JP2007210286A - Air-permeable buffering sheet for coating film waterproofing construction - Google Patents

Air-permeable buffering sheet for coating film waterproofing construction Download PDF

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JP2007210286A
JP2007210286A JP2006035008A JP2006035008A JP2007210286A JP 2007210286 A JP2007210286 A JP 2007210286A JP 2006035008 A JP2006035008 A JP 2006035008A JP 2006035008 A JP2006035008 A JP 2006035008A JP 2007210286 A JP2007210286 A JP 2007210286A
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layer
synthetic resin
resin film
coating film
film layer
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Shigeki Tanaka
茂樹 田中
Shigeru Kuriyama
茂 栗山
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Toyobo Co Ltd
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Toyobo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-permeable buffering sheet which shows a high waterproof performance on the whole waterproof surface by the air-permeable buffering sheet for coating film waterproofing construction and a coating film waterproofing constructing technique using the same, to which safety treatment for water leakage is given, and which has a stable air-permeable layer preventing swell and rise, achieves an excellent construction, enables resumption of the construction by only wiping the surface even if the surface is wet on rainfall, frost or the like, and does not necessitate an ageing sheet. <P>SOLUTION: The air-permeable buffering sheet used for the coating film waterproofing construction is a three or more-layered structural laminate made by integrating a 10 to 100 μm thick synthetic resin film layer [I], a 20 to 150 μm thick synthetic resin film layer [II] having a glass transition temperature of lower than 50°C, and a non-woven fabric layer [III] having a basis weight of 15 to 300 g/m<SP>2</SP>, wherein the non-woven fabric layer [III] functions as a degassing layer in the coating film waterproof layer, and the synthetic resin film layers [I] and/or [II] function as a water-shielding layer and have the function of reinforcing the coating film waterproof layer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、建築物の特に降雨や流水に曝される部位に防水施工を行う際に用いられる塗膜防水工事用下張り緩衝材に関する。   TECHNICAL FIELD The present invention relates to an underlayer cushioning material for waterproofing coating film used when waterproofing is performed on a part of a building that is exposed to rain or running water.

建塗膜防水工事は、築構造物の屋上や駐車場の床面等の防水施工方法として、アスファルト防水工事、シート防水工事とともに広く実施されるメンブレン防水工事の一つであるが、補修工事などの増大に伴い、下地からの水蒸気発生などによる塗膜防水層に所謂「フクレ」などのトラブル発生がするという問題があった。その対策として、塗膜防水層下に不織布、連通気泡プラスティック発泡体或いは、有溝プラスティックフォーム、有溝ゴムアスファルトシート等よりなる通気緩衝層を設け、発生する水蒸気などをこの通気緩衝層を通じて系外に排除し、その上に防水層を設ける、通気緩衝工法が開発され、建築学会においても該通気緩衝工法に対する信頼できる施工基準制定が行われ、JASS 8において(塗膜防水施工仕様L−USとして制定され)この工法の構成を
Type(a)片面熱融着有孔不織布
Type(b)不織布/プラスティック発泡体/不織布
Type(c)片面連通溝付き発泡体/不織布
を用い防水層施工方法が認定され、これらの工法に基づく補強材(不織布、ガラス繊維マット)を積層した防水工事が実施され、一応安定した工法として発展してきた。
Building coating waterproofing work is one of the membrane waterproofing work widely performed along with asphalt waterproofing work and sheet waterproofing work as a waterproofing work method for rooftops of construction structures and floors of parking lots. With such an increase, there has been a problem that troubles such as so-called “swelling” occur in the waterproof coating layer due to the generation of water vapor from the base. As a countermeasure, an air cushioning layer made of non-woven fabric, open cell plastic foam or grooved plastic foam, grooved rubber asphalt sheet, etc. is provided under the waterproof coating layer, and the generated water vapor etc. A ventilation cushioning method was developed, and a waterproof cushioning method was developed on top of it, and a reliable construction standard for the ventilation cushioning method was established at the Architectural Institute of Japan, and in JASS 8 (as a waterproof coating construction specification L-US) Established) Waterproof construction method using Type (a) Single-sided heat-sealed perforated nonwoven fabric Type (b) Non-woven fabric / plastic foam / nonwoven fabric Type (c) Foam with single-sided continuous groove / nonwoven fabric A waterproof construction was carried out by laminating reinforcing materials (nonwoven fabrics, glass fiber mats) based on these methods. It has been developed as.

しかしながら、これ等下張り緩衝材を用いて行なう工法は、従来の工法に比べ確かに下地より発生する水蒸気等を排出し「フクレ」などのトラブル発生を抑制し、又下地ムーブメントの防水層にかかる歪の大部分を通気緩衝層の剪断変形により吸収する緩衝作用を有する特徴を持つ優れたものがあり、その効果は認められるが、Type (a)の下張り緩衝材に於いては、用いることができる塗膜防水剤の粘度に制限があり、施工し易く、作業が容易な粘度が低い塗膜防水剤を用いた場合、塗膜防水剤が下張り緩衝材の通気層(脱気層)内にまで浸透し、通気層(脱気層)が目詰りして脱気機能を消失し、一方粘度が高ければ、融着(高密度化)層への塗膜防水剤の含浸が不良となり、塗膜防水剤層と下張り緩衝材層の接着が不良となり剥離抵抗が低下する等欠陥が生じるという問題点があった。このように、使用可能の塗膜防水剤が限定され、使用し難く、塗膜防水剤の主流を占めるウレタン塗膜防水剤(2液性)は、調合後施工が終了するまでに防水剤粘度が約2,000cps〜40,000cpsの範囲で大きく経時変化し増大するものであり、特に用いる塗膜防水剤の粘度に対する制約が、施工管理の困難性を増大させていた。   However, the construction method using these underlayer cushioning materials surely discharges water vapor etc. generated from the base compared with the conventional construction method, suppresses the occurrence of troubles such as “bulges” and the distortion applied to the waterproof layer of the base movement. There is an excellent material having a buffering function that absorbs most of it by shear deformation of the ventilation buffer layer, and the effect is recognized, but it can be used in the cushioning material of Type (a). When using a waterproofing film that has a limited viscosity and is easy to work with and has a low viscosity, the waterproofing film is in the ventilation layer (deaeration layer) of the underlayer cushioning material. Penetration and clogging of the ventilation layer (deaeration layer) causes loss of the deaeration function. On the other hand, if the viscosity is high, impregnation of the waterproof (densification) layer with the waterproofing agent film becomes poor, and the coating film Adhesion between the waterproofing agent layer and the underlayer cushioning material layer becomes poor and peel There was a problem that defects such as a decrease in resistance occurred. In this way, the usable waterproofing film waterproofing agent is limited and difficult to use, and the urethane waterproofing film waterproofing agent (two-component), which occupies the mainstream of the waterproofing film waterproofing agent, has a waterproofing agent viscosity by the end of construction after the preparation. In the range of about 2,000 cps to 40,000 cps, the viscosity of the coating waterproofing agent used particularly increases the difficulty of construction management.

一方、Type(b)やType(c)に於いては、発泡体層の剪断強さが充分でない為、この発泡体層内より破壊される危険性が拭い難い欠点がある。更に、Type(a)、Type(b)およびType(c)の下張り緩衝材に於いて共通して保持される欠陥は、もしその上部の防水膜層にピンホール程度の欠陥ほか如何なる欠陥が生じても、そこから侵入する水を通気緩衝層を通じて全面に導かれ、全面漏水を発生し兼ねない危険性を内包するものであり、通気緩衝層上に形成させる防水層の完全度、破壊抵抗の大きさが特に望まれるものである。   On the other hand, in Type (b) and Type (c), since the foam layer has insufficient shear strength, there is a drawback that it is difficult to wipe the risk of breaking from within the foam layer. Furthermore, the defects commonly held in the type (a), Type (b), and Type (c) underlayer cushioning materials are, if any, a defect such as a pinhole defect occurs in the upper waterproof film layer. However, the intrusion of water from the entire surface is conducted through the ventilation buffer layer, and there is a risk that water leakage may occur on the entire surface. Size is particularly desirable.

上記問題を解決するため、長繊維不織布層[I]と、合成樹脂フィルム層[II]と、不織布層[III]を積層一体化した通気緩衝シートが開示されている(例えば特許文献1参照)。しかしながら、かかる通気緩衝シートは、上記Type(a)〜Type(c)と同様に表層が不織布であるため、降雨や霜などよる水濡れがあると、表層の不織布に含有された水分が蒸発するまで工事を中断せざるを得ず、特に冬場等乾燥に時間を要する時期における工事遅延の問題は深刻であった。
特開平3−158555号公報
In order to solve the above problem, a breathable cushion sheet in which a long fiber nonwoven fabric layer [I], a synthetic resin film layer [II], and a nonwoven fabric layer [III] are laminated and integrated is disclosed (for example, see Patent Document 1). . However, since the ventilation buffer sheet has a non-woven surface layer as in the above Type (a) to Type (c), the water contained in the non-woven fabric of the surface layer evaporates when wet due to rain or frost. The construction delays were unavoidable, especially during the winter season when it took time to dry.
Japanese Patent Laid-Open No. 3-158555

本発明は、従来技術の課題を背景になされたもので、防水面全面にわたり高い防水性能を有し、漏水に対し安全措置を講じられ、かつ膨れや浮き上がり防止のための安定した通気層を有し、かつ優れた施工性を有する通気緩衝シートを提供することを課題とする。また、降雨や霜などよる水濡れがあっても、自然乾燥を待たずとも、表面をふき取るだけで工事を再開することが可能であり、養生シートなどが不要である通気緩衝シートを提供する。   The present invention has been made against the background of the problems of the prior art.It has a high waterproof performance over the entire waterproof surface, has safety measures against water leakage, and has a stable ventilation layer for preventing swelling and lifting. In addition, an object of the present invention is to provide a ventilation cushioning sheet having excellent workability. In addition, even if there is water wet due to rain or frost, it is possible to resume construction by simply wiping the surface without waiting for natural drying, and a ventilation cushioning sheet that does not require a curing sheet or the like is provided.

本発明者らは上記課題を解決するため、鋭意研究した結果、ついに本発明を完成するに至った。即ち、本発明は、(1)厚さ10〜100μmの合成樹脂フィルム層〔I〕と、ガラス転移温度が50℃より小さい樹脂よりなる目付20〜150μの合成樹脂フィルム層〔II〕と、目付15〜300g/m2の不織布層〔III〕が一体化された少なくとも三層以上からなる構造積層体からなることを特徴とする塗膜防水工事用通気緩衝シート、(2) 前記合成樹脂フィルム層[I]の最外層側にウレタン系樹脂及び/又はポリエステル系樹脂を含む印刷層を有することを特徴とする(1)記載の塗膜防水工事用通気緩衝シート、(3)前記フィルム層〔I〕が2種以上のポリエステル層からなることを特徴とする(1)又は(2)記載の塗膜防水工事用通気緩衝シート、(4)前記合成樹脂フィルム層〔I〕と長繊維不織布層〔III〕の間に合成樹脂フィルム層〔II〕が押し出しラミネート法により複合されたことを特徴とする(1)〜(3)いずれかに記載の塗膜防水工事用通気緩衝シート、(5)アルミ箔が内層あるいは外層に積層されていることを特徴とする(1)〜(4)いずれかに記載の塗膜防水工事用通気緩衝シート、(6)前記合成樹脂フィルム層〔I〕あるいは〔II〕の片面に導電性金属が蒸着されていることを特徴とする(1)〜(4)いずれかに記載の塗膜防水工事用通気緩衝シート、である。 As a result of intensive studies to solve the above problems, the present inventors have finally completed the present invention. That is, the present invention includes (1) a synthetic resin film layer [I] having a thickness of 10 to 100 μm, a synthetic resin film layer [II] having a basis weight of 20 to 150 μm made of a resin having a glass transition temperature lower than 50 ° C., and a basis weight. A breathable cushion sheet for waterproofing a coating film, characterized by comprising a structural laminate comprising at least three layers in which a nonwoven fabric layer [III] of 15 to 300 g / m 2 is integrated, (2) The synthetic resin film layer (1) The air-permeable cushion sheet for waterproofing a coating film according to (1), which has a printed layer containing a urethane resin and / or a polyester resin on the outermost layer side of [I], (3) the film layer [I ] Comprises two or more polyester layers, (1) or (2) the waterproof cushioned breathable cushion sheet, (4) the synthetic resin film layer [I] and the long fiber nonwoven fabric layer [ III] during synthesis The oil film layer [II] is composited by an extrusion laminating method, wherein the air-permeable cushion sheet for waterproofing a coating film according to any one of (1) to (3), (5) the aluminum foil is an inner layer or an outer layer (1) to (4) characterized in that they are laminated, and (6) conductive resin on one side of the synthetic resin film layer [I] or [II]. The ventilation cushion sheet for coating film waterproofing construction according to any one of (1) to (4), wherein a metal is deposited.

本発明の、塗膜防水工事用通気緩衝シートは、下記の優れた効果を有する。
(1)安定した防水性を有する複数のフィルム層と脱気性を有する不織布とが強固に複合された防水シートであるため、防水施工も容易であり実施時に強固な防水膜を形成出来る。
(2)また、不織布層[III]が安定した脱気性を有し、フクレなどによるトラブルがなく耐久性が高い防水層を形成できる。
(3)防水層が、多層フィルム層となった構造であるため、低粘度の塗膜防水材使用時にも下部通気緩衝層等へも塗膜防水剤が侵出流入する恐れがなく、2液性反応型防水剤のように粘度の経時変化が大きい塗膜防水剤でも調合直後の極低粘度時から安心して使用でき、又低粘度塗布実施は補強材への不含浸部発生抑止にも有効である。
(4)合成樹脂フィルム層[I]よりなるバリアー層は、不飽和ポリエステル塗膜防水剤やウレタン系塗膜防水剤のような他の構成素材との相互作用を受け易く、硬化反応が阻害されやすい材料の適用時においても、その影響を受けずに安心して使用出来る。
(5)通気緩衝層と複数の合成樹脂フィルムとを積層一体化させた構造により、現場で下地に本発明の通気緩衝シートを貼着し、その上から塗膜防水剤を塗布して防水層を形成せしめ、合成樹脂中塗り層を介してトップ防水層を形成せしめ、合成樹脂中塗り層を介してトップコート層を塗布することで、防水面全面にわたり一体の防水層を形成でき、漏水に対し安全措置を講じられ、トータルコストを削減し、材料代、工程費を削減できるものである。
(6)表層がフィルムであるため、天候や季節要因による工事中断期間を大幅に短縮することが可能となる。
(7)取り扱い性に優れた適正な嵩密度であることから施工性が向上する。
The air-permeable cushion sheet for waterproofing coating film of the present invention has the following excellent effects.
(1) Since it is a waterproof sheet in which a plurality of film layers having stable waterproof properties and a nonwoven fabric having degassing properties are firmly combined, waterproof construction is easy and a strong waterproof film can be formed during implementation.
(2) Moreover, the nonwoven fabric layer [III] has a stable degassing property, and can form a waterproof layer having high durability without any trouble due to swelling.
(3) Since the waterproof layer has a multilayer film layer structure, there is no risk that the waterproofing agent will invade into the lower ventilation buffer layer etc. even when using a low-viscosity coating waterproofing material. Even waterproof coatings with large changes in viscosity over time, such as water-resistant waterproofing agents, can be used with confidence from the very low viscosity immediately after preparation, and low-viscosity application is also effective in suppressing the occurrence of non-impregnated parts on the reinforcing material It is.
(4) The barrier layer made of the synthetic resin film layer [I] is susceptible to interaction with other constituent materials such as unsaturated polyester film waterproofing agent and urethane film waterproofing agent, and the curing reaction is inhibited. Even when easy-to-use materials are applied, they can be used with confidence without being affected by them.
(5) With a structure in which a ventilation buffer layer and a plurality of synthetic resin films are laminated and integrated, the ventilation buffer sheet of the present invention is pasted on the ground in the field, and a waterproofing layer is applied by applying a waterproof coating agent thereon. By forming the top waterproof layer through the synthetic resin intermediate coating layer and applying the top coat layer through the synthetic resin intermediate coating layer, an integral waterproof layer can be formed over the entire waterproof surface, preventing water leakage. Safety measures can be taken to reduce the total cost and material costs and process costs.
(6) Since the surface layer is a film, the construction interruption period due to weather and seasonal factors can be greatly shortened.
(7) Workability is improved because the bulk density is excellent in handleability.

以下、本発明について詳細に説明する。
本発明の通気緩衝シートは、厚さ10〜100μmの合成樹脂フィルム層[I]と、ガラス転移温度が50℃より小さい樹脂よりなる厚さ20〜150μmの合成樹脂フィルム層[II]と、目付15〜300g/m2の不織布層[III]が一体化された少なくとも三層以上からなる構造積層体からなることが好ましい。
The present invention will be described in detail below.
The ventilation buffer sheet of the present invention comprises a synthetic resin film layer [I] having a thickness of 10 to 100 μm, a synthetic resin film layer [II] having a glass transition temperature of less than 50 ° C. and a thickness of 20 to 150 μm, and a basis weight. It is preferable that it consists of a structural laminated body which consists of at least 3 layers in which 15-300 g / m < 2 > nonwoven fabric layer [III] was integrated.

表層を合成樹脂フィルム層(合成樹脂フィルム層[I])とすることにより、降雨や霜により付着した水分を容易に除去することが可能となり、また、下地に少々の凹凸があっても表面が平滑となるため、施工において熟練を要さず、かつ合成樹脂フィルム層[I]は合成樹脂フィルム層[II]を衝撃等から保護する役割も担う。更に合成樹脂フィルム層[I]自体が優れた防水性をするため、ウレタン防水剤の防水性能をシートの防水性能でサポートし、漏水に対する信頼性も向上する。   By making the surface layer a synthetic resin film layer (synthetic resin film layer [I]), it becomes possible to easily remove moisture adhering to rain or frost, and even if there are a few irregularities on the base, Since it becomes smooth, it does not require skill in construction, and the synthetic resin film layer [I] also serves to protect the synthetic resin film layer [II] from impacts and the like. Furthermore, since the synthetic resin film layer [I] itself has excellent waterproofness, the waterproof performance of the urethane waterproofing agent is supported by the waterproof performance of the sheet, and the reliability against water leakage is improved.

合成樹脂フィルム層[II]は、合成樹脂フィルム層[I]と不織布層間で剪断変形を緩衝する役割を担う。即ち、合成樹脂フィルム層[I]は硬く、一方、不織布層[III]は極めて柔軟であり、これらを張り合わせると、施工後に歩行等による剪断応力を受けた際剥離が生じ易いという問題点を本願発明者等が知見した。そして、ガラス転移温度が50℃より小さい樹脂からなる合成樹脂フィルム層[II]を間に挟むことにより合成樹脂フィルム層[I]と不織布層[III]との弾性率差を緩和し、剥離を防止することができることを見出した。また、合成樹脂フィルム層[II]は変形追従性に優れ、大変形を受けた場合、保護層としての役割を果たす合成樹脂フィルム層[I]が破壊されたとしても、合成樹脂フィルム層[II]は破断せずに、水分が下地に到達することを防止し、合成樹脂フィルム層[I]を補完する機能も発揮する。また、合成樹脂フィルム層[II]はガラス転移温度が−100℃以上の樹脂であることが取扱い性の観点から好ましい。
また、フィルムを2層とすることにより、皺やピンホール等の欠陥に対する安全性が向上する。
The synthetic resin film layer [II] plays a role of buffering shear deformation between the synthetic resin film layer [I] and the nonwoven fabric layer. That is, the synthetic resin film layer [I] is hard, while the non-woven fabric layer [III] is extremely flexible. When these are laminated, peeling is likely to occur when subjected to shear stress due to walking after construction. The present inventors have found out. And by sandwiching a synthetic resin film layer [II] made of a resin having a glass transition temperature of less than 50 ° C., the difference in elastic modulus between the synthetic resin film layer [I] and the non-woven fabric layer [III] is alleviated, and peeling is performed. It was found that it can be prevented. Further, the synthetic resin film layer [II] is excellent in deformation followability, and when subjected to large deformation, even if the synthetic resin film layer [I] serving as a protective layer is destroyed, the synthetic resin film layer [II] ] Prevents the moisture from reaching the base without breaking, and also exhibits a function of complementing the synthetic resin film layer [I]. The synthetic resin film layer [II] is preferably a resin having a glass transition temperature of −100 ° C. or higher from the viewpoint of handleability.
Moreover, the safety | security with respect to defects, such as a wrinkle and a pinhole, improves by making a film into two layers.

不織布層[III]は、通気層として機能するものであるが、不織布であるため、不織布特有のしなやかさで、下地への追従性を実現することができる。   The non-woven fabric layer [III] functions as an air-permeable layer, but since it is a non-woven fabric, it can realize the followability to the base with the flexibility that is unique to the non-woven fabric.

本発明の合成樹脂フィルム層[I]の素材としては、ポリエステル系フィルム、ポリアミド系フィルム、ポリプロピレンフィルム、ポリエチレンフィルムなどポリオレフィンフィルムなどや、それらの共重合体等ほか、その他エバール(EVOH)やエチレン・酢酸ビニル共重合体(EVA)などの汎用の合成樹脂フィルムの多くが使用出来るが、ウレタン系樹脂やポリエステル系樹脂などの塗膜防水材並びにその溶剤との相互作用(耐溶解性や接着性など)を考慮したとき、更には不織布−フィルム積層化プロセスの加工性、並びに施工時の取り扱い性を考慮したときには適度な剛性や強度を有することが好ましく、ポリエステル系フィルム、ポリアミド系フィルムあるいは、それらいずれかの共重合体フィルムの適用がより好ましく、次いでポリプロピレンフィルム、ポリエチレンフィルムなどのポリオレフィン系フィルムの適用が推奨できる。 Examples of the material of the synthetic resin film layer [I] of the present invention include polyester films, polyamide films, polypropylene films, polyolefin films such as polyethylene films, copolymers thereof, and other materials such as EVA (EVOH) and ethylene. Many general-purpose synthetic resin films such as vinyl acetate copolymer (EVA) can be used, but waterproof film such as urethane resin and polyester resin and their interaction with solvents (dissolution resistance, adhesion, etc.) ), And when considering the processability of the nonwoven fabric-film lamination process and the handling property during construction, it is preferable to have an appropriate rigidity and strength, such as a polyester film, a polyamide film, or any of them. Application of such copolymer film is more preferable, In polypropylene film, the application of polyolefin films such as polyethylene films can be recommended.

合成樹脂フィルム層[I]の厚みは10〜100μmの間にあることが好ましく、特に好ましくは40〜100μmの間であり、最も好ましくは50〜80μmの間である。フィルム層が厚いとシートに腰がでて取り扱いが容易であるが、あまり厚すぎると硬くなりすぎて下地層の凹凸への追随性及び施工後の歩行等によって受ける剪断変形追従性などが低下することがあり、好ましくない場合がある。 The thickness of the synthetic resin film layer [I] is preferably between 10 and 100 μm, particularly preferably between 40 and 100 μm, and most preferably between 50 and 80 μm. If the film layer is thick, the sheet will be stiff and easy to handle, but if it is too thick, it will become too hard and the followability to the unevenness of the underlayer and the followability of shear deformation due to walking after construction will decrease. Sometimes unfavorable.

合成樹脂フィルム層[I]の厚みの適正値は、上記範囲内で不織布層[III]の厚みにより変動し、厚み(すなわち同一製法では目付となる)が大きいほど、フィルムの適正厚みは厚くなる。不織布がニードルパンチ法により製造されている場合には、不織布目付の約1/5から1/2の目付量のフィルムを用いることが耐久性や施工性の観点から、経験的に特に好ましい。合成樹脂フィルム層[I]は、上述のとおり、通気緩衝シートに適度な剛性や機械特性の向上を実現するだけでなく、降雨や霜などよる水濡れがあっても表面をふき取るだけで工事を再開することが可能とし、通気緩衝層への水の浸透を防止する役割も果たすものである。従って、合成樹脂フィルム層[I]の表面は適度な撥水性を有することも好ましい形態のひとつである。 The appropriate value of the thickness of the synthetic resin film layer [I] varies depending on the thickness of the nonwoven fabric layer [III] within the above range, and the larger the thickness (that is, the basis weight in the same manufacturing method), the thicker the appropriate thickness of the film becomes. . When the nonwoven fabric is manufactured by the needle punch method, it is particularly empirically preferable to use a film having a basis weight of about 1/5 to 1/2 of the nonwoven fabric basis weight from the viewpoint of durability and workability. As mentioned above, the synthetic resin film layer [I] not only achieves an appropriate improvement in rigidity and mechanical properties of the ventilation cushioning sheet, but also works by simply wiping the surface even if it gets wet due to rain or frost. It can be resumed, and also serves to prevent water from penetrating into the ventilation buffer layer. Therefore, it is one of the preferable forms that the surface of the synthetic resin film layer [I] has an appropriate water repellency.

合成樹脂フィルム層[I]に印刷を行う場合は、印刷面となるフィルム層の表面が共重合ポリエステル系素材であることが好ましく、特に好ましい組み合わせのひとつとしては、ポリエチレンテレフタレートと共重合ポリエステル系樹脂の2層からなる複合フィルムである。共重合ポリエステル系樹脂は、分子骨格中にスルフォン基などの極性を有する官能基を有していることも、印刷材料との接着性の観点から特に好ましい。また、分子量が35000以下(好ましくは25000以下)の水酸基末端が多数存在する共重合ポリエステルであることも好ましい。あるいは、低分子量(35000以下、好ましくは25000以下)の結晶性共重合ポリエステルであることも好ましい形態のひとつで、共押し出し法などを用いて積層してもよい。あるいは、エマルジョン(環境問題の観点から好ましくは水系エマルジョン)をコーティング法などで付与しても良い。エマルジョンを用いる場合はウレタン系樹脂などと混合して用いることも好ましい形態のひとつである。 When printing on the synthetic resin film layer [I], the surface of the film layer to be the printing surface is preferably a copolymerized polyester material, and one particularly preferred combination is polyethylene terephthalate and a copolymerized polyester resin. It is the composite film which consists of these two layers. The copolyester resin preferably has a functional group having polarity such as sulfone group in the molecular skeleton from the viewpoint of adhesiveness with the printing material. Moreover, it is also preferable that it is a copolyester having a large number of hydroxyl terminals having a molecular weight of 35000 or less (preferably 25000 or less). Alternatively, a crystalline copolymer polyester having a low molecular weight (35000 or less, preferably 25000 or less) is also a preferred form, and may be laminated using a coextrusion method or the like. Alternatively, an emulsion (preferably an aqueous emulsion from the viewpoint of environmental problems) may be applied by a coating method or the like. In the case where an emulsion is used, it is also one of preferred forms to be mixed with a urethane resin or the like.

印刷を行う場合、柄は特に限定されるものではないが、印刷部又は非印刷部が横線、縦線、又は格子柄を形成するものであれば、作業者が施工し易いという利点がある。   When printing is performed, the pattern is not particularly limited. However, if the printing unit or the non-printing unit forms a horizontal line, a vertical line, or a lattice pattern, there is an advantage that an operator can easily perform the construction.

合成樹脂フィルム層[II]と貼りあわされる界面は接着力を高めるためにコロナ処理などを行っておくことも特に好ましい形態のひとつである。 It is one of the particularly preferred embodiments that the interface pasted with the synthetic resin film layer [II] is subjected to corona treatment or the like in order to enhance the adhesive force.

本発明の合成樹脂フィルム層[II]の素材としては、ポリエステル系フィルム、ポリアミド系フィルム、ポリプロピレンフィルム、ポリエチレンフィルムなどポリオレフィン系フィルムなどや、それらの共重合体等ほか、その他汎用の合成樹脂フィルムの多くが使用出来るが、接着対象の合成樹脂フィルム層[I]や通気緩衝層(不織布層[III])との接着性を考慮したとき、下地層との追随性を考慮したときには適度な柔軟性が必要となり、接着対象の合成樹脂フィルム層[I]より融点が低く、かつガラス転移温度が50℃より小さい樹脂よりなる合成樹脂フィルム層であることが好ましく、共重合ポリエステルフィルム、共重合ポリアミドフィルム、ポリエチレンフィルムなどのポリオレフィン系フィルムの適用が推奨できる。 Examples of the material of the synthetic resin film layer [II] of the present invention include polyester films, polyamide films, polypropylene films, polyolefin films such as polyethylene films, copolymers thereof, and other general-purpose synthetic resin films. Many can be used, but when considering the adhesion with the synthetic resin film layer [I] and the air cushioning layer (nonwoven fabric layer [III]) to be bonded, moderate flexibility when considering the followability with the underlayer Is preferably a synthetic resin film layer made of a resin having a lower melting point than that of the synthetic resin film layer [I] to be bonded and a glass transition temperature of less than 50 ° C. Application of polyolefin film such as polyethylene film is recommended.

合成樹脂フィルム層[II]の厚みは20〜150μmの間にあることが好ましく、特に好ましくは30〜100μm、最も好ましくは30〜80μmである。フィルム層が薄いとフィルムが破損したり、ピンホールが発生したりして、下地層からあがってきた水や水蒸気がフィルム層[I]と合成樹脂フィルム層[II]の界面に水が入って剥離する危険性がある。 The thickness of the synthetic resin film layer [II] is preferably between 20 and 150 μm, particularly preferably 30 to 100 μm, and most preferably 30 to 80 μm. If the film layer is thin, the film may be damaged or pinholes may occur, and water or water vapor from the base layer may enter the interface between the film layer [I] and the synthetic resin film layer [II]. There is a risk of peeling.

好ましい実施形態のひとつとして、合成樹脂フィルム層[II]が押し出しラミネート法で形成される場合には、共押し出しや2回ラミネートにより複数層が積層されたものであることも漏水防止対策として特に好ましい。押し出しラミネート法では、厚みが厚すぎると冷却の不良が起こりやすいためか皺が入るトラブルが多いので、50ミクロン以下の層を重ねてラミネートすることが好ましい。経験的には、合成樹脂フィルム層[II]の厚みが大きいほど、不織布層[III]との高い接着性を得ることが容易となる場合が多い。 As one preferred embodiment, when the synthetic resin film layer [II] is formed by an extrusion laminating method, it is particularly preferable as a measure for preventing water leakage that a plurality of layers are laminated by coextrusion or two-time lamination. . In the extrusion laminating method, if the thickness is too thick, there are many troubles in which flaws are likely to occur due to poor cooling, so that it is preferable to laminate the layers of 50 microns or less. Empirically, as the thickness of the synthetic resin film layer [II] is larger, it is often easier to obtain high adhesiveness with the nonwoven fabric layer [III].

不織布層[III]と合成樹脂フィルム層[I]あるいは[II]との複合化、あるいは合成樹脂フィルム層[I]と合成樹脂フィルム層[II]の複合化の最も望ましい積層一体化製造プロセスのひとつとして、押し出しラミネーションプロセスが挙げられる。即ち、押出しラミネーション設備に供給する不織布やフィルムの上に、溶融状態の合成樹脂フィルムを押し出して積層し、ロール間で圧着しフィルムや不織布が接合一体化した構成の防水層補強材を生産性よく製作することができる。必要により、押し出したフィルム層の上に合成樹脂フィルム層[I]を供給することに1プロセスで3層のラミネートが可能となる。尚、積層一体化法としては、押出しラミネーション法に限定するものではなく、接着剤や接着パウダーなどの使用も可能であり、コーティング法、ドライラミ法など汎用の何れの積層一体化法の適用も可能であるが、押出しラミネーション法の適用は不織布層−フィルム積層一体化時に単に不織布層−フィルム間を強固に接着一体化するのみならず、不織布−フィルム積層体製造時においては、不織布−フィルム境界層の不織布交点間が侵入したフィルムを構成する溶融ポリマーにより接着され、不織布−フィルム積層一体化と共に不織布の引張り強力、引張り弾性率等物性向上に寄与することができ、特に好ましい。押し出しラミネートされる不織布やフィルムの面は、コロナ処理などにより接着性が改善されていることが特に好ましい。 The most desirable laminated integrated manufacturing process of the composite of the nonwoven fabric layer [III] and the synthetic resin film layer [I] or [II], or the composite of the synthetic resin film layer [I] and the synthetic resin film layer [II] One is the extrusion lamination process. That is, a waterproof layer reinforcing material with a structure in which a synthetic resin film in a molten state is extruded and laminated on a nonwoven fabric or a film supplied to an extrusion lamination facility, and the film and the nonwoven fabric are joined and integrated with high productivity. Can be produced. If necessary, three layers can be laminated in one process by supplying the synthetic resin film layer [I] on the extruded film layer. Note that the lamination integration method is not limited to the extrusion lamination method, and adhesives and adhesive powders can be used, and any general lamination integration method such as coating method or dry lamination method can be applied. However, the application of the extrusion lamination method is not only to firmly bond and integrate the nonwoven fabric layer to the film at the time of the nonwoven fabric layer-film lamination integration, but also at the time of manufacturing the nonwoven fabric-film laminate, the nonwoven fabric-film boundary layer. It is particularly preferable because it can be bonded by a molten polymer constituting a film in which the intersections of the nonwoven fabrics penetrate, and contribute to improvement of physical properties such as tensile strength and tensile elastic modulus of the nonwoven fabric together with the nonwoven fabric-film lamination integration. It is particularly preferable that the surface of the nonwoven fabric or film to be extruded and laminated has improved adhesiveness by corona treatment or the like.

本発明の通気緩衝シートは、印刷層を有することが特に好ましい。これは、表裏面を明らかにするだけでなく、塗膜層との接着性を改善することができる。また、塗膜作業者が塗膜層の厚み斑を明確に見分けるためにも好ましく、青色などの濃色系の印刷であることも好ましい。印刷は全面に行われてもよいし、部分的に実施されてもよいが、ウレタン層と印刷下地層(フィルム層[I])との接着性を改善できる場合も多いので、全面印刷しておくことが特に好ましい。塗膜層としてウレタン系樹脂あるいはポリエステル系樹脂が用いられることが多いため、その接着性を高めるためにウレタン系樹脂あるいはポリエステル樹脂をベースとしたインキであることが好ましい。必要により、インキ中に硬化剤や架橋剤を添加することも好ましい形態のひとつである。また、印刷される合成樹脂フィルム層面がポリエステル系樹脂である場合は、水酸基末端とのメラミン架橋やイソシアネート架橋により強力な接着が可能となる。極性基を有した共重合ポリエステルや低融点ポリエステルあるいは低分子量ポリエステル(好ましくは分子量が30000以下)などは、接着性を良好とすることが可能である。 The ventilation cushioning sheet of the present invention particularly preferably has a printed layer. This not only reveals the front and back surfaces, but can also improve the adhesion with the coating layer. Moreover, it is also preferable for the coating film operator to clearly recognize the thickness unevenness of the coating film layer, and it is also preferable that the printing is a dark color system such as blue. Printing may be performed on the entire surface or may be performed partially. However, in many cases, the adhesion between the urethane layer and the printing foundation layer (film layer [I]) can be improved. It is particularly preferable to keep it. Since a urethane-based resin or a polyester-based resin is often used as the coating layer, an ink based on a urethane-based resin or a polyester resin is preferable in order to increase the adhesion. If necessary, adding a curing agent or a cross-linking agent to the ink is one of the preferred forms. Moreover, when the synthetic resin film layer surface to be printed is a polyester resin, strong adhesion is possible by melamine crosslinking or isocyanate crosslinking with the hydroxyl terminal. A copolyester having a polar group, a low melting point polyester, a low molecular weight polyester (preferably having a molecular weight of 30000 or less) and the like can have good adhesion.

合成樹脂フィルム層[I]および/または合成樹脂フィルム層[II]は塗布する塗膜防水剤成分や溶剤などの下部通気緩衝層へ向けての透過侵入を防止することが可能であり、如何なる低粘度の塗膜防水剤を塗布しても、該補強材下部に透過侵入することはなく、防水剤が均一に含浸・包含された均一・強靭な樹脂層を形成でき、防水層の補強効果が大きいのみならず、塗布防水剤による下部通気緩衝層の目詰め、通気緩衝層構成成分と、塗膜防水剤構成成分、或いは、その溶剤間の相互作用による障害発生が完全に防止できる特徴を有している。従って、2液性ウレタン塗膜防水剤や、不飽和ポリエステル塗膜防水剤のような、初期粘度が低く且つ粘度の経時変化が大きい反応性塗膜防水剤への適用は、特に効果的である。 The synthetic resin film layer [I] and / or the synthetic resin film layer [II] can prevent permeation and penetration of the waterproofing agent component or solvent to be applied to the lower ventilation buffer layer. Even if a waterproof coating agent with viscosity is applied, it does not penetrate into the lower part of the reinforcing material and can form a uniform and strong resin layer that is uniformly impregnated / included with the waterproofing agent. Not only is it large, it has features that can completely prevent the occurrence of troubles due to the clogging of the lower air-permeable buffer layer by the applied waterproofing agent, the components of the air-permeable buffer layer and the components of the waterproofing film coating agent, or the interaction between the solvents. is doing. Therefore, the application to a reactive coating waterproofing agent having a low initial viscosity and a large change with time, such as a two-component urethane waterproofing agent and an unsaturated polyester coating waterproofing agent, is particularly effective. .

不織布層[III]の特に好ましい例として、合成繊維不織布やガラス繊維不織布が推奨できる。更に、合成繊維不織布としては長繊維不織布や短繊維不織布のどちらを用いても良いし、長繊維不織布と短繊維不織布の複合品でもよい。特に好ましくは圧縮による厚みの減少が少なく、強度が高く耐摩耗性にすぐれた長繊維不織布を主体としていることが望ましい。ニードルパンチ法、または流体交絡法により交絡されたものが特に好ましいが、必要により熱融着処理や接着剤処理を行ってもよい。素材は、天然繊維であっても合成繊維であっても良い。特にポリエステルスパンボンド不織布、ポリアミドスパンボンド不織布、ポリプロピレンスパンボンド不織布や、トウ開繊法によるポリエステルス長繊維不織布やポリビニールアルコール(ビニロン)長繊維不織布が、代表的例として推奨できる。アクリル系繊維などを用いることもまた好ましい。又、ガラス繊維織物などとの複合も補強層として好適である。 As a particularly preferable example of the nonwoven fabric layer [III], a synthetic fiber nonwoven fabric or a glass fiber nonwoven fabric can be recommended. Further, as the synthetic fiber nonwoven fabric, either a long fiber nonwoven fabric or a short fiber nonwoven fabric may be used, or a composite product of a long fiber nonwoven fabric and a short fiber nonwoven fabric may be used. In particular, it is desirable that the main component is a long-fiber non-woven fabric having a small reduction in thickness due to compression, high strength, and excellent wear resistance. Those entangled by the needle punch method or the fluid entanglement method are particularly preferable, but if necessary, heat fusion treatment or adhesive treatment may be performed. The material may be natural fiber or synthetic fiber. As typical examples, polyester spunbond nonwoven fabric, polyamide spunbond nonwoven fabric, polypropylene spunbond nonwoven fabric, polyester fiber long fiber nonwoven fabric and polyvinyl alcohol (vinylon) long fiber nonwoven fabric by the toe opening method can be recommended as typical examples. It is also preferable to use acrylic fiber or the like. A composite with a glass fiber fabric or the like is also suitable as the reinforcing layer.

また、不織布層[III]は目付けが15〜300g/m2である事が好ましく、150〜250g/m2であることがより好ましい。目付けが15g/m2より小さいと所望の通気性や脱気性を得ることが難しくなる。目付けが300g/m2より大きくても大きな問題はないが、重量が重くなりすぎて取り扱い性が低下や不織布の界面剥離の可能性があり注意が必要である。不織布層[III]の重量基準の見かけの充填密度は、嵩高性の観点から0.005〜0.3g/cm3の間にあることが好ましい。充填密度が小さすぎると形態安定性が悪くなりあまり好ましくない。充填密度が0.3g/cm3より大きくなると通気性は悪くなる方向にあり本発明の目的を満足することが難しくなる。環境問題の観点からリサイクル不織布である反毛などを用いることも可能である。 Further, the nonwoven fabric layer [III], it is preferred basis weight is 15~300g / m 2, and more preferably 150 to 250 g / m 2. If the basis weight is less than 15 g / m 2, it is difficult to obtain desired air permeability and deaeration. Even if the basis weight is larger than 300 g / m 2, there is no serious problem, but the weight becomes too heavy, and the handleability may be lowered and the nonwoven fabric may be peeled off at the interface. The apparent packing density based on the weight of the nonwoven fabric layer [III] is preferably between 0.005 and 0.3 g / cm 3 from the viewpoint of bulkiness. When the packing density is too small, the form stability is deteriorated, which is not preferable. When the packing density is higher than 0.3 g / cm 3 , the air permeability tends to deteriorate and it becomes difficult to satisfy the object of the present invention. From the viewpoint of environmental problems, it is also possible to use reclaimed hair that is a recycled nonwoven fabric.

不織布層[III]はフィルム層の補強層や脱気層として用いられるが、より細い繊維をより多く含むほど通気(脱気)性能が上がり好ましい。繊維径は25ミクロン以下が好ましく、特に好ましくは、10〜18ミクロンの間であり、最も好ましくは14〜18ミクロンの間である。繊維径が細すぎると荷重による厚みのへたりを生じる場合があり注意が必要である。   The non-woven fabric layer [III] is used as a reinforcing layer or deaeration layer of the film layer. The more the thinner fibers are contained, the better the ventilation (deaeration) performance is increased. The fiber diameter is preferably 25 microns or less, particularly preferably between 10 and 18 microns, and most preferably between 14 and 18 microns. If the fiber diameter is too small, it may cause a thickness sag due to the load.

不織布層[III]は難燃タイプの物も好ましい。ハロゲンを含まない、リン系の難燃剤を塗布あるいは難燃成分の共重合ポリマーを用いることが好ましい。他のフィルムなどの成分が多少燃えやすい傾向であっても、不織布層の難燃性が高いと複合体全体の難燃性を良くする事ができる。   The non-woven fabric layer [III] is also preferably a flame retardant type. It is preferable to apply a phosphorus-based flame retardant containing no halogen or use a copolymer of a flame retardant component. Even if the components such as other films tend to be somewhat flammable, if the non-woven fabric layer has high flame retardancy, the overall flame retardance of the composite can be improved.

本発明において、断熱性を向上させるために、合成樹脂フィルム層[I]及び/又は合成樹脂フィルム層[II]をアルミニウム等の導電性金属を蒸着したフィルム層を用いたり、アルミ箔を複合したりすることも好ましい形態のひとつである。その場合の蒸着層の厚みは、50オングストローム以上であることが好ましく、特に好ましくは100オングストローム以上である。好ましい。また、静電容量などを測定することでピンホールの存在などを検知することも可能となる。   In the present invention, in order to improve heat insulation, the synthetic resin film layer [I] and / or the synthetic resin film layer [II] may be a film layer on which a conductive metal such as aluminum is deposited, or an aluminum foil may be combined. It is also a preferred form. In this case, the thickness of the deposited layer is preferably 50 angstroms or more, particularly preferably 100 angstroms or more. preferable. It is also possible to detect the presence of pinholes by measuring capacitance and the like.

以下の実施例において、本発明の内容を更に具体的に説明する。 The contents of the present invention will be described more specifically in the following examples.

(実施例1)
幅2.1m、目付け20g/m2のポリエチレンテレフタレート(ガラス転移温度70℃)製フィルムを、押出しラミネーション装置に供給し、その上に結晶性共重合ポリエステル(分子量25000、ガラス転移温度19℃)をフィルム厚み15μとなるように約2m幅で押し出した。その表面にウレタン系インキにより印刷を行い、フィルム層[I]とした。さらに、押出しラミネーション装置により、該フィルム層[I]の非印刷面側と4デーニルの目付160g/m2のポリエチレンテレフタレート長繊維不織布を共重合ポリエステル(ガラス転移温度45℃)によりサンドラミネートして積層し、ロール間で圧着して後、その中央部でセンターカットした。
Example 1
A film made of polyethylene terephthalate (glass transition temperature 70 ° C.) having a width of 2.1 m and a basis weight of 20 g / m 2 is supplied to an extrusion lamination apparatus, and a crystalline copolyester (molecular weight 25000, glass transition temperature 19 ° C.) is provided thereon. The film was extruded with a width of about 2 m so as to have a film thickness of 15 μm. The surface was printed with urethane ink to form a film layer [I]. Further, the non-printed side of the film layer [I] and a polyethylene terephthalate long fiber nonwoven fabric having a 4-denyl basis weight of 160 g / m 2 are laminated by sand lamination with a copolyester (glass transition temperature of 45 ° C.) using an extrusion lamination apparatus. And after crimping | bonding between rolls, the center cut was carried out in the center part.

コンクリート層等からなる下地に接着剤(ノガワケミカル(株)製、商品名DU488B)を0.4kg/m2塗布し、次いで先に製作した通気緩衝シートを不織布層[III]が接着面になるように貼り付け、その上から汎用の平場用ウレタン系防水剤1kg/mを2度塗布し、次いで紫外線吸収剤などを配合したトップコート用ウレタン系防水剤0.3kg/m2を塗布し、防水層を形成させた。施工後1ヶ月後に調査したところ防水のふくれや浮き上がりも無く、強靭で破断抵抗の大きな防水層を形成していることが判った。その後1年間調査を実施したが異常なく良好な状態が保たれていた。 0.4 kg / m 2 of adhesive (trade name DU488B, manufactured by Nogawa Chemical Co., Ltd.) is applied to the base made of a concrete layer, etc., and then the non-woven fabric layer [III] becomes the adhesive surface of the previously produced ventilation cushioning sheet paste manner, the above generic Hiraba urethane-based waterproofing agent 1 kg / m 2 ° coating, then a topcoat urethane-based waterproofing agent 0.3 kg / m 2 obtained by blending an ultraviolet absorber is applied, A waterproof layer was formed. An investigation was conducted one month after the construction, and it was found that there was no waterproof blistering or lifting, and a strong waterproof layer with a high breaking resistance was formed. After that, a survey was conducted for one year, but it was kept in good condition without any abnormalities.

(実施例2)
実施例1の不織布層[III]を、4デーニルの目付け250g/m2、幅2.11mのポリエステルスパンボンド不織布に変更し、又合成樹脂フィルム層[III]の材質をポリエチレンテレフタレートから、ナイロン6に変更し、かつ結晶性共重合ポリエステルを押し出しラミネートする代わりに、水分散エマルジョンタイプのポリエステル樹脂(分子量15000、ガラス転移温度65℃)にイソシアネート系架橋材を適切量配合したものを約5ミクロン片面コーティングして、その面にウレタン系インキにより印刷した以外は、他は全く同様にして作製した。ウレタン防水層も実施例1と同様にして形成したがふくれなどの剥離の問題もなく、強靭で破断抵抗の大きな防水層を形成していることが判った。
(Example 2)
The nonwoven fabric layer [III] of Example 1 was changed to a polyester spunbonded nonwoven fabric having a 4-denyl basis weight of 250 g / m 2 and a width of 2.11 m, and the material of the synthetic resin film layer [III] was changed from polyethylene terephthalate to nylon 6 Instead of extruding and laminating the crystalline copolyester, a water dispersion emulsion type polyester resin (molecular weight: 15000, glass transition temperature: 65 ° C.) with an appropriate amount of an isocyanate cross-linking material blended in about 5 microns on one side Except for coating and printing with urethane ink on the surface, the others were produced in exactly the same manner. The urethane waterproof layer was also formed in the same manner as in Example 1, but it was found that there was no problem of peeling such as blistering, and a strong waterproof layer having a high breaking resistance was formed.

(比較例1)
実施例1の塗膜防水工事用通気緩衝シートにおける合成樹脂フィルム層[I]を用いないで2層のシートを作成し、他は実施例1と全く同様にして防水層を形成させた。施工時に部所により不均一な厚みとなった。施工後1ヶ月後に調査したところ防水層のふくれがでており、防水層が剥離していることが判った。
(Comparative Example 1)
A two-layer sheet was prepared without using the synthetic resin film layer [I] in the air-permeable cushion sheet for waterproofing construction of the coating film of Example 1, and a waterproof layer was formed in exactly the same manner as in Example 1. The thickness became non-uniform depending on the location during construction. A survey one month after the construction revealed that the waterproof layer was blistered and the waterproof layer was peeled off.

(比較例2)
実施例1の通気緩衝シートにおいて、合成樹脂フィルム層[II]のガラス転移温度が52度のポリブチレンテレフタレート系樹脂とした。この通気緩衝シートを用い、他は、全く同様に防水層の施工を行って防水層を形成させた。防水膜及び防水層は、実施例と同様の優秀な性能を示し、強靭で破断抵抗の大きな防水層を形成していることが判ったが、シートが硬すぎて施工時に折れジワを生じる場合があり、下地層が平滑でない場合には、シートの折れ曲がり筋を生じて好ましいものでなかった。施工後1ヶ月後に調査したところ防水層のふくれはないが、部分的に合成樹脂フィルム層[I]と合成樹脂フィルム層[II]の間で剥離していることが判り問題であった。両フィルムは同じポリエステル系であることから接着性が良いと考えられたが、双方とも硬いために、折れ曲がりなどにより剥離が生じたものと推定された。
(Comparative Example 2)
In the ventilation buffer sheet of Example 1, a polybutylene terephthalate resin having a glass transition temperature of 52 degrees in the synthetic resin film layer [II] was used. Using this ventilation cushioning sheet, a waterproof layer was formed by applying a waterproof layer in exactly the same manner. The waterproof membrane and waterproof layer showed excellent performance similar to that of the example, and it was found that a waterproof layer having a strong and high resistance to breakage was formed. However, the sheet is too hard and may be wrinkled during construction. In addition, when the underlayer was not smooth, the sheet was bent, which was not preferable. When one month after the construction was investigated, there was no blistering of the waterproof layer, but it was found that it was partially peeled between the synthetic resin film layer [I] and the synthetic resin film layer [II]. Although both films were considered to have good adhesiveness because they were the same polyester type, it was presumed that peeling occurred due to bending or the like because both films were hard.

本発明の、塗膜防水工事用通気緩衝シートは、「フクレ」防止性、遮水性が高く、取り扱い性に優れ、更に、表層の水切れ性に優れるため、降雨・霜によって水分が付着しても容易に除去可能であり、工事中断期間を大幅に短縮することができるものであり、産業界に寄与すること大である。   The air-permeable cushion sheet for waterproofing coating film of the present invention has a high anti-dandruff property, high water-blocking property, excellent handleability, and excellent water drainage on the surface layer. It can be easily removed and the construction interruption period can be greatly shortened, which contributes to the industry.

Claims (6)

厚さ10〜100μmの合成樹脂フィルム層[I]と、ガラス転移温度が50℃より小さい樹脂よりなる厚さ20〜150μmの合成樹脂フィルム層[II]と、目付15〜300g/m2の不織布層[III]が一体化された少なくとも三層以上からなる構造積層体からなることを特徴とする塗膜防水工事用通気緩衝シート。 A synthetic resin film layer [I] having a thickness of 10 to 100 μm, a synthetic resin film layer [II] having a glass transition temperature of less than 50 ° C. and a thickness of 20 to 150 μm, and a nonwoven fabric having a basis weight of 15 to 300 g / m 2 A breathable cushion sheet for waterproofing a coating film, comprising a structural laminate composed of at least three layers in which layers [III] are integrated. 前記合成樹脂フィルム層[I]の最外層側にウレタン系樹脂及び/又はポリエステル系樹脂を含む印刷層を有することを特徴とする請求項1記載の塗膜防水工事用通気緩衝シート。   The breathable cushion sheet for coating film waterproofing work according to claim 1, further comprising a printed layer containing a urethane resin and / or a polyester resin on the outermost layer side of the synthetic resin film layer [I]. 前記フィルム層[I]が2種以上のポリエステル層からなることを特徴とする請求項1又は2記載の塗膜防水工事用通気緩衝シート。 The film layer [I] is composed of two or more polyester layers, and the air-permeable cushion sheet for waterproofing a coating film according to claim 1 or 2. 前記合成樹脂フィルム層[I]と長繊維不織布層[III]の間に合成樹脂フィルム層[II]が押し出しラミネート法により複合されたことを特徴とする請求項1〜3いずれかに記載の塗膜防水工事用通気緩衝シート。 The coating according to any one of claims 1 to 3, wherein the synthetic resin film layer [II] is combined by an extrusion laminating method between the synthetic resin film layer [I] and the long-fiber nonwoven fabric layer [III]. Ventilation cushioning sheet for waterproofing construction. アルミ箔が内層あるいは外層に積層されていることを特徴とする請求項1〜4いずれかに記載の塗膜防水工事用通気緩衝シート。 The ventilation cushion sheet for coating film waterproofing work according to any one of claims 1 to 4, wherein an aluminum foil is laminated on an inner layer or an outer layer. 前記合成樹脂フィルム層〔I〕あるいは〔II〕の片面に導電性金属が蒸着されていることを特徴とする請求項1〜4いずれかに記載の塗膜防水工事用通気緩衝シート。 The air-permeable buffer sheet for waterproofing a coating film according to any one of claims 1 to 4, wherein a conductive metal is deposited on one surface of the synthetic resin film layer [I] or [II].
JP2006035008A 2006-02-13 2006-02-13 Air-permeable buffering sheet for coating film waterproofing construction Pending JP2007210286A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014098291A (en) * 2012-11-16 2014-05-29 Aica Kogyo Co Ltd Waterproof finish structure and waterproof finish method
CN105711212A (en) * 2016-01-29 2016-06-29 河北金柳化纤有限公司 Root-puncture-resistant waterproof roll and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014098291A (en) * 2012-11-16 2014-05-29 Aica Kogyo Co Ltd Waterproof finish structure and waterproof finish method
CN105711212A (en) * 2016-01-29 2016-06-29 河北金柳化纤有限公司 Root-puncture-resistant waterproof roll and preparation method thereof

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