Regenerated Fibres.

1. REGENERATED
FIBRES

2. Presenting By…
Salman Ahmed
Department of Textile
Engineering
Port City International
University

3. Introduction
Regenerated Fibres
Lyocell
Linen
Modal
Alginate
Crabyon

4. INDRODUCTION
The production of regenerated cellulose fibers as early as the
1930s resulted in the generation of a new class of fibers. For
several decades, the production of regenerated cellulose
fibers such as viscose rayon and cuprammonium rayon was
extensively done, and these fibers were considered to be
ideal substitutes for the natural cellulose fibers.
Traditionally, regenerated cellulose fibers were produced
using wood as a source for cellulose.

5. REGENERATED FIBERS
LYOCELL
LINEN
MODAL
ALGINATE
CRABYON

6. LYOCELL
Introduction:
Lyocell is a manmade cellulosic fiber produce by
regenerating cellulose fibre from out a solution of
cellulose in an organic solvent.
Tencel is the brand name of Lyocell.
Raw Material:
• Cellulose.
• Most abundant natural resource on earth.
• It is obtained from wood pulp.
• Trees like Eucalyptus, Bamboo and Pine tree.

7. PRODUCTON PROCESS
Pulp/Wood pulp
NMMO Mixing
Dissolution
Filtration
Spin/strech
Washing
Drying
Stable fibre or tow

8. PROPERTIRS
 Physical structure is a more rounded
cross section.
 The structure is “Homogenous” and
Dense.
 Soft, strong, absorbent.
 Wrinkle resistant.
 Can be hand washable.
 Excellent weight strength.
 Good drapability.
 Bio degradable.

9. ADVANTAGES & DISADVANTAGES
Advantages:
oAbsorvent
oBio degradable
oStrong
oResist sunlight aging adrasion
Disadvantages:
oSusceptble to midew

10. APPLICATION
Professional business wear
Hosiery
Casual wear
Upholstery
 Filters
Medical dressings
Botanic tencel bed

11. LINEN
Introduction:
This fiber is obtained from the stem
of the flax plant, this is an animal
plant growing maximum about 40
inches.
Linen is a cellulosic fibre derived
from the stem of the flax plant.
Much stronger and more lustrous
than Cotton.
One of the oldest and most
expensive textiles in the world.

12. CHARACTERISTICS
• Comfortable to wear.
• Has good strength; twice as strong as cotton.
• Hand washable or dry cleanable.
• Well absorbent of dyes and prints.
• Varies from light weight to heavy weight.
• Has no static or pilling problems.
• In hot weather, it lowers the body temperature upto 3-4 %.

13. CHEMICAL PROPERTIES
Effects of Acids: Linen fiber is damaged by highly densified acids but
low dense acids does not effect is wash instantly after application of
acids.
Effects of Alkali: Linen has an excellent resistance to alkalis. It does not
affected by the strong alkalis.
Effects of Organic solvents: Linen fibre has high resistance to normal
organic solvents.

14. APPLICATION
Shirts, Pants, Blouses, skirts
etc.
Upholstry.
Bedspreads.
Dish towels.
Table Linens.

15. MODAL
Introduction:
Modal is a wood pulp based
cellulosic fibre, made out of
pure wooden chips from the
beech tree, technically as the
european Schneider Zelkova
tree.
Raw Material:
• Cellulose.
• Wood pulp.

16. PROPERTIES
• Modal is a soft, smooth, and
breathable fabric.
• Super-absorbent, plus resistant to
shrinkage.
• Resistance to alkalis but sensible
to acids.
• High breaking strength.
• Remains absorbent, soft & supple
after repeated washing.
• Good color stability.

17. Modal Advantages Disadvantages
• Super-absorbent.
• Resistant to shrinkage
• High breaking strength
• Soft, smooth, and breathable.
• The color stays for long and does not fade easily. Modal doesn't really
have any major disadvantages.
• Prone to stretching and pilling.
• After washing, it is necessary to iron modal clothes, just like cotton.

18. APPLICATION
• Towels, bath robes, underwear,
bedsheets.
• Exhausters Conveyor belts and
washing tube pipes.
• Wide range of textile industries.

19. ALGINATE
INTRODUCTION: Alginate fibre are
made from sodium alginate, which
is a natural polymer extracted
from brown seed.The biological
function of alginate gives strength
and flexibility to the algal tissue
and regulate the water contant in
the seaweed.
RAW MATERIAL: Sodium Alginate
or Calcium Alginate, Algic acid.

20. PRODUCTION PROCESS

21. PROPERTIES
• Flexibility: It is about 14% at a stress of 100 gm/cm2
• Elasticity and elastic recovery: Alginate are highly
elastic but less when compare to the agar. 97.3% elastic
recovery occurs.
• Strength:The compressive strengths of alginate gels
range from 5000-8000 gm/cm.The tear strengths vary
from 350-700 gm/cm.
• Dimensional Stability: It is placed in water it absorbs
water and swells.
• Shelf Life: Alginate impression material have a short
self life.

22. ADVANTAGES & DISADVANTAGES
ADVANTAGES
• It makes an accurate
impression.
• It is easy to work with, has good
vicosity and is low in adhesive
quality.
• It is comfortable to the patient.
• Inexpensive to the dentiest.
• The process is not time
consuming.
DISADVANTAGES
• Can not be used alone for
compressing the tissues.
• It is not accurate enough for
crown.

23. APPLICATION
Used for partial dentures with
clasps.
For making preliminary
impressions for complete
denture.
For orthodontic and study
models.
For duplicating models.

24. CRABYON
Introduction:The Crabyon fibre is realized with a bland of chitosan.
Chitosan is a product derived from chitin, a compound of natural
origin.
Raw Material:
Cellulose.

25. PROPERTIES
Very strong antibacterial
effect.
Total biodegradability.
Biocompatibility.
High humidity absorption.
Heavy metal absorption.
Oil absorption inhibition.

26. ADVANTAGES
• Effective of antibacterial function for a long time.
• No change in physical properties.
• A lot of consideration of environment.
• Excellent for weak or sensitive skin.

27. APPLICATION
• Sports, Underwear, Socks,
Uniform, Pyjamas, Ladieswear,
Baby Cloths.
• House interior,Towels, Non
Woven Fabrics.