How is prepreg stored? How long is the shelf life?
Regardless of the type of prepreg, it should be stored in an environment of -18 ℃, such as an freezer or cold storage. To avoid moisture, the prepreg should be allowed to warm back to room temperature before opening the polyethylene bag (complete packaging may take 48 hours).
Generally speaking, the shelf life of prepregs stored at -18 ℃ is 12 months from the date of manufacture. The label of the prepreg packaging box is printed with the shelf life at -18 ℃ and room temperature shelf life. The adhesive life and external life at 23 ℃ vary depending on the resin and are specified in the relevant product data sheets.
definition
Shelf life: -18 ℃, maximum storage life in a sealed moisture-proof bag packaging state. The packaging label has an expiration date.
Adhesion life: The time during which the prepreg can maintain suitable adhesion at room temperature.
External lifespan: The maximum allowable accumulated time at room temperature between removal from the cold storage and curing.
Similar definitions
Storage life=operating life
Viscous life=operating life
External life=mechanical life
matters needing attention
Always support the prepreg through the axis.
Record the time when you are not in the cold storage.
After use, roll the prepreg tightly with tape to prevent wrinkling.
Seal the prepreg, place it in a box, and return it to the cold storage for storage.
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