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Resin for a PC/PMMA alloy [SA256]

01Overview

SA256 is a PMMA that improves the commercial properties of PC. It is a product that maintains transparency after being compounded with PC, and which can improve the surface hardness and weather resistance that are weaknesses of PC.

Change in the properties of the material when SA256 is applied, compared to the existing PC

Overview image
02Applications

SA256 is used to create a PC compound and can be applied to the back covers and display windows of mobile phones,
and the housing of electric home appliances, where it can improve the surface hardness while maintaining the transparency of regular PC.

  • Applications image
  • Applications image
03Characteristics

SA256 has excellent optical properties compared to the general PMMA/PC material, due to forming a uniform morphology in the PC matrix by that improves the commercial properties of PC. It can also increase the surface hardness of PC to the H level, in the case of a 30% SA256 content.

  • Characteristics image

    PMMA + PC

  • Characteristics image

    SA256 + PC

Resin for a PC/PMMA alloy (SA256) Properties

Properties

PC
(Melt Flow Index 10*)

PC+SA256

SA256 contents(%)

0

20

25

30

Injection temperature(℃)

-

260

280

300

320

260

280

300

320

260

280

300

320

Properties

Item

Condition

Unit

Method

Optical Properties

Light Transmit tance

3mm

%

ISO
13468-1

90.3

90.8

90.9

90.8

90.2

90.6

90.6

90.2

89.8

90.9

90.9

90.3

89.6

Haze

3mm

-

ISO
14782

0.6

0.5

0.6

0.6

1.0

0.5

0.6

0.5

1.1

0.5

0.6

0.5

1.7

Thermal Properties

Melt Flow Index

230℃/
3.8kg

g/
10min

ISO
1133

1.6

3.0

3.2

3.9

VICAT
Softening Point

B/50

ISO
306

149

134

130

127

Mechanical Properties

Charpy Impact Strength

notched

kJ/m²

ISO
179

70

3.5

3.5

3.5

3.4

3

3

3

3

2.8

2.8

2.8

2.8

Unnotched

No Break

Rockwell
Hardness

M scale

-

ISO
2039-2

46

76

77

77

79

80

80

80

82

83

83

83

84

Pencil hardness

1kgf

-

ASTM
D3363

48

F

F

H

300℃, 1.2kgf condition

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