WO2014102719A1 - A hybrid cord structure - Google Patents

A hybrid cord structure Download PDF

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Publication number
WO2014102719A1
WO2014102719A1 PCT/IB2013/061309 IB2013061309W WO2014102719A1 WO 2014102719 A1 WO2014102719 A1 WO 2014102719A1 IB 2013061309 W IB2013061309 W IB 2013061309W WO 2014102719 A1 WO2014102719 A1 WO 2014102719A1
Authority
WO
WIPO (PCT)
Prior art keywords
hybrid cord
basalt
dtex
fiber
cord structure
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/IB2013/061309
Other languages
French (fr)
Inventor
Sevim DOGAN
Nacide Nurcin CEVAHIR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kordsa Teknik Tekstil AS
Original Assignee
Kordsa Global Endustriyel Iplik ve Kord Bezi Sanayi ve Ticaret AS
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 Kordsa Global Endustriyel Iplik ve Kord Bezi Sanayi ve Ticaret AS filed Critical Kordsa Global Endustriyel Iplik ve Kord Bezi Sanayi ve Ticaret AS
Priority to LU92527A priority Critical patent/LU92527B1/en
Publication of WO2014102719A1 publication Critical patent/WO2014102719A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/02—Inorganic fibres based on oxides or oxide ceramics, e.g. silicates
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides

Definitions

  • the present invention relates to a hybrid cord structure used in tire production which is comprised of polyamide 6.6 (NY 6.6) and basalt fiber, and environmental friendly and has high performance.
  • Cord fabric used as reinforcing material in tire is comprised by adjoining thousands of warp yarns parallel to each other and weft yarns loose woven vertical to the warp yarns.
  • the weft yarns are generally not load bearing members; they are the yarns which only hold the warp yarns together.
  • the industrial yarns such as polyethylene terephthalate (PET), polyamide 6.6 /NY66), polyamide 6 (NY6), Rayon (RY), Aramide (Ar) and polyethylene naphthalate (PEN) which have high tenacity are the most commonly used materials that are used as rubber reinforcement member.
  • PET polyethylene terephthalate
  • NY6 polyamide 6
  • RY Rayon
  • Ar Aramide
  • PEN polyethylene naphthalate
  • the use of polyethylene terephthalate (PET) as reinforcement material in tire, hose, conveyor belt and belt applications has recently increased. The reason for this is that the deformation decreases significantly by means of the composite structure rubber the PET having HMLS (high modulus low shrinkage) with high strength and low elongation forms with the rubber. Therefore materials with more performance can be produced.
  • Rayon (RY) is a fiber which has very high dimensional stability but low resistance, moisture sensitivity and low strength.
  • Polyamide has higher resistance and resistance than the rayon whereas its dimensional stability is lower.
  • PEN fiber which is another PET, has higher dimensional stability, resistance and strength than PET.
  • Relatively new fibers such as carbon fiber, PBO, polyketone amongst the fibers with high performance like PEN are used as tire reinforcement material
  • the use of the said fibers cannot be generalized in tire because of their high cost.
  • the hybrid cords formed by combining fibers with different features become more developed products than the fibers forming themselves.
  • the twists of the hybrid cords having different twisting levels are realized in ring twist machines. Each fiber is produced by being twisted separately in ring twist machines, and then hybrid cord is formed by twisting the fibers having different features produced in different twisting levels in the ring twisting machines by being twisted together.
  • Nylon and Aramide are the materials that are mainly used in cap ply strip.
  • the objective of the present invention is to provide a high performance, new generation hybrid cord structure to be used in cap ply strip in pneumatic strips tires.
  • Figure 1 is the graphic of the force-elongation curves of the aramide, nylon and basalt-nylon hybrid cords.
  • Figure 2 is the graphic showing the modulus characterizing the load- elongation curve.
  • the inventive hybrid cord structure which is used in production of cord fabric supporting the tire structure used in vehicles and enables to eliminate the negative features by using fibers produced from different material together, comprises - base fiber which has negative and positive properties together according to the different fields of use and conditions in terms of mechanical features such as thermal stability (shrinkage), and which is preferably manufactured from nylon, aramide material to be used in vehicle tire, and - enhancing basalt fiber which is used being twisted with the base fiber and improves the mechanical features of the base fiber in the areas where it corresponds in vehicle tire by being used in different densities according to the said areas.
  • thermal stability shrinkage
  • the features of the hybrid cords change according to the type, layer number, twist direction and twist level, linear density of the material (dtex).
  • the linear density range of the basalt fiber in the hybrid cord is 680-6000 dtex, and the linear density range of NY66 fiber which is the base fiber preferred in the invention is 940-2800 dtex.
  • the weight ratio of the basalt inside the hybrid cord varies between 10% and 80% for all structures. Preferably the said ratio can be between 40% and 60%.
  • the twist direction of the cord is in Z or S direction
  • the twist direction of basalt and base fibers can be Z or S.
  • the twist directions of basalt and base fibers are the same and the layered cord structure has opposite twist direction.
  • the twist level of each fiber for hybrid cord should be between 100 tpm and 800 tpm, and the twist level of the hybrid cord can be 100 tpm and 800 tpm.
  • the layered twist level and the twist level of each fiber are the same, and it is between 200 tpm and 600 tpm.
  • the most preferred twist level is between 250-350 tpm.
  • basalt and/or Nylon fibers can be used more than once.
  • Basalt-Nylon hybrid cord can be used as cap ply strip in pneumatic tires.
  • Basalt-Nylon hybrid cord can be used as reinforcement material in carcass in pneumatic tires.
  • Basalt Nylon hybrid cord can be applied as narrow strips such that it will make 0- 5 degrees with the tire circumferential axis in tire cap plies.
  • the basalt-Nylon hybrid cord number of the said strips in decimeter can vary between 50 and 150.
  • the number of cords in decimeter is between 80 and 120, the most preferred comprises 90 to 110 cords per decimeter.
  • the density structures of NY66 which is the preferred basalt fiber and base fiber in the inventive hybrid cord structure are as follows:
  • Basalt fiber is a high performance fiber which is obtained from completely natural sources.
  • the production cost of basalt which is a completely natural and environmental friendly product in terms of both the production process and the obtained product is very low. There is no waste during production, it is produced with 100% efficient process.
  • Basalt fiber is a high performance fiber which is obtained from volcanic rocks.
  • a hybrid cord product having stronger and superior features is realized by combining cords with different features.
  • the thermal stability of which is higher with the basalt fiber the mechanical features of which can be controlled and do not change.
  • the disadvantages of nylon fiber the modulus of which is not enough at high speeds in cap ply layer and the aramide fiber which makes the production difficult with its high modulus during tire vulcanization stage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Tires In General (AREA)

Abstract

The present invention relates to a hybrid cord structure used in tire production which is comprised of polyamide 6.6 (NY 6.6) and basalt fiber, and environmental friendly and has high performance. The objective of the present invention is to provide a high performance, new generation hybrid cord structure to be used as cap ply strip in pneumatic tires.

Description

A HYBRID CORD STRUCTURE
Field of the Invention
The present invention relates to a hybrid cord structure used in tire production which is comprised of polyamide 6.6 (NY 6.6) and basalt fiber, and environmental friendly and has high performance.
Background of the Invention
Cord fabric used as reinforcing material in tire is comprised by adjoining thousands of warp yarns parallel to each other and weft yarns loose woven vertical to the warp yarns. The weft yarns are generally not load bearing members; they are the yarns which only hold the warp yarns together.
The industrial yarns such as polyethylene terephthalate (PET), polyamide 6.6 /NY66), polyamide 6 (NY6), Rayon (RY), Aramide (Ar) and polyethylene naphthalate (PEN) which have high tenacity are the most commonly used materials that are used as rubber reinforcement member. The use of polyethylene terephthalate (PET) as reinforcement material in tire, hose, conveyor belt and belt applications has recently increased. The reason for this is that the deformation decreases significantly by means of the composite structure rubber the PET having HMLS (high modulus low shrinkage) with high strength and low elongation forms with the rubber. Therefore materials with more performance can be produced. Rayon (RY) is a fiber which has very high dimensional stability but low resistance, moisture sensitivity and low strength. Polyamide has higher resistance and resistance than the rayon whereas its dimensional stability is lower. PEN fiber, which is another PET, has higher dimensional stability, resistance and strength than PET. The use of PEN fiber, which has superior features than PET, cannot be generalized in tire because of its high cost. Relatively new fibers such as carbon fiber, PBO, polyketone amongst the fibers with high performance like PEN are used as tire reinforcement material However the use of the said fibers cannot be generalized in tire because of their high cost. The hybrid cords formed by combining fibers with different features become more developed products than the fibers forming themselves.
United States patent documents nos US3419059, US4155394, US5419383, US5558144, and European Patent document no EP0335588 disclose studies on hybrid cords.
While the desired features are provided to the fibers with different properties by twisting, in general the fibers with high modulus are twisted in higher twisting levels and the fibers the low modulus are twisted in lower twisting levels. The twists of the hybrid cords having different twisting levels are realized in ring twist machines. Each fiber is produced by being twisted separately in ring twist machines, and then hybrid cord is formed by twisting the fibers having different features produced in different twisting levels in the ring twisting machines by being twisted together. In the state of the art, Nylon and Aramide are the materials that are mainly used in cap ply strip. By means of the high shrinkage capability of nylon, the expanding geometry of the tire with the speed of the vehicle is kept in certain limits and thus the tire is enabled to operate with performance. However, since its modulus is far lower than the materials such as Aramide, it is less used in high performance tires. For this reason, the use of aramide is more common in these kinds of tires. Aramide distorts the tire geometry during tire production in vulcanization stage because of its very high modulus value and does not allow expansion. In addition to these, in two ply hybrid structures formed by Nylon 6.6 and aramide fibers during vulcanization, the residual tensions they have varies regionally since the expansion and stress relaxation of the tire cap zone and the cap ply zone are different. And this causes the residual tensions in the cords present in the cap ply zone to decrease and even to disappear.
Summary of the Invention
The objective of the present invention is to provide a high performance, new generation hybrid cord structure to be used in cap ply strip in pneumatic strips tires.
Detailed Description of the Invention
The inventive hybrid cord structure is illustrated in the figures, wherein
Figure 1 is the graphic of the force-elongation curves of the aramide, nylon and basalt-nylon hybrid cords.
Figure 2 is the graphic showing the modulus characterizing the load- elongation curve.
The inventive hybrid cord structure, which is used in production of cord fabric supporting the tire structure used in vehicles and enables to eliminate the negative features by using fibers produced from different material together, comprises - base fiber which has negative and positive properties together according to the different fields of use and conditions in terms of mechanical features such as thermal stability (shrinkage), and which is preferably manufactured from nylon, aramide material to be used in vehicle tire, and - enhancing basalt fiber which is used being twisted with the base fiber and improves the mechanical features of the base fiber in the areas where it corresponds in vehicle tire by being used in different densities according to the said areas.
The features of the hybrid cords change according to the type, layer number, twist direction and twist level, linear density of the material (dtex). The linear density range of the basalt fiber in the hybrid cord is 680-6000 dtex, and the linear density range of NY66 fiber which is the base fiber preferred in the invention is 940-2800 dtex. The weight ratio of the basalt inside the hybrid cord varies between 10% and 80% for all structures. Preferably the said ratio can be between 40% and 60%. Within the scope of the present invention, the twist direction of the cord is in Z or S direction, the twist direction of basalt and base fibers can be Z or S. Preferably, the twist directions of basalt and base fibers are the same and the layered cord structure has opposite twist direction. The twist level of each fiber for hybrid cord should be between 100 tpm and 800 tpm, and the twist level of the hybrid cord can be 100 tpm and 800 tpm. Preferably, the layered twist level and the twist level of each fiber are the same, and it is between 200 tpm and 600 tpm. The most preferred twist level is between 250-350 tpm.
In basalt Nylon hybrid cords, basalt and/or Nylon fibers can be used more than once.
Basalt-Nylon hybrid cord can be used as cap ply strip in pneumatic tires.
Basalt-Nylon hybrid cord can be used as reinforcement material in carcass in pneumatic tires.
Basalt Nylon hybrid cord can be applied as narrow strips such that it will make 0- 5 degrees with the tire circumferential axis in tire cap plies.
The basalt-Nylon hybrid cord number of the said strips in decimeter can vary between 50 and 150. Preferably, the number of cords in decimeter is between 80 and 120, the most preferred comprises 90 to 110 cords per decimeter. The density structures of NY66 which is the preferred basalt fiber and base fiber in the inventive hybrid cord structure are as follows:
940 dtex NY66-680 dtex Basalt
940 dtex NY66-900 dtex Basalt
940 dtex NY66-1100 dtex Basalt
940 dtex NY66-2200 dtex Basalt
940 dtex NY66-3300 dtex Basalt
1400 dtex NY66 680 dtex Basalt
1400 dtex NY66 900 dtex Basalt
1400 dtex NY66 1100 dtex Basalt
1400 dtex NY66 2200 dtex Basalt
1400 dtex NY66 3300 dtex Basalt
2100 dtex NY66- ■680 dtex Basalt
2100 dtex NY66- ■900 dtex Basalt
2100 dtex NY66- ■1100 dtex Basalt
2100 dtex NY66- ■2200 dtex Basalt
2100 dtex NY66- ■3300 dtex Basalt
2800 dtex NY66- ■680 dtex Basalt
2800 dtex NY66- -900 dtex Basalt
2800 dtex NY66- -1100 dtex Basalt
2800 dtex NY66- -2200 dtex Basalt
2800 dtex NY66-3300 dtex Basalt
Depending on the areas to which the cord fabric to be woven on tire, hybrid structures having the density levels preferred above or the different linear density levels can be used. Basalt fiber is a high performance fiber which is obtained from completely natural sources. The production cost of basalt which is a completely natural and environmental friendly product in terms of both the production process and the obtained product is very low. There is no waste during production, it is produced with 100% efficient process. Basalt fiber is a high performance fiber which is obtained from volcanic rocks.
In present invention, a hybrid cord product having stronger and superior features is realized by combining cords with different features. By this means it is possible to produce double hybrid cord structures the thermal stability of which is higher with the basalt fiber the mechanical features of which can be controlled and do not change. By this means, the disadvantages of nylon fiber the modulus of which is not enough at high speeds in cap ply layer and the aramide fiber which makes the production difficult with its high modulus during tire vulcanization stage.
Within the scope of these basic concepts, it is possible to develop various embodiments of the inventive hybrid cord structure. The invention cannot be limited to the examples described herein and it is essentially as defined in the claims.

Claims

A hybrid cord structure, which is used in production of cord fabric supporting the tire structure used in vehicles and enables to eliminate the negative features by using fibers produced from different material together, comprising
- base fiber which has negative and positive properties together according to the different fields of use and conditions in terms of mechanical features such as thermal stability (shrinkage), and which is preferably manufactured from nylon, aramide material to be used in vehicle tire, and characterized by
- enhancing basalt fiber which is used being twisted with the base fiber and improves the mechanical features of the base fiber in the areas where it corresponds in vehicle tire by being used in different densities according to the said areas.
2. A hybrid cord structure according to claim 1, characterized by a basalt fiber the linear density range of which is between 680-6000 dtex and base fiber the linear density range of which is between 940 and 2800 dtex.
3. A hybrid cord structure according to any one of the preceding claims, characterized by basalt fiber the weight ratio of which is between 10%- and 80% relative to the whole structure.
4. A hybrid cord structure according to any one of the preceding claims, characterized by basalt fibers and base fibers the twisting directions of which are in the same direction and the twisting directions formed together are in opposite direction of the said direction in order to keep the strength value as high as possible. A hybrid cord structure according to any one of the preceding claims, characterized by basalt fiber and base fibers the twist level of which is between 100 tpm and 800 tpm.
A hybrid cord structure according to any one of the preceding claims, characterized in that the number of woven cord fabric in decimeter is between 50-150.
A hybrid cord structure according to any one of the preceding claims, characterized in that it is used as cap ply strip in pneumatic tires.
A hybrid cord structure according to any one of the preceding claims, characterized in that it is used as reinforcement material in carcass of pneumatic tires.
PCT/IB2013/061309 2012-12-25 2013-12-24 A hybrid cord structure Ceased WO2014102719A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
LU92527A LU92527B1 (en) 2012-12-25 2013-12-24 Hybrid cable structure

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201215232 2012-12-25
TR2012/15232 2012-12-25

Publications (1)

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WO2014102719A1 true WO2014102719A1 (en) 2014-07-03

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016023656A1 (en) * 2014-08-15 2016-02-18 Continental Reifen Deutschland Gmbh Hybrid cord for use as reinforcement in a belt bandage of a pneumatic vehicle tire
EP3441237A1 (en) * 2017-08-11 2019-02-13 Continental Reifen Deutschland GmbH Hybrid cord for use as a support in a belt of a pneumatic vehicle tyre
WO2022074046A1 (en) 2020-10-07 2022-04-14 Bridgestone Europe Nv/Sa Sustainable hybrid cord for tyres
WO2022090382A1 (en) 2020-10-28 2022-05-05 Bridgestone Europe Nv/Sa Hybrid cord for tires using basalt and cellulose fibers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161949A (en) * 1920-04-17 1921-10-06 Le Basalte Soc Method for the use of basalt
US3419059A (en) 1965-05-04 1968-12-31 Goodyear Tire & Rubber Reinforcement element
US4155394A (en) 1977-08-29 1979-05-22 The Goodyear Tire & Rubber Company Tire cord composite and pneumatic tire
EP0335588A2 (en) 1988-03-28 1989-10-04 Sumitomo Rubber Industries Limited Radial tyre
US5419383A (en) 1991-11-15 1995-05-30 Sumitomo Rubber Industries, Ltd. Pneumatic tire including hybrid belt cord
US5558144A (en) 1993-12-28 1996-09-24 Sumitomo Rubber Industries, Ltd. Pneumatic radial tire with hybrid band cord
EP1997649A1 (en) * 2007-05-31 2008-12-03 Continental Aktiengesellschaft Hybrid cord reinforcing layer for elastomeric products, in particular for the belt of vehicle pneumatic tyres
WO2013076617A1 (en) * 2011-11-22 2013-05-30 Kordsa Global Endustriyel Iplik Ve Kord Bezi̇ Sanayi̇ Ve Ticaret Anonim Sirketi A tire cord fabric with tabby
WO2013098738A1 (en) * 2011-12-27 2013-07-04 Pirelli Tyre S.P.A. Tyre for motorcycles

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB161949A (en) * 1920-04-17 1921-10-06 Le Basalte Soc Method for the use of basalt
US3419059A (en) 1965-05-04 1968-12-31 Goodyear Tire & Rubber Reinforcement element
US4155394A (en) 1977-08-29 1979-05-22 The Goodyear Tire & Rubber Company Tire cord composite and pneumatic tire
EP0335588A2 (en) 1988-03-28 1989-10-04 Sumitomo Rubber Industries Limited Radial tyre
US5419383A (en) 1991-11-15 1995-05-30 Sumitomo Rubber Industries, Ltd. Pneumatic tire including hybrid belt cord
US5558144A (en) 1993-12-28 1996-09-24 Sumitomo Rubber Industries, Ltd. Pneumatic radial tire with hybrid band cord
EP1997649A1 (en) * 2007-05-31 2008-12-03 Continental Aktiengesellschaft Hybrid cord reinforcing layer for elastomeric products, in particular for the belt of vehicle pneumatic tyres
WO2013076617A1 (en) * 2011-11-22 2013-05-30 Kordsa Global Endustriyel Iplik Ve Kord Bezi̇ Sanayi̇ Ve Ticaret Anonim Sirketi A tire cord fabric with tabby
WO2013098738A1 (en) * 2011-12-27 2013-07-04 Pirelli Tyre S.P.A. Tyre for motorcycles

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PICO D ET AL: "Natural volcanic rock fibers", CHEMICAL FIBERS INTERNATIONAL, IBP PRESS, FRANKFURT AM MAIN, DE, vol. 61, no. 2, 1 June 2011 (2011-06-01), pages 90 - 91, XP001562998, ISSN: 0340-3343 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016023656A1 (en) * 2014-08-15 2016-02-18 Continental Reifen Deutschland Gmbh Hybrid cord for use as reinforcement in a belt bandage of a pneumatic vehicle tire
CN106574409A (en) * 2014-08-15 2017-04-19 大陆轮胎德国有限公司 Hybrid cord for use as reinforcement in a belt bandage of a pneumatic vehicle tire
CN106574409B (en) * 2014-08-15 2020-11-03 大陆轮胎德国有限公司 Hybrid cord used as reinforcement carrier in belt cuffs for vehicle pneumatic tires
US11148469B2 (en) 2014-08-15 2021-10-19 Continental Reifen Deutschland Gmbh Hybrid cord for use as reinforcement in a belt bandage of a pneumatic vehicle tire
EP3441237A1 (en) * 2017-08-11 2019-02-13 Continental Reifen Deutschland GmbH Hybrid cord for use as a support in a belt of a pneumatic vehicle tyre
WO2022074046A1 (en) 2020-10-07 2022-04-14 Bridgestone Europe Nv/Sa Sustainable hybrid cord for tyres
WO2022090382A1 (en) 2020-10-28 2022-05-05 Bridgestone Europe Nv/Sa Hybrid cord for tires using basalt and cellulose fibers

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