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Twisted Yarn

 

The twisted yarn production unit is the most recent fabrication sector at Porcher Brazil. It began producing glass and polyester yarn for electrical insulation in 2006. It produces for sale in the national market and exports (to other companies in the Group and to clients around the world). With technology and know-how imported from the head office in France, it has the capacity for production of a wide range of articles.

There are basically two primary groups of yarn (cables):
100% glass twisted yarn, and
Glass + polyester twisted yarn (a registered trademark of the group: Chavergal®.

These cables are obtained through the mechanical torsion of glass filaments (in general, of type E), in the options “single strand” or “parallel strands” (a cable composed of many cables).

These operations have as their objective the improvement of the physical characteristics of the yarn, aiming to augment its initial properties and/or meet specific needs of the final application.
Identification Systems of the yarns.

Two different systems are used across the world for identification of this type of product.
ISO 2078 system: Type of yarn, title under the Tex system, and torsions per meter;
ASTM D578 system: Type of yarn, units in inches, and torsions per inch.
The basic characteristics of glass filaments are:
High tensile strength;
Dimensional stability;
Does not rot;
Non-combustible;
High resistance to heat.


Conversion table between the two systems

Tex = grams in 1000 meters of yarn
Tex = 4961/h.y.p.p
h.y.p.p.  = “hundred yards per Pound”
(100 jardas por libra)
1 yard (yd) = 0,9144 meters
1 pound (lb) = 0.4536 kg
1 inch (in) = 25.4 mm
1µm = 1/1000 mm

Diameter
in Microns
Diameter in
US System

5

D

6

DE

7

E

9

G

11

H

13

K

16

M

Conversion table for title X linear density:

Tex

5,5

11

22

34

68

h.y.p.p

900

450

225

150

75/67

Conversion table for torsion/m X torsion per inch

t/m

20

40

100

150

180

tpi

0.5

1.0

2.5

3.75

4.5

Example of the same yarn identified by both systems:


 

EC7 22 x 1 x 3 S180

=

ECE 225 1/3 4,5S

 

ISO 2078 system

 

ASTM D578 system

E

Type of glass

E

Type of glass

C

Continuous filament

C

Continuous filament

7

Strand diameter in microns

E

Diameter in the US system (*)

22

Nominal title in Tex

225

Linear density: “100 yards/inch”

1 x 3

1 twisted cable and 3 twisted cables

1/3

1 twisted cable and 3 twisted cables

S180

180 torsions/m in the S direction

4.5S

4,5 torsions per inch in the S direction

(*) see table above

List of 100% glass yarns with prepared specification:

Description of the product
by the ISO system

Description of the product
by the ASTM (US) system

Internal Porcher
Brazil code

EC5 11x1x2 S180

ECD 450 1/2 4.5 S

E008/A/7636

EC7 22x1x2 S150

ECE 225 1/2 3.75 S

E013/A/8542

EC7 22x1x3 S150

ECE 225 1/3 3.75 S

E014/A/8542

EC7 22x1x3 S180

ECE 225 1/3 4.5 S

E044/A/8542

EC9 34x1x2 S150

ECG 150 1/2 3.75 S

E038/A/8542

EC9 34x1x3 S150

ECG 150 1/3 3.75 S

E016/A/8542

EC9 68x1x2 S100

ECG 75 1/2 2.5 S

E047/V/H6

EC9 68x1x2 S150

ECG 75 1/2 3.75 S

E021/V/H6

EC9 68x1x3 S150

ECG 75 1/3 3.75 S

E023/V/H6

EC9 68x1x4 S150

ECG 75 1/4 3.75 S

E025/V/H6

EC5 11 tex Z40 x 21

ECD 450 Z1 X 21

E042/A/3064

EC5 11 tex Z40 x 30

ECD 450 Z1 x 30

E037/A/80130

EC5 11 tex Z40 x 42

ECD 450 Z1 x 42

EC41/A/3064

List (B) of Chavergal® yarns = glass + polyester (both in filament)

Description of the
yarn (ISO system)

Composition

Internal Porcher code

Type of package

(EC5 5,5 + PES 44)
10tex S200

55% glass 45%PES

C002/NA/BBC

BBC Tube

(EC5 5,5 + PES 50)
11tex X 14

53% glass 47%PES

C003/AT/4280

Cardboard Tube ø42,
height 80 mm

(EC5 5,5 + PES 50)
11tex X 20

53% glass 47%PES

C004/AT/80130

Cardboard Tube ø80,
height 130 mm

(EC5 5,5 + PES 50)
11tex X 30

53% glass 47%PES

C006/AT/4280

Cardboard Tube ø42,
height 80 mm

(EC5 11 + PES 74)
20 tex S150

57% glass 43%PES

C010/AP/BBC

BBC Tube

(EC5 11 + PES 74)
20 tex X 8

57% glass 43%PES

C011/AP/1680

Cardboard Tube ø16,
height 80 mm

(EC5 5,5 + PES 50)
11tex S200

53% glass 47%PES

C015/AT/BBC

BBC Tube

(EC5 5,5 + PES 50)
11 tex S150

53% glass 47%PES

C012/AT/BBC

BBC Tube

(EC5 5,5 + PES 50)
11tex X 40

53% glass 47%PES

C016/AT/4280

Cardboard Tube ø42,
height 80 mm

The yarn can be rolled into a cardboard or plastic tube.

NOTE: In case other 100% glass or glass + PES yarn construction options not mentioned on lists A and B, above, are required, please, contact us.

Apresentação, Embalagem e Orientações:

In the specification of each product can be found more details about the items mentioned above, as well as the characteristics of each item, prices and tolerances for deviations.

 
 
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