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De­vel­op­ment of a dis­in­fect­ing car­bon diox­ide clean­ing pro­cess for sen­si­tive ma­te­ri­als using shoes for hy­gien­i­cal­ly de­mand­ing fields as an ex­am­ple and of a com­mer­cial­ly re­pro­cess­able model of a work shoe

AiF 14374 N

Dur­ing the pro­duc­tion and man­u­fac­tur­ing of foods as well as phar­ma­ceu­ti­cal and cos­met­ic prod­ucts, ex­ten­sive hy­gien­ic mea­sures have to be taken in order to pre­vent the con­sumers from pos­si­ble health risks (good man­u­fac­tur­ing prac­tice, HAC­CP-method, IFS-stan­dard). There­fore the con­tin­u­ous­ly in­creas­ing hy­giene re­quire­ments for work-wear com­ing in hy­gien­i­cal­ly de­mand­ing areas have to be met. The stan­dard DIN 10524 is a guide­line for man­u­fac­tur­ing, ex­ploita­tion and re­pro­cess­ing of work wear used in the food in­dus­try and en­sures these qual­i­ty re­quire­ments. Aim of the DIN 10524 is the avoid­ance of neg­a­tive ef­fects on food ar­ti­cles which can be caused by un­suit­able work-wear. Ac­cord­ing to DIN 10524, shoes, boots or clogs are part of the work wear. When the work wear is re­pro­cessed, a cer­tain hy­giene sta­tus must be guar­an­teed. Ac­cord­ing to DIN 10524 the clean­ing of work shoes in pri­vate house­holds is not com­pat­i­ble with qual­i­ty man­age­ment in hy­gien­i­cal­ly de­mand­ing areas and does not guar­an­tee a safe hy­giene sta­tus of the shoes.

Com­pa­nies with hy­gien­i­cal­ly de­mand­ing areas will have fu­ture re­quire­ments on the hy­giene of shoes. A safe and gen­tle dis­in­fec­tion pro­cess for shoes, how­ev­er, has not ex­ist­ed yet. The prob­lem could be solved by using the eco­log­i­cal­ly and eco­nom­i­cal­ly ad­van­ta­geous liq­uid or su­per­crit­i­cal car­bon diox­ide, which, due to the lat­est lit­er­a­ture, works also dis­in­fect­ing. With­in the re­search pro­ject a dis­in­fect­ing car­bon diox­ide clean­ing pro­cess for sen­si­tive ma­te­ri­als using shoes for hy­gien­i­cal­ly de­mand­ing fields as an ex­am­ple and a com­mer­cial­ly re­pro­cess­able model of a work shoe were de­vel­oped.

We thank the Ar­beits­ge­mein­schaft in­dus­trieller Forschungvere­ini­gun­gen e.V. (AiF) (As­so­ci­a­tion of In­dus­tri­al Re­search Or­gan­i­sa­tions) for fund­ing the pro­ject AiF 14374 N through a fi­nan­cial sup­port by the Fed­er­al Min­istry of Eco­nom­ic Af­fairs.

 

The re­search re­port is avail­able on re­quest from FRT.

The IGF-pro­ject AiF 14374 N of the re­search as­so­ci­a­tions Europäische Forschungs­ge­mein­schaft Reini­gungs- und Hy­gien­etech­nolo­gie e.V., Cam­pus Ficht­en­hain 11, 47807 Krefeld, was sup­port­ed via the AiF with­in the fund­ing pro­gram „In­dus­trielle Gemein­schafts­forschung und -en­twick­lung (IGF)“ by the Fed­er­al Min­istry of Eco­nom­ic Af­fairs and En­er­gy (BMWi) due to a de­ci­sion of the Ger­man Par­lia­ment.