WO2024093601A1 - 包装套筒及其灭菌和质量检测方法、液体食品的灌装方法 - Google Patents
包装套筒及其灭菌和质量检测方法、液体食品的灌装方法 Download PDFInfo
- Publication number
- WO2024093601A1 WO2024093601A1 PCT/CN2023/122679 CN2023122679W WO2024093601A1 WO 2024093601 A1 WO2024093601 A1 WO 2024093601A1 CN 2023122679 W CN2023122679 W CN 2023122679W WO 2024093601 A1 WO2024093601 A1 WO 2024093601A1
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- WIPO (PCT)
- Prior art keywords
- packaging sleeve
- packaging
- sterilization
- sleeve
- electron beam
- Prior art date
Links
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 177
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 100
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 73
- 235000021056 liquid food Nutrition 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title abstract 2
- 238000010894 electron beam technology Methods 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 25
- 230000032798 delamination Effects 0.000 claims description 15
- 231100000987 absorbed dose Toxicity 0.000 claims description 11
- 241000894006 Bacteria Species 0.000 claims description 9
- 238000007689 inspection Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 12
- 229920006280 packaging film Polymers 0.000 description 9
- 239000012785 packaging film Substances 0.000 description 9
- 239000004698 Polyethylene Substances 0.000 description 8
- 229920001684 low density polyethylene Polymers 0.000 description 8
- 239000004702 low-density polyethylene Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- -1 polyethylene Polymers 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000000123 paper Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 235000013305 food Nutrition 0.000 description 5
- 229920000098 polyolefin Polymers 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001967 plate count agar Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004712 Metallocene polyethylene (PE-MC) Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 3
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 238000009455 aseptic packaging Methods 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 235000013365 dairy product Nutrition 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 2
- 235000021581 juice product Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229910017107 AlOx Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101000827703 Homo sapiens Polyphosphoinositide phosphatase Proteins 0.000 description 1
- 229920010126 Linear Low Density Polyethylene (LLDPE) Polymers 0.000 description 1
- 102100023591 Polyphosphoinositide phosphatase Human genes 0.000 description 1
- 101100012902 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) FIG2 gene Proteins 0.000 description 1
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000004708 Very-low-density polyethylene Substances 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910003107 Zn2SnO4 Inorganic materials 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 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
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000012536 packaging technology Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- UQMOLLPKNHFRAC-UHFFFAOYSA-N tetrabutyl silicate Chemical compound CCCCO[Si](OCCCC)(OCCCC)OCCCC UQMOLLPKNHFRAC-UHFFFAOYSA-N 0.000 description 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 1
- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 229920001866 very low density polyethylene Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 235000013618 yogurt Nutrition 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/02—Sterilising, e.g. of complete packages
- B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
- B65B55/08—Sterilising wrappers or receptacles prior to, or during, packaging by irradiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B57/00—Automatic control, checking, warning, or safety devices
- B65B57/02—Automatic control, checking, warning, or safety devices responsive to absence, presence, abnormal feed, or misplacement of binding or wrapping material, containers, or packages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
- B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
Definitions
- the present disclosure relates to the field of packaging technology, and in particular to a packaging sleeve and a sterilization and quality detection method thereof, and a liquid food filling method.
- aseptic packaging containers can be roughly divided into two types: one is the paper roll forming type, which is formed into a cylinder by filling the paper roll packaging material on the filling machine, and then formed into a packaging container; the other is the paper box preformed type, which is formed by opening the packaging sleeve into a cylinder on the filling machine, sealing the bottom first, and then sealing the top after the product is filled.
- the carton preformed packaging material provides users with packaging sleeves that have been cut and back-sealed, this can avoid factors such as loss caused by cutting and back-sealing during the production process, the pressure on the paper roll forming packaging material, and the wear of spare parts. Therefore, the carton preformed machine has higher stability and lower loss.
- the filling process of juice and dairy products containing solid particles it is usually necessary to put the solid particles first and then fill the liquid. Since it is different from the filling process of pure liquid, the traditional paper roll forming filling is not applicable, and it is suitable to use carton preformed machine filling.
- Embodiments of the present disclosure provide a packaging sleeve and a sterilization and quality inspection method thereof, and a liquid food filling method to meet food safety regulations.
- An embodiment of the present disclosure provides a method for sterilizing a packaging sleeve, comprising:
- the packaging sleeves comprising an unsealed top and a bottom;
- the packaging sleeve is irradiated with an electron beam having an energy less than 10 MeV generated by an electron accelerator. Sterilized by irradiation.
- the packaging sleeve is irradiated and sterilized using an electron beam with an energy of less than 10 MeV generated by an electron accelerator, specifically comprising:
- the packaging sleeve is irradiated and sterilized by using an electron beam with an energy of 0.3MeV to 0.8MeV generated by an electron accelerator.
- the above sterilization method while using an electron beam with energy less than 10 MeV generated by an electron accelerator to irradiate and sterilize the packaging sleeve, it also includes: moving the packaging sleeve at a speed of less than 60 m/min.
- the packaging sleeve while using an electron beam with energy less than 10MeV generated by an electron accelerator to irradiate and sterilize the packaging sleeve, it also includes: controlling the packaging sleeve to absorb a dose of 4KGY to 10KGY of the electron beam.
- the packaging sleeve is irradiated and sterilized by an electron beam with energy less than 10MeV generated by an electron accelerator, the irradiation sterilization area and the area within a preset distance from the irradiation sterilization area are shielded by a steel plate.
- an embodiment of the present disclosure provides a quality inspection method for a packaging sleeve, comprising:
- the top and/or bottom of the first packaging sleeve are subjected to a sterilization rate test, an odor test, a sealing strength test and a delamination test, and it is determined whether the test results meet the reference standards. If the test results meet the requirements of the reference standards, the first packaging sleeve is determined to be qualified; otherwise, the first packaging sleeve is determined to be unqualified.
- the above-mentioned quality inspection method provided in the embodiments of the present disclosure also includes: providing a second packaging sleeve that has not been sterilized, and performing an odor test, a sealing strength test and a delamination test on the top and/or bottom of the second packaging sleeve, and formulating a reference standard for the corresponding test based on the test results of the second packaging sleeve.
- an embodiment of the present disclosure provides a method for filling liquid food, comprising:
- the packaging sleeve is sterilized by the sterilization method provided in the embodiment of the present disclosure.
- the top of the packaging sleeve is sealed.
- the method further includes:
- the sterilization method provided in the embodiment of the present disclosure is used to perform irradiation sterilization on the top of the packaging sleeve, wherein the packaging sleeve comprises a longitudinal seam, and the length of the top of the packaging sleeve in the extension direction of the longitudinal seam is 2 mm to 10 mm.
- the liquid food is poured into the packaging sleeve from the top of the packaging sleeve, and before the top of the packaging sleeve is irradiated and sterilized by the above-mentioned sterilization method provided in the embodiments of the present disclosure, it also includes: cleaning dust on the top of the packaging sleeve.
- an embodiment of the present disclosure further provides a packaging sleeve, which is sterilized using the above-mentioned sterilization method improved by the embodiment of the present disclosure, and the amount of bacteria on the top of the packaging sleeve with a height of 2 to 6 mm is lower than the amount of bacteria on other positions outside the top.
- the embodiments of the present disclosure provide a packaging sleeve and a sterilization and quality inspection method thereof, as well as a filling method for liquid food, including providing a plurality of packaging sleeves arranged in a stack, wherein the packaging sleeves include an unsealed top and a bottom; and using an electron beam with an energy of less than 10MeV generated by an electron accelerator to irradiate and sterilize the packaging sleeve.
- an electron beam to irradiate and sterilize the packaging sleeve, chemical residues on the surface of the packaging sleeve can be avoided while effectively sterilizing, thereby complying with food safety regulations.
- the electron beam irradiation sterilization in the related art uses an electron beam with an energy of 10MeV to 30MeV
- the embodiments of the present disclosure use an electron beam with an energy lower than 10MeV to achieve a good sterilization effect; lower energy electron beams have less impact on the packaging sleeve and are safer for operators.
- FIG1 is a flow chart of a method for sterilizing a packaging sleeve according to an embodiment of the present disclosure
- FIG2 is a schematic diagram of stacked packaging sleeves provided in an embodiment of the present disclosure.
- FIG3 is a schematic diagram of a bundle provided by an embodiment of the present disclosure.
- FIG4 is a diagram showing a transmission path of a packaging sleeve during a sterilization process according to an embodiment of the present disclosure
- FIG5 is a flow chart of a method for detecting quality of a packaging sleeve provided in an embodiment of the present disclosure
- FIG6 is a flow chart of a liquid food filling method provided in an embodiment of the present disclosure.
- FIG. 7 is a schematic diagram of the sterilization detection position provided in an embodiment of the present disclosure.
- the packaging sleeve is packed in an outer packaging such as a packaging film in a stacked manner, and then transported to the filling site of the filled beverage for filling.
- the outer packaging may absorb some microorganisms and impurities, which may contaminate the packaging sleeve inside the outer packaging.
- hydrogen peroxide is used to sterilize the packaging sleeve before filling. Although hydrogen peroxide is easy to decompose, it cannot dry quickly, resulting in hydrogen peroxide residue on the surface of the packaging sleeve. Even if a sterile air drying process is added later, it cannot be guaranteed that there is no hydrogen peroxide residue on the surface of the packaging sleeve, making it difficult to meet increasingly stringent food safety regulations.
- an embodiment of the present disclosure provides a method for sterilizing a packaging sleeve, as shown in FIG1 , comprising the following steps:
- the packaging sleeves include an unsealed top and a bottom; optionally, as shown in FIG. 3 , during transportation, the plurality of stacked packaging sleeves S may be wrapped with an outer packaging such as a packaging film RSW to form a bundle B.
- an outer packaging such as a packaging film RSW
- the packaging The longitudinal tensile strength of the packaging film RSW is ⁇ 40MPa, the transverse tensile strength is ⁇ 30MPa, the longitudinal elongation at break is ⁇ 200%, the transverse elongation at break is ⁇ 400%, the longitudinal shrinkage at 160°C is 65% to 90%, and the transverse shrinkage at 160°C is 15% to 35%, so as to improve the packaging quality through the packaging film RSW, reduce the damage to the quality of the packaging sleeve due to the damage of the packaging film RSW, or the loosening of the packaging sleeve due to the poor shrinkage of the packaging film RSW.
- the packaging film RSW includes a weld WS and a protruding end P
- the packaging film RSW may also have a loading carrier C, which can be placed on the packaging sleeve S and is therefore arranged between the packaging sleeve S and the packaging film RSW.
- the loading carrier C is intended to contain an active substance (e.g., a fungicide) and introduce the active substance into the bundle B.
- the loading carrier C can be constructed as a flat plate.
- the loading carrier C is only optional, and therefore, the bundle B according to the present disclosure may or may not have a loading carrier C.
- Electron beam irradiation sterilization is a high-tech method that uses a high-energy electron beam generated by the high-voltage electric field of an electron accelerator to instantly change the structure of microorganisms and make them lose their biological activity.
- the items sterilized by electron beam irradiation only receive the energy of the electron beam. It is a physical sterilization process, no chemical substances are added, and there are no chemical residues.
- the packaging sleeve is irradiated and sterilized by an electron beam, which can effectively sterilize while avoiding chemical residues on the surface of the packaging sleeve, complying with food safety regulations.
- the electron beam irradiation sterilization in the related art uses an electron beam with an energy of 10MeV to 30MeV.
- the embodiment of the present disclosure uses an electron beam with an energy lower than 10MeV to achieve a good sterilization effect; the lower energy electron beam has less impact on the packaging sleeve and is safer for operators.
- a conveyor belt CB or the like may be used to transfer the packaging sleeve S to the irradiation sterilization area IS, and the packaging sleeve S is sterilized by electron beam irradiation in the irradiation sterilization area IS.
- the above step S102 using an electron beam with an energy of less than 10 MeV generated by an electron accelerator to irradiate and sterilize the packaging sleeve, may specifically be: using an electron beam with an energy of 0.3 MeV to 0.8 MeV (e.g., 0.5 MeV) generated by an electron accelerator to irradiate and sterilize the packaging sleeve.
- the width of the electron beam is 16 mm.
- the packaging sleeve while executing step S102 and using an electron beam with an energy of less than 10 MeV generated by an electron accelerator to irradiate and sterilize the packaging sleeve, the packaging sleeve can also be moved at a speed of less than 60 m/min (e.g., 15 m/min). cartridge so that the electron beam can fully sterilize the packaging sleeve.
- the absorbed dose (Dose) of the packaging sleeve to the electron beam can also be controlled to be 4KGY to 10KGY, such as 4KGY, 6KGY, 10KGY, etc.
- this dose not only can effective sterilization be achieved, but also defects such as film degradation, stratification, and poor sealing caused by excessive irradiation of the packaging sleeve with electron beams can be avoided.
- a steel plate can be used to shield the irradiation sterilization area IS and the area SD within a preset distance of the irradiation sterilization area IS (as shown in Figure 4).
- the steel plate in the present disclosure can be fixed on the sterilization equipment all the time, and the electron beam can be shielded during the time period of electron beam irradiation sterilization.
- the energy of the electron beam is relatively large, concrete or the like is required for shielding; in the present disclosure, the energy of the electron beam is relatively small, and steel plates or the like can be used for shielding, which is lower in cost.
- the embodiment of the present disclosure provides a packaging sleeve quality detection method, as shown in FIG5, which may include the following steps:
- the reference standard for the sterilization rate test can be formulated according to industry specifications and customer requirements, for example, a sterilization rate greater than 90% is equivalent to a log reduction greater than 1; the corresponding reference standards for the odor test, the sealing strength test, and the delamination test can be formulated based on the corresponding test results of the packaging sleeve before sterilization.
- a reference standard for the sterilization rate test can also be provided according to industry specifications and customer requirements.
- a second packaging sleeve (equivalent to the first packaging sleeve before sterilization) is prepared, and an odor test, a sealing strength test and a delamination test are performed on the top and/or bottom of the second packaging sleeve.
- Reference standards for corresponding tests are formulated according to the test results of the second packaging sleeve.
- a reference standard for the odor test is formulated according to the odor test results of the second packaging sleeve
- a reference standard for the sealing strength test is formulated according to the sealing strength test results of the second packaging sleeve
- a reference standard for the delamination test is formulated according to the delamination test results of the second packaging sleeve.
- the packaging sleeve can be a layer structure consisting of an inner covering layer, a barrier layer, a composite layer, a carrier layer and an outer covering layer arranged in a stacked manner.
- the material of the inner covering layer may include more than two inner covering layer polymers, and the inner covering layer polymer is a polyolefin material.
- the inner covering layer polymer is one of a high-density polyolefin, a low-density polyolefin and a metallocene polyolefin.
- the polyolefin is polyethylene.
- the inner covering layer polymer is one of a high-density polyethylene, a low-density polyethylene and a metallocene polyethylene (mPE).
- the metallocene polyethylene includes a linear low-density polyethylene (LLDPE) and a relatively low-density polyethylene (VLDPE).
- the barrier layer may have at least one of the functions of light shielding, water blocking, and oxygen blocking.
- the material of the barrier layer may include aluminum foil (Al), iron foil (Fe), copper foil (Cu), aluminum oxide ( AlOx ), magnesium oxide ( MgO ), titanium oxide ( TiO2 ), zirconium oxide ( ZrO2 ), tin oxide (SnO, Sn2O3 , SnO2 ), zinc oxide (ZnO), indium oxide ( InO , In2O3 , InO2 ), indium tin oxide (ITO), zinc stannate ( Zn2SnO4 ), silicon oxide ( SiOy ), silicon nitride ( Si3N4 ), silicon oxynitride (SiON), silicon carbide ( SiC ), silicon oxycarbide ( SiqOmCn , q is 15-30, m is 25-60, and n is 15-50), organic silicon compounds (such as tetramethoxysilane Si( OCH
- the composite layer can have a shading effect, and the material of the composite layer can include shading material.
- the shading material can be a carbon black masterbatch with light-absorbing effect, or a titanium dioxide masterbatch with light-reflecting effect.
- the composite layer can be prepared by doping the shading material into the polyethylene layer.
- the carrier layer has sufficient strength and rigidity, and the carrier layer can be selected from one or any combination of cardboard, paperboard and paper; in some embodiments, the carrier layer can also be used to print various patterns and characters.
- the outer cover layer comprises polyethylene (PE) and/or polypropylene (PP); optionally, the polyethylene (PE) comprises low-density polyethylene (LDPE) and/or high-density polyethylene (HDPE);
- the mass proportion of low-density polyethylene in the outer covering layer can be greater than or equal to 50%, for example, the mass proportion of low-density polyethylene in the outer covering layer is 50%, 60%, 70%, 80%, 90%, 100%, etc.
- the material of the outer covering layer is preferably low-density polyethylene.
- Table 1 shows the sterilization data of the top of 2 mm high packaging sleeves of two batches (marked as sample 1 and sample 2 respectively) when the absorbed doses were 0 KGY (equivalent to unsterilized), 4 KGY, 6 KGY and 10 KGY respectively, wherein the colony count represents the total number of bacterial colonies per gram of debris (cfu/g Sleeve) after the top layer structure was crushed and cultured in plate count agar (PC-Agar) medium at 37°C for 2 days (2d), and the logarithm of the killing value is the difference between the logarithm of the colony count before and after sterilization when the colony count is expressed as a logarithm with base 10.
- PC-Agar plate count agar
- Table 2 shows the sterilization rate test, odor test, sealing strength test, and Test results of delamination test.
- sample 0 in Table 2 represents a packaging sleeve that has not been sterilized (which can be equivalent to the packaging sleeve before sterilization), and samples 1, 2, and 3 correspond to packaging sleeves with absorbed doses of 4KGY, 6KGY, and 10KGY, respectively.
- the odor test, seal strength test, and delamination test of sample 0 can be used as reference standards for the corresponding tests of samples 1, 2, and 3; the larger the kill logarithm (log reduction) value in the sterilization rate column, the better the sterilization effect; the higher the score in the odor column, the more obvious the odor, and the qualified "Yes” means that the odor is within the acceptable range; the larger the value in the seal strength column, the better the sealing; "No" in the delamination column means that there is no delamination or the delamination is not obvious and can be ignored.
- the embodiments of the present disclosure also provide a filling method for liquid food (such as pure milk, yogurt, beverages, etc.). Since the principle of solving the problem by the filling method is similar to the principle of solving the problem by the above-mentioned sterilization method, the implementation of the filling method provided by the embodiments of the present disclosure can refer to the implementation of the above-mentioned sterilization method provided by the embodiments of the present disclosure, and the repeated parts will not be repeated.
- liquid food such as pure milk, yogurt, beverages, etc.
- the filling method of liquid food provided by the embodiments of the present disclosure, as shown in FIG6 , comprises the following steps:
- the top of the packaging sleeve can be sealed by pressing with the help of an ultrasonic electrode and an anvil.
- the packaging sleeve includes a longitudinal seam, and the length of the top of the packaging sleeve in the direction in which the longitudinal seam extends is 2mm to 10mm, preferably 2mm to 6mm, for example 2mm, 4mm, 6mm, etc.
- the above-mentioned sterilization method provided by the embodiment of the present disclosure can also be used to irradiate and sterilize the top of the packaging sleeve, so that the dust attached to the top can be effectively sterilized, so that the amount of bacteria on the top is lower than that on other positions (such as the bottom of the packaging sleeve, the middle part between the bottom and the top), thereby reducing the risk of dust contamination to the unsealed top.
- the top with a length of 2mm to 10mm is irradiated and sterilized, which minimizes the radiation of the electron beam to the internal liquid food, thereby not affecting the flavor of the liquid food and not causing the loss of nutrition of the liquid food.
- the dust on the top of the packaging sleeve can also be removed, which makes it easier for the electron beam to sterilize the top; in addition, the contamination of the filling machine, especially the sealing tool, by dust can be reduced, and the maintenance interval and/or cleaning interval of the sealing tool can be extended.
- an embodiment of the present disclosure provides a packaging sleeve, which is sterilized using the above-mentioned sterilization method provided by the embodiment of the present disclosure, and the amount of bacteria on the top of the packaging sleeve with a height of 2 to 6 mm is lower than the amount of bacteria on other positions outside the top.
- Table 3 shows the sterilization data of five different positions from the top to the bottom (as shown in FIG. 7 ) after irradiation sterilization of the top within a height of 4 mm under the condition of an absorbed dose of 6 KGY.
- the layer structures at the five positions can be crushed separately and cultured in a plate count agar (PC-Agar) medium at a temperature of 37°C for 2 days (2d) to detect the total number of bacterial colonies (cfu/g Sleeve) contained in each gram of debris.
- the number of colonies at the top within a height of 4 mm is less than 1, but the number of colonies at the top within a height range of 50 mm to 60 mm reaches 108, and the number of colonies at the middle part and the bottom with a height of 2 mm is as high as 200.
- the amount of bacteria carried after irradiation sterilization of the top within a height of 4 mm in the present disclosure is much lower than the amount of bacteria carried at other positions (such as the top, the middle part and the bottom with a height of 2 mm within a height range of 50 mm to 60 mm).
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Abstract
包装套筒（S）及其灭菌和质量检测方法、液体食品的灌装方法。包装套筒（S）的灭菌方法包括提供堆叠设置的多个包装套筒（S），包装套筒（S）包括未封合的顶部和底部；采用由电子加速器产生的能量小于10MeV的电子束对包装套筒（S）进行辐照灭菌。
Description
本申请要求以下中国专利申请的优先权：于2022年10月31日提交中国专利局的申请号为202211345449.2、发明创造名称为“包装套筒及其灭菌和质量检测方法、液体食品的灌装方法”的中国专利申请。该专利申请的全部内容通过引用结合在本申请中。
本公开涉及包装技术领域，尤其涉及一种包装套筒及其灭菌和质量检测方法、液体食品的灌装方法。
市场上销售的果汁、奶制品等食品通常灌装于无菌包装容器中。目前，无菌包装容器大体可分为两种：其一为纸卷成型式，其通过在灌装机上将纸卷包装材料成型成圆筒后灌装，然后将其成型为包装容器；其二为纸盒预成型式，其通过在灌装机上将包装套筒打开成筒体后，先封合底部，待灌完产品后再封合顶部。
由于纸盒预成型式的包装材料所提供给用户的是已经切割和背封的包装套筒，如此可避免客户在生产过程中由于切割和背封而引起的损耗、纸卷成型包材所承受的压力和零备件磨损等因素，因此纸盒预成型上机的稳定性更高且损耗更低。此外，在含有固体颗粒的果汁及奶制品的灌装过程中，通常需要先放固体颗粒，再进行液体灌装，由于其不同于纯液体的灌装工艺，故而传统的纸卷式成型灌装无法适用，适宜采用纸盒预成型上机灌装。
发明内容
本公开的实施例提供一种包装套筒及其灭菌和质量检测方法、液体食品的灌装方法，用以满足食品安全规范。
本公开的实施例提供的一种包装套筒的灭菌方法，包括：
提供堆叠设置的多个包装套筒，所述包装套筒包括未封合的顶部和底部；
采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行
辐照灭菌。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌，具体包括：
采用由电子加速器产生的能量为0.3MeV～0.8MeV的电子束对所述包装套筒进行辐照灭菌。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，还包括：以60m/min以内的速度移动所述包装套筒。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，还包括：控制所述包装套筒对电子束的吸收剂量为4KGY～10KGY。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，至少在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，利用钢板对辐照灭菌区及所述辐照灭菌区预设距离内的区域进行屏蔽。
相应地，本公开的实施例提供了一种包装套筒的质量检测方法，包括：
提供采用本公开的实施例提供的上述灭菌方法处理后的第一包装套筒；
对所述第一包装套筒的顶部和/或底部进行灭菌率测试、气味测试、密封强度测试和分层测试，并判断测试结果是否满足参考标准，若测试结果满足参考标准的要求，则确定所述第一包装套筒合格，否则确定所述第一包装套筒不合格。
在一些实施例中，在本公开的实施例提供的上述质量检测方法中，还包括：提供未经灭菌处理的第二包装套筒，并对所述第二包装套筒的顶部和/或底部进行气味测试、密封强度测试和分层测试，根据所述第二包装套筒的测试结果拟定相应测试的参考标准。
基于同一发明构思，本公开的实施例提供了一种液体食品的灌装方法，包括：
采用本公开的实施例提供的上述灭菌方法对包装套筒进行灭菌；
封合所述包装套筒的底部，并保证所述包装套筒的顶部敞开；
将液体食品由所述包装套筒的顶部灌入所述包装套筒内；
封合所述包装套筒的顶部。
在一些实施例中，在本公开的实施例提供的上述灌装方法中，在将液体食品由所述包装套筒的顶部灌入所述包装套筒内之后，且在封合所述包装套筒的顶部之前，还包括：
采用本公开的实施例提供的上述灭菌方法对所述包装套筒的顶部进行辐照灭菌，所述包装套筒包括纵向接缝，所述包装套筒的顶部在纵向接缝延伸方向上的长度为2mm～10mm。
在一些实施例中，在本公开的实施例提供的上述灌装方法中，在将液体食品由所述包装套筒的顶部灌入所述包装套筒内之后，且在采用本公开的实施例提供的上述灭菌方法对所述包装套筒的顶部进行辐照灭菌之前，还包括：清除所述包装套筒的顶部上的灰尘。
基于同一发明构思，本公开的实施例还提供了一种包装套筒，所述包装套筒采用本公开的实施例提高的上述灭菌方法进行灭菌，所述包装套筒2～6mm高的顶部的带菌量低于所述顶部之外其他位置的带菌量。
本公开的有益效果如下：
本公开的实施例提供的包装套筒及其灭菌和质量检测方法、液体食品的灌装方法，包括提供堆叠设置的多个包装套筒，包装套筒包括未封合的顶部和底部；采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌。通过采用电子束对包装套筒进行辐照灭菌，可在有效灭菌的同时，避免包装套筒表面有化学残留，符合食品安全规范。另外，相关技术中的电子束辐照灭菌采用能量为10MeV～30MeV的电子束，本公开的实施例采用能量低于10MeV的电子束即可实现良好的灭菌效果；较低能量的电子束对包装套筒的影响较小，且对操作人员而言更安全。
图1为本公开的实施例提供的包装套筒的灭菌方法的流程图；
图2为本公开的实施例提供的堆叠设置的包装套筒示意图；
图3为本公开的实施例提供的捆件示意图；
图4为本公开的实施例提供的包装套筒在灭菌过程中的传输路径图；
图5为本公开的实施例提供的包装套筒的质量检测方法的流程图；
图6为本公开的实施例提供的液体食品的灌装方法的流程图；
图7为本公开的实施例提供的灭菌检测位置示意图。
为使本公开的实施例的目的、技术方案和优点更加清楚，下面将结合本公开的实施例的附图，对本公开的实施例的技术方案进行清楚、完整地描述。需要注意的是，附图中各图形的尺寸和形状不反映真实比例，目的只是示意说明本公开的内容。并且自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。为了保持本公开的实施例的以下说明清楚且简明，本公开省略了已知功能和已知部件的详细说明。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开的说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“内”、“外”、“上”、“下”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
包装套筒以堆叠的方式被包装在包装膜等外包装中，然后被运输到灌装饮料的灌装地点进行灌装。外包装可能会吸附一些微生物和杂质，这些微生物和杂质会污染外包装内的包装套筒。相关技术中在灌装前采用双氧水对包装套筒进行灭菌，双氧水虽然易分解，但是不能快速干燥，致使包装套筒表面会残留双氧水，即使后续增加无菌空气吹干工序，也不能保证在包装套筒表面完全无双氧水残留，难以满足越来越严格的食品安全规范。
为了解决相关技术中存在的上述技术问题，本公开的实施例提供了一种包装套筒的灭菌方法，如图1所示，包括以下步骤：
S101、提供堆叠设置的多个包装套筒S(如图2所示)，包装套筒包括未封合的顶部和底部；可选地，如图3所示，在运输过程中堆叠设置的多个包装套筒S可由包装膜RSW等外包装围绕封装形成捆件B，在一些实施例中，包
装膜RSW的纵向抗拉强度≥40MPa，横向抗拉强度≥30MPa，纵向断裂伸长率≥200％，横向断裂伸长率≥400％，160℃下的纵向收缩率65％～90％，160℃下的横向收缩率15％～35％，以通过该包装膜RSW提高封装质量，减少包装膜RSW因破损造成包装套筒质量受损，或因包装膜RSW收缩不良造成包装套筒松散等问题的发生。在一些实施例中，包装膜RSW包括焊缝WS和突出端P，包装膜RSW内还可以具有装载载体C，该装载载体C可以被放置在包装套筒S上并且因此被布置在包装套筒S和包装膜RSW之间。装载载体C旨在容纳活性物质(例如，杀菌剂)并将该活性物质引入到成捆件B中。例如，装载载体C可以被构造为平板。装载载体C仅是可选的，因此，根据本公开的成捆件B可以具有或可以不具有装载载体C。
S102、采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌。
电子束辐照灭菌是利用电子加速器的高压电场加速产生的高能电子束，瞬间改变微生物结构，使之失去生物活性的一种高新技术手段。被电子束辐照灭菌的物品只接收了电子束能量，是物理灭菌过程，不添加化学物质，没有化学残留。基于此，在本公开的实施例提供的上述灭菌方法中，采用电子束对包装套筒进行辐照灭菌，可在有效灭菌的同时，避免包装套筒表面有化学残留，符合食品安全规范。另外，相关技术中的电子束辐照灭菌采用能量为10MeV～30MeV的电子束，本公开的实施例采用能量低于10MeV的电子束即可实现良好的灭菌效果；较低能量的电子束对包装套筒的影响较小，且对操作人员而言更安全。
在一些实施例中，如图4所示，可采用传输带CB等将包装套筒S传递至辐照灭菌区IS，并在辐照灭菌区IS内对包装套筒S进行电子束辐照灭菌。可选地，上述步骤S102、采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌，具体可以为：采用由电子加速器产生的能量为0.3MeV～0.8MeV(例如0.5MeV)的电子束对包装套筒进行辐照灭菌。在一些实施例中，电子束宽度为16mm。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，在执行步骤S102、采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌的同时，还可以按照60m/min(例如15m/min)以内的速度移动包装套
筒，以使得电子束可以对包装套筒进行充分灭菌。
在一些实施例中，在本公开的实施例提供的上述灭菌方法中，在执行步骤S102、在采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌的同时，还可以控制包装套筒对电子束的吸收剂量(Dose)为4KGY～10KGY，例如4KGY、6KGY、10KGY等。在该剂量下，不仅可以有效灭菌，还可以避免包装套筒过多照射电子束而发生膜层降解、分层、密封性差等不良。
考虑到即使电子束的能量较低，其也具有一定的辐射，为了更好地保障灭菌操作人员的安全，在本公开的实施例提供的上述灭菌方法中，可以至少在执行步骤S102、采用由电子加速器产生的能量小于10MeV的电子束对包装套筒进行辐照灭菌的同时，利用钢板对辐照灭菌区IS及辐照灭菌区IS预设距离内的区域SD进行屏蔽(如图4所示)。值得注意的是，为避免频繁拆卸钢板，本公开中的钢板可一直固定在灭菌设备上，并在电子束辐照灭菌的时间段内对电子束进行屏蔽。另外，相关技术中因电子束的能量较大，故需采用混凝土等进行屏蔽；本公开中电子束的能量较小，可采用钢板等进行屏蔽，成本更低。
考虑到电子辐照灭菌可能会对包装套筒中的聚乙烯(PE)等膜层造成降解，致使包装套筒出现气味较重、分层、密封性不好等不良，因此，为验证本公开提供的上述灭菌方法的灭菌效果及其对包装套筒的影响，本公开的实施例提供了一种包装套筒的质量检测方法，如图5所示，可以包括以下步骤：
S501、提供采用本公开的实施例提供的上述灭菌方法处理后的第一包装套筒；
S502、对第一包装套筒的顶部和/或底部进行灭菌率(Sterilization rate)测试、气味(Odour)测试、密封强度(Sealing Strength)测试和分层(Delamination)测试，并判断测试结果是否满足参考标准，若测试结果满足参考标准的要求，则确定第一包装套筒合格，否则确定第一包装套筒不合格。
可选地，在本公开的实施例提供的上述质量检测方法中，灭菌率测试的参考标准可根据行业规范和客户要求进行拟定，例如灭菌率大于90％，相当于杀灭对数值(log reduction)大于1；气味测试、密封强度测试和分层测试的相应参考标准可以灭菌处理前的包装套筒的相应测试结果为基准进行拟定。基于此，在本公开的实施例提供的上述质量检测方法中，还可以提供未经灭菌处理
的第二包装套筒(相当于灭菌处理前的第一包装套筒)，并对第二包装套筒的顶部和/或底部进行气味测试、密封强度测试和分层测试，根据第二包装套筒的测试结果拟定相应测试的参考标准，例如根据第二包装套筒的气味测试结果拟定气味测试的参考标准，根据第二包装套筒的密封强度测试结果拟定密封强度测试的参考标准，根据第二包装套筒的分层测试结果拟定分层测试的参考标准。
本公开中包装套筒可以为由层叠设置的内覆盖层、阻隔层、复合层、载体层和外覆盖层构成的层结构。其中，内覆盖层的材料可包括两个以上内覆盖层聚合物，内覆盖层聚合物为聚烯烃材料。可选地，内覆盖层聚合物为高密度聚烯烃、低密度聚烯烃和茂金属聚烯烃中的一种。优选地，聚烯烃为聚乙烯。可选地，内覆盖层聚合物为高密度聚乙烯、低密度聚乙烯和茂金属聚乙烯(mPE)中的一种。可选地，茂金属聚乙烯包括线型低密度聚乙烯(LLDPE)和较低密度聚乙烯(VLDPE)。
阻隔层可具有遮光、阻水、阻氧中的至少一种作用，阻隔层的材料可以包括铝箔(Al)、铁箔(Fe)、铜箔(Cu)、氧化铝(AlOx)、氧化镁(MgO)、氧化钛(TiO2)、氧化锆(ZrO2)、氧化锡(SnO、Sn2O3、SnO2)、氧化锌(ZnO)、氧化铟(InO、In2O3、InO2)、氧化铟锡(ITO)、锡酸锌(Zn2SnO4)、氧化硅(SiOy)、氮化硅(Si3N4)、氮氧化硅(SiON)、碳化硅(SiC)、碳氧化硅(SiqOmCn，q的取值为15～30，m的取值为25～60，n的取值为15～50)、有机硅化合物(例如四甲氧基硅烷Si(OCH3)4，四乙氧基硅烷Si(OC2H5)4，四丙氧基硅烷Si(OC3H7)4，四丁氧基硅烷硅氧烷Si(OC4H9)4等硅氧烷)、乙烯基聚合物、聚丙烯酸等中的至少一种，可选地，乙烯基聚合物为聚偏二氯乙烯(PVdC)和/或聚乙烯醇(PVOH)。
复合层可以具有遮光效果，复合层的材料可以包括遮光材料，示例性地，遮光材料可以为具有吸光作用的炭黑色母粒等，也可以为具有反光作用的二氧化钛色母粒等，具体地，可通过在聚乙烯层中掺杂遮光材料制备复合层。
载体层具有足够的强度和刚度，载体层可选自硬纸板、纸板和纸中的一种或任意组合；在一些实施例中，载体层还可用于印刷各种图案和字符等。
外覆盖层包含聚乙烯(PE)和/或聚丙烯(PP)；可选地，聚乙烯(PE)包含低密度聚乙烯(LDPE)和/或高密度聚乙烯(HDPE)；在外覆盖层包含低
密度聚乙烯的情况下，低密度聚乙烯在外覆盖层中的质量占比可以大于等于50％，例如低密度聚乙烯在外覆盖层中的质量占比为50％、60％、70％、80％、90％、100％等。本公开中外覆盖层的材料优选为低密度聚乙烯。
表1示出了在吸收剂量分别为0KGY(相当于未灭菌)、4KGY、6KGY、10KGY的情况下，两批(分别标记为样品1和样品2)包装套筒2mm高的顶部灭菌数据，其中，菌落数表示将顶部的层结构搅碎并在平板计数琼脂(PC-Agar)培养基中维持37℃的温度条件培养2天(2d)后每公克碎屑中含有的细菌菌落总数(cfu/g Sleeve)，杀灭对数值是当菌落数以10为底的对数表示时，灭菌前后菌落数的对数值之差。
由表1可见，在吸收剂量为0KGY的情况下，菌落数在70以上；在吸收剂量为4KGY～10KGY的情况下，菌落数减少至5以下，灭菌对数值大于1，实现了较好的灭菌效果。且在吸收剂量分别为6KGY和10KGY的情况下，菌落数减少至1以下，且灭菌对数值大于1，因此，两种吸收剂量下的灭菌效果相当；在具体实施时，为节约成本、保证生产安全，可选用6KGY的吸收剂量进行灭菌。
表1
表2示出了在吸收剂量分别为0KGY(相当于未灭菌)、4KGY、6KGY、10KGY的情况下，包装套筒的灭菌率测试、气味测试、密封强度测试、以及
分层测试的测试结果。其中，表2的样品0表示未经灭菌处理的包装套筒(可以相当于灭菌前的包装套筒)，样品1、样品2和样品3分别对应吸收剂量为4KGY、6KGY、10KGY的包装套筒，样品0的气味测试、密封强度测试、以及分层测试的可作为样品1、样品2和样品3相应测试的参考标准；灭菌率所在列的杀灭对数值(log reduction)越大，表示灭菌效果越好；气味所在列的评分越高表示气味越明显，合格“Yes”表示气味在可接受的范围内；密封强度所在列的数值越大表示密封性越好；分层所在列的“No”表示无分层或分层不明显、可忽略。
由表2中灭菌率所在列的数据可知，在吸收剂量为4KGY～10KGY的情况下，灭菌对数值大于1，均实现了较好的灭菌效果。对比表2中样品0、样品1、样品2、样品3的气味测试评分可知，经不同剂量灭菌处理后的样品1、样品2、样品3的气味评分与未经处理的样品0气味评分差异较小，均处于可接受的合格范围内。对比表2中样品0、样品1、样品2、样品3的气味测试评分可知，经不同剂量灭菌处理后的样品1、样品2、样品3的密封强度与未经处理的样品0密封强度几乎无差异，意味着灭菌处理后的包装套筒的密封效果较好。对比表2中样品0、样品1、样品2、样品3的分层列的测试结果可知，经不同剂量灭菌处理后的样品1、样品2、样品3，以及未经灭菌处理的样品0均未出现分层不良。由此说明，本公开提供的灭菌方法可兼顾良好的灭菌效果、以及包装套筒的质量。
表2
基于同一发明构思，本公开的实施例还提供了一种液体食品(例如纯牛奶、酸奶、饮料等)的灌装方法，由于该灌装方法解决问题的原理与上述灭菌方法解决问题的原理相似，因此，本公开的实施例提供的该灌装方法的实施可以参见本公开的实施例提供的上述灭菌方法的实施，重复之处不再赘述。
在一些实施例中，本公开的实施例提供的液体食品的灌装方法，如图6所示，包括以下步骤：
S601、采用本公开的实施例提供的上述灭菌方法对包装套筒进行灭菌；
S602、封合包装套筒的底部，并保证包装套筒的顶部敞开；
S603、将液体食品由包装套筒的顶部灌入包装套筒内；
S604、封合包装套筒的顶部。
在执行本公开的实施例提供的上述步骤S604、封合包装套筒的顶部的过程中，可借助超声波电极和铁砧通过压合密封包装套筒的顶部。然而在借助超声波进行顶部密封时，灰尘可能会从顶部的各叠层材料中抛出并污染产线上后续尚未封合的包装套筒顶部。可选地，包装套筒包括纵向接缝，包装套筒的顶部在纵向接缝延伸方向上的长度为2mm～10mm，优选2mm～6mm，例如2mm、4mm、6mm等。于是，在本公开的实施例提供的上述灌装方法中，在执行步骤S603、将液体食品由包装套筒的顶部灌入包装套筒内之后，且在执行步骤S604、封合包装套筒的顶部之前，还可以采用本公开实施例提供的上述灭菌方法对包装套筒的顶部进行辐照灭菌，从而可以对顶部上附着的灰尘进行有效杀菌，使得顶部的带菌量比其他位置(例如包装套筒的底部、底部与顶部之间的中间部分)的带菌量更低，随之降低了灰尘对尚未封合顶部的污染风险。本公开中仅对长度为2mm～10mm的顶部进行辐照灭菌，尽可能减少了电子束对内部液体食品的辐射，从而不会影响液体食品的风味，且不会造成液体食品的营养流失。
在一些实施例中，在本公开的实施例提供的上述灌装方法中，在执行步骤S603、将液体食品由包装套筒的顶部灌入包装套筒内之后，且在执行步骤：采用本公开的实施例提供的上述灭菌方法对包装套筒的顶部进行辐照灭菌之前，还可以清除包装套筒的顶部上的灰尘，这就使得电子束更容易对顶部进行灭菌；此外，还可以减少灰尘对灌装机、特别是密封工具的污染，并且延长了密封工具的维护间隔时间和/或清洁间隔时间。
基于同一发明构思，本公开的实施例提供了一种包装套筒，该包装套筒采用本公开的实施例提供的上述灭菌方法进行灭菌，该包装套筒2～6mm高的顶部的带菌量低于顶部之外其他位置的带菌量。
表3示出了在吸收剂量为6KGY条件下，对高度为4mm以内的顶部进行辐照灭菌后，自顶部至底部共五个不同位置(如图7所示)的灭菌数据。在具体实施时，可将五个位置的层结构分别搅碎并在平板计数琼脂(PC-Agar)培养基中维持37℃的温度条件培养2天(2d)后检测每公克碎屑中含有的细菌菌落总数(cfu/g Sleeve)。由表3可见，高度为4mm以内的顶部菌落数均小于1，但高度在50mm～60mm范围内的顶部菌落数达到108，中间部分和高度为2mm的底部菌落数高达200，对比可知，本公开中对高度为4mm以内的顶部进行辐照灭菌后的带菌量远低于其他位置(例如高度在50mm～60mm范围内的顶部、中间部分和高度为2mm的底部)的带菌量。
表3
尽管本公开已描述了优选实施例，但应当理解的是，本领域的技术人员可以对本公开的实施例进行各种改动和变型而不脱离本公开的实施例的精神和范围。这样，倘若本公开的实施例的这些修改和变型属于本公开的权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。
Claims (11)
- 一种包装套筒的灭菌方法，其特征在于，包括：提供堆叠设置的多个包装套筒，所述包装套筒包括未封合的顶部和底部；采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌。
- 如权利要求1所述的灭菌方法，其特征在于，采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌，具体包括：采用由电子加速器产生的能量为0.3MeV～0.8MeV的电子束对所述包装套筒进行辐照灭菌。
- 如权利要求1或2所述的灭菌方法，其特征在于，在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，还包括：以60m/min以内的速度移动所述包装套筒。
- 如权利要求1或2所述的灭菌方法，其特征在于，在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，还包括：控制所述包装套筒对电子束的吸收剂量为4KGY～10KGY。
- 如权利要求1或2所述的灭菌方法，其特征在于，至少在采用由电子加速器产生的能量小于10MeV的电子束对所述包装套筒进行辐照灭菌的同时，利用钢板对辐照灭菌区及所述辐照灭菌区预设距离内的区域进行屏蔽。
- 一种包装套筒的质量检测方法，其特征在于，包括：提供采用如权利要求1～5任一项所述的灭菌方法处理后的第一包装套筒；对所述第一包装套筒的顶部和/或底部进行灭菌率测试、气味测试、密封强度测试和分层测试，并判断测试结果是否满足参考标准，若测试结果满足参考标准的要求，则确定所述第一包装套筒合格，否则确定所述第一包装套筒不合格。
- 如权利要求6所述的质量检测方法，其特征在于，还包括：提供未经灭菌处理的第二包装套筒，并对所述第二包装套筒的顶部和/或底部进行气味测试、密封强度测试和分层测试，根据所述第二包装套筒的测试结果拟定相应测试的参考标准。
- 一种液体食品的灌装方法，其特征在于，包括：采用如权利要求1～5任一项所述的灭菌方法对包装套筒进行灭菌；封合所述包装套筒的底部，并保证所述包装套筒的顶部敞开；将液体食品由所述包装套筒的顶部灌入所述包装套筒内；封合所述包装套筒的顶部。
- 如权利要求8所述的灌装方法，其特征在于，在将液体食品由所述包装套筒的顶部灌入所述包装套筒内之后，且在封合所述包装套筒的顶部之前，还包括：采用如权利要求1～5任一项所述的灭菌方法对所述包装套筒的顶部进行辐照灭菌，所述包装套筒包括纵向接缝，所述包装套筒的顶部在纵向接缝延伸方向上的长度为2mm～10mm。
- 如权利要求9所述的灌装方法，其特征在于，在将液体食品由所述包装套筒的顶部灌入所述包装套筒内之后，且在采用如权利要求1～5任一项所述的灭菌方法对所述包装套筒的顶部进行辐照灭菌之前，还包括：清除所述包装套筒的顶部上的灰尘。
- 一种包装套筒，其特征在于，所述包装套筒采用如权利要求1～5任一项所述的灭菌方法进行灭菌，所述包装套筒2～6mm高的顶部的带菌量低于所述顶部之外其他位置的带菌量。
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| CN115626344A (zh) * | 2022-10-31 | 2023-01-20 | 康美包（苏州）有限公司 | 包装套筒及其灭菌和质量检测方法、液体食品的灌装方法 |
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- 2022-10-31 CN CN202211345449.2A patent/CN115626344A/zh active Pending
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