Trends in Disposable Diaper Design

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Trends in Disposable Diaper Design Powered By Docstoc
					Trends	
  in	
  Disposable	
  Diaper	
  Design	
  
By	
  Carlos	
  Richer	
  	
  	
  Publisher:	
  Nonwovens	
  Industry	
  Magazine,	
  December	
  2010	
  

Few	
   products	
   evolve	
   as	
   quickly	
   as	
   disposable	
   diapers,	
   especially	
   in	
   mature	
  
markets	
   like	
   the	
   United	
   States,	
   Western	
   Europe,	
   or	
   Japan,	
   where	
   diapers	
   are	
  
extremely	
   competitive.	
   The	
   same	
   trends,	
   after	
   some	
   time	
   lag,	
   will	
   reach	
   all	
   the	
  
developing	
  markets	
  of	
  the	
  world.	
  	
  Here	
  is	
  an	
  attempt	
  to	
  list	
  some	
  of	
  the	
  changes	
  
in	
  product	
  design.	
  

The	
  New	
  Absorbent	
  Core	
  Design	
  and	
  my	
  personal	
  theory	
  of	
  the	
  Tripod:	
  	
  
I	
   am	
   a	
   fan	
   for	
   mathematical	
   modeling;	
   however	
   the	
   tripod	
   is	
   the	
   best	
   analogy	
  
that	
   I	
   have	
   found	
   to	
   explain	
   in	
   a	
   simple	
   way	
   how	
   diaper	
   core	
   performance	
   really	
  
works.	
  	
  Others	
  may	
  claim	
  there	
  are	
  many	
  more	
  properties	
  to	
  consider,	
  and	
  I	
  also	
  
agree;	
   however	
   I	
   believe	
   the	
   tripod	
   incorporates	
   the	
   most	
   important.	
   The	
  
absorbent	
   core	
   performance	
   in	
   a	
   modern	
   diaper	
   is	
   based	
   on	
   a	
   tripod;	
   it	
   is	
  
supported	
   by	
   3	
   key	
   diaper	
   design	
   properties.	
   The	
   3	
   key	
   properties	
   (each	
   one	
  
represent	
  a	
  leg	
  of	
  the	
  tripod)	
  are:	
  Retentive	
  Capacity,	
  Rewets	
  and	
  Strike	
  Through	
  
time.	
  	
  	
  The	
  same	
  way	
  a	
  camera	
  or	
  a	
  telescope	
  will	
  fall	
  if	
  the	
  legs	
  are	
  not	
  firmly	
  
adjusted,	
   diaper	
   performance	
   will	
   also	
   suffer	
   if	
   these	
   three	
   properties	
   are	
   not	
  
correctly	
  balanced;	
  a	
  defective	
  or	
  less	
  than	
  perfect	
  product	
  will	
  be	
  the	
  result.	
  	
  A	
  
typical	
   error	
   is	
   to	
   exceed	
   one	
   leg	
   (even	
   at	
   the	
   expense	
   of	
   an	
   excessive	
   cost)	
  
without	
   adjusting	
   the	
   other	
   two	
   legs	
   accordingly.	
   	
   Balancing	
   is	
   an	
   art	
   learned	
  
after	
   many	
   years	
   of	
   diaper	
   testing	
   experience,	
   not	
   just	
   the	
   learning	
   you	
   may	
  
acquire	
   in	
   a	
   simple	
   laboratory	
   environment,	
   but	
   also	
   the	
   learning	
   you	
   get	
   from	
  
the	
  analysis	
  of	
  the	
  recovered	
  diapers	
   from	
   the	
   field	
   and	
   the	
   feedback	
   from	
   infant	
  
test	
   centers.	
   Having	
   experienced	
   the	
   unique	
   opportunity	
   to	
   test	
   many	
   diaper	
  
designs	
   from	
   all	
   over	
   the	
   world	
   has	
   given	
   me	
   a	
   chance	
   to	
   better	
   understand	
   how	
  
it	
  all	
  works.	
  	
  




	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
  	
                                           	
  
                                                                                                                                                                           The	
  Diaper	
  Core	
  Tripod	
  
First	
  leg	
  of	
  the	
  tripod:	
  Retentive	
  Capacity	
  
Total	
  absorbent	
  capacity,	
  which	
  results	
  by	
  measuring	
  the	
  total	
  amount	
  of	
  urine	
  
that	
   can	
   be	
   absorbed	
   by	
   a	
   diaper	
   after	
   immersing	
   it	
   in	
   urine	
   for	
   a	
   fixed	
   time,	
   and	
  
then	
  allowing	
  it	
  to	
  drip	
  (also	
  referred	
  to	
  as	
  free	
  swell	
  capacity),	
  is	
  no	
  longer	
  an	
  
important	
  diaper	
  performance	
  variable;	
  at	
  least	
  not	
  as	
  it	
  used	
  to	
  be	
  in	
  the	
  past.	
  	
  
In	
   fact,	
   in	
   my	
   opinion,	
   total	
   absorbent	
   capacity	
   today	
   is	
   meaningless!	
   	
   Why?	
   	
   It	
  
can	
  mislead	
  you.	
  	
  The	
  amount	
  of	
  urine	
  a	
  diaper	
  can	
  absorb	
  is	
  of	
  little	
  value	
  to	
  us	
  
if	
  not	
  capable	
  of	
  retaining	
  the	
  urine	
  under	
  pressure.	
  	
  Total	
  absorbent	
  capacity	
  is	
  
not	
  one	
  of	
  the	
  legs	
  of	
  the	
  tripod.	
  	
  Instead,	
  the	
  centrifugal	
  capacity,	
  also	
  referred	
  
here	
  as	
  the	
  “retentive	
  capacity”,	
  has	
  taken	
  this	
  key	
  role.	
  	
  The	
  retentive	
  capacity	
  
represents	
   the	
   maximum	
   amount	
   of	
   urine	
   that	
   a	
   diaper	
   will	
   hold	
   under	
   the	
  
normal	
   pressures	
   of	
   the	
   users,	
   like	
   during	
   the	
   every	
   day	
   use	
   of	
   a	
   diaper	
   by	
   a	
  
baby.	
  	
  It	
  is	
  a	
  function	
  not	
  only	
  of	
  how	
  well	
  the	
  liquid	
  is	
  retained	
  under	
  pressure,	
  
but	
  also	
  of	
  how	
  well	
  the	
  diaper	
  is	
  utilized	
  so	
  there	
  are	
  no	
  wasted	
  resources.	
  Some	
  
of	
  the	
  best	
  diapers	
  that	
  I	
  have	
  tested	
  have	
  a	
  retentive	
  capacity	
  around	
  270	
  ml	
  for	
  
a	
  medium	
  size	
  baby	
  diaper	
  (at	
  around	
  5	
  KPa	
  of	
  equivalent	
  pressure),	
  exceeding	
  
this	
   value,	
   even	
   when	
   it	
   is	
   possible	
   and	
   many	
   brands	
   often	
   do,	
   brings	
   little	
  
advantage	
  to	
  consumers.	
  
	
  

The	
  second	
  leg:	
  The	
  Rewet	
  
The	
  second	
  leg	
  of	
  the	
  tripod	
  is	
  the	
  rewet.	
  It	
  represents	
  how	
  wet	
  the	
  surface	
  of	
  the	
  
diaper	
  is	
  when	
  it	
  is	
  subjected	
  to	
  a	
  pressure.	
  	
  Ideally,	
  it	
  is	
  supposed	
  to	
  be	
  totally	
  
dry.	
  	
  Several	
  tests	
  have	
  shown	
  that	
  the	
  actual	
  sensitivity	
  of	
  the	
  skin	
  of	
  an	
  average	
  
adult	
   human	
   to	
   detect	
   humidity	
   depends	
   on	
   the	
   temperature	
   of	
   the	
   fluid	
   and	
   the	
  
individual,	
  however	
  it’s	
  been	
  generally	
  accepted	
  that	
  it	
  starts	
  at	
  around	
  0.11	
  to	
  
0.13	
  ml	
  as	
  measured	
  by	
  the	
  typical	
  rewet	
  test	
  at	
  2.5	
  Kpa,	
  that	
  is	
  when	
  the	
  fluid	
  is	
  
applied	
  at	
  37	
  C.	
  	
  This	
  means	
  that	
  any	
  rewet	
  below	
  this	
  amount	
  will	
  not	
  even	
  be	
  
detected	
  by	
  the	
  user,	
  but	
  higher	
  rewet	
  numbers	
  will	
  increase	
  discomfort	
  to	
  the	
  
baby	
   or	
   the	
   adult	
   incontinent	
   user.	
   Many	
   times	
   babies	
   wake	
   up	
   at	
   night	
   not	
  
because	
   of	
   leakage	
   but	
   because	
   of	
   discomfort	
   from	
   the	
   wet	
   skin;	
   having	
   a	
   cold	
  
mass	
  of	
  cold	
  urine	
  near	
  the	
  body	
  is	
  quite	
  uncomfortable.	
  	
  Imagine	
  you	
  have	
  two	
  
diapers	
   with	
   the	
   same	
   identical	
   retentive	
   capacity	
   but	
   one	
   of	
   them	
   is	
   able	
   to	
  
show	
  a	
  much	
   drier	
  surface	
   than	
   the	
   other.	
   	
   Even	
   when	
   both	
   have	
   the	
   same	
   exact	
  
retention,	
  the	
  drier	
  diaper	
  will	
  be	
  regarded	
  as	
  the	
  better	
  product	
  and	
  users	
  will	
  
perceive	
  it	
  as	
  being	
  more	
  absorbent.	
  This	
  is	
  the	
  same	
  impression	
  the	
  mother	
  gets	
  
when	
  they	
  remove	
  the	
  morning	
  diaper	
  from	
  the	
  baby	
  and	
  notice	
  any	
  humidity	
  on	
  
the	
  skin,	
  even	
  when	
  both	
  diapers	
  did	
  not	
  leak.	
  	
  There	
  are	
  a	
  lot	
  of	
  false	
  myths	
  in	
  
the	
   industry	
   about	
   rewets.	
   The	
   first	
   one	
   is	
   to	
   incorrectly	
   extrapolate	
   the	
   rewet	
  
you	
   get	
   from	
   the	
   laboratory	
   to	
   the	
   rewet	
   from	
   an	
   actual	
   user.	
   	
   Lots	
   of	
   care	
   is	
  
taken	
   to	
   avoid	
   handling	
   of	
   the	
   diaper	
   before	
   it	
   gets	
   to	
   the	
   lab	
   to	
   measure	
   its	
  
rewet	
   when	
   in	
   fact	
   the	
   diaper	
   will	
   be	
   subjected	
   to	
   deformation	
   and	
   the	
   loss	
   of	
  
density	
  in	
  the	
  very	
  first	
  minutes	
  of	
  its	
  use	
  by	
  the	
  baby	
  or	
  the	
  adult.	
  	
  This	
  is	
  also	
  
quite	
   misleading.	
   	
   If	
   you	
   have	
   ever	
   tried	
   testing	
   a	
   diaper	
   after	
   a	
   baby	
   has	
   worn	
   it	
  
for	
   a	
   few	
   minutes,	
   you	
   will	
   understand	
   what	
   I	
   mean.	
   	
   Another	
   error	
   is	
   taking	
  
rewet	
   numbers	
   directly	
   without	
   considering	
   the	
   effect	
   they	
   have	
   on	
   human	
  
perception.	
  The	
  most	
  important	
  factors	
  affecting	
  rewet	
  are:	
  the	
  content	
  of	
  SAP	
  in	
  
the	
   mix;	
   the	
   properties	
   of	
   the	
   SAP	
   (like	
   AUL,	
   permeability,	
   etc);	
   the	
   relative	
  
position	
   of	
   the	
   SAP	
   in	
   the	
   mix;	
   the	
   GSM	
   and	
   quality	
   of	
   the	
   ADL	
   (acquisition	
  
distribution	
   layer)	
   used	
   to	
   separate	
   the	
   skin	
   from	
   the	
   wet	
   core;	
   and	
   the	
   three	
  
dimensionality	
   of	
   the	
   core	
   design	
   (the	
   ratio	
   between	
   pad	
   density	
   at	
   the	
   target	
  
zone	
   as	
   compared	
   to	
   the	
   back	
   that	
   will	
   be	
   discussed	
   later).	
   	
   I	
   have	
   proposed	
   a	
  
new	
   way	
   to	
   measure	
   rewets	
   based	
   on	
   a	
   maximum	
   value	
   of	
   50	
   points	
   using	
   a	
  
Logarithmic	
   equation	
   that	
   better	
   correlates	
   the	
   relationship	
   between	
   skin	
  
sensitivity	
  and	
  the	
  amount	
  of	
  liquid	
  measured	
  at	
  the	
  surface	
  (the	
  old	
  rewet).	
  	
  	
  

	
  




                                                                                                                                             	
  
	
  
The	
  third	
  leg:	
  The	
  Strike	
  Through	
  Time	
  
The	
  strike	
  through	
  time	
  represents	
  how	
  quickly	
  the	
  core	
  can	
  absorb	
  the	
  liquids.	
  	
  
If	
  it	
  is	
  too	
  slow,	
  there	
  is	
  an	
  increased	
  risk	
  for	
  leakage	
  even	
  when	
  the	
  diaper	
  has	
  
not	
  been	
  fully	
  utilized.	
  	
  The	
  better	
  the	
  containment	
  in	
  the	
  diaper,	
  such	
  as	
  in	
  well	
  
designed	
   gathers	
   and	
   liquid	
   impervious	
   leg	
   cuffs,	
   the	
   less	
   important	
   this	
   leg	
   of	
  
the	
  tripod	
  may	
  be,	
  and	
  you	
  may	
  be	
  able	
  to	
  afford	
  longer	
  times	
  without	
  a	
  decrease	
  
on	
   performance.	
   	
   More	
   than	
   half	
   of	
   the	
   brands	
   in	
   developing	
   markets	
   have	
   leg	
  
cuffs	
  that	
  do	
  not	
   really	
  work,	
  in	
  this	
  case	
  it	
  is	
  extremely	
  important	
  to	
  reduce	
  the	
  
time	
   of	
   liquid	
   acquisition.	
   	
   The	
   higher	
   the	
   concentration	
   of	
   SAP	
   in	
   the	
   mix	
   the	
  
slower	
  it	
  is	
  for	
  the	
  liquids	
  to	
  get	
  in.	
  Typically	
  the	
  thickness	
  of	
  the	
  ADL	
  resulting	
  in	
  
higher	
  GSM’s	
  has	
  to	
  be	
  increased	
  in	
  response	
  to	
  higher	
  concentrations	
  in	
  SAP.	
  If	
  
you	
  increase	
  the	
  amount	
  of	
  SAP	
  without	
  adjusting	
  the	
  ADL	
  you	
  end	
  up	
  with	
  an	
  
unbalanced	
   tripod.	
   	
   Many	
   core	
   designs	
   all	
   over	
   the	
   world	
   tried	
   to	
   clone	
   the	
  
previous	
   Pampers	
   design,	
   which	
   was	
   made	
   with	
   a	
   special	
   synthetic	
   curly	
   fiber	
   in	
  
combination	
  with	
  ADL.	
  Pampers	
  had	
  excellent	
  acquisition	
  times,	
  while	
  many	
  of	
  
the	
   clones	
   did	
   not.	
   For	
   this	
   reason	
   Pampers	
   was	
   able	
   to	
   get	
   away	
   with	
   open	
  
channels	
  at	
  the	
  end	
  of	
  the	
  leg	
  cuffs,	
  while	
  other	
  competitors	
  imitating	
  the	
  same	
  
open	
  channels	
  suffered	
  specially	
  with	
  night	
  leakage.	
  	
  The	
  trick	
  is	
  not	
  to	
  make	
  the	
  
most	
   expensive	
   diaper,	
   but	
   to	
   make	
   your	
   diaper	
   well	
   balanced	
   according	
   to	
   its	
  
particular	
  performance	
  and	
  market	
  segmentation,	
  to	
  optimize	
  its	
  performance.	
  

	
  
Putting	
  it	
  all	
  together	
  
A	
  good	
  way	
  to	
  look	
  at	
  diaper	
  core	
  performance	
  is	
  to	
  compare	
  the	
  accumulative	
  
values	
   of	
   the	
   three	
   legs	
   of	
   the	
   tripod	
   in	
   a	
   normalized	
   way.	
   I	
   propose	
   using	
   a	
  
system	
   of	
   points,	
   where	
   the	
   retentive	
   capacity	
   has	
   a	
   value	
   of	
   100	
   points;	
   each	
  
normalized	
  rewet	
  for	
  the	
  first	
  two	
  insults	
  has	
  a	
  value	
  of	
  50	
  points,	
  for	
  a	
  total	
  of	
  
100	
   points;	
   and	
   each	
   one	
   of	
   the	
   first	
   two	
   strike	
   through	
   has	
   a	
   value	
   of	
   25	
   points,	
  
for	
   a	
   total	
   of	
   50	
   points.	
   	
   The	
   reason	
   why	
   the	
   strike	
   through	
   has	
   a	
   lower	
   value	
  
than	
  the	
  other	
  two	
  legs	
  of	
  the	
  tripod	
  is	
  because	
  individually	
  it	
  is	
  less	
  important	
  
when	
  a	
  diaper	
  with	
  a	
  good	
  containment	
  (good	
  leg	
  cuff	
  barriers)	
  system	
  is	
  being	
  
used.	
  Here	
  an	
  example	
  of	
  core	
  performance	
  based	
  on	
  UK	
  diapers	
  purchased	
  last	
  
summer	
  as	
  it	
  was	
  obtained	
  using	
  my	
  methodology.	
  


                                   S.T	
  2	
         S.T.1	
             Rewet	
  2	
              Rewet	
  1	
               AUL	
  
   250%	
  


   200%	
                  21%	
  
                           20%	
                             14%	
                            19%	
  
                                                             15%	
                            21%	
                             13%	
  
   150%	
                  43%	
                                                                                                16%	
  
                                                             17%	
  
                                                                                              28%	
                             16%	
  
                                                             37%	
  
   100%	
                  47%	
                                                                                                50%	
  
                                                                                              50%	
  

       50%	
                                                 95%	
  
                           78%	
                                                              66%	
                             74%	
  

        0%	
  
                 Pampers	
  Ac0ve	
  Fit	
        Pampers	
  Simply	
  Dry	
           Baby	
  Super	
  Fit	
        Huggies	
  Natural	
  Fit	
  
                                                                                                                                                     	
  
	
  
New	
  3-­‐Dimensional	
  ratios	
  for	
  the	
  absorbent	
  core:	
  
During	
  the	
  90’s	
  and	
  early	
  2000’s	
  most	
  multinational	
  brands	
  were	
  designing	
  their	
  
absorbent	
  cores	
  with	
  an	
  ever-­‐increased	
  three	
  dimensional	
  pad	
  ratio,	
  which	
  made	
  
sure	
   the	
   target	
   zone	
   was	
   not	
   only	
   thicker	
   but	
   also	
   heavier	
   than	
   the	
   back	
   of	
   the	
  
diaper	
   to	
   optimize	
   retention	
   at	
   the	
   target	
   zone.	
   Something	
   happened	
   along	
   the	
  
way	
  so	
  that	
  this	
  trend	
  has	
  also	
  changed.	
  	
  The	
  whole	
  purpose	
  of	
  a	
  3D	
  diaper	
  is	
  to	
  
make	
   sure	
   the	
   core	
   is	
   better	
   utilized	
   when	
   the	
   diaper	
   is	
   discarded.	
   In	
   a	
   typical	
  
flat	
   diaper	
   (with	
   a	
   flat	
   core)	
   you	
   will	
   find	
   the	
   probability	
   of	
   leakage	
   is	
   much	
  
higher	
   near	
   the	
   stomach	
   than	
   in	
   the	
   back.	
   	
   This	
   is	
   the	
   reason	
   why	
   cores	
   have	
  
been	
  redesigned.	
  	
  In	
  the	
  past,	
  3D	
  ratios	
  of	
  as	
  much	
  as	
  75%	
  and	
  even	
  as	
  high	
  as	
  
150%,	
   were	
   not	
   uncommon.	
   	
   It	
   is	
   my	
   opinion	
   that	
   many	
   exceeded	
   the	
   need.	
  	
  
Today	
  most	
  modern	
  diapers	
  do	
  not	
  exceed	
  more	
  than	
  40	
  to	
  50%.	
  	
  The	
  key	
  design	
  
issue	
   for	
   3D	
   core	
   geometry	
   has	
   to	
   be	
   the	
   probability	
   of	
  leakage;	
   you	
   want	
   a	
   well-­‐
balanced	
   diaper	
   where	
   the	
   probability	
   of	
   leakage	
   for	
   the	
   front	
   and	
   back	
   is	
   the	
  
same.	
  	
  If	
  you	
  find	
  out	
  that	
  you	
  end	
  up	
  with	
  a	
  higher	
  probability	
  of	
  leakage	
  in	
  the	
  
back	
   than	
   in	
   the	
   front,	
   it	
   probably	
   means	
   you	
   exceeded	
   the	
   3D	
   requirement	
   in	
  
your	
  diaper	
  core.	
  	
  The	
  same	
  will	
  happen	
  if	
  you	
  use	
  a	
  much	
  higher	
  weight	
  ADL,	
  its	
  
use	
   will	
   help	
   reduce	
   the	
   need	
   of	
   a	
   very	
   high	
   3D	
   ratio.	
   	
   Some	
   diapers	
   today	
   use	
   as	
  
much	
   as	
   170	
   GSM	
   of	
   ADL,	
   like	
   in	
   the	
   Huggies	
   Pure	
   and	
   Natural.	
   Just	
   10	
   years	
   ago	
  
it	
  was	
  hard	
  to	
  find	
  anyone	
  using	
  more	
  than	
  40	
  GSM.	
  
	
  
New	
  trends	
  in	
  diaper	
  bag	
  packaging:	
  

Not	
   too	
   long	
   ago,	
   purchasing	
   a	
   diaper	
   bag	
   from	
   the	
   multinationals	
   meant	
  
obtaining	
  a	
  bag	
  so	
  tight	
  that	
  removing	
  a	
  diaper	
  resulted	
  in	
  the	
  total	
  destruction	
  
of	
  the	
  bag.	
  	
  The	
  reason	
  is	
  quite	
  simple;	
  packaging	
  and	
  freight	
  costs	
  may	
  represent	
  
as	
  much	
  as	
  9	
  to	
  11%	
  of	
  the	
  total	
  cost	
  of	
  the	
  product	
  when	
  a	
  cardboard	
  is	
  used,	
  
and	
   as	
   much	
   as	
   7	
   to	
   8%	
   when	
   not.	
   	
   If	
   you	
   wanted	
   to	
   save	
   money,	
   the	
   easy	
  
solution	
   was	
   to	
   increase	
   the	
   compression	
   force	
   during	
   packaging.	
   	
   This	
   is	
   no	
  
longer	
  the	
  case.	
  	
  After	
  2003,	
  most	
  diaper	
  manufacturers	
  have	
  reversed	
  the	
  trend;	
  
instead	
   of	
   increasing	
   the	
   bag	
   compression	
   with	
   hydraulic	
   pistons	
   at	
   high	
  
pressures,	
   today	
   they	
   prefer	
   to	
   reduce	
   the	
   thickness	
   of	
   the	
   diaper	
   altogether.	
  	
  
Compression	
   index	
   measures	
   the	
   height	
   of	
   the	
   stack	
   of	
   diapers	
   in	
   the	
   bag	
   and	
  
compares	
  it	
  against	
  the	
  height	
  of	
  the	
  same	
  stack	
  of	
  diapers	
  under	
  a	
  weight	
  of	
  1	
  
Kg.	
   	
   A	
   compression	
   of	
   0%	
   meant	
   it	
   was	
   the	
   same	
   height.	
   	
   In	
   the	
   near	
   past	
   we	
  
were	
  able	
  to	
  check	
  for	
  bags	
  with	
  compression	
  indexes	
  as	
  high	
  as	
  45%	
  or	
  more	
  
where	
  it	
  was	
  impossible	
  to	
  remove	
  the	
  diaper	
  from	
  the	
  bag.	
  	
  Today’s	
  trend	
  is	
  to	
  
limit	
   bag	
   compression	
   to	
   no	
   more	
   than	
   15%.	
   	
   If	
   you	
   see	
   it	
   from	
   a	
   historical	
   point	
  
of	
   view,	
   it	
   was	
   ridiculous	
   to	
   force	
   the	
   user	
   to	
   destroy	
   the	
   bag	
   just	
   to	
   get	
   the	
  
diaper	
  out,	
  but	
  it	
  happened,	
  believe	
  it	
  or	
  not!	
  	
  New	
  products	
  today	
  are	
  so	
  much	
  
thinner	
  because	
  they	
  do	
  not	
  use	
  any	
  pulp,	
  this	
  way	
  the	
  bag	
  does	
  not	
  need	
  to	
  be	
  
under	
  high	
  compression	
  in	
  order	
  to	
  reduce	
  its	
  volume.	
  
	
  
Thinner	
  and	
  narrow	
  is	
  better:	
  

Most	
   people	
   believed	
   diapers	
   in	
   the	
   USA	
   were	
   already	
   thin	
   enough.	
   	
   With	
   the	
  
launch	
   of	
   the	
   new	
   Pampers	
   Dry	
   Max	
   in	
   US	
   and	
   in	
   Europe	
   last	
   March	
   2010,	
   we	
  
have	
  seen	
  it	
  is	
  still	
  not	
  the	
  case.	
  	
  The	
  new	
  Pampers	
  received	
  plenty	
  of	
  criticism,	
  
but	
  after	
  8	
  months	
  of	
  being	
  in	
  the	
  market	
  it	
  seems	
  it	
  has	
  been	
  well	
  accepted	
  by	
  
now.	
   Recently,	
   Tesco’s	
   private	
   label	
   in	
   the	
   UK	
   has	
   followed	
   the	
   same	
   trend	
   as	
  
well	
   as	
   many	
   other	
   private	
   label	
   products	
   like	
   in	
   Spain	
   and	
   other	
   developed	
  
markets.	
   Thinner	
   products	
   are	
   not	
   as	
   well	
   accepted	
   in	
   developing	
   markets	
  
because	
   of	
   the	
   natural	
   cultural	
   tendency	
   to	
   disbelieve	
   that	
   they	
   will	
   hold	
   the	
  
same	
  liquid	
  as	
  thicker	
  products.	
  	
  Typically	
  this	
  is	
  confronted	
  with	
  education	
  and	
  
marketing	
  but	
  it	
  requires	
  a	
  large	
  investment	
  and	
  some	
  time	
  to	
  show	
  its	
  benefits.	
  	
  

	
  Diapers	
   are	
   not	
   only	
   getting	
   thinner,	
   they	
   are	
   also	
   getting	
   narrower.	
   	
   From	
   all	
  
diaper	
   trends	
   originated	
   in	
   developed	
   markets,	
   the	
   narrow	
   diaper	
   is	
   the	
   one	
  
facing	
  more	
  resistance	
  from	
  the	
  developing	
  markets.	
  	
  In	
  some	
  areas	
  it	
  will	
  take	
  
several	
  years	
  for	
  this	
  trend	
  to	
  arrive	
  and	
  be	
  fully	
  accepted.	
  	
  On	
  the	
  other	
  hand,	
  all	
  
markets	
   rich	
   and	
   poor	
   are	
   adopting	
   the	
   use	
   of	
   cloth-­‐like	
   back	
   sheets	
   and	
   printed	
  
back	
  sheet	
  designs	
  very	
  quickly.	
  
More	
  product	
  trends:	
  
In	
  addition	
  to	
  diaper	
  core	
  performance,	
  there	
  are	
  a	
  few	
  other	
  areas	
  to	
  be	
  aware	
  
of.	
   Craftsmanship	
   has	
   to	
   do	
   with	
   how	
   well	
   process	
   control	
   is	
   being	
   implemented	
  
during	
   the	
   manufacturing	
   of	
   the	
   products.	
   	
   The	
   trend	
   is	
   to	
   reduce	
   standard	
  
deviation	
   as	
   much	
   as	
   possible	
   in	
   order	
   to	
   reduce	
   costs.	
   The	
   most	
   important	
  
factor	
  to	
  control	
  is	
  the	
  standard	
  deviation	
  for	
  key	
  properties,	
  such	
  as	
  those	
  in	
  the	
  
tripod.	
  	
  You	
  will	
  not	
  survive	
  for	
  long	
  if	
  your	
  process	
  is	
  out	
  of	
  control.	
  	
  Some	
  ways	
  
to	
   measure	
   craftsmanship	
   is	
   to	
   look	
   at	
   the	
   core	
   symmetry	
   index;	
   the	
   standard	
  
deviation	
   for	
   the	
   retentive	
   capacity	
   (this	
   is	
   a	
   perfect	
   correlation	
   of	
   the	
   SAP	
  
variation	
   between	
   diaper	
   to	
   diaper);	
   the	
   standard	
   deviation	
   for	
   the	
  rewets	
   and	
  
the	
   strike	
   through	
   times.	
   	
   If	
   you	
   want	
   to	
   learn	
   more	
   about	
   the	
   diaper	
   industry	
  
you	
  can	
  join	
  my	
  Diaper	
  Industry	
  Network	
  at	
  LinkedIn	
  using	
  the	
  following	
  link:	
  	
  

http://www.disposablediaper.net/e/gis/136568	
  
	
  
	
  

	
  
	
  

				
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