US2016194788A1PendingUtilityA1

Elastic monofilament

50
Assignee: TORAY INDUSTRIESPriority: Aug 9, 2013Filed: Aug 7, 2014Published: Jul 7, 2016
Est. expiryAug 9, 2033(~7 yrs left)· nominal 20-yr term from priority
Inventors:Nobuaki TanakaHiroshi TsuchikuraKota NakamuraHidetoshi SakaiTakuya Ryomoto
D01D 5/34D01F 8/14D01F 8/16
50
PatentIndex Score
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Claims

Abstract

An elastic monofilament includes a core-sheath composite structure, wherein a ratio of a core component is 2 to 40% by volume, the core component is a thermoplastic polyester having, in a polymer, 95 to 100% by mass of a thermoplastic polyester unit, and a sheath component is a copolymeric thermoplastic elastomer having a hard segment and a soft segment, and wherein the monofilament has a diameter of 0.1 to 1.0 mm, and a tensile strength of 0.3 to 3.0 cN/dtex.

Claims

exact text as granted — not AI-modified
1 .- 7 . (canceled) 
     
     
         8 . An elastic monofilament comprising a core-sheath composite structure, wherein a ratio of a core component is 2 to 40% by volume, the core component is a thermoplastic polyester having, in a polymer, 95 to 100% by mass of a thermoplastic polyester unit, and a sheath component is a copolymeric thermoplastic elastomer having a hard segment and a soft segment, and wherein the monofilament has a diameter of 0.1 to 1.0 mm, and a tensile strength of 0.3 to 3.0 cN/dtex. 
     
     
         9 . The elastic monofilament according to  claim 8 , wherein intrinsic viscosity (IV) of the thermoplastic polyester used in the core component is 0.7 or higher. 
     
     
         10 . The elastic monofilament according to  claim 9 , wherein the hard segment contains, as a main constituent unit, an aromatic polyester unit, and the soft segment contains, as a main constituent unit, an aliphatic polyether unit and/or an aliphatic polyester unit. 
     
     
         11 . The elastic monofilament according to  claim 10 , wherein the aromatic polyester unit is a polybutylene terephthalate unit, and the aliphatic polyether unit and/or the aliphatic polyester unit is a poly(tetramethylene oxide)glycol unit. 
     
     
         12 . The elastic monofilament according to  claim 8 , wherein a ratio of the hard segment to the soft segment is 35:65 to 75:25 (ratio by mass). 
     
     
         13 . The elastic monofilament according to  claim 8 , having a bending stiffness of 2.0 to 10 cN. 
     
     
         14 . The elastic monofilament according to  claim 8 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%. 
     
     
         15 . The elastic monofilament according to  claim 9 , wherein a ratio of the hard segment to the soft segment is 35:65 to 75:25 (ratio by mass). 
     
     
         16 . The elastic monofilament according to  claim 10 , wherein a ratio of the hard segment to the soft segment is 35:65 to 75:25 (ratio by mass). 
     
     
         17 . The elastic monofilament according to  claim 11 , wherein a ratio of the hard segment to the soft segment is 35:65 to 75:25 (ratio by mass). 
     
     
         18 . The elastic monofilament according to  claim 9 , having a bending stiffness of 2.0 to 10 cN. 
     
     
         19 . The elastic monofilament according to  claim 10 , having a bending stiffness of 2.0 to 10 cN. 
     
     
         20 . The elastic monofilament according to  claim 11 , having a bending stiffness of 2.0 to 10 cN. 
     
     
         21 . The elastic monofilament according to  claim 12 , having a bending stiffness of 2.0 to 10 cN. 
     
     
         22 . The elastic monofilament according to  claim 9 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%. 
     
     
         23 . The elastic monofilament according to  claim 10 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%. 
     
     
         24 . The elastic monofilament according to  claim 11 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%. 
     
     
         25 . The elastic monofilament according to  claim 12 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%. 
     
     
         26 . The elastic monofilament according to  claim 13 , wherein a rate of dimensional change when the monofilament is heat-treated for 3 minutes in a temperature condition of 160° C. under fixed length, and then retained for 12 hours under a tension of 0.1 cN/dtex is 0 to 5%.

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