JP2004198611A - Sound-absorbing floor mat - Google Patents

Sound-absorbing floor mat Download PDF

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Publication number
JP2004198611A
JP2004198611A JP2002365243A JP2002365243A JP2004198611A JP 2004198611 A JP2004198611 A JP 2004198611A JP 2002365243 A JP2002365243 A JP 2002365243A JP 2002365243 A JP2002365243 A JP 2002365243A JP 2004198611 A JP2004198611 A JP 2004198611A
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JP
Japan
Prior art keywords
nonwoven fabric
resin layer
foamed resin
floor mat
sound
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
Application number
JP2002365243A
Other languages
Japanese (ja)
Inventor
Kazuhiko Kishigami
一彦 岸上
Yasuichi Shimada
保一 嶋田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Amtecs Inc
Original Assignee
Towa Orimono Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Towa Orimono Co Ltd filed Critical Towa Orimono Co Ltd
Priority to JP2002365243A priority Critical patent/JP2004198611A/en
Publication of JP2004198611A publication Critical patent/JP2004198611A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor mat that is superior in sound absorption performance, in particular, at a low frequency band which is important in making clear conversation or the like, and has water-sealing, while holding ventilation. <P>SOLUTION: A foamed resin layer 3 is provided on the rear face of a pile skin material 2, and a composite nonwoven fabric 4, having ventilation and water sealing is laminated on the outer face of the foamed resin layer 3. Since the composite nonwoven fabric 4 transmits the voice of a low-frequency band, conversation in a vehicle or the like is easy to hear, together with sound absorption of the foamed resin layer 3. The foamed resin layer is superior in sound absorption and a cushion is provided on the backsurface of a floor mat 1. Furthermore, since the composite nonwoven fabric having ventilation and water sealing is provided in the outer layer or the inner layer of the foamed resin layer, the composite nonwoven fabric transmits only the voice of the low-frequency band, and conversation in the vehicle or the like becomes easy to hear, by cooperating with sound absorption of the foamed resin layer. Since it has water-sealing properties, handling is simple, without the lowering of the sound absorption performance. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の技術分野】
この発明は、車輌のフロアパネルに敷かれるフロアカーペットに重ね敷きするフロアマットに関する。
【0002】
【従来の技術】
従来から、車床(フロアパネル)に敷くフロアカーペットにさらに重ね敷きするフロアマットには、防音性、制振性を付与するため、その裏面に発泡樹脂層を設けたり(例えば特許文献1)、フエルトや不織布を積層する(例えば特許文献2)ことが行なわれている。しかしながら、この種の緩衝材には、吸水性があるため、雨水や車内清掃時の水が浸入し、防音性が低下するばかりか、乾燥に手間や時間を要する問題がある。さらに、多少の吸音効果があっても、人間の音声帯域の吸音性能に配慮がなされていないため、車内での会話が聞き取り難い問題がある。
【0003】
【特許文献1】
特開平10−71884号公報(段落0002、0006)
【特許文献2】
特開2002−172967号公報(段落0056、0063)
【0004】
【発明の課題】
そこで、この発明の課題は、吸音性能、特に会話などの明瞭化に重要な低周波領域での吸音性能に優れ、通気性を保ちながら遮水性を有するフロアマットを提供することである。
【0005】
【課題の解決手段】
上記の課題を解決するため、この発明においては、パイル表皮材の裏面に、発泡樹脂層を設け、この発泡樹脂層の外面に通気性・遮水性のある複合不織布を積層した構成を採用したのである。この複合不織布を発泡樹脂層の中間に挿入してもよい。この場合、発泡樹脂層の外面に不織布を貼り付け、さらに防滑加工を施しておくのが好ましい。
【0006】
前記複合不織布は、スパンボンド不織布とメルトブロー不織布の少なくとも各1層を積層し一体化したものより成り、メルトブロー不織布の繊度が約0.1〜1.0デジテックスであるのが好ましい。
【0007】
【実施の形態】
以下、この発明の実施形態を添付図面に基づいて説明する。図1に示すように、この発明のフロアマット1は、基布2aにパイル2bを設け、基布2aの裏面にプレコート層2cを設けたパイル表皮材2に、発泡樹脂層3を積層し、その外面に通気性・遮水性のある複合不織布4を積層したものである。また、図2に示すように、発泡樹脂層3a、3bの間に複合不織布4を挟むように積層してもよい。この場合は外面に通常の不織布5を積層しておくのが好ましい。さらに不織布5の外面に、発泡樹脂や天然ゴムなどを点状に塗布するなどの防滑加工を施しておくことができる。
【0008】
前記パイル2bは、カットパイル、ループパイル、カットパイルとループパイルの混合などいずれでもよく、パイルの高さ(長さ)も均一でなく長短混合していてもよい。また、パイルの形成方法も、タフティング、ニードルパンチ、編織などいずれでもよい。基布2aも、織物、ニット、不織布などを用いることができる。
【0009】
前記プレコート層2cは、スチレン−ブタジエン系重合体樹脂、エチレン−酢酸ビニル系重合体樹脂、アクリル系樹脂などを塗布して形成される。塗布量は約30g/m2 〜約150g/m2 が好ましい。
【0010】
前記発泡樹脂層3は、スチレン−ブダジエン系重合体樹脂、メチルメタクリレート−ブタジエン系重合体樹脂、塩化ビニル樹脂、天然ゴムなどを発泡させたものであって、発泡倍率は約1.2倍〜約4.0倍、厚さは約1mm〜約5mmが好ましい。発泡樹脂層3a、3bも同様の材質及び厚みから成る。
【0011】
前記通気性・遮水性複合不織布4は、図3に示すように、スパンボンド不織布4aとメルトブロー不織布4bを積層したものであって、メルトブロー不織布4bの強度の低さをスパンボンド不織布4aの高い強度で補い、通水性のあるスパンボンド不織布4aに遮水性メルトブロー不織布4bを積層することによって、複合不織布4に遮水性が付与されている。この場合、メルトブロー不織布4bは繊度約0.1〜約1.0デジテックスの極細繊維を用いて、気孔が非常に小さく、通気性を有しながら液体透過抵抗性の高いものとする。なお、この複合不織布4は、スパンボンド不織布とメルトブロー不織布を少なくとも各1層以上用いて積層したものであればよい。また、繊維の材料は、ポリプロピレン、ポリエステル、ナイロン等を用いることができる。
【0012】
前記フロアマットの製造工程を図4に示す。図示のように、パイル表皮材2のプレコート層2cを上面にして連続的に供給し、押出機10で発泡樹脂Aを押し出し、圧着ロール21a、21bの間を通過させて発泡樹脂層3aを形成する。次に、複合不織布4を巻戻して前記発泡樹脂層3aの上面に、ロール22a、22bで圧着する。さらに、複合不織布4の上面に押出機11で発泡樹脂Aを押し出して圧着ロール23a、23bの間を通過させ、発泡樹脂層3bを形成し、その外面に不織布5を圧着ロール24a、24bで圧着する。そして、必要に応じて不織布5の外面に押出機12で防滑剤Bを塗布すると、フロアマット1が出来上る。なお図1のフロアマット1を製造する場合は、ロール22a、22bで複合不織布4を圧着する工程まででよい。
【0013】
以下さらに詳細な実施例と比較例を挙げる。
【0014】
【実施例及び比較例】
図5にそれぞれ実施例1〜3、比較例1、2で示す積層構造のフロアマットを用いて吸音効果及び遮水性を検査した。図中、実施例1及び実施例3の発泡樹脂層はスチレン−ブタジエン共重合体樹脂を約2.5倍に発泡したものをそれぞれ約5mm及び約2.5mmの厚さで積層した。比較例2も同様の発泡樹脂層を設けた。実施例2の発泡樹脂層はメチルメタクリレート−ブタジエン共重合体樹脂を約2倍に発泡させた厚さ約3.5mmの発泡樹脂層を用いた。複合不織布は、スパンボンド不織布の間に繊度が約0.1デジテックスのメルトブロー不織布を挟んだ3層構造の不織布を用いた。複合不織布の材質はポリプロピレンで、秤量は約15g/m2 であった。不織布は、ポリエステルから成るニードルパンチ不織布で秤量は100g/m2 であった。防滑層は、スチレン−ブタジエン共重合体樹脂を点状に塗布して形成した。比較例1の熱可塑性樹脂は、厚み約1mmの塩化ビニル樹脂を用いた。
【0015】
上記実施例1〜3、比較例1、2のフロアシートを直径10mmの円板状に切り抜いてサンプルを作製し、ASTME1050(JIS A1405)に基づいて吸音性能を測定した。結果を図6に示す。図から人声の低周波帯域(約300〜2000Hz)での吸音効果が実施例1〜3のいずれも優れていることが判る。
【0016】
遮水性については、水を張った容器内に前記サンプルを裏面から水に浮かべ、10分後水の透過性を調べた。実施例1〜3のいずれも内層の発泡樹脂層に水の浸透が見られなかったが、比較例1は不織布に水が浸透し、比較例2は内層の発泡樹脂層に水が浸透していた。
【0017】
【発明の効果】
この発明によれば、以上のように、フロアマットの裏面に吸音性、クッション性に優れた発泡樹脂層を設け、さらにこの発泡樹脂層の外層または内層に通気性・遮水性のある複合不織布の層を設けたので、前記複合不織布が低周波帯域の音声のみをよく透過させるため、前記発泡樹脂層の吸音性と共働して車内等での会話を聞き取り易くし、また遮水性があるので吸音性能が低下することなく、取り扱いも簡便になる。
【図面の簡単な説明】
【図1】この発明のフロアマットの一例を示す断面図
【図2】この発明のフロアマットの他の例を示す断面図
【図3】複合不織布の例を示す断面図
【図4】フロアマットの製造方法を示す工程図
【図5】実施例及び比較例を示す表
【図6】実施例及び比較例の吸音性を示すグラフ
【符号の説明】
1 フロアマット
2 パイル表皮材
2a 基布
2b パイル
2c プレコート層
3 発泡樹脂層
4 複合不織布
4a スパンボンド不織布
4b メルトブロー不織布
10 押出機
11 押出機
12 押出機
21a、21b ロール
22a、22b ロール
23a、23b ロール
24a、24b ロール
A 発泡樹脂
B 防滑剤
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a floor mat which is laid on a floor carpet laid on a floor panel of a vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, floor mats further laid on a floor carpet laid on a car floor (floor panel) are provided with a foamed resin layer on the back surface thereof in order to impart soundproofing and vibration damping properties (for example, Patent Document 1), and felt. And nonwoven fabrics are laminated (for example, Patent Document 2). However, since this kind of cushioning material has water absorbability, rainwater and water for cleaning the inside of the vehicle enter, so that not only does the soundproof property deteriorate, but also it takes time and effort to dry. Further, even if there is some sound absorbing effect, there is a problem that it is difficult to hear conversation in the car because no consideration is given to the sound absorbing performance of the human voice band.
[0003]
[Patent Document 1]
JP-A-10-71884 (paragraphs 0002 and 0006)
[Patent Document 2]
JP-A-2002-172967 (paragraphs 0056 and 0063)
[0004]
[Problems of the Invention]
Therefore, an object of the present invention is to provide a floor mat which has excellent sound absorbing performance, particularly in a low frequency region important for clarifying conversation and the like, and has water shielding while maintaining air permeability.
[0005]
[Means for solving the problem]
In order to solve the above problems, the present invention adopts a configuration in which a foamed resin layer is provided on the back surface of the pile skin material, and a breathable and water-blocking composite nonwoven fabric is laminated on the outer surface of the foamed resin layer. is there. This composite nonwoven fabric may be inserted in the middle of the foamed resin layer. In this case, it is preferable to attach a nonwoven fabric to the outer surface of the foamed resin layer, and further perform an anti-slip process.
[0006]
The composite nonwoven fabric is formed by laminating and integrating at least one layer each of a spunbonded nonwoven fabric and a meltblown nonwoven fabric, and the meltblown nonwoven fabric preferably has a fineness of about 0.1 to 1.0 digitex.
[0007]
Embodiment
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, a floor mat 1 of the present invention has a pile 2 b provided on a base cloth 2 a and a foam resin layer 3 laminated on a pile skin material 2 provided with a precoat layer 2 c on the back surface of the base cloth 2 a. The nonwoven fabric 4 having air permeability and water shielding is laminated on the outer surface thereof. As shown in FIG. 2, the composite nonwoven fabric 4 may be laminated between the foamed resin layers 3a and 3b. In this case, it is preferable to stack a normal nonwoven fabric 5 on the outer surface. Further, the outer surface of the nonwoven fabric 5 may be subjected to anti-slip processing such as applying a foamed resin or natural rubber in a dot-like manner.
[0008]
The pile 2b may be any of a cut pile, a loop pile, a mixture of a cut pile and a loop pile, and the height (length) of the pile may not be uniform but may be long and short. Further, the pile may be formed by any method such as tufting, needle punching and knitting. As the base fabric 2a, a woven fabric, a knit, a nonwoven fabric, or the like can be used.
[0009]
The precoat layer 2c is formed by applying a styrene-butadiene polymer resin, an ethylene-vinyl acetate polymer resin, an acrylic resin, or the like. The coating amount is preferably about 30 g / m 2 to about 150 g / m 2 .
[0010]
The foamed resin layer 3 is formed by foaming a styrene-butadiene-based polymer resin, a methyl methacrylate-butadiene-based polymer resin, a vinyl chloride resin, a natural rubber, or the like, and has an expansion ratio of about 1.2 to about 1.2. It is preferably 4.0 times and the thickness is about 1 mm to about 5 mm. The foamed resin layers 3a and 3b are also made of the same material and thickness.
[0011]
As shown in FIG. 3, the air-permeable / water-blocking composite nonwoven fabric 4 is formed by laminating a spunbonded nonwoven fabric 4a and a meltblown nonwoven fabric 4b, and the low strength of the meltblown nonwoven fabric 4b is changed to the high strength of the spunbonded nonwoven fabric 4a. The composite non-woven fabric 4 is provided with water-blocking properties by laminating the water-blocking melt-blown non-woven fabric 4b on the water-permeable spun-bond non-woven fabric 4a. In this case, the melt-blown nonwoven fabric 4b is made of ultrafine fibers having a fineness of about 0.1 to about 1.0 digitex, has very small pores, has high air permeability, and has high liquid permeation resistance. Note that the composite nonwoven fabric 4 may be formed by laminating at least one layer of each of a spunbonded nonwoven fabric and a meltblown nonwoven fabric. In addition, as a material of the fiber, polypropylene, polyester, nylon, or the like can be used.
[0012]
FIG. 4 shows a manufacturing process of the floor mat. As shown in the figure, the pre-coat layer 2c of the pile skin material 2 is continuously supplied with the upper surface thereof facing upward, the extruder 10 extrudes the foamed resin A, and the foamed resin A is passed between the pressure rolls 21a and 21b to form the foamed resin layer 3a. I do. Next, the composite nonwoven fabric 4 is unwound and pressure-bonded to the upper surface of the foamed resin layer 3a by the rolls 22a and 22b. Further, the extruder 11 extrudes the foamed resin A onto the upper surface of the composite nonwoven fabric 4 and passes it between the pressure bonding rolls 23a and 23b to form a foamed resin layer 3b, and the nonwoven fabric 5 is pressed on the outer surface by the pressure bonding rolls 24a and 24b. I do. When the anti-slip agent B is applied to the outer surface of the nonwoven fabric 5 by the extruder 12 as needed, the floor mat 1 is completed. When the floor mat 1 shown in FIG. 1 is manufactured, the steps up to the step of pressing the composite nonwoven fabric 4 with the rolls 22a and 22b may be performed.
[0013]
Hereinafter, more detailed examples and comparative examples will be described.
[0014]
[Examples and Comparative Examples]
The sound absorbing effect and the water shielding property were inspected using the floor mats having the laminated structures shown in Examples 1 to 3 and Comparative Examples 1 and 2 in FIG. 5, respectively. In the figure, the foamed resin layers of Example 1 and Example 3 were obtained by foaming a styrene-butadiene copolymer resin about 2.5 times, and were laminated with a thickness of about 5 mm and about 2.5 mm, respectively. Comparative Example 2 was also provided with a similar foamed resin layer. As the foamed resin layer of Example 2, a foamed resin layer having a thickness of about 3.5 mm obtained by foaming methyl methacrylate-butadiene copolymer resin about twice was used. As the composite nonwoven fabric, a nonwoven fabric having a three-layer structure in which a meltblown nonwoven fabric having a fineness of about 0.1 digitex was sandwiched between spunbonded nonwoven fabrics was used. The material of the composite nonwoven fabric was polypropylene, and the weight was about 15 g / m 2 . The non-woven fabric was a needle-punched non-woven fabric made of polyester and weighed 100 g / m 2 . The anti-slip layer was formed by applying a styrene-butadiene copolymer resin in a dot-like manner. As the thermoplastic resin of Comparative Example 1, a vinyl chloride resin having a thickness of about 1 mm was used.
[0015]
Samples were prepared by cutting the floor sheets of Examples 1 to 3 and Comparative Examples 1 and 2 into a disk having a diameter of 10 mm, and the sound absorption performance was measured based on ASTME1050 (JIS A1405). FIG. 6 shows the results. From the figure, it can be seen that the sound absorbing effect in the low frequency band of human voice (about 300 to 2000 Hz) is excellent in all of Examples 1 to 3.
[0016]
Regarding the water barrier property, the sample was floated on water from the back in a container filled with water, and after 10 minutes, the permeability of water was examined. In any of Examples 1 to 3, water did not permeate into the inner foamed resin layer, but in Comparative Example 1, water permeated the nonwoven fabric, and in Comparative Example 2, water permeated into the inner foamed resin layer. Was.
[0017]
【The invention's effect】
According to the present invention, as described above, a sound absorbing property, a foamed resin layer having excellent cushioning properties are provided on the back surface of the floor mat, and the outer or inner layer of the foamed resin layer is formed of a breathable / waterproof composite nonwoven fabric. Since the layer is provided, the composite nonwoven fabric transmits only low-frequency band sound well, so that it is easy to hear conversations in a car or the like in cooperation with the sound absorbing property of the foamed resin layer, and since there is water shielding. The handling becomes simple without a decrease in the sound absorbing performance.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of the floor mat of the present invention. FIG. 2 is a cross-sectional view showing another example of the floor mat of the present invention. FIG. 3 is a cross-sectional view showing an example of a composite nonwoven fabric. FIG. 5 is a process chart showing a method for producing the same. FIG. 5 is a table showing examples and comparative examples. FIG. 6 is a graph showing sound absorbing properties of the examples and comparative examples.
DESCRIPTION OF SYMBOLS 1 Floor mat 2 Pile skin material 2a Base cloth 2b Pile 2c Precoat layer 3 Foam resin layer 4 Composite nonwoven fabric 4a Spunbond nonwoven fabric 4b Melt blown nonwoven fabric 10 Extruder 11 Extruder 12 Extruders 21a, 21b Roll 22a, 22b Roll 23a, 23b Roll 24a, 24b Roll A Foam resin B Anti-slip agent

Claims (6)

パイル表皮材の裏面に、発泡樹脂層を設け、この発泡樹脂層の外面に通気性・遮水性のある複合不織布を積層した吸音フロアマット。A sound-absorbing floor mat in which a foam resin layer is provided on the back surface of the pile skin material, and a composite nonwoven fabric having air permeability and water shielding is laminated on the outer surface of the foam resin layer. パイル表皮材の裏面に、通気性・遮水性のある複合不織布を中間に挿入した発泡樹脂層を設けた吸音フロアマット。A sound-absorbing floor mat in which a foam resin layer with a breathable and water-blocking composite nonwoven fabric inserted in the middle is provided on the back of the pile skin material. 前記発泡樹脂層の外面に不織布を積層した請求項2に記載の吸音フロアマット。The sound absorbing floor mat according to claim 2, wherein a nonwoven fabric is laminated on an outer surface of the foamed resin layer. 前記不織布の外面に防滑加工を施した請求項2または3に記載の吸音フロアマット。The sound-absorbing floor mat according to claim 2 or 3, wherein an outer surface of the nonwoven fabric is subjected to anti-slip processing. 前記複合不織布がスパンボンド不織布とメルトブロー不織布の少なくとも各1層を積層して一体化したものから成る請求項1〜4のいずれかに記載の吸音フロアマット。The sound-absorbing floor mat according to any one of claims 1 to 4, wherein the composite nonwoven fabric is formed by laminating and integrating at least one layer of each of a spunbonded nonwoven fabric and a meltblown nonwoven fabric. 前記メルトブロー不織布の繊度が約0.1〜約1.0デジテックスである請求項1〜5のいずれかに記載の吸音フロアマット。The sound absorbing floor mat according to any one of claims 1 to 5, wherein the melt-blown nonwoven fabric has a fineness of about 0.1 to about 1.0 digitex.
JP2002365243A 2002-12-17 2002-12-17 Sound-absorbing floor mat Pending JP2004198611A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012008473A1 (en) * 2010-07-14 2012-01-19 旭ファイバーグラス株式会社 Sound-absorbing member, method for producing sound-absorbing member, and sheet for sound-absorbing member
CN111994015A (en) * 2018-07-04 2020-11-27 亳州易泽信息科技有限公司 Operation method of collision-resistant protective bottom plate for new energy automobile
JP7468255B2 (en) 2020-08-31 2024-04-16 東レ株式会社 Nonwoven fabric for sound absorption, sound absorbing material, and method for manufacturing nonwoven fabric for sound absorbing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012008473A1 (en) * 2010-07-14 2012-01-19 旭ファイバーグラス株式会社 Sound-absorbing member, method for producing sound-absorbing member, and sheet for sound-absorbing member
CN111994015A (en) * 2018-07-04 2020-11-27 亳州易泽信息科技有限公司 Operation method of collision-resistant protective bottom plate for new energy automobile
CN111994015B (en) * 2018-07-04 2022-02-25 亳州易泽信息科技有限公司 Operation method of collision-resistant protective bottom plate for new energy automobile
JP7468255B2 (en) 2020-08-31 2024-04-16 東レ株式会社 Nonwoven fabric for sound absorption, sound absorbing material, and method for manufacturing nonwoven fabric for sound absorbing

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