JPH06212547A - Heat-resistant rugging sheet - Google Patents
Heat-resistant rugging sheetInfo
- Publication number
- JPH06212547A JPH06212547A JP672793A JP672793A JPH06212547A JP H06212547 A JPH06212547 A JP H06212547A JP 672793 A JP672793 A JP 672793A JP 672793 A JP672793 A JP 672793A JP H06212547 A JPH06212547 A JP H06212547A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- sheet
- rugging
- crimp
- fiber
- 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
- Thermal Insulation (AREA)
- Nonwoven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は高温管状体の保温・断熱
用に好適な耐熱ラギングシートに関する。さらに詳しく
述べると耐熱性に優れ、かつ耐久性が改善されたラギン
グシートに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant lagging sheet suitable for heat insulation and heat insulation of a high temperature tubular body. More specifically, it relates to a lagging sheet having excellent heat resistance and improved durability.
【０００２】[0002]
【従来技術】従来より石綿、ガラスウール等が保温・断
熱分野で広範囲に多用されてきたことは周知のところで
ある。これらの素材は保温・断熱材として優れた性能を
発揮するが、一方でこれらの素材に起因する職業性疾病
や環境問題が顕在化するにいたり代替え可能な素材の検
討が行われてきた。中でも芳香族ポリアミド系繊維やポ
リビニルアルコール系繊維は性能的に保温・断熱用素材
として注目され、近年広範囲に利用されるようになっ
た。一方、保温・断熱工事の効率化の要求も年々高ま
り、保温・断熱材の形態・構成の改善が行われてきた。
例えば芳香族ポリアミド系繊維の不織布とホットメルト
型可撓性多孔薄層とを積層一体化したラギングシートが
知られている。2. Description of the Related Art It is well known that asbestos, glass wool and the like have been widely used in the field of heat insulation and heat insulation. These materials have excellent performance as a heat insulating / insulating material, but on the other hand, as the occupational diseases and environmental problems caused by these materials become apparent, alternative materials have been studied. Among them, aromatic polyamide fibers and polyvinyl alcohol fibers have been attracting attention as materials for heat retention and heat insulation in terms of performance, and have been widely used in recent years. On the other hand, the demand for more efficient heat insulation and heat insulation work has been increasing year by year, and the shape and composition of heat insulation and heat insulation materials have been improved.
For example, a lagging sheet in which a nonwoven fabric of aromatic polyamide fibers and a hot-melt type flexible porous thin layer are integrally laminated is known.
【０００３】[0003]
【発明が解決しようとする課題】この耐熱ラギングシー
トは常温で給湿させて粘着性を付与する従来品に較べて
ラッピング作業性は大幅に改善されるが、しかし、配管
の表面温度が４００℃前後の使用条件下における耐久性
は従来品と同一レベルである。つまり、管状体または配
管の表面温度がさらに高くなると芳香族ポリアミド系繊
維は高温長期使用における耐久性や難燃性等は充分とな
る。本発明はかかる事情な鑑みなされたものであって、
ラッピング作業性の低下を伴うことなく大配管表面温度
が４００℃前後の苛酷な条件下で長時間使用に際しても
耐久性の低下が小さく、かつ難燃性を有する耐熱ラギン
グシートの提供を目的とするものである。This heat-resistant lagging sheet has a significantly improved lapping workability as compared with a conventional product which is moistened at room temperature to impart tackiness, but the surface temperature of the pipe is 400 ° C. The durability under the usage conditions before and after is the same level as the conventional product. That is, when the surface temperature of the tubular body or the pipe is further increased, the aromatic polyamide fiber has sufficient durability and flame retardancy in long-term use at high temperature. The present invention has been made in view of such circumstances,
An object of the present invention is to provide a heat-resistant lagging sheet having flame retardancy with little deterioration in durability even under long-term use under severe conditions where the surface temperature of large piping is around 400 ° C without deterioration in wrapping workability. It is a thing.
【０００４】[0004]
【課題を解決するための手段】本発明のラギングシート
は熱分解温度が少なくとも６００℃以上で捲縮数が８コ
／インチ以上、捲縮度／捲縮数が０．７以上の有機合成
繊維からなる不織布の片面に２００℃未満の融点を有す
る熱可塑性重合体の薄膜を形成してなり、そのことによ
り上記目的が達成される。The lagging sheet of the present invention is an organic synthetic fiber having a thermal decomposition temperature of at least 600 ° C., a crimp number of 8 co / inch or more, and a crimp degree / crimp number of 0.7 or more. On one side of a nonwoven fabric made of (1), a thin film of a thermoplastic polymer having a melting point of less than 200 ° C. is formed, thereby achieving the above object.
【０００５】４００℃前後の苛酷な条件下で使用するラ
ギングシートに使用したとき強度低下が少なくまた分解
ガスを発生しない等の熱安定性が必要とされ、かかる苛
酷な温度条件下での耐久性を確保するには少なくとも６
００℃以上の熱分解温度を有する繊維材料が必要であ
り、かかる必要条件を満たすにはポンベンズオキサゾー
ルやポリベンズチアゾール等のポリベンザゾール系繊維
を用いることが好ましい。When used in a lagging sheet which is used under severe conditions of around 400 ° C., it is required to have thermal stability such that the strength does not decrease so much and decomposition gas is not generated, and durability under such severe temperature conditions. At least 6 to ensure
A fiber material having a thermal decomposition temperature of 00 ° C. or higher is required, and it is preferable to use a polybenzazole fiber such as ponbenzoxazole or polybenzthiazole in order to satisfy the requirement.
【０００６】保温・断熱材は長繊維の編織物を用いて構
成されるラギングクロスまたは不織布の形態で構成され
るラギングシート等があるが本発明においては保温・断
熱効果を高めるため嵩高的に有利である不織布の形態に
成形する。不織布は短繊維をウエブとしてこれを不織布
に加工する従来公知の何れの方法も採用できるが、前記
したように嵩高とするには好ましくはニードリングまた
はステッチング法を採用することである。As the heat insulating / insulating material, there is a lagging cloth formed by using a knitted fabric of long fibers or a lagging sheet formed in the form of a non-woven fabric. Is formed into a non-woven fabric form. For the non-woven fabric, any conventionally known method of using short fibers as a web and processing the web into a non-woven fabric can be adopted. However, as described above, the needling or stitching method is preferably used to obtain bulkiness.
【０００７】また本発明における耐熱短繊維の捲縮形態
は原綿の取扱い性、カード通過性および製品の嵩高性
（保温・断熱効果）を確保する上で重要であり、かかる
観点から捲縮数は８（個／インチ）以上で且つ捲縮度
（％）／捲縮数が０．７以上が必要であり、好ましくは
１０（個／インチ）以上で且つ捲縮度（％）／捲縮数を
０．９以上とすることである。捲縮数が８（個／イン
チ）未満もしくは捲縮度（％）／捲縮数が０．７未満で
あると短繊維相互の絡合数が相対的に減少するためカー
ド通過性の低下し、また該短繊維を加工して得られるシ
ートは嵩高性の低いものとなる。一方、捲縮数及び捲縮
度（％）／捲縮数の上限に特に制限はないが、両者が極
端に大きい場合、嵩高性が過大となり取扱い性やカード
通過性および得られる不織布の品質等の面で不利とな
る。従って一般的には捲縮数が１８（個／インチ）以下
で且つ捲縮度（％）／捲縮数が１．８以下が採用され
る。尚、繊維に捲縮を付与する方法はクリンパー等の機
械捲縮による方法や、繊維製造工程時に繊維の内部構造
に歪を与えて自然な捲縮を付与する方法等があげられ
る。The crimped form of the heat-resistant short fibers in the present invention is important for ensuring the handleability of raw cotton, the card passing property and the bulkiness of the product (heat retaining / insulating effect). 8 (pieces / inch) or more and a crimping degree (%) / crimping number of 0.7 or more are required, and preferably 10 (pieces / inch) or more and a crimping degree (%) / crimping number Is 0.9 or more. If the number of crimps is less than 8 (pieces / inch) or the degree of crimp (%) / the number of crimps is less than 0.7, the entanglement number of the short fibers is relatively decreased, so that the card passing property is deteriorated. Also, the sheet obtained by processing the short fibers has low bulkiness. On the other hand, the upper limit of the number of crimps and the degree of crimp (%) / the number of crimps is not particularly limited, but when both are extremely large, the bulkiness becomes excessive and the handling property, the card passing property, the quality of the obtained nonwoven fabric, etc. Is disadvantageous in terms of. Therefore, generally, the number of crimps is 18 (pieces / inch) or less and the degree of crimp (%) / the number of crimps is 1.8 or less. Examples of the method for applying crimps to the fibers include a method using mechanical crimps such as a crimper, and a method for imparting natural crimps by imparting strain to the internal structure of the fibers during the fiber manufacturing process.
【０００８】本発明の耐熱ラギングシートはラッピング
作業の効果率を図るため不織布の片面に熱可塑性重合体
の薄膜を形成させる。ここで熱可塑性重合体としては少
なくとも２００℃未満の融点を有することが必要であ
る。該熱可塑性の皮膜を構成する熱可塑性重合体の融点
が２００℃以上であると高温用の管状体の保温・断熱材
のラッピングに際して管状体を２００℃以上の温度に加
熱する必要があり作業者の安全性に問題を生じる。一
方、ラッピング作業またはラギングシートの保存時の環
境温度の上昇によるラギングシート同志の粘着発生を防
止するために熱可塑性重合体の融点は少なくとも５０℃
以上であることが好ましい。またラギングシートの製造
に関しては耐熱性不織布の表面に熱可塑性重合体が皮膜
を形成できることが重要であり、このために例えば低沸
点の溶媒に容易に溶解できる熱可塑性重合体を選択する
ことが好ましい。かかる観点から熱可塑性重合体として
はポリウレタン系重合体が好ましい。In the heat-resistant lagging sheet of the present invention, a thin film of a thermoplastic polymer is formed on one side of a non-woven fabric in order to increase the efficiency of lapping work. Here, the thermoplastic polymer must have a melting point of at least less than 200 ° C. If the melting point of the thermoplastic polymer constituting the thermoplastic film is 200 ° C. or higher, it is necessary to heat the tubular body to a temperature of 200 ° C. or higher during heat retention of the tubular body for high temperature and lapping of the heat insulating material. Cause a problem in the safety of. On the other hand, the melting point of the thermoplastic polymer is at least 50 ° C. in order to prevent sticking between the lagging sheets due to an increase in environmental temperature during lapping work or storage of the lagging sheets.
The above is preferable. Further, regarding the production of the lagging sheet, it is important that the thermoplastic polymer can form a film on the surface of the heat resistant nonwoven fabric, and for this reason, for example, it is preferable to select a thermoplastic polymer which can be easily dissolved in a solvent having a low boiling point. . From this viewpoint, a polyurethane polymer is preferable as the thermoplastic polymer.
【０００９】不織布の片面に皮膜を形成させるには熱可
塑性重合体溶液を噴霧または塗布する従来公知の方法が
利用できるが不織布を走行させながらオンラインで塗布
と溶媒の加熱除去が可能な方法が最も好ましい。いずれ
の方法を採用するにしても不織布シートの片面のみに皮
膜を形成させれば充分である。A conventionally known method of spraying or coating a thermoplastic polymer solution can be used to form a film on one side of a nonwoven fabric, but the method that allows online coating and solvent removal by heating while the nonwoven fabric is running is most preferred. preferable. Whichever method is adopted, it is sufficient to form a film on only one side of the nonwoven fabric sheet.
【００１０】ラギングシート中の熱可塑性重合体の混合
割合もラッピング作業性および保温・断熱性能の点から
重要である。その好ましい範囲は５〜２０重量％であ
り、より好ましくは１０から１５％である。繊維の混合
重量比率が５％未満ではラギングシートの管状体に対す
る粘着性が低くラッピング作業時にシートに弛緩を生じ
やすく作業効率が改善できない。一方、ラギングシート
中における熱可塑性重合体の混合割合が２０重量％を越
えると保温・断熱性能は相対的に低下する。The mixing ratio of the thermoplastic polymer in the lagging sheet is also important in terms of lapping workability and heat retention / heat insulation performance. The preferable range is 5 to 20% by weight, and more preferably 10 to 15%. When the mixed weight ratio of the fibers is less than 5%, the tackiness of the lagging sheet with respect to the tubular body is low and the sheet is apt to loosen during the lapping work, and the work efficiency cannot be improved. On the other hand, if the mixing ratio of the thermoplastic polymer in the lagging sheet exceeds 20% by weight, the heat retaining / insulating performance is relatively deteriorated.
【００１１】本発明にかかるその片面に低融点の熱可塑
性重合体皮膜を有する耐熱繊維積層体からなる不織布シ
ートは所定の大きさに裁断された後、テープ状に巻き上
げられて保温・断熱材として使用される。A non-woven fabric sheet comprising a heat-resistant fiber laminate having a low melting point thermoplastic polymer film on one side thereof according to the present invention is cut into a predetermined size and then wound up into a tape to serve as a heat insulating / heat insulating material. used.
【００１２】[0012]
【実施例】以下に本発明を実施例を挙げて説明するが勿
論本発明はこれらに限定されるものではない。尚、本発
明における捲縮数及び捲縮度は以下の測定法による。 捲縮数：単繊維のデニール当たり２ｍｇの荷重を掛けた
状態で繊維長を測定し、次いで該繊維長における捲縮の
山数を数え、該山数を１インチ当たりの数に換算して捲
縮数とした。 捲縮度：単繊維のデニール当たり２ｍｇの荷重を掛けた
状態で繊維長（Ｌ１）を測定し、次に単繊維のデニール
当たり５０ｍｇの荷重を掛けて同様に繊維長（Ｌ２）を
測定し、次式により捲縮度（％）をもとめた。 捲縮度（％）＝（Ｌ２−Ｌ１）×１００／Ｌ２EXAMPLES The present invention will be described below with reference to examples, but of course the present invention is not limited thereto. The number of crimps and the degree of crimps in the present invention are measured by the following measuring methods. Number of crimps: The fiber length is measured with a load of 2 mg applied per denier of single fiber, the number of crimp peaks in the fiber length is counted, and the number of peaks is converted into the number per inch to be wound. It was a fraction. Crimping degree: The fiber length (L1) was measured while applying a load of 2 mg per denier of the single fiber, and then the fiber length (L2) was similarly measured by applying a load of 50 mg per denier of the single fiber, The crimping degree (%) was obtained by the following formula. Crimping degree (%) = (L2-L1) × 100 / L2
【００１３】実施例１ ポリベンズオキサゾール系重合体のポリリン酸溶液から
乾湿式紡糸法で得た単糸繊度が１．５デニールで、繊維
長が４．１ｍｍ、捲縮数が１２．７コ／インチ、捲縮度
／捲縮数が１．０４の短繊維を目付け１３０ｇ／ｍ2 と
なる様に積層した。該積層物をニードルパンチ機により
針密度２５０本／ｃｍ2の条件で刺針処理を施し、厚さ
２．２ｍｍの不織布を得た。次いで該不織布の片面に熱
可塑性ポリウレタンのジメチルホルムアルデヒド（ＤＭ
Ｆ）溶液を常温で連続的に塗布した後、さらに２００℃
の雰囲気中で乾燥して溶媒を除去した。なお塗布する量
を０〜３０重量％の範囲で変更した。なお熱可塑性ポリ
ウレタンはポリプロピレングリコール〔商品名：サンニ
ックス、数分子量＝１０００、三洋化成（株）製〕と
１，４−ブタンジオールとＮ，Ｎ’−ジフェニルメタン
ジイソシアネート〔商品名：ミリオネートＭＴ、日本ポ
リウレタン（株）〕をジメチルホルムアルデヒドを溶媒
にして溶液重合で得たものである。このように片面の熱
可塑性ポリウレタン皮膜を形成させた不織布シートを巾
６０ｍｍのテープ状物に加工した。該テープ状物を１８
０℃に加熱された直径５０ｍｍの配管に該ポリウレタン
を塗布した側を内側にして巻き付けた。作業効率はラッ
ピング後のラギングシートのたるみ（弛緩）の程度を目
視で判定した。また該テープを巻き付けた配管に４００
℃の加熱蒸気を供給したときの表面温度で保温・断熱性
能を評価した。さらにこの温度の加熱蒸気を延べ８００
時間を供給した後のラギングシートの形態を目視で判定
した。Example 1 A single yarn fineness obtained by a dry-wet spinning method from a polyphosphoric acid solution of a polybenzoxazole polymer was 1.5 denier, a fiber length was 4.1 mm, and a crimp number was 12.7 co / Short fibers having an inch and a crimping degree / crimping number of 1.04 were laminated so as to have a basis weight of 130 g / m 2 . The laminate was subjected to needle stick treatment with a needle punch machine at a needle density of 250 needles / cm 2 to obtain a nonwoven fabric having a thickness of 2.2 mm. Then, on one side of the non-woven fabric, the thermoplastic polyurethane dimethylformaldehyde (DM
F) After continuously coating the solution at room temperature, then 200 ° C
The solvent was removed by drying in an atmosphere of. The coating amount was changed within the range of 0 to 30% by weight. The thermoplastic polyurethane is polypropylene glycol [trade name: Sannix, number molecular weight = 1000, Sanyo Kasei Co., Ltd.], 1,4-butanediol and N, N'-diphenylmethane diisocyanate [trade name: Millionate MT, Nippon Polyurethane]. Co., Ltd.] was obtained by solution polymerization using dimethylformaldehyde as a solvent. The non-woven fabric sheet having the thermoplastic polyurethane film formed on one side in this manner was processed into a tape-shaped product having a width of 60 mm. 18 the tape
A pipe having a diameter of 50 mm heated to 0 ° C. was wound so that the side coated with the polyurethane was inside. The work efficiency was determined by visually observing the degree of slack (loosening) of the lagging sheet after lapping. In addition, the pipe wrapped with the tape is 400
The heat retention / adiabatic performance was evaluated by the surface temperature when the heating steam of ℃ was supplied. Furthermore, heated steam at this temperature is 800 in total.
The morphology of the lagging sheet after the time was supplied was visually determined.
【００１４】[0014]
【表１】 [Table 1]
【００１５】第１表から明らかなように本発明に属する
実施例１はラッピング作業で配管に対する密着性は良好
でテープが弛緩は発生せず手直しを要せず作業性は良好
であった。また繊維の劣化および弛緩は認められなかっ
た。また表面温度もほぼ５０℃以下であった。As is clear from Table 1, in Example 1 which belongs to the present invention, the adhesion to the pipe was good in the lapping work, the tape did not loosen, no rework was required, and the workability was good. No deterioration or relaxation of the fiber was observed. The surface temperature was also about 50 ° C. or lower.
【００１６】＜比較例１＞ポリベンザゾール系繊維に代
えて全芳香族系ポリアミド繊維（商品名：ケブラー２
９）に変えた以外は実施例１に記載したと同一の方法で
ラギングシートを作成した。該テープを巻き付けた配管
に４００℃の加熱蒸気を延べで８００時間供給した後の
繊維の形態変化を調べた。結果を表２に示す。Comparative Example 1 A wholly aromatic polyamide fiber (trade name: Kevlar 2) was used instead of the polybenzazole fiber.
A lagging sheet was prepared by the same method as described in Example 1 except that the procedure was changed to 9). The morphological change of the fiber was investigated after the heated steam at 400 ° C. was supplied to the pipe wound with the tape for 800 hours in total. The results are shown in Table 2.
【００１７】[0017]
【表２】 [Table 2]
【００１８】本発明に属さない比較例１の表面温度は実
施例１に比べて配管に近接した部分で繊維劣化が認めら
れた。As for the surface temperature of Comparative Example 1 which does not belong to the present invention, fiber deterioration was recognized in the portion close to the pipe as compared with Example 1.
【００１９】＜比較例２＞捲縮数及び捲縮度を変更した
以外は実施例１と同法にてラギングシートを作成した。
結果を表３に示す。Comparative Example 2 A lagging sheet was prepared in the same manner as in Example 1 except that the number of crimps and the degree of crimp were changed.
The results are shown in Table 3.
【００２０】[0020]
【表３】 [Table 3]
【００２１】第３表に示すように捲縮数が本発明の範囲
から低い方に外れた場合（比較例２）、繊維相互間の絡
み合い数または／および強度が低いためカード通過性は
不良であった。なおこの不織布から成形したラギングシ
ートは嵩高性が不足し、保温・断熱効果は劣っていた。As shown in Table 3, when the number of crimps deviates from the range of the present invention to the lower side (Comparative Example 2), the number of entanglements between fibers and / or the strength is low, and the card passing property is poor. there were. The lagging sheet formed from this non-woven fabric lacked bulkiness and was inferior in heat insulation and heat insulation effects.
【００２２】[0022]
【発明の効果】本発明によると保温性・断熱性・耐熱性
と耐久性に優れたラギングシートを提供することを可能
にした。EFFECTS OF THE INVENTION According to the present invention, it is possible to provide a lagging sheet having excellent heat retention, heat insulation, heat resistance and durability.
Claims (1)
／インチ以上、捲縮度／捲縮数が０．７以上の有機合成
繊維からなる不織布の片面に２００℃未満の融点を有す
る熱可塑性重合体の薄膜が形成されてなる耐熱ラギング
シート。1. A melting point of less than 200 ° C. on one side of a nonwoven fabric composed of organic synthetic fibers having a decomposition temperature of 600 ° C. or more, a crimp number of 8 co / inch or more, and a crimping degree / crimping number of 0.7 or more. A heat-resistant lagging sheet formed by forming a thin film of a thermoplastic polymer thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP672793A JP3129559B2 (en) | 1993-01-19 | 1993-01-19 | Heat resistant lagging sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP672793A JP3129559B2 (en) | 1993-01-19 | 1993-01-19 | Heat resistant lagging sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06212547A true JPH06212547A (en) | 1994-08-02 |
| JP3129559B2 JP3129559B2 (en) | 2001-01-31 |
Family
ID=11646281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP672793A Expired - Fee Related JP3129559B2 (en) | 1993-01-19 | 1993-01-19 | Heat resistant lagging sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3129559B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017159658A (en) * | 2011-09-23 | 2017-09-14 | オルバニー インターナショナル コーポレイション | Drum lagging material |
-
1993
- 1993-01-19 JP JP672793A patent/JP3129559B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017159658A (en) * | 2011-09-23 | 2017-09-14 | オルバニー インターナショナル コーポレイション | Drum lagging material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3129559B2 (en) | 2001-01-31 |
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