ISBN : 978-602-17761-4-8
20
Proceedings of 2
nd
REPTech Crowne Plaza Hotel, Bandung, November 15-17, 2016
© 2016 Published by Center for Pulp and Paper through 2
nd
REPTech
6. Crease Recovery
The Result of crease recovery warp and weft direction can be seen in Table 5. Crease recovery a fabric is ability fabric to return from tangling is iber bending because of the pressure, due to the derailment of
a molecular chain, thus changing the composition of the bonds between the molecular chains into a new arrangement. If bending is released back then the molecular chain can not be returned at the beginning
position. Because the new position maintained by the arrangement of the bonds between new molecular chains. The analysis of variance it turns out that concentration of sodium chloracetate, sodium hydroxide,
and batching time are affected to the crease recovery of warp and weft direction the fabric. Table 5 it is seen that the Carboxymethylation process on polyester cellulose fabrics can improve the crease recovery
fabric.The highest crease recovery of warp and weft directions fabric obtained by using concentration of 3N sodium chloracetate, 8 N sodium hydroxide and 2 hours batching time, resulted 149
o
C warp direction and 158
o
C weft direction. The use of batching time up until 2 hours crease recovery fabric increase, but the longer of batching time used the crease recovery of fabric will be decreases. The use of concentration
8N sodium hydroxide and up to 3N sodium chloracetate the crease recovery increase, but using higher concentration the crease recovery will be reduced. This can be explained as follows: crease recovery fabric
affected by the construction of the fabric in this case number Tex of yarn, pick density and stiffness of fabric. Use of sodium chloracetate cause the fabric becomes denser and treatment with sodium hydroxide
causing erosion hydrolysis on the surface of a polyester iber, yarn surface consequently becomes uneven rough. Because of erosion polyester, the fabric [3,4]., becomes more reined, the woven into more rarely,
and pick density reduces. Fabrics that more rarely, such as cellulose polyester fabrics processed with sodium hydroxide when folded is still possible slip. That then the crease recovery fabric becomes larger.
When pick density of fabric is higher and consists of a coarse thread that makes the fabric thicker and
denser, if the fabric is folded dificult to slip, then the outside of the folded fabric greater elongation than the inside. The outer fabric changes shape great. Because of a large elongation, the elasticity of the fabric
decreases so that the crease recovery is decrease anyway.
Table 5. The Crease Recovery of Warp and Weft Direction Fabric
Batching Hours
Sodium Hydroxide N
Sodium Chloracetate N Warp Direction
Weft Direction 2
3 4
2 3
4 2
6 143.5
148.0 134.0
144.8 157.0
134.5 8
148.5 149.0
144.0 147.0
158.0 142.0
10 135.8
135.7 128.5
142.7 146.0
133.0 12
134.9 135.5
112.0 135.5
142.5 127.0
4 6
143.0 146.0
129.0 142.3
156.0 132.2
8 146.0
148.5 144.0
146.0 156.0
140.0 10
129.3 134.0
127.7 141.5
144.5 130.0
12 127.6
133.9 106.5
135.0 141.0
124.0 6
6 142.5
143.0 128.0
132.2 147.0
124.8 8
145.1 148.0
142.3 145.0
153.0 140.0
10 123.8
133.3 126.5
140.0 141.0
124.0 12
123.1 132.8
95.8 134.5
139.9 124.0
8 6
142.0 142.5
121.0 127.8
140.0 124.6
8 145.0
147.5 139.8
142.5 150.0
139.0 10
122.3 131.5
125.4 139.0
130.3 123.0
12 121.7
131.0 93.2
130.0 130.2
124.0 10
6 141.0
142.0 116.0
122.8 137.5
124.0 8
144.0 147.0
139.5 139.5
145.5 135.5
10 122.0
120.3 116.5
139.0 124.5
120.0 12
120.0 120.1
90.5 123.8
124.1 113.0
Raw material 109
112
ISBN : 978-602-17761-4-8
21
Proceedings of 2
nd
REPTech Crowne Plaza Hotel, Bandung, November 15-17, 2016
© 2016 Published by Center for Pulp and Paper through 2
nd
REPTech
7. Dimensional Stability
