EP1020363A2 - Procédé et dispositif de stérilisation de matériau d'emballage pour produits alimentaires - Google Patents

Procédé et dispositif de stérilisation de matériau d'emballage pour produits alimentaires Download PDF

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Publication number
EP1020363A2
EP1020363A2 EP00300035A EP00300035A EP1020363A2 EP 1020363 A2 EP1020363 A2 EP 1020363A2 EP 00300035 A EP00300035 A EP 00300035A EP 00300035 A EP00300035 A EP 00300035A EP 1020363 A2 EP1020363 A2 EP 1020363A2
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EP
European Patent Office
Prior art keywords
packaging material
food packaging
sterilizing
liquid
antibacterial effect
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00300035A
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German (de)
English (en)
Other versions
EP1020363A3 (fr
Inventor
Hiroaki Hada
Tadao Akai
Michio Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shikoku Kakoki Co Ltd
Original Assignee
Shikoku Kakoki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shikoku Kakoki Co Ltd filed Critical Shikoku Kakoki Co Ltd
Publication of EP1020363A2 publication Critical patent/EP1020363A2/fr
Publication of EP1020363A3 publication Critical patent/EP1020363A3/fr
Withdrawn legal-status Critical Current

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    • 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

Definitions

  • the present invention concerns a method of and an apparatus for sterilizing food packaging materials used in a food packing and packaging machine and, more in particular, it relates to a method of and an apparatus capable for sterilizing food packaging materials at a speed corresponding to a line speed of a packing and packaging machine by using a liquid having an antibacterial effect and pulse irradiation at high power from xenon lamps together.
  • UV-ray irradiation has been well-known as a method of sterilizing food packaging materials.
  • the sterilization by the irradiation of UV-rays is a surface sterilization and involves problems that sterilization is not obtained for non-irradiated areas and in case the energy of UV-rays is low, when an obstacle is present or when the bacteria layer is thick, UV-rays can not transmit the material, so that no sufficient sterilizing effect can be obtained.
  • a sterilization method of using the above-mentioned aqueous hydrogen peroxide and UV-ray irradiation together has also been well-known (refer to Japanese Patent Laid-Open No. 113530/1981, Japanese Patent Publication No. 66142/1993 and Japanese Patent Laid-Open No. 156/1995).
  • this sterilizing method involves a problem inherent to UV-ray irradiation, that is, the sterilizing effect is sometimes low depending on the difference of sensitivity of microorganisms to UV-rays.
  • Japanese Patent Publication No. 58874/1985 discloses a sterilization method of emitting light from a flashing discharge lamp, of which light emitting constituents are rare gases, irradiating the emitted light through a quartz wall to products to be processed which are transported successively to reach a sterilizing station thereby sterilizing bacteria on the surface of the products to be processed.
  • the patent publication discloses that a higher sterilizing effect than that of UV-ray lamps can be obtained in this sterilizing method by light emission pulses for 8 sec (emission for 40 cycles) and same sterilizing effects can be obtained even with fewer frequency of light emission as the light emission energy is increased.
  • the sterilizing effect by the xenon lamps depends on an electric energy (voltage) inputted to a lamp, capacity of a condenser, pulse width, irradiation distance and the number of irradiation cycles, and that the sterilizing effect is enhanced more as the electric energy (voltage) and the number of irradiation cycles are increased and as the pulse width and the irradiation distance are decreased.
  • Light emission from a xenon lamp has a feature in emitting an extremely large amount of light in an extremely short period of time and it is said that the instantaneous light emission power is as high as from 10 4 to 10 7 times the power of existent UV-ray sterilizing lamps. Therefore, the sterilizing method using high power pulses from the xenon lamps has a sufficient sterilizing power also to Aspergillus niger and the like, for which UV-ray irradiation is said to be able to provide only poor sterilizing power, so it can be said to be an excellent sterilizing method. However, it requires a number of light emission cycles in order to obtain a high sterilizing power at a low light emission energy.
  • An object of this invention is to provide a method of and an apparatus for sterilization that can conduct sterilization within a processing time corresponding to the line speed of a packing and packaging machine, and prevent odoriferosity and deterioration of sealing strength and scorching on the printed surfaces caused by irradiation of high power pulses at a high light emission energy, in case of applying a sterilizing method using high power pulses from xenon lamps to food packaging materials.
  • the present inventors have made an earnest study to overcome the foregoing problems and have accomplished the present invention based on the finding that sterilization can be conducted in a sterilization for food packaging materials of irradiating high power pulses by xenon lamps at a relatively low light emission energy not causing odor, deterioration of sealing strength and scorching on the printed surfaces and within a processing time corresponding to a line speed of a packaging and packing machine by previously depositing a liquid having an antibacterial effect, for example, an aqueous hydrogen peroxide at a concentration of 0.1 to 10% by weight on the surface of the food packaging material to be irradiated.
  • a liquid having an antibacterial effect for example, an aqueous hydrogen peroxide at a concentration of 0.1 to 10% by weight
  • this invention provides a method of sterilizing a food packaging material which comprises irradiating high power pulses by using the xenon lamps in a state in which a liquid having an antibacterial effect is deposited on the food packaging material.
  • the liquid having the antibacterial effect is selected from aqueous peracetic acid, aqueous hydrogen peroxide containing peracetic acid, aqueous hydrogen peroxide, ozone-containing water, ethanol, sodium chloride solution, electrolyzed acidic water, and an organic or inorganic acid solution.
  • the liquid having an antibacterial effect comprising at a concentration of an effective ingredient of 0.1 to 10% by weight is used as the liquid having the antibacterial effect.
  • the present invention provides an apparatus for sterilizing a food packaging material comprising,
  • the food packaging material has a polyolefin layer on the surface.
  • the means for depositing the liquid having the antibacterial effect on the food packaging material is one of a spray device of a liquid having the antibacterial effect on the food packaging material, a means for coating the liquid having the antibacterial effect and an immersion device of dipping the material into the liquid having the antibacterial effect.
  • the xenon lamps have spectral characteristics having continuous spectra of a wide range of wavelength from ultraviolet to infrared regions.
  • the xenon lamps have a light emission energy of from 50 to 1000 Joule.
  • the sterilizing apparatus for the food packaging material has a preheating section capable of heating the surface temperature of the food packaging material to 40 - 80°C in a step prior to deposition of the liquid having the antibacterial effect on the food packaging material.
  • the sterilizing apparatus for the food packaging material has a drying device for removing the liquid having the antibacterial effect deposited on the food packaging material in a step after the irradiation of high power pulses by using the xenon lamps to the food packaging material deposited with the liquid having the antibacterial effect.
  • the food packaging material as an objective of sterilization in this invention can include those packaging materials in which a polyolefin layer such as polyethylene or polypropylene is laminated to a paper layer and/or aluminum foil layer on the surface, packaging materials comprising plastic materials such as polyethylene, polystyrene, polypropylene and PET (polyethylene terephthalate).
  • packaging materials comprising plastic materials such as polyethylene, polystyrene, polypropylene and PET (polyethylene terephthalate).
  • the effect of this invention can be attained advantageously for those food packaging materials having a polyolefin layer such as the same of polyethylene on the surface, which causes problems such as odoriferosity, deterioration of seal strength and scorching on the printed surfaces when sterilization is applied by merely using high power pulse irradiation of the xenon lamps.
  • any liquid having the antibacterial effect is usable in this invention so long as it has an antibacterial effect or sterilizing effect in a liquid state such as a liquid antibacterial ingredient or a solid antibacterial ingredient dissolved in the form of an aqueous solution and it specifically includes, for example, aqueous peracetic acid, aqueous hydrogen peroxide containing peracetic acid, aqueous hydrogen peroxide, ozone-containing water, ethanol, sodium chloride solution, electrolyzed acidic water, and an organic acid solution or inorganic acid solution.
  • the liquid having the antibacterial effect as described above is preferably at a concentration of the effective ingredient usually from 0.1 to 10% by weight, depending on the kind of antibacterial ingredient, in view of shortening of the sterilizing time and removable of residual antibacterial ingredient.
  • the deposition method can include, for example, a method of using an apparatus for spraying a liquid having an antibacterial effect to a food packaging material and a method of using an apparatus for coating a liquid having an antibacterial effect or a method of immersing the material into a liquid having an antibacterial effect.
  • the xenon lamps capable of irradiating high power pulses can be mentioned and such xenon lamps can include, for concrete example, those described in Japanese Patent Publication No. 58874/1985 or PURE BRIGHT (manufactured by Pure Pulse Technology Co.).
  • the xenon lamps used in this invention preferably have spectral characteristics having continuous spectra for a wide range of wavelength from ultraviolet to infrared regions, particularly, for far ultraviolet region (200 - 300 nm), near ultraviolet region (300 - 380 nm), visible light region (380 - 780 nm) and infrared region (780 - 1100 nm). Further, the xenon lamps having a light emission energy from 50 to 1000 Joule/lamp are, preferably used in view of the cost for the apparatus, scale of the apparatus and the working life of the lamp.
  • the damages to the packaging material can be moderated by lowering the light emission energy per once compared with the case of sterilization by merely using the high power pulse irradiation from the xenon lamp, and the sterilizing time can be shortened since a high sterilizing effect can be obtained even when the number of emission cycles is decreased.
  • the apparatus for sterilizing the food packaging material has a means of depositing a liquid having an antibacterial effect on a food packaging material and a means for irradiating high power pulses by using xenon lamps to the food packaging material deposited with the liquid having the antibacterial effect. It is preferred to dispose a pre-heating section capable of heating the surface temperature of the food packaging material to 40 - 80°C in a step before depositing the liquid having the antibacterial effect on the food packaging material, and a drying device for removing the liquid having the antibacterial effect deposited on the food packaging material in the step after irradiation of high power pulses by using the xenon lamps to the food packaging material deposited with the liquid having the antibacterial effect.
  • Provision of the pre-heating section can further enhance the antibacterial effect due to the liquid having the antibacterial effect and accelerate removal of the antibacterial ingredient in the drying by heating.
  • known devices such as described in the Japanese Patent Publication No. 4078/1973, Japanese Patent Laid-Open No. 113530/1981, Japanese Patent Publication No. 66142/1993, and Japanese Patent Laid-Open No. 156/1995 can be used.
  • Fig. 1 is an explanatory view in which the apparatus is applied to the gable roof top type paper container.
  • cartons C each opened at an upper end, which is a bottomed cylinder as an article to be processed, are conveyed successively articles to be processed to a sterilizing station by way of a continuous or intermittently moving conveyor 1
  • a liquid having an antibacterial effect is sprayed by a liquid spray device 3 having a spray nozzle 2 to the inside of the cartons C, and then high power pulse light is irradiated from xenon lamps 4 through an irradiation window 5 made of quartz glass into the cartons C in a state where the liquid having an antibacterial effect is deposited thereto.
  • drying nozzles 6 are introduced into the cartons C, aseptic air heated by a drying heater 7 is sprayed from the drying nozzles 6 into the cartons C to remove the liquid in the cartons C by hot blow drying.
  • FIG. 2 is an explanatory view in which an apparatus for sterilizing a food packaging material according to this invention is applied to a plate web for brick-shaped paper container.
  • a plate web W as an article to be processed is unwound from a rolled state and conveyed continuously, immersed in an immersion tank 8 filled with a liquid having an antibacterial effect, irradiated on both the surfaces of the plate web W by a high power pulse light from xenon lamps 4 in a state where a liquid having an antibacterial effect is deposited thereon, then an aseptic air heated by a drying heater is sprayed from an air knife 9 to both the surfaces of the plate web W and the liquid is removed by hot blow drying.
  • the plate web W applied with the sterilizing treatment described above is conveyed within an aseptic chamber and then shaped into a cylindrical form, to which a liquid food such as juice is filled from a filling pipe 10, separated from the seal by a sealing jaw 11 and then formed into a final product as a brick-shaped container 12.
  • Bacillus subtilis var globigii spore, IFO 13721 was used as target bacteria and a liquid suspension of spores of the bacteria was prepared, which was spot-inoculated to a sterilized packaging material strip by 10 ⁇ l followed by drying, to prepare two kind of bacteria inoculated strips with a initial number of bacteria at 2.3 ⁇ 10 4 cfu/strip and 2.2 ⁇ 10 6 cfu/strip, and served for a sterilizing test.
  • Aqueous hydrogen peroxide at a concentration of 0.1% by weight and 1.0% by weight was sprayed for one sec to each of the bacteria-inoculated strips respectively by hand spray, fixed at a position at 2 cm just beneath the xenon lamps, irradiated with high power pulses from xenon lamps for 1 sec, 5 sec and 10 sec in a state deposited with the aqueous hydrogen peroxide, the strip was recovered in 10 ml of a DTB liquid culture medium, cultivated at 35°C for 10 days to confirm viability/mortality of bacteria.
  • the high power pulses were irradiated by using four xenon lamps and irradiation was conducted under the conditions with a light emission energy per once of 120 Joule/lamp, at light emission for three times in one sec, and an effective irradiation window of area of 30 ⁇ 30 cm.
  • the DTB liquid culture medium for recovery with addition of catalase at 5000 units/10 ml (culture) for decomposition of hydrogen peroxide was used. Further, for observing the effect in the combined use with aqueous hydrogen peroxide, a sterilizing test was conducted also for the specimens subjected only to the xenon lamp irradiation without spraying the aqueous hydrogen peroxide. The results for the judgement of viability/mortality of bacteria are shown in Table 1 and Table 2.
  • Example 2 The same sterilizing test as in Example 1 was conducted for bacteria-inoculated strips with the initial number of bacteria at 2.3 ⁇ 10 4 cfu/strip prepared in Example 1, which was appended to the bottom of 1L cartons each opened at an upper end, which is a bottomed cylinder.
  • Aqueous hydrogen peroxide at a concentration of 0.1% by weight and 1.0% by weight were respectively sprayed for one sec by hand spray, the bacteria-inoculated strips were fixed at a position 26 cm just beneath the xenon lamps, high power pulses from the xenon lamps were irradiated for 5 sec, 10 sec and 15 sec in a state where the aqueous hydrogen peroxide was deposited, then the strips were recovered into 10 ml of a DTB liquid culture medium, cultivated at 35°C for 10 days to confirm viability/mortality of bacteria. The results are shown in Table 3.
  • a sterilizing test was conducted using a bacteria-inoculated strip prepared at an initial number of bacteria of 1.7 ⁇ 10 6 cfu/strip, and using the following liquid having the antibacterial function instead of the aqueous hydrogen peroxide.
  • Two xenon lamps were used for high power pulses from the xenon lamp, and the light was irradiated for 0.6 sec, 3 sec and 6 sec under the conditions with a light emission energy per once of 200 Joule/lamp, at light emission for 5 times in 1 sec and with an effective irradiation window area of 30 ⁇ 30 cm.
  • Other procedures were the same as those in Example 1. The results are shown in Table 4.
  • Aqueous hydrogen peroxide containing peracetic acid 0.06 wt% of peracetic acid, 0.08 wt% of hydrogen peroxide, 0.2 wt% of acetic acid
  • Aqueous acetic acid 1 wt%
  • Ethanol 70%
  • Sodium chloride solution 1 wt%
  • Electrolyzed acidic water 50 ppm Lactic acid solution: 1 wt%
  • Citric acid solution 1 wt%
  • a higher sterilizing effect can be obtained within a much shorter period of time, compared with the hitherto methods, by irradiating high power pulses using the xenon lamps in a state of depositing the liquid having the antibacterial effect, sterilization can be conducted within a processing time corresponding to the line speed of the packing and packaging machine. Further, also in case of requiring a high energy when sterilization is conducted only by the xenon lamps, since a higher sterilizing effect can be obtained by using xenon lamps of a low energy type according to this invention, the cost can be lowered. Further, compared with the case of using only the liquid having the antibacterial effect, since a higher sterilizing effect can be obtained even by using a liquid at low concentration, the liquid can be removed easily after use and safety upon use is also improved.
  • the sterilizing time can be shortened as described above, and the damages to the packaging material is decreased, as well as damages to the packaging material by the high power pulses can be moderated and odoriferosity, deterioration of the seal strength and scorching caused on the printed surfaces can be prevented, by covering the surface of the products to be irradiated with the liquid.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
EP00300035A 1999-01-12 2000-01-06 Procédé et dispositif de stérilisation de matériau d'emballage pour produits alimentaires Withdrawn EP1020363A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11005463A JP2000203535A (ja) 1999-01-12 1999-01-12 食品包装材料の殺菌方法及びその装置
JP546399 1999-01-12

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EP1020363A2 true EP1020363A2 (fr) 2000-07-19
EP1020363A3 EP1020363A3 (fr) 2002-10-16

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20015853U1 (de) * 2000-09-13 2001-10-18 Gesslauer Rudolf Vorrichtung zur Reinigung und Desinfektion von mit Lebensmitteln in Kontakt kommenden Flächen
US6517776B1 (en) 2000-11-03 2003-02-11 Chevron Phillips Chemical Company Lp UV oxygen scavenging initiation in angular preformed packaging articles
US6818150B2 (en) 2000-12-22 2004-11-16 Chevron Phillips Chemical Company Lp UV- or heat-triggered low oxygen packaging system employing an oxidizable polymer resin and a peroxide
EP1633405A2 (fr) * 2003-02-28 2006-03-15 Advanced Light Technologies LLC Desinfection, destruction de croissance neoplasique, et sterilisation par absorption differentielle d'energie electromagnetique
EP1918208A1 (fr) * 2006-10-30 2008-05-07 Heraeus Noblelight GmbH Installation de désinfection de matériaux d'emballage
US7504045B2 (en) 2005-06-07 2009-03-17 Cryovac, Inc. Method of triggering a film containing an oxygen scavenger
CN103303529A (zh) * 2013-07-08 2013-09-18 中国农业科学院农产品加工研究所 一种食品包装盒杀菌装置
CN109264104A (zh) * 2018-09-18 2019-01-25 徐鹏 环保有机食品包装设备
US10959441B2 (en) 2018-04-18 2021-03-30 Xenon Corporation Ultraviolet treatment of food products to kill microorganisms while retaining fruit bloom
US11174107B2 (en) 2019-03-22 2021-11-16 Xenon Corporation Flash lamp system for disinfecting conveyors

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5831673B2 (ja) * 2010-01-22 2015-12-09 東洋製罐株式会社 空間表面の殺菌方法
CN113368282B (zh) * 2021-03-18 2023-08-08 郑州圣华药物食品技术开发有限公司 用氙准分子光源制备臭氧的脉动消毒方法及其装备

Citations (6)

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WO1988003369A1 (fr) * 1986-11-13 1988-05-19 Maxwell Laboratories, Inc. Procedes et appareil de conservation de produits alimentaires
EP0411970A1 (fr) * 1989-06-26 1991-02-06 FMC Corporation Stérilisation de récipients par peroxyde d'hydrogène, peracides et radiation UV
EP0445386A1 (fr) * 1990-03-08 1991-09-11 FMC Corporation Procédé pour stériliser une bande de matériau d'emballage
WO1997035768A1 (fr) * 1996-03-27 1997-10-02 Tetra Laval Holdings & Finance S.A. Procede et dispositif de sterilisation d'emballages de produits alimentaires
US5786598A (en) * 1996-05-22 1998-07-28 Purepulse Technologies, Inc. Sterilization of packages and their contents using high-intensity, short-duration pulses of incoherent, polychromatic light in a broad spectrum
US5843374A (en) * 1996-10-11 1998-12-01 Tetra Laval Holdings & Finance, Sa Method and apparatus for sterilizing packaging

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988003369A1 (fr) * 1986-11-13 1988-05-19 Maxwell Laboratories, Inc. Procedes et appareil de conservation de produits alimentaires
EP0411970A1 (fr) * 1989-06-26 1991-02-06 FMC Corporation Stérilisation de récipients par peroxyde d'hydrogène, peracides et radiation UV
EP0445386A1 (fr) * 1990-03-08 1991-09-11 FMC Corporation Procédé pour stériliser une bande de matériau d'emballage
WO1997035768A1 (fr) * 1996-03-27 1997-10-02 Tetra Laval Holdings & Finance S.A. Procede et dispositif de sterilisation d'emballages de produits alimentaires
US5786598A (en) * 1996-05-22 1998-07-28 Purepulse Technologies, Inc. Sterilization of packages and their contents using high-intensity, short-duration pulses of incoherent, polychromatic light in a broad spectrum
US5843374A (en) * 1996-10-11 1998-12-01 Tetra Laval Holdings & Finance, Sa Method and apparatus for sterilizing packaging

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20015853U1 (de) * 2000-09-13 2001-10-18 Gesslauer Rudolf Vorrichtung zur Reinigung und Desinfektion von mit Lebensmitteln in Kontakt kommenden Flächen
US6517776B1 (en) 2000-11-03 2003-02-11 Chevron Phillips Chemical Company Lp UV oxygen scavenging initiation in angular preformed packaging articles
US6818150B2 (en) 2000-12-22 2004-11-16 Chevron Phillips Chemical Company Lp UV- or heat-triggered low oxygen packaging system employing an oxidizable polymer resin and a peroxide
US7468144B2 (en) 2000-12-22 2008-12-23 Cryovac, Inc. UV- or heat triggered low oxygen packaging system employing an oxidizable polymer resin and a peroxide
EP1633405A4 (fr) * 2003-02-28 2009-07-29 Advanced Light Technologies Ll Desinfection, destruction de croissance neoplasique, et sterilisation par absorption differentielle d'energie electromagnetique
EP1633405A2 (fr) * 2003-02-28 2006-03-15 Advanced Light Technologies LLC Desinfection, destruction de croissance neoplasique, et sterilisation par absorption differentielle d'energie electromagnetique
US8790381B2 (en) 2003-02-28 2014-07-29 Photometics, Inc. Disinfection, destruction of neoplastic growth, and sterilization by differential absorption of electromagnetic energy
US7504045B2 (en) 2005-06-07 2009-03-17 Cryovac, Inc. Method of triggering a film containing an oxygen scavenger
EP1918208A1 (fr) * 2006-10-30 2008-05-07 Heraeus Noblelight GmbH Installation de désinfection de matériaux d'emballage
DE102006051738B4 (de) * 2006-10-30 2012-12-20 Heraeus Noblelight Gmbh Packstoff-Entkeimungsanlage
DE102006051738A1 (de) * 2006-10-30 2008-05-08 Heraeus Noblelight Gmbh Packstoff-Entkeimungsanlage
CN103303529A (zh) * 2013-07-08 2013-09-18 中国农业科学院农产品加工研究所 一种食品包装盒杀菌装置
CN103303529B (zh) * 2013-07-08 2016-03-16 中国农业科学院农产品加工研究所 一种食品包装盒杀菌装置
US10959441B2 (en) 2018-04-18 2021-03-30 Xenon Corporation Ultraviolet treatment of food products to kill microorganisms while retaining fruit bloom
US11751581B2 (en) 2018-04-18 2023-09-12 Xenon Corporation Ultraviolet treatment of food products to kill microorganisms while retaining fruit bloom
CN109264104A (zh) * 2018-09-18 2019-01-25 徐鹏 环保有机食品包装设备
US11174107B2 (en) 2019-03-22 2021-11-16 Xenon Corporation Flash lamp system for disinfecting conveyors

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JP2000203535A (ja) 2000-07-25
EP1020363A3 (fr) 2002-10-16

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