US 10,472,762 B2Granted

Method for incorporating ultraviolet radiation protection and antimicrobial protection into rayon

AssigneeThe Sweet Living Group, LLC

InventorsRobert B Kramer, Ronald Kramer, Nicholas Marshall, Peter Hauser, Jason Rosenberg

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Abstract

A method for incorporating ultraviolet radiation protection and antimicrobial protection into rayon is disclosed which has the steps of providing pulp to form cellulose sheets, steeping the cellulose sheets, pressing the cellulose sheets, shredding the cellulose sheets into white crumb, aging the white crumb to form yellow crumb, xanthation of the yellow crumb, dissolving the yellow crumb to form a viscose, adding an additive to the viscose, ripening the viscose, filtering the viscose, degassing the viscose, spinning the viscose to form a fine filament of rayon, drawing the rayon, washing the rayon, and cutting the rayon.

Claims16

Dependent claims

A method for incorporating ultraviolet radiation protection and antimicrobial protection into rayon, the method comprising the steps of:

providing pulp to form cellulose sheets;
steeping the cellulose sheets;
pressing the cellulose sheets;
shredding the cellulose sheets into white crumb;
aging the white crumb to form yellow crumb;
xanthation of the yellow crumb;
dissolving the yellow crumb to form a viscose;
preparing an additive, which comprises a quantity of prepared zinc oxide particles modified with a layer of a reactive group that forms a bond with the quantity of rayon with the quantity of prepared zinc oxide particles, by suspending a quantity of zinc oxide particles in a solution of 98% ethyl alcohol, suspending a quantity of benzophenone silane linker in the solution of zinc oxide particles and 98% ethyl alcohol, adjusting the pH of the solution of zinc oxide particles, 98% ethyl alcohol and benzophenone silane linker to a pH of 12, placing the pH adjusted solution of zinc oxide particles, 98% ethyl alcohol and benzophenone silane linker into a centrifuge, recovering the centrifuged prepared zinc oxide particles after a period of time and drying the recovered prepared zinc oxide particle for a period of time;
adding said additive to the viscose;
ripening the viscose;
filtering the viscose;
degassing the viscose;
spinning the viscose to form a filament of rayon;
drawing the rayon;
washing the rayon;
and
cutting the rayon.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/267,946Filed 5 Feb 2019 · continuation in part
Priority: 11 Oct 2011
Published: US 2019/0242054 A18 Aug 2019
Granted: 12 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

D06M 11/44
With oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond: oxides or hydroxides of elements…
C11D 3/1213
Water-insoluble compounds: oxides or hydroxides, e.g. Al2O3, TiO2, CaO or Ca2
C11D 3/37
Organic compounds: polymers
C11D 17/0039
Detergent materials or soaps characterised by their shape or physical properties: coated compositions or coated components in the compositions,…

Family

Application13/317,152Parent of this continuation-in-part · filed 11 Oct 2011
Application13/632,223Parent of this continuation · filed 1 Oct 2012
Application14/245,152Parent of this continuation · filed 4 Apr 2014
Application14/833,317Parent of this continuation-in-part · filed 24 Aug 2015
Application15/064,242Parent of this continuation · filed 8 Mar 2016
Application15/951,834Parent of this continuation-in-part · filed 12 Apr 2018
Application16/180,776Parent of this continuation-in-part · filed 5 Nov 2018
US 2019/0242054 A1Pre-grant publication · published 8 Aug 2019
Application15/951,834Parent of this continuation
US 9,404,214 B2Parent of this continuation-in-part
Application15/064,242Parent of this continuation-in-part
US 9,150,824 B2Parent of this continuation
Application14/833,317Parent of this continuation
US 8,690,964 B2Parent of this continuation
US 8,277,518 B1Parent of this continuation-in-part
Application13/632,223Parent of this continuation-in-part
US 10,494,528 B2Related patent
US 10,907,048 B2Related patent
US 2013/0086753 A1Published application
US 2014/0342970 A1Published application
US 2016/0046891 A1Published application
US 2017/0260395 A1Published application
US 2018/0244926 A1Published application
US 2019/0315968 A1Published application
US 10,472,762 B2This patent

From the US filing history. Foreign family members aren’t listed.