Transformer Wrapping Insulation Milky White Mylar Film Polyester Electrical Tape

No.

Index

Unit

Index value

Result

1

Apparence

/

Surface flat and clean, no crepe, breakage, particle, bubble, pinhole and impurity. The side is regular and no breakage.

Standard

2

Roll

/

Around the tube core in tense, it’s not beyond side of roll. The thickness no tolerance and Hard infarction. Tolerance of width in roll not above ±2mm

Standard

3

Tube core

/

No off bits, collapse or skew in roll. it’s no effect to film and the property.

76mm

4

Width & Tolerance

MM

1000±2mm

1001mm

5

Thickness & Tolerance

MM

0.130±10%

MAX

MIN

Result

0.14

0.12

0.13

6

Tensile Strength

MD

Mpa

≥90

110

120

90

CD

90

70

85

7

Break Elongation

MD

%

≥70

85

72

80

CD

80

72

79

8

Shrinkage

MD

%

≤3.0

2.6

CD

2.4

9

Line Frequently Electrical Intensity

V/μm

≥60

65