JP6312973B2 - Washing method - Google Patents
Washing method Download PDFInfo
- Publication number
- JP6312973B2 JP6312973B2 JP2011146050A JP2011146050A JP6312973B2 JP 6312973 B2 JP6312973 B2 JP 6312973B2 JP 2011146050 A JP2011146050 A JP 2011146050A JP 2011146050 A JP2011146050 A JP 2011146050A JP 6312973 B2 JP6312973 B2 JP 6312973B2
- Authority
- JP
- Japan
- Prior art keywords
- washing
- peracetic acid
- group
- mass
- water
- 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.)
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- 238000005406 washing Methods 0.000 title claims description 254
- 238000000034 method Methods 0.000 title claims description 74
- KFSLWBXXFJQRDL-UHFFFAOYSA-N Peracetic acid Chemical compound CC(=O)OO KFSLWBXXFJQRDL-UHFFFAOYSA-N 0.000 claims description 256
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 97
- 239000003599 detergent Substances 0.000 claims description 75
- 238000002360 preparation method Methods 0.000 claims description 61
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 42
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 38
- 125000004432 carbon atom Chemical group C* 0.000 claims description 32
- 239000004094 surface-active agent Substances 0.000 claims description 22
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 16
- 239000002736 nonionic surfactant Substances 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000002280 amphoteric surfactant Substances 0.000 claims description 6
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- -1 builders Substances 0.000 description 59
- 230000001954 sterilising effect Effects 0.000 description 31
- 241000894006 Bacteria Species 0.000 description 21
- 235000019645 odor Nutrition 0.000 description 21
- 241000193755 Bacillus cereus Species 0.000 description 20
- 230000007935 neutral effect Effects 0.000 description 18
- 239000000203 mixture Substances 0.000 description 17
- 230000000844 anti-bacterial effect Effects 0.000 description 16
- 238000004659 sterilization and disinfection Methods 0.000 description 15
- 239000008399 tap water Substances 0.000 description 15
- 235000020679 tap water Nutrition 0.000 description 15
- 238000009472 formulation Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- 125000000217 alkyl group Chemical group 0.000 description 10
- 238000003860 storage Methods 0.000 description 10
- 239000002699 waste material Substances 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 239000002609 medium Substances 0.000 description 7
- 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 5
- 230000000694 effects Effects 0.000 description 5
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 125000002704 decyl 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])* 0.000 description 4
- 239000000645 desinfectant Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 125000001400 nonyl group Chemical group [H]C([*])([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])[H] 0.000 description 4
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000000913 palmityl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 125000002948 undecyl group Chemical group [H]C([*])([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])[H] 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000003945 anionic surfactant Substances 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
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- 238000000354 decomposition reaction Methods 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 150000004967 organic peroxy acids Chemical class 0.000 description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 125000004079 stearyl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 241000295644 Staphylococcaceae Species 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000003899 bactericide agent Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 125000000392 cycloalkenyl group Chemical group 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- 125000003493 decenyl group Chemical group [H]C([*])=C([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])[H] 0.000 description 2
- 229940079920 digestives acid preparations Drugs 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 2
- 125000005066 dodecenyl group Chemical group C(=CCCCCCCCCCC)* 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004453 electron probe microanalysis Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 125000001421 myristyl group Chemical group [H]C([*])([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])C([H])([H])[H] 0.000 description 2
- KJPHTXTWFHVJIG-UHFFFAOYSA-N n-ethyl-2-[(6-methoxypyridin-3-yl)-(2-methylphenyl)sulfonylamino]-n-(pyridin-3-ylmethyl)acetamide Chemical compound C=1C=C(OC)N=CC=1N(S(=O)(=O)C=1C(=CC=CC=1)C)CC(=O)N(CC)CC1=CC=CN=C1 KJPHTXTWFHVJIG-UHFFFAOYSA-N 0.000 description 2
- 125000005187 nonenyl group Chemical group C(=CCCCCCCC)* 0.000 description 2
- 125000004365 octenyl group Chemical group C(=CCCCCCC)* 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003206 sterilizing agent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 2
- 125000002889 tridecyl group Chemical group [H]C([*])([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])[H] 0.000 description 2
- 125000005065 undecenyl group Chemical group C(=CCCCCCCCCC)* 0.000 description 2
- 125000005023 xylyl group Chemical group 0.000 description 2
- RMSGQZDGSZOJMU-UHFFFAOYSA-N 1-butyl-2-phenylbenzene Chemical group CCCCC1=CC=CC=C1C1=CC=CC=C1 RMSGQZDGSZOJMU-UHFFFAOYSA-N 0.000 description 1
- 125000004806 1-methylethylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 125000004807 2-methylethylene group Chemical group [H]C([H])([H])C([H])([*:2])C([H])([H])[*:1] 0.000 description 1
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 241001660259 Cereus <cactus> Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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 description 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical group CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical group CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 1
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- 239000004115 Sodium Silicate Substances 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical group CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical class OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
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- 125000001204 arachidyl group Chemical group [H]C([*])([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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 235000019832 sodium triphosphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 125000005425 toluyl group Chemical group 0.000 description 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 description 1
- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Detail Structures Of Washing Machines And Dryers (AREA)
- Detergent Compositions (AREA)
Description
本発明は、洗濯方法に関し、更に詳しくは、アルカリ洗剤と過酢酸製剤とを使用する被洗物の洗濯方法に関する。 The present invention relates to a washing method, and more particularly to a washing method for an object to be washed using an alkaline detergent and a peracetic acid preparation.
従来、リネンサプライ業及びクリーニング業における業務用洗濯機としては、予洗、本洗及び濯ぎ用の浴槽を複数並設してなり、被洗物を、これら各浴槽間を移動させながら連続して洗濯を行う連続多槽式洗濯機が知られている（特許文献１）。従来、このような連続多槽式洗濯機を使用して、洗濯及び殺菌をする方法として、過酢酸を殺菌剤として使用して、リネン類などを洗濯及び殺菌する方法が知られている。該方法においては、以下の各要件を具備することが要求されている。即ち、
（１）強い汚れと共に、セレウス菌（バチルス・セレウス）などの耐性菌が付着した被洗物に対して、十分に高い殺菌性能を有すること、
（２）殺菌製剤が、発ガン性、皮膚刺激性などの危険性を伴わないこと、
（３）大量の洗剤、殺菌製剤を使用する連続多槽式洗濯機の作業において、過酢酸から発生する臭気が低く、作業環境が良好であること、
（４）殺菌製剤が危険物などに該当せず、その輸送及び貯蔵が容易かつ安全であり、それに伴うランニングコストが低いこと、
（５）洗濯殺菌後の過酢酸を含む廃液処理が容易であり、環境汚染の危険性が低いこと、
（６）上記の条件を満たしつつ、殺菌製剤の種類を変えずに、本洗浴中への添加量を変えることにより、汚れが少ないものから、汚れが強く固着したものまで幅広い被洗物を処理できること
である。
Conventionally, as washing machines for commercial use in the linen supply industry and cleaning industry, a plurality of pre-washing, main-washing, and rinsing bathtubs are arranged side by side, and the laundry is continuously washed while moving between these bathtubs. There is known a continuous multi-tank washing machine that performs (Patent Document 1). Conventionally, as a method for washing and sterilizing using such a continuous multi-tank washing machine, a method for washing and sterilizing linen and the like using peracetic acid as a sterilizing agent is known. The method is required to have the following requirements. That is,
(1) To have a sufficiently high sterilization performance against an object to be washed to which resistant bacteria such as Bacillus cereus are attached together with strong dirt,
(2) The disinfectant preparation is not accompanied by dangers such as carcinogenicity and skin irritation,
(3) In the operation of a continuous multi-tank washing machine using a large amount of detergent and sterilizing preparation, the odor generated from peracetic acid is low and the working environment is good.
(4) The bactericidal preparation is not a dangerous substance, its transportation and storage are easy and safe, and the associated running cost is low,
(5) Easy disposal of waste liquid containing peracetic acid after washing and sterilization, and low risk of environmental pollution,
(6) By changing the amount added to the main washing bath without changing the type of sterilizing preparation while satisfying the above conditions, a wide range of items to be washed can be processed, from those with little dirt to those with strong dirt. It can be done.
従来、過酢酸をリネン類などの殺菌に使用する方法は、例えば、特許文献２及び３に知られている。例えば、特許文献２には、業務用の衛生洗濯において、リネン類のアルカリ洗浄後に、過酢酸等の有機過酸を用いて、サワー効果付与と殺菌を同時に行う洗濯方法が開示されている。この方法は、アルカリ洗浄後の汚れを除去した被洗物を、その後の、いわゆる濯ぎの段階で殺菌する方法である。また、該方法は、耐熱性の弱い黄色ブドウ球菌を殺菌対象とするものであり、耐熱性菌を対象とするものではない。特許文献２は、耐熱性菌に対する殺菌効果を開示していない。 Conventionally, methods of using peracetic acid for sterilization of linens and the like are known, for example, in Patent Documents 2 and 3. For example, Patent Document 2 discloses a laundry method in which a sour effect is imparted and sterilized at the same time using an organic peracid such as peracetic acid after washing the linen with an alkali in commercial hygiene laundry. This method is a method of sterilizing an article to be washed from which dirt has been removed after alkaline washing in a so-called rinsing stage. Moreover, this method is intended for sterilization of Staphylococcus aureus having low heat resistance, and is not intended for heat-resistant bacteria. Patent Document 2 does not disclose a bactericidal effect against heat-resistant bacteria.
特許文献３には、リネンサプライ業及びクリーニング業において、アルカリ洗剤と、過酢酸製剤を洗濯機に投入し、セレウス菌などの耐熱性菌が付着したタオルなどを洗濯殺菌する方法が開示されている。この方法は、ホテルのシーツ等の軽度な汚れの殺菌には有効ではあるものの、病院などから搬出される強い汚れの被洗物の殺菌に対しては、不十分であるというケースが頻発する問題があった。また、十分な殺菌力を得るために、洗濯及び殺菌時間を長くすることも考えられるが、生産性が低下して、コストアップにつながる。 Patent Document 3 discloses a method in which an alkaline detergent and a peracetic acid preparation are introduced into a washing machine in a linen supply industry and a cleaning industry, and a towel to which heat-resistant bacteria such as Bacillus cereus are attached is washed and sterilized. . Although this method is effective for sterilization of light dirt such as hotel sheets, it is frequently insufficient for sterilization of strongly soiled objects carried out from hospitals. was there. In order to obtain a sufficient sterilizing power, it may be possible to lengthen the washing and sterilizing time, but the productivity is lowered and the cost is increased.
病院などから搬出される被洗物のように、強い汚れの付着した被洗物の殺菌には、過酢酸製剤の投入量を増やして、本洗浴中の過酢酸濃度を高める方法が考えられる。しかし、過酢酸及び酢酸の臭気により、洗濯機周辺の作業環境が低下する。また、洗濯後の廃液処理のために使用する活性汚泥中の微生物は、過酢酸のような殺菌剤により、死滅し易い。故に、過酢酸製剤投入量を増加する方法も、かかる観点からの制約が大きい。従って、作業環境及び廃液処理の問題を起こさずに、軽度な汚れの被洗物から、血液が固着したような強度の汚れ被洗物まで、幅広い被洗物に対して、確実に殺菌できる方法が求められている。しかし、従来の方法では、上記のような実用上の総合的な要求を満足できる洗濯殺菌方法が得られていないのが現状である。 In order to sterilize an object to be washed, such as an object to be washed out from a hospital or the like, a method of increasing the peracetic acid concentration in the main washing bath by increasing the input amount of the peracetic acid preparation can be considered. However, the working environment around the washing machine is lowered due to the odor of peracetic acid and acetic acid. Moreover, microorganisms in activated sludge used for waste liquid treatment after washing are easily killed by a disinfectant such as peracetic acid. Therefore, the method of increasing the peracetic acid formulation input amount is also very limited from this viewpoint. Therefore, a method that can surely sterilize a wide range of items to be washed, from mildly soiled objects to highly contaminated soiled objects to which blood has adhered, without causing problems in the working environment and waste liquid treatment. Is required. However, the conventional method does not provide a laundry sterilization method that can satisfy the above-mentioned comprehensive practical requirements.
また、特許文献１の実施例に記載された方法では、使用する過酢酸製剤中の過酸化水素濃度が１１重量％、過酢酸濃度が１５重量％と高く、輸送及び貯蔵時に爆発の危険性があり、それ故、消防法上の規制対象となっていた。特許文献２の実施例に記載された方法では、過酢酸濃度は４．５重量％と低いものの、過酸化水素が１６重量％と高く、やはり消防法上の危険物に相当しており、それ故、取扱が煩雑でコストアップの大きな要因となっていた。 Moreover, in the method described in the Example of patent document 1, the hydrogen peroxide density | concentration in the peracetic acid formulation to be used is 11 weight% and the peracetic acid density | concentration is as high as 15 weight%, and there exists a danger of an explosion at the time of transportation and storage. Therefore, it was subject to regulation under the Fire Service Law. In the method described in the example of Patent Document 2, although the concentration of peracetic acid is as low as 4.5% by weight, hydrogen peroxide is as high as 16% by weight, which is also equivalent to a dangerous substance under the Fire Service Act. Therefore, handling was complicated and it was a big factor of cost increase.
本発明は、安全性が高く、かつ、貯蔵安定性の優れた過酢酸製剤を使用して、被洗物に付着した耐熱性菌を、高い信頼性で洗濯殺菌できるのみならず、洗濯中の作業環境を損なわず、かつ、廃液処理が容易な洗濯方法を提供するものである。 The present invention is not only capable of washing and sterilizing the heat-resistant bacteria attached to the washing object with high reliability by using a peracetic acid preparation having high safety and excellent storage stability. It is an object of the present invention to provide a washing method that does not impair the working environment and that can be easily treated with waste liquid.
従来、特許文献２に記載されているように、ブドウ球菌のような耐熱性の弱い菌に対しては、アルカリ性洗剤で洗濯した後に、いわゆる濯ぎの段階で殺菌するという方法が知られていた。しかし、特許文献２には、該方法がブドウ球菌のような耐熱性の弱い菌に対して有効であることは記載されているものの、セレウス菌のような耐熱性菌に対する使用については何ら開示されていない。セレウス菌のような耐熱性菌に対しては、特許文献３に記載されているように、有機過酸と共にアルカリ性洗剤又は中性洗剤を用いて、洗濯及び殺菌を同時に行う方法が知られている。しかし、このような方法では、強い汚れの被洗物に対して十分な殺菌ができないことが度々あった。また、上記いずれの方法においても、例えば、耐熱性菌に対する殺菌効果を高めるために有機過酸の濃度を高くしたのでは、廃液処理、危険性の問題等、種々の問題が生ずる。そこで、本発明者らは、特許文献３記載の方法では、何故、十分な殺菌ができないのかについて、種々検討した。その結果、これは、汚れが付着した被洗物を、アルカリ洗剤を使用した本洗浴中で洗濯及び殺菌する際に、殺菌剤が汚れやアルカリ洗剤と反応して分解され、殺菌力が徐々に低下すること、及び、付着した汚れが殺菌剤の拡散及び浸透を妨げるという、二つの原因によるものではないかという知見を得た。そこで、本発明者らは、このような知見に基づいて更に検討したところ、アルカリ洗濯槽中で過酢酸により洗濯殺菌をするに際して、被洗物の予洗を実施し、かつ、該予洗後、アルカリ洗剤による本洗を実施する前の段階で、予洗に使用した水の抜き取り（ドレイン抜き）を行い、かつ、アルカリ本洗濯浴中の過酢酸濃度を、下記所定の比較的低い濃度範囲にすることにより、作業環境及び廃液処理に大きな負担をかけることなく、強固な汚れが付着した被洗物でも、短時間で確実に洗濯及び殺菌できることを見出した。また、洗濯槽に投入する過酢酸製剤を、好ましくは、下記所定の組成にすることにより、更に好ましくは、下記所定の界面活性剤を併用することにより、殺菌力を著しく向上させ得ることを見出した。 Conventionally, as described in Patent Document 2, a method of sterilizing bacteria with low heat resistance such as staphylococci at the so-called rinsing stage after washing with an alkaline detergent has been known. However, although Patent Document 2 describes that the method is effective against bacteria with low heat resistance such as staphylococci, there is no disclosure about use against heat resistant bacteria such as Bacillus cereus. Not. For heat-resistant bacteria such as Bacillus cereus, a method is known in which washing and sterilization are simultaneously performed using an alkaline detergent or neutral detergent together with an organic peracid, as described in Patent Document 3. . However, such a method often fails to sufficiently sterilize strongly soiled objects. In any of the above methods, for example, if the concentration of the organic peracid is increased in order to enhance the bactericidal effect against heat-resistant bacteria, various problems such as waste liquid treatment and risk problems arise. Therefore, the present inventors have studied variously why the method described in Patent Document 3 cannot be sufficiently sterilized. As a result, when washing and sterilizing the object to be washed with dirt in a main washing bath using an alkaline detergent, the sterilizing agent reacts with the dirt and the alkaline detergent and decomposes, and the sterilizing power gradually increases. It has been found that the decrease is due to two causes, that is, the adhered dirt prevents diffusion and penetration of the bactericide. Therefore, the present inventors further studied based on such knowledge, and when washing and sterilizing with peracetic acid in an alkaline washing tub, the present invention was prewashed, and after the prewash, Before performing the main washing with the detergent, drain the water used for pre-washing, and set the peracetic acid concentration in the alkaline main washing bath to the following relatively low concentration range. Thus, it has been found that even an object to be washed, to which strong dirt adheres, can be reliably washed and sterilized in a short time without imposing a heavy burden on the working environment and waste liquid treatment. Further, it has been found that the peracetic acid preparation to be put into the washing tub is preferably made to have the following predetermined composition, and more preferably, the combined use of the following predetermined surfactant can significantly improve sterilizing power. It was.
即ち、本発明は、
（１）アルカリ洗剤と過酢酸製剤とを使用する被洗物の洗濯方法において、被洗物を予洗し、該予洗に使用した水を抜き取り、次いで、アルカリ洗剤と過酢酸製剤とを含む水であって、該水中の過酢酸濃度が１０〜５００質量ｐｐｍである水により、上記の予洗した被洗物を、更に本洗することを特徴とする洗濯方法である。
That is, the present invention
(1) In a washing method for an object to be washed using an alkaline detergent and a peracetic acid preparation, the article to be washed is prewashed, the water used for the prewash is drained, and then the water containing the alkaline detergent and the peracetic acid preparation is used. In the washing method, the prewashed article is further washed with water having a peracetic acid concentration in the water of 10 to 500 ppm by mass.
好ましい態様として、
（２）上記の予洗に使用した水の抜き取りの後であって、かつ、上記本洗の前に、被洗物を濯ぎ、次いで、該濯ぎに使用した水を抜き取る操作を実施する、上記（１）記載の方法、
（３）上記の濯ぎ、続く水抜きの操作が、１〜３回実施される、上記（２）記載の方法、
（４）上記の濯ぎ、続く水抜きの操作が、２〜３回実施される、上記（２）記載の方法、
（５）上記被洗物の予洗が、アルカリ洗剤を含む水により実施される、上記（１）〜（４）のいずれか一つに記載の洗濯方法、
（６）上記被洗物の予洗が、中性洗剤を含む水により実施される、上記（１）〜（５）のいずれか一つに記載の洗濯方法、
（７）上記過酢酸製剤が、過酢酸１．０〜６．０質量％、過酸化水素１．０〜６．０質量％、酢酸２０〜４０質量％、及び、水の合計１００質量％から成る、上記（１）〜（６）のいずれか一つに記載の洗濯方法、
（８）上記過酢酸製剤が、過酢酸１．５〜２．５質量％、過酸化水素４．０〜６．０質量％、酢酸２５〜３０質量％、及び、水の合計１００質量％から成る、上記（１）〜（６）のいずれか一つに記載の洗濯方法、
（９）上記水中の過酢酸濃度が、１００〜３００質量ｐｐｍである、上記（１）〜（８）のいずれか一つに記載の洗濯方法、
（１０）上記本洗に使用する水が、下記式（１）で示される両性界面活性剤
を更に含む、上記（１）〜（９）のいずれか一つに記載の洗濯方法、
（１１）上記本洗に使用する水が、下記式（２）で示されるノニオン界面活性剤
を更に含む、上記（１）〜（１０）のいずれか一つに記載の洗濯方法、
（１２）上記界面活性剤が、過酢酸製剤中に０．１〜１０質量％含まれるものである、上記（１０）又は（１１）記載の洗濯方法、
（１３）自動式洗濯機が使用される、上記（１）〜（１２）のいずれか一つに記載の洗濯方法、
（１４）上記自動式洗濯機が、少なくとも予洗槽、本洗槽及び濯ぎ槽を備え、被洗物を、上記各槽の順序に移動させながら洗濯を行う連続多槽式洗濯機である、上記（１３）記載の洗濯方法、
（１５）上記過酢酸製剤が本洗槽に投入される、上記（１４）記載の洗濯方法、
（１６）アルカリ洗剤が、更に本洗槽に投入される、上記（１４）又は（１５）記載の洗濯方法、
（１７）上記過酢酸製剤の投入量が調節される、上記（１５）又は（１６）記載の洗濯方法、
を挙げることができる。
As a preferred embodiment,
(2) The operation of rinsing the article to be washed after the water used for the pre-washing and before the main washing is carried out, and then the water used for the rinsing is drained. 1) The method described
(3) The method according to (2) above, wherein the rinsing and subsequent draining operations are carried out 1 to 3 times.
(4) The method according to (2) above, wherein the rinsing and subsequent draining operations are carried out 2-3 times.
(5) The washing method according to any one of (1) to (4), wherein the pre-washing of the article to be washed is performed with water containing an alkaline detergent.
(6) The washing method according to any one of (1) to (5), wherein the pre-washing of the article to be washed is performed with water containing a neutral detergent.
(7) The peracetic acid preparation is composed of 1.0 to 6.0% by mass of peracetic acid, 1.0 to 6.0% by mass of hydrogen peroxide, 20 to 40% by mass of acetic acid, and a total of 100% by mass of water. The washing method according to any one of (1) to (6),
(8) The above-mentioned peracetic acid preparation is 1.5 to 2.5% by mass of peracetic acid, 4.0 to 6.0% by mass of hydrogen peroxide, 25 to 30% by mass of acetic acid, and a total of 100% by mass of water. The washing method according to any one of (1) to (6),
(9) The washing method according to any one of (1) to (8), wherein the peracetic acid concentration in the water is 100 to 300 ppm by mass,
(10) The water used for the main washing is an amphoteric surfactant represented by the following formula (1).
The washing method according to any one of (1) to (9), further comprising:
(11) The water used for the main washing is a nonionic surfactant represented by the following formula (2).
The washing method according to any one of (1) to (10), further comprising:
(12) The washing method according to (10) or (11), wherein the surfactant is contained in the peracetic acid preparation in an amount of 0.1 to 10% by mass,
(13) The washing method according to any one of (1) to (12), wherein an automatic washing machine is used,
(14) The automatic washing machine is a continuous multi-tank washing machine that includes at least a pre-washing tank, a main washing tank, and a rinsing tank, and performs washing while moving an object to be washed in the order of the tanks. (13) The washing method according to
(15) The washing method according to (14), wherein the peracetic acid preparation is put into a main washing tank,
(16) The washing method according to the above (14) or (15), wherein an alkaline detergent is further added to the main washing tank,
(17) The washing method according to (15) or (16), wherein the input amount of the peracetic acid preparation is adjusted,
Can be mentioned.
本発明の洗濯方法によれば、本洗に先立って、被洗物を予洗し、次いで、該予洗に使用した水を抜き取る故、本洗中の過酢酸の分解及び消費を小さくすることができる。従って、実用的な処理速度、及び、低い過酢酸濃度で、信頼性の高い洗濯及び殺菌ができる。また、低い過酢酸濃度の殺菌剤を使用することから、安全性が高く、かつ、貯蔵安定性に優れ、加えて、洗濯中の臭気等による作業環境を損なわず、かつ、廃液処理が容易となる。加えて、予洗を採用することにより、本洗中の比較的低い過酢酸濃度であっても、強い汚れの被洗物及び弱い汚れの被洗物の殺菌及び洗浄に対応できる。従って、過酢酸濃度を適宜コントロールすることにより、一台の洗濯機で、幅広い被洗物の処理が可能である。 According to the washing method of the present invention, the object to be washed is pre-washed prior to the main washing, and then the water used for the pre-washing is withdrawn, so that the decomposition and consumption of peracetic acid during the main washing can be reduced. . Therefore, reliable washing and sterilization can be performed at a practical processing speed and a low peracetic acid concentration. In addition, because it uses a low peracetic acid concentration bactericidal agent, it is highly safe and has excellent storage stability. In addition, it does not impair the working environment due to odors during washing, and waste liquid treatment is easy. Become. In addition, by adopting pre-washing, even if the peracetic acid concentration is relatively low during the main washing, it is possible to deal with sterilization and washing of washed objects with strong dirt and washed objects with weak dirt. Accordingly, by controlling the peracetic acid concentration as appropriate, a wide range of objects to be washed can be processed with a single washing machine.
本発明のアルカリ洗剤と過酢酸製剤とを使用する被洗物の洗濯方法は、被洗物を予洗し、該予洗に使用した水を抜き取り、次いで、アルカリ洗剤と過酢酸製剤とを含む水であって、該水中の過酢酸濃度が１０〜５００質量ｐｐｍである水により、上記の予洗した被洗物を、更に本洗することを特徴とする。本発明の方法においては、まず、被洗物を予洗し、該予洗に使用した水を抜き取る。ここで、水の抜き取り（ドレイン抜き）とは、予洗において生じた汚れた水を排出すること、例えば、好ましく使用される自動式洗濯機においては、予洗において予洗槽から被洗物と一緒に移動してきた汚れた水を洗濯機外に排出することを言う。かかる水の抜き取りにより、予洗により取り除かれた汚れ及び細菌等をドレインへ排出することができ、本洗中に過酢酸が、これらの汚れ及び細菌等により分解及び消費されることを低減することができる。ここで、予洗に使用する水としては、水道水を使用することができる。好ましくは、本発明の方法における本洗後の濯ぎ工程から排出される水をリサイクル使用する。 The washing method of the washing object using the alkaline detergent and the peracetic acid preparation of the present invention prewashes the washing object, drains the water used for the prewashing, and then uses water containing the alkaline detergent and the peracetic acid preparation. Then, the prewashed article is further washed with water having a peracetic acid concentration of 10 to 500 ppm by mass in the water. In the method of the present invention, first, the article to be washed is prewashed, and the water used for the prewash is extracted. Here, the draining of water (drain draining) means discharging dirty water generated in the pre-washing, for example, in an automatic washing machine that is preferably used, moving together with the article to be washed in the pre-washing It means that the dirty water that has been discharged is discharged out of the washing machine. By removing the water, dirt and bacteria removed by pre-washing can be discharged to the drain, and peracetic acid can be reduced from being decomposed and consumed by these dirt and bacteria during the main washing. it can. Here, tap water can be used as water used for prewashing. Preferably, the water discharged from the rinsing step after the main washing in the method of the present invention is recycled.
上記の予洗は、好ましくは、アルカリ洗剤、中性洗剤等の洗剤を含む水により実施することができる。ここで、アルカリ洗剤の濃度は、好ましくは０．０５〜１０質量％、より好ましくは０．２〜５質量％であり、中性洗剤の濃度は、好ましくは０．０１〜１質量％、より好ましくは０．０３〜０．３質量％である。これらの洗剤のｐＨは、濃度０．１質量％の水溶液において、好ましくは７．０以上である。このようなアルカリ洗剤又は中性洗剤は、特に限定されるものではなく、慣用の洗濯用洗剤を使用することができる。また、必要に応じて、例えば、界面活性剤、ビルダー、及びその他の添加剤、例えば、再汚染防止剤、酵素、消泡剤、蛍光増白剤、抗菌剤などを含むことができる。 The pre-washing can be preferably performed with water containing a detergent such as an alkaline detergent or a neutral detergent. Here, the concentration of the alkaline detergent is preferably 0.05 to 10% by mass, more preferably 0.2 to 5% by mass, and the concentration of the neutral detergent is preferably 0.01 to 1% by mass, more Preferably it is 0.03-0.3 mass%. The pH of these detergents is preferably 7.0 or higher in an aqueous solution having a concentration of 0.1% by mass. Such alkaline detergent or neutral detergent is not particularly limited, and a conventional laundry detergent can be used. If necessary, for example, surfactants, builders, and other additives such as anti-staining agents, enzymes, antifoaming agents, fluorescent whitening agents, antibacterial agents and the like can be included.
上記の洗剤に含める界面活性剤としては、アニオン界面活性剤及び／又はノニオン界面活性剤を用いることができる。アニオン界面活性剤としては、例えば、（１）炭素数１０〜２０の脂肪酸のアルカリ金属塩（例えば、ナトリウム塩及びカリウム塩）、モノエタノールアミン塩、トリエタノールアミン塩等のセッケン；（２）炭素数１０〜２０のα―スルホ脂肪酸エステルナトリウム等のα―スルホ脂肪酸エステル；（３）炭素数１０〜１４のアルキルを有するアルキルベンゼンスルホン酸ナトリウム等のアルキルベンゼンスルホン酸塩；（４）ドデシル硫酸ナトリウム等の炭素数１０〜２０の高級アルコール硫酸エステル塩などが挙げられる。また、ノニオン界面活性剤としては、例えば、（１）アルキル基の炭素数が６〜１４であるポリオキシエチレンアルキルエーテル；（２）アルキル基の炭素数が６〜１８であるポリオキシエチレンアルキルフェノールエーテルなどが挙げられる。 As the surfactant included in the detergent, an anionic surfactant and / or a nonionic surfactant can be used. Examples of the anionic surfactant include (1) soaps such as alkali metal salts (for example, sodium salts and potassium salts) of fatty acids having 10 to 20 carbon atoms, monoethanolamine salts, triethanolamine salts; (2) carbon Α-sulfo fatty acid esters such as sodium α-sulfo fatty acid esters of several 10 to 20; (3) alkyl benzene sulfonates such as sodium alkyl benzene sulfonate having alkyl having 10 to 14 carbon atoms; (4) sodium dodecyl sulfate, etc. Examples thereof include higher alcohol sulfates having 10 to 20 carbon atoms. Examples of the nonionic surfactant include (1) polyoxyethylene alkyl ether having an alkyl group having 6 to 14 carbon atoms; (2) polyoxyethylene alkylphenol ether having an alkyl group having 6 to 18 carbon atoms. Etc.
上記の洗剤に含めるビルダーは、洗剤のｐＨを調整するために使用される。該ビルダーとしては、アルカリビルダーが好ましい。該アルカリビルダーとしては、例えば、水酸化ナトリウム、水酸化カリウム等のアルカリ金属水酸化物、炭酸ナトリウム等のアルカリ金属炭酸塩、ケイ酸ナトリウム等のアルカリ金属ケイ酸塩などが挙げられる。また、その他のビルダーとして、例えば、トリポリリン酸塩、ピロリン酸塩等の無機系リン酸塩、炭酸水素塩などを用いることもできる。 Builders included in the above detergent are used to adjust the pH of the detergent. As the builder, an alkali builder is preferable. Examples of the alkali builder include alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, alkali metal carbonates such as sodium carbonate, and alkali metal silicates such as sodium silicate. In addition, as other builders, for example, inorganic phosphates such as tripolyphosphate and pyrophosphate, hydrogen carbonate, and the like can be used.
本発明の方法においては、上記の予洗に使用した水の抜き取りの後であって、かつ、上記本洗の前に、被洗物を濯ぎ、次いで、該濯ぎに使用した水を抜き取る操作を実施することが好ましい。即ち、予洗に使用した水の抜き取りをした後、予洗が終了した段階での濯ぎを行うことが好ましい。該濯ぎに際しては、被洗物を搖動して濯ぎの効果を上げることもできる。予洗が終了した段階での濯ぎにより、更に、汚れ及び菌類が除去されるため、後に実施される本洗での殺菌をより効果的にすることができる。従って、多量の被服物について、低濃度の過酢酸により、より良好に殺菌することができる。特に、病院における被洗物のように、血液の汚れ等が強い被洗物を良好に殺菌することができる。該濯ぎに使用する水の量は、予洗に使用した水の質量に対して、好ましくは１００質量％以下、より好ましくは２０〜５０質量％である。また、予洗が終了した段階での濯ぎは、好ましくは１〜３回、より好ましくは２〜３回、更に好ましくは２回である。上記上限を超えると、予洗後の濯ぎに時間を要しすぎて、本発明の方法全体の処理速度が低下する。また、上記下限未満では、強固な汚れに対しては、後の本洗において過酢酸濃度を高めなければならないことがある。 In the method of the present invention, after the water used for the pre-washing is extracted and before the main washing, an operation of rinsing the article to be washed and then draining the water used for the rinsing is performed. It is preferable to do. That is, it is preferable to perform rinsing at the stage where pre-washing is completed after draining water used for pre-washing. In the rinsing, the washing object can be swung to increase the rinsing effect. Since the dirt and fungi are further removed by rinsing at the stage where the pre-washing is completed, sterilization in the main washing performed later can be made more effective. Therefore, a large amount of clothing can be sterilized better with a low concentration of peracetic acid. In particular, it is possible to satisfactorily sterilize an object to be cleaned that has a strong blood stain, such as an object to be cleaned in a hospital. The amount of water used for the rinsing is preferably 100% by mass or less, more preferably 20 to 50% by mass with respect to the mass of water used for prewashing. Further, the rinsing at the stage where the pre-washing is completed is preferably 1 to 3 times, more preferably 2 to 3 times, and even more preferably 2 times. When the above upper limit is exceeded, it takes too much time for rinsing after pre-washing, and the processing speed of the entire method of the present invention is reduced. On the other hand, if it is less than the lower limit, it may be necessary to increase the concentration of peracetic acid in the subsequent main washing for strong dirt.
上記の予洗は、好ましくは、自動式洗濯機の予洗槽において実施され、水の抜き取り及び任意的に実施される予洗が終了した段階での濯ぎは、好ましくは、自動式洗濯機の予洗槽で予洗が完了した後に順次実施される。あるいは、自動式洗濯機の予洗槽の後に水抜き専用の槽（水抜き槽）を設けて、該槽から予洗後の水を抜き出し、また、予洗が終了した段階での濯ぎを実施する際には、該槽に、水、例えば、水道水等を供給して濯ぎを行い、該槽から水を抜出すこともできる。もちろん、バッチ式洗濯機を使用した場合には、予洗及び水抜き、並びに、任意的に実施される予洗が終了した段階での濯ぎ及びその水抜きは、全て同一の単一槽で実施される。 The above pre-washing is preferably carried out in a pre-washing tank of an automatic washing machine, and the rinsing at the stage where draining of water and optional pre-washing is completed is preferably carried out in the pre-washing tank of the automatic washing machine. It is carried out sequentially after the pre-washing is completed. Alternatively, when a tank dedicated for draining (water draining tank) is provided after the pre-washing tank of the automatic washing machine, water after pre-washing is extracted from the tank, and rinsing is performed when pre-washing is completed. Can be supplied with water, for example, tap water, and rinsed, and water can be extracted from the tank. Of course, when a batch-type washing machine is used, pre-washing and draining, as well as rinsing and draining at the stage where the optional pre-washing is completed, are all carried out in the same single tank. .
次いで、本発明の方法においては、上記の予洗した被洗物が、アルカリ洗剤と過酢酸製剤とを含む水により本洗される。ここで、過酢酸製剤は、過酢酸製剤を投入する本洗槽において本洗に使用される水中の過酢酸濃度が１０〜５００質量ｐｐｍ、好ましくは１００〜３００質量ｐｐｍであるように添加される。とりわけ、軽度の汚れの被洗物、例えば、ホテルのシーツ等の本洗に際しては、好ましくは１０〜３００質量ｐｐｍとし、感染可能性が高く、重度の汚れの被洗物、例えば、病院などから搬出される被洗物等の本洗に際しては、好ましくは１００〜５００質量ｐｐｍとする。これにより、被洗物の汚れの度合いにより、従来のように洗濯機を複数所持して洗濯機を変える必要がなく、一台の洗濯機で幅広い汚れ度合の被洗物に対して対応可能である。過酢酸濃度が１０質量ｐｐｍ未満では、十分な殺菌をすることができず、また、好ましい下限である１００質量ｐｐｍ未満では、式（１）及び／又は式（２）で示される界面活性剤を添加しても、強固な汚れの被洗物を大量に処理すると、殺菌効果が不安定になることがある。一方、５００質量ｐｐｍを超えては、作業時の臭気の悪化、排水処理の困難性、及び、コスト高等の問題を生じ、また、好ましい上限である３００質量ｐｐｍを超えては、作業時に洗濯機周辺の臭気が強くなることがある。 Next, in the method of the present invention, the pre-washed article to be washed is finally washed with water containing an alkaline detergent and a peracetic acid preparation. Here, the peracetic acid preparation is added so that the concentration of peracetic acid in the water used for the main washing in the main washing tank into which the peracetic acid preparation is charged is 10 to 500 ppm by mass, preferably 100 to 300 ppm by mass. . In particular, in the case of lightly soiled items such as hotel sheets, it is preferably 10 to 300 ppm by mass, and the possibility of infection is high. In the main washing of the articles to be washed out, the amount is preferably 100 to 500 ppm by mass. As a result, there is no need to change the washing machine by having multiple washing machines as in the past, depending on the degree of dirt on the washing object, and a single washing machine can handle washing objects with a wide range of dirt levels. is there. When the concentration of peracetic acid is less than 10 mass ppm, sufficient sterilization cannot be performed, and when the concentration is less than 100 mass ppm, which is a preferable lower limit, the surfactant represented by formula (1) and / or formula (2) is not used. Even if it is added, the sterilizing effect may become unstable if a large amount of strongly soiled objects are processed. On the other hand, if it exceeds 500 ppm by mass, problems such as worsening of odor during work, difficulty in wastewater treatment, and high costs occur, and if it exceeds 300 ppm by mass, which is a preferred upper limit, The surrounding odor may become strong.
本発明で使用する過酢酸製剤は、過酢酸と、酢酸、過酸化水素及び水の平衡組成物であり、好ましくは、過酢酸１．０〜６．０質量％、過酸化水素１．０〜６．０質量％、酢酸２０〜４０質量％、及び、水の合計１００質量％から成り、より好ましくは、過酢酸１．５〜２．５質量％、過酸化水素４．０〜６．０質量％、酢酸２５〜３０質量％、及び、水の合計１００質量％から成る。ここで、過酢酸の濃度は、過酢酸製剤中、好ましくは、１．０〜６．０質量％、より好ましくは１．５〜２．５質量％である。過酢酸の濃度が１．０質量％未満では、過酢酸製剤の貯蔵安定性に欠けるばかりではなく、過酢酸製剤全体としての使用量が増加することから、過酢酸製剤の運搬及び貯蔵が煩雑となり、作業性等の低下を招く。また、より好ましい下限の１．５質量％未満では、殺菌作用が不安定になることがある。一方、過酢酸の濃度が６．０質量％を超えては、過酢酸製剤全体として危険性が増大するばかりではなく、消防法の適用を受けなければならない。また、より好ましい上限の２．５質量％を超えると、過酢酸製剤の取り扱い時の臭気が多少強くなる傾向にあり、作業性等の低下を招くことがある。また、過酢酸製剤の運搬及び貯蔵用容器がポリオレフィン系樹脂で作られていることが多いために、過酢酸などの酸化作用の影響により、これらの容器に劣化が生ずることがある。過酢酸濃度をより好ましい範囲である１．５〜２．５質量％とすることにより、過酢酸製剤の貯蔵安定性を高めることができ、かつ、臭気を著しく低減することができる。本発明で使用する過酢酸製剤中の過酸化水素の濃度は、好ましくは１．０〜６．０質量％、より好ましくは４．０〜６．０質量％である。過酸化水素の濃度が１．０質量％未満では、過酢酸の平衡濃度を安定的に得ることが困難になることがあり、一方、６．０質量％を超えては、消防法の適用対象となる。より好ましい範囲である４．０〜６．０質量％にすることにより、過酢酸製剤をより安定化することができる。過酢酸製剤中の酢酸の濃度は、好ましくは２０〜４０質量％、より好ましくは２５〜３０質量％である。上記範囲を外れると、過酢酸の平衡濃度を安定的に得ることが困難になることがある。より好ましい範囲である２５〜３０質量％にすることにより、過酢酸製剤をより安定化することができる。 The peracetic acid preparation used in the present invention is an equilibrium composition of peracetic acid, acetic acid, hydrogen peroxide and water, preferably 1.0 to 6.0% by mass of peracetic acid, 1.0 to hydrogen peroxide. It consists of 6.0% by mass, acetic acid 20-40% by mass and water total 100% by mass, more preferably 1.5-2.5% by mass peracetic acid, 4.0-6.0 hydrogen peroxide. Consists of 100% by mass of acetic acid, 25-30% by mass of acetic acid, and water. Here, the concentration of peracetic acid is preferably 1.0 to 6.0 mass%, more preferably 1.5 to 2.5 mass% in the peracetic acid preparation. If the concentration of peracetic acid is less than 1.0% by mass, not only the storage stability of the peracetic acid formulation is lacking, but the amount of peracetic acid formulation used as a whole increases, which makes the transportation and storage of the peracetic acid formulation complicated. As a result, workability and the like are reduced. Moreover, if it is less than 1.5 mass% of a more preferable minimum, a bactericidal action may become unstable. On the other hand, if the concentration of peracetic acid exceeds 6.0% by mass, not only the risk of the peracetic acid preparation as a whole increases, but also the application of the Fire Service Act must be applied. On the other hand, if it exceeds the more preferable upper limit of 2.5% by mass, the odor during handling of the peracetic acid preparation tends to be somewhat strong, and the workability and the like may be reduced. Further, since containers for transporting and storing peracetic acid preparations are often made of a polyolefin-based resin, these containers may be deteriorated due to the effect of oxidation such as peracetic acid. By setting the peracetic acid concentration to a more preferable range of 1.5 to 2.5% by mass, the storage stability of the peracetic acid preparation can be increased, and the odor can be significantly reduced. The concentration of hydrogen peroxide in the peracetic acid preparation used in the present invention is preferably 1.0 to 6.0% by mass, more preferably 4.0 to 6.0% by mass. If the concentration of hydrogen peroxide is less than 1.0% by mass, it may be difficult to stably obtain the equilibrium concentration of peracetic acid. On the other hand, if the concentration exceeds 6.0% by mass, the fire fighting law is applicable. It becomes. A peracetic acid formulation can be more stabilized by setting it as 4.0 to 6.0 mass% which is a more preferable range. The concentration of acetic acid in the peracetic acid preparation is preferably 20 to 40% by mass, more preferably 25 to 30% by mass. Outside the above range, it may be difficult to stably obtain an equilibrium concentration of peracetic acid. A peracetic acid formulation can be more stabilized by setting it as 25-30 mass% which is a more preferable range.
本発明においては、本洗中の殺菌性能を向上させるために、好ましくは、更に界面活性剤を使用することができる。界面活性剤としては、下記式（１）
及び／又は、
下記式（２）
And / or
Following formula (2)
式（１）で示される両性界面活性剤はアミンオキシドであり、式（１）中、Ｒ１〜Ｒ３は、夫々独立して、炭素数１〜３０の炭化水素基又は炭素数１〜４のアルカノール基を示す。ここで、炭素数１〜３０の炭化水素基としては、例えば、アルキル基、アルケニル基、アリール基、シクロアルキル基、シクロアルケニル基等が挙げられる。これらのうち、Ｒ１〜Ｒ３は、夫々独立して、アルキル基又は炭素数１〜４のアルカノール基を示すことが好ましい。これにより、過酢酸との優れた相乗効果が期待される。また、式（１）中、Ｒ１〜Ｒ３の少なくとも一つ、好ましくは一つが、炭素数８〜３０の炭化水素基、好ましくは炭素数８〜１８の炭化水素基、より好ましくは炭素数１０〜１６の炭化水素基である。式（１）中、Ｒ１〜Ｒ３の一つが、上記の炭化水素基であるとき、Ｒ１〜Ｒ３の他の二つは、夫々独立して、好ましくは、炭素数１〜４の炭化水素基又は炭素数１〜４のアルカノール基を示し、より好ましくは炭素数１〜２の炭化水素基又は炭素数２〜４のアルカノール基を示し、更に好ましくは、メチル基、エタノール基又はプロパノール基を示す。 The amphoteric surfactant represented by the formula (1) is an amine oxide, and in the formula (1), R 1 to R 3 are each independently a hydrocarbon group having 1 to 30 carbon atoms or a carbon number having 1 to 4 carbon atoms. An alkanol group of Here, as a C1-C30 hydrocarbon group, an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, a cycloalkenyl group etc. are mentioned, for example. Among these, it is preferable that R < 1 > -R < 3 > shows an alkyl group or a C1-C4 alkanol group each independently. Thereby, an excellent synergistic effect with peracetic acid is expected. In formula (1), at least one of R 1 to R 3 , preferably one is a hydrocarbon group having 8 to 30 carbon atoms, preferably a hydrocarbon group having 8 to 18 carbon atoms, more preferably a carbon number. 10 to 16 hydrocarbon groups. In Formula (1), when one of R 1 to R 3 is the above hydrocarbon group, the other two of R 1 to R 3 are each independently preferably, preferably having 1 to 4 carbon atoms. A hydrocarbon group or an alkanol group having 1 to 4 carbon atoms, more preferably a hydrocarbon group having 1 to 2 carbon atoms or an alkanol group having 2 to 4 carbon atoms, and more preferably a methyl group, an ethanol group or propanol. Indicates a group.
上記のアルキル基としては、例えば、メチル基、エチル基、プロピル基、イソプロピル基、ブチル基、イソブチル基、２級ブチル基、ターシャリブチル基、ペンチル基、イソペンチル基、２級ペンチル基、ネオペンチル基、ターシャリペンチル基、ヘキシル基、２級ヘキシル基、ヘプチル基、２級ヘプチル基、オクチル基、２−エチルヘキシル基、２級オクチル基、ノニル基、２級ノニル基、デシル基、２級デシル基、ウンデシル基、２級ウンデシル基、ドデシル基、２級ドデシル基、トリデシル基、イソトリデシル基、２級トリデシル基、テトラデシル基、２級テトラデシル基、ヘキサデシル基、２級ヘキサデシル基、ステアリル基、エイコシル基、ドコシル基、テトラコシル基、トリアコンチル基、２−ブチルオクチル基、２−ブチルデシル基、２−ヘキシルオクチル基、２−ヘキシルデシル基、２−オクチルデシル基、２−ヘキシルドデシル基、２−デシルテトラデシル基、２−ドデシルヘキサデシル基、モノメチル分枝−イソステアリル基等が挙げられる。 Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, secondary butyl, tertiary butyl, pentyl, isopentyl, secondary pentyl, and neopentyl. , Tertiary pentyl group, hexyl group, secondary hexyl group, heptyl group, secondary heptyl group, octyl group, 2-ethylhexyl group, secondary octyl group, nonyl group, secondary nonyl group, decyl group, secondary decyl group , Undecyl group, secondary undecyl group, dodecyl group, secondary dodecyl group, tridecyl group, isotridecyl group, secondary tridecyl group, tetradecyl group, secondary tetradecyl group, hexadecyl group, secondary hexadecyl group, stearyl group, eicosyl group, Docosyl group, tetracosyl group, triacontyl group, 2-butyloctyl group, 2-butylde Group, 2-hexyloctyl group, 2-hexyldecyl group, 2-octyldecyl group, 2-hexyldecyl group, 2-decyltetradecyl group, 2-dodecylhexadecyl group, monomethyl branched-isostearyl group, etc. Can be mentioned.
上記のアルケニル基としては、例えば、ビニル基、アリル基、プロペニル基、イソプロペニル基、ブテニル基、イソブテニル基、ペンテニル基、イソペンテニル基、ヘキセニル基、ヘプテニル基、オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基、テトラデセニル基、オレイル基等が挙げられる。 Examples of the alkenyl group include vinyl group, allyl group, propenyl group, isopropenyl group, butenyl group, isobutenyl group, pentenyl group, isopentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, Examples include an undecenyl group, a dodecenyl group, a tetradecenyl group, and an oleyl group.
上記のアリール基としては、例えば、フェニル基、トルイル基、キシリル基、クメニル基、メシチル基、ベンジル基、フェネチル基、スチリル基、シンナミル基、ベンズヒドリル基、トリチル基、エチルフェニル基、プロピルフェニル基、ブチルフェニル基、ペンチルフェニル基、ヘキシルフェニル基、ヘプチルフェニル基、オクチルフェニル基、ノニルフェニル基、デシルフェニル基、ウンデシルフェニル基、ドデシルフェニル基、スチレン化フェニル基、ｐ−クミルフェニル基、フェニルフェニル基、ベンジルフェニル基、α−ナフチル基、β−ナフチル基等が挙げられる。 Examples of the aryl group include phenyl group, toluyl group, xylyl group, cumenyl group, mesityl group, benzyl group, phenethyl group, styryl group, cinnamyl group, benzhydryl group, trityl group, ethylphenyl group, propylphenyl group, Butylphenyl, pentylphenyl, hexylphenyl, heptylphenyl, octylphenyl, nonylphenyl, decylphenyl, undecylphenyl, dodecylphenyl, styrenated phenyl, p-cumylphenyl, phenylphenyl Benzylphenyl group, α-naphthyl group, β-naphthyl group and the like.
また、上記のシクロアルキル基及びシクロアルケニル基としては、例えば、シクロペンチル基、シクロヘキシル基、シクロヘプチル基、メチルシクロペンチル基、メチルシクロヘキシル基、メチルシクロヘプチル基、シクロペンテニル基、シクロヘキセニル基、シクロヘプテニル基、メチルシクロペンテニル基、メチルシクロヘキセニル基、メチルシクロヘプテニル基等が挙げられる。 Examples of the cycloalkyl group and cycloalkenyl group include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a methylcyclopentyl group, a methylcyclohexyl group, a methylcycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, Examples include a methylcyclopentenyl group, a methylcyclohexenyl group, and a methylcycloheptenyl group.
一方、炭素数１〜４のアルカノール基としては、例えば、メタノール基、エタノール基、プロパノール基、ブタノール基、イソプロパノール基、イソブタノール基、ターシャリブタノール基等が挙げられる。 On the other hand, examples of the alkanol group having 1 to 4 carbon atoms include a methanol group, an ethanol group, a propanol group, a butanol group, an isopropanol group, an isobutanol group, and a tertiary butanol group.
式（２）で示されるノニオン界面活性剤において、Ｒ４は、炭素数８〜１８の炭化水素基を示す。炭素数が８未満であると、良好な洗浄力が得られないことがあり、また、菌への浸透力低下に伴い殺菌力が低下することがある。一方、炭素数が１８を超えると、過酢酸製剤への溶解性が低下して、長期の保存で過酢酸製剤が分離することがある。上記の炭素数８〜１８の炭化水素基としては、例えば、オクチル基、イソオクチル基、２級オクチル基、ノニル基、イソノニル基、２級ノニル基、デシル基、イソデシル基、２級デシル基、ウンデシル基、イソウンデシル基、２級ウンデシル基、ドデシル基、イソドデシル基、２級ドデシル基、トリドデシル基、イソトリデシル基、２級トリドデシル基、テトラドデシル基、イソテトラドデシル基、２級テトラドデシル基、ヘキサデシル基、イソヘキサデシル基、２級ヘキサデシル基、オクタデシル基、イソオクタデシル基、２級オクタデシル基などのアルキル基；オクテニル基、ノネニル基、デセニル基、ウンデセニル基、ドデセニル基、テトラデセニル基、ヘキサデセニル基、オクタデセニル基などのアルケニル基；キシリル基、クメニル基、エチルフェニル基、プロピルフェニル基、ブチルフェニル基などのアリール基などが挙げられる。これらのうち、アルキル基が好ましく、炭素数炭素数８〜１５のアルキル基がより好ましく、炭素数９〜１３のアルキル基が更に好ましい。 In the nonionic surfactant represented by the formula (2), R 4 represents a hydrocarbon group having 8 to 18 carbon atoms. When the number of carbon atoms is less than 8, good detergency may not be obtained, and sterilizing power may be reduced along with a decrease in the ability to penetrate bacteria. On the other hand, when the number of carbon atoms exceeds 18, the solubility in the peracetic acid preparation may decrease, and the peracetic acid preparation may be separated during long-term storage. Examples of the hydrocarbon group having 8 to 18 carbon atoms include octyl, isooctyl, secondary octyl, nonyl, isononyl, secondary nonyl, decyl, isodecyl, secondary decyl, and undecyl. Group, isoundecyl group, secondary undecyl group, dodecyl group, isododecyl group, secondary dodecyl group, tridodecyl group, isotridecyl group, secondary tridodecyl group, tetradodecyl group, isotetradodecyl group, secondary tetradodecyl group, hexadecyl group, Alkyl groups such as isohexadecyl group, secondary hexadecyl group, octadecyl group, isooctadecyl group, secondary octadecyl group; octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group, tetradecenyl group, hexadecenyl group, octadecenyl group, etc. Alkenyl group; xylyl group, cumeni Group, ethylphenyl group, propylphenyl group, an aryl group, such as butylphenyl group. Among these, an alkyl group is preferable, an alkyl group having 8 to 15 carbon atoms is more preferable, and an alkyl group having 9 to 13 carbon atoms is still more preferable.
式（２）で示されるノニオン界面活性剤において、Ｒ５は、炭素数２又は３のアルキレン基を示す。該アルキレン基としては、エチレン基、プロピレン基、１−メチルエチレン基、２−メチルエチレン基が挙げられる。Ｒ５は、ｎ個の繰り返し構造を有し、ｎ個のＲ５は同一であっても異なっていてもよい。ここで、ｎ個のＲ５の５０モル％以上がエチレン基であることが好ましく、８０モル％以上がエチレン基であることがより好ましく、全てがエチレン基であることが更に好ましい。Ｒ５が炭素数４以上では、過酢酸製剤への溶解性が低下して、過酢酸製剤に溶解しないことがある。 In the nonionic surfactant represented by the formula (2), R 5 represents an alkylene group having 2 or 3 carbon atoms. Examples of the alkylene group include an ethylene group, a propylene group, a 1-methylethylene group, and a 2-methylethylene group. R 5 has n repeating structures, and the n R 5 may be the same or different. Here, it is preferable that 50 mol% or more of n pieces of R 5 is an ethylene group, more preferably 80 mol% or more is an ethylene group, and it is still more preferable that all are ethylene groups. When R 5 has 4 or more carbon atoms, the solubility in the peracetic acid preparation may be reduced and the peracetic acid preparation may not be dissolved.
また、式（２）で示されるノニオン界面活性剤において、ｎは、６〜２０、好ましくは６〜１５の数を示す。ｎが６未満では、過酢酸製剤への溶解性が低下して、過酢酸製剤に溶解しないことがあり、２０を超えると、配合した過酢酸や過酸化水素が過剰に分解し、過酸化水素や過酢酸濃度が低下して殺菌性及び洗浄性に悪影響を与えることがある。 Moreover, in the nonionic surfactant shown by Formula (2), n shows the number of 6-20, Preferably 6-15. If n is less than 6, the solubility in the peracetic acid preparation may be reduced and may not dissolve in the peracetic acid preparation. If it exceeds 20, the blended peracetic acid and hydrogen peroxide will be excessively decomposed, resulting in hydrogen peroxide. In addition, the concentration of peracetic acid may be lowered and the bactericidal properties and cleaning properties may be adversely affected.
上記の式（１）又は式（２）で示される界面活性剤は、過酢酸製剤に予め混合して使用することもできるし、又は、本洗の開始前又は本洗中に、過酢酸製剤とは別に本洗槽（洗濯槽）に、直接投入して使用することもできる。 The surfactant represented by the above formula (1) or formula (2) can be mixed with a peracetic acid preparation in advance, or can be used before or during the main washing. Apart from this, it can also be used directly in the main washing tub (washing tub).
過酢酸製剤に予め混合するに際しては、界面活性剤の濃度は、過酢酸製剤中に、好ましくは０．１〜１０質量％、より好ましくは０．１５〜５質量％、更に好ましくは０．３〜３質量％である。上記下限未満では、殺菌効果が不十分となり易く、上記上限を超えては、過酢酸の安定性が低下したり、また、本洗槽中での泡立ち、濯ぎ後に界面活性剤の残留が生ずることがある。また、本洗槽に、直接投入して使用するに際しては、界面活性剤の濃度が、過酢酸製剤に対して、上記と同一になるように計量して投入すればよい。 When pre-mixed with the peracetic acid preparation, the concentration of the surfactant in the peracetic acid preparation is preferably 0.1 to 10% by mass, more preferably 0.15 to 5% by mass, and still more preferably 0.3. ˜3 mass%. If it is less than the above lower limit, the bactericidal effect tends to be insufficient, and if it exceeds the above upper limit, the stability of peracetic acid is lowered, or foaming in the main washing tank, residual surfactant occurs after rinsing. There is. In addition, when directly used in the main washing tank, the surfactant concentration may be measured and added to the peracetic acid preparation so as to be the same as described above.
本発明の過酢酸製剤には、本発明の効果を損なわない範囲で、殺菌剤及び洗浄剤に使用する、他の公知の添加剤を含めることができる。該添加剤としては、例えば、ノニオン界面活性剤、アニオン界面活性剤、カチオン界面活性剤、両性界面活性剤等の界面活性剤、キレート剤、溶剤、酸化防止剤、香料、色素、防腐剤等が挙げられる。 The peracetic acid preparation of the present invention can contain other known additives used for the disinfectant and the cleaning agent as long as the effects of the present invention are not impaired. Examples of the additive include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants and other surfactants, chelating agents, solvents, antioxidants, fragrances, dyes, preservatives, and the like. Can be mentioned.
本発明の過酢酸製剤の製造方法は、特に限定されるものではなく、公知の方法を使用することができる。例えば、酢酸と過酸化水素とを水中で混合し、必要に応じて、触媒や安定化剤を加えることにより、酢酸と過酸化水素が反応して過酢酸が生成され、過酢酸製剤の平衡溶液が得られる。更に好ましくは、この平衡溶液に、式（１）及び／又は式（２）で示される界面活性剤を添加することができる。酢酸又は過酸化水素の濃度を高くすればするほど、より一層高濃度の過酢酸が生成されるので、上記の過酢酸濃度となるように、酢酸及び過酸化水素の濃度を設定すればよい。 The manufacturing method of the peracetic acid formulation of this invention is not specifically limited, A well-known method can be used. For example, acetic acid and hydrogen peroxide are mixed in water, and if necessary, a catalyst or stabilizer is added to react the acetic acid with hydrogen peroxide to produce peracetic acid. Is obtained. More preferably, a surfactant represented by the formula (1) and / or the formula (2) can be added to the equilibrium solution. The higher the concentration of acetic acid or hydrogen peroxide is, the higher the concentration of peracetic acid is generated. Therefore, the concentration of acetic acid and hydrogen peroxide may be set so as to obtain the above-mentioned concentration of peracetic acid.
本洗において使用される洗剤は、アルカリ洗剤である。該アルカリ洗剤としては、上記の予洗で使用したものを使用することができる。好ましくは、濃度０．１質量％の水溶液において、そのｐＨが８．０を超えるアルカリ洗剤が使用される。該アルカリ洗剤を使用することにより、過酢酸と併用したとき、過酢酸の分解が一層促進され、それにより殺菌効果を高めることができる。本洗において使用するアルカリ洗剤の濃度は、好ましくは０．０５〜１０質量％、より好ましくは０．２〜５質量％である。アルカリ洗剤の濃度が上記上限を超えては、未溶解のアルカリ洗剤が濯ぎ工程に持ち込まれたり、過酢酸の分解速度が大きくなり過ぎ、上記下限未満では、汚れ除去能力が低下する。また、アルカリ洗剤に加えて、好ましくは中性洗剤を使用することもできる。該中性洗剤としても、上記の予洗で使用したものを使用することができる。該中性洗剤の濃度は、好ましくは０．０１〜１質量％、より好ましくは０．０３〜０．３質量％である。 The detergent used in the main washing is an alkaline detergent. As this alkaline detergent, what was used by said pre-washing can be used. Preferably, an alkaline detergent having a pH exceeding 8.0 in an aqueous solution having a concentration of 0.1% by mass is used. By using this alkaline detergent, when used in combination with peracetic acid, the decomposition of peracetic acid is further promoted, thereby enhancing the bactericidal effect. The concentration of the alkaline detergent used in the main washing is preferably 0.05 to 10% by mass, more preferably 0.2 to 5% by mass. If the concentration of the alkaline detergent exceeds the above upper limit, undissolved alkaline detergent is brought into the rinsing process, or the decomposition rate of peracetic acid becomes too high. Further, in addition to the alkaline detergent, a neutral detergent can be preferably used. As the neutral detergent, those used in the pre-washing can be used. The concentration of the neutral detergent is preferably 0.01 to 1% by mass, more preferably 0.03 to 0.3% by mass.
本洗において、上記の洗剤は、上記の過酢酸製剤と組み合わせて使用される。洗剤は、予め過酢酸製剤と混合して使用してもよく、あるいは、その場で、例えば、本洗槽中で、混合して使用してもよい。後者の場合には、更に、界面活性剤及びビルダー等も、その場で混合することもできる。また、上記の洗剤及び過酢酸製剤に加えて、更に、過酸化水素を組み合わせて用いることもできる。ここで、過酢酸製剤と洗剤との比率は、質量比で、過酢酸製剤／洗剤＝０.０５〜１０であることが好ましく、より好ましくは０．１〜５である。 In the main washing, the detergent is used in combination with the peracetic acid preparation. The detergent may be used by mixing with a peracetic acid preparation in advance, or may be used by mixing it in place, for example, in a main washing tank. In the latter case, a surfactant and a builder can also be mixed on the spot. In addition to the above detergent and peracetic acid preparation, hydrogen peroxide can also be used in combination. Here, the ratio between the peracetic acid preparation and the detergent is, by mass ratio, preferably peracetic acid preparation / detergent = 0.05 to 10, more preferably 0.1 to 5.
上記の本洗は、好ましくは、自動式洗濯機の本洗槽（洗濯槽）において実施される。自動式洗濯機、例えば、連続多槽式洗濯機を用いて洗濯を行うに際して、上記の過酢酸製剤及び洗剤は本洗槽に投入される。連続多槽式洗濯機は、予洗／本洗／濯ぎの各浴槽が並設されており、そして、通常、本洗槽として、複数の浴槽が並設されている。それ故、最初の本洗槽に、過酢酸製剤及び洗剤を同時に投入し、これらを水に溶かして洗濯液とすることが好ましい。もちろん、最初の本洗槽ではなく、第二又は第三の本洗槽に投入することもできる。 The main washing is preferably performed in a main washing tub (washing tub) of an automatic washing machine. When washing is performed using an automatic washing machine, for example, a continuous multi-tank washing machine, the peracetic acid preparation and the detergent are put into the main washing tank. In the continuous multi-tank washing machine, pre-washing / main-washing / rinsing bathtubs are arranged in parallel, and a plurality of bathtubs are usually arranged in parallel as main-washing tanks. Therefore, it is preferable to add the peracetic acid preparation and the detergent to the first main washing tank at the same time and dissolve them in water to obtain a washing liquid. Of course, it can also be put into the second or third main washing tank instead of the first main washing tank.
上記のように、予洗、予洗に使用した水の抜き取り、任意的な予洗が終了した段階での濯ぎ、続く、本洗により、順次、洗濯及び殺菌がなされた被洗物は、次いで、好ましくは濯ぎ工程において濯がれる。本洗で使用された洗濯液が、排出された後、濯ぎ用の水、例えば、水道水が投入され、この水によって、常法に従い濯ぎが実施され、洗濯が終了する。洗濯された被洗物は、その後、乾燥機等で乾燥される。乾燥方法は特に限定されず、公知の方法を採用することができる。 As described above, the object to be washed that has been washed and sterilized sequentially by pre-washing, extraction of water used for pre-washing, rinsing at the stage where optional pre-washing is completed, and subsequent main washing is preferably Rinse in the rinsing process. After the washing liquid used in the main washing is discharged, rinsing water, for example, tap water, is introduced, and rinsing is performed according to a conventional method with this water, and the washing is completed. The laundry to be washed is then dried with a dryer or the like. A drying method is not specifically limited, A well-known method is employable.
本発明の方法に適用される被洗物は、特に限定されず、商業洗濯を行う全ての洗濯物を対象とすることができる。また、各種繊維製品においては、その素材も限定されない。好ましくは、ポリエステル及び綿が対象とされ、更に好ましくは、タオル及びバスマット等に使用される、吸水性の高い綿が対象とされる。例えば、ホテルのシーツ等の軽度な汚れの被洗物、病院などから搬出される、強い汚れの付着した被洗物等の幅広い範囲の洗濯物を対象とすることができる。 The article to be washed applied to the method of the present invention is not particularly limited, and can be any laundry that performs commercial laundry. Moreover, the raw material is not limited in various textile products. Polyester and cotton are preferable, and cotton with high water absorption used for towels and bath mats is more preferable. For example, it can be applied to a wide range of laundry such as a lightly soiled article such as a hotel sheet, or a washed object that is carried out of a hospital or the like and has a strong stain.
本発明の洗濯方法は、好ましくは、リネンサプライ業及びクリーニング業等で使用される業務用洗濯機において実施される。このような業務用洗濯機としては、予洗、本洗及び濯ぎを、夫々、単独槽で行うバッチ式洗濯機と、予洗、本洗及び濯ぎを、並設された複数の浴槽を使用して、被洗物をこれら各浴槽間を移動させながら連続して洗濯を行う連続多槽式洗濯機とがある。本発明の方法においては、いずれの洗濯機も使用可能であるが、連続多槽式洗濯機を用いることが特に好ましい。連続多槽式洗濯機は、更に、カウンターフロー方式洗濯機とバッチフロー方式洗濯機とに大別され、両者ともに使用可能である。カウンターフロー方式とは、本洗槽において上流側（第１槽側）から移送される被洗物に対向して、洗濯液を下流側から上流側に向かって移動させる方式である。バッチフロー方式には、本洗槽の洗濯液を移動させずに、被洗物のみを各浴槽間に移送させて洗濯する方式と、洗濯液と被洗物が同時に各浴槽間に移送されて洗濯をする方式があり、共に使用可能である。 The washing method of the present invention is preferably implemented in a commercial washing machine used in a linen supply industry, a cleaning industry, and the like. As such a commercial washing machine, using a batch type washing machine that performs pre-washing, main washing and rinsing in a single tank, respectively, and a plurality of bathtubs arranged in parallel for pre-washing, main washing and rinsing, There is a continuous multi-tank type washing machine that performs washing continuously while moving an object to be washed between these bathtubs. In the method of the present invention, any washing machine can be used, but it is particularly preferable to use a continuous multi-tank washing machine. The continuous multi-tank washing machine is further classified into a counter flow washing machine and a batch flow washing machine, and both can be used. The counter flow system is a system in which the washing liquid is moved from the downstream side toward the upstream side facing the article to be washed transferred from the upstream side (first tank side) in the main washing tank. In the batch flow method, the washing liquid in the main washing tub is not moved, and only the article to be washed is transferred between the bathtubs, and the washing liquid and the article to be washed are transferred between the bathtubs at the same time. There is a method of washing and can be used together.
上記の連続多槽式洗濯機としては、特に限定されず、公知のものを使用することができる。例えば、特許文献１に記載されているように、連続多槽式洗濯機は、両端に入口と出口を有するとともに、少なくとも下部側を各浴槽に分割する複数の隔壁を有する細長い外側ハウジングと、該外側ハウジングの各浴槽内に配設された短円筒状ドラムを軸方向に連結してなる内側ハウジングとを備え、内側ハウジングを回転させることによって、浴槽内の被洗物の予洗／本洗／濯ぎを各浴槽内で行いながら、ドラム間を各ドラム内に設置されたすくいシャベルの揺動により上流側から下流側に移送するように構成されている。 It does not specifically limit as said continuous multi-tub type washing machine, A well-known thing can be used. For example, as described in Patent Document 1, a continuous multi-tub washing machine has an elongated outer housing having an inlet and an outlet at both ends, and a plurality of partition walls that divide at least the lower side into each bathtub, An inner housing formed by axially connecting short cylindrical drums disposed in each bathtub of the outer housing, and rotating the inner housing to prewash / main wash / rinse the objects to be washed in the bathtub While being performed in each bathtub, the drums are transferred from the upstream side to the downstream side by swinging of a scoop shovel installed in each drum.
本発明の方法においては、洗濯温度（本洗中の洗濯液の温度）は、特に限定されものではないが、４０〜８０℃であることが好ましい。過酢酸製剤とアルカリ洗剤及び／又は中性洗剤とを併用することにより、従来の高温洗濯に比べて、４０〜６０℃という中温での洗濯も可能であり、温度制御のために燃料コストを低減することができる。 In the method of the present invention, the washing temperature (the temperature of the washing liquid during the main washing) is not particularly limited, but is preferably 40 to 80 ° C. By using a peracetic acid formulation in combination with an alkaline detergent and / or a neutral detergent, washing at a medium temperature of 40-60 ° C is possible compared to conventional high-temperature washing, reducing fuel costs for temperature control. can do.
本発明における各槽での処理速度はタクトタイムで評価される。タクトタイムは、直接、生産性及びコストに反映されるために、短いほど好ましいが、短すぎると汚れの除去、殺菌などを十分達成し得なくなることがある。本発明においてタクトタイムは、好ましくは１．５〜２０分間、より好ましくは２〜１０分間、更に好ましくは３〜５分間である。ここで、タクトタイムとは、各槽に被洗物が移動した時点から、被洗物がその槽から排出された時点までの槽内での滞留時間を意味する。従って、例えば、同一槽において、水の投入、洗浄、及び水抜きが実施されるときは、この合計を含めた時間を言う。 The processing speed in each tank in the present invention is evaluated by tact time. Since the tact time is directly reflected in productivity and cost, it is preferable that the tact time is as short as possible. However, if the tact time is too short, removal of dirt and sterilization may not be sufficiently achieved. In the present invention, the tact time is preferably 1.5 to 20 minutes, more preferably 2 to 10 minutes, and further preferably 3 to 5 minutes. Here, the takt time means the residence time in the tank from the time when the article to be washed moves to each tank to the time when the article to be washed is discharged from the tank. Therefore, for example, when water is added, washed and drained in the same tank, the time including this total is referred to.
以下の実施例において、本発明を更に詳細に説明するが、本発明はこれら実施例により限定されるものではない。 In the following examples, the present invention will be described in more detail, but the present invention is not limited to these examples.
下記の実施例及び比較例において使用した過酢酸製剤、界面活性剤及び洗剤は、下記の通りである。 The peracetic acid formulations, surfactants and detergents used in the following examples and comparative examples are as follows.
＜過酢酸製剤＞
使用した過酢酸製剤Ｉ、ＩＩ、ＩＩＩ及びＩＶの各組成を下記の表１に示した。
<Peracetic acid formulation>
The compositions of the peracetic acid formulations I, II, III and IV used are shown in Table 1 below.
＜界面活性剤＞
式（１）で示される両性界面活性剤（Ｓ１）：ドデシルジメチルアミンオキシド
式（２）で示されるノニオン界面活性剤（Ｓ２）：ドデシルアルコールエチレンオキシド９モル付加物（式（２）において、Ｒ４がドデシル基であり、Ｒ５がエチレン基であり、ｎが９である。）
<Surfactant>
Amphoteric surfactant represented by formula (1) (S1): Nonionic surfactant represented by dodecyldimethylamine oxide formula (2) (S2): 9-mol adduct of dodecyl alcohol ethylene oxide (in formula (2), R 4 Is a dodecyl group, R 5 is an ethylene group, and n is 9.)
＜洗剤＞
アルカリ洗剤：クラリアントジャパン株式会社製シスタクリーンＦＭ（商標）
中性洗剤：クラリアントジャパン株式会社製シスタクリーンＪ−１（商標）
<Detergent>
Alkaline detergent: Sister Clean FM (trademark) manufactured by Clariant Japan
Neutral detergent: Sistaclean J-1 (trademark) manufactured by Clariant Japan
また、下記の実施例及び比較例において使用した殺菌対象菌、被洗サンプル及び洗濯機は、下記の通りである。 Moreover, the bacteria to be sterilized, the sample to be washed, and the washing machine used in the following Examples and Comparative Examples are as follows.
＜殺菌対象菌＞
殺菌対象菌として、耐熱性菌であるバチルス・セレウス（Ｂａｃｉｌｌｕｓ ｃｅｒｅｕｓ）（以下、「セレウス菌」と言うことがある）を使用した。セレウス菌としては、Ｒａｂｅｎ Ｌａｂｓ社製Ｂａｃｉｌｌｕｓ ｃｅｒｅｕｓ ＡＴＣＣ Ｎｏ．１１７７８（菌数：１．５×１０７ｃｆｕ／ミリリットル）を使用した。セレウス菌は、好気性の芽胞形成桿菌であり、耐熱性の芽胞を形成する。
<Sterilized bacteria>
As a bacterium to be sterilized, a heat-resistant bacterium, Bacillus cereus (hereinafter sometimes referred to as “Cereus bacterium”) was used. As Bacillus cereus, Bacillus cereus ATCC No. manufactured by Raben Labs. 11778 (the number of bacteria: 1.5 × 10 7 cfu / ml) was used. Bacillus cereus is an aerobic spore-forming rod and forms heat-resistant spores.
＜被洗サンプル＞
汚れ付着サンプル（被洗サンプルＡ）：人工汚染布［ＥＭＰＡ社製血液汚染布ＥＭＰＡ−１１１（商標）］を１０ｃｍ×１０ｃｍに切断したもの
汚れ付着なしサンプル（被洗サンプルＢ）：人工汚染布［ＥＭＰＡ社製血液汚染布ＥＭＰＡ−１１１（商標）］を１０ｃｍ×１０ｃｍに切断したものを、目視により汚れが認められなくなるまで、アルカリ洗剤で十分に洗濯したもの
<Sample to be washed>
Dirt adherence sample (washed sample A): Artificial contaminated cloth [EMPA blood contaminated cloth EMPA-111 (trademark)] cut to 10 cm × 10 cm Sample without dirt adherence (washed sample B): Artificial contaminated cloth [ A EMPA blood-stained cloth EMPA-111 (trademark)] that has been cut into 10 cm × 10 cm and thoroughly washed with an alkaline detergent until no stains are observed visually.
上記の被洗サンプルＡ及びＢは、いずれも、予めセレウス菌が検出されないことを確認した。この確認は、上記の被洗サンプルＡ及びＢを３００ミリリットル三角フラスコに移し、滅菌水１００ミリリットルを加えた。該三角フラスコを滅菌したゴム栓で密閉した後、室温で振とう機を使用して、３０往復／秒の振動数で３０秒間振とうして抽出処理を実施した。次いで、抽出完了後の滅菌水を５００マイクロリットル採取し、シャーレ内の直径５０ｍｍのプレート上のセレウス菌培地に、全量添加した後、綿棒で均一になるように培地上に広げた。次いで、シャーレの蓋をした後、シャーレごと該プレートをひっくり返し３５±２℃で４８時間培養した。培地上のコロニー数は、培養後、デジタルカメラで寒天培地の写真撮影を行い、２０インチ液晶モニター全面に表示して、目視で観察して確認したものである。 In both of the samples A and B to be washed, it was confirmed in advance that no Bacillus cereus was detected. For this confirmation, the samples A and B to be washed were transferred to a 300 ml Erlenmeyer flask and 100 ml of sterilized water was added. The Erlenmeyer flask was sealed with a sterilized rubber stopper, and then extracted at a room temperature using a shaker at a frequency of 30 reciprocations / second for 30 seconds. Next, 500 microliters of sterilized water after completion of extraction was collected, added in total to the Bacillus cereus medium on a 50 mm diameter plate in a petri dish, and then spread on the medium so as to be uniform with a cotton swab. Next, after the petri dish was capped, the plate was turned over with the petri dish and cultured at 35 ± 2 ° C. for 48 hours. The number of colonies on the culture medium was confirmed by observing the surface of the 20-inch liquid crystal monitor by taking a photograph of the agar medium with a digital camera after culturing.
次いで、上記の市販のセレウス菌原液１ミリリットルを、生理食塩水９９ミリリットルに加えて１００倍に希釈し、１ミリリットル当たり１．５×１０５ｃｆｕ（コロニー形成単位）のセレウス菌を含む溶液を作製し、これを１ミリリットル滴下したものを被洗サンプルとした。 Next, 1 ml of the above commercially available Bacillus cereus stock solution was added to 99 ml of physiological saline and diluted 100 times to prepare a solution containing 1.5 × 10 5 cfu (colony forming unit) of Bacillus cereus per ml. Then, 1 ml of this was dropped into a sample to be washed.
＜洗濯機＞
連続多槽式洗濯機（三菱重工産業機器株式会社製１２槽式全自動洗濯機タイプＣ１９−１２）を使用した。この洗濯機は、第１〜２槽で予洗、第３〜８槽で本洗、第９〜１１槽ですすぎを行うことができる連続多槽式洗濯機である。なお、第１２槽は加工処理槽であり、この実施例及び比較例では加工処理を実施していない。
<Washing machine>
A continuous multi-tank washing machine (Mitsubishi Heavy Industries Industrial Equipment Co., Ltd., 12-tank fully automatic washing machine type C19-12) was used. This washing machine is a continuous multi-tank washing machine that can perform pre-washing in the first and second tanks, main washing in the third to eighth tanks, and rinsing in the ninth to eleventh tanks. Note that the twelfth tank is a processing tank, and no processing is performed in this example and the comparative example.
下記の実施例及び比較例において使用した評価方法は、下記の通りである。 The evaluation methods used in the following examples and comparative examples are as follows.
＜殺菌効果＞
殺菌効果は、仕上がった被洗サンプルのセレウス菌数で評価した。仕上がった被洗サンプルを３００ミリリットル三角フラスコに移し、滅菌水１００ミリリットルを加えた。該三角フラスコを滅菌したゴム栓で密閉した後、室温で振とう機を使用して、３０往復／秒の振動数で３０秒間振とうして抽出処理を実施した。次いで、抽出完了後の滅菌水を５００マイクロリットル採取し、シャーレ内の直径５０ｍｍのプレート上のセレウス菌培地に、全量添加した後、綿棒で均一になるように培地上に広げた。次いで、シャーレの蓋をした後、シャーレごと該プレートをひっくり返し３５±２℃で４８時間培養した。培地上のコロニー数は、培養後、デジタルカメラで寒天培地の写真撮影を行い、２０インチ液晶モニター全面に表示して、目視でコロニー数をカウントした。コロニー数が多い場合には、２０インチ液晶モニター全面に表示した映像をハードコピーしてその数をカウントした。評価は、いずれの実施例及び比較例においても、被洗サンプル３枚を使用し、夫々、上記のようにしてコロニー数をカウントし、被洗サンプル３枚のコロニー数の平均値を算出し、該平均値を使用して実施した。コロニー数の平均値が、３０以下であれば合格、５以下であれば、非常に良好とした。
<Bactericidal effect>
The bactericidal effect was evaluated by the number of Bacillus cereus in the finished sample to be washed. The finished sample to be washed was transferred to a 300 ml Erlenmeyer flask and 100 ml of sterile water was added. The Erlenmeyer flask was sealed with a sterilized rubber stopper, and then extracted at a room temperature using a shaker at a frequency of 30 reciprocations / second for 30 seconds. Next, 500 microliters of sterilized water after completion of extraction was collected, added in total to the Bacillus cereus medium on a 50 mm diameter plate in a petri dish, and then spread on the medium so as to be uniform with a cotton swab. Next, after the petri dish was capped, the plate was turned over with the petri dish and cultured at 35 ± 2 ° C. for 48 hours. After incubation, the number of colonies on the medium was photographed with a digital camera, displayed on the entire surface of a 20-inch liquid crystal monitor, and counted visually. When the number of colonies was large, the images displayed on the entire surface of the 20-inch liquid crystal monitor were hard copied and counted. In any of the examples and comparative examples, the evaluation uses three samples to be washed, respectively, counts the number of colonies as described above, calculates the average value of the number of colonies of the three samples to be washed, It was carried out using the average value. If the average value of the number of colonies was 30 or less, it was acceptable, and if it was 5 or less, it was considered very good.
＜臭気＞
過酢酸製剤取扱い時、及び、本洗中の連続多槽洗濯機周辺での臭気を評価した。いずれの場合にも、実施例及び比較例を実施している空調室（約１００ｍ２、２４℃、６０％ＲＨに設定した独立型空調機使用）に、３人の検査員が、夫々、一定時間間隔で３回入室して入室時に感じた官能テストにより評価した。評価方法は、臭気が強く感じられる場合を５点、やや強い場合を４点、はっきりと感じる場合を３点、弱い場合を２点、非常に弱い場合を１点とし、３人の検査員の３回の合計点で評価した。評価結果は、いずれも、以下のように分類した。
◎（９点以上１６点以下）：臭気小さく作業環境良好
○（１６点を超え２３点以下）：若干臭気が感じられるが特に作業環境に支障なし
Δ（２３点を超え３０点以下）：臭気が感じられるが作業に支障なし
×（３０点を超え３７点以下）：臭気強く作業環境不良
××（３７点を超え４５点以下）：臭気強く作業継続には強力な排気装置が必要
<Odor>
The odor around the peracetic acid preparation and around the continuous multi-tank washing machine during the main washing was evaluated. In any case, three inspectors are fixed in the air conditioning room (using an independent air conditioner set to about 100 m 2 , 24 ° C., 60% RH) in which the examples and comparative examples are implemented. I entered the room three times at time intervals and evaluated it by a sensory test that I felt when I entered the room. The evaluation method is 5 points when the odor is felt strongly, 4 points when it is slightly strong, 3 points when it is clearly felt, 2 points when it is weak, and 1 point when it is very weak. Evaluation was made with 3 total points. All the evaluation results were classified as follows.
◎ (9 to 16 points): Small odor and good working environment ○ (Over 16 points and 23 points or less): Slight odor is felt but there is no particular problem in working environment Δ (Over 23 points and 30 points or less): Odor However, there is no hindrance to the work × (over 30 points and under 37 points): Strong odor and poor working environment XX (exceeding 37 points and under 45 points): Strong odor and requires a powerful exhaust system to continue the work
＜洗濯後の汚れ＞
洗濯後の被洗サンプルを目視により観察して評価した。
<Dirt after washing>
The washed sample after washing was visually observed and evaluated.
（実施例１〜８及び比較例１〜５）
被洗物としては、上記のようにして作製した被洗サンプル３枚と、ホテルのシーツ４０ｋｇとを一緒にしたものを使用した。被洗物の洗濯は、空調室（約１００ｍ２、２４℃、６０％ＲＨに設定した独立型空調機使用）内で上記の連続多槽式洗濯機を使用して、下記の通りに実施した。連続多槽式洗濯機の第１〜２槽を予先槽として用いて、被洗物を予洗し（予洗工程）、第３槽で予洗に使用した水の水抜き後、水道水を補給して濯ぎを実施し、並びに、所望により、該濯ぎに使用した水の水抜き後、水道水を補給して、更に、濯ぎを実施する操作を所定回数繰り返し（水抜き工程）、次いで、第４槽において、第５槽からオーバーフローする洗濯水により被洗物を洗濯しつつ第５槽に移送し、第５槽でアルカリ洗剤を投入し、第５〜８槽で被洗物の本洗を実施した（本洗工程）。次いで、第９〜１１槽で濯ぎを行い（濯ぎ工程）、次いで、乾燥した（乾燥工程）。ここで、１槽当たりのタクトタイムは、夫々、４分間とした。
(Examples 1-8 and Comparative Examples 1-5)
As the object to be cleaned, a combination of three samples to be cleaned prepared as described above and 40 kg of a hotel sheet was used. Washing of the washing objects was carried out as follows using the above continuous multi-tank washing machine in an air conditioning room (use of an independent air conditioner set to about 100 m 2 , 24 ° C., 60% RH). . First and second tanks of the continuous multi-tank washing machine are used as pre-serving tanks, the objects to be washed are pre-washed (pre-washing process), and the water used for pre-washing in the third tank is replenished with tap water. In addition, if necessary, after draining water used for the rinse, tap water is replenished and further rinsed is repeated a predetermined number of times (water draining step). In the tank, the washing object was transferred to the fifth tank while washing with the washing water overflowing from the fifth tank, the alkaline detergent was added in the fifth tank, and the main washing was performed in the fifth to eighth tanks ( Main washing step). Next, rinsing was performed in the ninth to eleventh tanks (rinsing step) and then dried (drying step). Here, the takt time per tank was 4 minutes, respectively.
第１〜２槽の予洗工程における被洗物の予洗は、アルカリ洗剤及び中性洗剤を使用して実施した。アルカリ洗剤及び中性洗剤は、予洗水３００ｋｇ（約３００リットル）中に、夫々、アルカリ洗剤が０．８質量％、また、中性洗剤が０．０８質量％になるように添加した。ここで、予洗水としては、濯ぎ工程において、水道水を使用して一度濯ぎを行ったのちの水をリサイクルして使用した。 Pre-washing of the objects to be washed in the pre-washing process of the first and second tanks was performed using an alkaline detergent and a neutral detergent. The alkaline detergent and neutral detergent were added to 300 kg (about 300 liters) of prewash water so that the alkaline detergent was 0.8% by mass and the neutral detergent was 0.08% by mass, respectively. Here, as pre-washing water, in the rinsing process, the water after rinsing once using tap water was recycled and used.
水抜き工程、即ち、第３槽では、予洗後の、アルカリ洗剤及び中性洗剤を含む水を抜いた後、水道水約１５０リットル（予洗に使用した水の約５０質量％）を投入して濯ぎを実施し、かつ、所望により、更に、該濯ぎに使用した水を抜出し、次いで、水道水約１５０リットルを投入して濯ぎを実施する操作を繰り返した。表２における水抜き回数は、予洗後の水の水抜き、及び、上記の濯ぎに使用した水の水抜き回数の合計を言う。例えば、水抜き回数１回は、予洗に使用した水を抜き、水道水を投入して濯ぎをし、その濯ぎに使用した水を抜かずに、本洗に供したものであり、水抜き回数２回は、予洗に使用した水を抜き、水道水を投入して濯ぎをし、更に、その濯ぎに使用した水を抜き、水道水を投入して濯ぎをし、その濯ぎに使用した水を抜かずに、本洗に供したものであり、水抜き回数３回は、予洗に使用した水を抜き、水道水を投入して濯ぎをし、更に、その濯ぎに使用した水を抜き、水道水を投入して濯ぎをし、次いで、更に、その濯ぎに使用した水を抜き、水道水を投入して濯ぎをし、その濯ぎに使用した水を抜かずに、本洗に供したものである。また、表３における水抜きの回数０回は、予洗は実施したが、予洗に使用した水の水抜きを実施せず、そのまま本洗に供したことを意味する。 In the 3rd tank, after draining water containing alkaline detergent and neutral detergent after pre-washing, about 150 liters of tap water (about 50% by mass of water used for pre-washing) is added. Rinsing was carried out and, if desired, water used for the rinsing was further extracted, and then about 150 liters of tap water was added to carry out rinsing. The number of drains in Table 2 refers to the total number of drains of water after pre-washing and the number of drains of water used for the rinsing. For example, once draining water is drained from the water used for pre-washing, rinsed by adding tap water, and used for main washing without draining the water used for rinsing. Twice the water used for pre-washing, rinse with tap water, drain the water used for the rinse, rinse with tap water, and drain the water used for the rinse. The water was used for the main washing without draining. When the water was drained three times, the water used for pre-washing was drained, rinsed with tap water, and the water used for the rinse was drained. Rinse with water, then drain the water used for the rinse, rinse with tap water, and use it for the main wash without draining the water used for the rinse. is there. Moreover, the frequency | count of water draining 0 times in Table 3 means that although pre-washing was implemented, the water used for pre-washing was not drained but was used for main washing as it was.
第４〜８槽の本洗工程における被洗物の本洗は、アルカリ洗剤、中性洗剤及び過酢酸製剤を使用して実施した。アルカリ洗剤及び中性洗剤は、水道水３００ｋｇ（約３００リットル）中に、夫々、アルカリ洗剤が０．８質量％、また、中性洗剤が０．０８質量％になるように添加した。一方、過酢酸製剤は、空調室内にある各過酢酸製剤の貯蔵容器から、連続多槽式洗濯機の殺菌剤用ストックタンクに手動ポンプを使用して移送し、次いで、過酢酸製剤濃度が、第５槽において、表２及び３に記載の所定濃度になるように計量して、第５槽に投入した。ここで、第５槽の過酢酸濃度が、所定濃度になっていることを、理工協産株式会社製過酢酸・過酸化水素分析計（ポータブル型）を使用して、ヨウ素水溶液の電気化学的測定法により測定しチェックした。また、洗濯中の洗濯槽温度は、第５槽の温度をモニターしながら洗濯槽温度（第５〜８槽の温度）が所定の温度となるように水蒸気により制御した。 The main washing of the objects to be washed in the fourth to eighth tank main washing steps was performed using an alkaline detergent, a neutral detergent and a peracetic acid preparation. The alkaline detergent and neutral detergent were added to 300 kg (about 300 liters) of tap water so that the alkaline detergent was 0.8% by mass and the neutral detergent was 0.08% by mass, respectively. On the other hand, peracetic acid preparations are transferred from the storage container of each peracetic acid preparation in the air-conditioning room to a stock tank for disinfectant of a continuous multi-tank washing machine using a manual pump. In the 5th tank, it measured so that it might become the predetermined density | concentration of Table 2 and 3, and it injected into the 5th tank. Here, using the peracetic acid / hydrogen peroxide analyzer (portable type) manufactured by Riko Kyosan Co., Ltd., confirm that the concentration of peracetic acid in the fifth tank is a predetermined concentration. It was measured and checked by the measuring method. In addition, the temperature of the washing tub during washing was controlled with water vapor so that the temperature of the washing tub (the temperature of the fifth to eighth tubs) became a predetermined temperature while monitoring the temperature of the fifth tub.
第９〜１１槽の濯ぎ工程では、まず、第８槽で、本洗に使用したアルカリ洗剤、中性洗剤及び過酢酸製剤を含む水を排水した後、第９〜１１槽において、水道水を７ｔｏｎ／時間（約１２０ｋｇ／分）で連続的に供給して被洗物を濯いだ。濯ぎ完了後、被洗物を連続多槽式洗濯機から取り出し、次いで、乾燥して、殺菌効果測定用のサンプルとした。 In the rinsing process of the ninth to eleventh tanks, first, after draining water containing the alkaline detergent, neutral detergent and peracetic acid preparation used in the main washing in the eighth tank, tap water is poured in the ninth to eleventh tanks. The article to be washed was rinsed by continuously feeding at 7 ton / hour (about 120 kg / min). After completion of rinsing, the article to be washed was taken out from the continuous multi-tank washing machine and then dried to obtain a sample for measuring the sterilization effect.
各実施例及び比較例の洗濯の条件及びその結果を、表２及び３に示す。 Tables 2 and 3 show the laundry conditions and the results of the examples and comparative examples.
実施例１〜８は、本発明の洗濯方法により被洗物を処理したものである。いずれもセレウス菌の殺菌効果は良好であり、かつ、臭気も低く作業環境は良好であった。実施例６〜８は、水抜き回数を２回とし、かつ、過酢酸製剤ＩＩＩを使用して、本洗に使用した水中の過酢酸濃度を２００質量ｐｐｍ、３００質量ｐｐｍ及び５００質量ｐｐｍと変化させたものである。本洗中の温度制御に多少のバラツキはあったものの、いずれも良好なセレウス菌の殺菌効果及び低い臭気を示した。実施例２及び３は、水抜き回数を１回とし、かつ、過酸化製剤の種類を、夫々、ＩＩ及びＩＩＩとしたものである。過酸化製剤ＩＩ及びＩＩＩは、表１に示したように界面活性剤の種類が異なるものであるが、いずれの実施例においても、良好なセレウス菌の殺菌効果及び低い臭気を示した。また、実施例３及び６は、いずれも過酢酸製剤ＩＩＩを使用し、かつ、本洗水中の過酢酸製剤濃度を同一にして、水抜き回数を、夫々、１回及び２回としたものである。水抜き回数を多くするとセレウス菌の殺菌効果がより向上することが分かった。 In Examples 1 to 8, the objects to be washed are processed by the washing method of the present invention. In all cases, the bactericidal effect of Bacillus cereus was good, the odor was low, and the working environment was good. In Examples 6 to 8, the number of times of draining was set to 2 and the peracetic acid concentration in the water used for the main washing was changed to 200 mass ppm, 300 mass ppm and 500 mass ppm using the peracetic acid preparation III. It has been made. Although there was some variation in temperature control during the main washing, all showed good bactericidal effect of Bacillus cereus and low odor. In Examples 2 and 3, the number of times of draining was set to 1, and the types of peroxide preparations were set to II and III, respectively. As shown in Table 1, the peroxide preparations II and III were different in the kind of the surfactant, but in any of the Examples, good bactericidal effect of Bacillus cereus and low odor were exhibited. In Examples 3 and 6, the peracetic acid formulation III was used, the peracetic acid formulation concentration in the main wash water was the same, and the number of drains was 1 and 2 respectively. is there. It was found that the bactericidal effect of Bacillus cereus is improved by increasing the number of water drains.
一方、比較例１〜５は、予洗後に水抜きを実施しなかったものである（水抜き回数０回）。比較例１〜３は、本洗に使用した水中の過酢酸濃度を、夫々、２０質量ｐｐｍ、４０質量ｐｐｍ及び８０質量ｐｐｍと本発明の範囲内で変化させたものである。臭気は低く満足できるものであったが、セレウス菌に対する殺菌効果は著しく悪いものであった。また、比較例４は、セレウス菌に対する殺菌効果を高めるべく、本洗に使用した水中の過酢酸濃度を６００質量ｐｐｍと本発明の範囲を超えるものとしたものである。臭気が多く作業環境は悪いものであった。比較例５は、過酸化製剤ＩＶを使用したものである。臭気が多く作業環境は著しく悪かった。但し、防臭マスクを着用すれば作業可能であった On the other hand, Comparative Examples 1-5 did not carry out draining after pre-washing (0 times of draining). In Comparative Examples 1 to 3, the concentration of peracetic acid in water used for the main washing was changed to 20 mass ppm, 40 mass ppm, and 80 mass ppm, respectively, within the scope of the present invention. Although the odor was low and satisfactory, the bactericidal effect against Bacillus cereus was extremely poor. In Comparative Example 4, the concentration of peracetic acid in water used for the main washing was 600 mass ppm, exceeding the range of the present invention, in order to enhance the bactericidal effect against Bacillus cereus. There were many odors and the working environment was bad. Comparative Example 5 uses peroxide preparation IV. There was a lot of odor and the working environment was extremely bad. However, work was possible if a deodorant mask was worn.
本発明の洗濯方法は、安全性が高く、かつ、貯蔵安定性の優れた過酢酸製剤を使用して、被洗物に付着した耐熱性菌を、高い信頼性で洗濯殺菌できるのみならず、洗濯中の作業環境を損なわず、かつ、廃液処理が容易である。従って、今後、リネンサプライ業及びクリーニング業、並びに、病院内衣類洗濯などの業務用洗濯に利用されることが大いに期待される。 The washing method of the present invention is not only highly safe and using a peracetic acid preparation with excellent storage stability, can not only reliably and reliably sterilize heat-resistant bacteria attached to the washing object, The working environment during washing is not impaired and waste liquid treatment is easy. Therefore, it is highly expected that it will be used for business laundry such as linen supply and cleaning, and laundry washing in hospitals.
Claims (7)
下記式（２）で示されるノニオン界面活性剤
を更に含む、請求項１〜４のいずれか一つに記載の洗濯方法。 The water used for the main washing is an amphoteric surfactant represented by the following formula (1).
Nonionic surfactant represented by the following formula (2)
The washing method according to any one of claims 1 to 4 , further comprising:
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