CN110039694A - Mould internal standard preparation process and its mould internal standard - Google Patents
Mould internal standard preparation process and its mould internal standard Download PDFInfo
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- CN110039694A CN110039694A CN201910285701.7A CN201910285701A CN110039694A CN 110039694 A CN110039694 A CN 110039694A CN 201910285701 A CN201910285701 A CN 201910285701A CN 110039694 A CN110039694 A CN 110039694A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000010410 layer Substances 0.000 claims abstract description 144
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 238000002844 melting Methods 0.000 claims abstract description 43
- 230000008018 melting Effects 0.000 claims abstract description 43
- 239000011241 protective layer Substances 0.000 claims abstract description 39
- 150000001875 compounds Chemical class 0.000 claims abstract description 37
- 238000010030 laminating Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 35
- 238000000576 coating method Methods 0.000 claims description 34
- 239000011248 coating agent Substances 0.000 claims description 32
- 239000004698 Polyethylene Substances 0.000 claims description 19
- 239000000498 cooling water Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- -1 polyethylene Polymers 0.000 claims description 16
- 229920000573 polyethylene Polymers 0.000 claims description 16
- 229920001903 high density polyethylene Polymers 0.000 claims description 12
- 239000004700 high-density polyethylene Substances 0.000 claims description 12
- 229920001684 low density polyethylene Polymers 0.000 claims description 12
- 239000004702 low-density polyethylene Substances 0.000 claims description 12
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 11
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 238000004049 embossing Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000003851 corona treatment Methods 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 4
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 4
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229920002799 BoPET Polymers 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 239000010408 film Substances 0.000 claims 3
- 239000010409 thin film Substances 0.000 claims 1
- 239000012752 auxiliary agent Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000003912 environmental pollution Methods 0.000 abstract description 4
- 238000003475 lamination Methods 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000005215 recombination Methods 0.000 description 5
- 230000006798 recombination Effects 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 4
- 229920002873 Polyethylenimine Polymers 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 4
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 235000010354 butylated hydroxytoluene Nutrition 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000002789 length control Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000008601 oleoresin Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/20—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. moulding inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/22—Making multilayered or multicoloured articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/02—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The technical program discloses mould internal standard preparation process and its mould internal standard, and the mould internal standard preparation process includes protective layer and substrate layer is compound, melting layer and substrate layer are compound；The mould internal standard includes substrate layer, protective layer, melting layer; the substrate layer is printed on the one side of pattern identification for front; the another side of the substrate layer is reverse side, and the protective layer is arranged on the front of the substrate layer, and the melting layer is arranged on the reverse side of the substrate layer；The preparation process signed in the film is completed in a two-sided laminating machine, it eliminates excessive process while also eliminating most auxiliary agents, thus greatly reduce manufacturing cost, it plays energy-saving and emission-reduction and reduces environmental pollution, process is simple and mature, strong operability, and the comprehensive performance of its weather resistance and product increases than prior art.
Description
Technical field
The invention belongs to label/in-mold labels technical fields, in particular to mould internal standard preparation process and its mould internal standard.
Background technique
Mould internal standard refers to that pre-printed paper, synthetic or thin sumptuous label, the back side are coated with special melt viscosity
Agent is placed on inside model, to generate plastic bottle or basin before plastic blown, injection molding or thermoforming.Label and bottle body are substantially same
In one plane, the edge of label is not seen, and just looking like is figure to be printed directly on bottle body surface equally.
Currently, mould internal standard is mostly to be combined together target multilayer material in mould using the mode of coating, the painting of coating
Material is mostly adhesive, and the hot melt layer material especially in conjunction with plastic containers is mostly EVA (ethylene-vinyl acetate copolymer) thermosol
Glue, EVA thermosol is hot melt adhesive more environmentally friendly at present, but EVA hot-melt adhesive is easy to oxidize during heating, therefore,
Such as oxidant BHT (2,6 di tert butyl 4 methyl phenol), thickening terpene resin and stone can be added during manufacture hot melt adhesive
The auxiliary agents such as oleoresin (C9), dibutyl phthalate, these auxiliary agents are in the production process of EVA hot-melt adhesive
It is not involved in key reaction, only the excessive oxidation in compensation EVA during heating, therefore these auxiliary agents increase life
The production cost of enterprise is produced, and these auxiliary agents also can cause environmental pollution in the fabrication process, be added in addition
Above-mentioned auxiliary agents can make target preparation process complexity in mould, cause energy consumption and human cost to increase, although once in a while one
It adds said components in the middle part of a little manufacture mould internal standards, but in order to enable each layer structure in mould internal standard is firmly combined, can also add
The addition of epoxy resin, polyurethane, methacrylate, hydroxyethyl cellulose etc., these materials equally will increase manufacturing cost
And cause environmental pollution.
Summary of the invention
For overcome the deficiencies in the prior art, the technical program is designed to provide mould internal standard and its preparation process, institute
It states and eliminates auxiliary agents in mould in target raw material, preparation process eliminated multi-process.
To solve the above problems, the technical program adopts the following technical solutions:
Target preparation process in mould, comprising the following steps:
The preparation of the coating material of protective layer: be 1 by mass ratio: the high density polyethylene (HDPE) and low density polyethylene (LDPE) of (1~2) are mixed
It closes uniformly, obtains polyethylene mixture, and polyethylene mixture is subjected to hot air type drying；
Protective layer is compound with substrate layer: the front of the substrate layer is the one side that substrate layer is printed on icon indicia, the base
The another side of material layer is reverse side；It is fitted into laminating machine with by substrate layer, and makes front and the first spiral shell of laminating machine of substrate layer
The extrusion material mouth of cylinder is corresponding；The polyethylene mixture prepared is packed into the first barrel of extruder, and first spiral shell is set
The polyethylene mixture is carried out melt process by the temperature of cylinder；Wherein the first barrel pressure is 5Mpa~15Mpa, coating die
Head temperature is 315 ± 20 DEG C, the polyethylene mixture is coated on the front of the substrate layer, to form protective layer；
And during coating, while combined wheels are used, protective layer and substrate layer are pressed；
Melting layer is compound with substrate layer: after ethylene-vinyl acetate resin is dried, flowing directly into laminating machine
The extrusion material mouth of second barrel, the second barrel of the laminating machine corresponds to the reverse side of substrate layer；The temperature of second barrel is set
Degree carries out heating and melting to ethylene-vinyl acetate resin, and the second barrel pressure is 5Mpa~15Mpa, and the temperature of coating die head is
240 ± 10 DEG C, the reverse side of the substrate layer is coated, to form melting layer；And during coating, make simultaneously
It is taken turns with embossing, melting layer and substrate layer is pressed；
Protective layer and substrate layer is compound, melting layer and substrate layer compound tense influence the important step of label quality in the film,
Pressure force is mainly to be generated by cylinder, and the size of pressure force can be adjusted by adjusting the pressure of cylinders compressing air,
Pressing time mainly passes through the tangent line length control of rubber roller, and the tangent line length of rubber roller is the same as rubber hardness and cylinder pressure
Power is related；During protective layer and substrate are compound and melting layer is compound with substrate layer, the pressure of combined wheels used and embossing wheel
Resultant force is 6~9kg/cm2, pressing time is 0.02~0.03s.
Further, in protective layer and the compound step of substrate layer, cooling water, cooling water are connected in combined wheels used
Temperature is 20~30 DEG C；Coolant-temperature gage is controlled using the surface temperature of wheel face as control point, and wheel face temperature should be controlled at 30~40 DEG C, such as
After the excessively high meeting of fruit wheel face temperature is so that protective layer and substrate layer are compound, the material of protective layer generates cloudy surface and influences the transparency, such as
Fruit wheel face temperature is too low, will affect compound inter-layer bonding force, be easy to cause lamination；
Further, in melting layer and the compound step of substrate layer, cooling water, coolant water temperature are connected in the embossing wheel
Degree is 20~30 DEG C；Cooling water temperature is related with environment temperature and relative humidity, and coolant-temperature gage control is with the surface temperature of wheel face
Control point, wheel face temperature should be controlled at 35~45 DEG C, because wheel face temperature is too low to have negative influence to the intensity of compound interlayer,
It is be easy to cause lamination, and wheel face temperature is excessively high, and composite membrane can be made to generate cloudy surface, it should be as far as possible when meeting mist degree
Temperature is improved, this has positive help to the bond strength for improving interlayer；
Before substrate layer is that protective layer, melting layer are compound, substrate layer material is needed by sided corona treatment, sufficiently to improve
The surface tension of its material, substrate layer material after sided corona treatment, surface tension need to meet PP, PE >=40 up to grace/
Centimetre, PET >=52 up to grace/centimetre, sided corona treatment must on-line synchronous, influenced to avoid the surface tension of material because of timeliness
Composite effect, the detailed process of sided corona treatment are as follows: substrate layer is placed under corona machine and is handled, wherein the power of corona machine is 0.3
~1.0W/m2。
When the intensity of substrate layer material therefor cannot reach combined strength bination, such as when using PET material as substrate layer, then
Before substrate layer and protective layer are compound, need to carry out adhesive layer coating process, detailed process are as follows: the bonding to substrate layer
The coating dry measure of agent is 0.01~0.3g/m2, be 70~90 DEG C in temperature after the completion of coating and be dried, drying time
For 2~4s；When being wherein coated with adhesive layer, gravure web coatable can be used, the mesh number of coating notch board used can be according to coating weight
It determines, generally may be selected in 70~100 mesh, and under fixed mesh number, can be modified by adjusting the concentration of coating fluid.
In the adhesive layer coating process, adhesive therefor is AC agent, and AC agent used is aqua type polyethyleneimine bottom
One of methanol, ethyl alcohol, isopropanol, water can be used or a variety of for solvent in paint dry type complexing agent.
Mould internal standard, including substrate layer, protective layer, melting layer, the substrate layer are printed on the one side of pattern identification for front, institute
The another side for stating substrate layer is reverse side, and the protective layer is arranged on the front of the substrate layer, and the melting layer is arranged in institute
It states on the reverse side of substrate layer.
Further, the substrate layer is BOPP film, BOPP foam films, PP film, PE film or PET film；It is described
Protective layer is polyethylene layer；The melting layer is ethylene-vinyl acetate copolymer layer.
Further, the melting layer is equipped with embossed lines, and the embossed lines are 15~30 μ, and line-spacing is 0.4~2mm.
The technical program has the beneficial effect that the mould internal standard structure is simple, and without using such as antioxidant BHT (2,
6- di-tert-butyl-4-methy phenol), tackifying resin terpene resin and Petropols (C9), dibutyl phthalate etc. it is complementary
Material, therefore label are more friendly to environment in film described in the technical program, and significantly reduce being produced into for producer
This；Melting layer in conventional film in label is through adhesive layer in conjunction with substrate layer, and the combination effect of that melting layer and substrate layer is complete
Adhesive layer between leaning on guarantees, but this structure is easy to appear lamination, to influence the quality signed in film；And this technology
Melting layer in film described in scheme in label is directly merged with substrate layer, and melting layer is thus kept away with the direct fusion connection of substrate
The generation of lamination is exempted from, to ensure that the quality signed in film；
The preparation process signed in film described in the technical program is completed in a two-sided laminating machine, is eliminated excessive
Process simultaneously also eliminate most auxiliary agents, thus greatly reduce manufacturing cost, play energy-saving and emission-reduction and
It reduces environmental pollution, process is simple and mature, strong operability, and the comprehensive performance of its weather resistance and product is than existing work
Skill increases.
Specific embodiment
Embodiment 1
Label in film, including substrate layer, protective layer, melting layer, the substrate layer are printed on the one side of pattern identification for front, institute
The another side for stating substrate layer is reverse side, and the protective layer is arranged on the front of the substrate layer, and the melting layer is arranged in institute
It states on the reverse side of substrate layer；Melting layer is stated equipped with embossed lines, the embossed lines are 15~30 μ, and line-spacing is 0.4~2mm；Wherein
Substrate layer material therefor is PP material；The protective layer material therefor is the mixing of high density polyethylene (HDPE) and low density polyethylene (LDPE)
Material；The melting layer material therefor is ethene-vinyl acetate.
The preparation process signed in above-mentioned film are as follows:
The preparation of the coating material of protective layer: mass ratio is mixed for 1: 1 high density polyethylene (HDPE) and low density polyethylene (LDPE)
It is even, polyethylene mixture is obtained, and polyethylene mixture is subjected to hot air type drying, and be loaded into the first barrel of extruder
In；
After equally by ethene-vinyl acetate by hot air type drying, it is loaded into the second barrel of extruder；By substrate
Layer bumps against the unreeling on platform of laminating machine, is printed on the extrusion material mouth of corresponding first barrel of one side of icon indicia；Pattern-free label
The extrusion material mouth of the second barrel is corresponded on one side；
After having loaded substrate layer, temperature, pressure and the coating die head temperature of the first barrel and the second barrel are adjusted, by first
Barrel heating zone is set as 5 regions, and 5 regional temperatures are followed successively by 220 ± 20 DEG C/250 ± 20 DEG C/275 ± 20 DEG C/300
± 20 DEG C/310 ± 20 DEG C, wherein being kneaded bridge formation section temperature is 300 DEG C, being kneaded the time of building bridge is 5s, the pressure of first barrel
Power is 5Mpa~15Mpa, and the coating die head temperature of corresponding first barrel is 315 ± 20 DEG C；
Set 5 regions for the second barrel heating zone, 5 regional temperatures be followed successively by 220 ± 20 DEG C/250 ± 20 DEG C/
275 ± 20 DEG C/300 ± 20 DEG C/310 ± 20 DEG C, wherein being kneaded bridge formation section temperature is 200 DEG C, it is kneaded the time 4s that builds bridge, described the
The pressure of two barrels is 5Mpa~15Mpa, and the coating die head temperature of corresponding second barrel is 240 ± 10 DEG C；
After the first barrel, the second barrel and die head temperature reach requirement, start lamination machine host, it is multiple into machine lamination at a slow speed
It closes, wherein protective layer and substrate layer compound tense, combined wheels pressure used is 6~9kg/cm2, recombination velocity is 80~100m/
min；Melting layer and substrate layer compound tense, combined wheels pressure used are 6~9kg/cm2, recombination velocity is 80~100m/min；?
Corona machine is started while lamination is compound and by the power adjustment of corona machine to 0.5W/m2, open the cooling cycle system of combined wheels
System, wherein being connected with cooling water in combined wheels used in protective layer and substrate layer are compound, cooling water temperature is 20~30 DEG C,
Coolant-temperature gage is controlled using the surface temperature of wheel face as control point, and wheel face temperature should be controlled at 30~40 DEG C；Melting layer and substrate layer are multiple
It closes, combined wheels used are embossing wheel, and cooling water is connected in the embossing wheel, and cooling water temperature is 20~30 DEG C, coolant water temperature
Degree is related with environment temperature and relative humidity, and coolant-temperature gage is controlled using the surface temperature of wheel face as control point, and wheel face temperature should control
At 35~45 DEG C；When in recombination process, need to monitor the film surface temperature of the wheel face temperature of combined wheels, the substrate layer of compound outlet
And it is compound after surface transparency, the cooling water temperature in time update combined wheels.
Embodiment 2
Mould internal standard, including substrate layer, protective layer, melting layer, the substrate layer are printed on the one side of pattern identification for front, institute
The another side for stating substrate layer is reverse side, and the protective layer is arranged on the front of the substrate layer, and the melting layer is arranged in institute
It states on the reverse side of substrate layer.
Further, the substrate layer material therefor is PET material；The protective layer material therefor is high density polyethylene (HDPE)
With the mixture of low density polyethylene (LDPE)；The melting layer material therefor is ethene-vinyl acetate.
The mould internal standard further includes adhesive layer, and the adhesive layer is arranged between the protective layer and substrate layer, described viscous
Conjunction layer is polyethyleneimine aqueous solution.
The preparation process signed in above-mentioned film are as follows:
The preparation of the coating material of protective layer: mass ratio is mixed for 1: 1 high density polyethylene (HDPE) and low density polyethylene (LDPE)
It is even, polyethylene mixture is obtained, and polyethylene mixture is subjected to hot air type drying, and be loaded into the first barrel of extruder
In；
After equally by ethene-vinyl acetate by hot air type drying, it is loaded into the second barrel of extruder；
Substrate layer is bumped against into the unreeling on platform of laminating machine, is printed on the extruded stock of corresponding first barrel of one side of icon indicia
Mouthful；The extrusion material mouth of corresponding second barrel of the one side of pattern-free label；
After having loaded substrate layer, temperature, pressure and the coating die head temperature of the first barrel and the second barrel are adjusted, by first
Barrel heating zone is set as 5 regions, and 5 regional temperatures are followed successively by 220 ± 20 DEG C/250 ± 20 DEG C/275 ± 20 DEG C/300
± 20 DEG C/310 ± 20 DEG C, wherein being kneaded bridge formation section temperature is 300 DEG C, being kneaded the time of building bridge is 5s, the pressure of first barrel
Power is 5Mpa~15Mpa, and the coating die head temperature of corresponding first barrel is 315 ± 20 DEG C；
Set 5 regions for the second barrel heating zone, 5 regional temperatures be followed successively by 220 ± 20 DEG C/250 ± 20 DEG C/
275 ± 20 DEG C/300 ± 20 DEG C/310 ± 20 DEG C, wherein being kneaded bridge formation section temperature is 200 DEG C, it is kneaded the time 4s that builds bridge, described the
The pressure of two barrels is 5Mpa~15Mpa, and the coating die head temperature of corresponding second barrel is 240 ± 10 DEG C；
By aqua type polyethyleneimine silane coupling agent dry type complexing agent and ethyl alcohol, water by concentration 1wt% (with polyethyleneimine
Agent) allotment bonding coating, it is placed after bonding coating is deployed in female coating bath corresponding with laminating machine, to substrate
Layer carries out adhesive layer coating, opens drying oven, and set temperature is 85 DEG C；
After the first barrel, the second barrel, die head temperature and drying oven temperature reach requirement, start lamination machine host,
The scraper for adjusting coating simultaneously makes bonding coating be uniformly distributed and be coated on substrate layer；It is compound into machine lamination at a slow speed, wherein
Protective layer and substrate layer compound tense, combined wheels pressure used are 6~9kg/cm2, recombination velocity is 80~100m/min；Melting layer
With substrate layer compound tense, combined wheels pressure used is 6~9kg/cm2, recombination velocity is 80~100m/min；It is compound in lamination
Corona machine is started simultaneously and by the power adjustment of corona machine to 0.5W/m2, the cooling recirculation system of combined wheels is opened, wherein protecting
Sheath and substrate layer it is compound in, be connected with cooling water in combined wheels used, cooling water temperature is 20~30 DEG C, coolant-temperature gage control with
The surface temperature of wheel face is control point, and wheel face temperature should be controlled at 30~40 DEG C；Melting layer is compound with substrate layer, and used is compound
Wheel is embossing wheel, and cooling water is connected in embossing wheel, and cooling water temperature is 20~30 DEG C, cooling water temperature and environment temperature and
Relative humidity is related, and coolant-temperature gage is controlled using the surface temperature of wheel face as control point, and wheel face temperature should be controlled at 35~45 DEG C；Multiple
When during conjunction, need to monitor the wheel face temperature of combined wheels, the substrate layer of compound outlet film surface temperature and it is compound after surface
Transparency, the cooling water temperature in time update combined wheels.
Examined through final product quality, in film prepared by embodiment 1 and embodiment 2 label can not with conventional physical method by its
Each layer separation, so, peel strength is very good, and film surface light is penetrating, and melting layer clean mark is uniform, so that label and modeling in film
Material container is quickly thoroughly cleared in melting part bubble, has good operation in injection molded and the plastic containers of blow molding
Property and the integraty with container, make container aesthetics, mark is clear.
Claims (8)
1. target preparation process in mould, which comprises the following steps:
The preparation of the coating material of protective layer: be 1 by mass ratio: the high density polyethylene (HDPE) and low density polyethylene (LDPE) of (1~2) mix equal
It is even, polyethylene mixture is obtained, and polyethylene mixture is subjected to hot air type drying；
Protective layer is compound with substrate layer: the front of the substrate layer is the one side that substrate layer is printed on icon indicia, the substrate layer
Another side be reverse side；It is fitted into laminating machine with by substrate layer, and makes the front of substrate layer and the first barrel of laminating machine
It is corresponding to squeeze out material mouth；The polyethylene mixture prepared is packed into the first barrel of extruder, and first barrel is set
The polyethylene mixture is carried out melt process by temperature；Wherein the first barrel pressure is 5Mpa~15Mpa, coating die head temperature
Degree is 315 ± 20 DEG C, the polyethylene mixture is coated on the front of the substrate layer, and protective layer is formed；And it is applying
During covering, while combined wheels are used, protective layer and substrate layer are pressed；
Melting layer is compound with substrate layer: after ethylene-vinyl acetate resin is dried, flowing directly into the second of laminating machine
The extrusion material mouth of barrel, the second barrel of the laminating machine corresponds to the reverse side of substrate layer；The temperature of second barrel is set, it is right
Ethylene-vinyl acetate resin carries out heating and melting, and the second barrel pressure is 5Mpa~15Mpa, and the temperature of coating die head is 240 ±
10 DEG C, the reverse side of the substrate layer is coated, to form melting layer；And during coating, while using pressure
Line wheel, presses melting layer and substrate layer.
2. target preparation process in mould according to claim 1, which is characterized in that in protective layer and the compound step of substrate layer
In rapid, cooling water is connected in combined wheels used, cooling water temperature is 20~30 DEG C.
3. target preparation process in mould according to claim 1, which is characterized in that in melting layer and the compound step of substrate layer
In rapid, cooling water is connected in the embossing wheel, cooling water temperature is 20~30 DEG C.
4. target preparation process in mould according to claim 1, which is characterized in that it further include sided corona treatment, the corona
Processing step the protective layer and substrate layer be compound, the melting layer and substrate layer it is compound before, particular content are as follows: by base
Material layer is fitted into corona machine, and the power of corona machine is 0.3~1.0W/m2。
5. target preparation process in mould according to claim 1, which is characterized in that further include adhesive layer application step, institute
State adhesive layer application step the protective layer and substrate layer be compound, before the melting layer and substrate layer composite steps, it is described
The coating dry measure of adhesive is 0.01~0.3g/m2, be 70~90 DEG C in temperature after the completion of coating and be dried, it is dry
Time is 2~4s.
6. mould internal standard, which is characterized in that including substrate layer, protective layer, melting layer, the substrate layer is printed on the one side of pattern identification
Another side for front, the substrate layer is reverse side, and the protective layer is arranged on the front of the substrate layer, the melting layer
It is arranged on the reverse side of the substrate layer.
7. mould internal standard according to claim 6, which is characterized in that the substrate layer is BOPP film, BOPP foam films, PP thin
Film, PE film or PET film；The protective layer is polyethylene layer；The melting layer is ethylene-vinyl acetate copolymer layer.
8. mould internal standard according to claim 6, which is characterized in that the melting layer is equipped with embossed lines, the embossed lines
For 15~30 μ, line-spacing is 0.4~2mm.
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Application publication date: 20190723 |