Bleaching and dyeing; fluid treatment and chemical modification – Bleaching – Chemical
Patent
1974-11-08
1977-06-28
Schofer, Joseph L.
Bleaching and dyeing; fluid treatment and chemical modification
Bleaching
Chemical
8 16, 8101, 8154, 81551, 68189, D06L 302, D06L 304
Patent
active
040322920
ABSTRACT:
The disclosure relates to a high speed process for bleaching greige cloth. The system involves bleaching of the cloth in roll form, in multiple roll batches, utilizing a forced circulation of high temperature liquid bleach at superatmospheric pressures. In the preferred system, a rack, containing a plurality of rolls of greige cloth, is loaded into a pressure vessel. The rack includes means for connecting the several rolls of cloth individually to separate pumps and heat exchangers. Bleaching liquid is pumped through heat exchangers, heated to a high temperature, and thus forced through the rolls. A preferred bleaching material is hydrogen peroxide, but other conventionally used liquid bleaches may also be used in the process. Although the bleach material is introduced into the cloth at a substantially elevated temperature, it is kept from vaporizing by maintaining the bleaching vessel under superatmospheric pressure.
To greatest advantage, a single pressure vessel is utilized, in conjunction with appropriate solution storage vessels, pumps, and valves, to carry out the various related operations associated with the bleaching step, including preliminary impregnation with wetting-out solution, the addition of optical dyes, if desired, washing, the addition of softening solutions and other finishing agents, etc. The invention also contemplates drying of the bleached cloth while it remains in the roll form and still contained in the bleaching vessel, by means of electromagnetic energy.
The new system enables extraordinary reductions in bleaching time to be realized, and also greatly simplifies the related processing. Important savings are realized in equipment and in personnel, as well as in processing time.
REFERENCES:
patent: 1331743 (1920-02-01), Dudley
patent: 1733147 (1929-10-01), Brown et al.
patent: 2087308 (1937-07-01), Stienen
patent: 2350191 (1944-05-01), Raymond
patent: 3145555 (1964-08-01), Krantz
patent: 3413080 (1968-11-01), Schlagenhof et al.
patent: 3967923 (1976-07-01), Ameling
Clingman A. L.
Cluett Peabody & Co., Inc.
Schofer Joseph L.
LandOfFree
Method and apparatus for bleaching and related processing of gre does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for bleaching and related processing of gre, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for bleaching and related processing of gre will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1518837