U.S. patent application number 11/665090 was filed with the patent office on 2009-01-22 for anti-perforation insole for footwear.
Invention is credited to Roberto Fenzi.
Application Number | 20090019727 11/665090 |
Document ID | / |
Family ID | 35519781 |
Filed Date | 2009-01-22 |
United States Patent
Application |
20090019727 |
Kind Code |
A1 |
Fenzi; Roberto |
January 22, 2009 |
Anti-perforation insole for footwear
Abstract
An anti-perforation insole (1) includes a multi-layer (10)
consisted of at least four layers of a fabric (12), with a
double-faced weft, made of high toughness polyester fibers coupled
together by a thermoplastic film or an adhesive resin; each of the
layers of fabric shows a surface treated by a coating (14) of
polyurethane and/or acrylic resin enriched with micronized,
ceramic: materials in form of silicates, for example of
aluminium.
Inventors: |
Fenzi; Roberto; (Vaiano,
IT) |
Correspondence
Address: |
PEARNE & GORDON LLP
1801 EAST 9TH STREET, SUITE 1200
CLEVELAND
OH
44114-3108
US
|
Family ID: |
35519781 |
Appl. No.: |
11/665090 |
Filed: |
October 11, 2005 |
PCT Filed: |
October 11, 2005 |
PCT NO: |
PCT/IB05/03228 |
371 Date: |
April 10, 2007 |
Current U.S.
Class: |
36/44 ;
36/43 |
Current CPC
Class: |
A43B 17/003 20130101;
B32B 27/12 20130101; A43B 13/12 20130101; B32B 2255/20 20130101;
A43B 7/32 20130101; B32B 2255/28 20130101; A43B 13/38 20130101;
B32B 5/26 20130101; B32B 2262/0276 20130101; B32B 2255/02 20130101;
A43B 13/10 20130101; B32B 5/024 20130101; B32B 2437/02 20130101;
B32B 2250/20 20130101; B32B 2264/107 20130101; B32B 2307/536
20130101; B32B 2255/26 20130101; B32B 2571/00 20130101 |
Class at
Publication: |
36/44 ;
36/43 |
International
Class: |
A43B 13/38 20060101
A43B013/38 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 14, 2004 |
IT |
PO2004A0005 |
Claims
1. Anti-perforation insole for footwears, characterized in that it
includes a multilayer consisted of at least four layers of fabric,
with a double-face weft, made of high toughness polyester fibers
coupled together through thermoplastic films or adhesive resins,
each of the layers of fabric showing a surface treated by smearing
of polyurethane and/or acrylic resin enriched with micronized
ceramic materials in form of silicates.
2. Insole according to claim 1, characterized in that said layers
of fabric are in a number of five.
3. Insole according to claim 1 or 2, characterized in that the
surface layer of said multilayer preferably shows the higher face,
intended for being faced inwardly the footwear, which is not
treated.
4. Insole according to one of the preceding claims, characterized
in that said fabric shows a heavy face with a heavy opposed spine
type wave and a face with a weave of the derived satin-type.
5. Insole according to one of the preceding claims, characterized
in that for said fabric, 1100 dtex polyester yarns, with a
toughness of 67,5-80 cN/dtex, in a number of 22.+-.2% per cm for
the warp and 29.+-.2% per cm for the weft are used.
6. Use of an anti-perforation insole, according to one of the
preceding claims, as a protective insert within insoles of
accident-prevention footwears.
7. Use of a perforation-resistant textile structure, according to
one of the claims 1 to 5, in the manufacturing of footwears wherein
the sole is directly executed on the upper by injection molding, as
an insole previously sewn to the upper of the footwear.
8. Insole according to one of the preceding claims, substantially
as above-mentioned and described, with reference to the enclosed
drawings.
Description
[0001] The present invention relates to an anti-perforation insole
for footwears and, in particular, an anti-perforation insole made
of a textile material especially suitable for the use in the
manufacturing of accident-prevention footwears with Strobel
technique. Anti-perforation insoles made of a textile material are
shown, among others, in U.S. Pat. No. 6,368,989 (relating to a
multilayer in exclusively aramidic fibers) and WO 00/41583
(relating to a multilayer including at least a layer with high
energy absorption ability in poly-nornbornene).
[0002] The same Applicant is the owner of the pending patent
applications for invention No. PO2003A000005 and PCT/IT/2004/000208
relating to multilayered textile structures resistant to the
perforation, wherein high toughness aramidic and non aramidic
fibers are used and the single layers show a surface ceramic
treatment.
[0003] Also ballistic protections are known, wherein multi-layered
textile structures are employed, which are however conceived in
order to resist to the violent impact of a bullet and not to the
penetration of nails (the EN 12568 regulation foresees that an
anti-perforation insole resists to a force of at least 1.100 N
exerted by a nail advanced at the speed of 10 mm/min..+-.3
mm/min.).
[0004] The aim of the present invention is to provide an
anti-perforation insole which is exclusively made in a non aramidic
textile material and which, also being resistant to the penetration
of a nail in accordance with the regulation in force, can be sewn
to the upper of a footwear manufactured with Strobel technique.
[0005] Said aim is attained with an insole including at least four,
and preferably five, layers of fabric with a double-face weft of
high toughness polyester fibers, wherein each layer shows a ceramic
surface treatment and the layers are coupled together through
thermoplastic films or adhesive resins.
[0006] In particular, the fabric shows a face with a weave of the
derived spine-type and a face with a weave of the derived
satin-type.
[0007] The surface ceramic treatment is carried out through
smearing with a polyurethane and/or acrylic resin enriched with
powders of hard and abrasive materials, preferably micronized
ceramic materials in form of silicates, for example of
aluminium.
[0008] Among the advantages obtained with an insole according to
the invention, there is the fact that the double-faced fabric
employed shows a high density of yarns (in particular of weft) and
a very compact structure. In particular, in view of the
superposition of the warp and weft yarns, the tip of a nail, not
finding openings between the yarns among which it can penetrate,
always meets the resistance of the yarn. The coating of
silicates-based poliurethane further determines the blocking
therebetween of the warp and weft yarns and the compacting of the
structure, by also contributing to the obstruction of the
interfibrous and intrafibrous interstices.
[0009] An insole according to the invention further shows the
advantage of being able to be used in the manufacturing of
accident-prevention footwears made with the Strobel technique.
[0010] These and further advantages of the invention will result
apparent, together with the technical features, from the following
detailed description of a non limiting example of embodiment.
[0011] In the drawings:
[0012] FIG. 1 diagramatically shows a sectional view of an insole
according to the invention;
[0013] FIG. 2 shows the interlock ratio of the fabric used for the
execution of the insole of FIG. 1;
[0014] FIG. 3 diagramatically shows the warp profile of the fabric
of FIG. 2;
[0015] FIG. 4 diagramatically shows the insole of FIG. 1 sewn to
the upper of an accident-prevention footwear manufactured with
Strobel technique.
[0016] Referring to the FIGS. 1-3, an anti-perforation insole 1
according to the invention includes a multi-layer 10 consisted of
at least four layers of a fabric 12, with a double-face weft, made
of high toughness polyester fibers, coupled together through a
thermoplastic film or an adhesive resin. Each of the fabric layers
shows a surface treated by means of a coating 14 (shown in FIG. 1
with enlarged thickness with respect to the reality) of
polyurethane and/or acrylic resin enriched with micronized ceramic
materials in form of silicates, for example of aluminium.
[0017] For a more effective protection, it is preferable to use
five layers of fabric 12 having the coating 14. The surface layer
of the multilayer 10 constituting the insole 1 preferably shows the
higher face (the one intended for being faced inwardly the
footwear) which is not treated for a better comfort of the user.
Advantageously, as it can be seen from FIG. 1, the used fabric
shows a face with a heavy opposed spine-type weave and a face with
a weave of the derived satin-type.
[0018] Surprisingly, it has been detected that by using the fabric
and the coating above described, it is possible to carry out an
exclusively textile effective structure, which resists to the
perforating action of a nail, only using high toughness
non-aramidic fibers, and therefore much more economic.
[0019] In particular, for an insole according to the invention, it
is advantageous to use 1100 dtex polyester yarns, with a toughness
of 67,5-80 cN/dtex, in a number of 22.+-.2% per cm. for the warp
and 29.+-.2% per cm. for the weft.
[0020] The used weaves allow to carry out fabrics with yarns very
close together, by making the structure of the same very bound for
being able to already afford, per se, a quite good resistance to
the penetration, still maintaining a high flexibility.
[0021] In particular, the composite weave used for the fabric in
polyester fibers has proved particularly effective in the execution
of the multilayer 10.
[0022] The coupling between the layers of fabric can occur by hot
calendering and by means of thermoplastic films (or adhesive
resins) interposed between the layers of the structure. The
finished insole shows a limited thickness (about 3 mm.) and an
adequate flexibility. The tests carried out shown, in fact, the
conformity of an insole (including 5 layers of fabric with a
surface ceramic treatment) in conformity of the invention to the
EN12568, ISO EN20344, ANSI Z41 and CSA regulations.
[0023] In FIG. 4 an insole 1 is shown, according to the invention,
sewn according to the Strobel technique to the upper 20 of an
accident-prevention footwear, equipped with a metal tip 22.
[0024] The invention thus conceived is susceptible of various
modifications and variations, all lying within the ambit of the
inventive concept. Furthermore, all the details can be replaced by
technically equivalent elements.
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