CN104760383A - Laminated packaging material - Google Patents
Laminated packaging material Download PDFInfo
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- CN104760383A CN104760383A CN201510156824.2A CN201510156824A CN104760383A CN 104760383 A CN104760383 A CN 104760383A CN 201510156824 A CN201510156824 A CN 201510156824A CN 104760383 A CN104760383 A CN 104760383A
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Abstract
The invention relates to a laminated packaging material. The laminated packaging material comprises a thermoplastic outermost layer, a core layer, a thermoplastic intermediate layer, a barrier layer and a thermoplastic innermost layer from outside to inside, wherein the thermoplastic innermost layer contains metallocene catalyst polymerized linear low-density polyethylene (LLDPE) and LLDPE; the metallocene catalyst polymerized LLDPE has the following parameters that the average density is 0.88-0.925g/cm<3>, the melt flow index (under the determination conditions of 190 DEG C and 2.16kg) is 5-20g per 10 minutes, the peak melting point is 85-130 DEG C, and the expansion ratio is 1.2-1.8; the LLDPE has the following parameters that the average density is 0.90-0.925g/cm<3>, the melt flow index (under the determination conditions of 190 DEG C and 2.16kg) is 5-20g per 10 minutes, the peak melting point is 85-110 DEG C, and the expansion ratio is 1.2-1.8. In an extrusion laminating process, when the thermoplastic innermost layer is subjected to extrusion film-forming from a die head of an extruder in a molten state, the phenomenon of necking is greatly reduced, and the phenomenon of wasting of energy and raw materials is greatly inhibited.
Description
Patent application of the present invention is the divisional application that the application name proposed first time based on the applicant is called a kind of application for a patent for invention of laminate wrapping material, and the applying date of original application is on December 31st, 2012, and application number is 201210594098.9.
Technical field
The present invention relates to a kind of laminate wrapping material, particularly relate to a kind of packaging material for packaging liquid food.
Background technology
At present, for the disposable ARTPackaging containers of liquid food, there is brick, square, triangle, cross section is hexagonal octahedral bodily form, the shapes such as pillow-like, the laminate wrapping material of usual these packing containers of manufacture comprises the thermoplastic outermost layer of lamination successively, sandwich layer, thermoplastic intermediate layer, barrier layer, adhesive phase and thermoplastic innermost layer, also low density polyethylene (LDPE) (LDPE)/printing layer of ink/paper (fiber) base layer/LDPE/ aluminium foil AL/LDPE/LDPE adopting high-pressure process to produce is had, LDPE/ prints layer of ink/paper matrix layer/LDPE/LDPE, printing layer of ink/LDPE/ paper matrix layer/LDPE/LDPE, the laminate wrapping material of the sandwich constructions such as layer of ink/paper matrix layer/LDPE/ aluminium/polyester (PET) is printed as LDPE/.The food liquid that these packing containers can be packed has fresh milk, yoghurt, fruit juice etc.
Conventional core material has paper, brown paper or hardboard etc., conventional barrier material has aluminium foil, metal/inorganic oxide film, ethylene-vinyl alcohol copolymer (EVOH), nylon etc., conventional thermoplastic outermost layer, intermediate layer, the low density polyethylene (LDPE) (LDPE) of the useful high-pressure process production of material of innermost layer, LLDPE (LLDPE), by the thermoplastic such as ethyleneα-olefincopolymer (mLLDPE) of metallocene catalyst catalyzed polymerization, conventional adhesive has polyurethane binder, Polyester Polyurethane Adhesive, polyether polyurethane adhesive, acrylic adhesive, polyester binder, polyamide binder, polyvinylacetate adhesive, epoxy adhesive, rubber adhesive etc.
The effect of each layer of packaging material is: thermoplastic outermost layer effectively can stop that extraneous moisture, pollution or other magazines enter in packaging material; Sandwich layer can supporting package container; Thermoplastic intermediate layer and barrier layer can effectively prevent food liquid from entering into sandwich layer, and simultaneously starvation, sunlight make packing container not light leak, air tight, particularly do not leak oxygen, ensure that food liquid taste does not run off; Thermoplastic innermost layer directly contacts with food liquid, while guarantee food liquid quality, prevent food liquid to the infiltration of other each layers of packaging material; Adhesive phase adds the adhesion strength between high containment and thermoplastic innermost layer.
Fig. 1 shows a kind of common method manufacturing laminate wrapping material, machine guiding core layer coiled material 1 moves ahead by the pressure roller of stamping station 2, process the hole needed for packing container opening device and the impression needed for folded wrapping materials, continue to guide the sandwich layer coiled material 11 of perforate forward, arrive laminating bench 5, extruder 3 squeezes out thermoplastic intermediate layer coiled material and guides it to and reaches laminating bench 5 herein, barrier layer coiled material 4 is directed to laminating bench 5 simultaneously, laminating bench 5 pairs of three-layer coil materials carry out lamination, in its roll gap center core layer, thermoplastic intermediate layer and barrier layer are pressed together, and thermoplastic intermediate layer is between sandwich layer and barrier layer, become laminate 111. guide layer pressing plate 111 thus and arrive next stage laminating bench 6, herein by coextruding and coat the opposite side on thermoplastic innermost layer 7 paint laminate 111 barrier layer, in the roll gap of laminating bench 6, laminate 111 and thermoplastic innermost layer 7 are pressed together, form the laminated material 1111 that inner side is coated with thermoplastic innermost layer thus, afterwards by extrusion coated thermoplastic outermost layer on sandwich layer opposite side i.e. outside coating, so far the laminate wrapping material that packing container is used is obtained.Certainly, the outermost coating of thermoplastic might not be placed on final step and carry out, and also can according to circumstances apply in step suitable before.
The packing container of the laminate wrapping material Production and Packaging food liquid that available said method is made.Secondary pollution is suffered in order to prevent packaged food liquid, the production process of whole packing container is all aseptically carried out: be first shaped to by laminate wrapping material cylindric, and form tube in the longitudinal sealing-in of side, then the horizontal sealing-in in tube one end, form top or the bottom of packing container, fill required food liquid afterwards, finally the residue of tube is held horizontal sealing-in, make bottom or the top of packing container.By cutting transverse packed region, single independently packing container can be formed, and by these independently packing container deliver in final folding and shaped device and be converted into net shape, as brick or other shapes.Laminate wrapping material longitudinal sealing, transverse sealing time in formation packing container process can have influence on production efficiency, the qualification rate of intensity effect packing container of longitudinal sealing, transverse sealing and the shelf lives of food liquid.
Chinese invention patent application prospectus CN1337914A discloses a kind of paper container package material, the constituting layer at least comprised has thermoplastic outermost layer, papery base layer, barrier layer and thermoplastic innermost layer and by each constituting layer by said sequence lamination, be characterised in that: thermoplastic innermost layer at least comprises the LLDPE with narrow molecular weight distribution, there is following performance parameter: averag density 0.900-0.915, Peak melting point 88-103 DEG C, melt flow index 5-20, expansion ratio (SR) 1.4-1.6 and thickness 20-50 micron.These packaging material make to be easy to pouring package packing container and rapid heat-seal, obtain the more firm container sealed more by force, this material can be used for the excellent sealing that realizes independent of in-built food temperature and thus maintains the ability that in-built product never degenerates and guarantee the quality, but, this packaging material are in the extruding layer compression technology of manufacture process, serious necking phenomenon can be there is from during the die head film extrusion of extruder in thermoplastic innermost layer in molten condition, namely extrusion die dual-side can to middle shrinkage, even there is the phenomenon of breach in edge thickness inequality, both sides, barrier layer can be made like this to be capped or cladding thickness uneven, flaw is there is in order to prevent finished product packing material, usually three kinds of solutions are had, a kind of is do wider than the width on papery base layer and barrier layer by the die head of extruder, the defective part in extrusion die both sides is not covered on barrier layer, in follow-up lamination operation, cooling forming excises again, another kind is done by the width on papery base layer and barrier layer wider, and after extruding lamination, the flaw part of excision packaging material both sides, obtains qualified packaging material, moreover reduce necking phenomenon infringement by increasing thermoplastic innermost layer thickness.These three kinds of solutions all need many wider than the width on papery base layer and barrier layer of extruder die head, need more heat heating and melting thermoplastic, cause energy waste, and after lamination completes, also will excise the flaw part of packaging material both sides, cause waste of raw materials.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of laminate wrapping material, can rapid heat-seal vertical and horizontal junction surface when packing container made by this material, obtain the packing container that sealing intensity is good, and can not there is serious necking phenomenon when extruding lamination thermoplastic innermost layer in the fabrication process in it, can not cause the serious energy and waste of raw materials.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: a kind of laminate wrapping material, comprise thermoplastic outermost layer, sandwich layer, thermoplastic intermediate layer, barrier layer and thermoplastic innermost layer from outside to inside, wherein, described thermoplastic innermost layer comprises LLDPE (MLLDPE) and the low density polyethylene (LDPE) (LDPE) of metalloscene catalyst polymerization; The LLDPE (mLLDPE) of described metalloscene catalyst polymerization has following parameter: averag density is 0.88g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 130 DEG C, expansion ratio is 1.2 ~ 1.8; Described low density polyethylene (LDPE) (LDPE) has following parameter: averag density is 0.90g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.2 ~ 1.8.
In the present invention, melt flow index according in GB/T3682-2000 melt flow index assay method 190 DEG C, the condition determination of 2.16kg measures.Expansion ratio represents under the condition determination (namely 190 DEG C, 2.16kg) identical with GB/T3682-2000 melt flow index assay method, the cross sectional dimensions of the extrudate of measured depanning and the cross sectional dimensions ratio of die orifice.Peak melting point is obtained by differential scanning calorimetry, if two or more peak value, refers to first peak value.Low density polyethylene (LDPE) (LDPE) can be LLDPE (LLDPE), can be also non-linear low density polyethylene (LDPE), as long as have above-mentioned performance parameter just can meet requirement of the present invention.
One as technique scheme is improved, and wherein, the LLDPE (mLLDPE) of described metalloscene catalyst polymerization has following parameter: averag density is 0.90g/cm
3~ 0.915 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 88 DEG C ~ 120 DEG C, expansion ratio is 1.4 ~ 1.6.
As the further improvement of technique scheme, wherein, the averag density of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 0.905g/cm
3~ 0.910 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
As the further improvement of technique scheme, wherein, described low density polyethylene (LDPE) (LDPE) has following parameter: averag density is 0.910 g/cm
3~ 0.92g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.4 ~ 1.6.
As the further improvement of technique scheme, wherein, the averag density of described low density polyethylene (LDPE) (LDPE) is 0.915 g/cm
3~ 0.920g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
As the further improvement of technique scheme, wherein, the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 50% ~ 80%, and the weight percentage (wt) of described low density polyethylene (LDPE) (LDPE) is 20% ~ 50%.
As the further improvement of technique scheme, wherein, the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 60% ~ 75%, and the weight percentage (wt) of described low density polyethylene (LDPE) (LDPE) is 25% ~ 40%.
As the further improvement of technique scheme, wherein, the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 70%, and the weight percentage (wt) of described low density polyethylene (LDPE) (LDPE) is 30%.
The present invention compared with prior art, thermoplastic innermost layer due to laminate wrapping material have employed the LLDPE (MLLDPE) and low density polyethylene (LDPE) (LDPE) with the polymerization of particular characteristic parameter metalloscene catalyst, in the extruding layer compression technology of manufacture process, thermoplastic innermost layer to obtain from the necking phenomenon during die head film extrusion of extruder in molten condition and largely reduces, the energy and waste of raw materials phenomenon have and largely suppress, and can rapid heat-seal vertical and horizontal junction surface when using laminate wrapping material of the present invention to make packing container, obtain the packing container that sealing intensity is good.
figure of description
Fig. 1 is a kind of schematic diagram manufacturing laminate wrapping material method;
Fig. 2 is the cross sectional representation of a kind of laminate wrapping material of the present invention.
Detailed description of the invention
As shown in Figure 2, a kind of laminate wrapping material of the present invention comprises thermoplastic outermost layer 21, sandwich layer 22, thermoplastic intermediate layer 23, barrier layer 24, adhesive phase 25 and thermoplastic innermost layer 26 from outside to inside successively.
Thermoplastic innermost layer 26 comprises LLDPE (MLLDPE) and the low density polyethylene (LDPE) (LDPE) of metalloscene catalyst polymerization, wherein, the LLDPE (mLLDPE) of metalloscene catalyst polymerization has following parameter: averag density is 0.88g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 130 DEG C, expansion ratio is 1.2 ~ 1.8; Low density polyethylene (LDPE) (LDPE) has following parameter: averag density is 0.90g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.2 ~ 1.8, low density polyethylene (LDPE) (LDPE) can be LLDPE, also can be non-LLDPE.The weight percentage (wt) of the LLDPE (mLLDPE) of metalloscene catalyst polymerization is 50% ~ 80%, and the weight percentage (wt) of low density polyethylene (LDPE) (LDPE) is 20% ~ 50%.
Sandwich layer 22 is the coiled material of paper substrates, after lateral surface printed patterns, crease line is suppressed and after stamping out open hole through indentation roller, thermoplastic outermost layer 21 is formed in the outside of sandwich layer 22 by extruding layer compression technology with low-density polyethylene material, continue to guide the sandwich layer coiled material of impression perforate forward, arrive laminating bench, extruder squeezes out the low-density polyethylene film as thermoplastic intermediate layer 23 herein, aluminum foil coiled material simultaneously as barrier layer 24 is directed to laminating bench, laminating bench carries out lamination compound to trilaminate material, at its roll gap center core layer 22 medial surface, thermoplastic intermediate layer 23 and barrier layer 24 are pressed together, then, form adhesive phase 25 being pressed onto on barrier layer 24 by polyvinylacetate adhesive extruding layer.
With above-mentioned conventional material and extrude the multilayer material that laminating method obtains thermoplastic outermost layer 21/ sandwich layer 22/ thermoplastic intermediate layer 23/ aluminium foil layer 24/ adhesive phase 25, then LLDPE (mLLDPE) and the low density polyethylene (LDPE) of distinguishing the blended metalloscene catalyst polymerization of weight percentage (wt) according to the form below 1 obtain blend, respectively with thickness for 20, 22, 25, the adhesive phase 25 that the blend extruding layer of 30 microns is pressed onto this multilayer material forms thermoplastic innermost layer 26, when this blend extrudes formation film from extruder die orifice, film both sides do not form breach, edge thickness is substantially even, dual-side can be very little to middle shrinkage, it is even that these multilayer material both sides are capped thickness, the laminate wrapping material obtained is on bottle placer in pouring in liquid food products, reliably can complete packing container longitudinal sealing fast, transverse sealing, the qualification rate of the packing container made is high, the shelf lives of food liquid is long.
The LLDPE (mLLDPE) of blended metalloscene catalyst polymerization and low density polyethylene (LDPE) obtains blend time, can adopt and the particle Direct Uniform of both materials is mixed, also can adopt by bi-material mix after again melting stir, carry out granulation again and obtain blend particle, the mixture homogeneity of rear a kind of mode is better than front one.
Adhesive phase 25 and thermoplastic innermost layer 26 can adopt two-layer co-extrusion mode to be laminated on the aluminium foil on barrier layer 24, like this can Simplified flowsheet, and adhesive phase 25 and thermoplastic innermost layer 26 inter-layer bonding force good.
Table 1:
Claims (8)
1. a laminate wrapping material, comprise thermoplastic outermost layer (21), sandwich layer (22), thermoplastic intermediate layer (23), barrier layer (24) and thermoplastic innermost layer (26) from outside to inside, it is characterized in that: described thermoplastic innermost layer (26) comprises LLDPE (MLLDPE) and the LLDPE (LLDPE) of metalloscene catalyst polymerization;
The LLDPE (mLLDPE) of described metalloscene catalyst polymerization has following parameter: averag density is 0.88g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 130 DEG C, expansion ratio is 1.2 ~ 1.8;
Described LLDPE (LLDPE) has following parameter: averag density is 0.90g/cm
3~ 0.925 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.2 ~ 1.8.
2. a kind of laminate wrapping material according to claim 1, is characterized in that: the LLDPE (mLLDPE) of described metalloscene catalyst polymerization has following parameter: averag density is 0.90g/cm
3~ 0.915 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 88 DEG C ~ 120 DEG C, expansion ratio is 1.4 ~ 1.6.
3. a kind of laminate wrapping material according to claim 1, is characterized in that: the averag density of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 0.905g/cm
3~ 0.910 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
4. a kind of laminate wrapping material according to claim 1, is characterized in that: described LLDPE (LLDPE) has following parameter: averag density is 0.910 g/cm
3~ 0.92g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.4 ~ 1.6.
5. a kind of laminate wrapping material according to claim 4, is characterized in that: the averag density of described LLDPE (LLDPE) is 0.915 g/cm
3~ 0.920g/cm
3, melt flow index (190 DEG C, 2.16kg) is 5 g/10min ~ 20 g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
6. a kind of laminate wrapping material according to any one of claim 1 to 5, it is characterized in that: the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 50% ~ 80%, and the weight percentage (wt) of described LLDPE (LLDPE) is 20% ~ 50%.
7. a kind of laminate wrapping material according to any one of claim 1 to 5, it is characterized in that: the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 60% ~ 75%, and the weight percentage (wt) of described LLDPE (LLDPE) is 25% ~ 40%.
8. a kind of laminate wrapping material according to any one of claim 1 to 5, it is characterized in that: the weight percentage (wt) of the LLDPE (mLLDPE) of described metalloscene catalyst polymerization is 70%, and the weight percentage (wt) of described LLDPE (LLDPE) is 30%.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210594098.9A CN103029398B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210594098.9A Division CN103029398B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104760383A true CN104760383A (en) | 2015-07-08 |
Family
ID=48017032
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156824.2A Withdrawn CN104760383A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156779.0A Withdrawn CN104760382A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201210594098.9A Ceased CN103029398B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156815.3A Withdrawn CN104760352A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156814.9A Withdrawn CN104742474A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156779.0A Withdrawn CN104760382A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201210594098.9A Ceased CN103029398B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156815.3A Withdrawn CN104760352A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156814.9A Withdrawn CN104742474A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN104760383A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104999757A (en) * | 2015-08-04 | 2015-10-28 | 厉善君 | Aseptic packaging material and aseptic packaging container for edible liquor |
| CN116198196A (en) * | 2023-03-21 | 2023-06-02 | 合肥联宝信息技术有限公司 | Composite board, manufacturing method and device thereof and packaging cotton structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148895A (en) * | 1993-11-30 | 1995-06-13 | Dainippon Printing Co Ltd | Paper container |
| CN1337914A (en) * | 1999-01-27 | 2002-02-27 | 泰特拉-勒维尔金融控股公司 | Laminated packaging material for paper container |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0655485B2 (en) * | 1990-12-20 | 1994-07-27 | ウェストヴァコ コーポレイション | Paperboard container and manufacturing method thereof |
| JP4879377B2 (en) * | 1998-12-08 | 2012-02-22 | 大日本印刷株式会社 | Transparent barrier film, laminated material using the same, and packaging container |
| US20060188678A1 (en) * | 2005-02-21 | 2006-08-24 | Ohlsson Stefan B | Multi-layer polyethylene films |
| SE529099C2 (en) * | 2005-09-15 | 2007-05-02 | Tetra Laval Holdings & Finance | Sealing strip and a packaging container comprising such a strip |
-
2012
- 2012-12-31 CN CN201510156824.2A patent/CN104760383A/en not_active Withdrawn
- 2012-12-31 CN CN201510156779.0A patent/CN104760382A/en not_active Withdrawn
- 2012-12-31 CN CN201210594098.9A patent/CN103029398B/en not_active Ceased
- 2012-12-31 CN CN201510156815.3A patent/CN104760352A/en not_active Withdrawn
- 2012-12-31 CN CN201510156814.9A patent/CN104742474A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148895A (en) * | 1993-11-30 | 1995-06-13 | Dainippon Printing Co Ltd | Paper container |
| CN1337914A (en) * | 1999-01-27 | 2002-02-27 | 泰特拉-勒维尔金融控股公司 | Laminated packaging material for paper container |
Non-Patent Citations (1)
| Title |
|---|
| 国家质量技术监督局: "《中华人民共和国国家标准 GB/T 1845.1-1999》", 10 August 1999 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104760382A (en) | 2015-07-08 |
| CN103029398B (en) | 2015-04-08 |
| CN104760352A (en) | 2015-07-08 |
| CN104742474A (en) | 2015-07-01 |
| CN103029398A (en) | 2013-04-10 |
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