JPS6117261B2 - - Google Patents
Info
- Publication number
- JPS6117261B2 JPS6117261B2 JP52094755A JP9475577A JPS6117261B2 JP S6117261 B2 JPS6117261 B2 JP S6117261B2 JP 52094755 A JP52094755 A JP 52094755A JP 9475577 A JP9475577 A JP 9475577A JP S6117261 B2 JPS6117261 B2 JP S6117261B2
- Authority
- JP
- Japan
- Prior art keywords
- hot melt
- adhesive
- nylon
- sheet
- molded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 42
- 239000012943 hotmelt Substances 0.000 claims description 28
- 239000000853 adhesive Substances 0.000 claims description 17
- 230000001070 adhesive effect Effects 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000002657 fibrous material Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 claims description 2
- 238000002074 melt spinning Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 description 12
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 239000012790 adhesive layer Substances 0.000 description 6
- 239000004831 Hot glue Substances 0.000 description 5
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 5
- 229920000299 Nylon 12 Polymers 0.000 description 5
- 229920002292 Nylon 6 Polymers 0.000 description 5
- 229920002302 Nylon 6,6 Polymers 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 229920000571 Nylon 11 Polymers 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000011496 polyurethane foam Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Description
本発明は特殊な接着剤を使用しての成型天井の
作製方法に関するものである。
従来は自動車の天井には成型基材としてはフエ
ノール系樹脂を含浸した有機繊維あるいは無機繊
維のマツト、あるいは特殊ダンボールを基材とし
て、これを予め成型基材としてその表面に織布あ
るいは化粧ポリ塩化ビニールシートを表打ちした
ポリウレタン、ポリエチレン、ポリ塩化ビニルの
発泡体のシートを接着剤にて接合作製したものを
成型天井と称して自動車内に装着しているのであ
る。
最近、環境保全対策の推進に伴い自動車の排気
ガス規制が強まり、その対策として排ガスの触媒
による処理方式あるいはエンジンのデイゼル化な
どで排気ガス規制対策が進められている。
一方、これらの排ガス対策を実施することによ
り自動車車内の騒音が高くなり、更にその対策が
必要になつてくる。
成型天井の場合、本来吸音効果を考慮して設計
してはいるが、さらに吸音効果を高めるため成型
基材、表面にはる表面材ともにさらに吸音性の良
い機材が採用されてきている。この場合、成型基
材、表面材ともに通気性あるいは空隙率の大きな
素材が軽量化とコストダウンに合致するために多
く採用されてきている。このような状態で使用す
る接着剤の影響が接着力、吸音効果に更に大きな
効果をもたらすのである。
現在これらの接着剤には溶剤型とホツトメルト
型が使用されているが、しかしながら溶剤規制等
により後者のホツトメルト型が生産性の点からも
優れていて多く用いられている。しかもこれはホ
ツトメルトフイルム（第１図ロ，２参照）の形で
使用されている。
次にホツトメルトフイルムによる接着方法を詳
しく説明すると、フエノール樹脂含浸有機繊維マ
ツト、フエノール樹脂含浸硝子繊維マツトあるい
は特殊なダンボールを成型機で成型して成型天井
基材とする（第２図３に示す）。天井基材は凹型
の形状をしている。また厚さ３m/m〜５m/mの
発泡体のシートの表面（第２図４参照）に表面化
粧剤として伸縮可能な織物あるいは化粧塩化ビニ
ルシート（第２図５参照）を接合したものを表面
材とする。
ここに使用する発泡体シートはほとんどポリウ
レタンフオームである。基材と表面材の接着はホ
ツトメルトフイルムをサンドイツチ状にはさみこ
むかあるいは表面材の接着面に仮接着をした状態
でホツトプレスまたはホツトアンドコールドプレ
ス方式で接着を行う。この場合素材のコスト面か
らできるだけ低温プレスを生産性からみてできる
だけ短時間プレスを行うのが好ましい。その際、
とくに重要な点は接着の際、表面材は10〜20％の
伸長をうけプレス完了時は残留歪を有する。
前述のように吸音効果向上対策を素材面で採用
する場合、従来のホツトメルトフイルム型接着剤
は素材面で吸音効果を大巾に減少させる欠点をも
つている。
すなわち、ホツトメルトフイルム層の接着後に
層状に残留するために素材の通気性あるいは空隙
率の増加効果を阻害することによるのである。従
つて接着層にも通気性あるいは空隙性をもたらす
接着方法が必要である。
一方、このために接着力とくに前述の残留歪に
よる反撥力に対抗するために生産性が低下をもた
らすプレス時間を長くすることも不適である。さ
らに素材は物性的に熱伝導率の低下、熱容量の低
下を伴うのでホツトメルトフイルムで接着する場
合もプレス温度の上昇、プレス時間の延長が要求
されており、これを防止するためにより熱感受性
の高い形態的な改良が要求されてきている。
本発明者らはこれらの要因に対応するために
種々研究した結果、本発明に到達したのである。
すなわち、ホツトメルトフイルムの原料で３〜
50dの繊維物質を目付10〜100ｇ/m2のウエツブ状
のホツトメルトシート（第１図イ，１参照）を形
成し、このシートを接着剤として接着後接着剤層
の空隙率を20〜80％にした場合、従来のホツトメ
ルトフイルムを用いる場合に比較して極めて優れ
た性能を有することを見出した。
天井基材と表面剤の吸音性能を低下させること
なく、かつホツトメルトフイルムを用いる場合に
比較して接着温度および接着時間が著しく短縮で
き生産性が優れているのである。
本発明の要旨はホツトメルト接着剤の素材で３
〜50dの繊維状物（第１図イ，１′参照）を作成
し、その繊維状物で目付け10〜100ｇ/m2のウエツ
ブ状のホツトメルトシートを作り自動車成型天井
の基材と表面材の接着に使用するときに接着後の
接着剤層の空隙率を20〜80％になるように調整し
たとき、吸音素材の吸音性を低下させることのな
い成型天井を作成し得るものである。しかしなが
ら、繊維状物の製造法およびウエツブ状シートの
製造方法についての制限はない。接着剤層の接着
後の空隙率20〜80％は20％以下では吸音効果の低
下をもたらし80％以上では接着性が不十分であ
る。
また、繊維状物の単繊維繊度を50dを限度にし
たのは50dをこえると接着時間、温度に対する効
果が消失するからである。ホツトメルト用熱可塑
性高分子物質はポリオレフイン系、ポリアミド
系、ポリエステル系、ポリウレタン系等のものを
使用しこれに制限はないが、自動車用成型天井の
場合80℃以上72時間の耐熱テストに合格しなけれ
ばならない。
以上の性能を有しかつできるだけ低温で接着可
能なホツトメルト素材の例を挙げるとナイロンお
よびポリエステル樹脂が一般的である。たとえば
ナイロン６、ナイロン66およびナイロン11あるい
はナイロン12の共重合体で融点105〜120℃の樹脂
を選択すれば90℃、72時間以上の耐熱性能を有す
るホツトメルト素材を得ることができる。
さらにナイロン樹脂をブレンドして溶融粘度の
温度依存性を高めておけばさらに効果的である。
たとえばナイロン11共重合体樹脂のうち融点90〜
100℃、融点110〜120℃のポリマーブレンド（ペ
レツト）を作り、このペレツトよりＴダイを用い
てホツトメルトフイルムを作るとともに多孔ノズ
ルより繊維状に紡糸すると共に一定の巾のシート
状に配列し、かつ繊維間を自己接着を行つた繊維
シートを作成する。両者の目付けを同じようにし
て天井基材と表面材の接着を行つたときフイルム
状ホツトメルトより網状ホツトメルトの方が同じ
接着時間では低温で接着可能である。
たとえばフイルムの場合120℃の温度が接着に
必要下限温度であるのに比較してシートの場合は
110℃で接着可能であつた。この接着可能温度が
低下する理由はフイルムに比較してシートの場合
表面積が大きく増大しているために熱効果が良好
になつたためである。
以下、実施例を挙げて説明する。
原料ホツトメルト素材はナイロン６、ナイロン
66、ナイロン12の共重合体であつて、同共重合体
（プラタミド005、プラ−テボン社商品名、融点
115〜120℃、共重合率ナイロン６、ナイロン66、
ナイロン12、45：15：40％）、同共重合体（プラ
タミド105、プラ−テボン社、商品名、融点120〜
125℃、共重合率ナイロン６、ナイロン66、ナイ
ロン12、20：50：30％）、同共重合体（プラタミ
ドＭ−1059、プラ−テボン社試作品商品名、融点
95〜100℃、共重合率ナイロン６、ナイロン66、
ナイロン12、40：15：45％）を30：60：10部配向
した。このブレンドの見掛けの融点は105〜120℃
であつた。
従来のホツトメルト接着剤は以上のブレンド樹
脂を90m/mの押出機にてＴダイに目付30ｇ/m2と
50ｇ/m2のホツトメルトフイルムと作成と対照例
２、１とした。
一方、本発明の繊維状ホツトメルトシートは前
記ブレンド樹脂を溶融紡糸し、空気流を用いて延
伸して３〜30d（デニール）の繊維状にしたのち
130cm巾のシート状に配列し繊維間に自己接着を
行つて以下に示す３種類の繊維状物のホツトメル
トシートを作成した。繊維状ホツトメルトシート
の構成は
単繊維繊度 ３〜5d 目付量20ｇ/m2（実施例
３）
単繊維繊度 ３〜5d 目付量40ｇ/m2（実施例
１）
単繊維繊度 20〜30d 目付量40ｇ/m2（実施例
２）
である。
以上のホツトメルト接着剤はいずれも予め表面
材（ポリ塩化ビニル化粧シートつきポリウレタン
フオーム、３m/m）の裏側に仮接着した。
成型基材はフエノール樹脂含浸繊維ボード（レ
ジンボード）である。接着はホツトアンドコール
ド方式で行つた。すなわち、レジンボードをオー
ブン中で所定温度になるように加熱し、ついでコ
ールドプレス機に投入し、予め60℃付近に予熱し
たホツトメルト接着剤を仮接着した表面材を重ね
てプレスした。圧力は0.3KG/cm2に一定とした。
接着は接着性能が十分に得られる下限温度、下限
時間で実施した。結果を下表に示す。
The present invention relates to a method of making molded ceilings using special adhesives. Conventionally, the molding base material for automobile ceilings is organic or inorganic fiber matte impregnated with phenolic resin, or special cardboard, and this is pre-molded as a base material and the surface is covered with woven fabric or decorative polychloride. Molded ceilings are made by bonding polyurethane, polyethylene, and polyvinyl chloride foam sheets with vinyl sheets on the surface using adhesives, and are installed inside automobiles. Recently, with the promotion of environmental conservation measures, automobile exhaust gas regulations have become stricter, and as a countermeasure, exhaust gas control measures are being promoted, such as using exhaust gas treatment methods using catalysts or converting engines to diesel engines. On the other hand, implementing these exhaust gas countermeasures will increase the noise inside the automobile, and further countermeasures will become necessary. In the case of molded ceilings, they are originally designed with sound absorption in mind, but in order to further increase the sound absorption effect, materials with even better sound absorption properties are being used for both the molded base material and the surface material. In this case, materials with high air permeability or high porosity are often used for both the molding base material and the surface material because they are compatible with weight reduction and cost reduction. The influence of the adhesive used in such conditions has an even greater effect on the adhesive force and sound absorption effect. Currently, solvent-type and hot-melt adhesives are used for these adhesives, but due to solvent regulations, however, the latter hot-melt type is more commonly used as it is superior in terms of productivity. Moreover, it is used in the form of a hot melt film (see FIG. 1, b and 2). Next, to explain in detail the bonding method using hot melt film, phenolic resin-impregnated organic fiber mat, phenol resin-impregnated glass fiber mat, or special cardboard is molded with a molding machine to form a molded ceiling base material (as shown in Figure 2). ). The ceiling base material has a concave shape. In addition, the surface of a foam sheet with a thickness of 3 m/m to 5 m/m (see Fig. 2, 4) is bonded with a stretchable fabric or decorative vinyl chloride sheet (see Fig. 2, 5) as a surface cosmetic agent. Use as surface material. Most of the foam sheets used here are polyurethane foam. The base material and the surface material are bonded by sandwiching a hot melt film in the form of a sandwich or by temporarily adhering to the adhesive surface of the surface material using a hot press or hot and cold press method. In this case, from the viewpoint of material cost, it is preferable to press at a low temperature as much as possible, and from the viewpoint of productivity, to perform pressing for as short a time as possible. that time,
A particularly important point is that the surface material undergoes 10 to 20% elongation during adhesion and has residual strain upon completion of pressing. As mentioned above, when taking measures to improve the sound absorption effect on the material side, the conventional hot melt film type adhesive has the disadvantage that the sound absorption effect on the material side is greatly reduced. That is, the hot melt film layer remains in the form of a layer after adhesion, which inhibits the effect of increasing the air permeability or porosity of the material. Therefore, there is a need for an adhesive method that provides air permeability or porosity to the adhesive layer. On the other hand, it is also inappropriate to lengthen the pressing time, which reduces productivity in order to counteract the adhesive force, especially the repulsive force due to the aforementioned residual strain. Furthermore, the physical properties of the material include a decrease in thermal conductivity and a decrease in heat capacity, so even when bonding with hot melt film, it is necessary to increase the press temperature and extend the press time. Significant morphological improvements are required. The present inventors conducted various studies to address these factors, and as a result, they arrived at the present invention. In other words, the raw material for hot melt film is 3~
A web-like hot melt sheet (see Figure 1, A, 1) with a basis weight of 10 to 100 g/ m2 is formed from 50 d of fibrous material, and this sheet is used as an adhesive to increase the porosity of the adhesive layer to 20 to 80. %, it has been found that it has extremely superior performance compared to the case of using a conventional hot melt film. It does not reduce the sound absorption performance of the ceiling base material and surface material, and the bonding temperature and bonding time are significantly reduced compared to when hot melt film is used, resulting in excellent productivity. The gist of the present invention is to provide three hot melt adhesive materials.
~50d of fibrous material (see Figure 1 A and 1') is made, and the fibrous material is used to make a web-like hot melt sheet with a basis weight of 10 to 100 g/ m2 and used as a base material and surface material for automobile molded ceilings. When used for adhesion, when the porosity of the adhesive layer after adhesion is adjusted to 20 to 80%, it is possible to create a molded ceiling without reducing the sound absorption properties of the sound absorption material. However, there are no restrictions on the method of manufacturing the fibrous material or the web-like sheet. If the porosity of the adhesive layer after adhesion is 20 to 80%, if it is less than 20%, the sound absorption effect will decrease, and if it is more than 80%, the adhesiveness will be insufficient. Furthermore, the reason why the single fiber fineness of the fibrous material is limited to 50 d is because if it exceeds 50 d, the effect on bonding time and temperature disappears. Thermoplastic polymer materials for hot melt use include polyolefins, polyamides, polyesters, polyurethanes, etc., and there are no restrictions, but in the case of molded ceilings for automobiles, they must pass a heat resistance test of 80°C or higher for 72 hours. Must be. Nylon and polyester resins are common examples of hot melt materials that have the above performance and can be bonded at as low a temperature as possible. For example, by selecting a copolymer of nylon 6, nylon 66, and nylon 11 or nylon 12 with a melting point of 105 to 120°C, a hot melt material having heat resistance of 90°C for 72 hours or more can be obtained. It would be even more effective if nylon resin was blended to increase the temperature dependence of the melt viscosity.
For example, the melting point of nylon 11 copolymer resin is 90~
A polymer blend (pellet) with a temperature of 100°C and a melting point of 110 to 120°C is made, a hot melt film is made from the pellet using a T-die, and the film is spun into fibers through a perforated nozzle and arranged into a sheet of a certain width. In addition, a fiber sheet with self-adhesion between the fibers is created. When adhering a ceiling base material and a surface material with the same basis weight, the reticulated hot melt can be bonded at a lower temperature for the same bonding time than the film hot melt. For example, in the case of film, the minimum temperature required for adhesion is 120℃, but in the case of sheet,
Adhesion was possible at 110°C. The reason why the adhesion temperature is lower is that the sheet has a much larger surface area than the film, which improves the thermal effect. Examples will be described below. Raw material hot melt material is nylon 6, nylon
66, a copolymer of nylon 12 (Platamide 005, Pratebon product name, melting point
115-120℃, copolymerization rate nylon 6, nylon 66,
Nylon 12, 45:15:40%), copolymer (Platamide 105, Pratebon, trade name, melting point 120~
125℃, copolymerization rate nylon 6, nylon 66, nylon 12, 20:50:30%), same copolymer (Platamide M-1059, Prototype product name from Platebon Co., Ltd., melting point
95-100℃, copolymerization rate nylon 6, nylon 66,
Nylon 12, 40:15:45%) was oriented in a ratio of 30:60:10. The apparent melting point of this blend is 105-120℃
It was hot. Conventional hot melt adhesives are made by applying the blended resin above to a T-die with a fabric weight of 30 g/m 2 in a 90 m/m extruder.
Comparative Examples 2 and 1 were prepared using a hot melt film of 50 g/m 2 . On the other hand, the fibrous hot melt sheet of the present invention is produced by melt-spinning the blended resin and stretching it using an air stream to form a 3-30 d (denier) fiber.
The three types of fibrous hot melt sheets shown below were prepared by arranging them into a 130 cm wide sheet and self-adhering between the fibers. The composition of the fibrous hot melt sheet is as follows: Single fiber fineness: 3 to 5 d, basis weight: 20 g/m 2 (Example 3) Single fiber fineness: 3 to 5 d, basis weight: 40 g/m 2 (Example 1) Single fiber fineness: 20 to 30 d, basis weight 40g/m 2 (Example 2). All of the above hot melt adhesives were temporarily bonded in advance to the back side of the surface material (polyurethane foam with polyvinyl chloride decorative sheet, 3 m/m). The molding base material is a phenol resin impregnated fiber board (resin board). Adhesion was carried out using the hot and cold method. That is, the resin board was heated in an oven to a predetermined temperature, then put into a cold press machine, and a surface material temporarily bonded with a hot melt adhesive preheated to around 60° C. was layered and pressed. The pressure was kept constant at 0.3KG/cm 2 .
Adhesion was carried out at the lowest temperature and lowest time limit that would provide sufficient adhesive performance. The results are shown in the table below.
【表】
測定方法
接着剤層の空隙率；接着後の空隙率の測定は困難
なので表面材に接着剤を積層し、さらに離型紙
を重ねこれに120℃にて１分間0.3KG/cm2の圧力
を加える。冷却後離型紙を除去したのち写真撮
影し、空隙率を測定しこれを接着時の空隙率に
代行した。
接着強度；接着後24時間後にＴ剥離強度を測定し
た。表面材のウレタンフオーム材破で合格とし
た。
耐熱性；180℃剥離の型で500ｇ／25mmの荷重をか
けた状態でオーブンに入れ20℃／５分の昇温を
行つたとき剥離を生じたときの温度で表示す
る。ただし、95℃以上になると表面材の切断が
生じる。
接着下限温度；レジンボートをオーブンよりとり
出しコールドプレス機に投入し表面温度を測定
しながら接着と実施する。この場合の接着可能
最低温度で表示する。
接着下限時間；接着下限温度で接着可能な時間で
表示する。
吸音率の測定；一定音源からの反射によるエネル
ギー減少を測定した。ただし、表示は接着剤層
のない場合のエネルギー損失を100とし相対的
な比較を行つた。
以上の表から明らかなように自動車成型天井用
の接着剤にはその吸音効果を低下させないために
は本発明方法による繊維状物のウエツブ状ホツト
メルトシートを使用した成型天井が優れているこ
とがわかる。[Table] Measurement method: Porosity of the adhesive layer; Since it is difficult to measure the porosity after adhesion, the adhesive was laminated on the surface material, and release paper was further layered on top of it at 120℃ for 1 minute at 0.3KG/ cm2 . Apply pressure. After cooling, the release paper was removed, a photograph was taken, the porosity was measured, and this was substituted for the porosity at the time of adhesion. Adhesive strength: T-peel strength was measured 24 hours after adhesion. The test was passed because the urethane foam surface material was broken. Heat resistance: Displayed as the temperature at which peeling occurs when a 180°C peel mold is placed in an oven under a load of 500g/25mm and heated to 20°C for 5 minutes. However, if the temperature exceeds 95℃, the surface material will break. Lower limit temperature for adhesion: Take out the resin boat from the oven, put it into a cold press machine, and perform adhesion while measuring the surface temperature. In this case, the minimum temperature at which bonding is possible is indicated. Lower limit adhesion time: Displayed as the time that can be bonded at the lower limit temperature. Measurement of sound absorption coefficient: Measurement of energy reduction due to reflection from a constant sound source. However, relative comparisons were made using the energy loss without adhesive layer as 100. As is clear from the above table, molded ceilings using a web-like hotmelt sheet of fibrous material produced by the method of the present invention are superior in order not to reduce the sound absorption effect of adhesives for automobile molded ceilings. Recognize.
図面は本発明の成型天井を模型的に示したもの
であつて、第１図イは本発明に使用する繊維状物
のウエツブ状ホツトメルトシートの拡大図の一
例、ロは従来のホツトメルトフイルムを示す。第
２図は本発明の自動車用成型天井の断面も含む切
欠き拡大斜面図である。１は繊維ウエツブ状ホツ
トメルトシート、３は成型基材、４は吸音材、５
は表面化粧シートを示す。
The drawings schematically show the molded ceiling of the present invention, and FIG. shows. FIG. 2 is an enlarged cutaway perspective view including a cross section of the molded ceiling for an automobile according to the present invention. 1 is a fiber web-like hot melt sheet, 3 is a molded base material, 4 is a sound absorbing material, 5
indicates a surface decorative sheet.
Claims (1)
る表面材を貼付する際、基材と表面材の接合に繊
維網状ホツトメルトシート接着剤を使用し、接着
後接着剤層の空隙率を20〜80％になるようにした
ことを特徴とする吸音効果を有する自動車用成型
天井の製造法。 ２ 繊維網状ホツトメルトシートはブレンド樹脂
を溶融紡糸し、空気流を用いて延伸し繊維状にし
て自己接着をした特許請求の範囲１に記載の方
法。 ３ 繊維網状ホツトメルトシートは３〜50デニー
ルの繊維状物で目付10〜100ｇ/m2であることを特
徴とする特許請求の範囲１に記載の方法。[Claims] 1. When attaching a molded base material of a molded ceiling for an automobile and a surface material having a sound absorbing material, a fiber reticulated hot melt sheet adhesive is used to bond the base material and the surface material, and the adhesive is applied after bonding. A method for producing a molded ceiling for automobiles having a sound absorbing effect, characterized in that the porosity of the layer is set to 20 to 80%. 2. The method according to claim 1, wherein the fibrous reticulated hot melt sheet is obtained by melt-spinning a blended resin, stretching it using an air stream, making it into a fiber, and making it self-adhesive. 3. The method according to claim 1, wherein the fibrous reticulated hot melt sheet is a fibrous material of 3 to 50 deniers and has a basis weight of 10 to 100 g/ m2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9475577A JPS5429383A (en) | 1977-08-08 | 1977-08-08 | Manufacture of molded ceiling for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9475577A JPS5429383A (en) | 1977-08-08 | 1977-08-08 | Manufacture of molded ceiling for automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5429383A JPS5429383A (en) | 1979-03-05 |
| JPS6117261B2 true JPS6117261B2 (en) | 1986-05-07 |
Family
ID=14118915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9475577A Granted JPS5429383A (en) | 1977-08-08 | 1977-08-08 | Manufacture of molded ceiling for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5429383A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287767A (en) * | 2001-03-23 | 2002-10-04 | Shinnikka Rock Wool Kk | Acoustic material for vehicle and method of manufacturing the same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60162628A (en) * | 1984-02-02 | 1985-08-24 | Chiriyuu Takaron Kk | Manufacture of composite plastic sheet |
| JPH0534278Y2 (en) * | 1987-01-09 | 1993-08-31 | ||
| JPH0534277Y2 (en) * | 1987-01-09 | 1993-08-31 | ||
| GB9004018D0 (en) * | 1990-02-22 | 1990-04-18 | Siderise Ltd | Manufacture of mineral fibre products in layer form |
| JP2007034254A (en) * | 2005-06-23 | 2007-02-08 | Bridgestone Kbg Co Ltd | Porous material-based sound absorbing material with improved sound absorbing performance |
| JP2008001001A (en) * | 2006-06-23 | 2008-01-10 | Shigeru Co Ltd | Method for manufacturing vehicle interior material |
| JP2008119997A (en) * | 2006-11-14 | 2008-05-29 | Inoac Corp | Sheet material for thermoforming |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51112889A (en) * | 1975-03-31 | 1976-10-05 | Nippon Tokushu Toryo Kk | Lining materials for automobile ceiling and method of making the same |
| JPS5288923A (en) * | 1976-01-16 | 1977-07-26 | Daicel Chem Ind Ltd | Interior material for automobile |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652124Y2 (en) * | 1974-11-20 | 1981-12-04 | ||
| JPS52151509U (en) * | 1976-05-12 | 1977-11-17 |
-
1977
- 1977-08-08 JP JP9475577A patent/JPS5429383A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51112889A (en) * | 1975-03-31 | 1976-10-05 | Nippon Tokushu Toryo Kk | Lining materials for automobile ceiling and method of making the same |
| JPS5288923A (en) * | 1976-01-16 | 1977-07-26 | Daicel Chem Ind Ltd | Interior material for automobile |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002287767A (en) * | 2001-03-23 | 2002-10-04 | Shinnikka Rock Wool Kk | Acoustic material for vehicle and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5429383A (en) | 1979-03-05 |
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