JPH0219850B2 - - Google Patents
Info
- Publication number
- JPH0219850B2 JPH0219850B2 JP57092306A JP9230682A JPH0219850B2 JP H0219850 B2 JPH0219850 B2 JP H0219850B2 JP 57092306 A JP57092306 A JP 57092306A JP 9230682 A JP9230682 A JP 9230682A JP H0219850 B2 JPH0219850 B2 JP H0219850B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- parts
- bumper
- plasma
- bumper body
- 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
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 16
- 239000003973 paint Substances 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 10
- 229920001155 polypropylene Polymers 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- -1 polypropylene Polymers 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 229920003002 synthetic resin Polymers 0.000 claims description 4
- 239000000057 synthetic resin Substances 0.000 claims description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 10
- 239000000454 talc Substances 0.000 description 10
- 229910052623 talc Inorganic materials 0.000 description 10
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000009832 plasma treatment Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000010107 reaction injection moulding Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、所望の色調に表面を塗装する自動車
用樹脂バンパーの製造方法に関するものである。
従来、この種の自動車用バンパーとしては反応
射出成形によるポリウレタン樹脂製のものが知ら
れているが、材料費が高いところからコスト高な
ものになることを免れ得ない。
これに対し、ポリプロピレン樹脂に代表される
ポリオレフイン系樹脂は比重が他のものに比べて
小さくしかも重量当りの価格が安いため、自動車
用バンパーを製造するものとしてはコスト的にも
好ましい樹脂であるが、次の欠点を有する。
(1) 塗膜の密着性が極めて悪い。
(2) 耐衝撃性、可撓性に欠ける。
特に、ポリプロピレン樹脂は熱可塑性の合成
樹脂であるから低温に晒されると硬度が高くな
つて脆くなる傾向にあり、自動車用バンパーは
外部の障害物と接触することが多いもので低温
化でもある程度の耐衝撃性や可撓性を発揮でき
るものでなければならない。
(3) 自己保形性に欠ける。
自動車用バンパーは通常裏面側数ケ所でブラ
ケツト等を介して車体に取付けられるものであ
るから、取付部以外の部分で垂れ下がつたり或
いは容易に変形しないようある程度、自身でそ
の形状を保持できる剛性を有するものでなけれ
ばならない。
(4) 高温化で軟化変形し易い。
自動車用バンパーは高温地域での使用にも耐
えらえなければならないことは勿論、通常75〜
100℃で60分間程度表面の塗膜を焼付処理する
ところから高温環境下で軟化変形するものであ
つてはならない。
茲において、本発明は上述した欠点を改善し、
ムラのない十分な密着性を持つた塗膜を有し低コ
ストで製造可能な自動車用樹脂バンパーの製造方
法を提供することを目的とする。
即ち、本発明に係る自動車用樹脂バンパーの製
造方法においては、ポリプロピレンを30〜40重量
部、エチレンプロピレンラバーを30〜40重量部、
無機質粉末を20〜30重量部混合した合成樹脂でバ
ンパー本体を形成し、このバンパー本体の表面に
真空釜内の真空下で空気をマイクロ波放電でプラ
ズマ化したプラズマガスを真空釜内の複数の吹出
口から均等に吹付けてプラズマ処理を施し、その
後にウレタン系塗料をバンパー本体の表面に塗布
して加熱で塗膜を焼付処理するようにされてい
る。
以下、これを実施例に基づいて説明すれば、次
の通りである。
本発明者はポリプロピレン（PP）、エチレンプ
ロピレンラバー（EPR）、無機質粉末としてタル
クを表１の配合比率で混合することにより、その
各組成材料で自動車用のバンパー本体を成形して
試料１〜20を作成した。茲で、PPとしてはMFI
（230℃）、6.0ｇ／10分のものを用い、EPRとして
はエチレン含量72重量部、MFI（230℃）0.8ｇ／
10分のものを用い、タルクとして平均粒径2μ（林
化成社製）のものを用いることができる。なお、
無機質粉末としてはタルクに代えて炭酸カルシウ
ム、硫酸バリウム等他の無機質粉末を用いること
ができる。更に、タルクを主成分とし、それに増
量材となる炭酸カルシウム、表面光沢性を向上さ
せる硫酸バリウム等目的に合つた無機質粉末を適
宜添加することもできる。
TECHNICAL FIELD The present invention relates to a method for manufacturing a resin bumper for an automobile, in which the surface is painted in a desired color tone. Hitherto, this type of automobile bumper has been known to be made of polyurethane resin by reaction injection molding, but it is inevitable that the bumper will be expensive due to the high material cost. On the other hand, polyolefin resins such as polypropylene resins have a lower specific gravity than other resins and are cheaper per weight, so they are preferable from a cost perspective when manufacturing automobile bumpers. , has the following drawbacks. (1) The adhesion of the paint film is extremely poor. (2) It lacks impact resistance and flexibility. In particular, since polypropylene resin is a thermoplastic synthetic resin, it tends to increase in hardness and become brittle when exposed to low temperatures.Automobile bumpers often come into contact with external obstacles, so even at low temperatures, It must be able to exhibit impact resistance and flexibility. (3) Lacks self-retention. Automobile bumpers are usually attached to the vehicle body at several locations on the back side via brackets, etc., so they can maintain their shape to a certain extent so that they do not sag or easily deform at parts other than the attachment points. It must be rigid. (4) Easily softened and deformed at high temperatures. Automobile bumpers must of course be able to withstand use in high-temperature areas, and they usually have a temperature of 75~
Since the surface coating is baked at 100℃ for about 60 minutes, it must not soften or deform in a high-temperature environment. In this respect, the present invention improves the above-mentioned drawbacks,
An object of the present invention is to provide a method for manufacturing a resin bumper for an automobile that has a coating film with sufficient adhesion without unevenness and can be manufactured at low cost. That is, in the method for manufacturing a resin bumper for an automobile according to the present invention, 30 to 40 parts by weight of polypropylene, 30 to 40 parts by weight of ethylene propylene rubber,
The bumper body is formed from a synthetic resin mixed with 20 to 30 parts by weight of inorganic powder, and the surface of the bumper body is covered with plasma gas, which is made by converting air into plasma by microwave discharge under vacuum in a vacuum pot. The plasma treatment is performed by spraying the bumper evenly from the air outlet, and then the urethane paint is applied to the surface of the bumper body and the paint film is baked by heating. This will be explained below based on an example. The present inventor mixed polypropylene (PP), ethylene propylene rubber (EPR), and talc as an inorganic powder in the proportions shown in Table 1, and formed automobile bumper bodies using the respective composition materials. It was created. In the case, MFI as PP
(230℃), 6.0g/10 minutes, the EPR is ethylene content 72 parts by weight, MFI (230℃) 0.8g/10 minutes.
A talc with an average particle size of 2 μm (manufactured by Hayashi Kasei Co., Ltd.) can be used. In addition,
As the inorganic powder, other inorganic powders such as calcium carbonate and barium sulfate can be used instead of talc. Furthermore, the main component is talc, and inorganic powder suitable for the purpose, such as calcium carbonate as a filler and barium sulfate to improve surface gloss, can be added as appropriate.
【表】
これら試料のうち、EPRを30〜40重量部加え
た試料４、５、17〜20はバンパーとして好適なあ
る程度のゴム弾性を持ち、それ以下の試料１〜
３、９〜16は硬度が高くて脆いものであつた。ま
た、20重量部以上多量に加えた試料６〜８はゴム
弾性が大きくて自己保形性が低下し、曲げ弾性率
が3000Kg/cm3以下となつてしまつた。また、この
EPRのみであるとガス状性能が高くなつて自己
保形性が低下し易いから、試料10、11、16〜19の
ようにEPRと共にタルクを20〜30重量部加える
と剛性が高まつて自己保形性が向上すると共に耐
熱性も向上し、また、タルクが価格的に安価なも
のであるからバンパーの材料費を低く抑えること
もできる。唯、タルクが30％以上を越える試料
12、13、14、20は可撓性が低く耐衝撃性に欠ける
ところからEPRを比較的多量に混入することに
より耐衝撃性の低下を補うとよい。なお、試料
13、14、20はアイゾツト衝撃値２Kg・cm/cm（23
℃）以下となつてしまうため、自動車用のバンパ
ーとしては適さない。
次に、各試料に対して、添付図面で示す如きプ
ラズマ発生装置を用いてプラズマ処理を施した。
このプラズマ発生装置はバンパー本体Ａを収容
する真空釜１を持ち、その釜内をポンプ２で減圧
して真空下でプラズマガスを吹付けることにより
バンパー本体Ａの表面改質を行うことができる。
この真空釜１には内部圧が所定の真空値に達した
後にマイクロ波放電でプラズマ化する気体を導入
するが、その気体しては大気中の空気３が好まし
い。これに代えて、別に備えるガスボンベから供
給する酸素、窒素、アルゴン、ヘリウム等のガス
を用いることができるが、これではガス材料費、
設備費が掛りしかも取扱いや安全上の注意や管理
も必要になる。それに対し、大気中の空気であれ
ばコストも掛らず、また、常時略一定の大気圧を
もつて空気を供給できるから取扱い上の注意や管
理も不必要であつて特に好ましい。また、マイク
ロ波放電によるプラズマ処理では処理室の圧力を
0.2〜1.5Torrと広い圧力範囲で処理することがで
るから工場現場における圧力管理が非常に簡単で
かつムラのない安定した表面改質ができ、しかも
高密度のプラズマを生成できるので十分な表面改
質を行うことができる。この大気中の空気を真空
釜１に導入するときにはリークバルブ４を開いて
導入量を流量計５でチエツクし、微少量ずつ供給
するよう調節することができる。その真空釜１の
圧力を一定に保つてマイクロ波発振器６を発振さ
せると、導入された空気がプラズマ発生部７でプ
ラズマ化されることによりプラズマガスとして真
空釜１内の分配管８に送られて吹出口９ａ，９ｂ
…９ｇからバンパー本体Ａの表面に向けて吹付け
られる。このとき、吹出口９ａ，９ｂ…９ｇはバ
ンパー本体Ａの全長に対応させて設けられていれ
ばバンパー本体Ａの略全面に均等に吹付け得るか
ら、プラズマ処理に部分的なバラ付きが生じない
ところから好ましい。
この装置内に、1600（長さ）×500（奥行き）×200
（幅）mmの外形寸法で肉厚を約4.5mm均一の断面略
Ｕ字状に成形したバンパー本体Ａを各試料として
収容し、次の条件でプラズマ処理した。
真空圧力：0.5Torr
マイクロ波発生出力：7KW
使用気体：空気
気体流量：5000c.c./min
処理時間：60sec
そのプラズマ処理を所定時間行つた後、マイク
ロ波発振器６と真空ポンプ２を停止させ、真空釜
１の圧力を大気圧に戻して試料を取出し、各試料
の表面にはウレタン系塗料（Ｒ−263、日本ビー
ケミカル社製）で全面塗装を施して80℃×1hrの
塗料焼付処理を行つた。次に、各試料の表面には
1.5mm幅で縦、横11本づつのカツトをナイフで入
れ、その塗膜面にニチバンセロテープ24mm幅を貼
着すると共に塗膜面に対して略90゜の角度で引上
げることにより塗膜剥離の有無を調べて密着度テ
ストを行つた結果、表２で示す通りであつた。
なお、この表２のなかで「自動車部品としての
適性」は、曲げ弾性率3000〜21000Kg/cm3
（ASTM D790−63）、耐熱温度80℃以上
（ASTM D643）、耐寒衝撃性1.5Kgcm/cm以上
（ASTM D256）のいずれも同時に満足するもの
を〇印で、いずれか１つでも満足しないものを×
印で表わすものであり、自動車に取付けた場合に
バンパーとしての機能を著しく損なわないかの評
価である。[Table] Among these samples, Samples 4, 5, 17 to 20 with 30 to 40 parts by weight of EPR have a certain degree of rubber elasticity suitable for bumpers, and Samples 1 to 20 with 30 to 40 parts by weight of EPR have a certain degree of rubber elasticity suitable for bumpers.
Nos. 3 and 9 to 16 had high hardness and were brittle. Further, samples 6 to 8 in which a large amount of 20 parts by weight or more was added had high rubber elasticity and a decrease in self-shape retention, resulting in a flexural modulus of 3000 Kg/cm 3 or less. Also, this
If only EPR is used, the gaseous properties tend to increase and self-retention properties tend to decrease, so adding 20 to 30 parts by weight of talc together with EPR, as in Samples 10, 11, 16-19, increases rigidity and self-retaining properties. Shape retention is improved and heat resistance is also improved, and since talc is inexpensive, material costs for the bumper can be kept low. Only samples with talc exceeding 30%
Since materials Nos. 12, 13, 14, and 20 have low flexibility and lack impact resistance, it is advisable to mix a relatively large amount of EPR to compensate for the decrease in impact resistance. In addition, the sample
13, 14, 20 have Izotsu impact value 2Kg・cm/cm (23
℃) or less, making it unsuitable for use as a bumper for automobiles. Next, each sample was subjected to plasma treatment using a plasma generator as shown in the attached drawings. This plasma generator has a vacuum pot 1 that houses a bumper body A, and can modify the surface of the bumper body A by reducing the pressure in the pot with a pump 2 and spraying plasma gas under vacuum.
After the internal pressure reaches a predetermined vacuum value, a gas that is turned into plasma by microwave discharge is introduced into the vacuum pot 1, and the gas is preferably air 3 in the atmosphere. Alternatively, gases such as oxygen, nitrogen, argon, helium, etc. supplied from a separate gas cylinder can be used, but this would reduce the cost of gas materials and
Equipment costs are high, and additional handling, safety precautions, and management are required. On the other hand, air in the atmosphere is particularly preferable because it does not require any cost, and since air can be supplied at a substantially constant atmospheric pressure at all times, there is no need for care or management in handling. In addition, plasma processing using microwave discharge reduces the pressure in the processing chamber.
Since the treatment can be carried out in a wide pressure range of 0.2 to 1.5 Torr, pressure control at the factory site is very easy, and even and stable surface modification can be achieved.Furthermore, high-density plasma can be generated, so sufficient surface modification can be achieved. Can do quality. When this atmospheric air is introduced into the vacuum pot 1, the leak valve 4 is opened and the amount introduced is checked with a flow meter 5, so that the air can be adjusted to be supplied little by little. When the pressure in the vacuum pot 1 is kept constant and the microwave oscillator 6 is oscillated, the introduced air is turned into plasma in the plasma generating section 7 and sent as plasma gas to the distribution pipe 8 in the vacuum pot 1. Air outlet 9a, 9b
...9g is sprayed toward the surface of the bumper body A. At this time, if the air outlets 9a, 9b...9g are provided corresponding to the entire length of the bumper body A, the air can be sprayed evenly over almost the entire surface of the bumper body A, so that no local variations occur in the plasma treatment. It is preferable from that point of view. Inside this device, 1600 (length) x 500 (depth) x 200
A bumper body A formed into a substantially U-shaped cross section with an external dimension of (width) mm and a uniform wall thickness of approximately 4.5 mm was housed as each sample, and plasma treated under the following conditions. Vacuum pressure: 0.5Torr Microwave generation output: 7KW Gas used: Air Gas flow rate: 5000c.c./min Processing time: 60sec After performing the plasma treatment for a predetermined time, the microwave oscillator 6 and vacuum pump 2 are stopped. The pressure in vacuum pot 1 was returned to atmospheric pressure and the samples were taken out. The surface of each sample was fully coated with urethane paint (R-263, manufactured by Nippon B Chemical Co., Ltd.), and the paint was baked at 80°C for 1 hour. I went. Next, the surface of each sample is
Peel the paint film by making 1.5 mm wide cuts with a knife, 11 vertically and 11 horizontally, and attach 24 mm wide Nichiban Sellotape to the paint surface, and pull it up at an angle of about 90 degrees to the paint surface. The results of an adhesion test were as shown in Table 2. In Table 2, "suitability as an automobile part" means a bending modulus of elasticity of 3000 to 21000 Kg/cm 3
(ASTM D790-63), heat resistance temperature of 80℃ or higher (ASTM D643), and cold impact resistance of 1.5Kgcm/cm or higher (ASTM D256). ×
It is expressed by a mark, and is an evaluation to see if the bumper function will be significantly impaired when installed on a car.
【表】
この試験の結果で、試料17のポリプロピレン40
重量部、エチレンプロピレンラバー30重量部、タ
ルク等の無機質粉末30重量部、試料18のポリプロ
ピレン40重量部、エチレンプロピレンラバー40重
量部、タルク等の無機質粉末20重量部、試料19の
ポリプロピレン30重量部、エチレンプロピレンラ
バー40重量部、タルク等の無機質粉末30重量部混
合した合成樹脂によるバンパーが塗装密着性、自
動車部品としての適性を備えるものであることが
明らかになつた。
なお、実施例においてはバンパーにゴム状弾性
を与え低温時の耐衝撃性を高める目的でエチレン
プロピレンラバーを用いたが同様の特性を与える
にはエチレンプロピレンラバーに代えてエチレン
プロピレンジエンラバーを均等物として用いるこ
ともできる。そのエチレンプロピレンジエンラバ
ーを用いた場合にはエチレンプロピレンラバーを
用いる場合よりもコスト高に高いものであるが、
線膨張を抑えることができるという効果がある。
以上の如く、本発明に係る自動車用樹脂バンパ
ーの製造方法に依れば、特定組成の材料を使用し
て自動車用バンパーとして要求される特性を持つ
バンパー本体を低コストで形成できるばかりでな
く、塗料の密着性が良好でムラのない塗膜を有す
るバンパーを低コストで製造することを可能にす
るものである。[Table] In the results of this test, polypropylene 40 of sample 17
parts by weight, 30 parts by weight of ethylene propylene rubber, 30 parts by weight of inorganic powder such as talc, 40 parts by weight of polypropylene of sample 18, 40 parts by weight of ethylene propylene rubber, 20 parts by weight of inorganic powder such as talc, 30 parts by weight of polypropylene of sample 19 It has been revealed that a bumper made of a synthetic resin mixed with 40 parts by weight of ethylene propylene rubber and 30 parts by weight of inorganic powder such as talc has good paint adhesion and is suitable as an automobile part. In the example, ethylene propylene rubber was used to give the bumper rubber-like elasticity and improve impact resistance at low temperatures, but to provide the same characteristics, an equivalent material, ethylene propylene diene rubber, could be used instead of ethylene propylene rubber. It can also be used as When using ethylene propylene diene rubber, the cost is higher than when using ethylene propylene rubber, but
This has the effect of suppressing linear expansion. As described above, according to the method of manufacturing a resin bumper for an automobile according to the present invention, it is possible not only to form a bumper body having the characteristics required for an automobile bumper at low cost using a material with a specific composition, but also to This makes it possible to manufacture a bumper with good paint adhesion and an even coating film at low cost.
図面は、バンパー本体の表面に前処理を施すプ
ラズマ発生装置の模式的説明図である。
Ａ：バンパー本体、１：真空釜、２：真空ポン
プ、３：導入空気、６：マイクロ波発振器、７：
プラズマ発生部、８…分配管、９ａ，９ｂ…９
ｇ：吹出口。
The drawing is a schematic explanatory diagram of a plasma generator that performs pretreatment on the surface of a bumper body. A: Bumper body, 1: Vacuum pot, 2: Vacuum pump, 3: Introduced air, 6: Microwave oscillator, 7:
Plasma generation part, 8...Distribution pipe, 9a, 9b...9
g: Air outlet.
Claims (1)
ロピレンラバーを30〜40重量部、無機質粉末を20
〜30重量部混合した合成樹脂でバンパー本体を形
成し、このバンパー本体の表面に真空釜内の真空
下で空気をマイクロ波放電でプラズマ化したプラ
ズマガスを真空釜内の複数の吹出口から均等に吹
付けてプラズマ処理を施し、その後にウレタン系
塗料をバンパー本体の表面に塗布して加熱で塗膜
を焼付処理することにしたことを特徴とする自動
車用樹脂バンパーの製造方法。1 30 to 40 parts by weight of polypropylene, 30 to 40 parts by weight of ethylene propylene rubber, 20 parts by weight of inorganic powder
The bumper body is formed from a synthetic resin mixed with ~30 parts by weight, and plasma gas, which is made by turning air into plasma under vacuum in a vacuum pot using microwave discharge, is evenly applied to the surface of the bumper body from multiple outlets in the vacuum pot. A method for manufacturing a resin bumper for an automobile, characterized in that a urethane-based paint is applied to the surface of the bumper body and the paint film is baked by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57092306A JPS58208338A (en) | 1982-05-31 | 1982-05-31 | Composition material for resin molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57092306A JPS58208338A (en) | 1982-05-31 | 1982-05-31 | Composition material for resin molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58208338A JPS58208338A (en) | 1983-12-05 |
| JPH0219850B2 true JPH0219850B2 (en) | 1990-05-07 |
Family
ID=14050718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57092306A Granted JPS58208338A (en) | 1982-05-31 | 1982-05-31 | Composition material for resin molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58208338A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04116644U (en) * | 1991-03-28 | 1992-10-19 | 愛知機械工業株式会社 | fuel injection control system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01301433A (en) * | 1988-05-26 | 1989-12-05 | Daikyo Inc | Surface skin member of plastics bumper |
| KR970042763A (en) * | 1995-12-30 | 1997-07-26 | 김준웅 | Polypropylene resin composition with improved coating |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682827A (en) * | 1979-12-11 | 1981-07-06 | Mitsubishi Petrochem Co Ltd | Surface treatment of propylene composite resin molded article |
| JPS5734950A (en) * | 1980-08-11 | 1982-02-25 | Dainippon Ink & Chemicals | Vessel in polyolefin |
-
1982
- 1982-05-31 JP JP57092306A patent/JPS58208338A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682827A (en) * | 1979-12-11 | 1981-07-06 | Mitsubishi Petrochem Co Ltd | Surface treatment of propylene composite resin molded article |
| JPS5734950A (en) * | 1980-08-11 | 1982-02-25 | Dainippon Ink & Chemicals | Vessel in polyolefin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04116644U (en) * | 1991-03-28 | 1992-10-19 | 愛知機械工業株式会社 | fuel injection control system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58208338A (en) | 1983-12-05 |
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