CN100588693C - Low-temperature heat sealed high resistant foodstuff package cotating film latex and preparation method thereof - Google Patents
Low-temperature heat sealed high resistant foodstuff package cotating film latex and preparation method thereof Download PDFInfo
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- CN100588693C CN100588693C CN200810120694A CN200810120694A CN100588693C CN 100588693 C CN100588693 C CN 100588693C CN 200810120694 A CN200810120694 A CN 200810120694A CN 200810120694 A CN200810120694 A CN 200810120694A CN 100588693 C CN100588693 C CN 100588693C
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- 239000004816 latex Substances 0.000 title claims abstract description 29
- 229920000126 latex Polymers 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000178 monomer Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 235000013305 food Nutrition 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000004888 barrier function Effects 0.000 claims abstract description 11
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 claims abstract description 7
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 claims abstract description 6
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims abstract description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 4
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 4
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims abstract description 4
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 claims abstract description 3
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000012752 auxiliary agent Substances 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 239000012528 membrane Substances 0.000 claims description 11
- 239000003999 initiator Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000013543 active substance Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims description 4
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- 239000004141 Sodium laurylsulphate Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229960001763 zinc sulfate Drugs 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229960000583 acetic acid Drugs 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 125000004494 ethyl ester group Chemical group 0.000 claims description 2
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 2
- 239000012362 glacial acetic acid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 abstract description 7
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract 2
- 230000000996 additive effect Effects 0.000 abstract 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 abstract 1
- WRHHVVPVKLLPFT-UHFFFAOYSA-N 2-o-ethyl 1-o-methyl oxalate Chemical compound CCOC(=O)C(=O)OC WRHHVVPVKLLPFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910001873 dinitrogen Inorganic materials 0.000 abstract 1
- 238000009501 film coating Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- 229920006280 packaging film Polymers 0.000 abstract 1
- 239000012785 packaging film Substances 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 238000001035 drying Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 5
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 4
- 239000005033 polyvinylidene chloride Substances 0.000 description 4
- 235000019219 chocolate Nutrition 0.000 description 3
- 210000000795 conjunctiva Anatomy 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229920006233 biaxially oriented polyamide Polymers 0.000 description 1
- 235000015895 biscuits Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000009246 food effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to a low-temperature heat-sealing high-barrier food packaging film coating latex. The composition points of the mixed monomer of the latex is that vinylidene chloride accounts for 80 to 93 percent of the total amount of the mixed monomer; methyl acrylate, methyl ethyl oxalate, methyl methacrylate, butyl ester, acrylonitrile or methacrylonitrile account for 2 to 10 percent ofthe total amount of the mixed monomer; itaconic acid, acrylic acid, methacrylic acid account for 0.5 to 5 percent of the total amount of the mixed monomer; the surfactants added are 0.7 portion of SASand 0.3 portion of sodium dodecyl sulfate; the additive 3 is 0.01 portion of metallic salt. The preparation method includes the following steps: deionized water, surfactant and additive are added ina reactor; the reactor is vacuumized and the gas is replaced by nitrogen gas; the mixed monomer is added. The product of the invention has the advantages of low temperature heat sealing and high barrier performance, and the food using the product has longer shelf life.
Description
Technical field
The present invention relates to a kind of high barrier food package coated membrane latexes by thermal sealing at low temperature and preparation method.
Background technology
Latex is used in many products, the coating of the building decoration of using that has, and keep a public place clean in the surface of catering trade food box tool.But up to now, be used under the cold condition heat-sealing, and the food package coated membrane latex with high-barrier does not appear on the market as yet.Because of the heat-sealing temperature with a kind of plastic material will be close with the fusing point of material substantially, not so both fusion difficulty are big, do not reach the effect of heat-sealing.
Summary of the invention
For overcoming above-mentioned deficiency, the object of the invention provides a kind of preparation method of high barrier food package coated membrane latexes by thermal sealing at low temperature, it can be solved under cold condition seal, and have the technical problem of high-barrier characteristic.The objective of the invention is to adopt following technical scheme to realize.
A kind of high barrier food package coated membrane latexes by thermal sealing at low temperature, the main points of the configuration of the mix monomer of this latex are:
(1) vinylidene chloride accounts for 80%～93% of mix monomer total amount;
(2) methyl acrylate, ethyl ester, methyl methacrylate, butyl ester, vinyl cyanide or methacrylonitrile account for 2%～10% of mix monomer total amount;
(3) methylene-succinic acid, vinylformic acid, methacrylic acid account for 0.5%～5% of mix monomer total amount;
(4) adding tensio-active agent is 0.7 part of secondary sodium alkanesulfonate, 0.3 part of sodium lauryl sulphate;
(5) adding auxiliary agent 3 is 0.01 part of metal-salt.
(6) adding auxiliary agent 4 is 0.01 part in ionogen such as zinc sulfate.
A kind of preparation method of high barrier food package coated membrane latexes by thermal sealing at low temperature, this latex production technique is emulsion polymerisation process preparation commonly used, interrupter method, the latex of preparation is used in polypropylene BOPP, polyester PET, polymeric amide OPA goes up coating film forming, be used for the food package coated membrane surface, to airborne water, oxygen possesses high barrier.Described high-barrier is exactly by the made latex of the present invention, be coated on the surface of food package coated membrane, the food in the film will play and guarantee the quality, fresh-keeping effect, because coated film latex is with airborne water, oxygen has carried out the isolation of height blocking type, so be called " high-barrier ".Its key points in design is:
In reactor, add 42 parts of deionized waters, 0.7 part of the secondary sodium alkanesulfonate of tensio-active agent, 0.3 part of sodium lauryl sulphate, 0.001 part of auxiliary agent 1 (Glacial acetic acid), 0.0001 part of auxiliary agent 2 (ferrous ion), auxiliary agent 3 (ionogen, NaCl, KCl) 0.02 part, add in the reactor, vacuumize, use nitrogen replacement, vacuumize, use nitrogen replacement, vacuumize, twice half operations add 50 parts of mix monomers in reactor, cold dispersion half an hour, described cold dispersion is added to raw material in the reactor exactly, start stirring, reacting kettle jacketing adds the tap water cooling, is warming up to 52 ℃ thereafter, add 0.02 part of 0.02 part of initiator tertbutyl peroxide that configures and the initiator B formolation Sodium Thiosulfate that configures continuously, when reaction pressure was reduced to negative pressure, reaction finished, and added auxiliary agent 4,0.01 part, vacuumize and take off suction, earlier temperature is risen to 70 ℃～75 ℃, open vacuum pump, open bottom valve on a small quantity, feed the steam of 0.1～0.2MPa, open vacuum, be evacuated to-the 0.09MPa treatment time is 4～5 hours, be cooled to 38 ℃, filter discharging by 120 orders;
Advantage of the present invention: the temperature of low-temperature heat-sealing is 110 ℃, possesses high obstructing performance, prolongs shelf-lives, the quality guaranteed period of food.
By BOPP, BOPET, BOPA being carried out the test after the PVDC emulsion is coated with preceding and coating
Chocolate is packed respectively with heat-sealing type BOPP and PVDC,,, under the 50% relative humidity condition, carried out fuchsin(e)test and sensory evaluation at 25 ℃ to estimate the degree of protection of two kinds of materials to biscuit.Found that the former after four months fragility obviously reduce, lose chocolate taste after six months, rate of moisture absorption reaches 1.88% after four months, and the latter is after seven months, fragility is still fine, does not lower chocolate taste after nine months on mouthfeel, and rate of moisture absorption reached 1.58% in seven months.The packing bag of PVDC through the coating of this latex is described, to airborne water, oxygen has high barrier, makes the fresh-keeping effect of food good.
Description of drawings
Fig. 1 is a technological process block-diagram.
Earlier auxiliary agent, deionized water, surfactant are added in the reactor, add nitrogen, vacuumize, will mix Close monomer and be added in the reactor, cold dispersion half an hour, be warming up to 52 ℃, add simultaneously initiator A, B, When reactor Pressure Drop during to-0.01Mpa, add auxiliary agent 4, the vacuum desorption is cooled to 38 ℃, filters out Become product.
Embodiment
Scheme 1
Preparation: 0.02 part of adding of initiator A tertbutyl peroxide 8kg deionized water is standby;
0.02 part of adding of initiator B formolation time sodium bisulfite 8kg deionized water is standby;
Still material: deionized water 82kg
Auxiliary agent 10.02kg
Auxiliary agent 20.002kg
Auxiliary agent 30.04kg
Emulsifying agent: secondary sodium alkanesulfonate 1.4kg
Dodecyl acid sulphur sodium 0.6kg
Mix monomer vinylidene chloride 92.5kg
Vinyl cyanide 7kg
Methylene-succinic acid 0.5kg
The still material is added in 200 liters of reactors, vacuumized nitrogen, at last the pressure of reactor is reduced to-0.08～-0.095MPa, suck mix monomer, cold dispersion half an hour, when being warming up to 52 ℃, add the initiator A tertbutyl peroxide that configures continuously, initiator B formolation time sodium bisulfite, temperature keeps 52 ℃, and the reaction times is 10-15 hour, when pressure is reduced to 0.01MPa, stop adding initiator, open reactor and add auxiliary agent 4 zinc sulfate, heat up to take off and inhaled 4 hours, be cooled to 38 ℃, filter discharging by 120 order stainless (steel) wires.The acquisition physical index is as follows:
Solid content (%) 50 ± 1
Surface tension (mN/m)≤50
Viscosity (mPa.s)≤10
PH 2-3
Density (g/m m) 1.25～1.29
Scheme 2
Preparation, still material, tensio-active agent, deionized water are identical with scheme 1.
Mix monomer: vinylidene chloride 92.5kg
Ethyl propenoate 6.5kg
Vinylformic acid 1kg
The acquisition physical index is as follows:
Solid content (%) 50 ± 1
Surface tension (mN/m)≤50
Viscosity (mPa.s)≤10
PH 2-3
Density (g/mm) 1.25～1.29
Scheme 3
Preparation, still material, tensio-active agent, deionized water are identical with scheme 1.
Mix monomer: vinylidene chloride 92.5kg
Methyl methacrylate 6.5kg
Methacrylic acid 1kg
Solid content (%) 50 ± 1
Surface tension (mN/m)≤50
Viscosity (mPa.s)≤10
PH 2-3
Density (g/mm) 1.25～1.29
The use introduction of latex: coated film applies latex again behind coating primer (polyamine fat or water-soluble primer), latex is operational version 1,2,3 separately; Or select scheme 1 latex 80kg for use; Scheme 2 latex 20kg mix coating; Or select scheme 1 latex 80kg for use, and scheme 3 latex 20kg mix coating, and the mixing of this latex can be adjusted use according to customer requirement.
The working conditions of latex
Drying tunnel top temperature: 110～125 ℃ glue spread: 2.5～3g/ square metre
Set time: 45 ℃ of 48 hours solid contents in the drying room: 50% ± 1%
One, latex allotment
Before the latex warehouse-in, the user contrasts the quality certificate content, as requested, suitably does a little allotments, and the equipment of contact latex should be corrosion resistant
Two, pH value is regulated
If generally speaking, the latex pH value is 1～3, and is all useful to transparency after cohesive strength, the film forming and uvioresistant lamp, but coating apparatus this acidity of ability not, can add 3% ammonia soln and allocate, and should add under fully stirring.
Three, surface tension adjustment
Reduce surface tension of latex, can add the secondary sodium alkanesulfonate of tensio-active agent below 20%, add under fully stirring, the emulsifying agent consumption should be less than 1% of latex solid content, otherwise will influence coating quality.
Four, glued membrane temperature and heat energy mode
The latex minimum film-forming temperature is generally 16～28 ℃, therefore, hopper, version roller operating temperature should be lower than 15 ℃.About 90 ℃ of base material coating after drying temperature, preferably with the outer thermal source of far infrared rays from the substrate backside radiative oven dry, otherwise cause vaporific film easily.
Five, drying tunnel temperature distributes
Drying tunnel easily adopts gradient increased temperature, at the last shelves of drying tunnel outlet, moment film temperature about 110 ℃, it is fully plastified, the easy like this film that makes reaches desirable degree of crystallinity.
Six, the application of poly-cold roller
Must collect suddenly the film temperature drop is arrived room temperature, unlikely adhesion when helping the film forming rolling like this through poly-cold roller (interior logical cold water) after going out drying tunnel.
Seven, set time
The PVDC coated film must be placed on 45 ℃ of drying rooms 48 hours, made it reach maximum degree of crystallinity, and its barrier property can reach application indexes.
Eight, equipment washing
Coating system should be rinsed well with tap water when shutting down at once, otherwise can influence coating next time by conjunctiva, can use hot-water soak if any conjunctiva, and conjunctiva can remove.
Claims (1)
1, a kind of preparation method of high barrier food package coated membrane latexes by thermal sealing at low temperature, this latex production technique is emulsion polymerisation process preparation commonly used, interrupter method, the latex of preparation is used in polypropylene BOPP, polyester PET, polymeric amide OPA goes up coating film forming, be used for the food package coated membrane surface, to airborne water, oxygen has high barrier, it is characterized in that:
In reactor, add 42 parts of deionized waters, 0.7 part of the secondary sodium alkanesulfonate of tensio-active agent, 0.3 part of sodium lauryl sulphate, 0.001 part in auxiliary agent 1 Glacial acetic acid, 0.0001 part of auxiliary agent 2 ferrous ion, 0.02 part of auxiliary agent 3NaCl or KCl; Vacuumize in reactor, use nitrogen replacement, vacuumize, use nitrogen replacement, vacuumize, twice half operations add 50 parts of mix monomers in reactor, cold dispersion half an hour; Described cold dispersion is added to raw material in the reactor exactly, start stirring, reacting kettle jacketing adds the tap water cooling, thereafter be warming up to 52 ℃, add 0.02 part of 0.02 part of initiator tertbutyl peroxide that configures and the initiator formolation Sodium Thiosulfate that configures continuously, when reaction pressure was reduced to negative pressure, reaction finished, add 0.01 part in auxiliary agent 4 zinc sulfate, vacuumize and take off suction, earlier temperature is risen to 70 ℃～75 ℃, open vacuum pump, open bottom valve on a small quantity, feed the steam of 0.1～0.2MPa, open vacuum, be evacuated to-the 0.09MPa treatment time is 4～5 hours, be cooled to 38 ℃, filter discharging by 120 orders; Described mix monomer is made up of following material:
(1) vinylidene chloride accounts for 80%～93% of mix monomer total amount;
(2) methyl acrylate, ethyl ester, methyl methacrylate, butyl ester, vinyl cyanide or methacrylonitrile account for 2%～10% of mix monomer total amount;
(3) methylene-succinic acid, vinylformic acid, methacrylic acid account for 0.5%～5% of mix monomer total amount.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810120694A CN100588693C (en) | 2008-09-04 | 2008-09-04 | Low-temperature heat sealed high resistant foodstuff package cotating film latex and preparation method thereof |
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| CN200810120694A CN100588693C (en) | 2008-09-04 | 2008-09-04 | Low-temperature heat sealed high resistant foodstuff package cotating film latex and preparation method thereof |
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| CN101358054A CN101358054A (en) | 2009-02-04 |
| CN100588693C true CN100588693C (en) | 2010-02-10 |
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| CN103087249B (en) * | 2012-12-26 | 2015-12-23 | 海南聚能功能薄膜技术开发有限公司 | Food packaging latex and its preparation method and application |
| CN103044602B (en) * | 2012-12-26 | 2015-04-08 | 海南必凯水性涂料有限公司 | Paper coating water-based emulsion and preparation method and applications thereof |
| CN103059198B (en) * | 2012-12-26 | 2015-07-22 | 海南必凯水性涂料有限公司 | Polyvinylidene chloride copolymer emulsion used for glass fiber dip coating and preparation thereof and application thereof |
| CN103059197B (en) * | 2012-12-26 | 2015-04-08 | 海南必凯水性涂料有限公司 | Aqueous antiseptic metal undercoat polyvinyl dichloride (PVDC) copolymer emulsion and preparation method thereof and application |
| CN103059193B (en) * | 2012-12-26 | 2016-01-20 | 海南聚能功能薄膜技术开发有限公司 | Special PVDC latex coating of cigarette film and its preparation method and application |
| CN103059200B (en) * | 2012-12-26 | 2015-12-23 | 海南聚能功能薄膜技术开发有限公司 | Glassine paper coating PVDC emulsion and its preparation method and application |
| CN103044604B (en) * | 2012-12-26 | 2015-04-08 | 海南必凯水性涂料有限公司 | Polyvinylidene chloride copolymer emulsion for glass fiber dip-coating liquid, as well as preparation method and use thereof |
| CN103059194B (en) * | 2012-12-26 | 2015-06-24 | 海南必凯水性涂料有限公司 | Polyvinyl dichloride (PVDC) latex special for slick paper used for food packaging and preparation method thereof and application thereof |
| CN103319642B (en) * | 2013-05-17 | 2015-09-30 | 海南必凯水性涂料有限公司 | A kind of heat-sealing type PVDC emulsion possessing anti-fog function and preparation method thereof |
| JP6739202B2 (en) * | 2016-03-28 | 2020-08-12 | 株式会社クレハ | Method for producing vinylidene chloride resin film and method for recycling pile liquid used in the method |
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2008
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