JPH02208334A - Sheet for preventing moisture condensation - Google Patents
Sheet for preventing moisture condensationInfo
- Publication number
- JPH02208334A JPH02208334A JP2948789A JP2948789A JPH02208334A JP H02208334 A JPH02208334 A JP H02208334A JP 2948789 A JP2948789 A JP 2948789A JP 2948789 A JP2948789 A JP 2948789A JP H02208334 A JPH02208334 A JP H02208334A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- water
- resin
- absorption rate
- water absorption
- 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
- 238000009833 condensation Methods 0.000 title claims abstract description 26
- 230000005494 condensation Effects 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000010521 absorption reaction Methods 0.000 claims abstract description 30
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 230000002265 prevention Effects 0.000 claims description 21
- 239000010419 fine particle Substances 0.000 claims description 20
- 239000000377 silicon dioxide Substances 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 239000000835 fiber Substances 0.000 abstract description 21
- 239000005011 phenolic resin Substances 0.000 abstract description 19
- 229920001568 phenolic resin Polymers 0.000 abstract description 14
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 abstract description 11
- 239000002131 composite material Substances 0.000 abstract description 7
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 6
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 5
- -1 polyethylene terephthalate Polymers 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 26
- 239000011347 resin Substances 0.000 description 26
- 239000006185 dispersion Substances 0.000 description 13
- 238000005452 bending Methods 0.000 description 9
- 229920001187 thermosetting polymer Polymers 0.000 description 8
- 230000007423 decrease Effects 0.000 description 7
- 239000004745 nonwoven fabric Substances 0.000 description 7
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000002612 dispersion medium Substances 0.000 description 6
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 101100313164 Caenorhabditis elegans sea-1 gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、吸水性に優れた結露防止用シートに関するも
のである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dew condensation prevention sheet with excellent water absorption.
（従来の技術）
従来、結露防止用シートとしては、防水帆布と不織布と
を接着したシート防水帆布と綿帆布とを接着したシート
又は防水帆布に吸水性樹脂例えば酢酸ビニル・アクリル
酸エステル共重合体ケン化物、デンプン・アクリロニト
リル重合体ケン化物、カルボキシメチルセルロース架橋
物等をコートした吸水性樹脂シート等が知られている。(Prior art) Conventionally, condensation prevention sheets have been made by bonding a waterproof canvas and a nonwoven fabric, a sheet bonding a waterproof canvas and a cotton canvas, or a waterproof canvas and a water-absorbing resin such as a vinyl acetate/acrylic acid ester copolymer. Water-absorbing resin sheets coated with saponified products, saponified starch/acrylonitrile polymers, crosslinked carboxymethyl cellulose, etc. are known.
（発明が解決しようとする課題）
しかし、防水帆布と不織布とを接着したシート又は防水
帆布と綿帆布とを接着したシートは、吸水性が低（、十
分な結露防止効果を有するものではなかった。また、吸
水性樹脂シートも必ずしも吸水性が十分ではなく、さら
に表面がヌルヌルし易いものであり、しかも膨潤し易い
等の問題があった。(Problem to be solved by the invention) However, sheets made by bonding waterproof canvas and nonwoven fabric or sheets made by bonding waterproof canvas and cotton canvas have low water absorption (and do not have sufficient dew condensation prevention effects). Furthermore, the water-absorbing resin sheet does not necessarily have sufficient water-absorbing properties, and furthermore, the surface tends to become slippery, and furthermore, there are problems in that it easily swells.
本発明は、このような問題点を解決するものであって、
その目的は、吸水性に優れ、良好な接触感を有し、しか
も膨潤による寸法変化が少ない結露防止用シートを提供
することにある。The present invention solves these problems, and
The purpose is to provide a dew condensation prevention sheet that has excellent water absorption, has a good contact feel, and has little dimensional change due to swelling.
（課題を解決するための手段）
本発明者らは、このような問題点を解決するために鋭意
研究の結果１強化繊維とバインター樹脂からなり、特定
の強化繊維を含有した多孔性複合シートによって上記目
的が達成されることを見出し１本発明に到達した。(Means for Solving the Problems) In order to solve these problems, the present inventors have conducted extensive research and have developed a porous composite sheet made of reinforcing fibers and binder resin and containing specific reinforcing fibers. The inventors have found that the above object can be achieved and have arrived at the present invention.
すなわち１本発明は３強化繊維と硬化したバインダーと
が一体化し、かつシリカ系微粒子を含有するシートであ
って、シートの一方の面から他の面に貫通した多数の連
続気孔を有し、吸水速度が３（ｂｍ／１０秒以上、吸水
率が６０重量％以上であることを特徴とする結露防止用
シートを要旨とするものである。That is, 1. The present invention is a sheet in which 3 reinforcing fibers and a hardened binder are integrated and contains silica-based fine particles, which has a large number of continuous pores penetrating from one surface of the sheet to the other surface, and which absorbs water. The gist of the invention is a dew condensation prevention sheet characterized by a speed of 3 (bm/10 seconds or more) and a water absorption rate of 60% by weight or more.
以下１本発明の詳細な説明する。Hereinafter, one aspect of the present invention will be explained in detail.
まず２本発明における結露防止用シートは９強化繊維と
バインターとからなり２強化繊維と硬化したバインター
とが一体化している複合シートからなるものである。First, the dew condensation prevention sheet in the present invention is a composite sheet in which the reinforcing fibers and the hardened binder are integrated.
ここで１強化繊維としては、ポリエステル繊維ポリアミ
ド繊維、ポリオレフィン繊維等の有機高分子からなる合
成繊維、ガラス繊維、炭素繊維等の無機繊維等が挙げら
れる。これらの形態は、長繊維又は短繊維からなる不織
布、！ｔｌｉ物１編物等シート状の形態を有するもので
あればいずれでもよい。これら強化繊維のうち、ポリエ
ステル繊維。Examples of the reinforcing fibers include synthetic fibers made of organic polymers such as polyester fibers, polyamide fibers, and polyolefin fibers, and inorganic fibers such as glass fibers and carbon fibers. These forms are nonwoven fabrics made of long or short fibers. Any material having a sheet-like form such as a tli material or a knitted material may be used. Among these reinforcing fibers, polyester fibers.
特にポリエチレンテレフタレート繊維が好ましく。Particularly preferred is polyethylene terephthalate fiber.
その形態は長繊維の不織布が好ましい。上記繊維シート
の繊維密度すなわち目付の好ましい範囲は繊維の種類、
形態等によって異なるが、ポリエチレンテレフタレート
繊維の長繊維不織布の場合は。Its form is preferably a long fiber nonwoven fabric. The preferable range of the fiber density, that is, the basis weight of the above-mentioned fiber sheet is the type of fiber,
It varies depending on the form, etc., but in the case of long fiber nonwoven fabrics made of polyethylene terephthalate fibers.
繊維密度が１００〜Ｔｏｏ ｇ ／ ｍ程度のものが好
ましい。Preferably, the fiber density is about 100 to Too g/m.
い。強化繊維である繊維シートの繊維密度があまり大き
すぎると、後述するフェノール樹脂等の含浸に当たり、
シート内部まで樹脂を含浸させることが困難になること
があり、一方、繊維シートの繊維密度があまり小さずぎ
ると、複合シートの曲げ強度等の力学的強力が低下し易
くなる。stomach. If the fiber density of the fiber sheet, which is a reinforcing fiber, is too high, it will be difficult to impregnate it with phenolic resin, etc., which will be described later.
It may be difficult to impregnate the inside of the sheet with the resin. On the other hand, if the fiber density of the fiber sheet is too small, the mechanical strength such as the bending strength of the composite sheet tends to decrease.
また２本発明におけるバインターとし、では、融点又は
軟化点が１５０℃以下の熱硬化性樹脂、あるいは熱可塑
性樹脂が好ましく用いられる。これらの樹脂の形態は、
粉末状、繊維状等の形態で用いられる。これらのうち、
特に好ましいバインターとしては親水性を有する点など
かちしてフェノール樹脂が挙げられる。フェノール樹脂
としては、フェノール類とアルデヒド類とを反応して得
られる熱硬化性のフェノール・アルデヒド樹脂、フェノ
ール類とアルデヒド類と含窒素化合物とを反応して得ら
れる熱硬化性の含窒素フェノール・アルデヒド樹脂等が
挙げられる。特に、好ましいフェノール樹脂としては熱
流動性が日本工業規格ＪＩＳＫ ６９１１１９７９の
５．３．２ ［成形材料（円板式流れ）〕に基づく樹脂
の伸びが３〜１５ ｃｍの熱硬化性フェノール樹脂であ
る。Further, as the binder in the present invention, a thermosetting resin or a thermoplastic resin having a melting point or softening point of 150° C. or lower is preferably used. The forms of these resins are
It is used in powdered, fibrous, etc. forms. Of these,
Particularly preferred binders include phenolic resins because of their hydrophilic properties. Phenol resins include thermosetting phenol/aldehyde resins obtained by reacting phenols and aldehydes, and thermosetting nitrogen-containing phenol/aldehyde resins obtained by reacting phenols, aldehydes, and nitrogen-containing compounds. Examples include aldehyde resins. Particularly preferred phenolic resins are thermosetting phenolic resins having thermofluidity and resin elongation of 3 to 15 cm based on 5.3.2 [Molding materials (disc type flow)] of Japanese Industrial Standards JISK 69111979.
次に１本発明においては、シリカ系微粒子を含有するも
のである。ここで、シリカ系微粒子としては、無水珪酸
又は含水珪酸の微粒子等が挙げられる。シリカ系微粒子
の粒径は１μｍ以下が好ましい。粒径があまり大きいシ
リカ系微粒子を用いると２斑が生じたり、結合力が弱く
なって十分な含有量を保持することができなくなること
があり。Next, in the present invention, silica-based fine particles are contained. Here, examples of the silica-based fine particles include fine particles of anhydrous silicic acid or hydrous silicic acid. The particle size of the silica-based fine particles is preferably 1 μm or less. If silica-based fine particles with too large a particle size are used, two spots may occur or the binding force may become weak, making it impossible to retain sufficient content.
また３吸水速度及び吸水率が低下する傾向がある。In addition, there is a tendency for the water absorption rate and water absorption rate to decrease.
シリカ系微粒子の含有量は、シートの重量当たり、 ０
．０１〜１５重量％が好ましく、特に好ましくは０．１
〜１０重景％置部囲である。上記のシリカ系微粒子の量
が０．０１重量％より少ない場合には、十分な吸水速度
が得られないことがあり、一方、１５重量％を超えると
、上記シリカ系微粒子が飛散することがある。The content of silica-based fine particles is 0 per weight of the sheet.
．． 01 to 15% by weight is preferred, particularly preferably 0.1% by weight.
It is ~10% of the focus. If the amount of the silica-based fine particles is less than 0.01% by weight, a sufficient water absorption rate may not be obtained; on the other hand, if it exceeds 15% by weight, the silica-based fine particles may scatter. .
次に１本発明のシートは、シートの一方の面から他の面
に貫通した連続気孔を有するものである。Next, the sheet of the present invention has continuous pores penetrating from one side of the sheet to the other side.
かかる連続気孔はシートを構成する強化繊維の空隙をぬ
って折れ曲がって一方の面から他方の面に貫通している
もの、一方の面から他方の面に比較的直線的に貫通して
いるもの等が挙げられる。Such continuous pores may be formed by bending through the voids in the reinforcing fibers that make up the sheet, penetrating from one surface to the other, or penetrating relatively straight from one surface to the other. can be mentioned.
本発明において、連続気孔の有無は次のようにして判断
する。すなわち、厚さ１ｎの複合シートから直径ＩＱｍ
ｍの円板を切り抜き、この円板にＩＮβ／ｍｉｎの割合
で空気を流した場合に、圧力損失が１０００＋ｍＨｚＯ
以下の場合に、連続気孔を有すると判断する。上記空気
を流した場合の圧力損失が小さい程、シートに占める連
続気孔の割合が多いことを意味する。また、上記の圧力
損失は、シートの通気性の程度をも表すものである。In the present invention, the presence or absence of continuous pores is determined as follows. That is, from a composite sheet with a thickness of 1n, the diameter IQm
When a disk of m is cut out and air is flowed through this disk at a rate of INβ/min, the pressure loss is 1000 + mHzO.
In the following cases, it is determined that the material has continuous pores. The smaller the pressure loss when the air flows, the higher the proportion of continuous pores in the sheet. Further, the above pressure loss also represents the degree of air permeability of the sheet.
さらに５本発明のシートは、吸水速度が３０ｍｍ／１０
秒以上を有するものである。Furthermore, the sheet of the present invention has a water absorption rate of 30 mm/10
2 seconds or more.
かかる吸水速度は、具体的には次のようにして測定され
る。ます、シートから幅２０ｆｌ、長さ１５０ｎの板を
切り抜く。次に、この板を長手方向に垂直に立てて、下
端３０１１を水中に浸漬し、このときから１０秒後の板
中の上昇水位を読み取り、その値を吸水速度とする。Specifically, this water absorption rate is measured as follows. First, cut out a board with a width of 20fl and a length of 150n from the sheet. Next, this board is stood vertically in the longitudinal direction, the lower end 3011 is immersed in water, and the rising water level in the board is read 10 seconds after this time, and that value is taken as the water absorption rate.
かかる吸水速度が３Ｑ＋＊ｍ／１０秒未満では、結露防
止効果が十分でない。If the water absorption rate is less than 3Q+*m/10 seconds, the dew condensation prevention effect will not be sufficient.
また２本発明のシー１−は、吸水率が６０重置部以上で
ある。Moreover, the water absorption rate of the two seams 1- of the present invention is 60 or more overlapping parts.
ここで、吸水率（重量％）は、シートを水に十分浸した
場合に、シートが保持できる水の割合を示す。Here, the water absorption rate (% by weight) indicates the percentage of water that the sheet can retain when the sheet is sufficiently immersed in water.
かかる吸水率（重量％）は、具体的には次のようにして
測定される。まず、シートの乾燥重量Ｗ（ｇ）を測定す
る。次に、シートを水に十分に浸漬した後、水中から引
き上げて雫を切り、濡れた状態における重量Ｗ ２ （
ｇ ）を測定し５次の式から算出する。Specifically, the water absorption rate (weight %) is measured as follows. First, the dry weight W (g) of the sheet is measured. Next, after fully immersing the sheet in water, it is lifted out of the water and dripped, and the weight in the wet state W 2 (
g) is measured and calculated from the 5th order equation.
かかる吸水率が６０重量％未満では、水分の保持量が少
な（なるので、好ましくない。If the water absorption rate is less than 60% by weight, the amount of water retained will be small, which is not preferable.
本発明のシートは上記のような吸水率を有するものであ
るが、かかる吸水率は気孔率とも関係する。気孔率（％
）は４０〜８０％であることが好ましい。The sheet of the present invention has the water absorption rate as described above, and this water absorption rate is also related to the porosity. Porosity (%
) is preferably 40 to 80%.
ここで、気孔率（％）は、シー１〜の全容積に対する気
孔容積の割合を百分率で表したものである。Here, the porosity (%) is the ratio of the pore volume to the total volume of Sea 1~ expressed as a percentage.
かかる気孔率（％）は、具体的には次のようにして測定
される。まず、シートの乾燥型ｔｔＷ（ｇ）と体積Ｖ（
ｃＪ）を測定する。次に、シートを粉末状にしてシート
の真密度ρ（ｇ／ＣＪ）を測定し、気孔率（％）を次式
により算出する。Specifically, the porosity (%) is measured as follows. First, the dry type ttW (g) of the sheet and the volume V (
cJ). Next, the sheet is powdered, the true density ρ (g/CJ) of the sheet is measured, and the porosity (%) is calculated using the following formula.
かかる気孔率が４０％未満では、連続気孔の割合も少な
くなる傾向がある。一方、気孔率が８０％を超えると２
シートの曲げ強度等の力学的特性が低下する傾向があ
る。If the porosity is less than 40%, the proportion of continuous pores also tends to decrease. On the other hand, if the porosity exceeds 80%, 2
Mechanical properties such as bending strength of the sheet tend to decrease.
また２本発明のシートは２曲げ強度が５０ ｋｇ ／
ｃｔｈ１以上であることが好ましい。曲げ強度は高げれ
ば高い程よいが５通常５０〜３００ ｋｇ ／ ｃｒｌ
Ｏものが適当である。曲げ強度があまり低いと、破損す
るおそれがある。Furthermore, the sheet of the present invention has a bending strength of 50 kg/2.
It is preferable that cth1 or more. The higher the bending strength, the better. 5 Usually 50-300 kg/crl
O is suitable. If the bending strength is too low, there is a risk of breakage.
ここで１曲げ強度はＪ Ｉ Ｓ −Ｋ ７２０３＋ｑ
ｅ□［硬質プラスチックの曲げ試験方法］の規定に基づ
いて測定したものである。Here, 1 bending strength is JIS-K 7203+q
It was measured based on the regulations of e□ [Bending test method for hard plastics].
本発明のシートは２例えば次のようにして製造される。The sheet of the present invention is manufactured, for example, in the following manner.
まず２強化繊維からなるシートに、熱流動性が上記日本
工業規格Ｊ Ｉ Ｓ Ｋ ６９１１１９７９の５．
３．２〔成形材料（円板式流れ）〕に基づく樹脂の伸び
が３〜１５ｃｍの熱硬化性フェノール樹脂の水分散液を
含浸する。First, a sheet made of 2-reinforced fibers was prepared with thermal fluidity of 5.5 of the Japanese Industrial Standard JIS K 69111979.
3.2 [Molding material (disc flow)] Impregnate with an aqueous dispersion of thermosetting phenolic resin with a resin elongation of 3 to 15 cm.
樹脂の伸びが３０ｍ未満の熱流動性を有するフェノール
樹脂を使用した場合には、目的とする多孔性を有するシ
ートを形成しにくいか５または、力学的特性の十分なシ
ートが得られないことがある。If a phenolic resin with thermofluidity with a resin elongation of less than 30 m is used, it may be difficult to form a sheet with the desired porosity5 or a sheet with sufficient mechanical properties may not be obtained. be.
一方、樹脂の伸びが１５ｃｍを超える熱流動性を有する
フェノール樹脂を使用した場合には、加圧・加熱に多孔
性シートの表面部分が融着し易い傾向があり、そのため
、連続気孔を有する多孔性シートを得にくい傾向がある
。On the other hand, when using a phenolic resin with thermal fluidity that allows the elongation of the resin to exceed 15 cm, the surface portion of the porous sheet tends to be easily fused under pressure and heat. It tends to be difficult to obtain a sex sheet.
かかるフェノール樹脂は、上記のように水分散液として
強化繊維に含浸させるものであるが、かかる樹脂を分散
する溶媒すなわち分散媒としては。Such a phenolic resin is impregnated into reinforcing fibers as an aqueous dispersion as described above, and is used as a solvent, that is, a dispersion medium, for dispersing such resin.
例えば水、エタノール、メタノール、メチルエチルケト
ン、エチレングリコール等が挙げられる。Examples include water, ethanol, methanol, methyl ethyl ketone, and ethylene glycol.
これらの分散媒のうち、コストが安価でありかつ取扱い
が容易な水分散媒が特に好ましい。Among these dispersion media, aqueous dispersion media are particularly preferred because they are inexpensive and easy to handle.
上記フェノール樹脂の分散液の濃度は、５〜５０重量％
とすることが好ましい。濃度が５重量％未満の場合は、
樹脂の沈降よって安定な分散液が得られないことがあり
、一方、濃度が５０重量％を超えると２強化繊維への含
浸に当たり、含浸斑が生じる傾向がある。The concentration of the above phenolic resin dispersion is 5 to 50% by weight.
It is preferable that If the concentration is less than 5% by weight,
A stable dispersion may not be obtained due to sedimentation of the resin. On the other hand, if the concentration exceeds 50% by weight, impregnation spots tend to occur when impregnating the 2-reinforced fibers.
強化繊維に含浸させる樹脂量は、得られるシートの重量
当たり、１０〜９０重量％が好ましく、特に好ましくは
３０〜７０重量％の範囲である。上記樹脂量が１０重量
％よりも少ない場合には、十分な力学的特性を得ること
が困難になることがあり、一方。The amount of resin impregnated into the reinforcing fibers is preferably 10 to 90% by weight, particularly preferably 30 to 70% by weight, based on the weight of the sheet obtained. On the other hand, if the amount of the resin is less than 10% by weight, it may be difficult to obtain sufficient mechanical properties.
９０重量％を超えると、気孔率が低下して、連続気孔が
少なくなり、吸水性が低下する傾向がある。When it exceeds 90% by weight, the porosity tends to decrease, the number of continuous pores decreases, and the water absorbency tends to decrease.
次に、絞りローラで上記分散液を絞り１強化繊維シート
に含浸された過剰の分散液を除去する。Next, the dispersion liquid is squeezed using a squeezing roller to remove the excess dispersion liquid impregnated into the reinforcing fiber sheet 1.
ここで、絞りローラの絞り率は、上記分散液の濃度５強
化繊維シートに付着させる樹脂量を勘案して決定する。Here, the squeezing rate of the squeezing roller is determined by taking into consideration the amount of resin to be attached to the reinforcing fiber sheet of the above-mentioned dispersion with a concentration of 5.
次いで、未硬化の樹脂が付着した強化繊維シートを乾燥
する。かかる乾燥は、８０〜１１０℃の温度で１０〜３
０分間程度で行うことが好ましい。Next, the reinforcing fiber sheet to which the uncured resin is attached is dried. Such drying is carried out at a temperature of 80-110°C for 10-3
It is preferable to do this for about 0 minutes.
上記乾燥後に、加圧・加熱して強化繊維シートに付着し
た未硬化の熱硬化性フェノール樹脂を硬化させる。加圧
・加熱は、圧力１〜１０ｋｇ／ａ（、温度１４０〜１８
０℃で１〜２０分間の範囲で行うことが好ましく、特に
圧力３〜６ｋｇ／ｃＪ、温度１５０〜１７０℃で３〜７
分間の範囲で行うことが好ましい。After the above drying, the uncured thermosetting phenol resin attached to the reinforcing fiber sheet is cured by applying pressure and heating. Pressure/heating is performed at a pressure of 1 to 10 kg/a (and a temperature of 140 to 18 kg/a).
It is preferable to carry out the reaction at 0°C for 1 to 20 minutes, particularly at a pressure of 3 to 6 kg/cJ and a temperature of 150 to 170°C for 3 to 7 minutes.
It is preferable to carry out the treatment within a range of minutes.
次に、加圧、加熱して硬化した多孔性シートに。Next, the porous sheet is cured by applying pressure and heating.
粒径１μｍ以下のシリカ系微粒子を添着する。かかるシ
リカ系微粒子の添着は、シリカ系微粒子の水分散液を前
記多孔性複合シートに含浸、乾燥することによって行う
ことが好ましい。Silica-based fine particles with a particle size of 1 μm or less are attached. It is preferable that the silica-based fine particles be impregnated by impregnating the porous composite sheet with an aqueous dispersion of the silica-based fine particles and drying.
本発明においては、上記のシリカ系微粒子を上記のよう
に水分散液として上記多孔性シートに含浸して添着させ
るが、かかるシリカ系微粒子を分散する溶媒すなわち分
散媒としては、水板外にエタノール、メタノール、アセ
トン、メチルエチルケトン等の溶媒を用いてもよい。こ
れらの分散媒のうち、上記多孔性シートに対する親和性
がよく、コストが安価でかつ取扱い、乾燥が容易な点か
らして、水分散媒が特に好ましい。In the present invention, the above-mentioned silica-based fine particles are impregnated and attached to the above-mentioned porous sheet as an aqueous dispersion as described above, but as a solvent for dispersing the silica-based fine particles, that is, a dispersion medium, ethanol is used outside the water plate. , methanol, acetone, methyl ethyl ketone and the like may also be used. Among these dispersion media, an aqueous dispersion medium is particularly preferred because it has good affinity for the porous sheet, is inexpensive, and is easy to handle and dry.
上記シリカ系微粒子の分散液の濃度は、１〜４０重量％
とすることが好ましい。濃度が１重量％未満の場合は、
上記の多孔性シートへのシリカ微粒子の添着量が少なく
なるため、十分な親水性が得られないことがあり、一方
、濃度が４０重量％を超えると、多孔性シートへの含浸
に当たり添着炭が生じたり、乾燥後に上記シリカ微粒子
が飛散したりすることがあるので、好ましくない。The concentration of the dispersion liquid of the silica-based fine particles is 1 to 40% by weight.
It is preferable that If the concentration is less than 1% by weight,
Because the amount of silica fine particles impregnated into the porous sheet is small, sufficient hydrophilicity may not be obtained.On the other hand, if the concentration exceeds 40% by weight, the impregnated carbon is This is not preferable because the fine silica particles may scatter after drying.
次に、シリカ系微粒子が添着した多孔性シートを乾燥す
る。かかる乾燥は、６０℃〜１１０℃の温度で１０〜３
０分間程度で行うことが好ましい。Next, the porous sheet to which the silica-based fine particles are attached is dried. Such drying is carried out at a temperature of 60°C to 110°C for 10 to 3
It is preferable to do this for about 0 minutes.
かくして１強化繊維と硬化したフェノール樹脂とが一体
化し、シリカ系微粒子を含有したシートであって、シー
トの一方の面から他の面に貫通した連続気孔を有し、吸
水速度が３Ｏｎ／１０秒以上。In this way, the reinforcing fibers and the hardened phenolic resin are integrated to form a sheet containing silica-based fine particles, which has continuous pores penetrating from one side of the sheet to the other, and has a water absorption rate of 3 On/10 seconds. that's all.
吸水率が６０重量％以上の多孔性シートが形成される。A porous sheet having a water absorption rate of 60% by weight or more is formed.
通常上記加圧・加熱によって、シートの表面は、連続気
孔が貫通した部分を除き、上記熱硬化性したフェノール
樹脂で被覆される。Usually, by the above-mentioned pressure and heating, the surface of the sheet is coated with the above-mentioned thermosetting phenolic resin, except for the areas where the continuous pores penetrate.
本発明において好ましく用いられるフェノール樹脂は２
例えば、フェノール等のフェノール類又はノボラック樹
脂とホルムアルデヒド等のアルデヒド類とをフン化カル
シウム、アラビアゴム等の懸濁安定剤及びアンモニア水
、ヘキサメチレンテトラミン等の塩基性化合物の存在下
に水性媒体中で反応させることにより製造することがで
きる。The phenolic resin preferably used in the present invention is 2
For example, a phenol such as phenol or a novolak resin and an aldehyde such as formaldehyde are mixed in an aqueous medium in the presence of a suspension stabilizer such as calcium fluoride or gum arabic, and a basic compound such as aqueous ammonia or hexamethylenetetramine. It can be produced by reaction.
本発明の結露防止用シートは、それ自体で用いたときに
、結露を発生するシート類、板状体、建造物の表面等と
組み合わせて、結露防止構造体として利用される。When the dew condensation prevention sheet of the present invention is used by itself, it can be used as a dew condensation prevention structure in combination with sheets, plates, surfaces of buildings, etc. that generate dew condensation.
上記シート類としては、塩化ビニルシート、酢酸ビニル
シート、四フッ化樹脂シート、ニフツ化樹脂フィルム、
ラミネート帆布等が挙げられ、ｉ状体としては、アクリ
ル板のような合成樹脂板。The above-mentioned sheets include vinyl chloride sheet, vinyl acetate sheet, tetrafluoride resin sheet, nifty resin film,
Examples include laminate canvas, and examples of the i-shaped body include synthetic resin plates such as acrylic plates.
アルミニウム板のような金属板、ガラス板等が挙げられ
る。これらに２本発明の結露防止用シートを接合させる
には、熱融着、高周波ウエルダ、ラミネート等の手段が
採用される。Examples include metal plates such as aluminum plates, glass plates, and the like. In order to join the two dew condensation prevention sheets of the present invention to these, means such as heat fusion, high frequency welding, lamination, etc. are employed.
また、建造物としては１モルタル、コンクリート等が挙
げられ、これらの表面に結露防止用シートを取りつける
場合には１両面粘着テープ等を用いることができる。Further, examples of the building include mortar, concrete, etc., and when attaching a dew condensation prevention sheet to the surface thereof, a double-sided adhesive tape or the like can be used.
また、必要に応じて結露防止用シートの表面に化粧シー
ト等を貼着してもよい。Further, a decorative sheet or the like may be attached to the surface of the dew condensation prevention sheet as necessary.
（作 用）
本発明の結露防止用シートは２強化繊維とバインダーと
が一体化し、多数の連続気孔を有するので、かかる気孔
に水分が吸収される。また、シリ系微粒子の存在により
、連続気孔による吸収性が一層助長される。(Function) Since the dew condensation prevention sheet of the present invention has two reinforcing fibers and a binder integrated and has a large number of continuous pores, water is absorbed into the pores. In addition, the presence of silica-based fine particles further promotes absorption by continuous pores.
また、従来の吸収性樹脂をコートしたシートは主として
吸収性樹脂自体の吸収性によって吸水するので、膨潤し
たり１表面がヌルヌルするものであるが２本発明の結露
防止用シートは、主として連続気孔を利用するものであ
るので、膨潤したり。In addition, since conventional sheets coated with absorbent resin absorb water mainly due to the absorbency of the absorbent resin itself, they swell or become slippery on the surface, but the dew condensation prevention sheet of the present invention mainly has continuous pores. Because it uses water, it swells.
表面がヌルヌルすることもない。The surface is not slippery.
（実施例） 次に９本発明を実施例によって具体的に説明する。(Example) Next, the present invention will be specifically explained with reference to Examples.
以下において、水滴吸収速度２寸法変化及び表面状態は
次のようにして評価する。In the following, water droplet absorption rate, 2 dimensional changes, and surface condition are evaluated as follows.
（１）水滴吸収速度（秒）
後述の結露防止構造体を１００ ｍｍ角に切り取って試
験片とする。これを水平に置き、メスピペットを用いて
水５０μｌを水滴として滴下し１水滴が構造体に吸収さ
れるまでの時間を計る。(1) Water droplet absorption rate (seconds) The dew condensation prevention structure described below was cut into a 100 mm square piece to prepare a test piece. This was placed horizontally, and 50 μl of water was dropped as a droplet using a measuring pipette, and the time until one droplet was absorbed into the structure was measured.
上記の試験片は結露防止構造体全体からほぼ均等となる
ように６箇所から採取し、６箇所から採取した試験片の
平均値を水滴吸収速度とする。The above-mentioned test pieces were taken from six locations almost equally throughout the entire dew condensation prevention structure, and the average value of the test pieces taken from the six places was taken as the water droplet absorption rate.
（２）寸法変化（厚みの変化率：％）
結露防止構造体を水に１時間浸漬した後の厚みを測定し
、浸漬前の厚みに対する増加率をもって評価する。(2) Dimensional change (thickness change rate: %) The thickness of the dew condensation prevention structure is measured after being immersed in water for 1 hour, and evaluated based on the increase rate with respect to the thickness before immersion.
（３）表面状態
結露防止構造体を水に１時間浸漬した後の表面状態を観
察する。(3) Surface condition The surface condition of the dew condensation prevention structure is observed after it is immersed in water for one hour.
実施例１〜３．比較例１
目付１００ ｇ ／イ、２００ｇ／ｒｒ？及び４００ｇ
／ｒ／のポリエチレンテレフタレート（以下、ＰＥＴと
いう）繊維の長繊維不織布に、それぞれ前記ＪＩＳに基
づく樹脂の伸びが７．０ｃｍの熱硬化性フェノール樹脂
の水分散液を含浸し、絞りローラでこの分散液を絞った
後、１００℃で２０分間乾燥し、未硬化のフェノール樹
脂が付着したＰＥＴ不織布を得た。この際のフェノール
樹脂付着量は、それぞれ５５ｇ／ｍ。Examples 1-3. Comparative Example 1 Weight: 100 g/rr, 200 g/rr? and 400g
/r/ long fiber nonwoven fabric of polyethylene terephthalate (hereinafter referred to as PET) is impregnated with an aqueous dispersion of a thermosetting phenol resin with a resin elongation of 7.0 cm based on the JIS, and this is dispersed with a squeezing roller. After squeezing the liquid, it was dried at 100° C. for 20 minutes to obtain a PET nonwoven fabric to which uncured phenol resin was attached. The amount of phenol resin deposited at this time was 55 g/m.
１１０ｇ／イ、２２０ｇ／イであった。They were 110g/I and 220g/I.
これらを、１６０℃の温度に予熱したプレス成形機を用
いてＩｋｇ／ｃｏｔの圧力で５分間加圧・加熱しフェノ
ール樹脂を硬化させて厚さ０．５ｍｍ＋ ０．８＋ｎ及
ヒ１ 、６ ａｒｍの３種類のシートを得た。Using a press molding machine preheated to a temperature of 160°C, these were pressed and heated at a pressure of Ikg/cot for 5 minutes to harden the phenolic resin, and the thickness was 0.5 mm + 0.8 + n and 6 arms. Three types of sheets were obtained.
さらに１粒径０．１μｍの微粉末無水珪酸２０ｇを水１
８０ｇに分散させて、微粉末シリカ系粒子の水分散液を
得た。Furthermore, 20 g of finely powdered silicic anhydride with a particle size of 0.1 μm was added to 1 part of water.
An aqueous dispersion of finely powdered silica particles was obtained by dispersing 80 g of the powder.
上記の硬化したシートに、上記微粉末無水珪酸分散液を
含浸した後、 １００”ｃで２０分間乾燥し、微粉末無
水珪酸が添着した複合シートを得た。この際の微粉末無
水珪酸の添着量は約２重量％であった。The above cured sheet was impregnated with the finely powdered silicic anhydride dispersion and then dried at 100"C for 20 minutes to obtain a composite sheet with finely powdered silicic anhydride impregnated. At this time, the finely powdered silicic anhydride was impregnated. The amount was approximately 2% by weight.
得られたシートをそれぞれシートＡ、Ｂ、Ｃ（実施例１
，２．３）とする。The obtained sheets were used as sheets A, B, and C (Example 1), respectively.
, 2.3).
シーＬＡ、Ｂ、Ｃの吸水率、吸水速度及び曲げ強度を測
定したところ、第１表に示す結果が得られた。なお、上
記シートの気孔率はぞれぞれ、 ７０％。When the water absorption rate, water absorption rate, and bending strength of Sea LA, B, and C were measured, the results shown in Table 1 were obtained. The porosity of each of the above sheets is 70%.
６５％、７５％であった。They were 65% and 75%.
第１表
上記のシートを、ポリエチレンフィルムを用いてドライ
ラミネートして、それぞれ厚さ０．６ｍｍの塩化ビニル
シートに接合し、結露防止構造体を形成した。これらを
それぞれ構造体Ａ、、Ｂ、、ｃ、とする。Table 1 The above sheets were dry laminated using polyethylene film and bonded to vinyl chloride sheets each having a thickness of 0.6 mm to form a condensation prevention structure. Let these be structures A, B, and c, respectively.
一方、比較のために、防水帆布にデンプン・アクリロニ
トリル重合体ケン化物をコートした市販の結露防止構造
体を用意した。これを構造体りとする（比較例１）。On the other hand, for comparison, a commercially available anti-condensation structure was prepared by coating a waterproof canvas with a saponified starch-acrylonitrile polymer. This is used as a structure (Comparative Example 1).
構造体Ａ ＋、 Ｂ ＋、 Ｃ＋及び脛の水滴吸収速度
及び寸法変化を測定し、また表面状態を観察した。得ら
れた結果を第２表に示す。The water drop absorption rate and dimensional changes of structures A +, B +, C + and the shin were measured, and the surface condition was also observed. The results obtained are shown in Table 2.
第２表
感を有するものであり、また、吸水によって膨潤するこ
とがなく優れた寸法安定性を有するものであり、優れた
結露防止効果を有するものである。It has a second surface texture, does not swell due to water absorption, has excellent dimensional stability, and has an excellent dew condensation prevention effect.
Claims (1)
つシリカ系微粒子を含有するシートであって、シートの
一方の面から他の面に貫通した多数の連続気孔を有し、
吸水速度が３０ｍｍ／１０秒以上、吸水率が６０重量％
以上であることを特徴とする結露防止用シート。(1) A sheet in which reinforcing fibers and a hardened binder are integrated and contains silica-based fine particles, and has a large number of continuous pores penetrating from one surface of the sheet to the other surface,
Water absorption speed is 30mm/10 seconds or more, water absorption rate is 60% by weight
A dew condensation prevention sheet characterized by the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1029487A JP2809663B2 (en) | 1989-02-08 | 1989-02-08 | Condensation prevention sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1029487A JP2809663B2 (en) | 1989-02-08 | 1989-02-08 | Condensation prevention sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02208334A true JPH02208334A (en) | 1990-08-17 |
| JP2809663B2 JP2809663B2 (en) | 1998-10-15 |
Family
ID=12277433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1029487A Expired - Fee Related JP2809663B2 (en) | 1989-02-08 | 1989-02-08 | Condensation prevention sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809663B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07316337A (en) * | 1994-05-27 | 1995-12-05 | Kanebo Ltd | Water-absorbing sheet and production thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55167193A (en) * | 1979-06-15 | 1980-12-26 | Kuraray Co | Manufacture of dewwpreventing sheettlike construction material |
-
1989
- 1989-02-08 JP JP1029487A patent/JP2809663B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55167193A (en) * | 1979-06-15 | 1980-12-26 | Kuraray Co | Manufacture of dewwpreventing sheettlike construction material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07316337A (en) * | 1994-05-27 | 1995-12-05 | Kanebo Ltd | Water-absorbing sheet and production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2809663B2 (en) | 1998-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |