PAP

TYPE

Multilayer Pipe

Overlapped welded

A (PE-AL-PE)

B1 (PEX-AL-PEX)

B (PERT-AL-PERT)

C (PE-AL-PE)

Roughness (mm)

0.0007

0.0007

0.0007

0.0007

Melting point (℃)

135

－

127

127

Density (g/cm³)

0.941-0.959

0.926-0.959

0.926-0.940

0.941-0.959

Modulus of elasticity (MPa)

7200

7200

7200

7200

Thermal conductivity (w/mK)

0.45

0.45

0.45

0.45

Coefficient of thermal expansion (mm/mK)

0.025

0.025

0.025

0.025

Material

Test item

Requirement

Polyethylene

Density

HDPE: 0.941~0.959 g/cm³ MDPE: 0.926~0.941 g/cm³

(PEX)

Melt flow index

HDPE, MDPE≥0.1 g/10min (190, 2.16kg)

Tensile strength

HDPE≥21MPa; MDPE≥14MPa

Enlongation

≥400%

Vicat soft point

Vicat soft point≥105℃

Cross-linking degree

≥65%

ESCR

≥165h

Color masterbatch

Moisture content

≤0.15%

Appearance

Uniform granual

Volatile content

≤0.5%

catalyst

Density

≥0.93 g/cm3

Melt flow index

≥0.9 g/10min (190℃, 5.00kg)

Volatile content

≤0.35%

Adhesive resin

Appearance

Uniform granual

Density

≥0.926 g/cm³

Melt flow index

2.0~6.0 g/10min (190℃, 2.16kg)

Vicat soft point

Vicat soft point≥105℃

T peeling strength

≥70N/25mm

Aluminum

Surface quality

Water brush test≥class

Tensile strength

105MPa～125MPa

Appearance

Without oil on surface

Hardness (HV)

28～33

T peeling strength

Minimum value≥60N/25mm