Description

OOA Beta Prepreg is a new benzoxazine formulation that allows autoclave and out of autoclave (OOA) processing. OOA Beta Prepreg offers long term storage at room temperature. OOA Beta Prepreg has low resin shrinkage during cure and has a high glass transition temperature.

OOA Beta Prepreg TMBG-3 is a light weight prepreg for surface plies.

OOA Beta Prepreg TMBG-6 is a medium weight prepreg used for cauls and tools that are post machined.

OOA Beta Prepreg TMBG-12 is a heavy weight prepreg that can be used in conjunction with the two prepregs above or alone for tools that are post machined.

Benefits

• OOA Beta Prepregs can be processed outside of the autoclave.
• Longer prepreg outlife allows for easy shipping and less time spent shuttling material in and out
freezers and more time spent on actually fabricating the mold.
• Outstanding toughness for long life in the composite shop environment.
• Low resin shrinkage improves surface finish and reduces need for finishing.
• Low moisture absorption eliminates tool drying after storage and reduces risk of porosity
in parts.

Technical data

Physicals	OOA TMBG-3	OOA TMBG-6	OOA TMBG-12
Description	Light Weight	Medium Weight	Heavy Weight
Fibre / Yarn Type	Carbon / 3K	Carbon / 6K	Carbon / 12K
Weave Style	2 x 2 Twill	2 x 2 Twill	2 x 2 Twill
Fibre Areal Weight	193 g/m²	365 g/m²	644 g/m²
Resin Content	37 +/- 3 %	37 +/- 3 %	37 +/- 3 %
Nominal Cured Ply Thickness	0.28 mm	0.36 mm	0.66 mm
Service Temperature	218°C	218°C	218°C
Glass Transition Temperature	232°C	232°C	232°C
Shrinkage	< 0.2 %	< 0.2 %	< 0.2 %

Shelf Life

6 months at 22°C, 18 months at -17°C from date of shipment when stored in original packaging.

Sizes

Product Reference	Width	Length	Minimum Order Quantity
OOA TMBG-3, OOA TMBG-6	127 cm	45.7 m	1 roll
OOA TMBG-12	127 cm	2.8 m	1 roll

• Roll lengths may vary +/- 5 % pending stock availability.

Bagging Instruction for Debulking and Curing

DEBULK 1st Ply
• Apply a 5.08 cm wide strip of Teflease® MG2 tape around perimeter of the laminate.
• Apply Release Ease® 234 TFP-1 over entire laminate to edge.
• Cover with Wrightlon® 5200 50 µm release film to 6 mm beyond edge of laminate,
   seal edge with Tefelease® MG2.
• Perforate using a small diameter pin on approximately 127 mm centers in a grid pattern.
• Cover with Airweave® N4 as breather. Ultraweave® 606 is an alternate.
• Apply Airtech vacuum bag, apply full vacuum for 30 minutes.
• In oven heat at 5° per minute to 143°C + 3. Hold for 40 minutes, with vacuum.
Cool to room temperature under full vacuum, remove bagging materials.

DEBULK
• Apply a 5.08 cm wide strip of Teflease® MG2 tape around the perimeter of the laminate.
• Apply Release Ease® 234 TFP over entire laminate surface to edge on model face.
• Apply 5.08 cm wide strip of Teflease® MG2 tape over the edge and down to the model surface with
   no bridging.
• Place an edge dam around the perimeter to the height of the laminate – Sildam / Airpad / Airdam.
• Cover with Wrightlon® 5200 50 µm release film to 6 mm beyond edge
   of laminate.
• Perforate using a small diameter pin on approximately 127 mm centers in a grid pattern.
• Cover with Airweave® N4 as breather. Ultraweave® 606 is an alternate.
• Apply Airtech vacuum bag, apply 10 in hg vacuum for 10 minutes.

CURE
• Apply a 5.08 cm wide strip of Teflease® MG2 tape around the entire perimeter of the laminate.
• Apply Release Ease® 234 TFP over entire laminate surface to the edge on model face.
• Apply 5.08 cm wide strip of Teflease® MG2 tape over the edge and down to the model surface with
   no bridging
• Place an edge dam around the perimeter to the height of the laminate – Sildam / Airpad / Airdam.
• Apply Airdam 1 against the outside edge of the Dam.
• Cover with Wrightlon® 5200 50 µm release film to 6 mm beyond edge
   of laminate.
• Perforate using a small diameter pin on approximately 127 mm centers in a grid pattern.
• Cover with Airweave® N4 as breather. Ultraweave® 606 is an alternate.
• Apply Airtech vacuum bag, leak check under full vacuum. Ensure the bagged assembly does not leak more
   than 2 in Hg in 10 minutes.
• Hold under full vacuum for 2 hours and proceed to oven cure.

Cure Instructions for 6mm Laminates

Cure Instructions for > 6mm Laminates

Post Cure Instructions

Post Machining

• PCD (Polycrystalline Diamond) cutting tools are recommended for post machining of TMBG OOA laminates.
Contact Airtech technical support for further information.

Notes

• Temperature measurements should be obtained with thermocouples, properly placed for accurate
temperature readings. Program controller should follow lagging thermocouple for cure and post cure.
• Contact Airtech to see our Beta Prepreg Fabrication Guide.
• To avoid condensation, allow prepreg from freezer to warm to room temperature before using.

Last updated : 2024-01-03

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.