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

UV/Hydrolysis Resistan Film

CY25HTG48 Hydrolysis-Resistant PET Film for Solar Cell Backsheet

Transparent PET film with excellent electrical insulation, low WVTR, good coating processability, and excellent aging resistance. It passed UL, Germany TUV testing, and a 2500-hour DH test.

TUV

Solar backsheet

Weather resistance

Electrical insulation

Product Model:

CY25HTG48

Key Highlights

Certification

Passed UL, Germany TUV, and 2500-hour DH test, ensuring proven reliability and safety for solar backsheet applications.

Good lamination compatibility

Stable surface wetting tension supports common adhesives and lamination processes, helping improve interlayer bonding stability and processing flatness.

Technology & Advantages

Standard PET films may experience reduced mechanical performance, embrittlement, cracking, or lower insulation reliability under high-temperature, high-humidity, and long-term outdoor exposure conditions. It uses hydrolysis-resistant modification technology to improve material stability under damp-heat aging conditions, making it suitable for photovoltaic backsheet core layers requiring long-term reliability.

Core Values

Long-term reliability:
Helps backsheet structures withstand damp heat, UV exposure, temperature variation, and long-term outdoor service. Passed 2500-hour DH test for proven durability.

Processing compatibility:
Suitable for common lamination processes and adhesive systems used in mass production of backsheet materials with stable surface wetting tension.

Electrical safety:
Provides stable electrical insulation support for the protective function of photovoltaic backsheets, ensuring safe and reliable operation in outdoor environments.

Applications

Floating PV

High humidity and water vapor environments require stronger hydrolysis resistance.

Desert PV

High UV exposure and temperature variation require thermal and dimensional stability.

Rooftop PV

Long-term outdoor operation requires stable insulation safety and structural reliability.

Utility-Scale PV Plants

Suitable for module projects requiring consistency, stable supply, and long-term material performance.

Technical Specifications

Properties	Unit	Standard	Typical Value
Thickness	μm	GB/T 13542.2-2021	50 / 125 / 150 / 188 / 250 / 260 / 275 / 285
Thickness Tolerance	%	GB/T 13542.2-2021	±2
MD	MPa	GB/T 13542.2-2021	≥165 / ≥160 / ≥160 / ≥160 / ≥150 / ≥150 / ≥150 / ≥150
TD	MPa	GB/T 13542.2-2021	≥180 / ≥170 / ≥170 / ≥150 / ≥140 / ≥140 / ≥130 / ≥130
MD	%	GB/T 13542.2-2021	≥110 / ≥110 / ≥110 / ≥120 / ≥120 / ≥120 / ≥130 / ≥130
TD	%	GB/T 13542.2-2021	≥90 / ≥90 / ≥90 / ≥90 / ≥90 / ≥90 / ≥10 / ≥100
@150°C, 30min - MD	%	TDS	≤1.5 / ≤0.7
@150°C, 30min - TD	%	TDS	≤0.2
Wetting Tension	mN/m	GB/T 14216-2008	≥52
WVTR	g/(m2.24h)	GB/T 21529-2008	/ / 3.5 / 3.0 / 2.5 / 2.0 / 1.8
Electrical Strength	V/μm	GB/T 1408.1-2006	≥130 / ≥90 / ≥85 / ≥76 / ≥65 / ≥60
Light Transmittance	%	ASTM D1003	≥88
Haze	%	ASTM D1003	≤2.5 / ≤4.5 / ≤5.0 / ≤5.5 / ≤6.0 / ≤6.5
PCT	%	121°C, 100%RH, 2atm, 48h	>10

Remark: Parameters above are from the TDS. MD refers to machine direction and TD refers to transverse direction; where the TDS specifies type inspection or delivery inspection items, the original TDS shall prevail.

Packaging & Logistics

Storage Conditions

Store the product in a clean, dry, and ventilated place.

Storage Environment

Keep away from fire, heating sources, and direct sunlight.

Pallet

Fumigation-free wooden pallets suitable for export transportation.

Label Information

Each roll label includes model, batch number, thickness, width, net weight, and production date for traceability.

Slitting Range

Different slit widths can be supplied according to customer laminating equipment and production requirements.

Supply Note

Regular specifications support batch supply. Lead time depends on order specifications, quantity, and production schedule.

Frequently Asked Questions

Q: What is CY25HTG48 mainly used for?

A: It is mainly used in solar cell backsheet applications.

Q: What are the main features of CY25HTG48?

A: excellent electrical insulation, low WVTR, good coating processability, and excellent aging resistance. It passed UL, Germany TUV testing, and a 2500-hour DH test.

Q: Can other thicknesses be customized?

A: Yes. Other thicknesses can be customized according to the customer's specific requirements.

Q: Can samples be provided for testing?

A: Yes, samples or small rolls can be provided according to project requirements for lamination, laminating and performance validation tests.

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