WO2023286738A1 - Fibres de polyamide pour câble pour pneu et procédé de production de celles-ci - Google Patents

Fibres de polyamide pour câble pour pneu et procédé de production de celles-ci Download PDF

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Publication number
WO2023286738A1
WO2023286738A1 PCT/JP2022/027269 JP2022027269W WO2023286738A1 WO 2023286738 A1 WO2023286738 A1 WO 2023286738A1 JP 2022027269 W JP2022027269 W JP 2022027269W WO 2023286738 A1 WO2023286738 A1 WO 2023286738A1
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WO
WIPO (PCT)
Prior art keywords
less
dtex
polyamide fiber
tire
cord
Prior art date
Application number
PCT/JP2022/027269
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English (en)
Japanese (ja)
Inventor
浩介 井田
Original Assignee
旭化成株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 旭化成株式会社 filed Critical 旭化成株式会社
Priority to JP2023534794A priority Critical patent/JPWO2023286738A1/ja
Priority to CN202280049215.5A priority patent/CN117642531A/zh
Publication of WO2023286738A1 publication Critical patent/WO2023286738A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/48—Tyre cords

Definitions

  • a polyamide fiber is made into a twisted cord, and then treated with an adhesive (hereinafter also referred to as "dip"), and then the twisted cord is subjected to tension.
  • a method of tension heat treatment is known. Twisted yarn cords have been subjected to tension heat treatment at higher tensions in order to obtain reinforcing cords with higher strength and higher rigidity. By doing so, the strength after the dip treatment is increased, contributing to further weight reduction of the tire and making it possible to use the tire for higher load applications.
  • the room temperature (25°C) knot strength of the polyamide fiber for tire cord of the present embodiment is preferably 4.5 cN/dtex or more and 6.5 cN/dtex or less, more preferably 5.0 cN/dtex or more and 6.0 cN/dtex or less. More preferably, it is 5.2 cN/dtex or more and 5.8 cN/dtex or less.
  • the 25° C. knot strength is 4.5 cN/dtex or more, it is possible to suppress breakage of the cord under tension heat treatment.
  • the knot strength at 25° C. is 6.5 cN/dtex or less, the production can be carried out without significant decrease in process stability due to increase in fluff and yarn breakage.
  • the tensile strength of the polyamide fiber for tire cord of the present embodiment is preferably 8.7 cN/dtex or more and 11.0 cN/dtex or less, more preferably 9.0 cN/dtex or more and 10.5 cN/dtex or less, and still more preferably 9.0 cN/dtex or more and 10.5 cN/dtex or less. It is 4 cN/dtex or more and 10.2 cN/dtex or less.
  • the tensile strength is 8.7 cN/dtex or more, the tensile strength is excellent and contributes to the expression of the air knot strength and the knot strength.
  • the tensile strength is 11.0 cN/dtex or less, production can be carried out without significant deterioration in process stability due to increased fluff and yarn breakage.
  • the dimensional stability of the polyamide fiber for tire cords of the present embodiment is preferably 12% or more and 20% or less, more preferably 15% or more and 19% or less, and still more preferably 16% or more and 18% or less.
  • the dimensional stability can be determined from the sum of the boiling water shrinkage of the fiber and the intermediate elongation (elongation at a high load of 1/2 of the breaking strength).
  • the dimensional stability is 12% or more, the toughness in rubber reinforcement applications such as tire cords is improved.
  • the dimensional stability is 20% or less, it contributes to maintaining strength at high temperatures, is excellent in tensile strength at high temperatures, and contributes to the expression of air knot strength under a temperature of 180° C. and knot strength at 25° C. .
  • the coating amount of the finishing agent is less than 0.5% by weight, the effect of reducing frictional resistance (smoothness) between the extreme pressure property and the metal surface is insufficient, making it difficult to stably produce high-strength polyamide fibers.
  • the coating amount of the finishing agent exceeds 1.5% by weight, the penetration of the dipping liquid into the polyamide fiber is inhibited during the dipping treatment, resulting in a large decrease in adhesion to the rubber.
  • Disarrayed filaments include single yarns of twisted yarn cords that are loose or fluffed, which may cause thickness unevenness when made into a blind. Twisted filament turbulence was evaluated based on the following criteria for 1,000 twisted cords and 1,000 m. (Evaluation criteria) ⁇ : Filament disorder is less than 1.0; ⁇ : 1.0 or more and less than 5.0 filament disturbances; ⁇ : 5.0 or more but less than 10.0 filament disturbances; x: 10.0 or more filament disturbances.
  • Example 5 The same procedure as in Example 1 was carried out, except that the air supply energy was changed to 1.0 kW in the entangling step. The results are shown in Table 2 below.
  • Example 5 The procedure was carried out in the same manner as in Example 1, except that in the refueling step, a finishing agent containing no ionic surfactant was added so that the deposition rate was 1.1% by weight. The results are shown in Table 2 below.
  • Example 8 The entanglement process was carried out in the same manner as in Example 1, except that the air supply energy was changed to 0.8 kW. The results are shown in Table 2 below.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

L'invention concerne : des fibres de polyamide pour un câble pour pneu, avec lesquelles une coupe d'un câble pendant des étapes de production d'un câble pour pneu et d'un tissu câblé pour pneu est supprimée ; un procédé de production de celles-ci ; un câble à fils torsadés utilisant les fibres ; et un tissu câblé utilisant le câble. La présente invention concerne des fibres de polyamide pour un câble pour pneu et un procédé de production de celles-ci, la résistance au nœud aérien des fibres de polyamide dans un environnement à une température de 180 °C étant de 3,5 à 6,0 cN/dtex.
PCT/JP2022/027269 2021-07-16 2022-07-11 Fibres de polyamide pour câble pour pneu et procédé de production de celles-ci WO2023286738A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2023534794A JPWO2023286738A1 (fr) 2021-07-16 2022-07-11
CN202280049215.5A CN117642531A (zh) 2021-07-16 2022-07-11 轮胎帘线用聚酰胺纤维及其制法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-117985 2021-07-16
JP2021117985 2021-07-16

Publications (1)

Publication Number Publication Date
WO2023286738A1 true WO2023286738A1 (fr) 2023-01-19

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ID=84919388

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/027269 WO2023286738A1 (fr) 2021-07-16 2022-07-11 Fibres de polyamide pour câble pour pneu et procédé de production de celles-ci

Country Status (3)

Country Link
JP (1) JPWO2023286738A1 (fr)
CN (1) CN117642531A (fr)
WO (1) WO2023286738A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541330B2 (fr) * 1977-06-30 1980-10-23
JPS63165513A (ja) * 1986-12-25 1988-07-08 Toray Ind Inc ポリアミド繊維の直接紡糸延伸方法
JP2007062585A (ja) * 2005-08-31 2007-03-15 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2009068132A (ja) * 2007-09-12 2009-04-02 Toray Ind Inc 繊維、ゴム補強コード、ならびに補強ゴム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541330B2 (fr) * 1977-06-30 1980-10-23
JPS63165513A (ja) * 1986-12-25 1988-07-08 Toray Ind Inc ポリアミド繊維の直接紡糸延伸方法
JP2007062585A (ja) * 2005-08-31 2007-03-15 Yokohama Rubber Co Ltd:The 空気入りタイヤ
JP2009068132A (ja) * 2007-09-12 2009-04-02 Toray Ind Inc 繊維、ゴム補強コード、ならびに補強ゴム

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Publication number Publication date
JPWO2023286738A1 (fr) 2023-01-19
CN117642531A (zh) 2024-03-01

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