Back to results
US 11,286,356 B2Granted
Method for fusing aramid/aramid fibres
AssigneeProionic GmbH
InventorsRoland Kalb, Burghardt Schmidt
Life of this patent
Estimating the term…
Abstract
A method for fusing aramid fibers, wherein a) at least one area of an aramid fiber is treated with an ionic liquid so that the aramid is partially dissolved, b) the aramid fiber is contacted via the dissolved area with another aramid fiber area with pressure being applied to the contact area, and subsequently c) the partially dissolved area of the aramid is re-coagulated.
Claims19
A method for fusing aramid fibers comprising:
- a) treating a first area of an aramid fiber with an ionic liquid to form an at least partially dissolved aramid fiber area,
- wherein the aramid fiber includes meta-aramid fiber or para-aramid copolymer fiber and is not para-aramid fiber,
- wherein the ionic liquid meets at least one of the following two criteria:
- i) α value<0.6 and β value>0.8;
- ii) difference of β value minus α value≥0.45,
- wherein the α value and β value are Kamlet-Taft solvent parameters;
- b) contacting the at least partially dissolved aramid fiber area with another aramid fiber area;
- and
- c) thereafter causing or allowing the least partially dissolved aramid fiber area to become re-coagulated so as adhere the first area of the aramid fiber to the other aramid fiber area.
6 more elements
A method for fusing aramid fibers comprising:
- a) treating at least one area of an aramid polymer fiber with an ionic liquid so that the aramid polymer is partially dissolved,
- wherein the ionic liquid meets at least one of the following two criteria:
- i) α value<0.6 and β value>0.8;
- ii) difference of β value minus α value≥0.45,
- wherein the α value and β value are Kamlet-Taft solvent parameters,
- wherein the ionic liquid is not 1-ethyl-3-methylimidazolium acetate;
- b) contacting the aramid fiber via the dissolved area with another aramid fiber area;
- and subsequently
- c) causing or allowing the partially dissolved area of the aramid polymer to become re-coagulated.
6 more elements
A method for fusing aramid fibers comprising:
- a) treating at least one area of an aramid fiber with an ionic liquid so that the aramid is partially dissolved,
- wherein the aramid fiber is meta-aramid fiber,
- wherein the ionic liquid meets at least one of the following two criteria:
- i) α value<0.6 and β value>0.8;
- ii) difference of β value minus α value≥0.45,
- wherein the α value and β value are Kamlet-Taft solvent parameters,
- b) contacting the aramid fiber via the dissolved area with another aramid fiber area, and
- c) thereafter causing or allowing the partially dissolved area of the aramid to become re-coagulated.
5 more elements
Dependencies are inferred from the claim text.