CN1814508B - Thin-package lamina material and package container formed thereby - Google Patents
Thin-package lamina material and package container formed thereby Download PDFInfo
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- CN1814508B CN1814508B CN 200510006165 CN200510006165A CN1814508B CN 1814508 B CN1814508 B CN 1814508B CN 200510006165 CN200510006165 CN 200510006165 CN 200510006165 A CN200510006165 A CN 200510006165A CN 1814508 B CN1814508 B CN 1814508B
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- package lamina
- heat sealable
- lamina material
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Abstract
The invention relates to thin packaging laminate material for packaging container of liquid food. It has the following structure: out heat seal layer, thin paper layer, laminate material layer, and inner heat seal layer. The invention also relates to the packaging container for liquid or flowing food, which is made up from the laminate material.
Description
Technical field
The present invention relates to be used for the thin and heat sealable paper substrate package lamina material of the packing container of liquid food.The invention particularly relates to economically feasiblely, but still have full intensity and durability, and can be shaped and be sealed into this type of laminated material of the packing container of simple and flexible shape.And though this laminated material has thin thickness, it should have the abundant iris action that is used for food, and such as the interception that is used for light sensitivity food, and client and client think the acceptable profile.This laminated material especially is very suitable for container or the sterile food packing container that extraordinary high temperature (UHT) is handled food.
Background technology
On market, hygienically packaged container for liquid or fluid food products exists demand, and this packing container has the acceptable shelf life under environmental conditions. this type of container can be aseptic type and/or purpose be used for the type that extraordinary high temperature (UHT) is handled food or other food.They also must be fully worthwhile economically for their market prospective, therefore, forms that their package lamina material should advantageously approach and cost efficient.It needn't be shaped as the self-supporting shape that has size and grip stability, but can be configured as simple and flexible shape simply, such as pillow-like.Yet the feature that it must have is sufficient light-proofness, degenerates and/or demonstrates peculiar smell so that prevent photosensitive food in the container.
Being that ply of paper is too thin with the thin problem relevant with economically feasible paper substrate package lamina material is difficult to form sufficient shading. and therefore, the special-purpose light screening material of some type must be included in this laminated material.
Based on the packing of plastics, known introducing carbon black is as light screening material with regard to merely.
Yet, with in one deck (this layer plan is located in the inboard away from the laminated material of ply of paper) of laminated material, use carbon black as a relevant problem of light screening material be it black by thin, white but incomplete opaque ply of paper part as seen, this has given laminated material and container with can not be by the uneven gray appearance that the customer received.Yet it is very uneconomic using thicker paper to solve this problem.
Though can be by hiding black with the composite coating ply of paper that comprises pigment or by on ply of paper, being printed with color ink, these terms of settlement are expensive, conceive inconsistent with wishing the competitive low cost of package lamina material/vessel.
In addition, though can be by Chinese white only being joined the laminate ply of laminated material, promptly at ply of paper with comprise in the middle of the interior layer of carbon black-between layer in, or the heat sealable layer of the most external that only joins laminated material is hidden black, but this terms of settlement has caused some problem, because in such individual course, need to introduce quite a large amount of Chinese whites. these problems are included in the startup of the conversion manufacturing line that is used to make laminated material and close the problem in stopping time, because excessive Chinese white is deposited on the process equipment in the heat sealable layer of the most external of laminated material.Therefore, if the production on the manufacturing line temporarily is converted to another product, obtained at its outermost layer by the product of Chinese white " pollution " in any case must carry out the production of the preceding several hrs of a large amount of cleanings and second kind of product, given its uneven outward appearance that can not make us accepting.
Summary of the invention
The purpose of this invention is to provide and be used for liquid or fluid food products, thin and heat sealable paper substrate package lamina material such as the packing container of dairy products, this laminated material be fully thin and from but expense is cheap, has competitive power, yet have enough good performance with regard to health, leak tightness, intensity, covering and the outward appearance of the packing container that forms by this laminated material. from the viewpoint of conversion, should be advantageously, avoid or reduced above-mentioned at least in the problem aspect this.
The thin package lamina material of the packing container of these and other objects by being used for liquid food realizes that it has following layer structure, and order be outside to the inside from laminated material:
-by having the outside heat sealable layer that Chinese white comprises that wherein thermoplastic material is formed,
-tissue layers,
-by having the laminate ply that Chinese white comprises that thermoplastic material is wherein formed,
-by having the heat sealable layer in inside that dark pigment comprises that thermoplastic material is wherein formed.
The invention still further relates to the packing container that forms by this laminated material.
Owing in the heat sealable layer in inside, contain dark pigment, preferred black pigment is such as carbon black, this laminated material reaches the container that is formed by it and has obtained sufficient light covering, make the food contents of container can not degenerate owing to light exposes to the open air. by in the outside heat sealable layer of thermoplastic laminate layer and thermoplastic material composition, containing Chinese white, such as titanium dioxide (TiO
2), this laminated material and the container that is formed by it have obtained acceptable white appearance, though inner dark pigment layer is arranged.
In a preferred embodiment, wherein comprised the thermoplastic laminate layer of Chinese white and the outside heat sealable layer of the thermoplastic material composition that has comprised Chinese white and directly be adhered to ply of paper, promptly without any interlayer.
The special benefits that comprises Chinese white in the outside heat sealable layer that thermoplastic material is formed is that print pattern can be located immediately on the outside heat sealable layer of thermoplastic material composition, and it is randomly by the lacquer protection there.Also have, the laminated material of finishing can not have printed patterns with the standard form storage.This means that also printing occurs in than on the thicker laminated material of paper self, and this is more favourable than directly being printed on the thinner paper. in a word, solution of the present invention causes for the less processing of tissue layers self.Additional advantage is that the higher more central layer of desired strength need not comprise a large amount of Chinese white fillers.Also have, if compare with the situation that a large amount of Chinese whites only are included in the outside heat sealable layer, the Chinese white that is deposited on the process equipment can be still less, if produce second kind of laminated material even the conversion manufacturing line temporarily is converted to, residual Chinese white can not become problem, because it is positioned in the more central layer of laminated material, below ply of paper, it is than more being difficult for seeing at skin there. because reflex, advantageously the shaded effect of Chinese white exists in two-layer different layer.And, if it is more invisible to be present in any striped that the Chinese white in two-layer forms.
According to an aspect of the present invention, the heat sealable layer in described outside is by having 880-970kg/m
3, preferred 910-930kg/m
3The polyethylene extrusion material of density form. it can have 8-25g/m
2, preferred 10-20g/m
2, more preferably 10-15g/m also
2Weight.It can be made up of several preferred coextrusion layerings, and wherein outermost layer is heat sealable at least.Chinese white is with 1wt% at least, preferred 2wt% at least, more preferably 5wt% at least also, but 30wt% at the most, preferred 20wt% at the most, also more preferably at the most the content of 15wt% be included in this layer.Suitable is that described Chinese white is a titanium dioxide, though it is contemplated that the Chinese white of other type.Because be difficult to comprise the Chinese white of bigger content in the thermoplastic layer, so this layer must be thicker, in the upper end of the above scope that provides, the Chinese white of big if desired total amount is hidden the words of the dark pigment in the inner heat sealable layer.Also have, this laminate ply can be made up of several preferred coextrusion layerings, in this case, Chinese white can be included in these layerings (part-laryers) one or more layers or all layer in.
According to another aspect of the present invention, described tissue layers is by having 30-80g/m
2, preferred 40-70g/m
2, more preferably 40-60g/m also
2The BK bleached kraft of weight form. it has sufficient basic weight and the intensity that obtains enough lamination strength with other layer.Most preferably, use about 50g/m
2Ply of paper, it has obtained many advantages of comparing with thinner ply of paper.For example have seldom with curl and wrinkling relevant problem, because material is finer and close, obtained improved opacity (because can use shorter fiber and/or filler, this is not need to improve intensity owing to comparing with thinner paper), the wideer range of choice of the paper that can obtain to be fit to, hermetyic window can increase in some cases, the excessive heat because the paper of recruitment can receive and distribute, make that the local overheating of plastic sealing layer is avoided, or the like.And the stiffness of gained packing container will be modified.Certainly, can use the flexible paper of other type of similar thickness and performance.It is also contemplated that the use laminated paper.
According to a further aspect of the invention, heat sealable layer in described outside and laminate ply comprise 1wt% at least together in this layer, preferably 2wt% at least, more preferably 5wt% at least also, but 30wt% at the most, preferred 20wt% at the most, the also more preferably Chinese white of the content of 15wt% at the most.
According to a further aspect of the invention, the thermoplastic material of described laminate ply is to have 880-970kg/m
3, preferred 910-930kg/m
3The polythene material of density.It can have 8-50g/m
2, preferred 10-40g/m
2, more preferably 15-30g/m also
2Weight.Chinese white is preferably with 1wt% at least, preferred 2wt% at least, and more preferably 5wt% at least also, but 20wt% at the most, preferred 15wt% at the most also, more preferably the content of 12wt% is included in this layer at the most.Suitable is that described Chinese white is a titanium dioxide, though it is contemplated that the Chinese white of other type.Because be difficult to comprise the Chinese white of bigger content in the thermoplastic layer, so this layer must be thicker, in the upper end of the above scope that provides, the Chinese white of big if desired total amount is hidden the words of the dark pigment in the inner heat sealable layer.Also have, this laminate ply can be made up of several preferred coextrusion layerings, in this case, Chinese white can be included in these layerings one or more layers or all layer in.
Inner heat sealable layer is suitable to being selected from polythene material, preferably has 880-970kg/m
3, more preferably 910-930kg/m
3The polythene material of density, polypropylene, thermoplastic material in ethane-acetic acid ethyenyl ester and the thermoplastic propene's acid copolymer (neutralization or not neutralization) is formed. and it can be made up of several preferred coextrusion layerings, its innermost layer is heat sealable at least. here, should be noted that, term " innermost layer " is meant the outmost layer in the inside of laminated material, i.e. the layer that contacts with the content of the packing container that forms thus.Inner heat sealable layer can have 10-45g/m
2, preferred 13-35g/m
2, more preferably 20-30g/m also
2Gross thickness, depend on the quality of thermoplastic material. it is suitable to comprise that content is 0.2-2g/m
2, preferred 0.2-1g/m
2, more preferably 0.3-0.8g/m also
2Yet dark pigment., because dark pigment is not very expensive and because it is very easy to introduce in thermoplastic material, thus can imagine, it can with in addition bigger content, such as at the most 3 or 4g/m
2Comprise.Suitable is that described dark pigment is a carbon black.Under the situation that the heat sealable layer in inside is made up of several layerings, dark pigment can these layerings one or more layers or all layer in comprise.
Preferably, inner heat sealable layer was made before it is introduced in package lamina material in advance, and promptly it has constituted prefabricated membrane, suitablely passed through (being total to) extrusion-blown modling, and (being total to) extruded curtain coating (extrusioncasting) or (being total to) and extruded rubberizing and prepare.Blowing or cast film have the advantage of comparing with extruding layer, because it has better intensity and oxidative degradation material still less, because it prepares under lower temperature, and it has higher mechanical characteristics of control degree and lateral performance.
Heat sealable layer is to change if desired to change film and/or paper quality on the manufacturing line easily with the advantage of using prefabricated ply of paper as body layer as inside to use prefabricated membrane in thin layer pressure material according to the present invention, Food Contact layer grade for example, and not too strict to the requirement of the accuracy rate of extruding thickness of extruding layer (outside heat sealable layer and laminate ply).
Package lamina material has 60-180g/m
2, preferred 70-150g/m
2, more preferably 75-125g/m also
2Total weight.
The invention still further relates to by this class package lamina material and form packing container with liquid or fluid food products content.It for example can have a vertical sealing-in and in the flexible pillow shape of two horizontal sealing-ins of the opposite end of container.
Description of drawings
With reference to preferred embodiment and accompanying drawing the present invention is described in more detail hereinafter now.In the accompanying drawings:
Fig. 1 has shown the cross-sectional plane according to laminated material of the present invention,
Fig. 2 has shown the packing container that the laminated material by Fig. 1 forms,
The specific embodiment
In Fig. 1, according to being expressed as 10 on the preferred overall laminate of the present invention.It is made up of four layers 12,13,14 and 15. and ply of paper 12 is made by BK bleached kraft, has about 50g/m
2Weight.The outside heat sealable thermoplastic layer 13 who extrudes has constituted the outside of the packing container that is formed by laminated material 10, and is made by low density polyethylene (LDPE) (LDPE), has about 12g/m
2Weight.In this weight, the 8%th, TiO
2, it gives layer 13 with white and desirable opaque outward appearance, therefore hidden the inner heat sealable thermoplastic layer 14 of the inner heat sealable thermoplastic layer of black 14. and the packing container that forms by laminated material 10 in Food Contact.It is the film of extrusion-blown modling linear low density polyethylene (LLDPE), and has 23g/m
2Weight.In this weight, 0.4g/m
2Be carbon black, it gives layer 14 with appearance of black with play shading.When the outside of laminated material 10 is watched, promptly when when layer 13 is watched, the black of layer 14 is covered with extruding laminate ply 15 by the heat sealable thermoplastic material layer 13 in outside.Laminate ply 15 is made by low density polyethylene (LDPE) (LDPE), and has about 17g/m
2Weight.In this weight, the 6%th, TiO
2, it gives layer 15 with white and desirable opaque outward appearance, has therefore hidden the inner heat sealable thermoplastic material layer 14 of black.
Fig. 2 has shown the packing container 20 by the shaping-filling of laminated material shown in Figure 1-encapsulating method preparation.It has flexible pillow shape, has a vertical sealing-in 22 and at two horizontal sealing-in 24a, 24b of container opposite end.
The film 14a that is made up of the heat sealable thermoplastic material that wherein comprises dark pigment launches from second roller 42.This film has constituted its film of extrusion-blown modling linear low density polyethylene (LLDPE) preferably of the heat sealable layer in the inside of package lamina material as shown in Figure 1 14., comprises described dark pigment.
As conclusion, should find, the invention is not restricted to of below specifically describing with reference to the accompanying drawings described and these embodiments of expression as just example, and the modification and the change that it will be apparent to those skilled in the art under situation about not departing from as the present invention's design of disclosing in appended claims are feasible.
Claims (22)
1. the thin package lamina material (10) that is used for the packing container (20) of liquid food, it has following layer structure, and order is outside to the inside from laminated material:
-by having the outside heat sealable layer (13) that Chinese white comprises that wherein thermoplastic material is formed,
-tissue layers (12),
-by having the laminate ply (15) that Chinese white comprises that thermoplastic material is wherein formed,
-by having the heat sealable layer in inside (14) that dark pigment comprises that thermoplastic material is wherein formed.
2. according to the package lamina material of claim 1, the heat sealable layer in wherein said outside (13) is by having 880-970kg/m
3The polythene material of density form.
3. according to the package lamina material of claim 1 or 2, the heat sealable layer in wherein said outside (13) has 8-25g/m
2Weight.
4. according to the package lamina material of claim 1, heat sealable layer in wherein said outside (13) and described laminate ply (15) together comprise at least 1wt%, but the Chinese white of the content of 30wt% at the most.
5. according to the package lamina material of claim 4, the heat sealable layer in wherein said outside (13) comprises 2wt% at least, but the Chinese white of the content of 20wt% at the most.
6. according to the package lamina material of claim 4 or 5, the heat sealable layer in wherein said outside (13) is made up of two or more layerings.
7. according to the package lamina material of claim 1, the heat sealable layer in wherein said outside (13) directly is adhered on the described tissue layers (12).
8. according to the package lamina material of claim 1, wherein said tissue layers (12) is by having 30-80g/m
2The craft paper of weight form.
9. according to the package lamina material of claim 1, it has printed patterns on the heat sealable layer in described outside (13).
10. according to the package lamina material of claim 1, the thermoplastic material of wherein said laminate ply (15) is to have 880-970kg/m
3The polythene material of density.
11. according to the package lamina material of claim 1, wherein said laminate ply (15) has 8-50g/m
2Weight.
12. according to the package lamina material of claim 11, wherein said laminate ply (15) comprises 1wt% at least, but the Chinese white of the content of 20wt% at the most.
13. according to the package lamina material of claim 1, wherein said laminate ply (15) is made up of two or more layerings.
14. according to the package lamina material of claim 1, wherein said laminate ply (15) directly is adhered on the described tissue layers (12).
15. package lamina material according to claim 1, the heat sealable layer in wherein said inside (14) is made up of the thermoplastic material that is selected from following substances: polythene material, polypropylene, ethane-acetic acid ethyenyl ester, thermoplastic propene's acid copolymer of neutralization and unneutralized thermoplastic propene's acid copolymer.
16. according to the package lamina material of claim 15, the heat sealable layer in wherein said inside (14) has 10-45g/m
2Weight.
17. according to the package lamina material of claim 1, the heat sealable layer in wherein said inside (14) comprises that content is 0.2-2g/m
2Dark pigment.
18. according to the package lamina material of claim 1, the heat sealable layer in wherein said inside (14) is made up of two or more layerings.
19. according to the package lamina material of claim 17, wherein said dark pigment is a carbon black.
20. according to the package lamina material of claim 1, wherein the total weight of laminated material (10) is 60-180g/m
2
21. have the packing container (20) of liquid food content, wherein this container is by forming by each the package lamina material (10) according to claim 1-20.
22. according to the packing container (20) of claim 21, it has a vertical sealing-in (22) and in two horizontal sealing-ins (24a, pillow shape 24b) of the opposite end of container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510006165 CN1814508B (en) | 2005-01-31 | 2005-01-31 | Thin-package lamina material and package container formed thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510006165 CN1814508B (en) | 2005-01-31 | 2005-01-31 | Thin-package lamina material and package container formed thereby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1814508A CN1814508A (en) | 2006-08-09 |
| CN1814508B true CN1814508B (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510006165 Expired - Fee Related CN1814508B (en) | 2005-01-31 | 2005-01-31 | Thin-package lamina material and package container formed thereby |
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| Country | Link |
|---|---|
| CN (1) | CN1814508B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10301512B2 (en) | 2014-12-30 | 2019-05-28 | Avery Dennison Corporation | Wrapping films with increased opacity |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK200700924A (en) * | 2007-06-27 | 2008-12-28 | Innovic Holding Aps | High-efficiency IR absorbing surfaces of aluminum foil based on matching emitting wavelengths |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431206A1 (en) * | 2001-09-27 | 2004-06-23 | Tetra Laval Holdings & Finance S.A. | Paper packaging material for liquid food and method for production thereof |
-
2005
- 2005-01-31 CN CN 200510006165 patent/CN1814508B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1431206A1 (en) * | 2001-09-27 | 2004-06-23 | Tetra Laval Holdings & Finance S.A. | Paper packaging material for liquid food and method for production thereof |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-114523A 2004.04.15 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10301512B2 (en) | 2014-12-30 | 2019-05-28 | Avery Dennison Corporation | Wrapping films with increased opacity |
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| Publication number | Publication date |
|---|---|
| CN1814508A (en) | 2006-08-09 |
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