Compositions – Electrolytes for electrical devices
Patent
1990-10-23
1992-05-26
Clingman, A. Lionel
Compositions
Electrolytes for electrical devices
252 91, 252174, 206 05, 428224, 428298, 428375, C11P 1704
Patent
active
051165244
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a detergent product consisting of a water-insoluble, water-permeable bag containing a powder-form or granular detergent in the quantity necessary for a washing program.
Detergents preportioned in bags have been known for some time. They afford the advantage that the user does not have to measure off the quantity of detergent required for a washing program, the flow properties, particle size distribution and appearance of the detergent have to meet only minimal requirements, the user does not come into contact with the detergent and its potentially skin-irritating constituents and that the detergents accommodated in bags of water-insoluble materials are released to the liquor in dissolved or finely dispersed form so that there are none of the losses of detergent which occur when unpacked detergent is added in machines of the type which do not have a closed solution sump or in which the contents of the solution sump are not recirculated. However, if all the advantageous properties of detergents in portion bags are to be utilized, the properties of the bag have to meet various requirements. Thus, on the one hand, the bag has to be so dense that finely divided detergent constituents remain enclosed. On the other hand, however, the bag has to be so permeable to water that the detergent can be rapidly dissolved out or washed out by the washing water. The bag materials have to lend themselves to processing in typical filling and packaging machines, which above all presupposes weldability with permanently heated welding jaws. In addition, the bag materials must not be affected by the bag contents and should not be so expensive that they are not worth using. Since hitherto known detergent portion bags did not all have these necessary properties at one and the same time, detergent products of this type have never been able to command a place in the market.
Water-insoluble, water-permeable portion bags for particulate detergents are described, for example, in EP-A-11 968. The bags described therein are made of a material which consists at least partly of polypropylene fibers. However, the bag material may additionally contain cellulose fibers, polyester fibers, polyamide fibers or blends thereof. According to the teaching of the cited patent application, bag materials consisting solely of polypropylene fibers or at least substantially of polypropylene fibers are preferred. However, this material presents difficulties when it comes to making up into bags.
It has now been found that improved bag materials are eminently suitable for the described purpose.
Accordingly, the present invention relates to a detergent product containing a particulate detergent in a water-insoluble, water-permeable bag of a flat textile material of which the fibers consist of polypropylene and another organic polymeric material, the fibers consisting solely of sheathed bicomponent fibers of an inner core of polypropylene having a crystallinity determined by X-ray structure analysis of 40 to 60% which is sheathed with polyethylene having a crystallinity of 50 to 70%.
Bag materials which satisfy the above-mentioned requirements can be made from fibers such as these. Above all, the requirement for ready weldability in standard machines having permanently heated welding jaws is satisfied by materials of these so-called bicomponent fibers. It is thus possible to produce even sealed-edge bags (flat bags) which do not normally lend themselves to impulse welding.
Particularly valuable properties in this regard are exhibited by fibers in which the polypropylene component is larger than the polyethylene component, the ratio by weight between the two components being in particular from 3:2 to 9:1. Extremely fine fibers can be produced from such materials and, accordingly, can be made up into very compact, but highly water-permeable bag materials. Suitable fibers of this type have a denier of 0.7 to 3 dTex (dTex =weight in grams of a filament 10,000 meters in length).
A suitable material in regard to impermeability to dust but pe
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Boecker Monika
Carduck Franz-Josef
Jahnke Ulrich
Kuenzel Werner
Smulders Eduard
Clingman A. Lionel
Grandmaison Real J.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Swope Bradley A.
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