EP3720999A2 - High performance nylon tire cords - Google Patents
High performance nylon tire cordsInfo
- Publication number
- EP3720999A2 EP3720999A2 EP18915257.2A EP18915257A EP3720999A2 EP 3720999 A2 EP3720999 A2 EP 3720999A2 EP 18915257 A EP18915257 A EP 18915257A EP 3720999 A2 EP3720999 A2 EP 3720999A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cord
- ply
- twist
- high performance
- cords
- 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.)
- Withdrawn
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0042—Reinforcements made of synthetic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/005—Reinforcements made of different materials, e.g. hybrid or composite cords
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C2009/0071—Reinforcements or ply arrangement of pneumatic tyres characterised by special physical properties of the reinforcements
- B60C2009/0092—Twist structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0425—Diameters of the cords; Linear density thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0466—Twist structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/02—Tyres specially adapted for particular applications for aircrafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/14—Tyres specially adapted for particular applications for off-road use
-
- 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
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
- D02G3/28—Doubled, plied, or cabled threads
-
- 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 two or three-ply nylon textile (multifil) cords having residual twist in ply yarns in cord which are used as reinforcement in bias and radial aircraft and off the road tires.
- the conventional textile tire reinforcement cords are comprised of pre-twisted yarns(plies) in
- yarn or ply twists are equal to the cable or cord twist.
- the residual or resultant yarn twist in cords becomes zero due to untwisting during cord or cable twisting in opposite direction.
- the zero twisted or untwisted ply yarns in cord have loose parallel filament bundles which have open structure.
- the main advantage of such a cord structure is its simplicity to produce, and its high breaking strength (due to parallel filaments in cord plies.
- the breaking strength advantage is valid only for greige or undipped cords. After dipping process, such cords are subjected to a significant reduction in breaking strength due to adhesive dip penetration between the interstices(void channels ) of the filament bundles.
- two-ply nylon 6.6 cord in which the first and second plies(yarns)having different twists from each other, has been proposed as low angle overlay(cap ply), which improves uniformity due to ist high initial extensibility (low modulus).
- Such cords enable high process expansion during moulding and
- SUBSTITUTE SHEETS (RULE 26) curing without excessive tight cord formation, but their effectiveness to prevent tire growth under high speed conditions is poor because of their low modulus. Additionally, such cords have asymmetric structure causing non-uniform stress distribution (load sharing) between the cord plies and also have tendency to buckle under axial compression leading to early cord breaks.
- yarn twist is always higher than cord twist.
- the high performance (HP) textile cord structures according to invention comprise a sufficient level of residual ply yarn twist in opposite direction of cord twist.
- the ply (yarn) twist is always higher than that of cord twist but in opposite direction.
- the major carcass reinforcements in aircraft and off the road tires are nylon cords (e.g. nylon 6 and nylon 6.6 ).
- the filament bundles in such nylon cord plies are not open(zero twist), but compacted under residual twist and have closed bundle structures.
- adhesive dip solution(RFL) can not penetrate into the depth of cord plies, but be accumulated on the cord surface, which results in low bending stiffness after drying and heat-setting steps , which is important for improved fatigue resistance and breaking strength retention.
- the residual twist levels in the plies of the textile cords according to the invention are equal to each other but in opposite direction of cord twist( Figure- 1 and Figure- 2).
- the maximum residual twist difference between the cord plies is less than 15%.
- the plies of the high performance textile cords according to the invention have circular (figure-3, 9 and 10, Figure-5 19, 20 and 21) or oval (12 and 13 in figure- 4, 23, 24 and 25 in figure-6) cross-sections instead of cresent shaped (6 and 7 in figures-3 an4 ) or triangular cross-sections of 2and 3-ply conventional cords.
- the circumference of the high performance cords are much higher than that of the conventional cords.
- the high performance cords have much higher contact surface(adhesive interface) with rubber matrix in tire. Such an increase in contact surface enables
- the plies of the high performance cords with residual twist become more closed and compact during heat- setting process due to their thermal contraction in lateral direction which improves ply stability.
- cord structures and their ply-components according to the invention are illustrated.
- Figure- 1 is the comparison of prior art and according to invention S twisted cords, wherein
- Figure-2 is the comparison of prior art and according to invention Z twisted cords, wherein
- Cord ply Basic yarn components of a cord
- Dtex The gram weight of yam having 10,000 meter length.
- Linear density Weight per unit length as g/dtex or g/d(denier)
- Nylon 6.6 Polyhexamethylene adipamide
- Nylon 6 Polycaprolactam
- Nylon 4.6 polytetramethylene adipamide
- Residual twist Resultant twist of the ply yams of a cord (ply twist-cord twist)
- Total linear density The sum of the nominal linear densities of 5 the ply yarns of the cord
- Two-ply cord Cord prepared by twisting together two plied yams
- Three-ply cord Cord prepared by twisting together three plied yams
- the residual twist and twist multiplier can be calculated accoring to following formulas:
- the total linear density of the high performance cord according to the invention is greater than 2500 dtex and less than 9000 dtex in opposite direction of the cord twist direction.
- the linear densities of the cord plies according to the invention are equal.
- the maximum linear density difference between the plies of the cord according to the invention is less than 10%.
- the ply yams in high performance cord according to the invention is comprising of nylon 6.6, nylon 6, nylon 4.6 or mixtures thereof.
- the high performance cord according to the invention is used as carcass reinforcement in radial and bias aircraft and off the road tires.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Tires In General (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TR2017/19810A TR201719810A2 (en) | 2017-12-07 | 2017-12-07 | HIGH PERFORMANCE NYLON TIRE CORD |
PCT/TR2018/050740 WO2019203743A2 (en) | 2017-12-07 | 2018-11-28 | High performance nylon tire cords |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3720999A2 true EP3720999A2 (en) | 2020-10-14 |
EP3720999A4 EP3720999A4 (en) | 2021-09-01 |
Family
ID=67952701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18915257.2A Withdrawn EP3720999A4 (en) | 2017-12-07 | 2018-11-28 | High performance nylon tire cords |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3720999A4 (en) |
KR (1) | KR20200088893A (en) |
CN (1) | CN111670276A (en) |
TR (1) | TR201719810A2 (en) |
WO (1) | WO2019203743A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113550037A (en) * | 2021-06-29 | 2021-10-26 | 三角轮胎股份有限公司 | Nylon cord and tire thereof |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB526163A (en) * | 1938-10-25 | 1940-09-12 | Wingfoot Corp | Improvements in and relating to cords for reinforcing tyres, belting, hose and other articles |
US3921691A (en) * | 1968-10-11 | 1975-11-25 | Ici Ltd | Macrofilamentary yarns and rubber structures reinforced therewith |
JP3118152B2 (en) * | 1993-11-30 | 2000-12-18 | 株式会社ブリヂストン | Pneumatic tire |
EP1477333B1 (en) * | 2002-01-24 | 2018-06-20 | Bridgestone Corporation | Pneumatic radial tire |
JP2003226112A (en) * | 2002-02-06 | 2003-08-12 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire for heavy load |
JP2004210194A (en) * | 2003-01-07 | 2004-07-29 | Bridgestone Corp | Radial tire |
DE102010017786A1 (en) * | 2010-07-07 | 2012-01-12 | Continental Reifen Deutschland Gmbh | Elastomer product containing a linear textile structure for reinforcement |
US20120211139A1 (en) * | 2011-02-17 | 2012-08-23 | Shulong Li | Adhesion Composition and Textile Materials and Articles Treated Therewith |
KR101260390B1 (en) * | 2011-07-25 | 2013-05-21 | 한국타이어 주식회사 | Hybride cord comprised of Aramid cord and Nylon 66, and Pneumatic Tire Using it as a Reinforcing Cord |
FR3032150A1 (en) * | 2015-02-03 | 2016-08-05 | Michelin & Cie | RADIAL TIRE HAVING IMPROVED BELT STRUCTURE |
-
2017
- 2017-12-07 TR TR2017/19810A patent/TR201719810A2/en unknown
-
2018
- 2018-11-28 CN CN201880088931.8A patent/CN111670276A/en active Pending
- 2018-11-28 EP EP18915257.2A patent/EP3720999A4/en not_active Withdrawn
- 2018-11-28 WO PCT/TR2018/050740 patent/WO2019203743A2/en active Search and Examination
- 2018-11-28 KR KR1020207018771A patent/KR20200088893A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
TR201719810A2 (en) | 2019-06-21 |
EP3720999A4 (en) | 2021-09-01 |
KR20200088893A (en) | 2020-07-23 |
CN111670276A (en) | 2020-09-15 |
WO2019203743A3 (en) | 2020-01-16 |
WO2019203743A2 (en) | 2019-10-24 |
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Legal Events
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STAA | Information on the status of an ep patent application or granted ep patent |
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Extension state: BA ME |
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DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20210802 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: D02G 3/48 20060101AFI20210727BHEP Ipc: B60C 9/00 20060101ALI20210727BHEP |
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Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20220301 |