CA2111071C - Single step sterilization wrap system - Google Patents

Single step sterilization wrap system Download PDF

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Publication number
CA2111071C
CA2111071C CA002111071A CA2111071A CA2111071C CA 2111071 C CA2111071 C CA 2111071C CA 002111071 A CA002111071 A CA 002111071A CA 2111071 A CA2111071 A CA 2111071A CA 2111071 C CA2111071 C CA 2111071C
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CA
Canada
Prior art keywords
wrap
strength
sterilization
web laminate
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA002111071A
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French (fr)
Other versions
CA2111071E (en
CA2111071A1 (en
Inventor
Sonya Nicholson Bourne
Nelson Mcray
Lavada Campbell Boggs
William Ralph Neff
Charles John Morell
Marsha Lottie Vaughn
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Kimberly Clark Worldwide Inc
Original Assignee
Kimberly Clark Worldwide Inc
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Application filed by Kimberly Clark Worldwide Inc filed Critical Kimberly Clark Worldwide Inc
Publication of CA2111071A1 publication Critical patent/CA2111071A1/en
Application granted granted Critical
Publication of CA2111071C publication Critical patent/CA2111071C/en
Publication of CA2111071E publication Critical patent/CA2111071E/en
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Classifications

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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
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Abstract

Disclosed herein is a single step sterilization wrapping material suitable for use, as an example, in wrapping surgical instruments and supplies for sterilization, transportation and storage. The material includes separate inner and outer wraps which, unlike previous wraps, are joined to one another.
Common wrapping techniques involve wrapping items to be sterilized with two separate sheets of wrap. The present invention provides separate wraps which can be specially engineered to deliver specific properties for each sheet and then joined to one another so as to permit wrapping and opening in a neat single step process which increases efficiency and saves time and money. In special situations the outer wrap can be engineered with increased strength, the inner wrap with increased barrier properties and the inner and outer wraps can be made visually distinct from one another so that improper wrapping or opening is not a problem.

Claims (37)

1. A sterilization single step wrap system comprising:
an outer wrap made from a first sterilization sheet superposed on an inner wrap made from a second sterilization sheet, each sheet being independent of one another and joined to one another at one or more bond sites;
wherein said sterilization wrap system defines a central zone and a peripheral zone, said central zone having a greater number of bond sites per unit area than said peripheral zone;
further wherein said peripheral zone is surrounded by said central zone; and wherein said first sterilization sheet is formed from a first fibrous sheet, and said second sterilization sheet is formed from a second fibrous sheet.
2. The sterilization wrap system of claim 1, wherein said sterilization wrap system has a first exterior surface and a second exterior surface each defining a respective surface area and wherein said bond sites occupy no more than 50% of the surface area of either said first or second exterior surfaces of said sterilization wrap system.
3. The sterilization wrap system of claim 1 or 2, wherein said one or more bond sites comprise two continuous seams joining said outer wrap to said inner wrap.
4. The sterilization wrap system of any one of claims 1 to 3 , wherein said outer wrap and said inner wrap each have a grab tensile strength and the grab tensile strength of said outer wrap is greater than said inner wrap.
5. The sterilization wrap system of claim 4, wherein said inner wrap has a dry spore penetration rate which is lower than said outer wrap.
6. The sterilization wrap system of claim 5, wherein said inner wrap has a bacterial filtration efficiency which is greater than said outer wrap.
7. The sterilization wrap system of claim 5, wherein said inner wrap has a bacterial filtration efficiency which is less than said outer wrap.
8. The sterilization wrap system of claim 6, wherein said inner wrap has a peak energy and said outer wrap has a peak energy, said peak energy of said outer wrap being greater than said inner wrap.
9. The sterilization wrap system of any one of claims 1 to 8, wherein said inner and outer wraps are visually distinct from one another.
10. A sterilization single step wrap system comprising:
an outer wrap made from a strength barrier web laminate and an inner wrap made from a barrier web laminate, said strength barrier web laminate and said barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said strength barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and an intermediate barrier layer made from randomly deposited fibers, said fibers in said intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said intermediate barrier layer being disposed between and bonded to said first and second strength layers;
said barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers;
said outer wrap having a greater grab tensile strength than said inner wrap, said inner wrap having a dry spore penetration rate that is lower than said outer wrap and said inner wrap having a bacterial filtration efficiency which is greater than said outer wrap; and wherein said outer wrap and said inner wrap are joined about all or a portion of peripheries thereof.
11. A sterilization single step wrap system comprising:
an outer wrap made from a strength barrier web laminate and an inner wrap made from a barrier web laminate, said strength barrier web laminate and said barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said strength barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and an intermediate barrier layer made from randomly deposited fibers, said fibers in said intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said intermediate barrier layer being disposed between and bonded to said first and second strength layers;
said barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers;
said outer wrap having a greater grab tensile strength than said inner wrap, said inner wrap having a dry spore penetration rate that is lower than said outer wrap and said inner wrap having a bacterial filtration efficiency which is greater than said outer wrap; and wherein said outer wrap and said inner wrap are joined only about all or a portion of peripheries thereof.
12. The sterilization wrap system of claim 10 or 11, wherein said outer wrap and said inner wrap are joined to one another along the entire length of two generally parallel edges of said sterilization wrap.
13. The sterilization wrap system of claim 12, wherein said sterilization wrap system has a plurality of spaced-apart and separate bond points joining said outer wrap to said inner wrap of both of said two generally parallel edges of said sterilization wrap.
14. The sterilization wrap system of claim 13, wherein said outer wrap is visually distinguishable form said inner wrap.
15. The sterilization wrap system of any one of claims 1 to 14, wherein said bond sites comprise continuous bond lines.
16. The sterilization wrap system of any one of claims 1 to 15, wherein said bond sites comprise spaced apart and separate bond points.
17. The sterilization wrap system of any one of claims 1 to 16, wherein said outer wrap comprises a laminate having a spunbonded layer, a melt blown layer and a spunbonded layer.
18. A sterilization single step wrap system comprising:
an outer wrap made from a strength barrier web laminate and an inner wrap made from a barrier web laminate, said strength barrier web laminate and said barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said strength barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and an intermediate barrier layer made from randomly deposited fibers, said fibers in said intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said intermediate barrier layer being disposed between and bonded to said first and second strength layers;

said barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers;
said outer wrap having a greater grab tensile strength than said inner wrap, said inner wrap having a dry spore penetration rate that is lower than said outer wrap and said inner wrap having a bacterial filtration efficiency which is greater than said outer wrap; and wherein said bond sites comprise two crisscrossing bond lines which form a X-pattern across the wrap system.
19. A sterilization single step wrap system comprising:
an outer wrap made from a strength barrier web laminate and an inner wrap made from a barrier web laminate, said strength barrier web laminate and said barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said strength barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and an intermediate barrier layer made from randomly deposited fibers, said fibers in said intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said intermediate barrier layer being disposed between and bonded to said first and second strength layers;

said barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers;
said outer wrap having a greater grab tensile strength than said inner wrap, said inner wrap having a dry spore penetration rate that is lower than said outer wrap and said inner wrap having a bacterial filtration efficiency which is greater than said outer wrap; and wherein said bond sites comprise a series of parallel bonds which span at least a portion of a length or width of the system.
20. A sterilization single step wrap system comprising:
an outer wrap made from a strength barrier web laminate and an inner wrap made from a barrier web laminate, said strength barrier web laminate and said barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said strength barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and an intermediate barrier layer made from randomly deposited fibers, said fibers in said intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said intermediate barrier layer being disposed between and bonded to said first and second strength layers;
said barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers;
said outer wrap having a greater grab tensile strength than said inner wrap, said inner wrap having a dry spore penetration rate that is lower than said outer wrap and said inner wrap having a bacterial filtration efficiency which is greater than said outer wrap; and wherein said bond sites comprise a series of sinusoidal bonds.
21. The sterilization wrap system of any one of claims 1 to 20, wherein said inner wrap comprises a laminate having a spunbonded layer, a melt blown layer and a spunbonded layer.
22. A single step sterilization wrap system comprising:
an outer wrap made from a first barrier web laminate and an inner wrap made from a second barrier web laminate, said first barrier web laminate and said second barrier web laminate being placed adjacent to one another in generally face-to-face relationship, said laminates being joined to one another at one or more bond sites;
said first barrier web laminate comprising a first strength layer made from randomly deposited fibers, a second strength layer made from randomly deposited fibers, and a first intermediate barrier layer made from randomly deposited fibers, said fibers in said first intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter of the fibers in either of said first and second strength layers, said first intermediate barrier layer being disposed between and bonded to said first and second strength layers;
said second barrier web laminate comprising a third strength layer made from randomly deposited fibers, a fourth strength layer made from randomly deposited fibers, and a second intermediate barrier layer made from randomly deposited fibers, aid fibers in said second intermediate barrier layer having an average fiber diameter which is less than the average fiber diameter in either of said third and fourth strength layers, said second intermediate barrier layer being disposed between and bonded to said third and fourth strength layers; and wherein said outer wrap and said inner wrap are joined to one another along the entire length of the edges of said sterilization wrap.
23. The sterilization wrap system of claim 22, wherein said outer wrap and said inner wrap are joined to one another such that at least a pound tensile force is needed to separate said outer wrap from said inner wrap.
24. A sterilization wrap system having a periphery, the wrap comprising:
a first wrap sheet comprising a laminate having a spunbonded layer, a melt blown layer and a spunbonded layer;
and a second wrap sheet comprising a laminate having a spunbonded layer, a melt blown layer and a spunbonded layer;

wherein the sheets are joined at the periphery by a plurality of spaced apart and separate bond points; and further wherein each of the sheets has a basis weight of from about 0.5 to about 3.5 ounces per square yard.
25. The system of claim 24, wherein the system is adapted for use in steam sterilizing conditions.
26. The system of claim 24, wherein the system is adapted for use in ethylene oxide sterilizing conditions.
27. The system of any one of claims 24 to 26, wherein each wrap sheet is similarly sized.
28. The system of any one of claims 24 to 27, wherein the first wrap sheet is bonded to the second wrap sheet using bonding means comprising adhesive bonds.
29. The system of any one of claims 24 to 27, wherein the first wrap sheet is bonded to the second wrap sheet using bonding means comprising stitching bonds.
30. The system of any one of claims 24 to 27, wherein the first wrap sheet is bonded to the second wrap sheet using bonding means comprising heat bonds.
31. The system of any one of claims 24 to 27, wherein the first wrap sheet is bonded to the second wrap sheet using bonding means comprising ultrasonic bonds.
32. The system of claim 24, wherein the system defines a central portion having bonds therein and wherein the periphery of the system has a greater degree of bonding than the central portion.
33. The system of any one of claims 24 to 32, wherein the layers of at least one of the wrap sheets are bonded together by bonds which occupy from about 5 to about 50% of the surface area of the wrap sheet.
34. The system of claim 30, wherein the bonds occupy from about 10 to about 30% of the surface area of the wrap sheet.
35. The system of any one of claims 24 to 33, wherein a surface of the system defines first and second zones wherein there are a greater number of bond sites in the first zone than in the second zone.
36. The system of claim 31, wherein the first zone surrounds the second zone.
37. The sterilization wrap system of any one of claims 1 to 16, wherein said inner wrap comprises a laminate having a spunbonded layer, a meltblown layer and a spunbonded layer.
CA2111071A 1993-06-30 1993-12-09 Single step sterilization wrap system Expired - Lifetime CA2111071E (en)

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US6159423A (en) 2000-12-12
US5958337A (en) 1999-09-28
DE69431113D1 (en) 2002-09-05
EP1621154A2 (en) 2006-02-01
US5688476A (en) 1997-11-18
EP0707460A1 (en) 1996-04-24
WO1995001135A1 (en) 1995-01-12
MX9404664A (en) 1998-08-30
EP1621154B1 (en) 2009-04-01
EP1362557A1 (en) 2003-11-19
EP1621154A3 (en) 2007-01-24
DE69434602D1 (en) 2006-03-30
AU7312294A (en) 1995-01-24
CA2111071E (en) 2011-08-23
AU695238B2 (en) 1998-08-13
US5635134A (en) 1997-06-03
EP1362557B1 (en) 2006-01-04
DE69431113T2 (en) 2003-03-27
JPH08511970A (en) 1996-12-17
DE69435201D1 (en) 2009-05-14
DE69434602T2 (en) 2006-08-10
JP3713272B2 (en) 2005-11-09
EP1125558A2 (en) 2001-08-22
DE69433434D1 (en) 2004-01-29
DE69433434T2 (en) 2004-10-07
EP1125558B1 (en) 2003-12-17
JP2004250108A (en) 2004-09-09
ES2250801T3 (en) 2006-04-16
CA2111071A1 (en) 1994-12-31
EP0707460B1 (en) 2002-07-31
ES2180584T3 (en) 2003-02-16
EP1125558A3 (en) 2001-09-05
JP4081040B2 (en) 2008-04-23
ES2208493T3 (en) 2004-06-16

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