6023(DB10) Polyester Film for Flyback Transformer(FBT)

Standard No.:Q/DJ₁₁-107-1999

6023（DB10）is biaxially oriented polyethelene terephthalate (PET) film.

6023（DB10） has good electrical insulating property, mechanical property, dimensional stability and flame resistance.

1 Technical requirements

1.1 Appearance

The film is supplied in tape form. Its surface should be flat and smooth. The film should be free of defects such as creases, laceration, dents, bubbles, holes, and contaminations. Edges of tapes must show clean cuts.

1.2 Thickness range and tolerance

Special requirements for thickness can be settled upon negotiation between sellers and buyers.

Recommended nominal thickness is as follows: 75μm , 100μm.

Thickness tolerance: ±3%

1.3 Diameter, width and deviation

Nominal width: 32mm、34mm、36mm、38mm、40mm

Special requirements for width can be settled upon negotiation between sellers and buyers. The film can be supplied in tape. The deviation of diameter and width is shown in Form 1

Form 1 The deviation of diameter and width mm

Width	Diameter	Deviation
		Width	Outside diameter of roll
＞15～50	≥180	±0.2	＜0.3

1.4 Splices and minimum length

There is no splice in each roll, the minimum length can be settled upon negotiation between sellers and buyers.

1.5 Property requirements

The main properties of product are as shown in Form 2

Form 2 Properties of film

No.	Properties			Units	Values
1	Tensile strength(MD and TD)			MPa	≥170
2	Elongation at break(MD and TD)			%	≥110
3	Shrinkage		MD	%	≤0.8
3	Shrinkage		TD	%	≤0.2
4	Power electric strength			V/μm	≥150
5	Volume resistivity			Ω·m	≥1.0×10¹⁴
6	Relative dielectric Constant (50Hz)				3.2±0.2
7	Dielectric dissipation factor (50Hz)				≤3.0×10^-3
8	Density			kg/m³	1400±10
9	Melting point			℃	≥258
10	Surface resistivity			Ω	≥1.0×10¹⁴
11	Flame resistance				94VTM-2
12	Dimensional stability in high temperature	With tension		℃	≥200
12	Dimensional stability in high temperature	With pressure		℃	≥200

2 Testing methods

2.1 Shrinkage

The period of treatment is 30min, and the temperature of treatment is 150℃±2℃.

2.2 Other items are as per Chapter 5 of GB 13950-1992.

3 Inspection, marks, package and storage

3.1 The product with the same lot resins, operators, processing condition and specifications is defined as a batch.

3.2 Inspecting items are as per the stipulation of Chapter 1 of this file.

3.3 Storage life: 18months under the condition of the temperature of 35℃ from the date of dispatch.

3.4 Other items should be in accordance with the relative stipulation of Chapter 6 and 7 of standard GB/T 13950—1992.

4 Remarks

4.1 The film is suitable for the flyback transformer of TV and computer display.

4.2 Avoid creases, scratches, contamination of dust and oil while being slit and/or used.