CN104760380A - Method for manufacturing laminated packaging material - Google Patents
Method for manufacturing laminated packaging material Download PDFInfo
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- CN104760380A CN104760380A CN201510156917.5A CN201510156917A CN104760380A CN 104760380 A CN104760380 A CN 104760380A CN 201510156917 A CN201510156917 A CN 201510156917A CN 104760380 A CN104760380 A CN 104760380A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000005022 packaging material Substances 0.000 title abstract description 10
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 62
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 62
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 49
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 49
- 238000002844 melting Methods 0.000 claims abstract description 22
- 230000008018 melting Effects 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims description 50
- 238000006116 polymerization reaction Methods 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 claims description 20
- 239000000853 adhesive Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 238000003475 lamination Methods 0.000 claims description 16
- 239000010410 layer Substances 0.000 abstract description 102
- 238000010030 laminating Methods 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 abstract description 7
- 239000012792 core layer Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000012968 metallocene catalyst Substances 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract description 2
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 abstract 2
- 239000000155 melt Substances 0.000 abstract 2
- 239000012815 thermoplastic material Substances 0.000 abstract 2
- 238000002156 mixing Methods 0.000 abstract 1
- 238000004080 punching Methods 0.000 abstract 1
- 229920001684 low density polyethylene Polymers 0.000 description 43
- 239000004702 low-density polyethylene Substances 0.000 description 43
- 238000012856 packing Methods 0.000 description 23
- 235000013305 food Nutrition 0.000 description 12
- 239000007788 liquid Substances 0.000 description 12
- 238000007789 sealing Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000005030 aluminium foil Substances 0.000 description 3
- 235000021056 liquid food Nutrition 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 235000015203 fruit juice Nutrition 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 229920001526 metallocene linear low density polyethylene Polymers 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 235000021485 packed food Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 235000013618 yogurt Nutrition 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
The invention relates to a method for manufacturing a laminated packaging material. The method comprises the steps of pressing a core layer to form fold lines, punching the core layer to form opening holes, laminating a thermoplastic material to the outer side face of the core layer through extruding so as to form an outermost layer, and blending metallocene catalyst polymerized linear low-density polyethylene (LLDPE) and linear low-density polyethylene (LLDPE), so as to form an outermost thermoplastic material, wherein 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. When the thermoplastic outermost 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 201210594765.3.
Technical field
The present invention relates to a kind of method manufacturing laminate wrapping material, particularly relate to the method for a kind of manufacture for the laminate wrapping material of 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, and being formed in packing container process with thermoplastic innermost layer longitudinal sealing at laminate wrapping material is that laminate wrapping material forms tubulose; 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, each constituting layer is also pressed said sequence lamination by barrier layer and thermoplastic innermost layer, 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, thermoplastic outermost layer also adopts the material identical with aforementioned innermost layer to make.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 outermost layer in molten condition, namely extrusion die dual-side can to middle shrinkage, even there is the phenomenon of breach in edge thickness inequality, papery base layer both sides 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 made not cover on papery base 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 outermost 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 method manufacturing laminate wrapping material, serious necking phenomenon can not be there is when extruding lamination thermoplastic outermost layer in the fabrication process, the serious energy and waste of raw materials can not be caused, and the laminate wrapping material of the method manufacture longitudinal seal energy rapid heat-seal when making packing container, obtain the packing container that sealing intensity is good.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: a kind of method manufacturing laminate wrapping material, comprises the steps:
Step 1, suppresses crease line at sandwich layer and stamps out open hole;
Step 2, sandwich layer lateral surface is extruded lamination thermoplastic and forms outermost layer;
Step 3, sandwich layer medial surface is extruded lamination thermoplastic and forms intermediate layer, barrier layer is compounded on sandwich layer medial surface by intermediate layer simultaneously;
Step 4, extrudes lamination thermoplastic over the barrier layer and forms adhesive phase;
Step 5, extrudes lamination thermoplastic over the binder layer and forms innermost layer;
In step 2 above, LLDPE (mLLDPE) and the LLDPE (LLDPE) of blended metalloscene catalyst polymerization form described outermost thermoplastic, wherein, 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.
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 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.
As the further improvement of technique scheme, wherein, 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.
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 LLDPE (LLDPE) 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 LLDPE (LLDPE) 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 LLDPE (LLDPE) is 30%.
The present invention compared with prior art, the thermoplastic outermost layer of the laminate wrapping material using the inventive method to produce have employed the LLDPE (mLLDPE) and LLDPE (LLDPE) with the polymerization of particular characteristic parameter metalloscene catalyst, in the extruding layer compression technology of manufacture process, thermoplastic outermost 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 longitudinal seal energy rapid heat-seal in process when using the laminate wrapping material of the inventive method manufacture to make packing container, obtain the packing container that sealing intensity is good, the packing container qualification rate made is high, the shelf lives of food liquid is long.
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 outermost layer 21 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, 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 8, 10, 15, the blend extruding layer of 20 microns is pressed onto on papery sandwich layer 21 lateral surface and forms thermoplastic outermost layer 21, 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.
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, be pressed together on its roll gap center core layer 22 medial surface, thermoplastic intermediate layer 23 and barrier layer 24, then, adhesive phase 25 is formed being pressed onto on barrier layer 24 by polyvinylacetate adhesive extruding layer.
Then the LLDPE (mLLDPE) of blended metalloscene catalyst polymerization and low density polyethylene (LDPE) obtain blend, wherein, the LLDPE (mLLDPE) of metalloscene catalyst polymerization has following parameter: averag density is 0.910 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 13 g/10min, Peak melting point is 124 DEG C, expansion ratio is 1.5; Low density polyethylene (LDPE) (LDPE) has following parameter: averag density is 0.918 g/cm
3, melt flow index (190 DEG C, 2.16kg) is 7 g/10min, Peak melting point is 107 DEG C, expansion ratio is 1.6, and the adhesive phase 25 that the blend extruding layer being 22 microns with thickness is pressed onto this multilayer material forms thermoplastic innermost layer 26.
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.
The laminate wrapping material obtained in pouring in liquid food products, reliably can complete packing container longitudinal sealing, transverse sealing fast on bottle placer, and the packing container qualification rate made is high, and the shelf lives of food liquid is long.
Table 1:
Claims (8)
1. manufacture a method for laminate wrapping material, comprise the steps:
Step 1, suppresses crease line at sandwich layer (22) and stamps out open hole;
Step 2, sandwich layer (22) lateral surface is extruded lamination thermoplastic and forms outermost layer (21);
Step 3, sandwich layer (22) medial surface is extruded lamination thermoplastic and forms intermediate layer (23), barrier layer (24) are compounded on sandwich layer (22) medial surface by intermediate layer (23) simultaneously;
Step 4, barrier layer (24) extrudes lamination thermoplastic and forms adhesive phase (25);
Step 5, adhesive phase (25) is extruded lamination thermoplastic and forms innermost layer (26);
In step 2 above, the LLDPE (mLLDPE) of blended metalloscene catalyst polymerization and LLDPE (LLDPE) form the thermoplastic of described outermost layer (21), wherein,
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 (condition determination be 190 DEG C, 2.16kg) is 5g/10min ~ 20g/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~ 0.925g/cm
3, melt flow index (condition determination be 190 DEG C, 2.16kg) is 5g/10min ~ 20g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.2 ~ 1.8.
2. a kind of method manufacturing 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 (condition determination be 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 method manufacturing 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 (condition determination be 190 DEG C, 2.16kg) is 5g/10min ~ 20g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
4. a kind of method manufacturing laminate wrapping material according to claim 1, is characterized in that: described LLDPE (LLDPE) has following parameter: averag density is 0.910g/cm
3~ 0.92g/cm
3, melt flow index (condition determination be 190 DEG C, 2.16kg) is 5g/10min ~ 20g/10min, Peak melting point is 85 DEG C ~ 110 DEG C, expansion ratio is 1.4 ~ 1.6.
5. a kind of method manufacturing laminate wrapping material according to claim 4, is characterized in that: the averag density of described LLDPE (LLDPE) is 0.915g/cm
3~ 0.920g/cm
3, melt flow index (condition determination be 190 DEG C, 2.16kg) is 5g/10min ~ 20g/10min, Peak melting point is 93 DEG C ~ 103 DEG C, expansion ratio is 1.4 ~ 1.6.
6. a kind of method manufacturing 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 method manufacturing 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 method manufacturing 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 |
|---|---|---|---|
| CN201210594765.3A CN103101274B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210594765.3A Division CN103101274B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104760380A true CN104760380A (en) | 2015-07-08 |
Family
ID=48309630
Family Applications (9)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156921.1A Withdrawn CN104760384A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201210594765.3A Ceased CN103101274B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156782.2A Withdrawn CN104742439A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
| CN201510156918.XA Withdrawn CN104760392A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201510156922.6A Withdrawn CN104760393A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201510156793.0A Withdrawn CN104742473A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
| CN201510156830.8A Withdrawn CN104760375A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156917.5A Withdrawn CN104760380A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201510156817.2A Withdrawn CN104760378A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Family Applications Before (7)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156921.1A Withdrawn CN104760384A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201210594765.3A Ceased CN103101274B (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
| CN201510156782.2A Withdrawn CN104742439A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
| CN201510156918.XA Withdrawn CN104760392A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201510156922.6A Withdrawn CN104760393A (en) | 2012-12-31 | 2012-12-31 | Method for manufacturing laminated packaging material |
| CN201510156793.0A Withdrawn CN104742473A (en) | 2012-12-31 | 2012-12-31 | Laminated package material |
| CN201510156830.8A Withdrawn CN104760375A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510156817.2A Withdrawn CN104760378A (en) | 2012-12-31 | 2012-12-31 | Laminated packaging material |
Country Status (1)
| Country | Link |
|---|---|
| CN (9) | CN104760384A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10513096B2 (en) * | 2016-01-07 | 2019-12-24 | Essel Propack Limited | Laminate for vignette and tonal image printing |
| CN115491146B (en) * | 2022-02-21 | 2023-12-12 | 广东东立新材料科技股份有限公司 | Ultrahigh temperature-resistant plastic-suction forming protective film and preparation method thereof |
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 |
| SE522498C2 (en) * | 2002-05-07 | 2004-02-10 | Tetra Laval Holdings & Finance | Packaging laminate, method of manufacture thereof, and packaging container made of packaging laminate |
| CN101823355B (en) * | 2009-03-03 | 2013-09-25 | E.I.内穆尔杜邦公司 | Polymer laminated film and solar panel using laminated film |
-
2012
- 2012-12-31 CN CN201510156921.1A patent/CN104760384A/en not_active Withdrawn
- 2012-12-31 CN CN201210594765.3A patent/CN103101274B/en not_active Ceased
- 2012-12-31 CN CN201510156782.2A patent/CN104742439A/en not_active Withdrawn
- 2012-12-31 CN CN201510156918.XA patent/CN104760392A/en not_active Withdrawn
- 2012-12-31 CN CN201510156922.6A patent/CN104760393A/en not_active Withdrawn
- 2012-12-31 CN CN201510156793.0A patent/CN104742473A/en not_active Withdrawn
- 2012-12-31 CN CN201510156830.8A patent/CN104760375A/en not_active Withdrawn
- 2012-12-31 CN CN201510156917.5A patent/CN104760380A/en not_active Withdrawn
- 2012-12-31 CN CN201510156817.2A patent/CN104760378A/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 |
|---|---|
| CN103101274B (en) | 2015-04-08 |
| CN104742439A (en) | 2015-07-01 |
| CN104760393A (en) | 2015-07-08 |
| CN103101274A (en) | 2013-05-15 |
| CN104760392A (en) | 2015-07-08 |
| CN104760375A (en) | 2015-07-08 |
| CN104742473A (en) | 2015-07-01 |
| CN104760378A (en) | 2015-07-08 |
| CN104760384A (en) | 2015-07-08 |
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Application publication date: 20150708 |