Title of Invention

"A PROCESS FOR PRODUCING ABSORBENT CORES FROM TEXTILE WASTE".

Abstract This invention relates to a process for producing absorbent cores from textile waste comprising the steps of cutting the textile waste so as to increase the absorbency by capillary action, chemical treating the cut waste with a 1 to 8% mixture of alkali namely sodium hydroxide and sodium carbonate, washing the waste for removal of unreacted alkali mixture, drying at 60-100°C for 3 to 8 hours the treated and washed waste, forming the core from the waste of step (d) into a web in a known web forming machine.
Full Text DESRIPTION OF INVENTION
According to this invention there is provided a process for producing absorbent cores from textile waste comprising the steps of:-
a) cutting the textile waste so as to increase the absorbency by capillary action,
b) chemical treating the cut waste with a 1 to 8% mixture of alkali namely sodium hydroxide and sodium carbonate,
c) washing the waste for removal of unreacted alkali mixture,
d) drying at 60-100°C for 3 to 8 hours the treated and washed waste,
e) forming the core from the waste of step (d) into a web in a known web forming machine.
In accordance with this invention, the cut fibers are treated or soaked with a mixture of alkali in the range of 1 to 8%. The alkali mixture comprises preferably each of 50% of sodium hydroxide and 50% of sodium carbonate. Preferably, the fibers are treated with alkali mixture in the range of 2 to 4%. The chemical treatment is carried out with alkali mixture for a period of 10-30 minutes.
Prior to the chemical treatment, textile waste available in different lengths was cut into small size, for example, 3-30 mm to increase the absorbency by capillary action. Any suitable and known cutting machine may be used for this purpose.





WE CLAIM:
1. A process for producing absorbent cores from textile waste
comprising the steps of:-
a) cutting the textile waste so as to increase the absorbency by capillary action,
b) chemical treating the cut waste with a 1 to 8% mixture of alkali namely sodium hydroxide and sodium carbonate,
c) washing the waste for removal of unreacted alkali mixture,
d) drying at 60-100°C for 3 to 8 hours the treated and washed waste,
e) forming the core from the waste of step (d) into a web in a known web forming machine.
2. A process as claimed in claim 1 wherein the said chemical
treatment is carried out with alkali mixture preferably in the range
of 2 to 4%.
3. A process as claimed in claim 1 wherein the alkali mixture comprises 50% each of sodium hydroxide and sodium carbonate.

Documents:

597-DEL-2005-Abstract-(25-03-2011).pdf

597-DEL-2005-Claims-(07-06-2011).pdf

597-DEL-2005-Claims-(25-03-2011).pdf

597-DEL-2005-Correspondence Others-(07-06-2011).pdf

597-DEL-2005-Correspondence-Others-(25-03-2011).pdf

597-DEL-2005-Description (Complete)-(25-03-2011).pdf

597-DEL-2005-Form-1-(25-03-2011).pdf

597-DEL-2005-Form-3-(07-06-2011).pdf

597-DEL-2005-Petition-137-(07-06-2011).pdf


Patent Number 248884
Indian Patent Application Number 597/DEL/2005
PG Journal Number 36/2011
Publication Date 09-Sep-2011
Grant Date 05-Sep-2011
Date of Filing 18-Sep-2005
Name of Patentee SHRIRAM INSTITUTE OF INDUSTRIAL RESEARCH
Applicant Address 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
Inventors:
# Inventor's Name Inventor's Address
1 RAKESH KUMAR KHANDAL 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
2 AMITA MALIK 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
3 RAJINDER KUMAR DIWAN 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
4 VINAY KUMAR TYAGI 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
5 PRAVEEN KUMAR GOGIA 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
6 AMIT KUMAR 19, UNIVERSITY ROAD, DELHI-110 007, INDIA.
PCT International Classification Number A61L 15/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 NA