Protection sleeve

tubularfor pipescarbon fiber

Product Overview
BSTFLEX Unidirectional Carbon Fiber Sleeve positions the main carbon fiber yarns along the length of a tubular preform. Finer supporting yarns maintain the sleeve's shape while it is placed over a mandrel or part. The construction enables axial reinforcement placement around tubes or parts with changing cross sections without forming a flat fabric into a tube. Supplied as a dry textile reinforcement, final laminate properties depend on the complete layup, resin system and cure cycle.

Designed Around the Load Direction
For components that require carbon fibers running end-to-end, a unidirectional sleeve provides a tubular means to place principal yarns in the 0-degree (axial) direction. Supporting yarns stabilise the textile geometry but are not a substitute for designed circumferential or torsional reinforcement. Laminate designs commonly combine axial sleeves with other fiber orientations where loading requires them. Select the sleeve considering actual part geometry, load case, resin and cure schedule; mechanical performance cannot be specified from the dry sleeve alone.

Fit on Straight and Shaped Parts
The tubular form can be trial-fitted over straight sections, tapers and transitions. A nominal sleeve diameter does not alone determine installed fit: supporting-yarn construction, mandrel profile and placement tension also influence fit. For parts with multiple diameters, a physical fit trial confirms coverage and cut length before production.

Where It Can Be Used

• Axial reinforcement in composite tubes, shafts and hollow profiles
• Layup over tapered mandrels or parts with changing cross sections
• Local lengthwise reinforcement in industrial and sporting equipment components
• Prototype and repeat-production composite assemblies requiring a tubular preform

Information to Specify
Provide the following to obtain an accurate quotation:

• Carbon yarn grade or tow size (if controlled by your design)
• Nominal and installed diameters
• Required fiber weight (g/m or specified unit)
• Supporting-yarn requirements
• Roll or cut length
• Desired packaging
• Whether the sleeve will be laid over a bare mandrel or another reinforcement layer
• Intended resin system and cure process

Choose the Fiber Architecture That Fits the Part
Sleeve | Principal fiber direction | Selection starting point
Unidirectional Carbon Fiber Sleeve | Along the part | Carbon reinforcement in the axial direction
Carbon Fiber Braided Sleeves | Crossing braid directions | Biaxial tubular reinforcement
Unidirectional Glass Fiber Sleeve | Along the part | Axial reinforcement using glass fiber

Questions from Composite Buyers
Is this a finished carbon fiber tube? No. This product is a dry carbon fiber sleeve intended for subsequent composite processing; it requires appropriate resin infusion/impregnation and a validated layup and cure.
Can it replace a biaxial carbon fiber braid? That depends on the load case. The two constructions place principal fibers in different directions; designs needing hoop or torsional reinforcement may require additional plies or different architectures.
What should I send for a custom sample? Send a drawing or sample, full diameter profile, finished length, carbon yarn requirement, target fiber weight, resin process and trial quantity. Include annual demand if you need an OEM supply quotation.

Technical specifications

• Brand: BSTFLEX
• Model / Series: BSTFLEX
• Product type: Unidirectional carbon fiber tubular sleeve (dry textile reinforcement)
• Form supplied: Tubular preform, supplied dry for subsequent resin impregnation and curing
• Principal fiber direction: Axial (along the part)
• Typical application: Axial reinforcement for tubes, shafts, hollow profiles, tapered sections and shaped components
• MOQ (order): 1
• Notes: Final mechanical properties depend on laminate design, resin system and cure schedule; supporting yarns stabilise shape but do not replace designed circumferential/torsional reinforcement