1. An inkjet recording head, which comprises a nozzle having: a hole for discharging a recording liquid including an ink; and a portion capable of repelling the ink at the periphery of the hole,
wherein the portion comprises a cured film formed from a composition comprising a block copolymer, and the block copolymer comprises: a block polymer (A) comprising a fluorine-containing polymer; and a block polymer (B) comprising a repeating unit having a siloxane structure,
wherein the fluorine-containing polymer comprises at least one of a polymeric unit represented by formula (FI), a polymeric unit represented by formula (FII) and a polymeric unit represented by formula (FIII):
\u2003wherein R0 represents a perfluoroalkyl group having from 1 to 8 carbon atoms, or an \u2014ORf1 group; and the Rf1 group represents a fluorine-containing aliphatic group having from 1 to 30 carbon atoms,
\u2003wherein R1 and R2 are the same of different and each represents a fluorine atom or a \u2014CvF2v+1 group; v represents an integer of from 1 to 4; a represents 0 or 1; b represents an integer of from 2 to 5; and c represents 0 or 1, and
wherein R3 and R4 each represents a fluorine atom or a \u2014CF3 group; a represents the same as in formula (FII); d represents 0 or 1; k represents an integer of from 0 to 5; 1 represents an integer of from 0 to 4; m represents 0 or 1; and (k+1+m) represents an integer in the range of from 1 to 6.
2. The inkjet recording head according to claim 1, wherein
at least one of the block polymer (A) and the block polymer (B) comprises a repeating unit having a reactive group capable of contributing to crosslinking reaction; and
the composition further comprises at least one of a curing agent and a curing accelerator.
3. The inkjet recording head according to claim 2, wherein the reactive group is at least one of a radical polymerizable group and a cationic polymerizable group.
4. The inkjet recording head according to claim 1, wherein the cured film comprises an inorganic particle having a mean particle size smaller than a thickness of the cured film.
5. The inkjet recording head according to claim 1, wherein the nozzle has an underlying surface coated by the composition, wherein the underlying surface has a surface irregularity based on JIS B0601-1994 such that:
an arithmetical mean roughness (Ra) is not more than 0.5 \u03bcm;
a ratio (RaRz) of the arithmetical mean roughness (Ra) to a ten-point mean roughness (Rz) is 0.1 or more;
a maximum height (Ry) is not more than 0.5 \u03bcm; and
a mean space of the surface irregularity (Sm) is from 0.005 to 1 \u03bcm.
6. The inkjet recording head according to claim 1, wherein the nozzle has an interlayer between the cured film and a substrate of the inkjet recording head.
7. The inkjet recording head according to claim 1, wherein the portion capable of repelling the ink satisfies a condition that after the portion has a saturated charge amount by applying to an electrostatic field, the period that the portion gets to have a half amount of the saturated charge amount is not longer than 60 seconds.
8. The inkjet recording head according to claim 1, wherein the portion capable of repelling the ink is on an outer surface of the nozzle.
9. An inkjet recording device, which comprises an inkjet recording head according to claim 1.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A combustion gas supply control device in a combustion gas generator,
said combustion gas generator comprising:
a motor case;
a first propellant loaded within said motor case to burn at a first pulse;
a second propellant loaded within said motor case to burn at a second pulse subsequent to said first pulse;
a front motor head fixed to a front portion of said motor case and having a combustion gas exhaust hole; and
a rear motor head fixed to a rear portion of said motor case and having a combustion gas exhaust hole,
wherein said combustion gas supply control device is configured to prevent combustion gas of said first propellant at said first pulse from flowing into said combustion gas exhaust hole of said front motor head and is configured to supply combustion gas of said second propellant at said second pulse to said combustion gas exhaust hole of said front motor head, and
wherein said combustion gas exhaust hole of said front motor head is configured to exhaust said combustion gas of said second propellant separately from said combustion gas exhaust hole of said rear motor head.
2. The combustion gas supply control device according to claim 1, further comprising a barrier membrane disposed within said motor case to isolate said first propellant and said second propellant from each other,
wherein said barrier membrane is disposed such that said combustion gas exhaust hole of said front motor head is located on a side of said second propellant and isolated from said first propellant.
3. The combustion gas supply control device according to claim 1, further comprising:
a barrier membrane holding structure disposed at the front portion of said motor case and having a combustion gas supply channel through which an inside of said motor case and said combustion gas exhaust hole of said front motor head are connected; and
a barrier membrane disposed within said motor case to isolate said first propellant and said second propellant from each other and fixed to said barrier membrane holding structure,
wherein said barrier membrane is disposed such that said combustion gas supply channel is located on a side of said second propellant and isolated from said first propellant.
4. The combustion gas supply control device according to claim 2,
wherein, at said second pulse, said barrier membrane is configured to break and both said combustion gas exhaust hole of said front motor head and said combustion gas exhaust hole of said rear motor head are configured to exhaust said combustion gas of said second propellant.
5. The combustion gas supply control device according to claim 3,
wherein, at said second pulse, said barrier membrane is configured to break and both said combustion gas exhaust hole of said front motor head and said combustion gas exhaust hole of said rear motor head are configured to exhaust said combustion gas of said second propellant.
6. The combustion gas supply control device according to claim 2, further comprising an igniter for said second propellant,
wherein said igniter is disposed at an end surface of said second propellant, and said igniter and a whole of an initial burning surface of said second propellant are covered by said barrier membrane.
7. The combustion gas supply control device according to claim 3, further comprising an igniter for said second propellant,
wherein said igniter is disposed at an end surface of said second propellant, and said igniter and a whole of an initial burning surface of said second propellant are covered by said barrier membrane.
8. A combustion gas supply control device in a combustion gas generator,
said combustion gas generator comprising:
a motor case;
a first propellant loaded within said motor case to burn at a first pulse;
a second propellant loaded within said motor case to burn at a second pulse subsequent to said first pulse;
a front motor head fixed to a front portion of said motor case and having a combustion gas exhaust hole; and
a rear motor head fixed to a rear portion of said motor case and having a combustion gas exhaust hole,
wherein said combustion gas supply control device is configured to prevent combustion gas of said first propellant at said first pulse from flowing into said combustion gas exhaust hole of said front motor head and is configured to supply combustion gas of said second propellant at said second pulse to said combustion gas exhaust hole of said front motor head, and
wherein said combustion gas exhaust hole of said front motor head is configured to exhaust said combustion gas of said second propellant in a first direction and said combustion gas exhaust hole of said rear motor head is configured to exhaust said combustion gas of said second propellant in a second direction, the second direction being different from the first direction.
9. The combustion gas supply control device according to claim 8, further comprising a barrier membrane disposed within said motor case to isolate said first propellant and said second propellant from each other,
wherein said barrier membrane is disposed such that said combustion gas exhaust hole of said front motor head is located on a side of said second propellant and isolated from said first propellant.
10. The combustion gas supply control device according to claim 8, further comprising:
a barrier membrane holding structure disposed at the front portion of said motor case and having a combustion gas supply channel through which an interior of said motor case and said combustion gas exhaust hole of said front motor head are connected; and
a barrier membrane disposed within said motor case to isolate said first propellant and said second propellant from each other and fixed to said barrier membrane holding structure,
wherein said barrier membrane is disposed such that said combustion gas supply channel is located on a side of said second propellant and isolated from said first propellant.
11. The combustion gas supply control device according to claim 9,
wherein, at said second pulse, said barrier membrane is configured to break and both said combustion gas exhaust hole of said front motor head and said combustion gas exhaust hole of said rear motor head are configured to exhaust said combustion gas of said second propellant.
12. The combustion gas supply control device according to claim 10,
wherein, at said second pulse, said barrier membrane is configured to break and both said combustion gas exhaust hole of said front motor head and said combustion gas exhaust hole of said rear motor head are configured to exhaust said combustion gas of said second propellant.
13. The combustion gas supply control device according to claim 10, further comprising an igniter for said second propellant,
wherein said igniter is disposed to ignite said second propellant through said combustion gas supply channel.
14. The combustion gas supply control device according to claim 9, further comprising an igniter for said second propellant,
wherein said igniter is disposed at an end surface of said second propellant, and said igniter and a whole of an initial burning surface of said second propellant are covered by said barrier membrane.
15. The combustion gas supply control device according to claim 10, further comprising an igniter for said second propellant,
wherein said igniter is disposed at an end surface of said second propellant, and said igniter and a whole of an initial burning surface of said second propellant are covered by said barrier membrane.
16. A combustion gas supply control device in a combustion gas generator,
said combustion gas generator comprising:
a motor case;
a first propellant loaded within said motor case to burn at a first pulse;
a second propellant loaded within said motor case to burn at a second pulse subsequent to said first pulse;
a front motor head fixed to a front portion of said motor case and having a combustion gas exhaust hole; and
a rear motor head fixed to a rear portion of said motor case and having a combustion gas exhaust hole,
wherein said combustion gas supply control device is configured to prevent combustion gas of said first propellant at said first pulse from flowing into said combustion gas exhaust hole of said front motor head and is configured to supply combustion gas of said second propellant at said second pulse to said combustion gas exhaust hole of said front motor head,
wherein said combustion gas supply control device comprises an igniter for said second propellant; a barrier membrane holding structure disposed at the front portion of said motor case and having a combustion gas supply channel through which an inside of said motor case and said combustion gas exhaust hole of said front motor head are connected; and a barrier membrane disposed within said motor case to isolate said first propellant and said second propellant from each other and fixed to said barrier membrane holding structure,
wherein said igniter is disposed to ignite said second propellant through said combustion gas supply channel, and
wherein said barrier membrane is disposed such that said combustion gas supply channel is located on a side of said second propellant and isolated from said first propellant.