provided with first joint-cutting (211) and second joint-cutting (212); In the middle of said two joint-cuttings (211), (212), the said ground floor (24) and the heat seal material layer (26) of lid (22) of flange part (23) be provided with more weak bonding force relatively engage form and have grid striated junction surface the wide cut ring-type first seal oral area (A); Between the junction surface of grid striated, forming cancellous inclusion gets into space part (210); In the inboard of the first heat-sealing oral area (A) of this ring-type, press in the airtight container that heating causes when forming tolerance and sterilize because of autoclave increase, engage the ring-type in a narrow margin that forms with moderate relatively bonding force second seal oral area (B); Be formed with the 3rd heat-sealing oral area (C) that forms with stronger relatively bonding force joint in Kaifeng with the flange part side end of grip part (214).

6. used for packing foods container as claimed in claim 1 is characterized in that, the flange part (312) in container body (311) is provided with crooked edge (313); Near part near the crooked edge of partial sum (313) the container body opening circumference of flange part (312) or the opening circumference, for heat seal material layer (322) heat welded of lid (321) center on respectively on the rete (33a) of face side flange part (312) roughly be provided with complete cycle inside and outside a pair of joint-cutting (315), (316); The centre portion of joint-cutting (316) and crooked edge (313) externally, arbitrary side's surface is provided with thermal welding and prevents layer (319) in the heat seal material layer (322) of the rete (33a) of the face side of flange part (312) and lid (321); The bonding force of the rete (33a) of the face side that container body (311) is the most inboard and the rete (33b) of metallic paper (32) or rear side is less than the rete (33a) of the face side in the middle of two joint-cuttings (315) (316) and the bonding force based on heat welded of the heat seal material layer (322) of lid (321).

7. used for packing foods container as claimed in claim 1 is characterized in that, it is poor that part is formed with layer near the opening circumference of said container body (11).

8. used for packing foods container as claimed in claim 1; It is characterized in that, on the flange part of said used for packing foods container (10) the cardinal extremity of grip part (214) of bonding lid (13,22,321) be bonded on the flange part (12,23,312) of said food container (10).

9. used for packing foods container as claimed in claim 8; It is characterized in that, on the flange part of said used for packing foods container (10) the periphery of bonding lid (13,22, the 321) flange part (12,23,312) that in whole scope, is bonded in said food container (10) go up and seal.

10. used for packing foods container as claimed in claim 8; It is characterized in that; The periphery that is bonded in the lid (13,22,321) on the flange part (12,23,312) of said food container (10) is excised except that grip part (214), and adhesive portion is exposed on the junction surface end face of said lid (13,22,321) and said food container (10).

11. used for packing foods container as claimed in claim 1; It is characterized in that; Said is the multi-layer synthetic resin rete of lit-par-lit structure of second rete (3b) with first rete (3a) and rear side of the face side that is made up of high density polyethylene (HDPE) by the film formed ground floor of synthetic resin (3,24); Wherein, second rete (3b) is constituted, perhaps is made up of bind strength key-course and polypropylene that polypropylene and poly-vinyl constituted by polypropylene.

12. used for packing foods container as claimed in claim 11 is characterized in that, the lower end that is formed on the joint-cutting on the multi-layer synthetic resin rete connects said first rete (3a).

13. used for packing foods container as claimed in claim 12 is characterized in that, the bottom of said joint-cutting connects said first rete (3a), and said bind strength key-course exposes.

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