only for textile and chemicals

1. Antimicrobial and Blood Repellent Finish on
Surgical Gown
INTRODUCTION
Several dangerous, infectious and blood borne bacteria and viruses, such as
pseudomonas, candida, S.aureus and E.coli, are in attendance in hospital
locations which are conductive for increase of the microorganisms. The
textile materials such as socks and underwear faced with smell from
body perspiration. Currently there is also an interest in protecting health
care workers from diseases that might be carried out by patients. Especially
for surgical gowns, drapes, masks, sheets, and pillow cases, there is an
increasing need to care for medical staff from infection by blood borne
pathogens such as HIV and HBV.
Gowns should be able to avoid strikethrough or wetting out of the fabric,
and so surgical gown materials should have not only antimicrobial
properties but also blood barrier properties. In addition the textile used in
hotels, transportation and biological institution needs antimicrobial
textiles. Textile materials with good opposing to antibacterial attack and
cross infection by giving antibacterial and blood repellent finish.
PLAN OF WORK
3.1 Introduction:
Antimicrobial and blood repellant finish has been applied to cotton fabric
used for surgical gowns. In this project neem oil emulsion is formed by
using emulsifier and this is combinwill be the concentration of this
chemicals through the method using pad-dry-cure method is done and
further tasting of the antimicrobial and water repellant finish is done.
Textile goods are excellent substrate for growing microorganisms. For the
last fifty years, the prevention of microbial attack on textile materials has
become increasingly important to consumers and textile producers
ed to siloxane based water repellant finish (4%, 6%, and 8%) will be the
concentration of this chemicals through the method using pad-dry-cure
method is done and further tasting of the antimicrobial and water repellant
finish is done.

2. Textile goods are excellent substrate for growing microorganisms. For the
last fifty years, the prevention of microbial attack on textile materials has
become increasingly impDesizing
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Scouring
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Bleaching
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Dyeing
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Pattern making
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Finishing
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Stitching
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Surgical gown is formed
Material used:
100% cotton well sized fabric is taken for the study with particulars are as
per below mentioned table 3.1
: Fabric preparation
Sr.No. Fabric preparation parameters
1 Material 100% cotton sized fabric
2 Weave plain
3 GSM 120
4 Thickness 0.46cm
5 Yarn thickness 60S X 60s

3. 6 EPI 84
7 PPI 84
: Chemical used for study
Sr.No Name of Chemical Grade Purpose
1 Antimicrobial finish
2 Acetic acid
3 Water repellent finish
4 Eco friendly resin finish
5 Magnesium chloride
6 Emulsifier
: Machine used for study
Sr.No Name of machine Purpose
1 Padding mangle
2 Curing chamber
3 Weighing balance
Method
Desizing:
A well sized 100% cotton fabric is to be treated with room temperature in
cold water for 24 hrs. Followed cold wash. Further fabric is to be air dried
and checked for absorbency, weight loss and tensile strength.
: Desizing process
Sr.No. Material quantity
1 100% Cotton fabric 3 meter
2 Water 9.5 lit

4. 3 Temperature Room temp
Conventional scouring process:
Well desized 100% cotton fabric is to be treated with wetting agent, caustic
soda flakes and soda ash at 130oC for 3 hrs followed by hot wash at 90oC
for 10min. Cold wash and neutralizing with acetic acid as per recipe given
in table. Further the fabric is to be air dried and checked for absorbency
and tensile strength.
: Scouring process
Sr.No. Chemicals Quantity
1 Wetting agent (TRO) 0.5gL
2 Soda ash 1.0%OWF
3 Caustic flakes 4.0% OWF
4 Sequestering agent 1gL
5 Detergent 2%OWF
Conventional bleaching process:
With above process well scoured 100% cotton fabric is to be treated with
hydrogen peroxide (50%), soda ash and sodium silicate at 90oC for 3hrs as
per given recipe. Followed by hot wash at 90oC for 15 min. cold wash and
neutralizing with acetic acid. Further the fabrics is air dried.
: Bleaching process
Sr.No. Chemicals Quantity
1 Wetting agent 0.5gl
2 Soda ash 1.0%OWF
3 Caustic soda flakes 4.0%OWF
4 Sodium silicate 5.0gL
5 Hydrogen peroxide (50%) 3.0 vol.
Dyeing with reactive dye:

5.  Weigh exactly 1gm of sky blue dye powder add equal quantity of urea
and then paste it with little amount of cold water.
 Starr the paste with glass rod and make up the volume to 100ml by
dissolve hot water with use stirring to dissolve the dye completely.
 Set the dye bath with required of dye solution and warm water
keeping MLR 1:30
 The given hank at 60oC and continue dyeing for 15 to 20 min.
 Add 40 gpl common salt with interval of 10 min.
 After complete exhaustion of dye bath add 20 gpl soda ash for the
fixation of dye bath .add dyestuff and slowly increase the temp. to 25oC
 Continue dyeing and fixation, remove the hank wash and squeeze.
 Carry out soaping treatment.

: Dyeing process
Sr.No. Chemicals Concentration
1 Dye 2%
2 Salt 40gpl
3 Soda ash 20gpl
Finishing process:
 Prepare finishing solution as given bellow
 Combine finishing of antimicrobial and blood repellent finish
 Take a neem oil then add emulsifier in to that antimicrobial solution
 Then take siloxane based water repellant finish add acetic acid, eco-
friendly resin and magnesium chloride
 Mix the antimicrobial and blood repellant finish with different
concentration
 Padded the fabric with the above solutions
 Dry the fabric and fix through the stenter machine.
: Finishing process
Sr. No. Chemical /Parameter Particulars
1 Antimicrobial finish 35 ml
2 Acetic acid 5-8 ml
3 Water repellent finish 250 ml
4 Eco friendly resin finish 3-4 ml
5 Magnesium chloride 5 gm.

6. 6 Emulsifier 5 ml
7 Curing temperature 140oC
8 Water 2.2 lit.
Testing method:
Test method for assessing the antimicrobial finish:
In this work, the qualitative agar diffusion test and the quantitative
bacteria reduction through Hohenstein modified test ware used to access
the antimicrobial activity of the fabrics.
Agar diffusion method:
Treated and untreated control fabric samples were placed in intimate
contact with AATCC bacteriostasis agar, which was previously inoculated a
day culture (Slant cultures) of the test organisms, i.e. staphylococcus
aureus and Escherichia coli. After incubation, it was assessed by visual
examination as well as under microscope (X 40 magnification). The
evaluation was made on the basis of absence or presence of an effect of
bacteria in the contact zone under the specimen and the possible formation
of a zone inhibition around the test specimen. The area of inhibition zone is
measure of antimicrobial effectiveness.
Test method for assessing blood repellant finish:
The blood repellency of sample was assessed using spray test. The
synthetic blood was prepared using distilled water, surfactant, (Acrysol
G110) and red dye according to ASTM F23.40.01 (draft) tasting resistance
of protective clothing material to synthetic blood.
Spray test (AATCC 22-1996):
Water sprayed against taut surface of a test specimen under control
conditions produces wetted pattern whose size depends on a relative
repellency of the fabric. Specimen of 18×18 cm size was conditioned at
65+/-2 RH and 21o+/-1oC.
CONCLUSION
1 The antimicrobial efficiency of the syloxine based treated fabric
reduces with the increase in polydimethylene syloxine concentration but
the blood repellency increases.
2 Simultaneously antimicrobial and blood repellant finish protect from
microbes, and blood repellant finish gives standard spray ratings.
.3 To optimize process concentration of antimicrobial and blood repellent
finish during the process.

7. .4 To Protection from Micro-organism textile materials and clothing are
known to be susceptible to microbial attack, to make product blood
repellent and antimicrobial finished gown.