Magnetic recording tape having resilient substrate
View Patent ↗A magnetic recording tape, in accordance with one approach, includes a substrate comprising a poly ether ether ketone (PEEK). An underlayer is positioned above the substrate. A recording layer is positioned above the underlayer. A tape cartridge, in accordance with one approach, includes a housing and a magnetic recording tape at least partially stored in the housing. The magnetic recording tape includes a substrate comprising a poly ether ether ketone (PEEK), an underlayer above the substrate, and a recording layer above the underlayer.
1. A magnetic recording tape, comprising:
a substrate comprising a poly ether ketone (PEEK);
an underlayer above the substrate; and
a recording layer above the underlayer,
wherein a chain length of the PEEK is greater than about 20.
2. The magnetic recording tape as recited in claim 1 , wherein a chain length of the PEEK is about 50 to about 100.
3. The magnetic recording tape as recited in claim 1 , wherein a tensile storage modulus of the substrate as measured by dynamic thermal mechanical analysis is in a range of about 4 GPa to about 20 GPa.
4. The magnetic recording tape as recited in claim 1 , wherein a tensile storage modulus of the substrate as measured by dynamic thermal mechanical analysis is in a range of about 5.5 GPa to about 12 GPa.
5. A magnetic recording tape, comprising:
a substrate comprising a poly ether ether ketone (PEEK);
an underlayer above the substrate; and
a recording layer above the underlayer,
wherein crystalline regions of the substrate are generally aligned with one another,
wherein a chain length of the PEEK is greater than about 20.
6. The magnetic recording tape as recited in claim 1 , wherein a thickness of the substrate is in a range of about 2.5 microns to about 8 microns.
7. The magnetic recording tape as recited in claim 1 , wherein a thickness of the substrate is in a range of about 3 microns to about 4.5 microns.
8. The magnetic recording tape as recited in claim 1 , wherein the underlayer is grafted to the substrate.
9. The magnetic recording tape as recited in claim 1 , wherein no adhesive is present between the underlayer and the substrate.
10. A tape cartridge, comprising:
a housing; and
a magnetic recording tape at least partially stored in the housing,
the magnetic recording tape comprising:
a substrate comprising a poly ether ether ketone (PEEK),
an underlayer above the substrate, and
a recording layer above the underlayer,
wherein a chain length of the PEEK is greater than about 20.
11. The tape cartridge as recited in claim 10 , wherein a chain length of the PEEK is about 50 to about 100.
12. The tape cartridge as recited in claim 10 , wherein a tensile storage modulus of the substrate as measured by dynamic thermal mechanical analysis is in a range of about 4 GPa to about 20 GPa.
13. The tape cartridge as recited in claim 10 , wherein a tensile storage modulus of the substrate as measured by dynamic thermal mechanical analysis is in a range of about 5.5 GPa to about 12 GPa.
14. The tape cartridge as recited in claim 10 , wherein crystalline regions of the substrate are generally aligned with one another.
15. The tape cartridge as recited in claim 10 , wherein a thickness of the substrate is in a range of about 2.5 microns to about 8 microns.
16. The tape cartridge as recited in claim 10 , wherein a thickness of the substrate is in a range of about 3 microns to about 4.5 microns.
17. The tape cartridge as recited in claim 10 , wherein the underlayer is grafted to the substrate via a mechanism created by radiation-induced grafting.
18. The tape cartridge as recited in claim 10 , wherein no adhesive is present between the underlayer and the substrate.
19. The tape cartridge as recited in claim 10 , comprising a nonvolatile memory coupled to the housing.