JP2002249971A - Sheet for reinforcing under-roof material - Google Patents
Sheet for reinforcing under-roof materialInfo
- Publication number
- JP2002249971A JP2002249971A JP2001051325A JP2001051325A JP2002249971A JP 2002249971 A JP2002249971 A JP 2002249971A JP 2001051325 A JP2001051325 A JP 2001051325A JP 2001051325 A JP2001051325 A JP 2001051325A JP 2002249971 A JP2002249971 A JP 2002249971A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- sheet
- roofing material
- reinforcing
- long
- 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.)
- Granted
Links
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、家屋の屋根などに
おいて防水の目的で使用される屋根下材（以下「ルーフ
ィング材」と称す）の補強用シートに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing sheet for a roofing material (hereinafter referred to as "roofing material") used for waterproofing purposes on a house roof or the like.
【０００２】[0002]
【従来の技術】アスファルトを用いたアスファルトルー
フィングは、古くからビル等の建物の防水用工法として
利用されている工法の一つである。建築物への雨水など
の浸入およびそれに伴う劣化を防ぎ完全な防水層を得る
ため、一般に防水層は、アスファルトと数枚のルーフィ
ング層を積層した厚い層から構成されている。2. Description of the Related Art Asphalt roofing using asphalt is one of construction methods which have been used as a waterproofing method for buildings such as buildings since ancient times. In general, a waterproof layer is composed of a thick layer of asphalt and several roofing layers in order to prevent rainwater and the like from entering a building and deterioration caused by the rainwater, and to obtain a complete waterproof layer.
【０００３】このアスファルトルーフィング層の芯材と
して、近年、熱圧接不織シートやニードルパンチ不織シ
ート等が使用され、不織布に直接アスファルトを含浸し
たものが数多く用いられている。As a core material of the asphalt roofing layer, in recent years, a heat-welded non-woven sheet, a needle-punched non-woven sheet, and the like have been used, and many non-woven fabrics directly impregnated with asphalt have been used.
【０００４】また、一般の家屋などの屋根の下に使用さ
れる屋根下材では、瓦等の屋根表面材によって雨水等の
浸入をある程度防ぐことができるため、上記建築物に求
められる程の高い防水性が要求されないこと、またコス
ト面から、紙や合成紙にアスファルトを含浸またはコー
トしたルーフィング材が積層されることなく使用されて
いるのが現状である。[0004] In addition, underlay materials used under roofs of ordinary houses and the like can prevent rainwater and the like from entering into the roof surface materials such as tiles to some extent, so that they are as high as required for the above-mentioned buildings. From the viewpoint of not requiring waterproofness and cost, the roofing material in which paper or synthetic paper is impregnated or coated with asphalt is used without being laminated.
【０００５】ルーフィング材の屋根への取り付けは、タ
ッカーといわれる大型のステープラーで打ち付けられる
のが一般的であるが、タッカーの針によってシートに穴
があくだけでなく、傾斜面への取り付けであるため、施
工中の外的要因、例えば風力や屋根に登っている作業者
の移動に伴う力や重力等によって、タッカーが打ち込ま
れている穴に強力な力が加わり、その部分を起点として
ルーフィング材に引裂破れが発生しやすくなるという問
題がある。[0005] The roofing material is usually attached to the roof with a large stapler called a tucker, but not only because the tucker's needle punctures the sheet, but also because it is attached to an inclined surface. Due to external factors during construction, such as the wind force or the force due to the movement of workers climbing on the roof, gravity, etc., a strong force is applied to the hole where the tucker is driven, and that part is used as a starting point for roofing material. There is a problem that tearing is likely to occur.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、前記問題点
を解決し、高い引裂強力と高い撥水性能とを併せ持ち、
ルーフィング材と貼り合わせて好適に使用できる屋根下
材補強用シートを提供するものである。DISCLOSURE OF THE INVENTION The present invention solves the above problems and has both high tear strength and high water repellency.
An object of the present invention is to provide a sheet for reinforcing a roof undermaterial that can be suitably used by being bonded to a roofing material.
【０００７】[0007]
【課題を解決するための手段】本発明者らは上記の課題
を解決すべく鋭意研究を重ねた結果、本発明に到達し
た。すなわち本発明は、アスファルトを含浸またはコー
トした防水用屋根下材のための補強材として使用される
補強用シートであって、不織布によって構成され、前記
不織布が、ポリオレフィン系樹脂を鞘成分とし、鞘成分
の融点よりも２０℃以上高い融点を有するポリエステル
系樹脂を芯成分とする芯鞘構造の長繊維からなる長繊維
不織布であり、前記長繊維不織布のＭＤ方向、ＣＤ方向
の引裂強力の合計値が３５Ｎ以上であり、かつＪＩＳ
Ｌ−１０９６に記載のバイレック法で測定した吸水高さ
が０．５ｃｍ未満の撥水性を有することを特徴とする屋
根下材補強用シートを要旨とするものである。Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention. That is, the present invention relates to a reinforcing sheet used as a reinforcing material for a waterproof underlay material impregnated or coated with asphalt, and is constituted by a nonwoven fabric, wherein the nonwoven fabric comprises a polyolefin-based resin as a sheath component. It is a long-fiber nonwoven fabric composed of long fibers having a core-sheath structure having a polyester resin having a melting point higher by at least 20 ° C. than the melting point of the component as a core component, and the total value of the tear strength of the long-fiber nonwoven fabric in the MD and CD directions. Is 35N or more and JIS
The present invention provides a sheet for reinforcing a material under a roof, characterized in that the sheet has a water repellency of less than 0.5 cm as measured by a birec method described in L-1096.
【０００８】このように本発明によれば、補強用シート
を、ポリオレフィン系樹脂を鞘成分とし、鞘成分の融点
よりも２０℃以上高い融点を有するポリエステル系樹脂
を芯成分とする芯鞘構造の長繊維からなる長繊維不織布
で構成することで、アスファルトを含浸またはコートし
たルーフィング材ととともに熱プレス等を行うだけで、
鞘成分のポリオレフィン系樹脂が溶融して補強用シート
とルーフィング材とを容易に一体化できる。As described above, according to the present invention, the reinforcing sheet has a core-sheath structure in which a polyolefin-based resin is used as a sheath component and a polyester-based resin having a melting point higher than the melting point of the sheath component by 20 ° C. or more is used as a core component. By using a long-fiber non-woven fabric made of long fibers, it is only necessary to perform hot pressing together with a roofing material impregnated or coated with asphalt,
The polyolefin resin of the sheath component is melted, and the reinforcing sheet and the roofing material can be easily integrated.
【０００９】また、前記の熱プレス等によりルーフィン
グ材との一体化を行っても、鞘成分のみが溶融して鞘成
分よりも融点の高い芯成分は溶融せずに繊維形態を維持
するため、芯成分によって強力が得られ、さらに長繊維
不織布の引裂強力を調整して、ＭＤ方向、ＣＤ方向の引
裂強力の合計値が３５Ｎ以上となるようにすることで、
ルーフィング材と一体化して屋根下材として使用する際
に、タッカーによる穴に外的要因が加わってもルーフィ
ング材の引裂破れを低減できる。Further, even when the roof component is integrated with the roofing material by the above-described hot press or the like, only the sheath component is melted, and the core component having a higher melting point than the sheath component is not melted and the fiber form is maintained. Strength is obtained by the core component, and the tear strength of the long-fiber nonwoven fabric is further adjusted so that the total value of the tear strength in the MD direction and the CD direction is 35 N or more.
When the roofing material is integrated with the roofing material and used as an under roof material, the tearing of the roofing material can be reduced even when an external factor is added to the hole formed by the tucker.
【００１０】さらに、ＪＩＳ Ｌ−１０９６に記載のバ
イレック法で測定した吸水高さが０．５ｃｍ未満の撥水
性を付与することで、ルーフィング材と一体化して使用
する際に十分な防水性が得られ、さらにルーフィング材
に荷重が加わっても水分が繊維間に沿って走る水走り現
象を抑制できるため、屋根下材補強用シートとして好適
に使用できる。Further, by imparting water repellency having a water absorption height of less than 0.5 cm as measured by a birec method described in JIS L-1096, sufficient waterproofness can be obtained when used integrally with a roofing material. Further, even if a load is applied to the roofing material, the water running phenomenon in which water runs along the space between the fibers can be suppressed, so that the sheet can be suitably used as a sheet for reinforcing a material under a roof.
【００１１】[0011]
【発明の実施の形態】本発明における屋根下材補強用シ
ートは、ポリオレフィン系樹脂を鞘成分とし、鞘成分の
融点よりも２０℃以上高い融点を有するポリエステル系
樹脂を芯成分とする芯鞘構造の長繊維からなる長繊維不
織布にて形成される必要がある。ポリオレフィン系樹脂
としては、ポリプロピレン、ポリエチレン、またこれら
の共重合体が挙げられ、ポリエステル系樹脂としては、
ポリエチレンテレフタレート、ポリブチレンテレフタレ
ート、またはこれらを主体とする共重合体等が挙げられ
る。BEST MODE FOR CARRYING OUT THE INVENTION A sheet for reinforcing underlay material according to the present invention has a core-sheath structure comprising a polyolefin resin as a sheath component and a polyester resin having a melting point higher than the melting point of the sheath component by 20 ° C. or more as a core component. It must be formed of a long-fiber nonwoven fabric made of long fibers. Examples of the polyolefin-based resin include polypropylene, polyethylene, and copolymers thereof, and examples of the polyester-based resin include:
Examples thereof include polyethylene terephthalate, polybutylene terephthalate, and a copolymer containing these as a main component.
【００１２】一般に、屋根下材の補強用シートは、紙や
合成紙にアスファルトを含浸またはコートしたルーフィ
ング材を作る際に、軟化したアスファルトが硬化する前
にルーフィング材の片面に積層し熱プレス等によりルー
フィング材と一体化する。アスファルトは軟化させるた
めに約２００℃以上の高温となっているため、この熱を
利用して一体化することが好ましい。本発明では、高温
のアスファルトを紙に含浸させたルーフィング材の片面
に補強用シートを積層し、一対のロールに通してプレス
することにより、アスファルトが補強用シートの繊維間
空隙に入り込み、またアスファルトの熱により鞘成分を
溶融させて補強用シートとルーフィング材とを容易にか
つ強固に一体化できる。[0012] Generally, when a roofing material for under roof material is made of a roofing material in which asphalt is impregnated or coated on paper or synthetic paper, the sheet is laminated on one side of the roofing material before the softened asphalt hardens, and then hot pressed. To integrate with the roofing material. Since asphalt has a high temperature of about 200 ° C. or more to soften, it is preferable to use this heat to integrate. In the present invention, a reinforcing sheet is laminated on one side of a roofing material in which high-temperature asphalt is impregnated into paper, and is pressed through a pair of rolls, so that the asphalt enters the inter-fiber voids of the reinforcing sheet, and the asphalt By melting the sheath component by the heat, the reinforcing sheet and the roofing material can be easily and firmly integrated.
【００１３】この熱プレスにより鞘成分のポリオレフィ
ン系樹脂が溶融するが、芯成分のポリエステル系樹脂は
鞘成分の融点よりも２０℃以上も高い融点を有するた
め、熱プレスの際の熱では溶融せずに繊維形態を維持す
るため、その芯成分により高い引裂強力を保持すること
ができる。ルーフィング材の補強用シートとして十分な
引裂強力を発揮するためには、熱プレス前の長繊維不織
布の引裂強力を、ＪＩＳＬ−１９０６のシングルタング
引裂法で測定したときのＭＤ方向、ＣＤ方向の引裂強力
の合計値を３５Ｎ以上とする必要がある。引裂強力の合
計値が３５Ｎ未満であると、タッカーの穴に外的要因が
加わった際に、タッカーの穴を起点としてルーフィング
材の引裂破れが生じることとなる。Although the polyolefin resin of the sheath component is melted by the hot pressing, the polyester resin of the core component has a melting point higher than the melting point of the sheath component by 20 ° C. or more. In this case, the core component of the fiber can maintain high tear strength. In order to exhibit sufficient tear strength as a reinforcing sheet for a roofing material, the tear strength of the long-fiber nonwoven fabric before hot pressing is measured in the MD and CD directions as measured by the single tongue tearing method of JISL-1906. It is necessary that the total value of the strength be 35 N or more. If the total value of the tear strength is less than 35N, when an external factor is applied to the hole of the tucker, the tearing of the roofing material starts from the hole of the tucker.
【００１４】また、補強用シートとルーフィング材とを
一体化した屋根下材は、防水を目的として使用されるた
め、ルーフィング材だけでなく補強用シートにも撥水性
が要求され、補強用シートは、ＪＩＳ Ｌ−１０９６に
記載のバイレック法で測定した吸水高さが０．５ｃｍ未
満の撥水性を有する必要がある。吸水高さが０．５ｃｍ
以上であると十分な撥水性を有するとはいえず、このよ
うな補強用シートでは、例えば、ルーフィング材にアス
ファルトによる荷重や屋根表面材等の重みにより荷重が
加わった場合に、進入してきた雨滴が補強用シートの表
面や内部の繊維間に沿って走るいわゆる「水走り現象」
が生じることとなる。[0014] Further, since the under-roof material in which the reinforcing sheet and the roofing material are integrated is used for the purpose of waterproofing, not only the roofing material but also the reinforcing sheet is required to have water repellency. And a water repellency of less than 0.5 cm as measured by a birec method described in JIS L-1096. Water absorption height is 0.5cm
If it is above, it cannot be said that it has sufficient water repellency, and in such a reinforcing sheet, for example, when a load is applied to the roofing material due to the load of asphalt or the weight of the roof surface material, raindrops that have entered Running along the surface of the reinforcing sheet and between the fibers inside the so-called "water running phenomenon"
Will occur.
【００１５】本発明では、上記のように不織布を構成す
る長繊維の鞘成分に、撥水性に優れたポリオレフィン系
樹脂を用いているため、所望の撥水性を付与できる。ポ
リオレフィン系樹脂としては、前記の吸水高さが０．５
ｃｍ未満となる撥水性を有するものであれば特に限定さ
れるものではない。また、さらに撥水性能を高めるため
に、長繊維不織布に撥水剤を付与してもよい。In the present invention, since a polyolefin resin having excellent water repellency is used for the sheath component of the long fiber constituting the nonwoven fabric as described above, desired water repellency can be imparted. As the polyolefin resin, the water absorption height is 0.5
The material is not particularly limited as long as it has a water repellency of less than 1 cm. Further, in order to further improve the water repellency, a water repellent may be added to the long-fiber nonwoven fabric.
【００１６】なお、補強用シートの撥水性だけを考慮す
ると、例えば繊維表面がポリエステル系やナイロン系の
ように十分な撥水性を有しない樹脂からなる不織布を用
い、シリコン系やフッ素系のいわゆる撥水剤を付与する
ことで本願発明と同様な撥水性を有する不織布を作成す
ることも考えられるが、このような構成では、撥水剤の
耐久性により撥水性能が低下した場合や撥水性の付与ム
ラが生じた際に、この撥水性能の低下個所や付与ムラ個
所に水分が集中して上記の「水走り現象」が生じるた
め、本発明のように構成素材そのものが十分な撥水性を
有している必要がある。Considering only the water repellency of the reinforcing sheet, for example, a nonwoven fabric made of a resin whose fiber surface does not have sufficient water repellency, such as polyester or nylon, is used. Although it is also conceivable to create a nonwoven fabric having the same water repellency as the present invention by applying a liquid agent, in such a configuration, when the water repellency is reduced due to the durability of the water repellent or when the water repellency is reduced. When the application unevenness occurs, since the above-mentioned `` water running phenomenon '' occurs due to the concentration of water at the location where the water repellency is reduced or the application unevenness location, the constituent material itself has sufficient water repellency as in the present invention. Must have.
【００１７】上記のように構成された補強用シートを構
成する長繊維不織布の単糸繊度、目付は、前記の目的と
する引裂強力を得られるよう適宜選択すればよいが、単
糸繊度としては１．５ｄｔｅｘ以上、１０ｄｔｅｘ以下
であることが望ましい。The single-fiber fineness and the basis weight of the long-fiber nonwoven fabric constituting the reinforcing sheet configured as described above may be appropriately selected so as to obtain the desired tear strength. It is desirable to be 1.5 dtex or more and 10 dtex or less.
【００１８】単糸繊度が１．５ｄｔｅｘ以下であると単
糸の強力が落ち、単糸に依存されやすい引裂強力が大幅
に低下するため、より大きな目付量が必要となる。目付
量が大きくなると不織布層の厚みが大きくなり、ルーフ
ィング材の継ぎ目である重ね部分に空間が生じて、漏水
の原因となりやすくなるため好ましくない。また、不織
布層の厚みが増すことでルーフィング材の嵩が大きくな
り、ただでさえ不安定な施工現場において、取り扱いが
困難となる。これらの理由から、長繊維不織布の目付
は、７０ｇ／ｍ2以下であることが望ましい。目付の下
限としては、１５ｇ／ｍ2程度とする。１５ｇ／ｍ2未満
では、目的とする引裂強力が得られない傾向となる。If the single yarn fineness is 1.5 dtex or less, the strength of the single yarn is reduced, and the tear strength, which is liable to the single yarn, is greatly reduced, so that a larger weight per unit area is required. If the weight per unit area is large, the thickness of the nonwoven fabric layer becomes large, and a space is formed in the overlapped portion which is a joint of the roofing material, which is not preferable because it easily causes water leakage. In addition, as the thickness of the nonwoven fabric layer increases, the bulk of the roofing material increases, which makes handling difficult even at an unstable construction site. For these reasons, the basis weight of the long-fiber nonwoven fabric is desirably 70 g / m 2 or less. The lower limit of the basis weight is about 15 g / m 2 . If it is less than 15 g / m 2 , the desired tear strength tends not to be obtained.
【００１９】一方、単糸繊度が１０ｄｔｅｘ以上である
と、補強用シートとしての引裂強力は十分得られるが、
不織布の製造工程における紡糸工程で製糸性が大きく劣
るため好ましくない。On the other hand, when the single yarn fineness is 10 dtex or more, the tear strength as a reinforcing sheet can be sufficiently obtained.
It is not preferable because the spinning property in the spinning step in the nonwoven fabric manufacturing step is significantly poor.
【００２０】以下に本発明の屋根下材補強用シートの製
造方法について、一例を挙げて説明する。まず、本発明
の補強用シートを構成するための長繊維不織布は、いわ
ゆるスパンボンド法にて効率よく製造することができ
る。すなわち、常法により、上記の鞘成分を構成するポ
リオレフィン系樹脂と芯成分を構成するポリエステル系
樹脂とを個別に加熱溶融して通常の芯鞘型複合口金から
吐出させ、得られた紡出糸条を従来公知の横型吹付や環
状吹付などの冷却装置を用いて冷却し、その後、エアー
サッカーなどの吸引装置にて牽引細化する。引き続き、
吸引装置から排出された糸条群を開繊させた後、スクリ
ーンからなるコンベアの如き移動体積装置上に堆積させ
てウェブとする。次いで、この移動堆積装置上に形成さ
れたウェブに、部分的に熱圧着を施すことにより、得る
ことができる。Hereinafter, a method for producing a sheet for reinforcing under-roof material according to the present invention will be described with reference to an example. First, the long-fiber nonwoven fabric for forming the reinforcing sheet of the present invention can be efficiently produced by a so-called spunbond method. That is, by a conventional method, the polyolefin-based resin constituting the above-mentioned sheath component and the polyester-based resin constituting the core component are individually heated and melted and discharged from a usual core-sheath type composite die, and the obtained spun yarn is obtained. The strip is cooled by using a conventionally known cooling device such as a horizontal spray or an annular spray, and then the strip is drawn down by a suction device such as an air soccer. Continued
After the yarn group discharged from the suction device is spread, it is deposited on a moving volume device such as a conveyor made of a screen to form a web. Next, the web formed on the moving deposition apparatus can be obtained by partially performing thermocompression bonding.
【００２１】部分的熱圧着は、例えば、加熱されたエン
ボスロールと表面が平滑なフラットロールとの間、もし
くは一対のエンボスロールの間に長繊維ウェブを通し
て、エンボスロールの凸部が当接する部位の構成繊維を
熱により軟化または溶融させて点状の熱接着部を形成す
る方法、またはパターンロール上で超音波による高周波
を印加してパターン部に当接する構成繊維に点状の圧着
部を形成する方法などにより行われる。長繊維不織布の
表面積に対する熱圧着部の総面積（熱圧着率）は、４〜
４０％であるのが好ましく、特に１０〜２０％であるの
が好ましい。熱圧着率が４％未満であると、繊維間の接
着が不足するため不織布表面に毛羽が生じ、ルーフィン
グ材との貼り合わせ工程で、毛羽に付着した溶融アスフ
ァルトによって圧着ロールに不織布が付着するというト
ラブル等が発生することになり、一方、４０％を超える
と、不織布がペーパライクとなって引裂強力に劣る傾向
となり、本発明の目的を達成することができなくなる。Partial thermocompression bonding is performed, for example, by passing a long fiber web between a heated embossing roll and a flat roll having a smooth surface, or between a pair of embossing rolls, at a position where a convex portion of the embossing roll abuts. A method in which the constituent fibers are softened or melted by heat to form a point-like heat-bonded portion, or a high-frequency ultrasonic wave is applied on a pattern roll to form a point-like pressure-bonded portion in the constituent fibers in contact with the pattern portion. It is performed by a method or the like. The total area (thermocompression ratio) of the thermocompression bonding part with respect to the surface area of the long-fiber nonwoven fabric is 4 to
It is preferably 40%, particularly preferably 10-20%. If the thermocompression bonding ratio is less than 4%, the nonwoven fabric adheres to the compression roll due to the molten asphalt adhered to the fluff in the bonding process with the roofing material due to insufficient bonding between the fibers and the nonwoven fabric surface. If it exceeds 40%, on the other hand, if it exceeds 40%, the nonwoven fabric becomes paper-like and tends to have poor tear strength, and the object of the present invention cannot be achieved.
【００２２】ウェブに部分的な熱圧着処理を施す際の熱
処理温度、すなわち、ロールの表面温度は、鞘成分のポ
リオレフィン系重合体の融点をＴｍとしたとき、（Ｔｍ
−２０）〜Ｔｍ℃の範囲で熱圧着することが好ましい。
ロール表面温度が（Ｔｍ−２０）℃よりも低い場合に
は、熱圧着部の接着が十分に行えず得られる不織布は寸
法安定性に劣るものとなり、逆に、Ｔｍ℃を超えると、
融解した重合体がロールに付着するなどして操業性を著
しく損なうばかりでなく、柔軟で風合いの良い不織布を
得難くなる。The heat treatment temperature at the time of performing a partial thermocompression treatment on the web, that is, the surface temperature of the roll, is given by (Tm) where Tm is the melting point of the polyolefin polymer as the sheath component.
It is preferable to perform thermocompression bonding in the range of −20) to Tm ° C.
If the roll surface temperature is lower than (Tm-20) ° C., the resulting nonwoven fabric cannot be sufficiently bonded at the thermocompression bonding portion, resulting in poor dimensional stability.
Not only does the meltability of the polymer impair the operability due to adhesion to the rolls, but also makes it difficult to obtain a soft nonwoven fabric having a good texture.
【００２３】[0023]
【実施例】次に、実施例に基づき本発明を具体的に説明
するが、本発明はこれらの実施例のみに限定されるもの
ではない。なお、以下の実施例、比較例における各種物
性値の測定は以下の方法により実施した。 （１）引裂強力（Ｎ）；ＪＩＳ Ｌ−１９０６に記載の
シングルタング法に準じて測定した。 （２）撥水性（ｃｍ）；ＪＩＳ Ｌ−１０９６に記載の
バイレック法に準じ、試料の静置時間を２４時間として
測定した。 （３）屋根下材の評価：溶融させた高温のアスファルト
を紙に含浸させたルーフィング材の片面に作成した長繊
維不織布を積層し、一対の圧着ロール間に通して熱プレ
スし、長繊維不織布とルーフィング材とが一体化された
屋根下材を作成し、以下の評価を行った。Next, the present invention will be specifically described based on examples, but the present invention is not limited to only these examples. In addition, the measurement of various physical property values in the following Examples and Comparative Examples was performed by the following methods. (1) Tear strength (N): Measured according to the single tongue method described in JIS L-1906. (2) Water repellency (cm): Measured based on the birec method described in JIS L-1096, with the sample left standing for 24 hours. (3) Evaluation of under-roof material: Laminated long-fiber nonwoven fabric was laminated on one side of a roofing material in which molten high-temperature asphalt was impregnated into paper, passed between a pair of pressure rolls, and hot-pressed to form a long-fiber nonwoven fabric. And a roofing material in which the roofing material and the roofing material were integrated, and the following evaluation was performed.
【００２４】 ○：ルーフィング材の引裂破れが生じにくく、好適に使
用できた。 ×：引裂強力に劣っていた。 実施例１ 屋根下材補強用シートを形成する長繊維不織布を、以下
の手順にて作成した。：: The roofing material was less likely to tear and tear, and could be suitably used. X: The tear strength was poor. Example 1 A long-fiber nonwoven fabric forming a sheet for reinforcing under-roof material was prepared by the following procedure.
【００２５】ポリエチレンテレフタレートを芯成分、高
密度ポリエチレンを鞘成分として、芯成分と鞘成分の複
合比（質量比）が１／１となるように芯鞘型複合繊維を
紡出し、エアーサッカーにて単糸繊度が３ｄｔｅｘにな
るよう引き取った。延伸後のフィラメントをネット上
に、単位面積当りの重量が２５ｇのウェブとなるように
捕集堆積させた。Using a core component of polyethylene terephthalate and a sheath component of high-density polyethylene, a core-sheath type composite fiber is spun so that the complex ratio (mass ratio) of the core component and the sheath component becomes 1/1, and the mixture is air-sucked. The single yarn fineness was pulled to 3 dtex. The drawn filaments were collected and deposited on a net so that a web having a weight per unit area of 25 g was obtained.
【００２６】得られたウェブを、ロール温度を１２５℃
としたエンボスロールとスムースロールからなる一対の
ロールにて部分的に熱圧着して、目付が２５ｇ／ｍ2、
熱圧着率１６％の長繊維不織布を得た。The obtained web is heated at a roll temperature of 125 ° C.
Partially thermocompression-bonded with a pair of rolls consisting of an embossing roll and a smooth roll having a basis weight of 25 g / m 2 ,
A long-fiber nonwoven fabric with a thermocompression bonding ratio of 16% was obtained.
【００２７】この長繊維不織布からなる屋根下材補強用
シートをアスファルトルーフィング材と熱プレスして、
屋根下材として用いた。得られた補強用シートの物性、
屋根下材の評価等を表１に示す。The underfloor reinforcement sheet made of the long-fiber nonwoven fabric is hot pressed with an asphalt roofing material,
Used as roof underlayment. Physical properties of the obtained reinforcing sheet,
Table 1 shows the evaluation of the under roof material.
【００２８】[0028]
【表１】 実施例２ 実施例１で得られた長繊維不織布に、シリコーン系撥水
剤（竹本油脂製ＮＲＥ−１６２）を１％付与した。[Table 1] Example 2 1% of a silicone water repellent (NRE-162 manufactured by Takemoto Yushi) was applied to the long-fiber nonwoven fabric obtained in Example 1.
【００２９】この長繊維不織布からなる屋根下材補強用
シートをアスファルトルーフィング材と熱プレスして、
屋根下材として用いた。得られた補強用シートの物性、
屋根下材の評価等を表１に示す。The underfloor reinforcement sheet made of the long-fiber nonwoven fabric is hot pressed with an asphalt roofing material,
Used as roof underlayment. Physical properties of the obtained reinforcing sheet,
Table 1 shows the evaluation of the under roof material.
【００３０】実施例１は、補強用シートを、ポリオレフ
ィン系樹脂を鞘成分としポリエステル系樹脂を芯成分と
する芯鞘構造の長繊維不織布にて構成し、長繊維不織布
の引裂強力が３５Ｎ以上、撥水性が０．５ｃｍ未満とな
るようにその単糸繊度と目付を調整したため、引裂強力
と撥水性に優れた補強用シートが得られた。この補強用
シートは、長繊維の鞘成分をアスファルトとのなじみの
良いポリオレフィンで構成されているため、アスファル
トを含浸またはコートしたルーフィング材と熱プレスに
より容易に一体化できた。得られた屋根下材は、上記の
ように引裂強力と撥水性に優れた補強用シートを用いた
ため、タッカーの打ち込みや、風や作業者の移動などの
外的要因によるルーフィング材の引裂破れを低減でき、
しかも十分な防水性を有し、ルーフィング材に荷重が加
わった場合でも水走り現象を抑制できる実使用に適した
ものであった。In Example 1, the reinforcing sheet is composed of a long-fiber nonwoven fabric having a core-sheath structure having a polyolefin-based resin as a sheath component and a polyester-based resin as a core component. Since the single-fiber fineness and the basis weight were adjusted so that the water repellency was less than 0.5 cm, a reinforcing sheet excellent in tear strength and water repellency was obtained. Since this reinforcing sheet is composed of a polyolefin having a sheath component of long fibers that is compatible with asphalt, it can be easily integrated with a roofing material impregnated or coated with asphalt by hot pressing. Since the obtained under roof material uses a reinforcing sheet with excellent tear strength and water repellency as described above, the roofing material tears and tears due to external factors such as hammering of tuckers, wind and movement of workers. Can be reduced,
Moreover, it has sufficient waterproofness and is suitable for actual use in which the water running phenomenon can be suppressed even when a load is applied to the roofing material.
【００３１】また、実施例２では、実施例１で作成した
長繊維不織布にさらにシリコーン系撥水剤を配合したた
め、より撥水性に優れた補強用シートと屋根下材が得ら
れた。 比較例１ 長繊維をポリエチレンテレフタレートのみを用いて作成
し、そしてそれ以外は実施例１と同様にして長繊維不織
布を作成した。Further, in Example 2, since the silicone-based water repellent was further added to the long-fiber nonwoven fabric prepared in Example 1, a reinforcing sheet and a roofing material having more excellent water repellency were obtained. Comparative Example 1 A long fiber nonwoven fabric was prepared in the same manner as in Example 1 except that a long fiber was prepared using only polyethylene terephthalate.
【００３２】この長繊維不織布からなる屋根下材補強用
シートをアスファルトルーフィング材と熱プレスして屋
根下材を作成した。得られた補強用シートの物性、屋根
下材の評価等を表１に示す。 比較例２ 長繊維をポリプロピレンのみを用いて作成し、そしてそ
れ以外は実施例１と同様にして長繊維不織布を作成し
た。The underfloor roofing sheet made of the long-fiber nonwoven fabric was hot-pressed with an asphalt roofing material to prepare a underfloor roofing material. Table 1 shows the physical properties of the obtained reinforcing sheet, the evaluation of the material under the roof, and the like. Comparative Example 2 A long fiber nonwoven fabric was prepared in the same manner as in Example 1 except that a long fiber was prepared using only polypropylene.
【００３３】また、この長繊維不織布からなる補強用シ
ートをアスファルトルーフィング材と熱プレスして屋根
下材を作成した。得られた補強用シートの物性、屋根下
材の評価等を表１に示す。The reinforcing sheet made of the long-fiber non-woven fabric was hot-pressed with an asphalt roofing material to produce a roof undermaterial. Table 1 shows the physical properties of the obtained reinforcing sheet, the evaluation of the material under the roof, and the like.
【００３４】比較例１は、構成繊維として引裂強度の高
いポリエチレンテレフタレートのみを用いたため、引裂
強力には優れるものの、撥水性に劣るものであった。ま
た、補強用シートとルーフィング材とを一体化した屋根
下材は、補強用シートの撥水性に劣るためいわゆる水走
り現象などが生じ、実使用に耐え得るものではなかっ
た。In Comparative Example 1, since only polyethylene terephthalate having a high tear strength was used as a constituent fiber, the tear strength was excellent, but the water repellency was poor. Further, the underlaying material in which the reinforcing sheet and the roofing material are integrated has a poor water repellency of the reinforcing sheet, so that a so-called water running phenomenon or the like occurs, and the sheet cannot be put to practical use.
【００３５】また、比較例２は、構成繊維としてポリプ
ロピレンのみを使用したため、得られた補強用シート
は、撥水性には優れるものの引裂強力に劣るものとなっ
た。また、この補強用シートをルーフィング材と一体化
するために熱プレスすると、補強用シートの全面が溶融
してフィルム状となってルーフィング材に貼り付き、引
裂強力に劣るものとなった。In Comparative Example 2, since only polypropylene was used as a constituent fiber, the obtained reinforcing sheet was excellent in water repellency but was inferior in tear strength. In addition, when the reinforcing sheet was hot-pressed to be integrated with the roofing material, the entire surface of the reinforcing sheet was melted and formed into a film and stuck to the roofing material, resulting in poor tear strength.
【００３６】[0036]
【発明の効果】このように本発明によれば、ポリオレフ
ィン系樹脂を鞘成分とし、鞘成分の融点よりも２０℃以
上高い融点を有するポリエステル系樹脂を芯成分とする
芯鞘構造の長繊維からなる長繊維不織布を補強用シート
とすることで、アスファルトを含浸またはコートしたル
ーフィング材とともにこの補強用シートを熱プレスする
だけで、鞘成分のポリオレフィンの溶融により補強用シ
ートとルーフィング材とを容易に一体化できる。As described above, according to the present invention, a long fiber having a core-sheath structure comprising a polyolefin-based resin as a sheath component and a polyester-based resin having a melting point of at least 20 ° C. higher than the melting point of the sheath component as a core component. By using a long-fiber non-woven fabric as a reinforcing sheet, the reinforcing sheet can be easily formed by melting the sheath component polyolefin simply by hot-pressing this reinforcing sheet together with a roofing material impregnated or coated with asphalt. Can be integrated.
【００３７】また、このような熱プレスによるルーフィ
ング材との一体化を行っても、鞘成分のみが溶融して鞘
成分よりも融点の高い芯成分は溶融せずに繊維形態を維
持するため、芯成分によって強力が保持され、さらに長
繊維不織布の引裂強力を、ＭＤ方向、ＣＤ方向の引裂強
力の合計値が３５Ｎ以上となるようにすることで、ルー
フィング材と一体化して使用する際にタッカーによる穴
に外的要因が加わっても、ルーフィング材の引裂破れを
低減できる。Further, even when such integration with the roofing material is performed by the hot press, only the sheath component is melted, and the core component having a higher melting point than the sheath component is not melted, and the fiber form is maintained. By maintaining the strength by the core component and making the total strength of the tear strength of the long-fiber nonwoven fabric more than 35 N in the MD direction and the CD direction, the tucker is used when integrated with the roofing material. Even if an external factor is added to the hole due to, the tearing and tearing of the roofing material can be reduced.
【００３８】さらに、不織布の構成繊維表面（鞘部）
が、撥水性を有するポリオレフィン系樹脂によって構成
されているため、ＪＩＳ Ｌ−１０９６に記載のバイレ
ック法で測定した吸水高さが０．５ｃｍ未満の撥水性を
付与することができ、ルーフィング材と一体化して使用
する際に十分な防水性が得られ、さらにルーフィング材
に荷重が加わっても水分が繊維間に沿って走る「水走り
現象」を抑制できるため、屋根下材補強用シートとして
好適に使用できる。Further, the constituent fiber surface of the nonwoven fabric (sheath portion)
Is made of a polyolefin resin having water repellency, so that water repellency having a water absorption height of less than 0.5 cm measured by a birec method described in JIS L-1096 can be imparted, and it can be integrated with a roofing material. When used as a roofing material, sufficient waterproofness can be obtained, and even if a load is applied to the roofing material, water can run along the fibers and the `` water running phenomenon '' can be suppressed. Can be used.
Claims (1)
水用屋根下材のための補強材として使用される補強用シ
ートであって、不織布によって構成され、前記不織布
が、ポリオレフィン系樹脂を鞘成分とし、鞘成分の融点
よりも２０℃以上高い融点を有するポリエステル系樹脂
を芯成分とする芯鞘構造の長繊維からなる長繊維不織布
であり、前記長繊維不織布のＭＤ方向、ＣＤ方向の引裂
強力の合計値が３５Ｎ以上であり、かつＪＩＳ Ｌ−１
０９６に記載のバイレック法で測定した吸水高さが０．
５ｃｍ未満の撥水性を有することを特徴とする屋根下材
補強用シート。1. A reinforcing sheet used as a reinforcing material for a waterproof roofing material impregnated or coated with asphalt, comprising a nonwoven fabric, wherein the nonwoven fabric comprises a polyolefin-based resin as a sheath component, It is a long-fiber nonwoven fabric composed of long fibers having a core-sheath structure having a polyester resin having a melting point higher by at least 20 ° C. than the melting point of the component as a core component, and the total value of the tear strength of the long-fiber nonwoven fabric in the MD and CD directions. Is 35N or more and JIS L-1
096, the water absorption height measured by the birec method is 0.
A sheet for reinforcing a roof undermaterial, having a water repellency of less than 5 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001051325A JP4618908B2 (en) | 2001-02-27 | 2001-02-27 | Reinforcing sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001051325A JP4618908B2 (en) | 2001-02-27 | 2001-02-27 | Reinforcing sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002249971A true JP2002249971A (en) | 2002-09-06 |
| JP4618908B2 JP4618908B2 (en) | 2011-01-26 |
Family
ID=18912129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001051325A Expired - Lifetime JP4618908B2 (en) | 2001-02-27 | 2001-02-27 | Reinforcing sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4618908B2 (en) |
Cited By (6)
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|---|---|---|---|---|
| JP2008261188A (en) * | 2007-04-16 | 2008-10-30 | Daiwa Gravure Co Ltd | Underlayer sheet for waterproofing building roof |
| KR101153559B1 (en) | 2011-12-14 | 2012-06-11 | 선구산업(주) | Waterproof sheet with protective oil-soluble rubber asphalt in a body and method constructing the complex waterproof sheets thereof with recycling release polyethylene film of waste disposal |
| JP6359214B1 (en) * | 2017-07-14 | 2018-07-18 | ユニチカ株式会社 | Production method of fishing net |
| JP6437686B1 (en) * | 2018-05-18 | 2018-12-12 | ユニチカ株式会社 | Production method of fishing net |
| JP2020165282A (en) * | 2019-03-28 | 2020-10-08 | 日新工業株式会社 | Skin sheet for roofing sheet and roofing sheet with skin sheet |
| US10808342B2 (en) | 2017-07-14 | 2020-10-20 | Unitika Ltd. | Method for manufacturing fishing net |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230313449A1 (en) * | 2020-09-02 | 2023-10-05 | Tietex International Ltd. | Roofing Material and Related Method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2008261188A (en) * | 2007-04-16 | 2008-10-30 | Daiwa Gravure Co Ltd | Underlayer sheet for waterproofing building roof |
| KR101153559B1 (en) | 2011-12-14 | 2012-06-11 | 선구산업(주) | Waterproof sheet with protective oil-soluble rubber asphalt in a body and method constructing the complex waterproof sheets thereof with recycling release polyethylene film of waste disposal |
| JP6359214B1 (en) * | 2017-07-14 | 2018-07-18 | ユニチカ株式会社 | Production method of fishing net |
| JP2019017380A (en) * | 2017-07-14 | 2019-02-07 | ユニチカ株式会社 | Method for manufacturing fishing net |
| US10808342B2 (en) | 2017-07-14 | 2020-10-20 | Unitika Ltd. | Method for manufacturing fishing net |
| JP6437686B1 (en) * | 2018-05-18 | 2018-12-12 | ユニチカ株式会社 | Production method of fishing net |
| JP2019198294A (en) * | 2018-05-18 | 2019-11-21 | ユニチカ株式会社 | Production method of fishing net |
| JP2020165282A (en) * | 2019-03-28 | 2020-10-08 | 日新工業株式会社 | Skin sheet for roofing sheet and roofing sheet with skin sheet |
| JP7429917B2 (en) | 2019-03-28 | 2024-02-09 | 日新工業株式会社 | Skin sheet for roofing sheet and roofing sheet with skin sheet |
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| JP4618908B2 (en) | 2011-01-26 |
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