Film Specifications

Technical data for our general films (SK / SC / DC) and surface-tack films (SD). All values are typical, measured at 25 °C unless noted.

General Films

SK / SC / DC — General Series

Distinguished mainly by Shore A hardness and elastic modulus. SK is the softest and most elastic; DC has the highest strength and modulus and the widest range of sizes and thicknesses. All are transparent, pure solvent-free PDMS films.

Property	SK	SC	DC
Shore A hardness	30	42	50
Tensile strength (MPa)	4.0	4.2	6.5
Elongation at break (%)	220	180	120
Elastic modulus (MPa)	0.4	0.6	1.6

Tell us your application and we will recommend the grade.

Shared Properties

Common Across All Series

Typical physical and electrical properties for the SK / SC / DC families.

Light transmission

94% @ 2 mm

Refractive index

1.41

Density

1.02 g/cm³

Operating temperature

-45 ~ 200 ℃

Dielectric strength

20 kV/mm

Oxygen permeability (SK, 50 µm)

≈ 596 L O₂ per m² per day

596,449 cm³/(m²·24h·0.1MPa) · GB/T 1038.1-2022 · Report (2024)QSWJ04149

Dielectric constant (100 kHz)

2.7

Dielectric loss (100 kHz)

0.001

Volume resistivity

10¹⁵ Ω·cm

Cytotoxicity

None (biocompatible)

Gas permeability: the thinner the film, the faster the transmission, and each gas permeates at its own rate — oxygen, CO₂ and nitrogen are not the same. Tell us the gas species and the thickness you use and we will quote the figure. All values above are typical, not guaranteed specifications.

Surface tack

SD Series — Tack Levels

Cleanroom PDMS film with protective film on both faces: protective / PDMS (elastic) / polyester substrate / protective. Select by tack level (T0 low, T4 medium, T6 high) and thickness. Tack is the same on both faces — there is no front or back to distinguish in use.

Surface tack level	80 µm	200 µm	400 µm
T0 · low tack	√	√	√
T4 · medium tack	√	√	√
T6 · high tack	—	√	√

How to choose the tack level: T0 — low tack, for light parts and easy release; T4 — medium tack, the general-purpose level; T6 — high tack, for heavier parts or firm holding. Tell us the part weight and surface finish and we will recommend a level.

Standard & Custom

Thickness, Size & Roll

Standard off-the-shelf grades and the custom range we manufacture to.

Thickness grades (stock)

20 / 30 / 50 / 100 / 125 / 150 / 200 / 250 / 300 / 400 / 500 / 600 µm

Availability by grade

30 µm: DC & SC · 125 µm & 250 µm: SK only · others: SK / SC / DC

Above 600 µm (stock)

DC: 1 / 2 / 3 / 4 / 5 mm · SK: 1 mm, 2 mm · other grades to order

Outside stock range

10 µm & other thicknesses to order

Sheet size

200×150 / 200×300 mm

Sheet size (1.0–5.0 mm)

100×100 mm

Roll width (std)

300 mm

Roll width (max)

500 mm custom

Processing

Die-cutting / laser cutting

Minimum order

1 sheet

Stock dispatch

Same working day

Made to order

Lead time quoted per batch

Need a grade not listed? Tell us your thickness, size, surface tack and tolerance — we quote the film to your specification, minimum order one sheet.

Need a custom spec?

Send your target thickness, size and application. We reply with specification, price and lead time within 24 hours.

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