China pet film production companies, polyester film manufacturer-Yuxing Film

Diffusion Base Film

CY20DH Pre-Coated Polyester Film

CY20DH is a transparent BOPET polyester film with easy adhesion and good recoating performance. It adheres to ink and resin and is mainly used as a pre-coated base film for brightness enhancement film, diffuser film, hard-coated film, IMD, and printing film applications requiring high adhesion performance.

5B adhesion

Easy adhesion

Good recoating

Transparent BOPET

Optical pre-coated base film

Product Model:

CY20DH

Key Highlights

Easy adhesion

Adheres to ink and resin, suitable for applications requiring high adhesion performance.

Good recoating performance

Provides excellent recoatability for subsequent coating layers without adhesion failure.

Optical transparency

Typical transmittance is about 90.18%-91.21%, suitable for optical film substrate applications.

Stable adhesion performance

Achieves consistent 5B rating across all thicknesses for reliable bonding.

Technology & Advantages

Optical films, hard-coated films, IMD, and printing films typically require transparent PET base films with good adhesion and recoating compatibility. Through pre-coating treatment, CY20DH provides an adhesion foundation for ink, resin, or downstream coatings.

Core Values

Adhesion support:
Achieves 5B adhesion test results across all thicknesses. Provides reliable bonding to ink, resin, and downstream coatings for demanding applications.

Optical compatibility:
High transmittance (90.18-91.21%) and low haze (1.40-5.31%) make it suitable for optical film substrates requiring clarity.

Processing compatibility:
Supports recoating, printing, hard coating, IMD, and related downstream processes with consistent performance and reliable adhesion.

Applications

Brightness enhancement film

Used as a pre-coated base film for brightness enhancement film.

Diffuser film

Used in diffuser film substrate applications.

Hard-coated film

Suitable as a substrate for hard coating.

IMD / printing film

Used in IMD and printing film applications requiring high adhesion.

Technical Specifications

Properties	Unit	Standard	Typical Value
Thickness	μm	GB/T 13542.2-2021	50 / 75 / 100 / 125 / 175 / 188 / 250 / 300 / 350 / 400 / 450
Tensile Strength - MD	MPa	GB/T 13542.2-2021	167 / 167 / 171 / 203 / 188 / 190 / 178 / 191 / 165 / 166 / 148
Tensile Strength - TD	MPa	GB/T 13542.2-2021	212 / 219 / 217 / 204 / 195 / 190 / 182 / 154 / 159 / 157 / 128
Elongation at Break - MD	%	GB/T 13542.2-2021	162 / 161 / 164 / 152 / 161 / 161 / 165 / 170 / 164 / 192 / 187
Elongation at Break - TD	%	GB/T 13542.2-2021	115 / 114 / 114 / 119 / 133 / 126 / 160 / 173 / 169 / 163 / 183
Heat Shrinkage @150°C, 30min - MD	%	GB/T 13542.2-2021	0.99 / 1.04 / 0.95 / 0.74 / 0.53 / 0.63 / 0.95 / 0.62 / 0.61 / 0.64 / 0.64
Heat Shrinkage @150°C, 30min - TD	%	GB/T 13542.2-2021	-0.05 / -0.09 / -0.10 / 0.14 / 0.09 / 0.06 / 0.12 / -0.11 / -0.12 / -0.10 / -0.12
Transmittance	%	ASTM D1003	91.12 / 91.17 / 91.21 / 91.10 / 91.04 / 90.61 / 90.55 / 90.18 / 90.35 / 90.27 / 90.43
Haze	%	ASTM D1003	1.40 / 1.43 / 1.69 / 1.65 / 1.70 / 1.74 / 1.97 / 3.80 / 4.46 / 4.89 / 5.31
Adhesion Test	-	ASTM D3359	5B

Remark: MD refers to machine direction and TD refers to transverse direction. All items are delivery inspection items. Values for non-recommended nominal thicknesses are obtained by interpolation.