Description

A4000 LFST is a heat shrinkable lay-flat tube which has been oriented in the transverse direction. When exposed to heat 249 to 348°F (121 to 176°C) in a recirculating oven, tunnel oven or from a heat gun, the A4000 LFST material will shrink to closely fit the mandrel. A4000 LFST is ideal for providing a self-releasing cover for mandrels used in fabrication of hollow composite parts. A4000 release film is an approved material on all major aircraft specifications.

Benefits

• Prevents resin from bonding or attacking mandrel materials.
• Reduced labor hours for mandrel/ bladder clean up.
• Lowers extraction force required for mandrel/ bladder removal when used in combination with Airsock.

Technical data

		Test method
Material type	FEP
Elongation at break	300 %	ASTM D 882
Tensile strength	> 3045 psi (21 MPa)	ASTM D 882
Nominal shrinkage	15 %
Maximum use temperature	260°C (500°F)
Colour	Various
Shelf life	24 months from date of shipment when stored in original packaging at 22°C (72°F)

Sizes

Thickness	Width Before Shrinkage	Width After Shrinkage	Forms Available*
0.002 inch (50 µm)	2.82 inches (71.62 mm)	2.39 inches (60.71 mm)	LFT (Blue)
0.002 inch (50 µm)	3.59 inches (91.19 mm)	3.06 inches (77.72 mm)	LFT (Red)
0.002 inch (50 µm)	3.78 inches (96.01 mm)	3.29 inches (83.57 mm)	LFT (Red)

• A4000 LFST is an engineered product for each application. Size, thickness, and colour can be tailored
to specific requirements up to maximum size of 8 inches (20 cm LFT). This material may be slit and
provided in centerfold and sheeting forms.

Sustainability

Notes

• Minimums may apply, contact Airtech for application assistance.
• The maximum use temperature is dependent upon the duration at maximum temperature and is process
specific, Airtech recommends testing prior to use.

Last updated : 2025-02-24

As the conditions or methods of use, including storage, are beyond our control, Airtech International, Inc. does not assume responsibility for the performance of this material for any particular use. The material is sold "as is". Airtech International, Inc. disclaims, and buyer waives, any and all implied warranties, including without limitation the implied warranties of merchantability and of fitness for particular use. The information contained herein represents typical properties and should not be used for specification purposes. Any translation is provided for your convenience only. The official language is English and the official law is California, USA.