1 / 18

3.2.10 Rearranged Twills

3.2.10 Rearranged Twills. 1. Concept Rearranging a weave means taking single thread or groups of threads from the base weave and rearranging them in a different order. See Fig. 3.36. Base twill. Fig. a :. Fig .a : the picks are rearranged in groups of two in sateen

cadence
Download Presentation

3.2.10 Rearranged Twills

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 3.2.10 Rearranged Twills 1. Concept Rearranging a weave means taking single thread or groups of threads from the base weave and rearranging them in a different order. See Fig. 3.36

  2. Base twill Fig. a: Fig .a : the picks are rearranged in groups of two in sateen Fig .b :a different rearrangement in warp direction in groups of two Fig. b:

  3. 2. They are constructed as follows: • a) Select base weave. • b) Determine a plan for rearrangement. • c) Rearrange threads: ends or picks.

  4. 3. Example: • Base twill the new order of warp threads is 7,8; 5,6; 3,4; 1,2. Base twill rearranged twill in the given order

  5. 4. Applications • Many characteristic fabrics can be made by using rearranged twills due to its versatility.

  6. 3.2.11 Shaded twill • 1. Concept • The shaded twill represents a gradual transition from the twill with weft effect to warp effect, and vice versa. It is used mostly in Jacquard weaving for large-pattern fabrics. See Fig.3.37

  7. Fabric sample:

  8. 2. Weave drawn Formulae to calculate the repeats: Ro = Rob (Rob-1 ) Ry = Ryb Where: Ro---new weave repeat; Rob---the base weave repeat.

  9. 3.3 Satin/Sateen weaves Derivatives • 1.Reinforced sateen It is constructed by using the original sateen as the base and adding overlaps. See Fig. 3.38 Adding a warp float at the right of the original one

  10. Example • Fig. 3.39 shows a 11/8 reinforced sateen which is often used for worsted fabric called satin back gabardine. • The face of the fabric has a twill appearance and back has a satin appearance.

  11. 2. Shaded sateen • Like the shaded twill, the shaded satin represents a gradual transition from the sateen with weft effect to the satin with warp effect, and vice versa. See Fig.3.40 Ry=Ryb=5 RO=Rob(Rob-1)=5×4=20

  12. 3. Rearranged sateen/satin weaves • It can be constructed by rearranging the sequence of the picks or varying the shift. See Fig. 3.41, 3.42. Obtained from varying the shift Shifts (Sy)=4,3,2,2,3

  13. Obtained from rearranging the sequence of the picks

  14. Home work: 1. Base weave ↗, the order of warp threads is 1,2, 7,8, 13,14, 5,6, 11,12, 3,4, 9,10, draw the rearranged twills. 2. draw a shaded twill from 1/3↗ to 3/1↗.

  15. Chapter ThreeSummary: • Derivatives of Elementary Weaves • 3.1 Plain weave derivatives. • 1. Rib weaves Warp rib weaves; Weft rib weaves • 2. Hopsack weaves

  16. 3.2 Twill weave derivatives • 1. Reinforced twill • 2. Compound twills • 3. Elongated twills • 4. Curved twills • 5. Angled twills • 6. Herringbone and broken twills • 7. Diamond and Diaper • 8. Zigzag Weaves • 9. Entwined Twills • 10. Rearranged Twills • 11. Shaded twill

  17. 3.3 Satin/Sateen weaves Derivatives • 1.Reinforced sateen • 2. Shaded sateen • 3. Rearranged sateen/satin

More Related