JPH0353403B2 - - Google Patents
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- Publication number
- JPH0353403B2 JPH0353403B2 JP61080095A JP8009586A JPH0353403B2 JP H0353403 B2 JPH0353403 B2 JP H0353403B2 JP 61080095 A JP61080095 A JP 61080095A JP 8009586 A JP8009586 A JP 8009586A JP H0353403 B2 JPH0353403 B2 JP H0353403B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- coating material
- thixotropic
- rubber chip
- paint
- 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
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Description
［産業上の利用分野］
本発明は、例えば競技用トラツク、テニスコー
ト等に用いられる、透水性と適度な弾性を兼備し
た透水性弾性舗装体に関するもので、更に詳しく
は、その表面の耐久性並びに外観の向上に関す
る。
［従来の技術］
従来、透水性弾性舗装体は、透水性アスフアル
トコンクリート層上に、加硫ゴムチツプを各チツ
プ間に空隙を残して、例えばポリウレタン等の可
撓性合成樹脂のバインダーで相互に連結したゴム
チツプ層を設け、このゴムチツプ層の表面に直接
塗料を塗布して塗料層を設けたものとなつてい
る。塗料層は、艶消し仕上げによる外観の向上を
図ると共に、耐候性、耐摩耗性、すべり止性等を
付与するためのもので、例えばウレタン系、アク
リル系等の塗料が使用されている。
［発明が解決しようとする問題点］
しかしながら、上記ゴムチツプ層上に直接塗料
層を設けた従来の透水性弾性舗装体は、微視的に
見ると、ゴムチツプ層の表面に位置する各加硫ゴ
ムチツプ上に分かれて塗料層が形成されており、
塗料層が微小面積毎に形成されている関係上、ゴ
ムチツプ層に対する塗料層の接合力が弱い。ま
た、同様の理由から、塗料層を厚くしにくく、こ
れらのことから、次の表面の耐久性並びに外観上
の問題を生じている。
第一に、使用頻度の高い部分の塗料層に摩耗や
剥れを生じやすく、短期間の使用で塗料層の塗り
直しを行わなければならなくなつている。第二に
塗料層を摩耗した状態で使用するとゴムチツプ層
表面の強度が低下し、ゴムチツプの欠落が発生し
やすくなる。第三に、ゴムチツプ層敷設時の打ち
継ぎ部を十分塗料層で覆い隠すことができず、こ
の継目が明瞭なラインとして残り、外観を悪化さ
せている。
［問題点を解決するための手段］
上記問題点を解決するために講じられた手段
を、本発明に係る透水性弾性舗装体の層構成の概
略を示す第１図及び第２図で説明すると、ゴムチ
ツプ層１上に、揺変性塗布材を塗布硬化させた塗
布材層２が、ゴムチツプ層１表面の一部の空隙３
を覆つて形成されている透水性弾性舗装体とする
こと（以下「第一発明」という）及び、上記塗布
材層２上に更に塗料層４が形成されている透水性
弾性舗装体とすること（以下「第二発明」とい
う）である。
本発明におけるゴムチツプ層１は、従来のもの
と同様なもので、直径１〜４mm程度の大きさのも
のを中心とした加硫ゴムチツプを、例えばポリウ
レタン等の可撓性合成樹脂のバインダーで、各チ
ツプ間に空隙３を残して相互に連結したものであ
る。
塗布硬化されて塗布材層２を構成する揺変性塗
布材は、塗布後の硬化が可能であると共に、未硬
化時に、塗布できる程度の流動性ゾル状とするこ
とができ、また静置状態でゴムチツプ層１上から
簡単に流れない程度のゲル状となるものであれ
ば、硬化可能な揺変性組成物単独でも、更にこれ
に粒体等を加えたものであつてもよい。
揺変性塗布材に用いる揺変性組成物は、硬化後
のゴムチツプ層１や塗料層４との接着性を考える
と、ポリウレタン樹脂、弾性エポキシ樹脂、アク
リル樹脂等を主成分とするものが好ましい。揺変
性を付与する材料としては、例えばシリカ粉末、
酸化ポリエチレン非晶体粉末、クレー、水素添加
ヒマシ油等を挙げることができる。また、揺変性
組成物には、上記成分の他、例えば着色剤、紫外
線吸収剤等、ゴムチツプ層１の耐久性並びに外観
等を向上させるに必要な各種添加剤を加えること
ができる。
揺変性塗布材は、上記揺変性組成物に粒体、特
に弾性粒体を混合したもであることが好ましい。
弾性粒体を混合しておくと、塗布材層２に、脱落
しにくい弾性のある細かな凹凸が形成され、第一
発明においては、表面の仕上り外観及び湿潤時の
すべり止め性が向上する。また、塗料層４の表面
にも上記凹凸に沿つた凹凸が形成されるので、第
二発明においても同様の利益が得られる。
上記弾性粒体としては、例えば発泡ポリウレタ
ン粒子、加硫ゴムチツプ等を用いることができ
る。この弾性粒体は、粒径0.2〜2.0mm、最適には
0.5〜１mmのものを、揺変性組成物100重量部に対
して、発泡ポリウレタン粒子の場合５〜10重量
部、加硫ゴムチツプの場合10〜15重量部加えるこ
とが好ましい。粒系が小さ過ぎたり添加量が少な
過ぎると、弾性粒体を加える意味が薄れ、逆に粒
径が大き過ぎたり添加量が多過ぎると、例えば吹
き付けによる塗布がしにくくなつたりゴムチツプ
層１の透水性を阻害しやすくなる。
塗布材層２は、揺変性塗布材をゾル状化して、
ゴムチツプ層１の表面に、例えば吹き付け等によ
つて塗布し硬化させることによつて形成されてい
るものである。この塗布材層２は、実用上必要な
透水性を維持するために、ゴムチツプ層１表面の
一部の空隙のみを覆つているもので、塗布材層２
付設前に対して、付設後のゴムチツプ層１表面の
空隙が10〜30％程度残されていることが好まし
い。
揺変性塗布材の塗布量は、第一発明及び第二発
明共に1.0〜1.5Kg／m2程度が好ましい。塗布量が
少な過ぎるとゴムチツプ層１表面の耐久性及び外
観の向上が不十分となりやすく、逆に多過ぎると
ゴムチツプ層１の透水性を阻害しやすくなる。ま
た、この塗布時に、塗布を容易にするため、揺変
性塗布材に有機溶剤を添加してもよい。有機溶剤
は、揺変性塗布材中の成分や弾性粒体と反応しな
いものを選択する。
第二発明における塗料層４は、従来のものと同
様なものでよく、例えばウレタン系、アクリル系
等の塗料で、しかも可撓性のあるものが好適に使
用される。この塗布量は、透水性を阻害しない範
囲で選択すればよいが、200〜30ｇ／m2が適当で
ある。
［作用］
塗布材層２を構成する揺変性塗布材をゴムチツ
プ層１の表面に塗布すると、揺変性を有するため
に、比較的大きな空隙３は残されるが、比較的小
さな空隙３は揺変性塗布材で覆われる。このた
め、ゴムチツプ層１が部分的に目止めされた状態
となつて厚みのある塗膜が得られ、厚い塗布材層
２が形成される一方、実用上必要な透水性は残さ
れた空隙３によつて維持される。また、塗布材層
２の一部が、覆つている空隙３内にくさび状に入
り込み、塗布材層２はゴムチツプ層１上に強固に
付着する。
第一発明においては、塗布材層２が表面の仕上
げ層となる。この塗布材層２は、上述のように厚
くしかもゴムチツプ層１の表面に強固に付着する
ので、塗布材層２の剥離や摩滅を生じにくいと共
に、ゴムチツプの脱落も防止されて、表面の耐久
性が向上する。また、ゴムチツプ層１の打ち継ぎ
部を覆い隠すことができ、外観を向上させること
ができる。
第二発明においては、塗布材層２と、この上に
設けられた塗料層４の二層が表面仕上げ層となつ
ている。塗料層４は、いわば塗布材層２でゴムチ
ツプ層１を部分的に目止めした上に設けられるの
で、厚く剥離しにくいものにできる。そして塗料
は、揺変性塗布材に比して、例えば色、艶消し状
態、すべり止め性等を調整しやすいので、塗料層
４を設けることにより、これらを更に微妙に調整
できる。
［実施例］
実施例 １
ゴムチツプ層１上に、下記のＡ成分100重量部
とＢ成分235重量部をを混合した揺変性組成物単
独の揺変性塗布材を、1.3Kg／m2リシンガンにて
吹き付け塗布した後硬化させて塗布材層２とし、
表面仕上げを行つた。この透水性弾性舗装体の透
水性、塗布材層２の厚さ、滑り抵抗性を第１表に
示す。
−揺変性組成物−
Ａ成分
ウレタンプレポリマー NCO（ポリプロピレング
リコールの末端T.D.I.アダクト） ５％
Ｂ成分
キユアミンMT（イハラケミカル社製ウレタン用
アミン硬化剤） 15重量部
D.O.P. 60 〃
クロムオキサイドグリーン ８ 〃
シリカ超微粉末 ７ 〃
炭酸カルシウム 60 〃
トルエン 85 〃
実施例 ２
実施例１で形成した塗布材層２上に、可撓性を
有し、艶消し仕上げとなるウレタン系塗料を0.25
Kg／m2エアレススプレーヤーで吹き付け塗布して
塗料層４を形成して、塗布材層２と塗料層４の二
層による表面仕上げを行つた。この透水性弾性舗
装体の透水性、塗布材料２及び塗料層４の厚さ、
滑り抵抗性を第１表に示す。
実施例 ３
揺変性組成物を、下記のＡ成分100重量部とＢ
成分223重量部を混合したものとし、これに更に
下記弾性粒体40重量部を混合した揺変性塗布材で
塗布材層３を形成した他は実施例１と同様にして
表面仕上げを行つた。この透水性弾性舗装体の透
水性、塗布材層２の厚さ、滑り抵抗性を第１表に
示す。
−揺変性組成物−
Ａ成分
ウレタンプレポリマー NCO（ポリプロピレング
リコールの末端T.D.I.アダクト） ５％
Ｂ成分
キユアミンMT（イハラケミカル社製ウレタン用
アミン硬化剤） 15重量部
D.O.P. 60 〃
クロムオキサイドグリーン ８ 〃
シリカ超微粉末 ５ 〃
炭酸カルシウム 50 〃
トルエン 85 〃
−弾性粒体−
加硫ゴムチツプ（粒径約0.5〜1.0mm） 40重量部
実施例 ４
実施例３で形成した塗布材層２上に、実施例２
と同様にして塗料層４を形成して、塗布材層２と
塗料層４の二層による表面仕上げを行つた。この
透水性弾性舗装体の透水性、塗布材層２及び塗料
層４の厚さ、滑り抵抗性を第１表に示す。
比較例 １
塗布材層２を設けない他は実施例と全く同様に
して、ゴムチツプ層１上に直接塗料を吹き付けて
形成した透水性弾性舗装体の透水性、塗料層４の
厚さ、滑り抵抗性を第１表に示す。
[Industrial Field of Application] The present invention relates to a water-permeable elastic pavement that has both water permeability and appropriate elasticity and is used for, for example, competition tracks, tennis courts, etc. and improvement of appearance. [Prior Art] Conventionally, water-permeable elastic pavement has been produced by connecting vulcanized rubber chips on a water-permeable asphalt concrete layer with a binder of flexible synthetic resin such as polyurethane, leaving gaps between each chip. A rubber chip layer is provided, and a paint layer is provided by directly applying paint to the surface of this rubber chip layer. The paint layer is intended to improve the appearance with a matte finish and to provide weather resistance, abrasion resistance, anti-slip properties, etc. For example, urethane-based paints, acrylic-based paints, etc. are used. [Problems to be Solved by the Invention] However, in the conventional water-permeable elastic pavement body in which a paint layer is provided directly on the rubber chip layer, when viewed microscopically, each vulcanized rubber chip located on the surface of the rubber chip layer A paint layer is formed on top,
Since the paint layer is formed on a microscopic area, the bonding force of the paint layer to the rubber chip layer is weak. Furthermore, for the same reason, it is difficult to make the paint layer thick, which causes the following problems in terms of surface durability and appearance. First, the paint layer in frequently used areas is prone to wear and peeling, making it necessary to repaint the paint layer after a short period of use. Second, if the paint layer is used in a worn state, the strength of the surface of the rubber chip layer decreases, making it easier for the rubber chips to break off. Thirdly, the joints when the rubber chip layer is laid cannot be sufficiently covered with the paint layer, and the joints remain as clear lines, deteriorating the appearance. [Means for Solving the Problems] The measures taken to solve the above problems will be explained with reference to FIGS. 1 and 2, which schematically show the layer structure of the water-permeable elastic pavement according to the present invention. On the rubber chip layer 1, a thixotropic coating material is coated and cured to form a coating material layer 2 that fills the voids 3 in a part of the surface of the rubber chip layer 1.
(hereinafter referred to as the "first invention"), and a water-permeable elastic pavement body in which a paint layer 4 is further formed on the coating material layer 2. (hereinafter referred to as the "second invention"). The rubber chip layer 1 in the present invention is similar to the conventional one, and is made of vulcanized rubber chips, mainly with a diameter of about 1 to 4 mm, and is made of vulcanized rubber chips with a binder of flexible synthetic resin such as polyurethane. The chips are interconnected with gaps 3 left between them. The thixotropic coating material that is applied and cured to form the coating material layer 2 can be cured after being applied, can be made into a fluid sol-like state that can be applied when uncured, and can be left standing still. The curable thixotropic composition may be used alone, or it may contain particles or the like, as long as it forms a gel that does not easily flow from the rubber chip layer 1. The thixotropic composition used in the thixotropic coating material is preferably one containing polyurethane resin, elastic epoxy resin, acrylic resin, etc. as a main component, considering the adhesiveness with the rubber chip layer 1 and the paint layer 4 after curing. Examples of materials that impart thixotropy include silica powder,
Examples include oxidized polyethylene amorphous powder, clay, and hydrogenated castor oil. In addition to the above-mentioned components, the thixotropic composition may contain various additives necessary to improve the durability, appearance, etc. of the rubber chip layer 1, such as colorants and ultraviolet absorbers. The thixotropic coating material is preferably a mixture of the above-mentioned thixotropic composition with granules, particularly elastic granules.
When the elastic particles are mixed, elastic fine irregularities that are difficult to fall off are formed in the coating material layer 2, and in the first invention, the finished appearance of the surface and the anti-slip property when wet are improved. Moreover, since the surface of the paint layer 4 is also formed with unevenness along the above-mentioned unevenness, similar benefits can be obtained in the second invention. As the elastic particles, for example, foamed polyurethane particles, vulcanized rubber chips, etc. can be used. This elastic granule has a particle size of 0.2~2.0mm, optimally
It is preferable to add 5 to 10 parts by weight of foamed polyurethane particles and 10 to 15 parts by weight of vulcanized rubber chips to 100 parts by weight of the thixotropic composition. If the particle size is too small or the amount added is too small, the purpose of adding elastic particles will be diminished.On the other hand, if the particle size is too large or the amount added is too large, it may become difficult to apply by spraying, or the rubber chip layer 1 may become difficult to apply. Water permeability is easily inhibited. The coating material layer 2 is made by converting a thixotropic coating material into a sol,
It is formed by applying it to the surface of the rubber chip layer 1, for example, by spraying and curing it. This coating material layer 2 covers only some of the voids on the surface of the rubber chip layer 1 in order to maintain water permeability required for practical use.
It is preferable that about 10 to 30% of voids remain on the surface of the rubber chip layer 1 after attachment compared to before attachment. The coating amount of the thixotropic coating material is preferably about 1.0 to 1.5 kg/m 2 in both the first invention and the second invention. If the coating amount is too small, the durability and appearance of the surface of the rubber chip layer 1 will tend to be insufficiently improved, while if it is too large, the water permeability of the rubber chip layer 1 will tend to be inhibited. Further, during this application, an organic solvent may be added to the thixotropic coating material in order to facilitate the application. The organic solvent selected is one that does not react with the components in the thixotropic coating material or the elastic particles. The paint layer 4 in the second invention may be the same as the conventional one, for example, a urethane-based paint, an acrylic-based paint, etc., and a flexible one is preferably used. The coating amount may be selected within a range that does not impede water permeability, but 200 to 30 g/m 2 is appropriate. [Function] When the thixotropic coating material constituting the coating material layer 2 is applied to the surface of the rubber chip layer 1, relatively large voids 3 are left because it has thixotropy, but relatively small voids 3 are left behind due to the thixotropic coating. covered with wood. For this reason, the rubber chip layer 1 is partially sealed and a thick coating film is obtained, and a thick coating material layer 2 is formed, while the remaining voids 3 have the water permeability necessary for practical use. maintained by. Also, a part of the coating material layer 2 wedges into the covering gap 3, and the coating material layer 2 firmly adheres to the rubber chip layer 1. In the first invention, the coating material layer 2 serves as a finishing layer on the surface. As described above, this coating material layer 2 is thick and firmly adheres to the surface of the rubber chip layer 1, so that the coating material layer 2 is less likely to peel off or wear out, and the rubber chips are also prevented from falling off, thereby increasing the durability of the surface. will improve. Moreover, the spliced portion of the rubber chip layer 1 can be covered and the appearance can be improved. In the second invention, two layers, the coating material layer 2 and the paint layer 4 provided thereon, serve as the surface finishing layer. Since the paint layer 4 is provided on the rubber chip layer 1 partially sealed with the coating material layer 2, it can be made thick and difficult to peel off. Since it is easier to adjust the color, matte state, anti-slip properties, etc. of paint compared to thixotropic coating materials, by providing the paint layer 4, these can be adjusted more delicately. [Example] Example 1 A thixotropic coating material consisting of a thixotropic composition alone, which is a mixture of 100 parts by weight of the following component A and 235 parts by weight of component B, was applied onto the rubber chip layer 1 using a 1.3 kg/m 2 ricing gun. After spray coating, it is cured to form coating material layer 2,
Finished the surface. Table 1 shows the water permeability, the thickness of the coating material layer 2, and the slip resistance of this water permeable elastic pavement. -Thixotropic composition- A component urethane prepolymer NCO (terminal TDI adduct of polypropylene glycol) 5% B component Kyuamine MT (amine curing agent for urethane manufactured by Ihara Chemical Co., Ltd.) 15 parts by weight DOP 60 Chromium oxide green 8 Silica super Fine powder 7 〃 Calcium carbonate 60 〃 Toluene 85 〃 Example 2 On the coating material layer 2 formed in Example 1, 0.25% of the urethane paint which has flexibility and has a matte finish is applied.
A paint layer 4 was formed by spraying with a Kg/m 2 airless sprayer, and a two-layer surface finish of coating material layer 2 and paint layer 4 was performed. The water permeability of this water permeable elastic pavement body, the thickness of the coating material 2 and the paint layer 4,
The slip resistance is shown in Table 1. Example 3 A thixotropic composition was prepared by adding 100 parts by weight of the following component A and component B.
Surface finishing was carried out in the same manner as in Example 1, except that the coating material layer 3 was formed using a thixotropic coating material in which 223 parts by weight of the components were mixed and 40 parts by weight of the elastic particles described below were further mixed therein. Table 1 shows the water permeability, the thickness of the coating material layer 2, and the slip resistance of this water permeable elastic pavement. -Thixotropic composition- A component urethane prepolymer NCO (terminal TDI adduct of polypropylene glycol) 5% B component Kyuamine MT (amine curing agent for urethane manufactured by Ihara Chemical Co., Ltd.) 15 parts by weight DOP 60 Chromium oxide green 8 Silica super Fine powder 5 Calcium carbonate 50 Toluene 85 -Elastic particles- Vulcanized rubber chips (particle size approximately 0.5 to 1.0 mm) 40 parts by weight Example 4 Example 2 was applied on the coating material layer 2 formed in Example 3.
A paint layer 4 was formed in the same manner as described above, and the surface was finished with two layers, the coating material layer 2 and the paint layer 4. Table 1 shows the water permeability, the thickness of the coating material layer 2 and the paint layer 4, and the slip resistance of this water permeable elastic pavement. Comparative Example 1 Water permeability, thickness of paint layer 4, and slip resistance of a water permeable elastic pavement formed by spraying paint directly onto rubber chip layer 1 in exactly the same manner as in Example except that coating material layer 2 was not provided. The properties are shown in Table 1.
【表】
［発明の効果］
本発明によれば、塗膜厚の大きい耐久性のある
仕上げ層が得られ、この層は短期間に摩滅するこ
となく長期間使用出来、かつゴムチツプの欠落も
生じないので保守管理が極めて容易となる。ま
た、ゴムチツプ層１の打ち継ぎ部を容易に仕上げ
層で覆い隠せるので、打ち継ぎ位置を目立ちにく
い位置に調整する必要がなく、施工が極めて容易
となる。[Table] [Effects of the Invention] According to the present invention, a durable finishing layer with a large coating thickness can be obtained, and this layer can be used for a long period of time without being worn away in a short period of time. Since there is no such thing, maintenance management is extremely easy. In addition, since the splicing part of the rubber chip layer 1 can be easily covered with the finishing layer, there is no need to adjust the splicing position to a position that is less noticeable, making construction extremely easy.
第１図は第一発明に係る透水性弾性舗装体の層
構成の概略を示す図、第２図は第二発明に係る透
水性弾性舗装体の層構成の概略を示す図である。
１：ゴムチツプ、２：塗布材層、３：空隙、
４：塗料層。
FIG. 1 is a diagram schematically showing the layer structure of a water-permeable elastic pavement according to the first invention, and FIG. 2 is a diagram schematically showing the layer structure of the water-permeable elastic pavement according to the second invention. 1: rubber chip, 2: coating material layer, 3: void,
4: Paint layer.
Claims (1)
させた塗布材層が、ゴムチツプ層表面の一部の空
隙を覆つて形成されていることを特徴とする透水
性弾性舗装体。 ２ 揺変性塗布材が、揺変性組成物と弾性粒体の
混合物であることを特徴とする特許請求の範囲第
１項記載の透水性弾性舗装体。 ３ ムチツプ層上に、揺変性塗布材を塗布硬化さ
せた塗布材層が、ゴムチツプ層表面の一部の空隙
を覆つて形成されており、この塗布材層上に更に
塗料層が形成されていることを特徴とする透水性
弾性舗装体。 ４ 揺変性塗布材が、揺変性組成物と弾性粒体の
混合物であることを特徴とする特許請求の範囲第
３項記載の透水性弾性舗装体。[Scope of Claims] 1. A water-permeable elastic pavement characterized in that a coating material layer formed by coating and curing a thixotropic coating material on a rubber chip layer covers some of the voids on the surface of the rubber chip layer. body. 2. The water-permeable elastic pavement according to claim 1, wherein the thixotropic coating material is a mixture of a thixotropic composition and elastic particles. 3. A coating material layer made by coating and curing a thixotropic coating material is formed on the whip layer, covering some of the voids on the surface of the rubber chip layer, and a paint layer is further formed on this coating material layer. A water-permeable elastic pavement body characterized by: 4. The water-permeable elastic pavement according to claim 3, wherein the thixotropic coating material is a mixture of a thixotropic composition and elastic particles.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7658185 | 1985-04-12 | ||
| JP60-76581 | 1985-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6233903A JPS6233903A (en) | 1987-02-13 |
| JPH0353403B2 true JPH0353403B2 (en) | 1991-08-15 |
Family
ID=13609242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8009586A Granted JPS6233903A (en) | 1985-04-12 | 1986-04-09 | Water permeable elastic paving body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6233903A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2801592B2 (en) * | 1986-11-11 | 1998-09-21 | 三井化学株式会社 | High elasticity pavement method |
| JP2512560B2 (en) * | 1989-09-08 | 1996-07-03 | カネボウ・エヌエスシー株式会社 | How to finish an elastic pavement surface |
| JP2625343B2 (en) * | 1993-01-08 | 1997-07-02 | ヤブ原産業株式会社 | Fading resistance, water-permeable surface pavement material |
| JP5560957B2 (en) * | 2010-06-29 | 2014-07-30 | 横浜ゴム株式会社 | Method for producing elastic pavement and elastic pavement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5640205A (en) * | 1979-09-11 | 1981-04-16 | Nippon Electric Co | Producing film resistanceecircuit network |
| JPS5985005A (en) * | 1982-11-02 | 1984-05-16 | 四国化成工業株式会社 | Construction of pavement |
-
1986
- 1986-04-09 JP JP8009586A patent/JPS6233903A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6233903A (en) | 1987-02-13 |
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