Product atalog

Polyethylene terephthalate

The state-of-the-art production process of PET, characterized by a continuous synthesis of polymer, makes it possible to produce high-quality PET for use in the production of high and medium tenacity yarns and moulded articles.

Grades of polyethylene terephthalate and their application:
grade D for textile yarns;
grade E for industrial yarns;
grade ET for Trilobal yarns;
grade GR for high modulus low shrinkage industrial yarns;
grade B2 for industrial yarns, films;
grade S for fiber, Christmas tree decorations;
grade PN-3 for film and magnetic tape backing;
grade F for injection moulding of polyethylene terephthalate to produce bottle preforms and other food packaging;
grade TS polyethylene terephthalate with increased thermal stability to produce thermostable polyester industrial yarns.
Appearance, physical and chemical properties of the polyethylene terephthalate correspond to the values given in Tables 1, 2, 3, 5, 6

Polyethylene terephthalate copolymer

grade SF2 for copolymer used to produce bottles, jars and other packaging for food, health and beauty aids, cleaning agents and other household chemicals;
grade SN for polyester fiber.
Appearance, physical and chemical properties of the polyethylene terephthalate copolymer correspond to the values given in Table 4.

Table 1

Parameter description

Grade

D

E

GR

B2

ET

Appearance

Pellets from light grey to light yellow

Transparent pellets from colorless to pale blue

Pellets from light grey to light yellow

Pellet size, mm

(3,8±0,5)(2,5±0,5)
(4,0±0,75)

-

Weight of 100 pellets, g

-

-

1,9-2,1

1,9-2,2

3,6-4,4

Specific viscosity in dichloroacetic acid, units

827±7

835±9

835±7

835±9

835±9

Moisture (water) content, % w/w, not more than

0,1

0,1

0,1

0,1

0,2

Titanium dioxide content, % w/w

0,300±0,020

0,020±0,005

0,010±0,005

-

0,010±0,005

Color difference coordinates CIE 1976 with illuminant D65, geometry d/8(d/10) specular component excluded:
a) L*, units, not less than
b) b*, units, not more than
75
8
58
4
51
5
60
-
51
5

Carboxyl end groups (carboxylic number), mmol/kg, not more than

30,0

30,0

30,0

25,0

30,0

Diethylene glycol content, % w/w, not more than

0,8

0,8

1,1

1,1

0,9

Softening (melting) point, o

261±2,0

261±2,0

259±2,0

259±2,0

259±2,0


Table 2

Parameter description

Grade S

Appearance

Pellets from colorless to grey or yellow

Pellet size, mm, not more than

(6,0 4,0 11,0)

Specific viscosity in dichloroacetic acid, units

700 - 900

Moisture (water) content, % w/w, not more than

0,2

Titanium dioxide content, % w/w

0,0 - 0,5

Table 3

Parameter description

Polyethylene terephthalate grade PN-3

Appearance

Transparent pellets

Pellet size, mm

(3,8±0,5)(2,5±0,5)(4,0±0,75)

Specific viscosity in dichloroacetic acid, units

(840 -870)*±10

Moisture content, % w/w, not more than

0,5

Color difference coordinates CIE 1976 with illuminant D65, geometry D/8 specular component excluded:
- L*, units, not less than
- b*, units, not more than
55
7,5

Carboxyl end groups, mmol/kg, not more than

30,0

Softening point, , not less than

255

Ash content, % w/w, not more than

(0,20 - 0,48)

Silicon dioxide content, % w/w, not more than

(0,10 - 0,40)*±0,04


Table 4

Parameter description

Grade

SF2

SN

Appearance

Transparent pellets from colorless to pale blue

Transparent pellets from colorless to greenish

Weight of 100 pellets, g

1,80-2,20

3,60-4,40

Specific viscosity in dichloroacetic acid, units

(750-825)*±9

920-970

Moisture content, % w/w, not more than

0,1

0,4

Color difference coordinates CIE 1976 with illuminant D65, geometry d/8 specular component excluded:
L*-units, not less than
*-units, not less than
b*-units, not more than

 

52,0
-
1,5

 

43,0
-4,0
10,0

Carboxyl end groups, mmol/kg, not more than

30

35

Content of pellets with foreign impurities, % w/w, not more than

0,07

0,3

Diethylene glycol content, % w/w

1,0 2,0

4,0 - 9,0

Melting point,

250±5

-

Softening point,

-

105-130


Table 5

Parameter description

Polyethylene terephthalate grade F

Appearance

Transparent pellets from colorless to pale blue

Weight of 100 pellets, g

1,80 - 2,20

Intrinsic viscosity, dl/g

0,58 - 0,64

Moisture content, % w/w, not more than

0,1

Color differences in CIELAB 1974 with d/100, D65
- L*, units, not less than
- a*, units
- b*, units, not more than
54,4
-2,3 -0,3
1,5

Softening (melting) point,

255±3

Diethylene glycol content, % w/w

1,8-2,2

Carboxyl end groups, mmol/kg, not more than

30


Table 6

Parameter description

Polyethylene terephthalate grade TS

Appearance

Pellets from light grey to light yellow

Pellet size, mm

(3,8±0,5)*(2,5±0,5)*(4,0±0,75)

Specific viscosity in dichloroacetic acid, units

835±9

Softening point,

261±2

Moisture content, % w/w, not more than

0,1

Diethylene glycol (DEG) content, % w/w, not more than

0,8

Carboxyl end groups, mmol/kg, not more than

30

Titanium dioxide content, % w/w

0,020±0,005

Thermal oxidative breakdown activation energy, kJ/mol, not less than

148