US2004028902A1PendingUtilityA1
Dipped cord made of melt spun filament yarns of an alternating copolymer and a process for manufacturing said cord
Est. expiryDec 20, 2019(expired)· nominal 20-yr term from priority
D02G 3/48Y10T428/2967D01F 6/30Y10T428/2933Y10T428/2931
43
PatentIndex Score
0
Cited by
0
References
0
Claims
Abstract
Dipped cords made from melt-spun filament yarns of an alternating copolymer of alkenes and carbon monoxide have a cord twist factor in the range of 120 to 250 and a breaking tenacity BT≧750 mN/tex, a TASE-2>70 mN/tex, and a HAS-2′-180° C. (5 mN/tex)<3.6%. These dipped cords are made by subjecting drawn filament yarns to a dipping treatment. Preference is given to dipped cords having a breaking tenacity BT≧850 mN/tex and a TASE-2>75 mN/tex, which are obtainable from yarns wherein after dipsimulation, the aspect ratio of the crystals 2Λ 002 /(Λ 210 +Λ 310 ) varies between 2.3 and 2.7. The cords are preeminently suitable to reinforce rubber articles such as car tires.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . Dipped cord made of melt spun filament yarns of a copolymer of alkenes and carbon monoxide having a cord twist factor in the range of 120 to 250 and a
breaking tenacity BT≧750 mN/tex, TASE-2>70 mN/tex, and HAS-2′-180° C. (5 mN/tex)<3.6%.
2 . Dipped cord according to claim 1 , wherein the dipped cord has a
breaking tenacity BT≧800 mN/tex, TASE-2>75 mN/tex, and HAS-2°-180° C. (5 mN/tex)<3%.
3 . Dipped cord according to claim 2 , wherein the melt spun filament yarn after dipsimulation has the following structural properties:
crystal density D c >1,285 kg/m 3 , birefringence Δn>0.0570, crystallinity V c >40%, with an aspect ratio of crystals 2Λ 002 /(Λ 210 +Λ 310 ) between 2 and 3.
4 . Dipped cord according to claim 2 , wherein the dipped cord has a
breaking tenacity BT≧850 mN/tex, and TASE-2>75 mN/tex.
5 . Dipped cord according to claim 4 , wherein the melt spun filament yarn after dipsimulation has an aspect ratio of the crystals 2Λ 002 /(Λ 210 +Λ 310 ) varying between 2.3 and 2.7.
6 . Dipped cord according to claim 1 , wherein the copolymer is made up of ethylene/propylene and carbon monoxide, with an amount of propylene of from 0.5 to 4 mole percent of an amount of ethylene.
7 . A process for manufacturing the dipped cord according to claim 1 , comprising
forming a cord from melt spun filament yarns comprised of a thermoplastic copolymer of alkenes and carbon monoxide having a breaking tenacity BT≧900 mN/tex, a melting point T m >220° C., a crystallinity V c >33%, and a birefringence Δn>0.0550, dipping the cord in an aqueous solution of resorcinol-formaldehyde-latex (RFL), drying the dipped cord, and subsequently subjecting the dried cord to a thermal treatment at a temperature in the range of from 210 to 250° C. under a tension of from 20 to 120 mN/tex.
8 . A process for manufacturing the dipped cord according to claim 2 , comprising
forming a cord from melt spun filament yarns comprised of a thermoplastic copolymer of alkenes and carbon monoxide having a breaking tenacity BT≧950 mN/tex, a crystal density D c >1,285 kg/m 3 , a crystallinity V c >40%, and a birefringence Δn>0.0570, dipping the cord in an aqueous solution of resorcinol-formaldehyde-latex (RFL), drying the dipped cord, and subsequently subjecting the dried cord to a thermal treatment at a temperature in the range of from 210 to 250° C. under a tension of from 20 to 120 mN/tex.
9 . A rubber article containing the dipped cord according to claim 1 .
10 . A rubber article containing a dipped cord made by the process of claim 7 .
11 . A tire containing the dipped cord according to claim 1 .
12 . A tire containing a dipped cord made by the process of claim 7 .
13 . The process for manufacturing the dipped cord according to claim 7 , wherein the filaments yarns are spun from a polymer melt free of crystallization nuclei at a temperature of at most 40 K above the melting temperature of the polymer (in K) and the yarn is drawn at a temperature in the range of T mc −15K to T mc −90K, with T mc representing the “constrained” melting temperature, at a draw ratio of from 5 to 12 and a drawing tension corrected for temperature DT d,corr. in the range of 105 to 300 mN/tex, with
DT
d
,
corr
=
F
DR
·
DR
tex
[
(
1000
/
T
d
)
-
(
1000
/
T
m
c
)
]
0.8
,
wherein
F DR represents the force measured at a draw ratio DR (in mN) and T d represents drawing temperature (in K).Join the waitlist — get patent alerts
Track US2004028902A1 — get alerts on status changes and closely related new filings.
We store only your email — no account needed. See our privacy policy.