JPS6348726B2 - - Google Patents
Info
- Publication number
- JPS6348726B2 JPS6348726B2 JP57154230A JP15423082A JPS6348726B2 JP S6348726 B2 JPS6348726 B2 JP S6348726B2 JP 57154230 A JP57154230 A JP 57154230A JP 15423082 A JP15423082 A JP 15423082A JP S6348726 B2 JPS6348726 B2 JP S6348726B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- cord
- yarn
- twist
- coefficient
- 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.)
- Expired
Links
- 229920000728 polyester Polymers 0.000 claims description 13
- 238000009987 spinning Methods 0.000 claims description 9
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- LZFNKJKBRGFWDU-UHFFFAOYSA-N 3,6-dioxabicyclo[6.3.1]dodeca-1(12),8,10-triene-2,7-dione Chemical compound O=C1OCCOC(=O)C2=CC=CC1=C2 LZFNKJKBRGFWDU-UHFFFAOYSA-N 0.000 description 1
- FXXJMLQTXSVBIR-UHFFFAOYSA-N benzoic acid;ethene Chemical compound C=C.OC(=O)C1=CC=CC=C1 FXXJMLQTXSVBIR-UHFFFAOYSA-N 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Description
この発明は中間伸度と乾燥収縮度の小さいポリ
エステルコードをカーカスプライとした均一性の
優れた空気入りタイヤに関する。
一般にタイヤの製造工程においては、コードを
多数本配列したすだれ織にゴム引を施した後、コ
ードに対して所定の角度で裁断し、この裁断片の
端部コードを１〜10本重ね合わせて接合してスト
リツプとし、このストリツプをコードに沿つて所
定の長さに切断し、この両切断端部のコードを成
形機上で１〜５本重ね合わせて接合して円筒状の
カーカスプライを形成し、カーカスプライの両開
口部に環状ビード組立体を当接する。次いでビー
ド間隔を狭めながら膨径してトロイダル状とす
る、トロイダル状にする前または後でトレツドゴ
ム、サイドゴムを重合してグリーンタイヤを形成
し、このグリーンタイヤをモールド中で加硫成型
し、加硫成型したタイヤは、タイヤ内腔に圧縮空
気を封入して収縮を防止しながら冷却する、いわ
ゆるポストインフレーシヨンをする、上記のタイ
ヤ製造工程において、カーカスプライの重ね合わ
せ接合部は他の部分に比べて剛性が大きい。
円筒状のカーカスプライをトロイダル状に形成
する時に剛性の大きい部分は拡張される割合が小
さくなつて、剛性の差が大きくなる。上記のよう
にしてカーカスプライに局部的に剛性の異なる所
が生ずれば、その部分の加硫内圧またはポストイ
ンフレーシヨン空気圧によりコードに作用する張
力は、他の部分とは異なり、コードの加熱収縮の
不同が生じ、タイヤ不均一の原因となる。
一方、タイヤに内圧を充填して使用するとき、
内圧によりタイヤは膨張するが、上記のようなカ
ーカスプライの剛性の不均一があると膨張は極部
的に不同となり、サイド凹凸の原因となる。
上記したタイヤ製造工程におけるタイヤ不均一
性はコードの乾燥収縮率が大きいことにより、一
方タイヤ使用におけるサイド凹凸はコードの中間
伸度が大きいことによるものであるから、コード
の乾熱収縮と中間伸度の小さいことが要望され
る。
コードの寸法安定性を示すものとして、2.3
ｇ／ｄの荷重時の中間伸度（％）と150℃で30分
間加熱時の乾熱収縮率（％）との和である寸法不
安定係数が表わされ、この値が小さい程望まし
い。ところが上記中間伸度と乾熱収縮率とは自律
背反関係にあつて中間伸度を大きくすれば、乾熱
収縮率は小さくなる。
そこで、乗心地、耐摩耗性、操縦性の調和がと
れ、均一性の優れたタイヤを得るためには寸法不
安定係数の小さいポリエステルコードが要望され
るのであるが、従来の寸法不安定係数の大きいポ
リエステルヤーンを少ない撚数で加撚したコー
ド、または極限粘度が0.8以下の比較的重合度の
低いポリエステルを原料としたコードは、寸法不
安定係数は小さくなるが、耐疲労性が低下して実
用的なコードは得られない。
溶融ポリエステルを紡糸ノズルより紡出して、
殆んど張力を作用させないで冷却固化していた従
来の方法とは異なる紡糸法、すなわち溶融ポリマ
ーを紡糸ノズルより紡出して、0.01〜0.2ｇ／ｄ
の張力を作用させてクリスタツトを配向させなが
ら、紡出体断面方向の温度分布が均一になるよう
に冷却固化して得た紡出糸を1.2〜４倍に延伸し
たフイラメントは、フイラメントの中央部および
表面部ともにクリスタツトが高度に配向してお
り、このフイラメントで形成したコードの不安定
係数は、小さくなるとの知見を得てこの発明をな
したのである。
すなわちこの発明は、エチレンテレフタレート
成分を85モル％以上含有した溶融高重合度ポリエ
ステルを紡糸ノズルより紡出し、張力を作用させ
ながら冷却固化した紡出糸を延伸して得た極限粘
度〔η〕が0.8以上、複屈折Δnが190×10-3〜250
×10-3のフイラメントを多数束ねたヤーンの荷重
2.3ｇ／ｄ時の中間伸度（％）と150℃で30分間加
熱時の乾熱収縮率（％）の和で表わされる寸法不
安定係数が8.5〜18.0であつて、このヤーンを加
撚してなるストランドを複数本束ねて上撚りし、
寸法不安定係数が8.5以下になるように熱処理さ
れたポリエステルコードをタイヤのカーカスプラ
イとしたことを特徴とする均一性の優れた空気入
りタイヤである。
この発明におけるコードを形成するフイラメン
トは、エチレンテレフタレート成分を85モル％以
上含有するポリエステルからなり、ポリエチレン
テレフタレートが好ましく、またエチレンイソフ
タレート、エチレンベンゾエートなどの他の成分
を15モル％以下含む共重合ポリエステルでもよ
い。上記ポリエステルは、オルソクロールフエノ
ールを溶媒として25℃で測定した極限粘度〔η〕
が0.8以上の高重合度ポリエステルであり、極限
粘度〔η〕が0.8未満では寸法安定係数の小さい
コードが得られるが、耐疲労性および強度が低
く、これを使用したタイヤの耐久性は劣る。
上記フイラメントの断面中央部と表面部の複屈
折Δnはほぼ等しく、両者の比は1.1以下である。
通常の方法、例えば干渉顕微鏡を用いて測定し
たとき、上記フイラメントの複屈折Δnは190×
10-3〜205×10-3の範囲が好ましく、複屈折が190
×10-3未満のフイラメントは、クリスタツトの配
向が低く、従つてコードの強度が低くなる205×
10-3より大きくするには、紡糸延伸工程での生産
性が低下するので経済的に好ましくない。
上記フイラメントを多数束ねヤーンにして測定
したとき、寸法不安定係数が8.5〜18.0になるフ
イラメントが選択され、不安定係数が8.5未満の
場合には、ヤーンを加撚して熱処理する工程での
作業性が悪く経済的に好ましくなく、18.0を超え
る場合には、コードの寸法不安定係数が大きくな
つてタイヤの均一性が低下する。
上記ヤーンを加撚してストランドを形成し、こ
のストランドの複数本を束ねて上撚してコードを
形成するとき、コードの長さ10cm当りのヤーンを
ストランドにする下撚り数とストランドをコード
にする上撚り数との平均をＴ、ヤーンの合計デニ
ール数をＤとして、Ｋ＝Ｔ×√で示される撚係
数Ｋを1500〜2500の範囲に選択するのが好まし
く、撚係数が1500未満の場合には耐疲労性が小さ
く、2500を超える場合は、中間伸度が大きくな
り、内圧充填によるタイヤの膨張が大きくなつ
て、タイヤの均一性が低下する。
この発明においてコードの寸法不安定係数が
8.5以下、好ましくは8.5〜４の範囲になるように
熱処理条件が選択される。コードの寸法不安定係
数が8.5を超えればタイヤの均一性が低下する。
上記のようにして得られたコードは、前述した
通常のタイヤ製造においてカーカスプライとして
使用される。
以下にこの発明を具体的に実施例にもとづいて
説明する。
実施例
極限粘度〔η〕0.9の溶融ポリエチレンテレフ
タレートを紡糸ノズルより紡出し、張力を作用さ
せながら冷却固化して延伸したフイラメントで形
成したコードをカーカスプライにして、サイズ
165SR13のラジアルタイヤを製造した。このコー
ド製造条件及びタイヤ性能を第１表に示した。
なお、コード製造の条件の異なる実施例と同様
のタイヤを製造し、比較例として第１表に併記し
た。
This invention relates to a pneumatic tire with excellent uniformity in which a carcass ply is made of a polyester cord with low intermediate elongation and low drying shrinkage. Generally, in the tire manufacturing process, a blind weave with a large number of cords arranged is rubberized, then cut at a predetermined angle to the cords, and the end cords of the cut pieces are overlapped with 1 to 10 cords. The strips are joined to form a strip, this strip is cut to a predetermined length along the cord, and 1 to 5 cords at both cut ends are overlapped and joined on a molding machine to form a cylindrical carcass ply. Then, abut the annular bead assembly against both openings of the carcass ply. Next, the diameter is expanded while narrowing the bead spacing to form a toroidal shape. Before or after forming the toroidal shape, tread rubber and side rubber are polymerized to form a green tire. This green tire is vulcanized in a mold and vulcanized. The molded tire undergoes so-called post-inflation, a process in which compressed air is sealed in the inner cavity of the tire to cool it while preventing contraction. It has greater rigidity. When forming a cylindrical carcass ply into a toroidal shape, the portions with high rigidity are expanded at a small rate, resulting in a large difference in rigidity. If the carcass plies have locally different stiffness areas as described above, the tension acting on the cord due to the vulcanization internal pressure or post-inflation air pressure in those areas will be different from that in other areas, and the cord will heat up. Uneven contraction occurs, causing tire unevenness. On the other hand, when the tire is filled with internal pressure and used,
The tire inflates due to internal pressure, but if the stiffness of the carcass plies is uneven as described above, the inflation will be uneven in some areas, causing side unevenness. The tire non-uniformity in the tire manufacturing process described above is due to the high drying shrinkage rate of the cord, while the side unevenness during tire use is due to the high intermediate elongation of the cord. It is desired that the degree is small. 2.3 as an indication of the dimensional stability of the code.
The dimensional instability coefficient is expressed as the sum of the intermediate elongation (%) under a load of g/d and the dry heat shrinkage rate (%) when heated at 150° C. for 30 minutes, and the smaller this value is, the more desirable it is. However, the above-mentioned intermediate elongation and dry heat shrinkage rate are in an autonomously contradictory relationship, and if the intermediate elongation is increased, the dry heat shrinkage rate becomes smaller. Therefore, in order to obtain a tire with excellent uniformity and a good balance between ride comfort, wear resistance, and maneuverability, a polyester cord with a small dimensional instability coefficient is required. Cords made of large polyester yarns twisted with a small number of twists, or cords made from polyester with a relatively low degree of polymerization with an intrinsic viscosity of 0.8 or less, have a smaller dimensional instability coefficient, but have lower fatigue resistance. No working code is available. Spinning molten polyester from a spinning nozzle,
The spinning method is different from the conventional method of cooling and solidifying with almost no tension applied, in other words, the molten polymer is spun out from a spinning nozzle to produce 0.01 to 0.2 g/d.
The filament is made by drawing the spun yarn by 1.2 to 4 times by cooling and solidifying it so that the temperature distribution in the cross-sectional direction of the spun body is uniform while applying tension to orient the crystals. This invention was made based on the knowledge that crystals are highly oriented on both the filament and the surface portion, and that the instability coefficient of a cord formed with this filament is small. That is, in this invention, a molten highly polymerized polyester containing 85 mol% or more of an ethylene terephthalate component is spun from a spinning nozzle, and the spun yarn is cooled and solidified while applying tension, and then the spun yarn is drawn. 0.8 or more, birefringence Δn is 190×10 -3 ~ 250
Load of yarn made by bundling many ×10 -3 filaments
The dimensional instability coefficient expressed as the sum of the intermediate elongation (%) at 2.3 g/d and the dry heat shrinkage rate (%) when heated at 150°C for 30 minutes is 8.5 to 18.0, and this yarn is twisted. Bundle multiple strands together and twist them together.
This is a pneumatic tire with excellent uniformity, characterized in that the carcass ply of the tire is made of polyester cord that has been heat-treated to have a dimensional instability coefficient of 8.5 or less. The filament forming the cord in this invention is made of a polyester containing 85 mol% or more of an ethylene terephthalate component, preferably polyethylene terephthalate, and a copolymerized polyester containing 15 mol% or less of other components such as ethylene isophthalate and ethylene benzoate. But that's fine. The above polyester has an intrinsic viscosity [η] measured at 25°C using orthochlorophenol as a solvent.
If the intrinsic viscosity [η] is less than 0.8, a cord with a small dimensional stability coefficient can be obtained, but the fatigue resistance and strength are low, and the durability of tires using it is poor. The birefringence Δn of the central portion of the cross-section of the filament and the surface portion of the filament are approximately equal, and the ratio thereof is 1.1 or less. The birefringence Δn of the above filament is 190× when measured using a conventional method, e.g. using an interference microscope.
The range of 10 -3 to 205×10 -3 is preferable, and the birefringence is 190
Filaments less than ×10 -3 have lower crystal orientation and therefore lower cord strength.
If it is larger than 10 -3 , it is economically unfavorable because the productivity in the spinning and drawing step decreases. When a large number of the above filaments are bundled into a yarn and measured, a filament with a dimensional instability coefficient of 8.5 to 18.0 is selected. If the instability coefficient is less than 8.5, work in the process of twisting and heat treating the yarn is selected. If it exceeds 18.0, the dimensional instability coefficient of the cord increases and the uniformity of the tire decreases. When the above yarns are twisted to form a strand, and a plurality of these strands are bundled and twisted to form a cord, the number of first twists to turn the yarn into a strand per 10 cm of cord length and the number of strands to turn into a cord. It is preferable to select the twist coefficient K in the range of 1500 to 2500, where T is the average of the number of ply twists and D is the total denier of the yarn, and K = T × √. If the twist coefficient is less than 1500 has low fatigue resistance, and if it exceeds 2500, the intermediate elongation increases, the tire expands due to internal pressure filling, and the uniformity of the tire decreases. In this invention, the dimensional instability coefficient of the cord is
The heat treatment conditions are selected so that it is 8.5 or less, preferably in the range of 8.5 to 4. If the dimensional instability coefficient of the cord exceeds 8.5, the uniformity of the tire decreases. The cord obtained as described above is used as a carcass ply in the above-mentioned normal tire manufacturing. The present invention will be specifically described below based on examples. Example: Molten polyethylene terephthalate with an intrinsic viscosity [η] of 0.9 is spun from a spinning nozzle, cooled and solidified while applying tension, and a cord formed from the drawn filament is made into a carcass ply and sized.
Manufactured 165SR13 radial tires. The cord manufacturing conditions and tire performance are shown in Table 1. Incidentally, tires similar to those of the examples were manufactured with different cord manufacturing conditions, and are also listed in Table 1 as comparative examples.
【表】
上記第１表のサイド凹凸は、タイヤに2.2Kg／
cm2の内圧空気を充填したときに形成されるサドウ
オール上のラジアル方向の溝状凹部の深さを５本
のタイヤについてノギスで測定し、凹部の生じな
いものを３点、凹部の平均深さ0.3mm未満のもの
を２点、平均深さが0.3以上のものを１点として
示した。タイヤ不均一性（R.F.V）は、自動車技
術会制定の自動車規格JASO−C607に準拠して、
内圧２Kg／cm2のタイヤを荷重387Kgでドラムに押
圧して60rpmで回転させ、タイヤ半径方向の力の
変動の大きさを測定した。タイヤ耐久性は、米国
自動車安定基準FMVSS109に準拠し、内圧107
Kg／cm2、速度80Km／ｈで、所定時間毎に、所定の
荷重を加算しつつドラム走行させタイヤの故障に
至るまでの時間を測定し、従来の溶融ポリエステ
ルをノズルから紡出して張力を作用させないで紡
糸延伸したフイラメントのコードを使用した比較
例１の測定値を100として指数で示した。
上記第１表でみられるように、実施例のタイヤ
は比較例よりもサイド凹凸、タイヤ不均一性が小
さく、タイヤの均一性に優れている。実施例のタ
イヤの中でも、コードの寸法不安定係数が小さい
実施例中の１のタイヤが最も均一性が大きくなる
につれタイヤ不均一性が大きくなつている。比較
例中の２は極限粘度の小さいポリエステルコード
の例であつて、寸法不安定係数は小さいが、タイ
ヤ均一性、耐久性が実施例に比べて劣つている。
上述したように、この発明によつて得られる空
気入りタイヤはタイヤの均一性が良好であり、耐
久性にも優れている。[Table] The side unevenness in Table 1 above is 2.2Kg/
The depth of the groove-like recess in the radial direction on the saddle wall that is formed when filled with internal pressure air of cm 2 was measured with a caliper for five tires, and the average depth of the recess was measured for three tires with no recess. Two points were given for those with an average depth of less than 0.3 mm, and one point was given for those with an average depth of 0.3 or more. Tire non-uniformity (RFV) is determined based on the JASO-C607 automotive standard established by the Society of Automotive Engineers of Japan.
A tire with an internal pressure of 2 kg/cm 2 was pressed against a drum with a load of 387 kg, rotated at 60 rpm, and the magnitude of the variation in force in the tire radial direction was measured. Tire durability complies with the U.S. automobile stability standard FMVSS109, with an internal pressure of 107
kg/cm 2 at a speed of 80 km/h, the drum was run while adding a predetermined load at predetermined intervals, and the time until tire failure was measured. The measured value of Comparative Example 1 using a filament cord that was spun and drawn without any action was taken as 100 and expressed as an index. As seen in Table 1 above, the tires of the Examples have smaller side irregularities and tire non-uniformity than the Comparative Examples, and are superior in tire uniformity. Among the tires of the examples, tire non-uniformity increases as the uniformity of tire No. 1 in the example, which has a small cord dimensional instability coefficient, becomes the highest. Comparative Example 2 is an example of a polyester cord with a low intrinsic viscosity, and has a small dimensional instability coefficient, but is inferior in tire uniformity and durability compared to the Examples. As described above, the pneumatic tire obtained by the present invention has good tire uniformity and excellent durability.
Claims (1)
含有した溶融高重合度ポリエステルを紡糸ノズル
より紡出し、張力を作用させながら冷却固化した
紡出糸を延伸して得た極限粘土〔η〕が0.8以上、
複屈折Δnが190×10-3〜205×10-3のフイラメン
トを多数束ねたヤーンの荷重2.3ｇ／ｄ時の中間
伸度（％）と150℃で30分間加熱時の乾熱収縮率
（％）の和で表される寸法不安定係数が8.5〜18.0
であつて、このヤーンを下撚してなるストランド
を複数本束ねて次式 Ｋ＝Ｔ×√ （式中Ｋは撚係数、Ｔは下撚りの撚数と上撚りの
撚り数の平均値、Ｄはヤーンの合計デニール数）
で示される撚係数が1500〜2500になるように上撚
りし更に寸法不安定係数が8.5以下になるように
熱処理されたポリエステルコードをタイヤのカー
カスプライとしたことを特徴とする均一性の優れ
た空気入りタイヤ。[Scope of Claims] 1. Extreme clay [η] obtained by spinning a molten highly polymerized polyester containing 85 mol% or more of ethylene terephthalate component from a spinning nozzle, and drawing the spun yarn that was cooled and solidified while applying tension. ] is 0.8 or more,
Intermediate elongation (%) at a load of 2.3 g /d and dry heat shrinkage when heated at 150 ° C for 30 minutes ( Dimensional instability coefficient expressed as the sum of %) is 8.5 to 18.0
A plurality of strands made by pre-twisting this yarn are bundled to form the following formula: K=T×√ (where K is the twist coefficient, T is the average value of the number of twists in the first twist and the number of twists in the first twist, D is the total denier of the yarn)
The carcass ply of the tire is made of polyester cord that has been twisted so that the twist coefficient shown by pneumatic tires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154230A JPS5945202A (en) | 1982-09-03 | 1982-09-03 | Aired tire having excellent uniformity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57154230A JPS5945202A (en) | 1982-09-03 | 1982-09-03 | Aired tire having excellent uniformity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5945202A JPS5945202A (en) | 1984-03-14 |
| JPS6348726B2 true JPS6348726B2 (en) | 1988-09-30 |
Family
ID=15579689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57154230A Granted JPS5945202A (en) | 1982-09-03 | 1982-09-03 | Aired tire having excellent uniformity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5945202A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522418U (en) * | 1991-09-04 | 1993-03-23 | 日本電気株式会社 | Multiple type IC clamp hand |
| WO2020184225A1 (en) * | 2019-03-08 | 2020-09-17 | 株式会社Ｃｙｇａｍｅｓ | Information processing program, information processing method, game device, and information processing system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3686560D1 (en) * | 1985-06-21 | 1992-10-01 | Schweizerische Viscose | POLYESTER THREAD AND METHOD FOR THE PRODUCTION THEREOF. |
| US5322921A (en) * | 1985-06-21 | 1994-06-21 | Rhone-Poulenc Viscosuisse Sa | Polyester yarn |
| DE3751722T2 (en) * | 1986-11-12 | 1996-07-11 | Diafoil Hoechst Co Ltd | Polyester shrink wrap |
| US4983653A (en) * | 1986-11-12 | 1991-01-08 | Diafoil Company, Ltd. | Polyester shrinkable film containing benzotriazole |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5224066A (en) * | 1975-08-19 | 1977-02-23 | Fujitsu Ltd | And-gate element |
| JPS5358031A (en) * | 1976-10-26 | 1978-05-25 | Celanese Corp | High strength polyester yarn having highly stable internal structure |
| JPS567882A (en) * | 1979-06-27 | 1981-01-27 | Mitsubishi Electric Corp | Terminal floor stop device for elevator |
-
1982
- 1982-09-03 JP JP57154230A patent/JPS5945202A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5224066A (en) * | 1975-08-19 | 1977-02-23 | Fujitsu Ltd | And-gate element |
| JPS5358031A (en) * | 1976-10-26 | 1978-05-25 | Celanese Corp | High strength polyester yarn having highly stable internal structure |
| JPS567882A (en) * | 1979-06-27 | 1981-01-27 | Mitsubishi Electric Corp | Terminal floor stop device for elevator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0522418U (en) * | 1991-09-04 | 1993-03-23 | 日本電気株式会社 | Multiple type IC clamp hand |
| WO2020184225A1 (en) * | 2019-03-08 | 2020-09-17 | 株式会社Ｃｙｇａｍｅｓ | Information processing program, information processing method, game device, and information processing system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5945202A (en) | 1984-03-14 |
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