JPH079807A - Pneumatic tire and its manufacture - Google Patents
Pneumatic tire and its manufactureInfo
- Publication number
- JPH079807A JPH079807A JP5150720A JP15072093A JPH079807A JP H079807 A JPH079807 A JP H079807A JP 5150720 A JP5150720 A JP 5150720A JP 15072093 A JP15072093 A JP 15072093A JP H079807 A JPH079807 A JP H079807A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- weight
- parts
- liner layer
- inner liner
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000006229 carbon black Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000004014 plasticizer Substances 0.000 claims abstract description 12
- 238000004073 vulcanization Methods 0.000 claims abstract description 9
- 229920005555 halobutyl Polymers 0.000 claims description 9
- 239000006082 mold release agent Substances 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 abstract description 20
- 238000000465 moulding Methods 0.000 abstract description 9
- -1 butyl halide Chemical class 0.000 abstract description 2
- 238000013329 compounding Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000010734 process oil Substances 0.000 description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 229920005557 bromobutyl Polymers 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 2
- KPAPHODVWOVUJL-UHFFFAOYSA-N 1-benzofuran;1h-indene Chemical compound C1=CC=C2CC=CC2=C1.C1=CC=C2OC=CC2=C1 KPAPHODVWOVUJL-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 235000019482 Palm oil Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002540 palm oil Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229940068124 pine tar Drugs 0.000 description 1
- 239000001794 pinus palustris tar oil Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 230000037303 wrinkles Effects 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
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
- B60C2005/147—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre characterised by the joint or splice
Landscapes
- Tires In General (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、タイヤ内側のインナー
ライナー層のスプライス部 (インナーライナー層の一端
と他端との継ぎ合わせ部) の故障を防止してタイヤ耐久
性を向上させると共に、タイヤ内面の外観を向上させ、
さらに、タイヤ成型時の作業性を向上させた空気入りタ
イヤ及びその製造法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents a failure of a splice portion (a joint portion between one end and the other end of an inner liner layer) of an inner liner layer inside a tire and improves tire durability. Improve the inner appearance,
Further, the present invention relates to a pneumatic tire having improved workability during tire molding and a method for manufacturing the pneumatic tire.
【０００２】[0002]
【従来の技術】一般に、空気入りタイヤを製造するに際
し、成型された未加硫タイヤ (グリーンタイヤ) を加硫
する前に、加硫工程中におけるゴム流れを良好にするた
め及び加硫後における加硫機のブラダーのタイヤ内面か
らの剥離性を向上させるために、前記未加硫タイヤの最
内層すなわちインナーライナー層に全面にわたって離型
剤、例えばグリーンインサイドペイント (ＧＩＰ) を塗
布している。なお、インナーライナー層は、ブチルゴム
のような非気体透過性のゴムからなるもので、タイヤ空
気圧を一定に保持するために、タイヤ内側に設けられて
いる。2. Description of the Related Art Generally, in manufacturing a pneumatic tire, before vulcanizing a molded unvulcanized tire (green tire), in order to improve the rubber flow during the vulcanization process and after vulcanization, In order to improve the releasability from the tire inner surface of the bladder of the vulcanizer, a mold release agent such as Green Inside Paint (GIP) is applied over the entire innermost layer, that is, the inner liner layer of the unvulcanized tire. The inner liner layer is made of a non-gas permeable rubber such as butyl rubber, and is provided inside the tire to keep the tire pressure constant.
【０００３】しかしながら、このように離型剤を未加硫
タイヤの内面に塗布した場合には、この離型剤がインナ
ーライナー層のスプライス部に浸入したり又はスプライ
ス部が離型剤を巻き込んだりして、これがため加硫に際
してスプライス部にクラックが発生し、タイヤ耐久性が
損なわれてしまう。そこで、従来、このようなスプライ
ス部の故障を防止するために、インナーライナー層のス
プライス部に、例えばポリエチレンフィルムあるいは粘
着テープからなるクラック防止用テープを貼り、離型剤
を塗布した後、加硫する前にこれらフィルム又はテープ
を剥がしていた。しかし、この場合、フィルム又はテー
プの貼り付けおよび剥がしの両作業を行わなければなら
ないためタイヤ成型時の作業性が煩雑となるという問題
があった。また、特開昭57‐8142号公報に記載されてい
るように、伸縮性を有する布帛にゴムをコーティングし
て構成したクラック防止用テープをインナーライナー層
のスプライス部に貼り付け、離型剤の塗布後、剥がすこ
となく加硫することも行われていた。しかし、この場合
においては、クラック防止用テープがタイヤ内面に残存
しているため、タイヤ内面の外観を著しく損なうという
問題があった。However, when the release agent is applied to the inner surface of the unvulcanized tire as described above, the release agent penetrates into the splice portion of the inner liner layer, or the release agent wraps around the release agent. As a result, cracking occurs in the splice portion during vulcanization, and tire durability is impaired. Therefore, conventionally, in order to prevent such a failure of the splice portion, a crack prevention tape made of, for example, a polyethylene film or an adhesive tape is attached to the splice portion of the inner liner layer, and a release agent is applied, followed by vulcanization. The film or tape had been peeled off before. However, in this case, there is a problem in that workability during tire molding becomes complicated because both work of attaching and peeling the film or tape must be performed. Further, as described in JP-A-57-8142, a crack prevention tape formed by coating a stretchable cloth with rubber is attached to the splice portion of the inner liner layer to remove the release agent. After application, it was also vulcanized without peeling. However, in this case, since the crack prevention tape remains on the inner surface of the tire, there is a problem that the appearance of the inner surface of the tire is significantly impaired.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、これらの問
題点を解消するためになされたものであって、タイヤ内
側のインナーライナー層のスプライス部の故障を防止し
てタイヤ耐久性を向上させると共に、タイヤ内面の外観
およびタイヤ成型時の作業性を向上させた空気入りタイ
ヤ、特に重荷重用空気入りタイヤ及びその製造法を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and improves the durability of the tire by preventing the failure of the splice portion of the inner liner layer inside the tire. At the same time, it is an object of the present invention to provide a pneumatic tire having improved inner appearance of the tire and workability during tire molding, in particular, a heavy-duty pneumatic tire and a manufacturing method thereof.
【０００５】[0005]
【課題を解決するための手段】本発明の空気入りタイヤ
は、ハロゲン化ブチルゴム100重量部に対しカーボンブ
ラック50重量部〜70重量部、可塑剤および／又は樹脂20
重量部〜40重量部を含むゴム組成物からなるシートで、
タイヤ内側のインナーライナー層のスプライス部を被覆
してなることを特徴とする。The pneumatic tire of the present invention comprises 50 parts by weight to 70 parts by weight of carbon black, 100 parts by weight of halogenated butyl rubber, a plasticizer and / or a resin.
A sheet made of a rubber composition containing from 40 to 40 parts by weight,
It is characterized by covering the splice part of the inner liner layer inside the tire.
【０００６】また、本発明の空気入りタイヤの製造法
は、未加硫ゴムからなるグリーンタイヤの内側のインナ
ーライナー層のスプライス部を、ハロゲン化ブチルゴム
100重量部に対しカーボンブラック50重量部〜70重量
部、可塑剤および／又は樹脂20重量部〜40重量部を含む
ゴム組成物からなるシートで被覆し、ついで該グリーン
タイヤの内面に離型剤を塗布した後、加硫を行なうこと
からなることを特徴とする。Further, in the pneumatic tire manufacturing method of the present invention, a halogenated butyl rubber is used for the splice portion of the inner liner layer inside the green tire made of unvulcanized rubber.
A sheet made of a rubber composition containing 50 parts by weight to 70 parts by weight of carbon black, 20 parts by weight to 40 parts by weight of a plasticizer and / or a resin is coated on 100 parts by weight, and then a release agent is applied to the inner surface of the green tire. Is applied, and then vulcanization is performed.
【０００７】このように本発明では、特定のゴム組成物
からなるシートでタイヤのインナーライナー層のスプラ
イス部を被覆するために、グリーンタイヤの内面に塗布
される離型剤のスプライス部への接触が断たれるので、
離型剤によるスプライス部の故障を防止することが可能
となる。また、本発明では、タイヤ加硫後において、ス
プライス部を被覆したシートがスプライス部と一体化し
て識別できなくなるので、タイヤ内面の外観を向上させ
ることができる。さらに、本発明では、スプライス部の
被覆のためにスプライス部にシートを貼付けるだけで貼
付後にシートを剥がすことがないので従来に比して手間
が省けるから成型時の作業性を向上させることができ
る。As described above, in the present invention, in order to cover the splice portion of the inner liner layer of the tire with the sheet made of the specific rubber composition, the release agent applied to the inner surface of the green tire comes into contact with the splice portion. Is cut off,
It is possible to prevent the failure of the splice portion due to the release agent. Further, in the present invention, after the tire is vulcanized, the sheet covering the splice portion is integrated with the splice portion and cannot be identified, so that the appearance of the inner surface of the tire can be improved. Furthermore, in the present invention, since the sheet is not peeled off after pasting only by pasting the sheet on the splice portion for covering the splice portion, it is possible to improve the workability at the time of molding since labor is saved as compared with the conventional case. it can.
【０００８】以下、図を参照して本発明の構成につき詳
しく説明する。図１は本発明の空気入りタイヤの一例の
子午線方向半断面説明図である。図１において、左右一
対のビードコア１, １間にカーカス層２が装架され、こ
のカーカス層２の内側のタイヤ内面には、インナーライ
ナー層３が設けられている。インナーライナー層３は、
ブチルゴムからなる。The structure of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a meridional direction half-section explanatory view of an example of a pneumatic tire of the present invention. In FIG. 1, a carcass layer 2 is mounted between a pair of left and right bead cores 1, 1 and an inner liner layer 3 is provided on the inner surface of the tire inside the carcass layer 2. The inner liner layer 3 is
Made of butyl rubber.
【０００９】このインナーライナー層３では、図２に示
すように、その一端と他端とが重なり合ってスプライス
部４を形成している。本発明では、図３に示すように、
スプライス部４をシート５で被覆している。シート５
は、ハロゲン化ブチルゴム100重量部に対しカーボンブ
ラック50重量部〜70重量部、好ましくは55重量部〜65重
量部、可塑剤および／又は樹脂20重量部〜40重量部、好
ましくは25重量部〜35重量部を含むゴム組成物からな
る。In this inner liner layer 3, as shown in FIG. 2, one end and the other end overlap to form a splice portion 4. In the present invention, as shown in FIG.
The splice part 4 is covered with a sheet 5. Sheet 5
Is 50 parts by weight to 70 parts by weight, preferably 55 parts by weight to 65 parts by weight, plasticizer and / or resin 20 parts by weight to 40 parts by weight, preferably 25 parts by weight to 100 parts by weight of halogenated butyl rubber. It consists of a rubber composition containing 35 parts by weight.
【００１０】ハロゲン化ブチルゴムは、例えば、塩素化
ブチルゴム、臭素化ブチルゴムなどである。一般の市販
品を用いればよい。カーボンブラックは、通常使用され
ているものでよく、例えば、ＧＰＦ、ＦＥＦ、ＳＲＦな
どのソフトカーボンブラック、およびＨＡＦ、ＩＳＡ
Ｆ、ＳＡＦなどのハードカーボンブラックなどである。The halogenated butyl rubber is, for example, chlorinated butyl rubber or brominated butyl rubber. A general commercial product may be used. The carbon black may be a commonly used one, for example, soft carbon black such as GPF, FEF, SRF, and HAF, ISA.
Hard carbon black such as F and SAF.
【００１１】可塑剤もまた特定されるものではなく、例
えば、芳香族系プロセスオイル、ナフテン系プロセスオ
イル、パラフィン系プロセスオイル、パインタール、パ
ーム油等の天然可塑剤、およびジブチルフタレート等の
フタル酸誘導体などの合成可塑剤などである。樹脂は、
可塑性を有するものであればよく、例えば、フェノール
ホルムアルデヒド樹脂、パラフィン系樹脂（石油樹脂）
などの合成樹脂、クマロン・インデン樹脂、ウッドロジ
ン、トール油変性ロジン、ミネラルラバーなどの天然樹
脂である。The plasticizer is also not specified, and examples thereof include aromatic process oils, naphthenic process oils, paraffinic process oils, natural plasticizers such as pine tar and palm oil, and phthalic acid such as dibutyl phthalate. Examples include synthetic plasticizers such as derivatives. The resin is
Any resin having plasticity may be used, and examples thereof include phenol formaldehyde resin and paraffin resin (petroleum resin).
It is a natural resin such as synthetic resin, coumarone indene resin, wood rosin, tall oil modified rosin and mineral rubber.
【００１２】カーボンブラックの配合量は、ハロゲン化
ブチルゴム100重量部に対し、50重量部〜70重量部であ
る。50重量部未満では、グリーン強度が低く、ゴム又は
そのシートがいわゆる腰の弱い状態となり、貼付け時に
伸び易いか又は末端部が丸まり易いような状態となり、
作業性に不具合を生じる。また、70重量部を超えるとグ
リーン強度が高くなることにより貼付作業性に不具合を
生じることがある。さらに、ゴム又はそのシートの腰が
強すぎるためにインナーライナー層へのなじみが低下
し、シートの剥がれなど不具合となる。The blending amount of carbon black is 50 to 70 parts by weight with respect to 100 parts by weight of halogenated butyl rubber. If it is less than 50 parts by weight, the green strength is low, the rubber or the sheet thereof is in a so-called weak state, and it tends to be stretched at the time of sticking or the end portion is easily rounded,
This causes a problem in workability. Further, if the amount exceeds 70 parts by weight, the green strength becomes high, which may cause a problem in sticking workability. Further, since the rubber or the sheet thereof is too stiff, the conformability to the inner liner layer is reduced, and the sheet is peeled off.
【００１３】可塑剤および／又は樹脂の配合量は、ハロ
ゲン化ブチルゴム100重量部に対し20重量部〜40重量部
である。20重量部未満ではカーボンブラック70重量部を
超した配合と同じ状況となり、一方、40重量部を超える
とカーボンブラック50重量部未満の配合と同じ状況とな
るからである。このようにしてなるゴム組成物には、必
要に応じて、イオウなどの加硫剤等の他の配合剤を任意
に配合することができる。The compounding amount of the plasticizer and / or resin is 20 to 40 parts by weight with respect to 100 parts by weight of halogenated butyl rubber. This is because if it is less than 20 parts by weight, the situation is the same as when the composition exceeds 70 parts by weight of carbon black, while if it exceeds 40 parts by weight, the situation is the same as if the composition is less than 50 parts by weight of carbon black. The rubber composition thus formed may optionally contain other compounding agents such as a vulcanizing agent such as sulfur.
【００１４】本発明で用いるシート５は、このゴム組成
物からなるものであって、その厚さは0.２mm〜0.５mm、
幅ｄは30mm〜100mm であるとよい。このようにしてなる
本発明の空気入りタイヤを製造するには、未加硫ゴムか
らなるグリーンタイヤの内側のインナーライナー層３の
スプライス部４を、厚さ0.２mm〜0.５mm、幅30mm〜100m
m のシート５で被覆し、ついでこのグリーンタイヤの内
面に、すなわちインナーライナー層３の表面およびスプ
ライス部４を被覆したシート５の表面に、好ましくは全
面に亘って離型剤を塗布した後、このグリーンタイヤを
常法によって加硫することによればよい。シート５の厚
さが0.２mm未満では、薄すぎるためスプライス部に沿っ
て離型剤を巻き込んでしまう。一方、0.５mmを超えると
厚すぎるためシートのエッジ部分で離型剤を巻き込むこ
とになる。また、シート５の幅が30mm未満では、スプラ
イス部を完全に被覆することが難しくなるので、離型剤
がスプライス部に付着する可能性がある。シート５の幅
が100mm を超えるとスプライス部への離型剤の付着はな
くなるものの貼付け作業が難しく、シワになり易い等の
不具合が生じてしまう。The sheet 5 used in the present invention is made of this rubber composition and has a thickness of 0.2 mm to 0.5 mm,
The width d is preferably 30 mm to 100 mm. In order to manufacture the pneumatic tire of the present invention thus formed, the splice portion 4 of the inner liner layer 3 inside the green tire made of unvulcanized rubber has a thickness of 0.2 mm to 0.5 mm and a width of 30 mm. ~ 100m
After coating with m 5 of the sheet 5, then the inner surface of the green tire, that is, the surface of the inner liner layer 3 and the surface of the sheet 5 coated with the splice portion 4, preferably the entire surface is coated with a release agent, The green tire may be vulcanized by a conventional method. If the thickness of the sheet 5 is less than 0.2 mm, it is too thin and the release agent is caught along the splice portion. On the other hand, when the thickness exceeds 0.5 mm, the release agent is involved in the edge portion of the sheet because it is too thick. Further, if the width of the sheet 5 is less than 30 mm, it is difficult to completely cover the splice portion, so that the release agent may adhere to the splice portion. When the width of the sheet 5 exceeds 100 mm, the release agent does not adhere to the splice portion, but the attaching work is difficult and problems such as wrinkles easily occur.
【００１５】[0015]
【実施例】表１に示す配合内容 (重量部) でシートを作
製し (実施例１〜３、比較例１〜８) 、このシートをタ
イヤサイズIIR22.5 14PRのグリーンタイヤの内側のイン
ナーライナー層のスプライス部に貼り付けてスプライス
部を被覆した後、このグリーンタイヤの内面に離型剤を
塗布し、ついで常法により加硫を行って空気入りラジア
ルタイヤを製造した。この空気入りラジアルタイヤにつ
いて、下記によりタイヤ内面の外観、タイヤ成型時の作
業性、スプライス部の故障状況を評価した。この結果を
表１に示す。[Examples] Sheets were prepared according to the formulation contents (parts by weight) shown in Table 1 (Examples 1 to 3 and Comparative Examples 1 to 8), and the sheets were used as an inner liner inside a green tire having a tire size of IIR22.5 14PR. After affixing to the splice part of the layer to cover the splice part, a release agent was applied to the inner surface of this green tire, and then vulcanization was carried out by a conventional method to produce a pneumatic radial tire. With respect to this pneumatic radial tire, the appearance of the inner surface of the tire, workability during tire molding, and failure status of the splice portion were evaluated as follows. The results are shown in Table 1.
【００１６】なお、表１において、ハロゲン化ブチルゴ
ムとしては臭素化ブチルゴム (エクソン社製2244) を、
可塑剤としてはパラフィン系オイル（昭和シェル製マシ
ン油22) を、樹脂としては石油系樹脂（エッソ化学製エ
スコレッツ1102) をそれぞれ用いた。可塑剤と樹脂との
配合比 (重量) は50：50である。タイヤ内面の外観 ：加硫後にタイヤ内面をチェックし、
離型剤の塗布状態、離型剤のスプライス部巻き込み状況
等のチエックを行ない、１〜５点でランク付けを行なっ
た。3.５点以上を外観良好とした。In Table 1, brominated butyl rubber (2244 manufactured by Exxon) was used as the halogenated butyl rubber.
Paraffin-based oil (Machine oil 22 manufactured by Showa Shell) was used as the plasticizer, and petroleum-based resin (ESCOLETS 1102 manufactured by Esso Kagaku) was used as the resin. The compounding ratio (weight) of the plasticizer and the resin is 50:50. Appearance of tire inner surface : Check the tire inner surface after vulcanization,
The applied state of the release agent, the state of the release agent involved in the splice portion, and the like were checked, and ranked from 1 to 5 points. A score of 3.5 or more was regarded as good appearance.
【００１７】タイヤ成型時の作業性：品質同様に重要な
因子であり、タイヤ成型時での貼付け作業性をチェック
した。カーボンブラック量が多くなるとグリーン強度が
高く、インナーライナー層への追従性 (なじみ) が低下
する。逆にカーボンブラック量が少ない場合には、グリ
ーン強度が低く、いわゆる腰の弱い状態となり、端末部
のまるまり等が生じ、作業性が悪化する。OK（作業性
良）、NG（作業性不良）で評価した。 Workability during tire molding : It is an important factor as well as quality, and the workability of sticking during tire molding was checked. When the amount of carbon black is large, the green strength is high and the conformability to the inner liner layer (familiarity) is reduced. On the other hand, when the amount of carbon black is small, the green strength is low, and the so-called weak waist is formed, and the terminal portion is rounded and the workability is deteriorated. It was evaluated as OK (good workability) and NG (poor workability).
【００１８】スプライス部の故障状況：JATMA (日本タ
イヤ協会規格) にて規定される所定のリム、空気圧で室
内走行テストを実施した。走行後のタイヤのインナーラ
イナー層のスプライス部でのクラック発生を評価し、OK
（故障なし）、NG（故障あり）で判断した。上記外観テ
スト (静的なチェック) では分らなかったクラックは、
走行により伸縮が加わった後に成長し、目視で判別でき
る状態となる。 Failure status of splice part : An indoor running test was conducted with a predetermined rim and air pressure specified by JATMA (Japan Tire Association Standard). Evaluate the occurrence of cracks at the splice part of the inner liner layer of the tire after running, OK
Judged as (no failure) and NG (failure). The cracks that were not found in the above appearance test (static check) are
It grows after expansion and contraction due to running, and is in a state where it can be visually identified.
【００１９】 表１から明らかなように、本発明の場合 (実施例１〜
３) 、外観、作業性、故障状況のいずれにおいても優れ
ていることがわかる。[0019] As is clear from Table 1, in the case of the present invention (Examples 1 to 1)
3) It can be seen that it is excellent in terms of appearance, workability, and failure condition.
【００２０】[0020]
【発明の効果】以上説明したように本発明によれば、特
定のゴム組成物からなるシートでタイヤのインナーライ
ナー層のスプライス部を被覆するために、スプライス部
の故障を防止してタイヤ耐久性を向上させ得ると共に、
タイヤ内面の外観およびタイヤ成型時の作業性を向上さ
せることが可能となる。As described above, according to the present invention, since the splice portion of the inner liner layer of the tire is covered with the sheet made of the specific rubber composition, the splice portion is prevented from being damaged and the tire durability is improved. Can improve
It is possible to improve the appearance of the inner surface of the tire and workability during tire molding.
【図１】本発明の空気入りタイヤの一例の子午線方向半
断面説明図である。FIG. 1 is a meridional direction half-section explanatory view of an example of a pneumatic tire of the present invention.
【図２】タイヤ内側のインナーライナー層のスプライス
部を示す斜視説明図である。FIG. 2 is a perspective explanatory view showing a splice portion of an inner liner layer inside a tire.
【図３】スプライス部をシートで被覆した様子を示す断
面説明図である。FIG. 3 is an explanatory cross-sectional view showing a state in which a splice portion is covered with a sheet.
１ ビードコア ２ カーカス層 ３ インナーライナー層 ４ スプライス部 ５ シート。 1 Bead core 2 Carcass layer 3 Inner liner layer 4 Splice part 5 Sheet.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｋ 21:00 105:24 Ｂ２９Ｌ 30:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location // B29K 21:00 105: 24 B29L 30:00
Claims (2)
カーボンブラック50重量部〜70重量部、可塑剤および／
又は樹脂20重量部〜40重量部を含むゴム組成物からなる
シートで、タイヤ内側のインナーライナー層のスプライ
ス部を被覆してなる空気入りタイヤ。1. 50 to 70 parts by weight of carbon black, 100 parts by weight of halogenated butyl rubber, a plasticizer and / or
Alternatively, a pneumatic tire obtained by covering a splice part of an inner liner layer inside a tire with a sheet made of a rubber composition containing 20 to 40 parts by weight of a resin.
側のインナーライナー層のスプライス部を、ハロゲン化
ブチルゴム100重量部に対しカーボンブラック50重量部
〜70重量部、可塑剤および／又は樹脂20重量部〜40重量
部を含むゴム組成物からなるシートで被覆し、ついで該
グリーンタイヤの内面に離型剤を塗布した後、加硫を行
なうことからなる空気入りタイヤの製造法。2. The splicing part of the inner liner layer inside the green tire made of unvulcanized rubber is 50 to 70 parts by weight of carbon black, 100 parts by weight of halogenated butyl rubber, 20 parts by weight of a plasticizer and / or resin. Part to 40 parts by weight of a rubber composition, and then a mold release agent is applied to the inner surface of the green tire, followed by vulcanization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150720A JPH079807A (en) | 1993-06-22 | 1993-06-22 | Pneumatic tire and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150720A JPH079807A (en) | 1993-06-22 | 1993-06-22 | Pneumatic tire and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH079807A true JPH079807A (en) | 1995-01-13 |
Family
ID=15502941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5150720A Pending JPH079807A (en) | 1993-06-22 | 1993-06-22 | Pneumatic tire and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079807A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100425835B1 (en) * | 2001-08-28 | 2004-04-03 | 금호타이어 주식회사 | Tire having Law rate on upper part compare with lower part of the Innerliner |
| WO2007129680A1 (en) * | 2006-05-01 | 2007-11-15 | The Yokohama Rubber Co., Ltd. | Pneumatic tire having flexible protective release layer |
| JP2009242537A (en) * | 2008-03-31 | 2009-10-22 | Toyo Tire & Rubber Co Ltd | Rubber composition for inner liner joint tape and pneumatic tire |
| JP2011245766A (en) * | 2010-05-27 | 2011-12-08 | Bridgestone Corp | Method for using film-rubber composite in tire |
-
1993
- 1993-06-22 JP JP5150720A patent/JPH079807A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100425835B1 (en) * | 2001-08-28 | 2004-04-03 | 금호타이어 주식회사 | Tire having Law rate on upper part compare with lower part of the Innerliner |
| WO2007129680A1 (en) * | 2006-05-01 | 2007-11-15 | The Yokohama Rubber Co., Ltd. | Pneumatic tire having flexible protective release layer |
| JP2009242537A (en) * | 2008-03-31 | 2009-10-22 | Toyo Tire & Rubber Co Ltd | Rubber composition for inner liner joint tape and pneumatic tire |
| JP2011245766A (en) * | 2010-05-27 | 2011-12-08 | Bridgestone Corp | Method for using film-rubber composite in tire |
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