Description
You can now get almost all the fabrics we stock pre-impregnated with resin. Prepregs make working with composite fabrics much easier and safer. No mixing of Resin and Hardener which can be very messy. Prepreg keeps the resin content perfect in your part and lets you make parts that are consistent to one another within a few grams.
Minimum Quantity is 10 continuous yards per fabric. Minimum width of a fabric to be pre-impregnated is 36″ and the maximum width is 60″.
The pricing for this service is in addition to the price of the fabric of your choice.
The standard prepreg resin used has the following specs:
- 250°F cure Resin
- impregnated with a 42% resin content.
- Coated on one single side
- Medium Tack
- Liner on Both Sides
Other Options available upon request:
- Low to High Tack
- Higher temp resins available up to 350° F
- Liner on single side or double
- Single or Double Sided coated
- Up to 50% resin content
- Black pigmented resin available at $2.5/yd upcharge @ Minimum of 50 yards
Shelf Life/Storage
- 0° F (standard freezer) – 1 Year
- 40° F (standard fridge) – six months
- 72° F (room temp) – 30 days.
It is suggested to store at 0° F or below to provide a longer shelf life. If you plan to use material faster, then you can store at a warmer temp to shorten the time it takes to get material to room temperature.
Cure time: Here is the cure schedule for a typical laminate (3-5 layers thick). On thicker laminates, you may want to slow the ramp time and hold the dwell time longer to ensure even heating throughout the part. Thermocouples on part will help you know actual part temperature and can speed up the curing process if needed.
- Dwell at 100° F for 15 min
- Ramp Up to 150° F @ rate of 3° F/min
- Dwell at 150° F for 30 min
- Ramp Up to 200° F @ rate of 3° F/min
- Dwell at 200° F for 30 min
- Ramp Up to 250° F @ rate of 3° F/min
- Dwell at 250° F for 1 Hour
- Ramp Down to 200° F @ rate of 3° F/min
- Dwell at 200° F for 30 min
- Ramp Down to 150° F @ rate of 3° F/min
- Dwell at 150° F for 30 min
- Ramp Down to 100° F @ rate of 3° F/min
- Finish
Application: Remove material from cold storage at least 20 hours prior to use so the material stabilizes at room temp. Keep the material wrapped to prevent moisture from condensing on the adhesive. Cut prepreg to the correct size, remove poly film from one side and apply to part or mold. Then remove the backing paper. Continue until the desired number of plies are obtained. When your lay-up is finished, you need to cure the material in a vacuum bag placed inside an oven or autoclave. Apply at least 10psi of pressure and 250° F for one hour.
Caution: This material contains epoxy resins and amines which may cause irritation to sensitive skin. Avoid contact with eyes or skin. If contact with skin occurs, wash as soon as possible with soap and water. If contact with eyes occurs, flush with water for 15 minutes. Do not handle or use this material until Material Safety Data Sheet has been read and understood. The user of this material is required to use the necessary protective equipment as directed by applicable state and federal laws when handling, curing, and grinding this material.
Shipping: This material should be shipped expedited airmail. Due to a short shelf life at room temp we suggest shipping this material via an expedited service such as UPS Overnight, 2-day or 3-day. These are guaranteed services. If these are chosen, we will ship the materials in the beginning of the week to ensure they do not sit in the shipping company warehouse over the weekend. We can send the material with insulation and ice-packs at an additional cost (add $26 for ice packs and insulation). It is suggested that you ship with ice packs and 2-day airmail at a minimum. If you plan to use material within days of arrival or are OK with loosing days of shelf life, you can select any shipping method you would like, however if our minimum suggested shipping method is not chosen, we will not be held responsible for issues with material.
Lead time for this service is approximately 3-4 weeks.*
All materials will ship on Monday-Wednesday only to avoid storage in shipping facility over the weekend (this would cause loss of shelf life) and Overnight/2-day or 3-day shipping services are suggested. Composite Envisions not held responsible for material if anything slower than 2-day is picked.
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