Description

A21C insulation blankets are used over the vacuum bag when it is required to slow the rate of heat transfer from the bag side of the part. Heavy, metallic tools have slow temperature rise rates in the autoclave (or oven), which can mean through-thickness temperature gradients within the part which could result in part quality problems. A21C insulation blankets can help solve this problem.

A21C: standard version is made using Bleeder Lease® C upper and lower covers with a thermal wool inner layer. The maximum use temperature for this version is 800°F (427°C).

A21C: silicone coated version is made with more durable, silicone rubber coated fiberglass upper and lower covers with a thermal wool inner layer. The maximum use temperature for this version is 450°F (232°C).

As each A21C is made to a specific customer configuration, robust grommets and tie down features can be built into the blankets to secure them to the tool during cure and provide a durable a reusable solution. An A21C can protect the vacuum bag from debris kicked up by autoclave or oven fans.

Benefits

• Slows rate of heat transfer to the bag side of the part.
• Even out thermal gradients caused by “hot spots” in the autoclave or the tool itself.
• Design to fit the part and tool to provide consistent, repeatable thermal protection.

Technical Data

Product Reference	Configuration	Maximum Use Temperature
A21C: Standard Version	Bleederlease C / Thermal Wool Fiberglass	800°F (427°C)
A21C: Silicone Coated	Silicone Coated Fiberglass / Thermal Wool Fiberglass	450°F (232°C)

Notes

• All A21C blankets are designed in CATIA to fit specific parts/tools. Other material types are possible.
Contact your Airtech representative to discuss your specific design requirements.
• The maximum use temperature is dependent upon the duration at maximum temperature and is process
specific, Airtech recommends testing prior to use.

Last updated : 2018-04-19

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.