PET, which stands for polyethylene terephthalate, is a type of polyester. The first manufacturer (DuPont) to produce PET film registered it as “Mylar,” which has resulted in “Mylar tape” almost becoming synonymous with PET tape.

Mylar tape possesses excellent electrical and physical properties. It is generally around 50-80μm thick. Mylar tape is primarily used as an insulating wrapping layer for coils, transformers, and electric motors. These applications require tape with a small thickness yet high electrical and tensile strength, making Mylar tape with a thickness below 100μm the preferred choice.

You-san Technology Mylar tape products are polyester tapes with high-performance PET film as the base material and coated with acrylic pressure-sensitive adhesive. They are mainly used for:

①Wrapping and bundling capacitors and wire coils

②Insulating and covering transformers and motor windings

③Insulation and high-temperature resistance in electronic and electrical applications

④High-voltage isolation in the circuit boards of switch mode power supplies

⑤Bundling between protective plates and battery cells in flexible lithium-ion batteries.

Transformer	Capacitor
Coil	Motor

Mylar tape has numerous advantages, including excellent insulation performance and good flame retardant properties, which make it a viable alternative to foreign brands.

 Mylar Tape Product Specification Table

Item	Testing Method	Units	Product Number
			P16055	P1608
Color	Visual Inspection	–	White, black, light yellow, dark yellow, blue, red, green, transparent	White, black, light yellow, dark yellow, blue, red, green, transparent
Adhesive	–	–	Acrylic	Acrylic
Backing	–	–	PET	PET
Backing Thickness	ASTM D-3652	mm	0.025	0.05
Total Thickness	ASTM D-3652	mm	0.055	0.08
Peel Strength（180°）	ASTM D-3330	N/inch（N/cm）	8（3.2）	8（3.2）
Tensile Strength	ASTM D-3759	N/inch（N/cm）	87.5（35）	225（90）
Elongation At Break	ASTM D-3759	%	70	70
Breakdown Voltage	ASTM D-1000	KV	≥3.5	≥3.5
Insulation Resistance	ASTM D-1000	Ω	1×1012	1×1012
Short-Term Temperature Resistance	GB∕T 32368-2015	℃	150	150
Long-Term Temperature Resistance	GB∕T 32368-2015	℃	120	120
Flame Retardant Grade	UL-510	–	UL-510	UL-510

Comparison Table of You-san Products and 3M Product Specifications

Product Code	Thickness	Base	Color	Backing Thickness	Adhesive	Peel Strength（N/cm）	Insulation Resistance	UL510	Tensile Strength（N/cm）	Elongation At Break
3M 1350F-1	0.063mm	PET	Yellow, White, Black	0.025mm	Acrylic	3.3	＞106	UL510 Certificate	44	100%
P16055	0.055mm	PET	White, black, light yellow, dark yellow, blue, red, green, transparent	0.025mm	Acrylic	3.2	＞106	UL510	35	70%
3M 1350F-2	0.088mm	PET	Yellow, White, Black	0.05mm	Acrylic	3.3	＞106	UL510 Certificate	88	110%
P1608	0.08mm	PET	White, black, light yellow, dark yellow, blue, red, green, transparen	0.05mm	Acrylic	3.2	＞106	UL510	90	70%

Note: Technical parameters for 3M products are sourced from 3M TDS technical data.