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ISSN: 2165-8064
Journal of Textile Science & Engineering
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Impact of Various Wrinkle Free Finishes on Wrinkle Recovery Property of Cotton Fabric under Different Variables

Tusief MQ1*, Mahmood N1, Amin N2 and Saddique M1

1Department of Fibre and Textile Technology, University of Agriculture Faisalabad, Pakistan

2School of Textile and Industrial Sciences, University of Management and Technology Lahore, Pakistan

*Corresponding Author:
Tusief MQ
Department of Fibre & Textile Technology
University of Agriculture Faisalabad, Pakistan
Tel: 0300-7978955
E-mail: [email protected]

Received Date: April 29, 2014; Accepted Date: June 30, 2014; Published Date: July 12, 2014

Citation: Tusief MQ, Mahmood N, Amin N, Saddique M (2014) Impact of Various Wrinkle Free Finishes on Wrinkle Recovery Property of Cotton Fabric under Different Variables. J Textile Sci Eng 4:160. doi: 10.4172/2165-8064.1000160

Copyright: © 2014 Tusief MQ, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Abstract

Today everybody wishes for that his/her dress retains just ironed shape. Wrinkle free finishes provide wrinkle free and soft look fabric. Wrinkle free finishes are broadly used in the textile industry to impart wrinkle-resistance to cellulosic materials such as cotton fabric. The application of wrinkle resistance (permanent or durable press) finishes on the fabric improves their wrinkle resistance property. Because of increasing demand for pure cotton fabrics, permanent press finishes are being used on these clothes. In conventional durable press finishing, there are two types of products used (resin type and reactant type). Both of these products contain formaldehyde which cause human carcinogen. Hence durable press finishes free of formaldehyde with trade namesTexicil DC, Knittex RCT, Arkofix NEC and Arkofix ELF (Dihydroxi ethylene urea and Demethyldihydroxi urea) were used in this research study. The present work endeavors to optimize the application of these wrinkle free finishes at various concentrations trying different techniques of applying these finishes on pure cotton fabric for best manufacturing results. The results revealed that the finish Arkofix ELF and Arkofix NEC showed superior results at the concentration level 120 g/l under Pad-flash –cure method of application for the wrinkle free property of the fabric.

Keywords

Wrinkle free finishes; Wrinkle recovery; Fabric finishing techniques; Cotton; Woven fabric

Introduction

In textiles, when fabric is prepared, many processes are done to attain certain properties. One of them is wrinkle free. In the existing market, wrinkle-free action is functional to many types of garments, such as shirts, T-shirts and pants. In the last few years, cotton rich wrinkle-free shirts have taken off the market and the demand is increasing. This is in line with the change in life style, consumers require for value-added products, trend of back to natural and the increase in global journey. Thus garments with natural looking, comfort, attractive and wrinkle free are desirable [1].

One of the most important factors that affect the fabric quality is its ability to recover from wrinkle. Wrinkles are the fabric deformation that is based on its visco-elastic characteristics. Wrinkles are categories into two types, desirable wrinkle for good look of the fabric and undesirable wrinkles that occur during wearing. Most research studies focused on undesirable wrinkles. Fibers, yarn and fabric properties and finishing process play a great role in the development of wrinkles. Many factors like fiber type, bending performance of fibers, fiber diameter, twist in yarn, warp-weft density, fabric construction and fabric thickness, contribute in the development of wrinkles in the fabric. Some fibers like wool and silk have a good resistant to wrinkle while the cellulosic fibers like cotton, viscose and linen has very poor resistance to creasing [2]. Because of increasing demand for pure cotton fabrics, permanent press finishes are being used on these clothes. Normally cotton fibers are spun into yarn, woven into fabric then dyed and the last part of the process is treating it with a cross-linking agents. The applications of formaldehyde based reagents that are used to form these apparels are now creating ripples all across the globe backing up with concern for human health and environment. Earlier an organic acid called butanetetracarboxylic acid (BTCA) was used as an alternate formaldehyde. Due to the high cost of BTCA prevented its application on a commercial scale [3].

When fabrics are compressed during use and care like washing the wrinkles occur. The recovery of wrinkles depend on cross links which hold closest molecular chains together and pull them back into position after the fiber is bent, so it preventing the formation of a wrinkles. Durable press finishes are an important treatment for cotton fabrics which provide wrinkle resistant and permanent press performance for apparel. The cellulose chains are covalently bonded together by cross linking and these covalent bonds cannot be disrupted by water. In conventional durable press finishing, there are two types of products used (resin type and reactant type). Both of these products contain formaldehyde which cause human carcinogen. Some durable press finishes free of formaldehyde are dimethyl dihydroxy ethylene urea (DMDHEU), dihydroxy dimethyl imidazolidinone (DHDMI), polycarboxylic acids such as citric acid and butane tetracarboxylic acid, with hyposphosphite salts, imidazoles or sodium maleate, sodium tartrate or sodium citrate as catalysts, and citric acid as extender [4]. The finishing of cotton fabric for wrinkle resistance generally consists in the application of cross linking agents with suitable catalyst and softener, and in following application with the drying and heating to support cellulose cross linking reaction on the fabric. Concentration increasing of finishes shows some changing in results and the softening agent has an additional effect on fabric [5].

Since crease in cotton occurs due to the breakage of hydrogen bonds under stresses and the reshape of hydrogen bonds as cotton is not an elastic fiber. So there may be following ways to make cotton wrinkle free (prevent distortion of hydrogen bonds)

•Make cotton rigid: Which for obvious reason not recommended?)

•Make cotton elastic: Which for obvious reason not feasible

Therefore the only way left out will be to prevent distortion of hydrogen bonds which is being perfectly carried out by means of BLOCKING the hydrogen bonds forming groups by means of cross linking of -OH groups of cellulosic chains.

There are three most widely used techniques i.e. Pad dry method (Finish is applied and fabric is dried), Pad dry cure method (Here first fabric is dried and then cured after applying finish) and Pad flash cure method (here fabric, after finishing, is dried and cured in one operation in a stenter), to apply these finishes on the fabric. All these techniques have different effects on the fabric quality. Hence this study was conducted to evaluate the performance of the application of different wrinkle free finishes at various concentrations using different applying methods to optimize the quality of pure cotton fabric in respect of its wrinkle recovery property.

Materials and Methods

Acknowledgment

The research work entitled “Impact of Various Wrinkle free finishes on Wrinkle Recovery property of Cotton Fabric under different variables” was initiated in the Department of Fibre and Textile Technology, University of Agriculture Faisalabad and mainly conducted in the Sitara Textile Mills Ltd. Faisalabad, Pakistan.

Methodology

•The study was carried out step-wise as under

•Testing of grey fabric

•Singeing Desizing of fabric

•Fabric Scouring and Bleaching

Dyeing of bleached fabric

•Finishing of fabric

•Analysis of fabric wrinkle recovery

Testing of grey fabric

The experimental material used for this research study was 100% cotton woven fabric in grey state.

Fabric specification

The fabric specifications are given as follows in Table 1:

Weave Plain (1/1)
No. of Ends / inch 60
No. of Picks / inch 60
Warp Count (Ne) 20s
Weft Count (Ne) 20­s­
Wt. of Fabric 125g/ m2

Table 1: Fabric Specifications

Singeing conditions

Flame Intensity 17
Temperature 125°C
Speed 80 m/min

The fabric was passed rapidly over a row of gas flames at high speed 80 m/min and then immediately into a quench bath to extinguish the sparks and cool the fabric.

Desizing recipe

TS-10 14 g/L (desizer)
MRN 10 g/L (soap)
Wetting agent 4 g/L
PH 7.5
Temperature 85°C

After Desizing the fabric was wrapped on a roller.

Scouring recipe

Caustic Soda 30g/L (scouring agent)
K-D 5 g/L (soap)
Sacoron 2 g/L (Squinting agent)
Soda Ash 4 g/L
Temperature 95°C

Scouring procedure

Cotton fabric was put into the scouring bath at about 50°C and then raising the temperature of bath up to 95°C and maintained the temperature for one hour. The bath was then allowed to cool at low temperature. The fabric was taken out, rinsed in hot and cold water respectively. Finally the sample was hydro extracted and dried.

Bleaching recipe

H2O2 (50%) 32 g/L (Bleaching agent)
MLR 10:1
NaOH (50%) 13 g/L
PN 3g/L (Wetting agent)
Sacoron 2 g/L (Squinting agent)
SIFA 12 g/L (Stabilizer)
Temperature 95°C
Steaming Time 40 min.

Bleaching procedure

The scoured dry samples were put into the bleaching machine bath at about 40°C and then raised the temperature of the bath up to 95°C. Maintaining this temperature for about one hour, the bath was allowed to cool and at low temperature the samples were taken out, rinsed first in hot and then in cold water. Finally the samples were hydro extracted and dried [6].

Dyeing of bleached fabric samples

Dyeing is an important process in the wet processing of textile industry. After scouring and bleaching, the samples were subjected to dyeing with reactive dyes to evaluate the cotton fabric characteristics.

Dyeing recipe

Dye 1.Drim Blue 2.92 g/L
Dye 2.Jack L Yellow 1 g/L
Anti-migrating agent (Soda Ash), Na2Co3 25 g/L
Dye.leveling agent (Sodium Sulphate) 20 g/L
Urea 100 g/L
1st Washing Room temperature
2ndWashing 40°C
3rdWashing 65°C
4thWashing Room temperature

Dyeing procedure

Cotton samples were dyed with continuous method using reactive dye. The method consists of padding fabric at 30°C in a bath containing 100 g/l urea, 2.92 g/l Drim blue, 1 g/l jack L yellow, 25 g/l anti-migrating agent and 20 g/l dye leveling agent. Urea besides helping in dissociation of the dye and swelling of cellulose, serves to hold moisture on fabric at high temperature to facilitate diffusion of dye. After padding the fabric was immediately dried without letting the dye to migrate. The dye was reacted with cellulose by heating for 60 seconds at 150°C. A very thorough washing and soaping was done after dye fixation to remove the unfixed dye and to develop the true fastness of dyeing.

Fabric finishing

Curing Pad Dry

Pick Up75%

The variables selected for finishing are given in Table 2.

Finishes Application Methods Concentrations
C1 C2 C3 C4
F1 T1 3 3 4-Mar 4-Mar
T2 3 3 4-Mar 4-Mar
T3 4-Mar 4-Mar 4-Mar 4
F2 T1 3 4-Mar 4-Mar 4-Mar
T2 4-Mar 4-Mar 4-Mar 4
T3 4-Mar 4-Mar 5-Apr 5-Apr
F3 T1 3 4-Mar 4-Mar 4-Mar
T2 4-Mar 4-Mar 5-Apr 5-Apr
T3 4-Mar 4-Mar 5-Apr 5-Apr
F4 T1 4-Mar 4-Mar 4-Mar 4
T2 4-Mar 4-Mar 5-Apr 5-Apr
T3 4-Mar 4-Mar 5-Apr 5-Apr

Table 2: Variables selected for the study

Test Method of the Study

The Wrinkle Recovery of the fabric was tested according to AATCC [7] Test Method.

Principle: A test sample is wrinkled in standard atmospheric situation in a standard wrinkling device under a predetermined load for a prescribed period of time. The sampling is then reconditioned in the standard atmosphere for textile testing and evaluated for appearance by comparison with 3-dimensional reference standards.

Apparatus: Wrinkle Tester recommended by AATCC

•3-Dimensional Wrinkle Recovery Replicas recommended by AATCC

•Standard conditions (22 ± 2°C and 65 ± 2% RH)

•Fabric hangers with clips

•A lighting and evaluation area in a dark room using overhead lighting

Test Specimens: Three test specimens of 15 x 28 cm each were taken and tested with the direction of the warp of woven fabric.

Procedure: Raise top flange of wrinkle tester and hold in top position with locking pin. Wrap one long edge 28 cm of the specimen around the top flange of the AATCC Wrinkle Tester with the face side of the specimen on the outside and clamp it in position using the steel spring and clamp provided. Arrange the end of the specimen so that they are opposite to the opening in the spring clamp. Wrap the opposite long edge of the specimen around the bottom flange and clamp as describe above. Adjust the specimen by pulling on its bottom edge so that it lies smooth without sagging between the top and the bottom flanges. With draw the locking pin and lower the top flange gently with one hand until it comes to rest. Immediately place a total of 3500 grams weight on the top flange and record the exact time. After 20 min remove the weights, remove the springs and clamps, raise the top flange and gently remove the specimen from the tester so as not to distort any induced wrinkles. With a minimum of handling, place the shorter edge 15 cm under the clips on the cloths hanger and allow the specimen to hang vertically in the long direction. In the standard atmosphere after 24 h gently remove the hanger with the specimen to the evaluation site.

Evaluation: The standard having rating from 1-5 are used for the grading of fabric wrinkle recovery.

Atmospheric conditions: The testing of samples was carried out in laboratories where standard atmospheric conditions 65 ± 5% relative humidity and 20 ± 2°C were maintained.

Results and Discussion

Fabric wrinkle recovery

The visual results obtained by gray scale of fabric wrinkle recovery after applying wrinkle recovery finishes (F) at different Chemical Concentration (C) and application methods (T) is presented in Table-3. The results indicate that overall performance of F4 (4-5) is better than F1, F2 and F3 for fabric wrinkle recovery. For F1, F2 and F3 it ranges between good (3) to very good (3-4) while for F4 it ranges between very well to excellent. Wrinkle recovery increases with increasing chemical concentration. C3 and C4 showed better results than C1 and C2. These findings are in line with the results concluded in a previous study that dry wrinkle recovery angle (DWRA) and wet wrinkle recovery angle (WWRA) was increased with increasing agent concentration [8]. Similarly in another study it was disclosed the concentration of durable press finishing of cotton fabric provides a high-quality copolymer wrinkle resistance. Also wrinkle recovery angle (WRA) increased by increasing finishing agent concentration [8].

From the Table 3, it is clear that T3 showed better results than T1 and T2. The results get support from the research findings that the little wrinkle recovery in case of pad-dry technique is due to the retardation of the catalytic reaction of finishing agent which finally reduces the frequency of formation of cross-links within cellulose fiber structure. On the other hand, significant improvement of wrinkle recovery is observed both in case of pad-dry-cure and pad-flash-cure technique, but the pad-flash-cure technique showed the best result In case of chemical concentration (C) the results showed that as we increase the chemical concentration the fabric wrinkle recovery increased [9].

Finishes Application Methods Concentrations
C1 C2 C3 C4
F1 T1 3 3 4-Mar 4-Mar
T2 3 3 4-Mar 4-Mar
T3 4-Mar 4-Mar 4-Mar 4
F2 T1 3 4-Mar 4-Mar 4-Mar
T2 4-Mar 4-Mar 4-Mar 4
T3 4-Mar 4-Mar 5-Apr 5-Apr
F3 T1 3 4-Mar 4-Mar 4-Mar
T2 4-Mar 4-Mar 5-Apr 5-Apr
T3 4-Mar 4-Mar 5-Apr 5-Apr
F4 T1 4-Mar 4-Mar 4-Mar 4
T2 4-Mar 4-Mar 5-Apr 5-Apr
T3 4-Mar 4-Mar 5-Apr 5-Apr

Table 3: Wrinkle recovery of fabric samples

Conclusions

In this research various wrinkle free finishes (Texicil DC, Knittex RCT, Arkofix NEC and Arkofix ELF) applied to fabric at different concentrations (60, 80, 100 and 120 g/l) by adopting the different application methods (Pad-dry method, Pad-dry-cure method and Pad-flash-cure method). This study disclosed that the finish Arkofix ELF and Arkofix NEC showed superior results in respect of Fabric Wrinkle Recovery at concentration level 120 mg/l, when applied by using Pad-flash-cure method. It is because pad-flash-cure technique for applying finish on cellulose fabric can form strong crosslink network with-in the microstructure of cellulose as compared to pad-dry and pad-dry-cure methods.

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