JP6257265B2 - Wet process nonwoven fabric and its manufacturing method - Google Patents
Wet process nonwoven fabric and its manufacturing method Download PDFInfo
- Publication number
- JP6257265B2 JP6257265B2 JP2013224479A JP2013224479A JP6257265B2 JP 6257265 B2 JP6257265 B2 JP 6257265B2 JP 2013224479 A JP2013224479 A JP 2013224479A JP 2013224479 A JP2013224479 A JP 2013224479A JP 6257265 B2 JP6257265 B2 JP 6257265B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- nonwoven fabric
- wet
- heat
- fibers
- 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.)
- Active
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims description 91
- 238000000034 method Methods 0.000 title claims description 86
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000000835 fiber Substances 0.000 claims description 159
- 239000011230 binding agent Substances 0.000 claims description 103
- 239000012784 inorganic fiber Substances 0.000 claims description 57
- 230000035699 permeability Effects 0.000 claims description 33
- 239000000853 adhesive Substances 0.000 claims description 27
- 239000003365 glass fiber Substances 0.000 claims description 26
- 230000001070 adhesive effect Effects 0.000 claims description 25
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 52
- 239000000123 paper Substances 0.000 description 41
- 239000011248 coating agent Substances 0.000 description 32
- 238000000576 coating method Methods 0.000 description 32
- 239000007788 liquid Substances 0.000 description 31
- 239000002344 surface layer Substances 0.000 description 31
- 239000004372 Polyvinyl alcohol Substances 0.000 description 22
- 229920002451 polyvinyl alcohol Polymers 0.000 description 22
- 239000004566 building material Substances 0.000 description 15
- 229920003043 Cellulose fiber Polymers 0.000 description 14
- 230000007794 irritation Effects 0.000 description 12
- 238000002156 mixing Methods 0.000 description 12
- 229920000728 polyester Polymers 0.000 description 12
- -1 polypropylene Polymers 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000012545 processing Methods 0.000 description 9
- 239000002994 raw material Substances 0.000 description 7
- 239000012779 reinforcing material Substances 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000004800 polyvinyl chloride Substances 0.000 description 6
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 239000012783 reinforcing fiber Substances 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 229920013820 alkyl cellulose Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical compound C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 229920003063 hydroxymethyl cellulose Polymers 0.000 description 1
- 229940031574 hydroxymethyl cellulose Drugs 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001289 polyvinyl ether Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Landscapes
- Paper (AREA)
Description
本発明は、片面が樹脂を均一に浸透させるための表面層であり、反対面が人体への刺激を少なくするための裏面層である無機繊維を用いた湿式法不織布及びその製造法に関する。 The present invention relates to a wet method nonwoven fabric using inorganic fibers, one surface of which is a surface layer for uniformly infiltrating a resin and the other surface is a back layer for reducing irritation to the human body, and a method for producing the same.
従来、天井、壁紙、床材などの建材では可撓性や剛性を得るために、補強材として無機繊維や合成繊維などの補強用繊維シートが使われてきた。これらの繊維シートは構成繊維間に空間（開孔性）を有しており、パルプシートなどの開孔性の無いシートと比較して、ポリ塩化ビニルなどの塗液が浸透しやすく、建材の製造において有利である。特に、加工し易さ、低価格等を理由に、無機繊維であるガラス繊維をシート化してなる不織布が頻繁に使用されている。 Conventionally, a reinforcing fiber sheet such as an inorganic fiber or a synthetic fiber has been used as a reinforcing material in a building material such as a ceiling, wallpaper, or flooring in order to obtain flexibility and rigidity. These fiber sheets have a space (openness) between the constituent fibers. Compared with non-openness sheets such as pulp sheets, coating materials such as polyvinyl chloride are more easily penetrated. It is advantageous in manufacturing. In particular, non-woven fabrics made from glass fibers, which are inorganic fibers, are frequently used because of their ease of processing and low cost.
このような補強用繊維シートはポリ塩化ビニル等の塗液の浸透性が要求される。塗液のシートへの浸透性が低いと、塗液がシートから剥がれるなどの問題が発生する傾向にあり、建材の補強材として使用することができない。補強用繊維シートの浸透性を上げる手法として、繊維径が大きい無機繊維を使用することで開孔性を大きくする手法がある。しかし、繊維径が大きい無機繊維は、人体への刺激が強いという問題があり、建材への加工の際に作業性や作業効率が悪くなるという問題がある。このため、樹脂塗工層を設けた後も人体に触れる機会が無くならない裏面に関しては、人体への刺激を軽減するための処置を施す必要がある。また、建材用途への使用を考慮すると、建材加工時に熱をかけられた際の寸法安定性や、ロールにこすられた際に毛羽が発生しにくい、テンションがかかった際に紙切れなどを起こさないようにある程度は引張強度が高い等の特性が要求される。さらに、建材として使用された際の火災を防止するための耐熱・耐火性などの特性も要求される。 Such a reinforcing fiber sheet is required to have permeability of a coating liquid such as polyvinyl chloride. If the permeability of the coating liquid to the sheet is low, there is a tendency that the coating liquid peels off from the sheet and cannot be used as a reinforcing material for building materials. As a technique for increasing the permeability of the reinforcing fiber sheet, there is a technique for increasing the openness by using inorganic fibers having a large fiber diameter. However, inorganic fibers with a large fiber diameter have a problem that the human body is strongly stimulated, and there is a problem that workability and work efficiency are deteriorated when processing into building materials. For this reason, it is necessary to take measures to reduce irritation to the human body on the back side where the opportunity to touch the human body even after the resin coating layer is provided. Also, considering the use for building materials, dimensional stability when heated during building material processing, fluff does not easily occur when rubbed against a roll, and does not cause paper breakage when tension is applied. Thus, characteristics such as high tensile strength are required to some extent. Furthermore, characteristics such as heat resistance and fire resistance for preventing a fire when used as a building material are also required.
塗液の浸透性を上げるための手法として、例えば繊維径が１３〜２７μｍ、繊維長が１０〜５０ｍｍの太くて長い無機繊維を使用することが示されている（例えば、特許文献１参照）。しかし、無機繊維の種類の選定のみでは、裏面の人体への刺激は軽減されることはなく、建材への加工の際に作業性や作業効率が悪くなるという問題が解消されることはないため、建材の補強材としては良好であるとは言えない。 As a method for increasing the permeability of the coating liquid, for example, it is shown that thick and long inorganic fibers having a fiber diameter of 13 to 27 μm and a fiber length of 10 to 50 mm are used (for example, see Patent Document 1). However, the selection of the inorganic fiber alone does not reduce irritation to the human body on the back side, and it does not eliminate the problem of poor workability and work efficiency when processing into building materials. It cannot be said that it is good as a reinforcing material for building materials.
人体への刺激を軽減するための手法として、無機繊維とポリビニルアルコールバインダーを使用して抄紙し、無機繊維の含有量を５０〜９７％に、ポリビニルアルコールバインダーの含有量を３〜５０％と指定する方法が示されている（例えば、特許文献２参照）。確かにポリビニルアルコールバインダーの含有量が多くなれば人体への刺激が軽減されるが、ポリビニルアルコールバインダーで目が詰まるため、塗液の浸透性が悪くなり、また、寸法安定性や耐熱・耐火性についても悪くなる傾向にあり、コストアップにもなる。建材としての品質やコストを考慮すると、人体に触れる可能性が高い面のみ人体への刺激を軽減する手法が好ましいため、ポリビニルアルコールの含有量を増やすことは建材用途としては良好であるとは言えない。 As a technique to reduce irritation to the human body, paper is made using inorganic fibers and polyvinyl alcohol binder, the inorganic fiber content is specified as 50-97%, and the polyvinyl alcohol binder content is specified as 3-50%. The method to do is shown (for example, refer patent document 2). Certainly, if the content of the polyvinyl alcohol binder increases, the irritation to the human body is reduced, but the clogging with the polyvinyl alcohol binder impairs the permeability of the coating liquid, and also provides dimensional stability, heat resistance and fire resistance. It tends to get worse, and it also increases costs. Considering the quality and cost of building materials, it is preferable to increase the polyvinyl alcohol content because it is preferable to reduce the irritation to the human body only on the surface that is likely to touch the human body. Absent.
繊維径の大きい繊維を使用して、人体への刺激を軽減するための手法として、無機繊維に有機繊維（特にセルロース繊維）を多く混合して抄紙するという方法がある（例えば、特許文献３参照）。セルロース繊維を多く混合することで人体への刺激は軽減されるが、セルロース繊維によって開孔率が小さくなるため浸透性が悪くなる、耐熱収縮率が下がるため建材加工をする際に高熱がかかると収縮する、などという問題がある。また、無機繊維シートは建材用途として使用されることがあるため、耐火性能が要求されるが、セルロース繊維を多く混抄することで耐火性能が悪化する傾向にあるので、セルロース繊維を多く混合することは良好な方法であるとは言えない。 As a technique for reducing irritation to the human body using fibers having a large fiber diameter, there is a method of making paper by mixing a large amount of organic fibers (particularly cellulose fibers) with inorganic fibers (see, for example, Patent Document 3). ). Mixing a lot of cellulose fibers will reduce irritation to the human body, but the cellulose fibers will reduce the open area, so the permeability will be poor, and the heat shrinkage rate will be lowered. There is a problem such as contraction. In addition, since the inorganic fiber sheet may be used as a building material application, fire resistance is required. However, mixing a large amount of cellulose fibers tends to deteriorate the fire resistance by mixing many cellulose fibers. Is not a good method.
人体への刺激を軽減するための手法として、表面から裏面にかけて無機繊維の混抄比率を連続的に減少させる方法がある（例えば、特許文献４参照）。これによって裏面における無機繊維の混抄比率がほぼ０％となり、裏面の人体への刺激を大幅に軽減することができるが、このように無機繊維の混抄比率を連続的に減少させるには特殊な傾斜ワイヤーの装置を使用する必要があり、広く使われている傾斜ワイヤーでは抄紙することができない。また、無機繊維の混抄比率が連続的に減少しているため、裏面の有機繊維の含有量が非常に多くなり、塗液の浸透量が表面と裏面で大きく異なってしまうことで、カールや塗液剥離の問題が発生する可能性があるため、混抄比率を連続的に減少させる方法は良好な方法であるとは言えない。 As a method for reducing irritation to the human body, there is a method of continuously reducing the mixed ratio of inorganic fibers from the front surface to the back surface (see, for example, Patent Document 4). As a result, the mixing ratio of the inorganic fibers on the back side is almost 0%, and the stimulation to the human body on the back side can be greatly reduced, but a special slope is used to continuously reduce the mixing ratio of the inorganic fibers in this way. It is necessary to use a wire device, and it is impossible to make paper with a widely used inclined wire. In addition, since the mixing ratio of inorganic fibers is continuously decreasing, the content of organic fibers on the back side becomes very large, and the penetration amount of the coating liquid is greatly different between the front and back sides. Since there is a possibility that a liquid peeling problem may occur, it cannot be said that the method of continuously reducing the blending ratio is a good method.
本発明は前記の問題点を解決すべくなされたものである。すなわち、無機繊維を用いた湿式法不織布及びその製造法に関し、塗液の浸透性や寸法安定性、引張強度、耐熱・耐火性などの建材の補強材として使用される繊維シートとしての特性を維持しながら、人体への刺激が軽減されている湿式法不織布及びその製造法を提供することを課題としている。 The present invention has been made to solve the above problems. In other words, with respect to wet-type nonwoven fabrics using inorganic fibers and their manufacturing methods, the properties of fiber sheets used as reinforcing materials for building materials, such as the permeability of coating liquid, dimensional stability, tensile strength, heat resistance and fire resistance, are maintained. However, an object of the present invention is to provide a wet method nonwoven fabric in which irritation to the human body is reduced and a method for producing the same.
本発明者らは、上記課題を解決するために鋭意検討した結果、下記発明を見出した。 As a result of intensive studies to solve the above problems, the present inventors have found the following invention.
（１）無機繊維と湿熱接着性バインダー繊維が含まれる層と熱融着性バインダー繊維が含まれる層の二層で構成され、熱融着性バインダー繊維が含まれる層の熱融着性バインダー繊維の含有率が３０％質量以上であり、前記無機繊維がガラス繊維であり、平均繊維径が１〜２０μｍであり、且つ平均繊維長が１〜２０ｍｍであり、無機繊維の含有率が不織布全体の６０〜９５質量％であることを特徴とする湿式法不織布。
（２）前記湿熱接着性バインダー繊維の含有率が、無機繊維と湿熱接着性バインダー繊維が含まれる層の２０質量％以下である上記（１）に記載の湿式法不織布。
（３）フラジール通気度が１５０ｃｍ ３ ／ｃｍ ２ ・ｓ以上である上記（１）または（２）に記載の湿式法不織布。
（４）幅５ｃｍの無機繊維シートの流れ方向を横切るように、表面、裏面それぞれを山にして折り目を付け、折り目の上にステンレス製の直径５ｃｍ、長さ４０ｃｍの円柱状ロールを転がし、折り目に発生した繊維の毛羽立ちの本数が１０本未満である上記（１）〜（３）のいずれかに記載の湿式法不織布。
（５）無機繊維と湿熱接着性バインダー繊維が含まれる層と熱融着性バインダー繊維が含まれる層の坪量比が３〜２００：１である上記（１）〜（４）のいずれかに記載の湿式法不織布。
（６）上記（１）〜（５）のいずれかに記載の無機繊維と湿熱接着性バインダー繊維が含まれる層と熱融着性バインダー繊維が含まれる層の二層で構成される湿式法不織布を製造する湿式法不織布の製造方法において、表面温度が１００℃以上のヤンキードライヤーでバインダー繊維を溶解する工程を含むことを特徴とする湿式法不織布の製造方法。
(1) The heat-fusible binder fiber is composed of two layers, a layer containing inorganic fibers and wet heat-adhesive binder fibers, and a layer containing heat-fusible binder fibers, and a layer containing heat-fusible binder fibers. der content of 30% by mass or more is, the inorganic fibers are glass fibers, an average fiber diameter of 1 to 20 [mu] m, a and an average fiber length of 1 to 20 mm, the content of the inorganic fibers entire nonwoven fabric wet method nonwoven fabric wherein 60 to 95% by mass Rukoto of.
(2) The wet method nonwoven fabric according to (1) above, wherein the content of the wet heat adhesive binder fiber is 20% by mass or less of the layer including the inorganic fiber and the wet heat adhesive binder fiber.
(3) The wet method nonwoven fabric according to the above (1) or (2), wherein the fragile air permeability is 150 cm 3 / cm 2 · s or more.
(4) A crease is formed with the front and back surfaces as peaks so as to cross the flow direction of the inorganic fiber sheet having a width of 5 cm, and a stainless steel cylindrical roll having a diameter of 5 cm and a length of 40 cm is rolled on the fold. The wet method nonwoven fabric according to any one of the above (1) to (3), wherein the number of fluffs of fibers generated in the fiber is less than 10.
(5) In any one of the above (1) to (4), the basis weight ratio of the layer containing the inorganic fiber and the wet heat adhesive binder fiber and the layer containing the heat fusible binder fiber is 3 to 200: 1. The wet process nonwoven fabric as described.
(6) Wet method nonwoven fabric composed of two layers of the inorganic fiber according to any one of (1) to (5 ) above, a layer containing a wet heat adhesive binder fiber, and a layer containing a heat fusible binder fiber In the manufacturing method of the wet method nonwoven fabric which manufactures, The process of melt | dissolving a binder fiber with a Yankee dryer whose surface temperature is 100 degreeC or more is included, The manufacturing method of the wet method nonwoven fabric characterized by the above-mentioned.
本発明の湿式法不織布は、無機繊維と湿熱接着性バインダー繊維が含まれる層と熱融着性バインダー繊維が含まれる層の二層で構成されることを特徴とする湿式法不織布である。無機繊維と湿熱接着性バインダー繊維が含まれる層が、樹脂塗工層が設けられる表面層であり、開孔性に優れるため、塗液の浸透性に優れている。また、熱融着性バインダー繊維が含まれる層が裏面層であり、熱融着性バインダー繊維を使用しているため、毛羽が立ちにくく、人体への刺激が少ない。また、セルロース繊維を使用しないか、または使用量が少量で済むため、引張強度、耐熱・耐火性に優れている。また、無機繊維の含有量が多いため、寸法安定性にも優れている。 The wet process nonwoven fabric of the present invention is a wet process nonwoven fabric characterized by being composed of two layers of a layer containing inorganic fibers and wet heat adhesive binder fibers and a layer containing heat fusible binder fibers. The layer containing the inorganic fiber and the wet heat adhesive binder fiber is a surface layer on which the resin coating layer is provided. In addition, since the layer containing the heat-fusible binder fiber is the back layer and the heat-fusible binder fiber is used, the fluff is hardly generated and the human body is less irritating. In addition, since no cellulose fiber is used or the amount used is small, the tensile strength, heat resistance and fire resistance are excellent. Moreover, since there is much content of an inorganic fiber, it is excellent also in dimensional stability.
以下、本発明を詳細に説明する。図１は、本発明の湿式法不織布の断面模式図である。本発明の湿式法不織布は、無機繊維５を用いてなり、無機繊維と湿熱接着性バインダー繊維が含まれる層３と熱融着性バインダー繊維が含まれる層４の二層で構成されることを特徴とする。無機繊維と湿熱接着性バインダー繊維が含まれる層３が表面１側であり、熱融着性バインダー繊維が含まれる層が裏面２側である。以下、無機繊維と湿熱接着性バインダー層が含まれる層３を「表面層」と、熱融着性バインダー繊維が含まれる層４を「裏面層」と記す場合がある。 Hereinafter, the present invention will be described in detail. FIG. 1 is a schematic cross-sectional view of a wet process nonwoven fabric of the present invention. The wet process nonwoven fabric of the present invention comprises inorganic fibers 5 and is composed of two layers: a layer 3 containing inorganic fibers and wet heat adhesive binder fibers and a layer 4 containing heat fusible binder fibers. Features. The layer 3 containing inorganic fibers and wet heat adhesive binder fibers is on the front surface 1 side, and the layer containing heat fusible binder fibers is on the back surface 2 side. Hereinafter, the layer 3 containing the inorganic fiber and the wet heat adhesive binder layer may be referred to as “surface layer”, and the layer 4 containing the heat-fusible binder fiber may be referred to as “back layer”.
本発明の湿式法不織布は無機繊維を多く使用しており、微細な繊維は含有していないか、あるいは少量しか含有されていないため、シート内に多くの空間があるため、優れた浸透性を持つ。また、熱融着性バインダー繊維を含有してなる裏面層を有するため、毛羽が立ちにくく、繊維脱落による裏抜けも抑制される。 Since the wet method nonwoven fabric of the present invention uses a lot of inorganic fibers and does not contain fine fibers or contains only a small amount, it has a lot of space in the sheet, so it has excellent permeability. Have. Moreover, since it has a back surface layer containing a heat-fusible binder fiber, fluff is less prone to occur and the back-through due to fiber dropping is also suppressed.
本発明で使用する無機繊維としては、ガラス繊維、岩石繊維、炭素繊維、セラミックス繊維が挙げられ、寸法安定性や耐熱性・耐火性に優れていれば、いずれの無機繊維でも良い。補強用繊維シートとしては、寸法安定性、耐熱性・耐火性に優れており、低価格であるガラス繊維が広くかつ好ましく用いられる。 Examples of the inorganic fiber used in the present invention include glass fiber, rock fiber, carbon fiber, and ceramic fiber, and any inorganic fiber may be used as long as it has excellent dimensional stability, heat resistance, and fire resistance. As the reinforcing fiber sheet, glass fibers which are excellent in dimensional stability, heat resistance and fire resistance and are inexpensive are widely and preferably used.
本発明に用いるガラス繊維としては、チョップドストランド、グラスウール、グラスフレークが挙げられ、折れ難く、繊維シート形成能があれば、いずれのガラス繊維でも良い。本発明におけるガラス繊維の繊維径は１〜２０μｍであることが好ましく、２〜１７μｍがより好ましく、３〜１５μｍがさらに好ましい。繊維径が１μｍ未満の場合、細すぎて抄造時に湿式法不織布から脱落し、強度、厚みが不十分となる場合がある。また、目が詰まるため、浸透性不良が発生する場合がある。繊維径が２０μｍを超えた場合、隙間が大きくなり、塗工の浸透はしやすくなるものの、加工性が劣り、さらに皮膚への刺激性がある等、作業性に支障をきたして利用し難くなる場合がある。 Examples of the glass fiber used in the present invention include chopped strands, glass wool, and glass flakes, and any glass fiber may be used as long as it is difficult to break and has a fiber sheet forming ability. The fiber diameter of the glass fiber in the present invention is preferably 1 to 20 μm, more preferably 2 to 17 μm, and further preferably 3 to 15 μm. If the fiber diameter is less than 1 μm, it may be too thin and fall off from the wet method nonwoven fabric during paper making, resulting in insufficient strength and thickness. Moreover, since the eyes are clogged, poor permeability may occur. When the fiber diameter exceeds 20 μm, the gap becomes large and the penetration of the coating becomes easy. However, the workability is poor, and the skin is irritating. There is a case.
また、本発明におけるガラス繊維の繊維長は、１〜２０ｍｍであることが好ましく、２〜１５ｍｍがより好ましい。繊維長が１ｍｍ未満では、強度が不十分となる場合があり、繊維長が２０ｍｍを超えた場合、シートの地合が悪くなり、品質にバラツキが生じる場合がある。 Moreover, it is preferable that the fiber length of the glass fiber in this invention is 1-20 mm, and 2-15 mm is more preferable. If the fiber length is less than 1 mm, the strength may be insufficient, and if the fiber length exceeds 20 mm, the formation of the sheet may deteriorate and quality may vary.
本発明の湿式法不織布では、ガラス繊維の含有率は、湿式法不織布を構成する全繊維成分に対して、６０〜９５質量％であることが好ましく、７０〜９０質量％であることがより好ましく、８０〜８５質量％であることがさらに好ましい。含有率が６０質量％未満だと、塗液の浸透性が悪くなる場合があり、また、耐熱性や寸法安定性も悪くなる場合がある。含有率が９５質量％を超えると、ガラス繊維同士の結合が弱く、強度が低くなる場合がある。 In the wet method nonwoven fabric of the present invention, the glass fiber content is preferably 60 to 95% by mass, more preferably 70 to 90% by mass, based on the total fiber components constituting the wet method nonwoven fabric. 80 to 85% by mass is more preferable. When the content is less than 60% by mass, the permeability of the coating liquid may deteriorate, and the heat resistance and dimensional stability may also deteriorate. When the content exceeds 95% by mass, the bonding between the glass fibers is weak and the strength may be lowered.
本発明で使用するバインダー繊維は、湿熱接着性バインダー繊維と熱融着性バインダー繊維である。湿熱接着性バインダー繊維とは、湿潤状態において、ある温度で繊維状態から流動または容易に変形して接着機能を発現する繊維のことを言う。具体的には、熱水（例えば、８０〜１２０℃程度）で軟化して自己接着または他の繊維に接着可能な熱可塑性繊維であり、例えば、ポリビニル系繊維（ポリビニルピロリドン、ポリビニルエーテル、ポリビニルアルコール系、ポリビニルアセタールなど）、セルロース系繊維（メチルセルロースなどのＣ１−３アルキルセルロース、ヒドロキシメチルセルロースなどのヒドロキシＣ１−３アルキルセルロース、カルボキシメチルセルロースなどのカルボキシＣ１−３アルキルセルロースまたはその塩など）、変性ビニル系共重合体からなる繊維（イソブチレン、スチレン、エチレン、ビニルエーテルなどのビニル系単量体と、無水マレイン酸などの不飽和カルボン酸またはその無水物との共重合体またはその塩など）などが挙げられる。本発明に用いる湿熱接着性バインダー繊維としては、ポリビニルアルコール（ＰＶＡ）系繊維が、湿式法不織布の強度がより高くなり好ましい。 The binder fiber used in the present invention is a wet heat adhesive binder fiber and a heat fusible binder fiber. The wet heat adhesive binder fiber refers to a fiber that exhibits an adhesive function by flowing or easily deforming from a fiber state at a certain temperature in a wet state. Specifically, it is a thermoplastic fiber that is softened with hot water (for example, about 80 to 120 ° C.) and can be self-adhered or bonded to other fibers, for example, polyvinyl fibers (polyvinyl pyrrolidone, polyvinyl ether, polyvinyl alcohol). System, polyvinyl acetal, etc.), cellulosic fibers (C1-3 alkyl cellulose such as methyl cellulose, hydroxy C1-3 alkyl cellulose such as hydroxymethyl cellulose, carboxy C1-3 alkyl cellulose such as carboxymethyl cellulose or salts thereof), modified vinyl type Fibers made of copolymers (copolymers or salts of vinyl monomers such as isobutylene, styrene, ethylene, vinyl ether and unsaturated carboxylic acids such as maleic anhydride or anhydrides thereof) . As the wet heat adhesive binder fiber used in the present invention, a polyvinyl alcohol (PVA) fiber is preferable because the strength of the wet method nonwoven fabric becomes higher.
また、熱融着性バインダー繊維は、抄造の乾燥時に熱融着して接着機能を発現する繊維のことを言う。熱融着性バインダー繊維としては、芯鞘型、偏芯型、サイドバイサイド型、海島型、オレンジ型、多重バイメタル型の複合繊維、あるいは単繊維等が挙げられ、特に、芯鞘型熱融着性バインダー繊維を含有することが好ましい。芯鞘型熱融着性バインダー繊維は、芯部の繊維形状を維持しつつ、鞘部のみを軟化、溶融させて繊維同士を熱接着させるため、基材の緻密な構造を損なわずに繊維同士を接着させるのに好適である。芯鞘型熱融着繊維の芯部と鞘部を構成する樹脂成分は特に制限なく、繊維形成能のある樹脂であれば良い。熱融着性バインダー繊維の具体例としては、ポリプロピレンの単繊維、ポリエチレンの単繊維、低融点ポリエステルの単繊維、ポリプロピレン（芯）とポリエチレン（鞘）の組み合わせの複合繊維、ポリプロピレン（芯）とエチレンビニルアルコール（鞘）の組み合わせの複合繊維、高融点ポリエステル（芯）と低融点ポリエステル（鞘）の組み合わせの複合繊維等が挙げられる。 The heat-fusible binder fiber refers to a fiber that exhibits a bonding function by heat-sealing when the paper is dried. Examples of the heat-fusible binder fiber include a core-sheath type, an eccentric type, a side-by-side type, a sea-island type, an orange type, a multi-bimetal type composite fiber, or a single fiber. It is preferable to contain a binder fiber. The core-sheath-type heat-fusible binder fiber softens and melts only the sheath part while maintaining the fiber shape of the core part, and heat-bonds the fibers to each other without losing the dense structure of the base material. It is suitable for adhering. The resin component constituting the core and sheath of the core-sheath type heat-sealing fiber is not particularly limited as long as it is a resin having fiber forming ability. Specific examples of the heat-fusible binder fiber include polypropylene single fiber, polyethylene single fiber, low-melting polyester single fiber, composite fiber of a combination of polypropylene (core) and polyethylene (sheath), polypropylene (core) and ethylene. Examples include composite fibers of a combination of vinyl alcohol (sheath), composite fibers of a combination of high-melting polyester (core) and low-melting polyester (sheath), and the like.
本発明で使用する熱融着性バインダー繊維は、湿式抄紙が容易であり、人体への刺激が少なく、熱加工後の湿潤強度に優れるポリエチレンテレフタレートまたはポリプロピレンが好ましい。 The heat-fusible binder fiber used in the present invention is preferably polyethylene terephthalate or polypropylene, which is easy to make wet paper, has little irritation to the human body, and has excellent wet strength after heat processing.
湿熱接着性バインダー繊維の繊度は、０．１〜５．６デシテックスが好ましく、０．６〜３．３デシテックスがより好ましく、０．８〜１．５デシテックスがさらに好ましい。０．１デシテックス未満の場合、湿式法不織布が緻密で薄いものになってしまうことがある。一方、５．６デシテックスを超えた場合、無機繊維との接点が少なくなり、湿潤状態下での強度維持が困難になることがあるばかりでなく、均一な地合が取れないことがある。バインダー繊維の繊維長は、１〜２０ｍｍが好ましく、２〜１５ｍｍがより好ましく、３〜１０ｍｍがさらに好ましい。１ｍｍ未満の場合、抄造時に抄紙ワイヤーから抜け落ちることがあり、十分な強度が得られないことがある。一方、２０ｍｍを超えた場合、水に分散する際にもつれ等を起こすことがあり、均一な地合が得られないことがある。 The fineness of the wet heat adhesive binder fiber is preferably 0.1 to 5.6 dtex, more preferably 0.6 to 3.3 dtex, and still more preferably 0.8 to 1.5 dtex. If it is less than 0.1 dtex, the wet process nonwoven fabric may become dense and thin. On the other hand, when it exceeds 5.6 dtex, not only the contact with the inorganic fiber is decreased, it may be difficult to maintain the strength under the wet condition, but the uniform formation may not be obtained. The fiber length of the binder fiber is preferably 1 to 20 mm, more preferably 2 to 15 mm, and still more preferably 3 to 10 mm. If it is less than 1 mm, it may fall out of the papermaking wire during papermaking, and sufficient strength may not be obtained. On the other hand, when it exceeds 20 mm, it may cause entanglement when dispersed in water, and a uniform formation may not be obtained.
熱融着性バインダー繊維の繊度は、０．１〜５．６デシテックスが好ましく、０．６〜３．３デシテックスがより好ましく、０．８〜１．５デシテックスがさらに好ましい。０．１デシテックス未満の場合、湿式法不織布が緻密で薄いものになってしまうことがある。一方、５．６デシテックスを超えた場合、無機繊維との接点が少なくなり、湿潤状態下での強度維持が困難になることがあるばかりでなく、均一な地合が取れないことがある。バインダー繊維の繊維長は、１〜２０ｍｍが好ましく、２〜１５ｍｍがより好ましく、３〜１０ｍｍがさらに好ましい。１ｍｍ未満の場合、抄造時に抄紙ワイヤーから抜け落ちることがあり、十分な強度が得られないことがある。一方、２０ｍｍを超えた場合、水に分散する際にもつれ等を起こすことがあり、均一な地合が得られないことがある。 The fineness of the heat-fusible binder fiber is preferably 0.1 to 5.6 dtex, more preferably 0.6 to 3.3 dtex, and still more preferably 0.8 to 1.5 dtex. If it is less than 0.1 dtex, the wet process nonwoven fabric may become dense and thin. On the other hand, when it exceeds 5.6 dtex, not only the contact with the inorganic fiber is decreased, it may be difficult to maintain the strength under the wet condition, but the uniform formation may not be obtained. The fiber length of the binder fiber is preferably 1 to 20 mm, more preferably 2 to 15 mm, and still more preferably 3 to 10 mm. If it is less than 1 mm, it may fall out of the papermaking wire during papermaking, and sufficient strength may not be obtained. On the other hand, when it exceeds 20 mm, it may cause entanglement when dispersed in water, and a uniform formation may not be obtained.
表面層の湿熱接着性バインダー繊維の含有率は２０質量％以下が好ましく、１５質量％以下がより好ましい。バインダー繊維の含有率が２０質量％よりも多い場合は、耐熱性・耐火性が下がる傾向にあり、補強用繊維シート加工後にトラブルが発生する場合があるため、表面層の湿熱接着性バインダー繊維の含有率は２０質量％以下が好ましい。 The content of the wet heat adhesive binder fiber in the surface layer is preferably 20% by mass or less, and more preferably 15% by mass or less. When the content of the binder fiber is more than 20% by mass, the heat resistance and fire resistance tend to decrease, and troubles may occur after processing the reinforcing fiber sheet. The content is preferably 20% by mass or less.
裏面層の熱融着性バインダー繊維の含有率は３０質量％以上が好ましく、５０質量％以上がより好ましい。バインダー繊維の含有率が３０質量％よりも少ない場合は、毛羽を抑制することができず、人体への刺激や毛羽立った繊維の脱落による塗工不良が改善されない場合があり、裏面層の熱融着性バインダー繊維の含有率は３０質量％以上が好ましい。 30 mass% or more is preferable and, as for the content rate of the heat-fusible binder fiber of a back surface layer, 50 mass% or more is more preferable. When the content of the binder fiber is less than 30% by mass, fluff cannot be suppressed, and coating failure due to irritation to the human body or falling off of the fluffy fiber may not be improved. The content of the adhesive binder fiber is preferably 30% by mass or more.
本発明において、無機繊維、バインダー繊維に加えて、必要に応じて、性能を阻害しない範囲で、バインダー性能を有しない繊維を配合することができ、その結果、さらに空隙部を増すことや湿紙抄紙の操業性を安定化することができる。繊維としては、セルロース繊維、レーヨン、キュプラ、リヨセル繊維等の再生繊維、アセテート、トリアセテート、プロミックス等の半合成繊維、ポリオレフィン系、ポリアミド系、ポリアクリル系、ビニロン系、ビニリデン、ポリ塩化ビニル、ポリエステル系、ベンゾエート、ポリクラール（（ｐｏｌｙｃｈｌａｌ）、フェノール系などの繊維等の合成繊維を加えることができる。 In the present invention, in addition to the inorganic fiber and the binder fiber, if necessary, a fiber having no binder performance can be blended within a range not impairing the performance. The operability of papermaking can be stabilized. Recycled fibers such as cellulose fiber, rayon, cupra, lyocell fiber, semi-synthetic fiber such as acetate, triacetate, promix, etc., polyolefin, polyamide, polyacryl, vinylon, vinylidene, polyvinyl chloride, polyester Synthetic fibers such as fibers of benzoate, polychral (phenolic), phenolic, etc. can be added.
本発明の湿式法不織布は必要に応じて、性能を阻害しない範囲で、液状のバインダーを塗抹することができる。バインダーには、ポリビニルアルコール、塩化ビニル共重合体、酢酸ビニル共重合体、アクリル、スチレン・ブタジエン・ラバー（ＳＢＲ）、メタクリレート・ブタジエン・ラバー等の高分子をバインダーとして使用できる。該湿式法不織布に発泡樹脂の加工を施した後で乾燥時に熱がかかるため、耐熱性の高いアクリルの使用が有効である。 The wet method nonwoven fabric of the present invention can be smeared with a liquid binder as long as the performance is not impaired. Polymers such as polyvinyl alcohol, vinyl chloride copolymer, vinyl acetate copolymer, acrylic, styrene / butadiene / rubber (SBR), methacrylate / butadiene / rubber can be used as the binder. Since heat is applied during drying after processing the foamed resin on the wet method nonwoven fabric, it is effective to use acrylic having high heat resistance.
液状バインダーの付着量は、固形分付着量が１〜１０ｇ／ｍ２であることが好ましい。固形分付着量が１ｇ／ｍ２未満だと、十分な強度が得られない傾向があり、安定した製品ができにくくなる。１０ｇ／ｍ２を超えると、耐熱寸法安定性が下がる傾向にあり、塗液の塗工後にトラブルが発生する場合がある。 As for the adhesion amount of a liquid binder, it is preferable that solid content adhesion amount is 1-10 g / m < 2 >. When the solid content adhesion amount is less than 1 g / m 2 , there is a tendency that sufficient strength cannot be obtained, and it becomes difficult to produce a stable product. If it exceeds 10 g / m 2 , the heat-resistant dimensional stability tends to be lowered, and trouble may occur after coating of the coating liquid.
液状バインダーを塗抹する方法としては、バインダー塗抹液を調製し、表面層側に塗抹する。抄紙工程の途中に設置された２ロールサイズプレス、ゲートロールコーター、エアナイフコーター、ブレードコーター、コンマコーター、バーコーター、グラビアコーター、キスコーター等の含浸または塗工装置による処理が可能であるが、これに限定されるものではない。また、抄紙後にオフマシン装置での含浸または塗工処理も可能である。 As a method of smearing the liquid binder, a binder smear is prepared and smeared on the surface layer side. It can be processed by impregnation or coating equipment such as 2-roll size press, gate roll coater, air knife coater, blade coater, comma coater, bar coater, gravure coater, kiss coater etc. installed in the middle of the paper making process. It is not limited. Further, impregnation or coating treatment in an off-machine apparatus is possible after paper making.
本発明の湿式法不織布の坪量は特に限定しないが、２０〜１００ｇ／ｍ２であることが好ましく、３０〜８０ｇ／ｍ２がより好ましい。この坪量は不織布を形成する繊維と液状バインダーを併せた値である。２０ｇ／ｍ２未満では、塗液の浸透量が少なく、裏抜けなどの問題が発生する場合があり、また、引張強度、硬さにも問題があり、塗抹工程や印刷の際に断紙を起こす恐れがある。一方、１００ｇ／ｍ２超では、引張強度や硬さは問題ないものの、塗液が過剰に浸透して、表面の地合が粗くなる場合がある。 The basis weight of the wet process nonwoven fabric of the present invention is not particularly limited, but is preferably 20~100g / m 2, 30~80g / m 2 is more preferable. This basis weight is a value obtained by combining the fiber forming the nonwoven fabric and the liquid binder. If it is less than 20 g / m 2 , the amount of penetration of the coating liquid is small and problems such as back-through may occur, and there are also problems in tensile strength and hardness. There is a risk of waking up. On the other hand, if it exceeds 100 g / m 2 , the tensile strength and hardness are not a problem, but the coating liquid may permeate excessively and the surface texture may become rough.
表面層の坪量は、１８〜９８ｇ／ｍ２が好ましく、２０〜７９ｇ／ｍ２がより好ましく、３０〜６９ｇ／ｍ２がさらに好ましい。１８ｇ／ｍ２未満の場合、均一な地合を得ることが困難であり、また、塗液の浸透性が悪くなる場合がある。湿式法による二層抄きの場合、表面層の坪量が重過ぎると、抄造時の安定性が損なわれるため、坪量は９８ｇ／ｍ２以下とすることが好ましい。 The basis weight of the surface layer is preferably 18~98g / m 2, more preferably 20~79g / m 2, more preferably 30~69g / m 2. If it is less than 18 g / m 2 , it is difficult to obtain a uniform texture, and the permeability of the coating liquid may deteriorate. In the case of two-layer papermaking by a wet method, if the basis weight of the surface layer is too heavy, the stability during papermaking is impaired, so the basis weight is preferably 98 g / m 2 or less.
裏面層の坪量は、１〜１０ｇ／ｍ２が好ましく、２〜８ｇ／ｍ２がより好ましい。１ｇ／ｍ２未満の場合、熱融着性バインダー繊維の量が少ないため、毛羽立ちを抑えることができずに毛羽立ちが発生する恐れがある。一方、１０ｇ／ｍ２を超えた場合、湿式法不織布自体の有機分比率がアップし、湿式法不織布としての寸法安定性や浸透性や耐熱・耐火性を維持できなくなる場合がある。 The basis weight of the back layer is preferably 1~10g / m 2, 2~8g / m 2 is more preferable. When the amount is less than 1 g / m 2, the amount of the heat-fusible binder fiber is small, so that the fuzz cannot be suppressed and the fuzz may occur. On the other hand, when it exceeds 10 g / m 2 , the organic content ratio of the wet process nonwoven fabric itself increases, and the dimensional stability, permeability, heat resistance, and fire resistance as the wet process nonwoven fabric may not be maintained.
本発明の湿式法不織布のフラジール通気度は、１５０ｃｍ３／ｃｍ２・ｓ以上であることが好ましく、２００ｃｍ３／ｃｍ２・ｓ以上であることがより好ましい。１５０ｃｍ３／ｃｍ２・ｓ未満では、塗液の浸透性が低く、塗液と湿式法不織布が剥離する場合がある。 The fragile air permeability of the wet method nonwoven fabric of the present invention is preferably 150 cm 3 / cm 2 · s or more, and more preferably 200 cm 3 / cm 2 · s or more. If it is less than 150 cm < 3 > / cm < 2 > s, the permeability of a coating liquid is low, and a coating liquid and a wet method nonwoven fabric may peel.
本発明の湿式不織布の幅５ｃｍの流れ方向を横切るように、表面、裏面それぞれを山にして折り目を付け、折り目の上にステンレス製の直径５ｃｍ、長さ４０ｃｍの円柱状ロールを転がし、折り目に発生した繊維の毛羽立ちの本数は１０本未満であることが好ましく、５本未満であることがより好ましい。１０本以上である場合、ポリ塩化ビニルなどを塗工する際に脱落繊維が発生する場合がある。脱落繊維はロールに付着することで、ロールに汚れを発生させる場合や、ポリ塩化ビニルに付着することで塗工面の表面性を著しく悪化させる場合がある。 The wet nonwoven fabric of the present invention is creased with the front and back surfaces as ridges so as to cross the flow direction of 5 cm in width, and a stainless steel cylindrical roll having a diameter of 5 cm and a length of 40 cm is rolled on the fold. The number of fluffs of the generated fiber is preferably less than 10 and more preferably less than 5. When the number is 10 or more, dropped fibers may be generated when applying polyvinyl chloride or the like. The fallen fibers may adhere to the roll to cause stains on the roll, or may adhere to the polyvinyl chloride to significantly deteriorate the surface properties of the coated surface.
この他に、本発明の所望の効果を損なわない範囲で、湿式法不織布には、各種アニオン性、ノニオン性、カチオン性、あるいは両性の歩留り向上剤、濾水剤、分散剤、紙力向上剤や粘剤を、必要に応じて適宜選択して含有させることができる。なお、ｐＨ調整剤、消泡剤、ピッチコントロール剤、スライムコントロール剤等の抄紙用内添助剤を目的に応じて適宜添加することも可能である。また、必要に応じて、クレー、カオリン、焼成カオリン、タルク、炭酸カルシウム、二酸化チタン等の填料や、水酸化アルミニウム、水酸化マグネシウム等の自己消火性を有する填料等も含有させることができる。 In addition, the wet process nonwoven fabric includes various anionic, nonionic, cationic, or amphoteric yield improvers, drainage agents, dispersants, paper strength improvers as long as the desired effects of the present invention are not impaired. And a viscosity agent can be appropriately selected and contained as necessary. In addition, it is also possible to appropriately add internal additives for papermaking such as a pH adjuster, an antifoaming agent, a pitch control agent, and a slime control agent depending on the purpose. Further, if necessary, a filler such as clay, kaolin, calcined kaolin, talc, calcium carbonate, titanium dioxide, or a self-extinguishing filler such as aluminum hydroxide or magnesium hydroxide can also be contained.
本発明の湿式法不織布は、円網、長網、短網、傾斜ワイヤー等の抄き網を有する抄紙機でこれらの抄き網から同種または異種の複数の抄き網を組み合わせるコンビネーション抄紙機や、複数のヘッドボックスを有し、ワイヤー上で湿紙を重ね合わせる抄紙機にて製造することができる。原料スラリーには、繊維原料の他に、必要に応じて、分散剤、紙力増強剤、増粘剤、無機填料、有機填料、消泡剤などを適宜添加し、５〜０．００１質量％程度の固形分濃度で原料スラリーを調製する。この原料スラリーを、さらに所定濃度に希釈して抄造する。次いで、抄造されたウェブは、プレスロールなどでニップされ、次いで、ヤンキードライヤーを使用し、バインダー繊維を溶融させて、強度を発現させる。ヤンキードライヤーにて乾燥することにより、乾燥された表面は鏡面となり、表面の凹凸が少ない面を形成できる特徴がある。その他補助乾燥として、熱風乾燥機、加熱ロール、赤外線ヒーターなどの加熱装置を併用しても問題はない。この時の乾燥温度としては、湿紙ウェブの水分が十分に除去でき、バインダー繊維により強度を発現できる温度とすることが好ましい。また、円網、長網、短網、傾斜ワイヤー等の抄き網を有する抄紙機にて単層ずつ抄紙し、後加工で熱により重ね合わせる多層品として製造することも可能である。ヤンキードライヤーの温度は１００℃以上であることが好ましく、１２０℃以上であることがより好ましい。１００℃未満である場合、熱融着性バインダー繊維に十分に熱がかからず、毛羽立ちを抑制することができない場合がある。 The wet method nonwoven fabric of the present invention is a combination paper machine that combines a plurality of same or different types of paper nets from paper machines having paper nets such as circular nets, long nets, short nets, and inclined wires. It can be manufactured by a paper machine having a plurality of head boxes and overlaying wet paper on a wire. In addition to the fiber raw material, a dispersant, a paper strength enhancer, a thickener, an inorganic filler, an organic filler, an antifoaming agent, and the like are appropriately added to the raw material slurry as necessary. A raw material slurry is prepared at a solid content concentration of about. This raw material slurry is further diluted to a predetermined concentration and made into paper. Next, the paper web is nipped by a press roll or the like, and then the binder fiber is melted using a Yankee dryer to develop strength. By drying with a Yankee dryer, the dried surface becomes a mirror surface, and a surface with less surface irregularities can be formed. In addition, there is no problem even if a heating device such as a hot air dryer, a heating roll, or an infrared heater is used in combination as auxiliary drying. The drying temperature at this time is preferably set to a temperature at which moisture of the wet paper web can be sufficiently removed and strength can be expressed by the binder fiber. It is also possible to produce a multilayer product in which paper is made in a single layer by a paper machine having a paper net such as a circular net, a long net, a short net, and an inclined wire, and then superposed by heat in post-processing. The temperature of the Yankee dryer is preferably 100 ° C. or higher, and more preferably 120 ° C. or higher. When the temperature is lower than 100 ° C., the heat-fusible binder fiber is not sufficiently heated and fuzzing may not be suppressed.
以下、実施例によって本発明をさらに詳しく説明するが、本発明はこの実施例に限定されるものではない。なお、実施例中の部数や百分率は質量基準である。なお、実施例５、２０、２１、２４及び２５は参考例である。
EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to this Example. In addition, the number of parts and percentage in an Example are based on mass. Examples 5 , 20 , 21 , 24, and 25 are reference examples.
実施例１
パルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ＰＶＡバインダー繊維（商品名：ＶＰＢ１０７、株式会社クラレ製、１．０デシテックス×３ｍｍ、湿熱接着性バインダー繊維）を７：１の質量比率で投入して１０分間混合分散した後、貯蔵タンクに送り、抄紙ヘッドタンクから、坪量４０ｇ／ｍ２となるような抄造条件で、表面層を抄造した。
Example 1
To the water in the pulper dispersion tank, glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), PVA binder fiber (trade name: VPB107, manufactured by Kuraray Co., Ltd., 1.0 decitex × 3 mm) , Wet heat adhesive binder fiber) at a mass ratio of 7: 1, mixed and dispersed for 10 minutes, then sent to a storage tank, and from the papermaking head tank under the papermaking conditions such that the basis weight is 40 g / m 2 The layer was made.
別のパルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ポリエステル（ポリエチレンテレフタレート）バインダー繊維（商品名：ＴＡ０７Ｎ、帝人株式会社製、１．２デシテックス×５ｍｍ、ポリエステル全溶融型、熱融着性バインダー繊維）を１：１の質量比率で投入して１０分間混合分散した後、坪量５ｇ／ｍ２となるような抄造条件で、表面層に抄き合わせを行い、湿紙状態の二層構造の紙を抄造した。湿紙状態でプレスを行い、表面層が１２０℃のヤンキードライヤーに当たるようにして乾燥し、坪量４５ｇ／ｍ２の二層構造の紙を得た。 In water in another pulper dispersion tank, glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), polyester (polyethylene terephthalate) binder fiber (trade name: TA07N, manufactured by Teijin Ltd., 1.2 decitex × 5 mm, polyester all-melt type, heat-fusible binder fiber) at a mass ratio of 1: 1, mixed and dispersed for 10 minutes, and under a papermaking condition such that the basis weight is 5 g / m 2. Then, paper was made on the surface layer to make a double-layer paper in the wet paper state. The paper was pressed in a wet paper state and dried so that the surface layer hit a Yankee dryer at 120 ° C. to obtain a paper having a two-layer structure with a basis weight of 45 g / m 2 .
液状バインダーとして、ポリビニルアルコール（商品名：ＰＶＡ−１１７、株式会社クラレ製）を水に分散して塗抹液を調製した。本塗抹液をサチュレータ塗工装置にて、上記二層構造の紙の裏面層側から、付着量が乾燥質量５ｇ／ｍ２になるような条件で塗抹した後乾燥し、坪量５０ｇ／ｍ２の湿式法不織布を得た。 As a liquid binder, polyvinyl alcohol (trade name: PVA-117, manufactured by Kuraray Co., Ltd.) was dispersed in water to prepare a smear solution. The smear solution is smeared with a saturator coating device from the back layer side of the paper with the above two-layer structure under the condition that the adhesion amount becomes a dry mass of 5 g / m 2 and then dried to have a basis weight of 50 g / m 2 The wet method nonwoven fabric was obtained.
実施例２
表面層のガラス繊維とＰＶＡバインダー繊維の質量比率を３９：１に変えた以外は実施例１と同様に実施例２の湿式法不織布を得た。
Example 2
A wet method nonwoven fabric of Example 2 was obtained in the same manner as in Example 1 except that the mass ratio of the glass fiber and PVA binder fiber in the surface layer was changed to 39: 1.
実施例３
表面層のガラス繊維とＰＶＡバインダー繊維の質量比率を１３：３に変えた以外は実施例１と同様に実施例３の湿式法不織布を得た。
Example 3
A wet method nonwoven fabric of Example 3 was obtained in the same manner as in Example 1 except that the mass ratio of the glass fiber and PVA binder fiber in the surface layer was changed to 13: 3.
実施例４
表面層のガラス繊維とＰＶＡバインダー繊維の質量比率を５：３に変えた以外は実施例１と同様に実施例４の湿式法不織布を得た。
Example 4
A wet method nonwoven fabric of Example 4 was obtained in the same manner as in Example 1 except that the mass ratio of the glass fiber and PVA binder fiber in the surface layer was changed to 5: 3.
実施例５
裏面層のガラス繊維とポリエステルバインダー繊維の質量比率を４：１に変えた以外は実施例１と同様に実施例５の湿式法不織布を得た。
Example 5
A wet method nonwoven fabric of Example 5 was obtained in the same manner as in Example 1 except that the mass ratio of the glass fiber and polyester binder fiber in the back layer was changed to 4: 1.
実施例６
裏面層のガラス繊維とポリエステルバインダー繊維の質量比率を１：４に変えた以外は実施例１と同様に実施例６の湿式法不織布を得た。
Example 6
A wet method nonwoven fabric of Example 6 was obtained in the same manner as in Example 1 except that the mass ratio of the glass fiber and polyester binder fiber in the back layer was changed to 1: 4.
実施例７
裏面層の配合を、ポリエステルバインダー繊維１００％とした以外は実施例１と同様に実施例７の湿式法不織布を得た。
Example 7
A wet method nonwoven fabric of Example 7 was obtained in the same manner as in Example 1 except that the composition of the back layer was 100% polyester binder fiber.
実施例８
繊維配合が実施例１と同様であり、且つ表面層と裏面層とＰＶＡ塗沫量の坪量比率も実施例１と同様である湿式法不織布を、全体の坪量が４０ｇ／ｍ２となるようにした以外は実施例１と同様に実施例８の湿式法不織布を得た。
Example 8
The wet basis nonwoven fabric in which the fiber blending is the same as in Example 1 and the basis weight ratio of the surface layer, the back layer, and the PVA coating amount is the same as in Example 1, and the overall basis weight is 40 g / m 2. A wet method nonwoven fabric of Example 8 was obtained in the same manner as in Example 1 except for the above.
実施例９
繊維配合が実施例１と同様であり、且つ表面層と裏面層とＰＶＡ塗沫量の坪量比率も実施例１と同様である湿式法不織布を、全体の坪量を２０ｇ／ｍ２とした以外は実施例１と同様に実施例９の湿式法不織布を得た。
Example 9
A wet method nonwoven fabric in which the fiber blending is the same as in Example 1 and the basis weight ratio of the surface layer, the back layer, and the PVA coating amount is the same as in Example 1, and the overall basis weight is 20 g / m 2 . Except that, a wet method nonwoven fabric of Example 9 was obtained in the same manner as Example 1.
実施例１０
繊維配合が実施例１と同様であり、且つ表面層と裏面層とＰＶＡ塗沫量の坪量比率も実施例１と同様である湿式法不織布を、全体の坪量を７０ｇ／ｍ２とした以外は実施例１と同様に実施例１０の湿式法不織布を得た。
Example 10
The wet basis nonwoven fabric in which the fiber blending is the same as in Example 1 and the basis weight ratio of the surface layer, the back layer, and the PVA coating amount is the same as in Example 1, and the overall basis weight is 70 g / m 2 . The wet method nonwoven fabric of Example 10 was obtained similarly to Example 1 except for.
実施例１１
繊維配合が実施例１と同様であり、且つ表面層と裏面層とＰＶＡ塗沫量の坪量比率も実施例１と同様である湿式法不織布を、全体の坪量を９０ｇ／ｍ２とした以外は実施例１と同様に実施例１１の湿式法不織布を得た。
Example 11
The wet basis nonwoven fabric in which the fiber blending is the same as in Example 1 and the basis weight ratio of the surface layer, the back layer, and the PVA coating amount is the same as in Example 1, and the overall basis weight is 90 g / m 2 . Except that, a wet method nonwoven fabric of Example 11 was obtained in the same manner as Example 1.
実施例１２
表面層の坪量を１６ｇ／ｍ２に変えた以外は実施例１と同様に実施例１２の湿式法不織布を得た。
Example 12
A wet method nonwoven fabric of Example 12 was obtained in the same manner as in Example 1 except that the basis weight of the surface layer was changed to 16 g / m 2 .
実施例１３
表面層の坪量を５６ｇ／ｍ２に変えた以外は実施例１と同様に実施例１３の湿式法不織布を得た。
Example 13
A wet method nonwoven fabric of Example 13 was obtained in the same manner as in Example 1 except that the basis weight of the surface layer was changed to 56 g / m 2 .
実施例１４
裏面層の坪量を０．５ｇ／ｍ２に変えた以外は実施例１と同様に実施例１４の湿式法不織布を得た。
Example 14
A wet method nonwoven fabric of Example 14 was obtained in the same manner as in Example 1 except that the basis weight of the back surface layer was changed to 0.5 g / m 2 .
実施例１５
裏面層の坪量を８ｇ／ｍ２に変えた以外は実施例１と同様に実施例１５の湿式法不織布を得た。
Example 15
A wet method nonwoven fabric of Example 15 was obtained in the same manner as in Example 1 except that the basis weight of the back surface layer was changed to 8 g / m 2 .
実施例１６
液状バインダーの付着量を乾燥重量で０．５ｇ／ｍ２に変えた以外は実施例１と同様に実施例１６の湿式法不織布を得た。
Example 16
A wet method nonwoven fabric of Example 16 was obtained in the same manner as in Example 1 except that the adhesion amount of the liquid binder was changed to 0.5 g / m 2 by dry weight.
実施例１７
液状バインダーの付着量を乾燥重量で１０ｇ／ｍ２に変えた以外は実施例１と同様に実施例１７の湿式法不織布を得た。
Example 17
A wet method nonwoven fabric of Example 17 was obtained in the same manner as in Example 1 except that the adhesion amount of the liquid binder was changed to 10 g / m 2 by dry weight.
実施例１８
表面層の原材料を分散するパルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ＰＶＡバインダー繊維（商品名：ＶＰＢ１０７、株式会社クラレ製、１．０デシテックス×３ｍｍ）、セルロース繊維を６：１：１の質量比率で投入したこと以外は実施例１と同様に実施例１８の湿式法不織布を得た。
Example 18
Glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), PVA binder fiber (trade name: VPB107, manufactured by Kuraray Co., Ltd.) in water in a pulper dispersion tank that disperses the raw material of the surface layer 1.0 decitex × 3 mm), and a wet method nonwoven fabric of Example 18 was obtained in the same manner as Example 1 except that cellulose fibers were added at a mass ratio of 6: 1: 1.
実施例１９
表面層の原材料を分散するパルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ＰＶＡバインダー繊維（商品名：ＶＰＢ１０７、株式会社クラレ製、１．０デシテックス×３ｍｍ）、セルロース繊維を５：１：２の質量比率で投入したこと以外は実施例１と同様に実施例１９の湿式法不織布を得た。
Example 19
Glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), PVA binder fiber (trade name: VPB107, manufactured by Kuraray Co., Ltd.) in water in a pulper dispersion tank that disperses the raw material of the surface layer 1.0 decitex × 3 mm) and a wet method nonwoven fabric of Example 19 was obtained in the same manner as in Example 1 except that cellulose fibers were added at a mass ratio of 5: 1: 2.
実施例２０
裏面層の原材料を分散するパルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ポリエステルバインダー繊維（商品名：ＴＡ０７Ｎ、帝人株式会社製、１．１デシテックス×５ｍｍ）、セルロース繊維を１：１：２の質量比率で投入し、裏面層の坪量が１０ｇ／ｍ２となるように抄紙した以外は実施例１と同様に実施例２０の湿式法不織布を得た。
Example 20
Glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), polyester binder fiber (trade name: TA07N, manufactured by Teijin Limited) in water in a pulper dispersion tank that disperses the raw material of the back layer 1.1 decitex × 5 mm), cellulose fiber was added at a mass ratio of 1: 1: 2, and the same as in Example 1 except that the paper was made so that the basis weight of the back layer was 10 g / m 2. 20 wet process nonwoven fabrics were obtained.
実施例２１
裏面層の原材料を分散するパルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ポリエステルバインダー繊維（商品名：ＴＡ０７Ｎ、帝人株式会社製、１．２デシテックス×５ｍｍ）、セルロース繊維を１：１：４の質量比率で投入し、裏面層の坪量が１５ｇ／ｍ２となるように抄紙した以外は実施例１と同様に実施例２１の湿式法不織布を得た。
Example 21
Glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), polyester binder fiber (trade name: TA07N, manufactured by Teijin Ltd.) 1.2 decitex × 5 mm), Example 1 as in Example 1 except that cellulose fibers were added at a mass ratio of 1: 1: 4 and paper was made so that the basis weight of the back layer was 15 g / m 2. 21 wet process nonwoven fabrics were obtained.
実施例２２
裏面層の坪量を１０ｇ／ｍ２に変えた以外は実施例１と同様に実施例２２の湿式法不織布を得た。
Example 22
A wet method nonwoven fabric of Example 22 was obtained in the same manner as in Example 1 except that the basis weight of the back surface layer was changed to 10 g / m 2 .
実施例２３
裏面層の坪量を２０ｇ／ｍ２に変えた以外は実施例１と同様に実施例２３の湿式法不織布を得た。
Example 23
A wet method nonwoven fabric of Example 23 was obtained in the same manner as in Example 1 except that the basis weight of the back surface layer was changed to 20 g / m 2 .
実施例２４
湿式不織布に使用するガラス繊維を繊維径の大きいもの（商品名：ＥＣＳ２５Ｉ−５３５Ｋ、日本電気硝子株式会社製、２５μｍ×１３ｍｍ）に変えた以外は実施例１と同様に実施例２４の湿式法不織布を得た。
Example 24
The wet method nonwoven fabric of Example 24 is the same as Example 1 except that the glass fiber used for the wet nonwoven fabric is changed to one having a large fiber diameter (trade name: ECS25I-535K, manufactured by Nippon Electric Glass Co., Ltd., 25 μm × 13 mm). Got.
実施例２５
湿式不織布に使用するガラス繊維を繊維長の長いもの（商品名：ＣＳ２５Ｋ−８７１、日東紡績株式会社製、１３μｍ×２５ｍｍ）に変えた以外は実施例１と同様に実施例２５の湿式不織布を得た。
Example 25
A wet nonwoven fabric of Example 25 is obtained in the same manner as in Example 1 except that the glass fiber used for the wet nonwoven fabric is changed to one having a long fiber length (trade name: CS25K-871, manufactured by Nitto Boseki Co., Ltd., 13 μm × 25 mm). It was.
比較例１
パルパー分散タンク中の水に、ガラス繊維（商品名：ＥＣＳ１３Ｓ−５５２Ｉ、日本電気硝子株式会社製、１３μｍ×１３ｍｍ）、ＰＶＡバインダー繊維（商品名：ＶＰＢ１０７、株式会社クラレ製、１．０デシテックス×３ｍｍ）、ポリエステルバインダー繊維（商品名：ＴＡ０７Ｎ、帝人株式会社製、１．２デシテックス×５ｍｍ）を１５：２：１の比率で投入して１０分間混合分散した後、貯蔵タンクに送り、抄紙ヘッドタンクから坪量４５ｇ／ｍ２となるような抄造条件で、湿紙状態の単層構造の紙を抄造した。湿紙状態でプレスを行い、ヤンキードライヤーに当たるようにして乾燥し、坪量４５ｇ／ｍ２の単層構造の紙を得た。
Comparative Example 1
To the water in the pulper dispersion tank, glass fiber (trade name: ECS13S-552I, manufactured by Nippon Electric Glass Co., Ltd., 13 μm × 13 mm), PVA binder fiber (trade name: VPB107, manufactured by Kuraray Co., Ltd., 1.0 decitex × 3 mm) ), Polyester binder fiber (trade name: TA07N, manufactured by Teijin Ltd., 1.2 decitex x 5 mm) is added at a ratio of 15: 2: 1, mixed and dispersed for 10 minutes, then sent to a storage tank, and a papermaking head tank A paper having a single layer structure in a wet paper state was made under the paper making conditions such that the basis weight was 45 g / m 2 . The paper was pressed in a wet paper state and dried by hitting a Yankee dryer to obtain a single-layer paper having a basis weight of 45 g / m 2 .
液状バインダーとして、ポリビニルアルコール（商品名：ＰＶＡ−１１７、株式会社クラレ製）を水に分散して塗抹液を作製した。本塗抹液をサチュレータ塗工装置にて、上記単層構造の紙のヤンキードライヤー非接触面側から、付着量が乾燥質量５ｇ／ｍ２になるような条件で塗抹した後乾燥し、坪量５０ｇ／ｍ２の比較例１の湿式法不織布を得た。 As a liquid binder, polyvinyl alcohol (trade name: PVA-117, manufactured by Kuraray Co., Ltd.) was dispersed in water to prepare a smear solution. The smear solution is smeared with a saturator coating device from the non-contact surface side of the paper with the single-layer structure on the non-contact surface side so that the amount of adhesion becomes a dry mass of 5 g / m 2 and then dried, and the basis weight of 50 g / M 2 of wet method nonwoven fabric of Comparative Example 1 was obtained.
（塗液浸透性）
ＪＩＳ Ｌ１０９６に準じ、フラジール通気性の測定を行った。フラジール通気性が高い不織布ほど、ポリ塩化ビニル等の塗液浸透性が優れており、建材補強材として優れていると言える。なお、通気性試験機には（カトーテック株式会社製、商品名：ＫＥＳ−Ｆ８−ＡＰ１）を使用した。通気性は下記の度合いで評価した。
(Coating liquid permeability)
According to JIS L1096, fragile air permeability was measured. It can be said that the nonwoven fabric with higher Frazier permeability has better coating liquid permeability such as polyvinyl chloride, and is excellent as a building material reinforcing material. In addition, (the Kato Tech Co., Ltd. make, brand name: KES-F8-AP1) was used for the air permeability tester. The air permeability was evaluated according to the following degree.
「○」フラジール通気性が２００ｃｍ３／ｃｍ２・ｓ以上
「△」フラジール通気性が１５０ｃｍ３／ｃｍ２・ｓ以上２００ｃｍ３／ｃｍ２・ｓ未満
「×」フラジール通気性が１５０ｃｍ３／ｃｍ２・ｓ未満
“O” Frasile breathability is 200 cm 3 / cm 2 · s or more “Δ” Frasile breathability is 150 cm 3 / cm 2 · s or more and less than 200 cm 3 / cm 2 · s “×” Frasile breathability is 150 cm 3 / cm 2・ Less than s
（毛羽立ち）
幅５ｃｍの無機繊維シートの流れ方向を横切るように、表面、裏面それぞれを山にして折り目を付け、折り目の上にステンレス製の直径５ｃｍ、長さ４０ｃｍの円柱状ロールを転がし、折り目に発生した繊維の毛羽立ち本数を計測した。測定はｎ＝４で行い、平均値を示す。毛羽立ちは下記の度合いで評価した。
(Fluffing)
A crease was formed with the front and back surfaces as a mountain so as to cross the flow direction of the inorganic fiber sheet having a width of 5 cm, a stainless steel cylindrical roll having a diameter of 5 cm and a length of 40 cm was rolled on the crease, and the crease occurred. The number of fluffs of the fiber was measured. The measurement is performed at n = 4 and the average value is shown. The fuzz was evaluated as follows.
「○」毛羽の数が５本未満
「△」毛羽の数が５本以上１０本未満
「×」毛羽の数が１０本以上
The number of “○” fluff is less than 5 “△” The number of fluff is 5 or more and less than 10 “×” The number of fluff is 10 or more
（耐熱寸法安定性）
幅４０ｃｍ、流れ方向３０ｃｍの無機繊維シートの縦横の寸法を正確に測定し、温度が２００℃の乾燥機の中で１０分間熱をかけ、乾燥から取り出してから縦横の寸法を測定した。測定はｎ＝４で行い、寸法変化率を平均値で示す。耐熱寸法変化は下記の度合いで評価した。
(Heat-resistant dimensional stability)
The vertical and horizontal dimensions of the inorganic fiber sheet having a width of 40 cm and a flow direction of 30 cm were accurately measured, heated for 10 minutes in a dryer having a temperature of 200 ° C., taken out from the drying, and then measured in the vertical and horizontal dimensions. The measurement is performed at n = 4, and the dimensional change rate is shown as an average value. The heat resistant dimensional change was evaluated by the following degree.
「○」寸法変化率が０．０２％未満
「△」寸法変化率が０．０２％以上０．１％未満
「×」寸法変化率が０．１％以上
"○" Dimensional change rate is less than 0.02% "△" Dimensional change rate is 0.02% or more and less than 0.1% "X" Dimensional change rate is 0.1% or more
（引張強度）
ＪＩＳ Ｐ８１１３：２００６に準じ、引張強度の測定を行った。なお、引張試験機には（日本Ａ＆Ｄ社製、商品名：テンシロンＵＴＭ−III−１００型）を使用した。引張強度は下記の度合いで評価した。
(Tensile strength)
The tensile strength was measured according to JIS P8113: 2006. In addition, (Japan A & D company make, brand name: Tensilon UTM-III-100 type) was used for the tensile tester. The tensile strength was evaluated according to the following degree.
「○」引張強度が２．９ｋＮ／ｍ以上
「△」引張強度が２．０ｋＮ／ｍ以上２．９ｋＮ／ｍ未満
「×」引張強度が２．０ｋＮ未満
“◯” Tensile strength is 2.9 kN / m or more “△” Tensile strength is 2.0 kN / m or more and less than 2.9 kN / m “X” Tensile strength is less than 2.0 kN
実施例１と比較例１の湿式法不織布は、不織布全体における繊維の種類、各繊維の含有率、液状バインダーの付着量、坪量が同じであり、表面温度１００℃以上のヤンキードライヤーでバインダー繊維を溶解する工程を含む製造方法によって、製造されている。実施例１と比較例１から、無機繊維と湿熱接着性バインダー繊維が含まれる層と熱融着性バインダー繊維が含まれる層の二層で構成されている実施例１の湿式法不織布は、単層抄きである比較例１の湿式法不織布と比較して、フラジール通気度が高く、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となり、そのため、建材用中間補強材として使用が可能である。比較例１においては、湿式法不織布全体の配合は実施例１と同じであるものの、単層抄きとなっており、裏面の毛羽立ちを抑制する熱融着性バインダー繊維が不織布全体に分散するため不足してしまい、毛羽が立ちやすくなるという結果となった。これにより建材用補強材として加工する際にロールに繊維が付着し、不備が発生した。 The wet method nonwoven fabrics of Example 1 and Comparative Example 1 have the same fiber type, the content of each fiber, the amount of liquid binder attached, and the basis weight of the nonwoven fabric as a whole. It is manufactured by the manufacturing method including the process of melt | dissolving. From Example 1 and Comparative Example 1, the wet method nonwoven fabric of Example 1, which is composed of two layers of a layer containing inorganic fibers and wet heat adhesive binder fibers and a layer containing heat fusible binder fibers, Compared with the wet method nonwoven fabric of Comparative Example 1 which is layered, the Frazier air permeability is high, and the tensile strength, fluffing, and heat-resistant dimensional stability are also good, so it can be used as an intermediate reinforcing material for building materials. Is possible. In Comparative Example 1, the composition of the whole wet process nonwoven fabric is the same as in Example 1, but it is a single-layer paper, because the heat-fusible binder fiber that suppresses fuzz on the back surface is dispersed throughout the nonwoven fabric. As a result, it became insufficient, and it became easier for fluff to stand. As a result, when processing as a reinforcing material for building materials, fibers adhered to the roll, and deficiencies occurred.
実施例１〜７から、表面層を構成する全繊維に対し、湿熱接着性バインダー繊維の含有率が２０質量％以下であり、裏面層を構成する全繊維に対し、熱融着性バインダー繊維の含有率が３０質量％以上である実施例１〜３、６、７においては、フラジール通気度が高く、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となった。実施例１〜３、６、７と比較して、実施例４においては、表面層の湿熱接着性バインダー繊維が多く、無機繊維の含有率が減少したため、耐熱寸法安定性が悪化する傾向が見られた。実施例５においては、裏面層の熱融着性バインダー繊維が減少し、毛羽立ちを抑制する効果が少なくなったため、毛羽立ちが１０本／５ｃｍ以上発生するようになった。 From Examples 1 to 7, the content of the wet heat adhesive binder fiber is 20% by mass or less with respect to all the fibers constituting the surface layer, and the heat fusible binder fiber with respect to all the fibers constituting the back layer. In Examples 1 to 3, 6 and 7 having a content of 30% by mass or more, the Frazier permeability was high, and the tensile strength, fluffing, and heat-resistant dimensional stability were also good. Compared with Examples 1-3, 6, and 7, in Example 4, the surface layer has a large amount of wet and heat-adhesive binder fibers, and the content of inorganic fibers has decreased, so the heat-resistant dimensional stability tends to deteriorate. It was. In Example 5, since the heat-fusible binder fiber in the back layer was reduced and the effect of suppressing fuzz was reduced, fuzz was generated at 10/5 cm or more.
実施例８〜１７から、表面層の坪量が１８〜９８ｇ／ｍ２であり、裏面層の坪量が１〜１０ｇ／ｍ２であり、液状バインダーの付着量が１〜１０ｇ／ｍ２であり、且つ不織布全体の坪量が２０〜１００ｇ／ｍ２である実施例８、１０、１１、１３、１５、１７においては、フラジール通気度が高く、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となった。実施例８、１０、１１、１３、１５、１７と比較して、実施例９においては、不織布全体の坪量が小さいため、引張強度が弱くなる傾向が見られた。実施例１２においては、不織布全体の坪量は大きいものの、空隙を構成する無機繊維の量が少なくなり、液状バインダーが空隙を塞ぐため、通気度が１５０ｃｍ３／ｃｍ２・ｓよりも低くなることで、建材加工する際に塗液の浸透性が悪くなる傾向が見られた。実施例１４においては、裏面層の坪量が小さいため、毛羽立ちを抑制する効果が低くなり、毛羽が１０本／５ｃｍ以上発生する傾向にあった。実施例１６においては、液状バインダーの付着量が少ないため、強度が低下する傾向が見られた。 From Examples 8 to 17, the basis weight of the surface layer is 18 to 98 g / m 2 , the basis weight of the back layer is 1 to 10 g / m 2 , and the adhesion amount of the liquid binder is 1 to 10 g / m 2 . In Examples 8, 10, 11, 13, 15, and 17 where the basis weight of the entire nonwoven fabric is 20 to 100 g / m 2 , the Frazier air permeability is high, and the tensile strength, fluffing, and heat-resistant dimensional stability are also good. As a result. Compared with Examples 8, 10, 11, 13, 15, and 17, in Example 9, since the basis weight of the whole nonwoven fabric was small, the tendency for tensile strength to become weak was seen. In Example 12, although the basis weight of the whole nonwoven fabric is large, the amount of inorganic fibers constituting the voids is reduced, and the liquid binder closes the voids, so that the air permeability is lower than 150 cm 3 / cm 2 · s. And when building materials were processed, there was a tendency that the permeability of the coating liquid deteriorated. In Example 14, since the basis weight of the back layer was small, the effect of suppressing fuzz was reduced, and there was a tendency for fuzz to be generated at 10/5 cm or more. In Example 16, since the adhesion amount of the liquid binder was small, there was a tendency for the strength to decrease.
実施例１８〜２１から、無機繊維が不織布全体の６０質量％以上であり、セルロース繊維を少量配合している実施例１８、２０においては、フラジール通気度が高く、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となった。実施例１８、２０と比較して、実施例１９においては、無機繊維が少なくなり、セルロース繊維を多く配合していることから、空隙が少なくなるため、フラジール通気度が１５０ｃｍ３／ｃｍ２・ｓよりも低くなり、また、セルロース繊維は熱によって変形しやすいため、耐熱寸法安定性も悪化する傾向が見られた。実施例２１においても、実施例１９と同様の理由でフラジール通気度が１５０ｃｍ３／ｃｍ２・ｓよりも低くなり、耐熱寸法安定性も悪化する傾向が見られた。 From Examples 18 to 21, in Examples 18 and 20 in which the inorganic fiber is 60% by mass or more of the whole nonwoven fabric and a small amount of cellulose fiber is blended, the Frazier air permeability is high, the tensile strength, the fluffing, and the heat resistant dimensional stability. The result was also good. Compared with Examples 18 and 20, in Example 19, since inorganic fibers are reduced and a large amount of cellulose fiber is blended, the voids are reduced, so that the Frazier air permeability is 150 cm 3 / cm 2 · s. In addition, since the cellulose fibers are easily deformed by heat, the heat-resistant dimensional stability tends to deteriorate. Also in Example 21, the Frazier air permeability was lower than 150 cm 3 / cm 2 · s for the same reason as in Example 19, and the heat resistant dimensional stability tended to deteriorate.
実施例２２、２３から、表面層と裏面層の坪量比率が３〜２００：１である実施例２２においてはフラジール通気量が高く、塗工性に優れ、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となった。実施例２２と比較して、実施例２３においては、不織布全体の無機繊維の比率が低くなるため、耐熱寸法安定性が悪化する傾向が見られた。 From Examples 22 and 23, in Example 22 in which the basis weight ratio of the front surface layer and the back surface layer is 3 to 200: 1, the fragile air permeability is high, the coating property is excellent, the tensile strength, the fluffing, and the heat resistant dimensional stability. The result was also good. Compared with Example 22, in Example 23, since the ratio of the inorganic fiber of the whole nonwoven fabric became low, the tendency for heat-resistant dimensional stability to deteriorate was seen.
実施例１、実施例２４、２５から、不織布を構成するガラス繊維の平均繊維径が１〜２０μｍであり、且つ平均繊維長が１〜２０ｍｍである実施例１においては、フラジール通気量が高く、塗工性に優れ、引張強度、毛羽立ち、耐熱寸法安定性も良好であるという結果となった。実施例１と比較して、実施例２４においては、無機繊維長が２０ｍｍを超えており、地合が悪く、湿式抄紙機で使用する毛布に無機繊維が取られるため、毛羽立ちが悪化する傾向が見られた。実施例２５においては、無機繊維径が２０μｍを超えており、こちらも地合が悪く、毛布に無機繊維が取られるため、毛羽立ちが悪化する傾向が見られた。 From Example 1 and Examples 24 and 25, the glass fiber constituting the nonwoven fabric has an average fiber diameter of 1 to 20 μm and an average fiber length of 1 to 20 mm. As a result, the coating property was excellent, and the tensile strength, fluffing, and heat-resistant dimensional stability were also good. Compared to Example 1, in Example 24, the inorganic fiber length exceeds 20 mm, the formation is poor, and the inorganic fibers are taken into the blanket used in the wet paper machine, and therefore the fluff tends to deteriorate. It was seen. In Example 25, since the inorganic fiber diameter exceeded 20 μm, the texture was also poor, and the inorganic fibers were taken on the blanket, so that the tendency of fuzzing to deteriorate was observed.
本発明の活用例として、通気度が大きいため、塗液の浸透性に優れ、寸法安定性を有し、毛羽が立ちにくく面質に優れ、加工の際に断紙しづらい強度を持つ建材用中間基材等が挙げられる。 As an application example of the present invention, because of its high air permeability, it has excellent coating liquid permeability, dimensional stability, excellent fluff resistance, excellent surface quality, and strength that makes it difficult to break paper during processing. An intermediate base material etc. are mentioned.
１ 表面
２ 裏面
３ 無機繊維と湿熱接着性バインダー繊維が含まれる層
４ 熱融着性バインダー繊維が含まれる層
５ 無機繊維
DESCRIPTION OF SYMBOLS 1 Front surface 2 Back surface 3 Layer in which inorganic fiber and wet heat adhesive binder fiber are contained 4 Layer in which heat-fusible binder fiber is contained Inorganic fiber
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013224479A JP6257265B2 (en) | 2013-10-29 | 2013-10-29 | Wet process nonwoven fabric and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013224479A JP6257265B2 (en) | 2013-10-29 | 2013-10-29 | Wet process nonwoven fabric and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2015086477A JP2015086477A (en) | 2015-05-07 |
| JP6257265B2 true JP6257265B2 (en) | 2018-01-10 |
Family
ID=53049593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013224479A Active JP6257265B2 (en) | 2013-10-29 | 2013-10-29 | Wet process nonwoven fabric and its manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6257265B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101720109B1 (en) * | 2016-06-17 | 2017-03-27 | (주)크린앤사이언스 | Filter media consisting of the wet non-woven fabric and its manufacturing method |
| KR102272890B1 (en) * | 2019-03-04 | 2021-07-05 | 주식회사 한국카본 | Glass paper with improved workabillity and manufacturing method of the same |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3468994B2 (en) * | 1996-07-30 | 2003-11-25 | 三菱製紙株式会社 | Glass fiber blend coated paper |
| JP4512242B2 (en) * | 2000-08-23 | 2010-07-28 | タピルス株式会社 | Air cleaning filter |
| JP2004084092A (en) * | 2002-08-23 | 2004-03-18 | Oribesuto Kk | Nonwoven fabric, method for producing the same and synthetic resin laminate material containing the same as substrate |
| JP2006059699A (en) * | 2004-08-20 | 2006-03-02 | Toyota Motor Corp | Manufacturing method of catalyst carrying diffusion layer, and manufacturing method of membrane electrode assembly |
| JP2009228138A (en) * | 2008-03-19 | 2009-10-08 | Mitsubishi Paper Mills Ltd | Glass fiber nonwoven fabric for backing |
| JP2013052324A (en) * | 2011-09-01 | 2013-03-21 | Mitsubishi Paper Mills Ltd | Composite filter medium and method for manufacturing the same |
-
2013
- 2013-10-29 JP JP2013224479A patent/JP6257265B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015086477A (en) | 2015-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20020153110A1 (en) | Multi-layer paper peelable into at least two thin sheets | |
| CA2770994C (en) | Fibrous structures and method for making same | |
| JP6018498B2 (en) | Lithium ion secondary battery separator base material, method for producing lithium ion secondary battery separator base material, and lithium ion secondary battery separator | |
| JP4722222B2 (en) | Cosmetic sheet and method for producing the same | |
| US10066342B2 (en) | Wet-laid nonwoven including thermoplastic fiber | |
| JP6257265B2 (en) | Wet process nonwoven fabric and its manufacturing method | |
| JP5841507B2 (en) | Base fabric for foamed plastic heat insulating surface material and method for producing the same | |
| JP5829550B2 (en) | Non-woven fabric for wallpaper backing | |
| JP6088392B2 (en) | Nonwoven fabric for wallpaper | |
| JP2014000718A (en) | Composite sheet for building component and building component | |
| JP4424541B2 (en) | Method for producing hydrolytic paper and hydrolytic paper | |
| JP2017089042A (en) | Unwoven fiber for wall paper backing | |
| JP4999906B2 (en) | Laminated paper | |
| JP2009000858A (en) | Incombustible laminated nonwoven fabric | |
| JP2001030395A (en) | Laminated processed paper | |
| JP6124747B2 (en) | Nonwoven fabric for wallpaper | |
| JP6016769B2 (en) | Nonwoven fabric and method for producing nonwoven fabric | |
| JP7475356B2 (en) | Liquid application cloths, liquid application kits, liquid application sheets, and liquid application tools | |
| CN214736520U (en) | Spunlace composite non-woven fabric with high liquid absorption and high friction force | |
| JP5466628B2 (en) | Cleaning sheet base material for electrophotographic apparatus | |
| JP2017137686A (en) | Backing paper for floor material | |
| JP2010084251A (en) | Printing nonwoven fabric | |
| JP6545638B2 (en) | Heat resistant wet non-woven | |
| JP2021110070A (en) | Nonwoven fabric for printing | |
| JP6266547B2 (en) | Non-woven fabric for wallpaper backing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20151126 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20161118 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20161213 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20170209 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20170620 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20170720 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20171107 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20171205 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6257265 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |