Biodegradable polymer non-woven absorbent pad with absorbency and antimicrobial chemistry

34 Pages·2014·5.22 MB·English

USOO8828516B2
(12) Unlted States Patent (10) Patent N0.: US 8,828,516 B2
Durdag et a]. (45) Date of Patent: Sep. 9, 2014
(54) BIODEGRADABLE POLYMER NON-WOVEN 6,866,859 B2 3/2005 Pastecki et a1.
ABSORBENT PAD WITH ABSORBENCY AND g; 1 allier?ont l
ANTIMICROBIAL CHEMISTRY 7,a 732,a 036 B2 6/2010 EtcCh eel lsS e a .
7,799,361 B2 9/2010 Etchells et al.
(75) Inventors: Kerem Durdag, Scarborough, ME (US); 2010/0285191 A1* 11/2010 1510116113 et al. ............. .. 426/415
Brian Pendleton; Newcastle, ME (US);
Robert Hamlyn; Newcastle, ME (U S); FOREIGN PATENT DOCUMENTS
Valerie Gunn; Cape Neddick; ME (US);
Marc Etchells; West Hampton; MA EP 0937743 A1 55/1999
(Us) OTHER PUBLICATIONS
(73) Assignee: BiOV?tiOIl II LLC, Boothbay, ME (Us) Simpson. Plastics Additives & Compounding. Sep./Oct. 2003. 3
. . . . . PageS~*
( * ) NOIlcei SUbJeCt to any (1150131111313 the term Ofthls Church, et al., “Modi?ed Atmosphere Packaging Technology: A
patent is extended or adjusted under 35 Review”, Journal Science Food Agriculture, 1995, vol. 67, pp. 143
U.S.C. 154(b) by 195 days. 152
Wilson, “Intelligent andActive Packaging for Fruits andVegetables”,
(21) Appl. No.: 13/463,363 CRC Press, 2007 PP 1'336~
Lopez-Rubio, et al., “Overview of Active Polymer-Based Packaging
(22) Filed: May 3 2012 Technologies for Food Applications”, Food Review International,
(Under’ 37 CPR 1 47) vol. 20, N0. 4, 2004 pp. 357-387.
Continued
(65) Prior Publication Data ( )
Us 2013/0295315 A1 Nov. 7, 2013 Primary Exam/"er T Anthony Weier
(74) Attorney, Agent, or Firm * Dennis R. HasZko
(51) Int. C1.
3253 27/04 (2006.01) (57) ABSTRACT
D04H 13/00 (2006-01) Included are food packaging materials and processes that are
D04H 1/ 74 (2006-01) useful for commercial products to extend the freshness and
(52) US Cl- preserve the integrity and shelf-life of packaged foods. Said
USPC ........... .. 428/76; 428/138; 442/123; 442/366; food packaging materials utilize a low bioburden; biodegrad
442/381; 442/414 able and/or compostable shock absorbing/cushioning non
(58) Field of Classi?cation Search woven structure and some form or forms of an antimicrobial
USPC ........... .. 428/76; 138; 442/414; 366; 123; 381 and/or antifungal agent consisting of silver or silver-based
See application ?le for complete search history. species that destroy microbes which would otherwise spoil
the food. The shelf-life extension process involves silver
(56) References Cited based antimicrobial agents that function to mitigate the
spread of food spoilage pathogens when they come in contact
US. PATENT DOCUMENTS with the said food packaging materials. Fluid absorbing or
superabsorbent; capabilities may be incorporated in the struc
5,444,113 A 8/1995 Sinclair et al.
6,270,873 B1 8/2001 Darnett ture to control excess ?uids.
6,808,791 B2* 10/2004 Curro et a1. ................. .. 428/198
6,835,678 B2 * 12/2004 Jackson et a1. .............. .. 442/154 25 Claims, 15 Drawing Sheets
Outer film food contact layer
SAP "captured" in the 1 Inner food pad insert
inner layer
Outer layers heat Inner layers calendared
together
sealed together
lnner food pad insert
Outer film food contact layer
Cross-sectional view ofthc Food pad structure
US 8,828,516 B2
Page 2
(56) References Cited Martin, et al.,“Poly(lactic acid): plasticization and properties of bio
degradable multiphase systems”, Polymer, vol. 42, Issue 14, Jun.
2001, pp. 6209-6219.
OTHER PUBLICATIONS Liu, et al., “Study of Effects of Processing Aids on Properties of
Poly(lactic acid)/Soy Protein Blends”, Journal of Polymers and the
Kenawy, et al., “The Chemistry and Applications of Antimicrobial Environment, vol. 19, No. l, 2011, pp. 239-247.
Polymers: A State-of-the-Ad Review”, Biomacromolecules, vol. 8, JackanicZ, et al., “Polylactic Acid as a Biodegradable Carrier for
Contraceptive Steroids”, Contraception, vol. 8, Issue 3, Sep. 1973,
No. 5, 2007, pp. 1359-1384.
pp. 227-234.
Martino, et al., “Processing and Mechanical Characterization of Plas Gao, et al., “Recent Advances in Antimicrobial Treatments of TeX
ticized Poly (lactide acid) Films for Food Packaging”, Proceeding of tiles”, Textile Research Journal, vol. 78., No. 60, 2008, pp. 60-72.
the 8th Polymers for Advanced Technologies International Sympo
sium, Budapest, Hungry, Sep. 13-16, 2005, pp. 1-3. * cited by examiner
US. Patent Sep. 9, 2014 Sheet 1 0f 15 US 8,828,516 B2
Polymer pellets
| Transfer line |
Extrusion die
Calendar station
Water and air quench
Windup station
Conve or belt la down
V V Vacuum pull
and collector
Schematic representation of a generic meltblown ?ber manufacturing line
Figure 1:
US. Patent Sep. 9, 2014 Sheet 2 0f 15 US 8,828,516 B2
Sunday
/ (engraved) roll
Non-woven
/ material
Spacer \
Driver roll
Figure 2
US. Patent Sep. 9, 2014 Sheet 3 0f 15 US 8,828,516 B2
Outer film food contact layer
SAP "captured" in the
_ lnner food pad insert
Inner layer
Inner layers calendared
Outer layers heat
sealed together 7 together
inner food pad insert
Outer ?lm food contact layer
Cross-sectional View of the food pad structure
Figure 3
US. Patent Sep. 9, 2014 Sheet 4 0f 15 US 8,828,516 B2
Aerobic ?anteria Recovered me {lontroi and Materiaés
CFU/ml giotted with Loga'arithmiz Y Scaie
1.858415
1954,34 888888888888888 8
E
’32 1 saws 8 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
E“
8a
‘E
i
g ZBEHJE
E
a
1 gay nygggj
Laiwo my 3 8 Day 4144544 44444444444444444444444444444444444 ,, . Qav vv2vvv9vvv vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv W
Figure 4
US. Patent Sep. 9, 2014 Sheet 5 0f 15 US 8,828,516 B2
Antimicrobial Ef?cacy of Absorbent Core using
E. coii #8739, plotted with logarithmic Y scale
1.000E-1L89
1.0mz+us ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ w
1.0005+Q7 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ W
1.000544%
AB(eaacrtuoebnriitca (CPU/ml}
muoama ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ w
wouawa ~
113005-83 "
1.9mm}; ~~~~~~~~~~~~~~~~~~~~~~ ~ I ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4/ v ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~
LOGOS-GI ‘
Starting Pop Untreated Modi?ed
3 Absarbent (1cm 3410§E+04 34933E+68 1‘733E+02
Figure 5
US. Patent Sep. 9, 2014 Sheet 6 0f 15 US 8,828,516 B2
An?micrubial Perumame 02’ Silverglnn Treated
Amenua‘ed ?lm
nmma
mamas
wwm
mama
2.8%832
Ta rget Esme.
Figure 6
US. Patent Sep. 9, 2014 Sheet 7 0f 15 US 8,828,516 B2
E. cnli CPU Reductian on Apertumd Fiim
(B24 minus 11!}, as 30g ?aunt)
{mwEhcaml:.gems i
LIQUEanlIIE
LWIIENIE
LEIGEMH
Taargm I3€am Lirg T385911" anr
Figua'e 7
US. Patent
Sep. 9, 2014 Sheet 8 0f 15 US 8,828,516 B2
E. mg; EFU Reduc?un 1m Aperture? Film
{Wild minus as $6)
Target Fins 1‘
gaductcm WEAR
Figurc 8