JP2648332B2 - Method for manufacturing pneumatic tire having sound absorbing layer - Google Patents
Method for manufacturing pneumatic tire having sound absorbing layerInfo
- Publication number
- JP2648332B2 JP2648332B2 JP63078258A JP7825888A JP2648332B2 JP 2648332 B2 JP2648332 B2 JP 2648332B2 JP 63078258 A JP63078258 A JP 63078258A JP 7825888 A JP7825888 A JP 7825888A JP 2648332 B2 JP2648332 B2 JP 2648332B2
- Authority
- JP
- Japan
- Prior art keywords
- tire
- absorbing layer
- sound absorbing
- composition
- foaming
- 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 - Lifetime
Links
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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、タイヤ車輪の転動下における車両の走行中
に路面凹凸に主として起因する振動をタイヤ最内層に発
泡ゴム組成物を配置することによって吸収させ、車内の
騒音を著しく小さくした空気入りラジアルタイヤの製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to disposing a foamed rubber composition in an innermost layer of a tire to cause vibration mainly caused by road surface irregularities during running of a vehicle under rolling of a tire wheel. The present invention relates to a method for manufacturing a pneumatic radial tire in which the noise inside the vehicle is significantly reduced.
（従来の技術） 従来車両の騒音を低下させる方法としては、例えば特
公昭58−53221号公報に車両リムの外周にダイナミック
ダンパーを設けて、その縦、及び横方向の共振周波数を
夫々タイヤの振動周波数と同調させることが開示され、
また米国特許第4392522号明細書にはタイヤの内圧空気
の充填空洞内の全体に或いは内面の一部分に配設した連
続気泡材料より成る騒音吸収手段を設けて騒音を低減す
る方法が開示されている。しかし従来の方法によるとタ
イヤ重量が著しく重くなり転がり抵抗が悪化したり、タ
イヤの耐久性及び騒音振動特性を緩和する効果が十分で
なかったりした。このため本出願人は特願昭61−301745
号（特開昭63−154410号）において低騒音化した空気入
りタイヤ及びその製法を提案した。このタイヤは一対の
サイドウォール部及びビード部と該サイドウォール間に
位置するトレッド部を備え、これらを実質上の半径面内
に平行配置した少なくとも一層のコードからなるカーカ
ス層と半径面内にインナーライナーを有し、該カーカス
層トレッド部の間に配置したベルト部で補強する低騒音
空気入りラジアルタイヤにおいて、インナーライナーの
半径面内内側、タイヤの最内層に発泡率が150％以上の
発泡ゴム組成物を配置し、前記ゴム発泡組成物をポリイ
ソブチレンゴム誘導体を30重量部以上含有するゴムを主
成分とし、下記式の 1.1≦A2xB A:発泡ゴム組成物のタイヤ内面カバー率 B:発泡ゴム組成物の平均厚さ を満足することによって、これまで解決することができ
なかった周波数が10Hz前後のピークに対応するバネ下共
振と260Hz近傍にわたるロードノイズの乗用者空気入り
ラジアルタイヤの振動乗心地性能を損ねる両振動特性
を、タイヤ重量の増加をわずかに押さえながら低減する
ことに成功している。(Prior Art) As a method of reducing the noise of a conventional vehicle, for example, Japanese Patent Publication No. 58-53221 discloses a method in which a dynamic damper is provided on the outer periphery of a vehicle rim and its longitudinal and lateral resonance frequencies are respectively measured by the tire vibration. Disclosed to be tuned to the frequency,
Also, U.S. Pat. No. 4,392,522 discloses a method for reducing noise by providing a noise absorbing means made of an open-cell material disposed in the whole or a part of the inner surface of a cavity filled with internal pressure air of a tire. . However, according to the conventional method, the tire weight becomes extremely heavy and the rolling resistance deteriorates, and the effect of reducing the durability and noise vibration characteristics of the tire is not sufficient. For this reason, the present applicant has filed Japanese Patent Application No. 61-301745.
No. (JP-A-63-154410) proposed a pneumatic tire with reduced noise and a method for producing the same. This tire has a pair of sidewall portions, a bead portion, and a tread portion located between the sidewalls, and a carcass layer composed of at least one cord in which these are arranged in parallel in a substantially radial plane, and an inner layer in a radial plane. In a low-noise pneumatic radial tire having a liner and reinforced by a belt portion disposed between the carcass layer tread portions, a foamed rubber having a foaming rate of 150% or more is formed inside the radial surface of the inner liner and the innermost layer of the tire. The composition is disposed, and the rubber foamed composition is mainly composed of a rubber containing 30 parts by weight or more of a polyisobutylene rubber derivative, and 1.1 ≦ A 2 xB A of the following formula: Tire inner surface coverage of the foamed rubber composition B: By satisfying the average thickness of the foamed rubber composition, a passenger pneumatic radial tire with unsprung resonance corresponding to a peak of around 10 Hz and road noise near 260 Hz which could not be solved until now. The two vibration characteristics that impair the ride comfort of the car have been successfully reduced while slightly suppressing the increase in tire weight.
（発明が解決しようとする課題） ところが上記特願昭61−301745号のタイヤの製法にお
いては、発泡ゴム組成物を通常のゴム組成物と同様のシ
ート状に成形してタイヤ製造工程にて貼りつけており、
このように通常のタイヤ成形作業まで問題ない程、該発
泡ゴム組成物のコンパウンドムーニー粘度を上げる（ML
1+4≧30,130℃）と通常の加硫工程での発泡率が150％を
超えることは極めて困難となる。またコンパウンドムー
ニー粘度が30未満となるとシートの粘着等の問題でタイ
ヤ成形作業が著しく非効率的となる。一方、すでに発泡
しているゴム組成物を貼るとインナーライナーとの接着
性が低下するばかりか、加硫時の高熱により該発泡ゴム
組成物が著しく劣化する。また加硫後のタイヤに貼りつ
ける場合は完全な手作業となり著しく多大な労力を要す
るといった問題点があった。(Problems to be Solved by the Invention) However, in the method of manufacturing a tire disclosed in Japanese Patent Application No. 61-301745, a foamed rubber composition is formed into a sheet shape similar to a normal rubber composition, and is applied in a tire manufacturing process. I have
As described above, the compound Mooney viscosity of the foamed rubber composition is increased so that there is no problem until the normal tire molding operation (ML
(1 + 4 ≧ 30,130 ° C.), and it is extremely difficult for the foaming rate in the ordinary vulcanization step to exceed 150%. If the compound Mooney viscosity is less than 30, the tire molding operation becomes extremely inefficient due to problems such as sticking of the sheet. On the other hand, when the foamed rubber composition is pasted, not only the adhesiveness to the inner liner is lowered, but also the foamed rubber composition is significantly deteriorated due to high heat during vulcanization. In addition, there is a problem that when sticking to a tire after vulcanization, complete manual work is required and a great deal of labor is required.
そこで本発明は、タイヤ製造工程において多大な労力
をかけることなく、ゴムタイヤの内面に発泡性ゴム組成
物より成る吸音層を効率的に形成して空気入りタイヤを
製造する方法を提供することを目的とする。Therefore, an object of the present invention is to provide a method for manufacturing a pneumatic tire by efficiently forming a sound-absorbing layer made of a foamable rubber composition on the inner surface of a rubber tire without applying much labor in the tire manufacturing process. And
（課題を解決するための手段） 本発明者らは空気入りタイヤ内面に設ける吸音層につ
き種々研究の結果、ポリマーと加硫剤を含有する組成物
Ａと、加硫促進剤と発泡剤を含有する組成物Ｂをあらか
じめ混合してつくった発泡性ゴム組成物を用いて吸音層
を形成することにより上記目的を達成し得ることを知見
し本発明を達成するに至った。(Means for Solving the Problems) As a result of various studies on the sound absorbing layer provided on the inner surface of the pneumatic tire, the present inventors have found that a composition A containing a polymer and a vulcanizing agent and a vulcanizing accelerator and a foaming agent are contained. It has been found that the above object can be achieved by forming a sound-absorbing layer using a foamable rubber composition prepared by previously mixing the composition B to be obtained, and the present invention has been accomplished.
従って本発明の吸音層を有する空気入りタイヤの製造
方法は、中空トロイド状をなすゴムタイヤの内面に発泡
率150％以上の発泡性ゴム組成物よりなる吸音層を備え
た空気入りタイヤを製造するに当たり、ポリマー及び加
硫剤を含有する組成物Ａと加硫促進剤及び発泡剤を含有
する組成物Ｂとをあらかじめ混合して上記発泡性ゴム組
成物を形成した後、前記発泡性ゴム組成物の加硫反応及
び発泡反応が進行する前に、該発泡性ゴム組成物を、加
硫したタイヤの内面の所定部位に塗布または噴霧し、吸
音層を形成することを特徴とする。Therefore, the method for manufacturing a pneumatic tire having a sound absorbing layer according to the present invention is suitable for manufacturing a pneumatic tire having a sound absorbing layer made of a foamable rubber composition having a foaming ratio of 150% or more on the inner surface of a rubber tire having a hollow toroidal shape. After preliminarily mixing the composition A containing the polymer and the vulcanizing agent with the composition B containing the vulcanization accelerator and the foaming agent to form the foamable rubber composition, Before the vulcanization reaction and the foaming reaction proceed, the foamable rubber composition is applied or sprayed to a predetermined portion on the inner surface of the vulcanized tire to form a sound absorbing layer.
本発明のタイヤの製造方法においては、吸音層を形成
するのに先立ってポリマーと加硫剤を含有する組成物Ａ
と加硫促進剤と発泡剤を含有する組成物Ｂを混合して発
泡率150％の発泡性ゴム組成物を形成する。発泡率を150
％以上に限定したのは、150％未満では、音を吸収する
効果が小さく、騒音を低減する効果がそれほど期待でき
ないからである。十分な効果を期待する為には発泡率を
250％以上にするとより良いのである。In the method for producing a tire according to the present invention, the composition A containing a polymer and a vulcanizing agent prior to forming the sound absorbing layer.
And a composition B containing a vulcanization accelerator and a foaming agent to form a foamable rubber composition having a foaming ratio of 150%. Foaming rate 150
The reason why the ratio is limited to not less than 150% is that if it is less than 150%, the effect of absorbing sound is small and the effect of reducing noise cannot be expected so much. In order to expect a sufficient effect, foaming rate
It is better to make it 250% or more.
また、発泡ゴムの発泡率VSは次の式 VS＝｛（ρ0−ρ9）／（ρ1−ρ9）−１｝×100（％） ……（１） で表され、ρ1は発泡ゴムの密度（g/cm3）、ρ0は発泡
ゴムのゴム固相部の密度（g/cm3）、ρ9は、発泡ゴムの
気泡内のガス部の密度（g/cm3）である。The foaming rate V S of the foamed rubber is represented by the following equation: V S = {(ρ 0 −ρ 9 ) / (ρ 1 −ρ 9 ) −1} × 100 (%) (1) 1 is the density of the foamed rubber (g / cm 3 ), ρ 0 is the density of the rubber solid phase of the foamed rubber (g / cm 3 ), and ρ 9 is the density of the gas part in the foamed rubber bubbles (g / cm 3 ). 3 ).
上記発泡性ゴム組成物を形成するのに用いる組成物Ａ
の必須成分であるポリマーとしては、天然ゴム，ポリイ
ソプレンゴム，ポリブタジエンゴム，スチレン−ブタジ
エン共重合体ゴム，エチレン−プロピレン−ジエン三元
共重合体ゴム（EPDM），アクリロニトリル−ブタジエン
ゴム（NBR）、イソブテン−イソプレンゴム（IIR）とそ
の誘導体、ポリイソブチレンゴム及びウレタンゴムの１
種または２種以上のブレンドがある。Composition A used to form the foamable rubber composition
Examples of the polymer which is an essential component of natural rubber, polyisoprene rubber, polybutadiene rubber, styrene-butadiene copolymer rubber, ethylene-propylene-diene terpolymer rubber (EPDM), acrylonitrile-butadiene rubber (NBR), Isobutene-isoprene rubber (IIR) and its derivatives, polyisobutylene rubber and urethane rubber
There are species or blends of two or more.
また加硫剤としては硫黄，モルフォリン・ジスルフィ
ド（大内新興化学（株）製、商品名バルノックＲ）およ
びアルキル・フェノール・ジスルフィド（ペンウォルト
社製、商品名バルタック５）等が用いられる。Examples of the vulcanizing agent include sulfur, morpholine disulfide (manufactured by Ouchi Shinko Chemical Co., Ltd., trade name: Barnock R) and alkylphenol disulfide (manufactured by Penwald, trade name: Baltac 5).
次に組成物Ｂに用いられる加硫促進剤および発泡剤は
常温以上の温度で反応を開始するものが使用される。加
硫促進剤としては、超促進剤、例えばジ−ｎ−ブチル−
ジチオカルバミン酸亜鉛（大内新興化学（株）製、商品
名：ノクセラーBZ）、ジエチル・ジチオカルバミン酸亜
鉛（大内新興化学（株）製、商品名：ノクセラーEZ）、
ジメチル・ジチオカルバミン酸亜鉛（大内新興化学
（株）製、商品名：ノクセラーPZ）等を用いるのが好ま
しく、更にこれらに準超促進剤、例えばｎ−ブチルアル
デヒド−アニリン縮合物（大内新興化学（株）製、商品
名：ノクセラー８）、ブチルアルデヒド−アセトアルデ
ヒド−ブチリデンアニリン反応物（モンサント社製、商
品名:A−100）、ブチルアルデヒド−モノブチルアミン
縮合物（デュポン社製、商品名：アクセラレイター83
3）等を併用するとよい。Next, the vulcanization accelerator and the foaming agent used in the composition B are those which start the reaction at a temperature of normal temperature or higher. As the vulcanization accelerator, a super accelerator, for example, di-n-butyl-
Zinc dithiocarbamate (Ouchi Shinko Chemical Co., Ltd., trade name: Noxeller BZ), zinc zinc dithiocarbamate (Ouchi Shinko Chemical Co., Ltd., trade name: Noxeller EZ),
It is preferable to use zinc dimethyl dithiocarbamate (trade name: Noxeller PZ, manufactured by Ouchi Shinko Chemical Co., Ltd.) and the like, and furthermore, a quasi-super accelerator such as an n-butyraldehyde-aniline condensate (Ouchi Shinko Chemical) Co., Ltd., trade name: Noxeller 8), butyraldehyde-acetaldehyde-butylideneaniline reactant (manufactured by Monsanto, trade name: A-100), butyraldehyde-monobutylamine condensate (manufactured by DuPont, trade name: Accelerator 83
3) etc. should be used together.
発泡剤としては、重炭酸アンモニウム、炭酸アンモニ
ウムと炭酸マグネシウムとの併用、重炭酸ナトリウムの
50％鉱油分散体（デュポン社製ユニセルS,ユニセルSX
等）、重炭酸ナトリウムのペースト（大内新興化学
（株）スポンジペーストNo.2）等を適宜用いる。As foaming agents, ammonium bicarbonate, a combination of ammonium carbonate and magnesium carbonate, sodium bicarbonate
50% mineral oil dispersion (Unicell S, Unicell SX manufactured by DuPont)
Etc.) and a paste of sodium bicarbonate (Ouchi Shinko Chemical Co., Ltd. Sponge Paste No. 2) is used as appropriate.
本発明においては、上記組成物Ａと組成物Ｂをあらか
じめ混合して発泡性ゴム組成物を作製し、この組成物を
加硫反応及び発泡反応が進行する前に空気入りタイヤの
内面の所定部位に、通常塗布又は噴霧により配設し、次
いで発泡と同時に起こる加硫反応において、インナーラ
イナー層と共加硫し、発泡性ゴム組成物層がタイヤ本体
と接着され吸音層が形成される。In the present invention, the composition A and the composition B are mixed in advance to prepare a foamable rubber composition, and the composition is subjected to a predetermined portion of the inner surface of the pneumatic tire before the vulcanization reaction and the foaming reaction proceed. Then, in a vulcanization reaction which is usually provided by coating or spraying and then simultaneously with foaming, co-vulcanization with the inner liner layer is performed, and the foamable rubber composition layer is adhered to the tire body to form a sound absorbing layer.
第１図（ａ），（ｂ）および（ｃ）は、上記本発明の
方法により製造されたタイヤ車輪の例を断面で示す図
で、図中１はゴムタイヤ、２はトレッド、３はリム、４
はトレッド２の内面にその円周にわたって設けた吸音層
である。第１図（ａ）は吸音層のラジアル方向端部がト
レッド端部より内側に配置された例を示し、第１図
（ｂ）は吸音層のラジアル方向端部がトレッド端部より
外側に延在する例を示す図である。これ等の例では第１
図（ｂ）のタイヤの吸音層が第１図（ａ）のタイヤの吸
音層よりはがれ易いので、吸音層は第１図（ａ）に示す
位置に配設するのが好ましい。また吸音層は第２図
（ａ）に示す吸音層に加えて、第２図（ｃ）に示すよう
にビード部内面に配設してもよい。1 (a), 1 (b) and 1 (c) are cross-sectional views showing an example of a tire wheel manufactured by the method of the present invention, in which 1 is a rubber tire, 2 is a tread, 3 is a rim, 4
Is a sound absorbing layer provided on the inner surface of the tread 2 over the circumference thereof. FIG. 1 (a) shows an example in which the radial end of the sound absorbing layer is disposed inside the tread end, and FIG. 1 (b) shows that the radial end of the sound absorbing layer extends outside the tread end. It is a figure showing an example. In these examples, the first
Since the sound absorbing layer of the tire of FIG. 1B is more easily peeled off than the sound absorbing layer of the tire of FIG. 1A, it is preferable to arrange the sound absorbing layer at the position shown in FIG. Further, in addition to the sound absorbing layer shown in FIG. 2 (a), the sound absorbing layer may be provided on the inner surface of the bead portion as shown in FIG. 2 (c).
吸音層の気泡は連続気泡であることが好ましいが、こ
れは独立気泡になると、泡の表面の膜が音を反射し、十
分な吸音効果が期待できないからである。The bubbles in the sound-absorbing layer are preferably open cells, because if they are closed cells, the film on the surface of the bubbles reflects sound and a sufficient sound-absorbing effect cannot be expected.
吸音層の厚さは1.5〜50.0mmが好ましいが、これは1.5
mm未満では、十分な吸音効果が期待できないからであ
り、逆に50.0mmを超えると、転がり抵抗を大きくした
り、吸音層内面に蓄えられる熱の為吸音層が部分的に破
壊され、ユニフォミティを低下させる原因となったりす
るからである。The thickness of the sound absorbing layer is preferably 1.5 to 50.0 mm, but this is 1.5
If it is less than 5 mm, a sufficient sound absorbing effect cannot be expected.If it exceeds 50.0 mm, on the other hand, the rolling resistance is increased or the sound absorbing layer is partially destroyed due to the heat stored on the inner surface of the sound absorbing layer, and the uniformity is reduced. This is because it may cause a decrease.
発泡性ゴム組成物より成る吸音層がタイヤ内部の空気
の体積の80％よりも多くなると、蓄えられる熱の為、シ
ョルダー部のコードが切断するような故障が起こり易く
なるので好ましくない。If the volume of the sound absorbing layer made of the foamable rubber composition is more than 80% of the volume of the air inside the tire, the stored heat is liable to cause a failure such as breaking of the cord of the shoulder portion, which is not preferable.
尚既に述べた如く、組成物Ｂの液中に含まれる加硫促
進剤及び発泡剤が常温以上で反応を開始するものでなく
てならないので、本発明の製法は加硫後のタイヤ内面に
組成物ＡおよびＢの両液を塗布又は噴霧することを特徴
としているためで、加硫後のタイヤは高温下にさらすと
劣化がおこり好ましくないのである。常温にて反応を開
始するものを使用するとタイヤに塗布又は噴霧した後、
数時間〜数日そのまま放置しておく間に発泡が起こり安
定するので塗布又は噴霧後何ら手間がかからない。また
加硫時に比し加圧されていないので、発泡率が容易に大
きくなる。As described above, the vulcanization accelerator and the foaming agent contained in the liquid of the composition B must start the reaction at room temperature or higher. This is characterized in that both liquids of the products A and B are applied or sprayed, so that if the vulcanized tire is exposed to a high temperature, it deteriorates, which is not preferable. If you use one that starts the reaction at room temperature, it is applied or sprayed on the tire,
Since foaming occurs and is stabilized during standing for several hours to several days, no trouble is required after coating or spraying. In addition, since the pressure is not increased as compared with the vulcanization, the foaming ratio is easily increased.
組成物Ａの液中に含まれる主ポリマーは発泡と同時に
起こる加硫反応において、インナーライナー層と共加硫
し発泡性ゴム組成物層がタイヤ本体と接着される。The main polymer contained in the composition A liquid is co-vulcanized with the inner liner layer in a vulcanization reaction that occurs simultaneously with foaming, and the foamable rubber composition layer is bonded to the tire body.
本発明では、組成物Ａが主ポリマー、加硫剤等、組成
物Ｂが加硫促進剤発泡剤等より成ると規定したが、基本
的には、両組成物が分離状態では各々安定で両組成物を
混合してはじめて反応が始まれば良いので、加硫剤と加
硫促進剤さえ別の液中に入っていれば、他の成分は自由
に変換してもかまわない。In the present invention, the composition A is defined to be composed of a main polymer, a vulcanizing agent and the like, and the composition B is composed of a vulcanization accelerator and a foaming agent. Since the reaction only needs to be started after the composition is mixed, other components may be freely converted as long as the vulcanizing agent and the vulcanization accelerator are in another liquid.
また、本発明は、タイヤ内面に塗布又は噴霧すること
に特徴を持っているので、組成物ＡとＢの状態は、溶媒
で希釈、エマルジョン化、ラテックス状、或いは液状
（粘稠状）のポリマーの使用等にすることにより、作業
上問題のない程度まで粘度低下させなくてはならない。Further, since the present invention is characterized in that the composition is applied or sprayed on the inner surface of the tire, the compositions A and B are prepared by diluting with a solvent, emulsifying, latex-like, or liquid (viscous) polymer. , The viscosity must be reduced to such an extent that there is no problem in operation.
（実施例） 本発明を実施例および比較例に基づいて詳細に説明す
る。(Examples) The present invention will be described in detail based on examples and comparative examples.
尚各例のタイヤのタイヤサイズは次の通りである。 The tire size of each example tire is as follows.
タイヤサイズ:215/60R15 実施例１ 通常の方法で成形、加硫したタイヤの内面の第１図
（ａ）に示す位置に表１の組成物ＡとＢを混合し、即座
に塗布した。その後室温にて１日放置し実施例１のタイ
ヤを得た。Tire size: 215 / 60R15 Example 1 Compositions A and B of Table 1 were mixed at the position shown in FIG. 1 (a) on the inner surface of a tire molded and vulcanized by a usual method, and immediately applied. Then, it was left at room temperature for one day to obtain the tire of Example 1.
比較例１ 通常の方法で成形、加硫したタイヤを比較例１のタイ
ヤとした。Comparative Example 1 A tire molded and vulcanized by an ordinary method was used as a tire of Comparative Example 1.
比較例２ 表１の組成物Ｂ中の発泡剤量を２重量部とした以外は
実施例１と同様な方法にて製造したタイヤを比較例２の
タイヤとした。Comparative Example 2 A tire manufactured in the same manner as in Example 1 except that the amount of the foaming agent in Composition B in Table 1 was changed to 2 parts by weight was used as a tire of Comparative Example 2.
実施例２ 表１の組成物Ｂ中の発泡剤量を20重量部とした以外
は、実施例１と同様な方法にて製造したタイヤを実施例
２のタイヤとした。Example 2 A tire manufactured in the same manner as in Example 1 except that the amount of the foaming agent in the composition B in Table 1 was 20 parts by weight was used as a tire of Example 2.
実施例３ 表１の組成物Ａ中のポリマーをスチレン・ブタジエン
ラテックス（日本合成ゴム（株）製0561）に変え、ゴム
揮を省いた他は実施例１と同様な方法にて製造したタイ
ヤを実施例３のタイヤとした。Example 3 A tire manufactured in the same manner as in Example 1 except that the polymer in the composition A of Table 1 was changed to styrene-butadiene latex (0561 manufactured by Nippon Synthetic Rubber Co., Ltd.) and rubber volatilization was omitted. The tire of Example 3 was used.
上記実施例および比較例の各タイヤの吸音層の発泡率
を次の表２に示す。 Table 2 below shows the foaming ratios of the sound absorbing layers of the tires of the above Examples and Comparative Examples.
上記実施例１〜３および比較例1,2で作製したタイヤ
につき車室内騒音テストを行い、得た結果を第２図
（ａ）〜（ｅ）に示す。第２図（ａ）は実施例１、第２
図（ｂ）は比較例１、第２図（ｃ）は比較例２、第２図
（ｄ）は実施例２、第２図（ｅ）は実施例３の結果をそ
れぞれ示す。尚車室内騒音テストは、ロードノイズ路を
40km/hr定常走行時の運転者の左側耳元の音を計測した
ものである（タイヤ内圧1.8kg/cm2）。 Car interior noise tests were performed on the tires manufactured in Examples 1 to 3 and Comparative Examples 1 and 2, and the obtained results are shown in FIGS. 2 (a) to 2 (e). FIG. 2A shows the first embodiment and the second embodiment.
2 (b) shows the results of Comparative Example 1, FIG. 2 (c) shows the results of Comparative Example 2, FIG. 2 (d) shows the results of Example 2, and FIG. 2 (e) shows the results of Example 3. The vehicle interior noise test was performed on road noise roads.
The sound at the left ear of the driver during steady running at 40 km / hr was measured (internal pressure of tire: 1.8 kg / cm 2 ).
（発明の効果） 以上説明してきたように、本発明によると組成物Ａお
よびＢからなる発泡率150％以上の発泡性組成物を用い
て吸音層を形成したことにより吸音層の形成が容易にな
った。また乗用車用空気入りラジアルタイヤの場合にし
ばしば250Hz近傍でロードノイズのピークがあらわれた
振動乗心地性能を著しく害するの対して本発明の方法に
より得られるタイヤでは第２図（ａ）〜（ｅ）に示すよ
うに230〜280Hzの周波数域の騒音を抑制できるという効
果が得られる。(Effect of the Invention) As described above, according to the present invention, the sound absorbing layer is formed using the foaming composition comprising the compositions A and B and having a foaming ratio of 150% or more, so that the sound absorbing layer can be easily formed. became. Also, in the case of pneumatic radial tires for passenger cars, road noise peaks often appear at around 250 Hz, which significantly impairs the vibration riding comfort. On the other hand, in the case of tires obtained by the method of the present invention, FIGS. 2 (a) to 2 (e) are shown. As shown in (1), the effect of suppressing noise in the frequency range of 230 to 280 Hz is obtained.
第１図（ａ），（ｂ）および（ｃ）は夫々本発明の方法
で製造した一例タイヤの断面図、 第２図（ａ）〜（ｅ）は夫々実施例1,比較例１、比較例
2,実施例2,実施例３で作製したタイヤの車室内騒音テス
トの結果を示すグラフである。 １…ゴムタイヤ、２…トレッド ３…リム、４…吸音層1 (a), (b) and (c) are cross-sectional views of an example tire manufactured by the method of the present invention, respectively, and FIGS. 2 (a) to (e) are Example 1, Comparative Example 1 and Comparative Example, respectively. An example
2 is a graph showing the results of a vehicle interior noise test of the tires manufactured in Examples 2 and 3. 1 ... rubber tire, 2 ... tread 3 ... rim, 4 ... sound absorbing layer
Claims (1)
発泡率150％以上の発泡性ゴム組成物よりなる吸音層を
備えた空気入りタイヤを製造するに当たり、 ポリマー及び加硫剤を含有する組成物Ａと加硫促進剤及
び発泡剤を含有する組成物Ｂとをあらかじめ混合して上
記発泡性ゴム組成物を形成した後、前記発泡性ゴム組成
物の加硫反応及び発泡反応が進行する前に、該発泡性ゴ
ム組成物を、加硫したタイヤの内面の所定部位に塗布ま
たは噴霧し、吸音層を形成することを特徴とする吸音層
を有する空気入りタイヤの製造方法。1. A composition comprising a polymer and a vulcanizing agent for producing a pneumatic tire having a sound absorbing layer made of a foamable rubber composition having a foaming ratio of 150% or more on the inner surface of a rubber tire having a hollow toroidal shape. A is preliminarily mixed with the composition B containing a vulcanization accelerator and a foaming agent to form the foamable rubber composition, and before the vulcanization reaction and the foaming reaction of the foamable rubber composition progress. A method for producing a pneumatic tire having a sound absorbing layer, wherein the foamable rubber composition is applied or sprayed onto a predetermined portion of an inner surface of a vulcanized tire to form a sound absorbing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63078258A JP2648332B2 (en) | 1988-04-01 | 1988-04-01 | Method for manufacturing pneumatic tire having sound absorbing layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63078258A JP2648332B2 (en) | 1988-04-01 | 1988-04-01 | Method for manufacturing pneumatic tire having sound absorbing layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01254411A JPH01254411A (en) | 1989-10-11 |
| JP2648332B2 true JP2648332B2 (en) | 1997-08-27 |
Family
ID=13656964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63078258A Expired - Lifetime JP2648332B2 (en) | 1988-04-01 | 1988-04-01 | Method for manufacturing pneumatic tire having sound absorbing layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2648332B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183877A (en) * | 2010-03-05 | 2011-09-22 | Bridgestone Corp | Tire |
| CN109070392A (en) * | 2016-03-31 | 2018-12-21 | 倍耐力轮胎股份公司 | For noise reduction elements to be applied to the method and apparatus for being used for the tire of wheel of vehicle and the tire equipped with this noise reduction elements |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7073382B2 (en) * | 2000-09-19 | 2006-07-11 | Michelin Recherehe Et Technique, S.A. | Method for designing a tire with reduced cavity noise |
| JP2003146005A (en) * | 2001-11-13 | 2003-05-21 | Kimihiro Yokose | Noise reducing tire wheel |
| KR20040036837A (en) * | 2002-10-25 | 2004-05-03 | 금호타이어 주식회사 | Pneumatic tire decreased road noise |
| JP4113084B2 (en) * | 2003-09-30 | 2008-07-02 | 東海ゴム工業株式会社 | Soundproof tire |
| JP4676710B2 (en) | 2004-03-22 | 2011-04-27 | 住友ゴム工業株式会社 | A shock absorber loaded in a tire lumen surrounded by a motorcycle tire and a rim. |
| JP4561292B2 (en) * | 2004-10-08 | 2010-10-13 | 横浜ゴム株式会社 | Pneumatic tire |
| KR100773947B1 (en) * | 2006-03-29 | 2007-11-07 | 금호타이어 주식회사 | The reduction method of tire vibration/noise using passive constrained-layer damping treatment |
| JP4891727B2 (en) * | 2006-10-11 | 2012-03-07 | 住友ゴム工業株式会社 | Pneumatic tire manufacturing method |
| JP5144981B2 (en) * | 2007-07-24 | 2013-02-13 | 株式会社ブリヂストン | Pneumatic tire manufacturing method and pneumatic tire |
| US20120073717A1 (en) * | 2010-09-24 | 2012-03-29 | Giorgio Agostini | Method for making pneumatic tire with foam noise damper |
| US20120125507A1 (en) * | 2010-11-24 | 2012-05-24 | Bormann Rene Louis | Tire with foamed noise damper |
| US20120125525A1 (en) * | 2010-11-24 | 2012-05-24 | Ramendra Nath Majumdar | Method for making pneumatic tire with foam noise damper |
| GB2526632B (en) | 2014-06-24 | 2016-04-13 | Gecko Rubber Ltd | Improvements in and relating to expanded rubber articles |
| WO2015198040A1 (en) * | 2014-06-24 | 2015-12-30 | Gecko Rubber Limited | Improvements in and relating to expanded rubber articles |
| EP3192669B1 (en) | 2014-09-12 | 2019-10-02 | Bridgestone Corporation | Pneumatic tire |
| DE102015213496A1 (en) * | 2015-07-17 | 2017-01-19 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| CN110450583A (en) * | 2019-06-13 | 2019-11-15 | 万力轮胎股份有限公司 | A kind of mute tire and preparation method thereof |
-
1988
- 1988-04-01 JP JP63078258A patent/JP2648332B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011183877A (en) * | 2010-03-05 | 2011-09-22 | Bridgestone Corp | Tire |
| CN109070392A (en) * | 2016-03-31 | 2018-12-21 | 倍耐力轮胎股份公司 | For noise reduction elements to be applied to the method and apparatus for being used for the tire of wheel of vehicle and the tire equipped with this noise reduction elements |
| CN109070392B (en) * | 2016-03-31 | 2021-05-14 | 倍耐力轮胎股份公司 | Method and apparatus for applying noise reducing elements to a tyre for vehicle wheels and tyre provided with such noise reducing elements |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01254411A (en) | 1989-10-11 |
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