tyre cord srk

7/27/2019 Tyre Cord Srk

1/33

Tyre cord

Technical textiles


2/33

CONTENTS

Introduction Parts & structure of tyre cord

Function of parts

Classification of tyres

Raw material in tyre cord

Properties of raw material Structure of tyre cord fabric

Types of tyre cord

Tire cord manufacturing

Manufacturing process

Uses of tyre cord

Advantages of tyre cord

Comparison with other material

New Developments

Cost of tyre cord


3/33

INTRODUCTION

Tyre is a pressure vessel and cord keeps it dimensionally

stable.

Tyres have to carry heavy loads, steel and fabric cords

are used in the construction to reinforce rubber

compound and provide strength.

Tyre yarns of polyester, rayon, nylon, aramid, glass, or

steel are twisted to 5 to 12 turns per inch.


4/33

PARTS & STRUCTURE OFTYRE CORD

TREAD

RIB

GROOVES

SIPES

SHOULDER

CAP PLIES

STEEL BELT

RADIAL PLIES

BEAD CHAFFER BEAD

TREAD BLOCK


5/33

FUNCTION OF PARTS OFTYRE

Tread

it is thick layer (approx. 18-20 mm) of rubber whichcomes into contact with road.

Rib it is designed for noise suppression.

Grooves to traction in all weather, directional control, cool

running and all rolling resistance.

Sips serves as the support for the wheel moving on theroad.

Shoulder upper portion of the side wall just below the treadedge that affects tyre heat behavior and corneringcharacteristics.

Cap plies main load baring components layers of fabric cordextending from bead to bead to reinforce the tyre and

maintain the shape.


6/33

FUNCTIONS OF PARTS OFTYRE

Steel beltlocated below cap plies to increase tensile strength of

tyre. steel belt or layer provides well balanced combination of

rubber & fabric. Thickness is 0.2 to 0.38 mm. this are the steel cord

plated with copper or zinc.

Radial plies thin layer of rubber inside the tyre containing

compressed air tube. Sidewallportion between tread to bead. it is rubber sheet 1.5 to

3.5 mm thick protecting tube from any kind of mechanical or

physical damage and moisture penetration.

bead chafer narrow strip of flex material around the outside of

the bead that protects tyre against wear & tear and prevent dirt

and moisture from getting into the tyre.

Bead structure composed of high tensile strength steel wire which

holds the tyre assembly onto the rim of the wheel for handling

performance.


7/33

RAW MATERIAL IN TYRECORD

TEXTILEMATERIAL

VISCOSE RAYON

NYLON 6

& 66

Polyester

ARAMIDE


8/33

PROPERTIES OF NYLON 66

Nylon 66 tends to form strong interchain hydrogen bonds. This

results in a stronger & more crystalline polymer that softens or

melts at relatively higher temperature.

It has a higher tenacity and is less subjected to shrinkage.

Better fatigue resistance.

Higher resonance frequency.

No flat spotting.


9/33

Structure of Tyre Cord Fabric

The tyre cord fabric is

comprised of warp cords

oriented in the longitudinaldirection and weft yarns

oriented in the lateral

direction. The warp cords

are used in reinforcingpneumatic tires.


10/33

TYRE CORDMANUFACTURING

The cord fabric consists of yarns of a linear density of

500 tex in warp and common cotton yarns with a

linear density of 16.6-25 tex in weft.

The properties of cord depend on the number of

plies of thinner and number of twists to be given inyarn.


11/33

Processing of Tyre Cord

Most tyre companies produce tyre cord

from high tenacity continuous filament

yarn supplied by various fiber

manufacturers.


12/33

MANUFACTURING PROCESS

Steps of manufacturing tyre cord-

1. Spinning- By melt spinning we get filaments.


13/33

2. Twisting

Its purpose is to-

To prevent filament breakage.

Improved coherence of yarns. To improve fatigue resistance.

To improve weaving workability.


14/33

3. Cabling- It is done by ply cable

winding machine. Yarn tension

of about 0.02 cN/tex is

recommended.

4. Weaving- 100 or 1500 cords with

3-1 pick per cm of light Cotton,

Rayon, PET yarn threads.

A type of fabric is obtained in onedirection of warp as far stronger

than in the other direction.


15/33

5. Dipping- During Tire cord

dipping process an

Adhesive was applied & the

fabric is treated under

controlled condition of time.

After dipping fabric passes

through vacuum suction

lines to remove the excessdip before entering a drying

oven, where water is

removed.


16/33

6. Vulcanization- It is a

process by which rubber is

heated with sulphur to

create a network ofchemical cross-links


17/33

M/C INFORMATION

Tyre Cord fabric manufacturing is carried out on special looms:-

1. Heavy power looms TT-160

2. Automatic loom AT-175K3. CTE175-KM


18/33

Specifications of loom

Loom width- 190 - 200 cm

(approx)

Cloth take-up upto 550 mm

or on demand with batching

up to 1200 mm. Single warp beam up to 280

cm

Weft insertion rate up to 550

MPM


19/33

Tyre comparision

Aircraft vs. passenger

tyre applications:

Passenger tyre: all-season

tyre, which is built toendure long-term wear

while providing

adequate performance

in almost all conditions.
http://i.ehow.co.uk/images/a05/ok/sg/passenger-tires_-800X800.jpg


20/33

TYPE OF TYRE CORD

TIRE CORDFABRIC

NYLONTIRE CORD

STEEL TIRECORD

POLYESTER

TIRE CORD

RAYON TIRECORD
http://www.supplierlist.com/product_view/senyuex001/107903/100919/Chafer_fabric.htmhttp://www.supplierlist.com/product_view/senyuex001/107904/101206/Steel_cord.htm


21/33

PROPERTIES

Nylon tyre cord fabric

1. Optimum reinforcing material

2. High tenacity

3. High toughness

4. Superior fatigue resistance

5. Good adhesion to rubber


22/33

PROPERTIES

Rayon fabric

1. High initial modulus

2. Improves testingtemper about 70-30

degree Celsius

Fabric quality is based on its strength, stretch, shrinkage & elasticity


23/33

Polyester tyre cord fabric

1. High strength

2. Low shrinkage

3. High modulus4. Increase extensibility


24/33

Steelfabric

1. Tensile strength

2. Elongation

3. Stiffness

4. Superior corrosion

resistance

5. High modulus


25/33

USES OF TYRE CORD FABRIC

POLYESTER- MAINLY USED FOR PASSENGER CAR AND LIGHT

TRUCK RADIAL TYRES.

NYLON- ARE USED AFTER BEGINNING OPERATION OF

VEHICLE UTILIZING TYRES.

TO REDUCE PRODUCTION COST.

ARE USED IN TYRES IN TRUCK, BUS & OFF ROAD VEHICLES.

STEEL- IT IS USED INSIDE TYRES.


26/33

Applications of tyre cord

Applications

Automotive

Exterior

Passenger car tires

Bus and truck tires Earth mover, off the road

Industrial tires

Agricultural / farm tires

Agricultural & excavator tracks Snowmobile tracks

Motor cycle tires

Advantages & uses of tyre


27/33

Advantages & uses of tyrecord

Advantages:

Meeting the highest performance, safety, environment

and cost criteria

Innovative constructions for a longer tyre life

Enhanced wire-to-rubber adhesion for higher safety

Stronger wires and new cord constructions that lead to

lower costs, lower weight and fuel savings


28/33

Best reinforcement material:

reducing friction

Wears between cord threads during compression,

bending & stretching

Also greatly improves fatigue resistance, endurance life

& pressure holding performance.

Deals with: Geotextiles & civil engineering.

Uses of tyre cord

I ti t ti f


29/33

Innovative constructions forlonger life

Polyester tyre cord fabric:

leads to high break strength, dimensional stability, good

in humidity, good creep resistance, high modulus etc.

Deals with: hot water bottles , conveyer belt fabric, high

modulus low shrinkage yarn.


30/33

Market Forecast - Tire Cord and Tire Fabric Mills:Market forecasts show the long term outlook for the Tire

Cord and Tire Fabric Mills industry. The following five-

year forecast utilizes advanced econometric techniques

that take into account both short-term and long-term

industry trends.

Market view & price ratio of tyre

cord


31/33

DEVELOPMENTS & SCOPE OFCORD FABRIC

For high load lifting capacity cord is made for

steel yarn.

Cord is manufactured of glass fibers in somecountries.

In recent years, cushion cord fabric for these

tyre is usually made from stiff fibers with theminimum elongation


32/33

belts reinforced with kevlar aramid fiber

Improved rubberized fabric sheets used in

waterproof covers, flexible storage bins ,

frictional surface etc.


33/33

THANK YOU

tyre cord srk

Documents