PP (Polypropylene)

- A universal-purpose plastic with low specific gravity and excellent hinge properties


● Overview

Many of the properties of PP (polypropylene) is similar to those of PE (polyethylene), but stress grinding properties, transparency, and the tensile strength for PE (polyethylene) is superior.

● Features

① Light weight property (belongs to the lowest group of specific gravity)
② Distinctive hinge property (resistant to repeated bending)
③ Food hygiene (conforms to Food Sanitation Law)
④ Withstands stress crushing
⑤ Good surface exterior (good surface gloss, not easily scratched)

- PP's most outstanding properties compared with other similar plastics are specific gravity, mechanical strength, bending fatigue resistance, heat resistance, electrical properties, chemical resistance, etc. Its light specific gravity is second to TPX and about 60% of PVC. Its mechanical strength being superior to HDPE, PP is a perfect material where yield point, tensile strength, compressive strength, elasticity modulus are required. It is chemically stable with the exception of sulfuric acid and nitric acid. PP has the same opaque milky white color as PE.

- The greatest feature of PP is its resistance to repeated bending and useful in making hinges (which is equivalent to the conventional joint coupling) in which the main body and the lid is molded altogether. It is unparalleled by any other industrial materials and plastics.

- Its defect compared with PE is vulnerability shock at a low temperature and ultraviolet rays. To complement this defect, a copolymer of synthetic rubber and PE is being developed.


● Dimension

PP Rods

Diameter(mm)

Tolerance(mm)

Length(mm)

L1000

L3000

15

+0.1 ~ +1.0

1000

3000

20

1000

3000

25

1000

3000

30

+0.2 ~ +1.5

1000

3000

35

1000

3000

40

+0.2 ~ +2.5

1000

3000

45

1000

3000

50

1000

3000

55

1000

3000

60

+0.5 ~ +3.0

1000

3000

65

1000

3000

70

1000

3000

75

1000

3000

80

1000

3000

85

1000

3000

90

+0.5 ~ +3.5

1000

3000

95

1000

3000

100

1000

3000

110

1000

3000

120

+1.0 ~ +4.5

1000

3000

130

1000

3000

140

1000

3000

150

+1.5 ~ +6.0

1000

3000

160

1000

3000

180

1000

3000

200

+2.0 ~ +7.0

1000

3000

210

1000

3000

250

1000

3000


PP Board

Thickness(mm)

Tolerance(mm)

Specifications

1000 X 2000

1200 x 2400

3

-0.2 ~ +0.3

1000 X 2000

1200 x 2400

4

1000 X 2000

1200 x 2400

5

1000 X 2000

1200 x 2400

6

-0.3 ~ +0.4

1000 X 2000

1200 x 2400

8

1000 X 2000

1200 x 2400

10

1000 X 2000

1200 x 2400

12

+0.1 ~ +1.5

1000 X 2000

1200 x 2400

15

1000 X 2000

1200 x 2400

20

+0.1 ~ +2.0

1000 X 2000

1200 x 2400

25

1000 X 2000

1200 x 2400

30

1000 X 2000

1200 x 2400

35

+0.8 ~ +4.0

1000 X 2000

1200 x 2400

40

1000 X 2000

1200 x 2400

45

1000 X 2000

1200 x 2400

50

+0.8 ~ +4.5

1000 X 2000

1200 x 2400

60

1000 X 2000

1200 x 2400

70

+1.0 ~ +8.0

1000 X 2000

1200 x 2400

80

1000 X 2000

1200 x 2400

100

1000 X 2000

1200 x 2400

110

+1 ~ +4

1000 X 2000

1200 x 2400

120

1000 X 2000

1200 x 2400

130

1000 X 2000

1200 x 2400

140

1000 X 2000

1200 x 2400

150

1000 X 2000

1200 x 2400



● Physical property

Varieties

PP

Items

Test Method
ASTM

Unit

specific gravity

D-792

G/㎠

0.91

Tensile strength

D-638

MPa
{kgf/㎠}

35
{360}

Elongation

D-638

%

30

Tensile Modulus

D-638

MPa
{kgf/㎠}

1177
{12}

Compressive strength

Yield point

D-695

MPa
{kgf/㎠}

-

5%Transformation (10%Transformation)

D-695

MPa
{4.6kgf/㎠}

49
{500}}

Flexural strength

D-790

MPa
{kgf/㎠}

-

Flexural modulus

D-790

MPa
{106kgf/㎠}

-

IZOD Notched Impact value

D-256

J/m{kgf•cm/
2.54cm}

39
{10}

Rockwell hardness

D-785

R-Scale

110

Shorer hardness

D-785

D type

77

Melting point

-

℃

120

Heat Deflection Temperature

0.445MPa
{4.6kgf / ㎠}

D-648

℃

105

1.820MPa
{18.6kgf / ㎠}

D-648

℃
℃

80

Continuous use temperature

-

℃

 

Coefficient of Linear Thermal Expansion

D-696

x105/℃

11

Absorption(Underwater, Equilibrium)
(Underwater, 24hrs)

D-570
D-570

%
%

0.01
0.01

Volume resistivity

D-257

Ω•m
{Ω•cm}

> 1014
{>1016}

Breakdown voltage
Permittivity 106Hz
Dielectric loss tangent106Hz

D-149
D-150
D-150

Kv/mm
-
-

-
-
-

Combustibility

(UL94)

-

HB

Chemical resistance

Oil
acid
Alkaline
Organic solvents

-
-
-
-

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