For release, the Breathers and Bleeders fabric includes a light layer of polytetrafluoroethylene (PTFE). It is a non-woven polyester or nylon fabric and is designed to allow airflow during the vacuum bagging process as well as bleed away excess resin in a composite part. It enables excellent adherence around a composite item when under vacuum or autoclave pressure.

At Airtech, breather fabric is available as standard rolls, slit widths, or cut shapes as per your specifications. Our Breathers and Bleeders fabrics allow the vacuum bagging process to continue smoothly and allow the resin to be bled out of composite parts, allowing great conformity throughout the bagging process.

The terms Breather and Bleeder are often used interchangeably. Functionally they are interchangeable, but the distinction is in use.Breather materials are used typically on top of a release film.

The purpose is to allow air under the bag to be evacuated during draw down, and continuously during cure. Any volatilespresent in the layup or generated during the cure can be removed as well.Most advanced composite materials in use currently are ‘net resin’ and do not require a Bleeder fabric.

However, there are legacy systems that do require Bleeder layers. Breather/Bleeders are available in various thickness and weights and material types. To fully explore the possibilities, review the Breathers and Bleeders section of the catalog and contact Airtech technical service engineers who are well versed in composite processes.

Name	Description	Maximum use temperature
Name NW 153	DescriptionMedium weight, non-woven polyester breather & absorption fabric	Maximum use temperature205°C
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Name NW 339 & NW 339HA	DescriptionHeavy weight, polyester breather & absorption fabric	Maximum use temperature205°C (400°F)
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Name Airweave® A	DescriptionBleeder/ breather	Maximum use temperature204°C
Name
Name Airweave® S	DescriptionVery light weight non-woven polyester breather/bleeder	Maximum use temperature204°C
Name
Name Airweave® SSFR	DescriptionVery light weight non-woven polyester breather/bleeder	Maximum use temperature204°C
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Name Airweave® N4 & N4 FR	DescriptionMedium weight non-woven polyester breather / bleeder	Maximum use temperature204°C (400°F)
Name
Name Airweave® N10 & N10FR	DescriptionHeavy weight non-woven polyester breather / bleeder	Maximum use temperature204°C (400°F)
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Name Airweave® Super 10 & Super 10 FR	DescriptionHeavy weight polyester breather with superior airflow	Maximum use temperature204°C (400°F)
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Name Airweave® Super 18 & Super 18 FR	DescriptionVery heavy weight non-woven polyester breather/bleeder	Maximum use temperature204°C (400°F)
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Name Ultraweave® 1032 & 1332	DescriptionNylon non-woven breathers/bleeders	Maximum use temperature232°C (450°F)
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Name Ultraweave® 606	DescriptionMedium weight nylon breather/bleeder	Maximum use temperature232°C
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Name Econoweave® 44 & 1010	DescriptionInexpensive polyester breathers/bleeders	Maximum use temperature190°C (375°F)
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Name Airweave® UHT 800	DescriptionNon-woven ultra high temperature fibreglass breather	Maximum use temperature427°C
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Name Airweave® UHT 300PGL & UHT 450PGL	DescriptionNon-woven fibreglass breathers for ultra high temperature	Maximum use temperature427°C (800°F)
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Name Stretch Flow 2000	DescriptionBreather for special applications	Maximum use temperature232°C
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Name Stretch Flow P 2000	DescriptionBreather for special applications	Maximum use temperature204°C
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Name Airpath MD	DescriptionExpandable monofilament sleeving	Maximum use temperature204°C
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Name Airtech Breathers at 7 bar	Description-	Maximum use temperature-
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Name FLASHPAC/STRETCHLEASE®	Description-	Maximum use temperature-
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