Transcript Properties of Wound Care Products made with Cotton Nonwovens

Properties of Wound Care Products
made with Cotton Nonwovens
Laurence Chan, Ph.D.
(Strata America)
J. Q. Li (Winner Medical)
(Jan. 11, 2008)
1
Scope
 Traditional Wound Care Products
 Existing base materials
 Properties
 Launching of Cotton Nonwovens
 Ideal base material
 Properties
 Cotton Nonwoven Wound Care Products
 Characteristics
 Comparisons with traditional products
 Conclusions
2
Traditional Wound Care Products
 Dressing sponges
 X-ray detectable sponges
 Laporatomy sponges
 OR towel
 IV sponges
 General purpose sponges
 Burn dressings
3
4
Plain Gauze Sponge
5
X-Ray Detectable Sponge
Lap Sponge
6
7
Lap Sponge
8
OR Towel
9
Nonwoven Sponge
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IV Drain Sponge
Traditional Base Materials
 Woven Gauze
 Type VII USP gauze Structure
 32’s/19x9
 40’s/20x12
 Others
 Non USP gauze
 32’s/17x7
 Others
 Synthetic Nonwovens
 70/30 Rayon/PET
 50/50 Rayon/PET
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USP Gauze Testing
 Weight
 Thread Count
 Acidity
 Surface-active substance
 Starch and dextrin
 Water-soluble substance
 Ignite residue
 Absorption capacity
 Residue of ignition
 Fluorescence
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Other Requirements for Base Materials
 Appearance
 Hand (feel)
 Absorption
 Capacity
 Speed (sink time)
 Debridement and wound treatment
 Lint and loose thread
 Tensile properties
 Foreign particles
 Bioburden level
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Applications
 Woven Gauze
 Dressing Sponge
 General purpose sponge
 Trach sponge
 X-ray detectable sponge
 Laporatomy sponge
 OR Towel
 IV sponge
 Synthetic Nonwoven
 Dressing Sponge
 General purpose sponge
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 IV sponge
Physical Data for Gauze and Nonwoven Sponges
(A) Gauze Sponge, 4"x4": 32's/19x9
Ply
8
12
16
Sink Time Absorption
Wt. , gm seconds gm/sponge
1.44
1.0
15
2.18
1.0
20
2.80
1.0
23
Tensile MD, Tensile CD,
N/5cm
N/5cm
50
26
56
27
58
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(B) Nonwoven Sponge 70Rayon/30PET, 4"x4", 4 Ply:
GSM
30
40
15
Sink Time Absorption
Wt. , gm seconds gm/sponge
1.32
1.0
16
1.60
1.0
19
Tensile MD, Tensile CD,
N/5cm
N/5cm
31
23
41
26
Gauze Sponge Weight vs. Ply
.
3
Sponge Wt. (gm)
2.5
2
1.5
1
0.5
0
0
2
4
6
8
10
No. of Ply
16
12
14
16
18
.
Absorption vs. Sponge Wt.
Absorption (gm/sponge)
25
20
15
10
5
0
0
0.5
1
1.5
Sponge Wt. (gm)
17
2
2.5
3
Woven Gauze Characteristics
 Favorable
 Highly Absorbent
 Good for debridement
 Autoclavable
 Predictable properties
 Large volume of historical data
 Unfavorable
 Lint
 Loose thread
 Increasingly high cost
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Synthetic Nonwovens Characteristics
 Favorable
 Highly Absorbent
 Economical
 No lint
 No loose thread
 Unfavorable
 Not suitable for wound debridement
 Increasingly high cost of Rayon
 Not autoclavable
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Ideal Base Material for Wound Care Products
 Combining the favorable characteristics of
cotton and nonwoven materials:
 Absorbent
 Natural cotton feel
 Good for debridement
 Autoclavable
 Economical and stable pricing
 No lint
 No loose thread
 Environmental friendly
 Low bioburden level and Pyronema free
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Introducing PurCotton™ Nonwoven Cotton
 Launched in 2006 by Winner Medical Group.
 Proprietary and patented spunlace process.
 Manufactured in ultra modern facility in
Huanggang, China
 Made with USA grown cotton.
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Capabilities of PurCotton™ Nonwovens
 Basis Weight: 30 gsm to 120 gsm
 Plain or Apertured
 White or Colored
 100% Cotton or Cotton/PET Blend
 Competitive pricing
 Comparable to gauze products
 More affordable than other cotton nonwovens
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Wound Care Applications for PurCotton™
 Plain Dressing Sponge
 X-ray Detectable Sponge
 IV Sponge
 Dental Sponge
 Laporatomy Sponge
 OR Towel
 Others
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25
PurCotton Dressing Sponge
Aperture 1
26
27
Aperture 2
28
PurCotton X-ray Detectable Sponge
PurCotton X-ray Sponge (Sterile)
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30
PurCotton Lap Sponge
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PurCotton OR Towel
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Cotton Nonwoven: OR Towel and Lap Sponge
Typical PurCotton™ Physical Data: 4"x4", 4 Ply Sponge
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GSM
Wt.,
gm
Sink Time, Absorption, Tensile MD, Tensile CD,
seconds gm/sponge
N/5cm
N/5cm
30
1.2
1.3
16
28
22
40
1.7
1.4
18
36
30
60
2.5
2.0
25
50
50
80
3.3
1.6
26
71
67
110
4.5
1.8
23
98
96
120
5.0
2.0
22
172
124
PurCotton Sponge Wt.
.
6
Sponge Wt. (gm)
5
4
3
4"x4", 4 Ply
2
1
0
0
20
40
60
80
GSM
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100
120
140
Tensile Strength (N/m2)
.
Tensile Strength vs. Basis Wt.
200
180
160
140
120
100
80
60
40
20
0
MD
CD
0
50
100
Basis Wt. (gsm)
35
150
Sink Time (seconds)
.
Sink Time vs. GSM
2.5
2
1.5
1
0.5
0
0
20
40
60
80
GSM
36
100
120
140
Gram Water/Sponge
.
Absorption Capacity vs. GSM
30
25
20
15
10
5
0
0
20
40
60
80
GSM
37
100
120
140
Physical Properties: PurCotton™ vs. Gauze Sponge
(A) PurCotton Sponge, 4"x4", 4 Ply
GSM
Sink Time, Absorption, Tensile MD, Tensile CD,
Wt. , gm seconds gm/sponge
N/5cm
N/5cm
30
1.2
1.3
16
28
22
40
1.7
1.4
18
36
30
60
2.5
2.0
25
50
50
(A) Gauze Sponge, 4"x4": 32's/19x9
Ply
38
Sink Time, Absorption, Tensile MD, Tensile CD,
Wt. , gm seconds gm/sponge
N/5cm
N/5cm
8
1.44
1.0
15
50
26
12
2.18
1.0
20
56
27
16
2.80
1.0
23
58
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Physical Properties Summary
for PurCotton™
 A wide range of properties
 Basis weight
 Absorption capacity
 Tensile properties
 Aperture
 White or color
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Superior Characteristics of
PurCotton™ over Gauze Sponge
 Low Lint and no loose thread
 Better for wound debridement
 Very low bioburden level
 Pyronema free
 High bleaching temperature and long
duration
 USA grown cotton
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Nonwoven Cotton/PET Blend
 Launched in 2007
 More economical than PurCotton (100%
Cotton nonwoven)
 Marketing need for an alternative to
Rayon/PET blend:
 Rapidly increasing prices for Rayon
 More eco-friendly material
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Nonwoven Cotton/PET Blend
 Cotton/PET Blend
 70/30
 50/50
 Aperture
 24x20
 20x10
 Typical Basis Weight
 30 gsm
 40 gsm
 50 gsm
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Physical Properties: 70/30 Cotton/PET vs. Rayon/PET
(A) Cotton/PET Sponge 70/30, 4"x4", 4 Ply:
GSM
Wt.
Sink Time Absorption
30
1.24
1.6
40
1.65
1.6
Tensile MD
Tensile CD
16
31
21
20
39
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(B) Rayon/PET Sponge 70/30, 4"x4", 4 Ply:
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GSM
Wt.
Sink Time Absorption
30
1.32
1.0
40
1.60
1.0
Tensile MD
Tensile CD
16
31
23
19
41
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Superior Characteristics of
Cotton/PET over Rayon/PET
 More economical and longer term pricing
stability
 Autoclavable
 Better hand feel
 More favorable perception of Cotton by
end-users
 More eco-friendly than Rayon
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Wound Care Applications for Cotton/PET Blend
 General Purpose Sponge
 IV Sponge
 Dental Sponge
 Plain Dressing Sponge
 Others
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Conclusions
 Revolutionary spunlace nonwoven for
making wound care products:
 100% Cotton Nonwovens (PurCotton™)
 Cotton/PET Blends
 PurCotton™ 100% Cotton Nonwoven
 Ideal material combining best characteristics
of cotton and nonwoven
 Wide range of properties for making various
wound care products
 Nonwoven Cotton/PET Blend
 Longer term pricing stability over Rayon/PET
 Superior properties and more eco-friendly
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