UNIPREG® Carbon non-crimp fabric prepreg 150 g/m², width 50 cm

USA: width 19.69", weight 4.42 oz/yd²

UNIPREG^® is a unidirectional epoxy carbon fibre prepreg that can be used wherever excellent mechanical and physical properties are required.

Pre-impregnated semi-finished products, so-called prepregs, offer maximum performance and a very wide range of applications, especially for complex components. Compared to other manufacturing processes, they anticipate a decisive step in the production of composite materials: the uniform impregnation of the fibre by the matrix. This achieves maximum mechanical performance on the one hand and very efficient component production on the other. In addition, the user is spared the time-consuming impregnation process with resins.

The epoxy resin provides the best possible adhesion between the fibre and the matrix in the composite.

• All filaments lie absolutely parallel (no thread grid) and are therefore optimally aligned
• The thickness of the prepreg is constant across the width
• All physical parameters have a very strict tolerance

Application: Excellent suitability for structural components.

Processing:
The prepreg is slightly sticky when uncured. It is therefore provided with protective covers on both sides to prevent the layers from sticking together unintentionally. The prepreg consists of silicone paper (white in the picture) and an embossed polyester film (blue in the picture).
Cut the prepreg to size for processing. Only then peel off the white silicone paper and place the prepreg into the mould with the sticky side down. As soon as it lies correctly, the embossed blue foil is peeled off the backside. In this way, several prepreg layers can be glued together as a "stack". Removal of the blue film is facilitated if it is briefly sprayed with freezer spray (Item no. 160126KS, see accessories below) .
Curing then takes place under pressure (vacuum presses with foils) and heat (see below, "UNIPREG Technical Data Sheet").

Fibre: Panex^® 35 50k

Technical data of the fibre:
Tensile strength: 4137 MPa
Tensile modulus: 242 GPa
Elongation at break: 1.5 %
Density: 1.81 g/cm³
Filament diameter: 7.2 μm

Technical data of the non-crimp fabric:
Areal weight (dry): 150 g/m²
Curing temperature: 80 - 150 °C (176 - 302 °F)
Glass transition temperature (Tg): 70 - 140 °C (158 - 284 °F)
Prepreg weight: 234 g/m² (6.9 oz/yd²)
Resin type: Epoxy
Resin content: 36 %
Laminate thickness: 0.15 mm (+/- 2.5 %)

Width: 50 cm

Typical properties of Unipreg^® laminate (curing at 80 - 150 °C (176 - 302 °F), see technical datasheet):
Tensile strength (EN ISO 527-4): 1800 MPa
Tensile modulus (EN ISO 527-4): 139 GPa
Flexural strength (EN ISO 14125): 1670 MPa
Flexural modulus (EN ISO 14125): 115 GPa
ILS strength (EN ISO 14130): 73 MPa
Density (EN ISO 1183): 1.57 g/cm³

In order to always deliver high-quality and "fresh" goods, we not only pay attention to short procurement times but also store the prepregs at -18 °C in a specially designed cold store until delivery.

Storage:
At -18 °C: 18 months
At 20 °C: 4 months

Technician Tip
(Application engineer at R&G)

The prepreg normally hardens in 60 minutes at 120 °C. If the temperature is 10 °C lower, the curing time is doubled.

In practice, the times are as follows:

at 110 °C - 2 hours
at 100 °C - 4 hours
at 90 °C - 8 hours
at 80 °C - 16 hours (80 °C is the minimum temperature for the prepreg)

The curing time also depends on the ambient conditions, including the heat distribution. The time only starts when all areas of the prepreg have reached the temperature.

The air in the oven is a very poor conductor of heat; it takes some time for the mould and the prepreg component to reach the required temperature.

This product cannot be returned or exchanged because there is a risk that the cold chain will be interrupted for too long. This will greatly shorten the shelf life of the prepreg or even render the material unusable. We ask for your understanding.

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