JP2021053554A - Method for manufacturing bad smell adsorption sheet, and bad smell adsorption sheet - Google Patents
Method for manufacturing bad smell adsorption sheet, and bad smell adsorption sheet Download PDFInfo
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 48
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 8
- 241001330002 Bambuseae Species 0.000 claims abstract description 83
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 78
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 78
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 78
- 239000011425 bamboo Substances 0.000 claims abstract description 78
- 239000000835 fiber Substances 0.000 claims abstract description 78
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 20
- 230000008961 swelling Effects 0.000 claims abstract description 15
- 238000004898 kneading Methods 0.000 claims abstract description 12
- 229920002488 Hemicellulose Polymers 0.000 claims abstract description 5
- 210000002421 cell wall Anatomy 0.000 claims abstract description 5
- 229920002678 cellulose Polymers 0.000 claims abstract description 5
- 239000001913 cellulose Substances 0.000 claims abstract description 5
- 229920005610 lignin Polymers 0.000 claims abstract description 5
- 238000010298 pulverizing process Methods 0.000 claims abstract 4
- 229920005989 resin Polymers 0.000 claims description 39
- 239000011347 resin Substances 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 16
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 238000009792 diffusion process Methods 0.000 claims description 10
- 239000011162 core material Substances 0.000 claims description 8
- 229920005992 thermoplastic resin Polymers 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 235000018167 Reynoutria japonica Nutrition 0.000 claims description 5
- 240000001341 Reynoutria japonica Species 0.000 claims description 5
- 235000003570 Phyllostachys pubescens Nutrition 0.000 claims description 3
- 244000302661 Phyllostachys pubescens Species 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract description 22
- 210000001519 tissue Anatomy 0.000 abstract description 4
- 210000004872 soft tissue Anatomy 0.000 abstract description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 42
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 28
- 235000019645 odor Nutrition 0.000 description 28
- 229910021529 ammonia Inorganic materials 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000001000 micrograph Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
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Abstract
Description
本発明は、竹繊維チョップドストランドの微粉末を用いた臭気吸着シートの製造方法及び臭気吸着シートに関する。 The present invention relates to a method for producing an odor adsorption sheet using a fine powder of bamboo fiber chopped strand, and an odor adsorption sheet.
特許文献１は、吸水部に竹粉を入れて、防臭・防菌機能をもたせた生理用ナプキンや紙おむつを提案している。
特許文献２及び特許文献３は、竹繊維を主体とした繊維を樹脂バインダーで結着する繊維シートを提案している。
Patent Document 2 and
アンモニアや酢酸などの臭気の吸着性能を高めるためには、竹繊維表面に多数の細孔を持たせ、更に吸着表面積を増加させるように繊維に担持させることが有効であるが、特許文献１では、竹繊維表面に多数の細孔を持たせることや、吸着表面積を増加させることを開示していない。
特許文献２及び特許文献３では、樹脂に竹繊維を担持させることが開示されているが、剛性の高い繊維シートを得ることを目的としており、竹繊維表面に多数の細孔を持たせることや、吸着表面積を増加させることを開示していない。
In order to enhance the adsorption performance of odors such as ammonia and acetic acid, it is effective to have a large number of pores on the surface of the bamboo fiber and to support the fiber so as to further increase the adsorption surface area. , It does not disclose that the surface of bamboo fibers has a large number of pores or increases the adsorption surface area.
本発明は、竹繊維表面に多数の細孔を持たせることができ、細孔を有する微粉末を不織布に効果的に担持させることで吸着表面積を増加させることができる臭気吸着シートの製造方法、及び臭気の吸着性能の高い臭気吸着シートを提供することを目的とする。 The present invention is a method for producing an odor adsorption sheet, which can have a large number of pores on the surface of bamboo fibers and can increase the adsorption surface area by effectively supporting fine powder having pores on a non-woven fabric. An object of the present invention is to provide an odor adsorption sheet having high odor adsorption performance.
請求項１記載の本発明の臭気吸着シートの製造方法は、孟宗竹、和竹、笹竹等の竹材を所要の小片に破砕する破砕工程と、前記破砕工程で破砕した前記小片の前記竹材を、加圧押出装置により少なくともその内部圧力が１５Ｋｇ／ｃｍ2以上で加圧混練する加圧混練工程と、前記加圧混練工程で加圧混練した前記竹材を、カッターで裁断してミンチ状にして多孔なノズルより大気中に吐出する膨潤拡散工程と、を有し、前記膨潤拡散工程によって、膨潤拡散して硬組織と柔組織とを解体し、細胞壁を形成するセルロース及びヘミセルロースをリグニンより解離させた解繊状の竹繊維チョップドストランドとし、前記竹繊維チョップドストランドを、平均粒径が２０μｍ〜５００μｍの微粉末に粉砕する粉砕工程と、前記粉砕工程で粉砕した前記竹繊維チョップドストランドの前記微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が２０μｍ〜５０μｍの不織布に担持させる担持工程とを有することを特徴とする。
請求項２記載の本発明は、請求項１に記載の臭気吸着シートの製造方法において、前記不織布が、芯材として第１樹脂を用い、前記第１樹脂よりも融点の低い第２樹脂で前記第１樹脂の表面を覆っていることを特徴とする。
請求項３記載の本発明は、請求項１又は請求項２に記載の臭気吸着シートの製造方法において、前記担持工程では、加熱によって前記竹繊維チョップドストランドの前記微粉末を前記不織布に担持させることを特徴とする。
請求項４記載の本発明の臭気吸着シートは、平均粒径２０μｍ〜５００μｍの竹繊維チョップドストランドの微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が前記竹繊維チョップドストランドの前記微粉末の前記平均粒径以下の不織布に担持させたことを特徴とする。
請求項５記載の本発明は、請求項４に記載の臭気吸着シートにおいて、前記不織布が、芯材として第１樹脂を用い、前記第１樹脂よりも融点の低い第２樹脂で前記第１樹脂の表面を覆っていることを特徴とする。
The method for producing an odor adsorbing sheet according to
The present invention according to claim 2 is the method for producing an odor adsorption sheet according to
According to the third aspect of the present invention, in the method for producing an odor adsorption sheet according to the first or second aspect, in the supporting step, the fine powder of the bamboo fiber chopped strand is supported on the non-woven fabric by heating. It is characterized by.
The odor adsorption sheet of the present invention according to
According to the fifth aspect of the present invention, in the odor adsorption sheet according to the fourth aspect, the nonwoven fabric uses a first resin as a core material, and is a second resin having a melting point lower than that of the first resin. It is characterized by covering the surface of the plastic.
本発明は、竹繊維表面に多数の細孔を持たせることができ、細孔を有する微粉末を不織布に効果的に担持させることで吸着表面積を増加させ、臭気の吸着性能を高めることができる。 According to the present invention, a large number of pores can be provided on the surface of bamboo fibers, and the adsorption surface area can be increased and the adsorption performance of odor can be enhanced by effectively supporting the fine powder having pores on the non-woven fabric. ..
本発明の第１の実施の形態による臭気吸着シートの製造方法は、孟宗竹、和竹、笹竹等の竹材を所要の小片に破砕する破砕工程と、破砕工程で破砕した小片の竹材を、加圧押出装置により少なくともその内部圧力が１５Ｋｇ／ｃｍ2以上で加圧混練する加圧混練工程と、加圧混練工程で加圧混練した竹材を、カッターで裁断してミンチ状にして多孔なノズルより大気中に吐出する膨潤拡散工程と、を有し、膨潤拡散工程によって、膨潤拡散して硬組織と柔組織とを解体し、細胞壁を形成するセルロース及びヘミセルロースをリグニンより解離させた解繊状の竹繊維チョップドストランドとし、竹繊維チョップドストランドを、平均粒径が２０μｍ〜５００μｍの微粉末に粉砕する粉砕工程と、粉砕工程で粉砕した竹繊維チョップドストランドの微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が２０μｍ〜５０μｍの不織布に担持させる担持工程とを有するものである。本実施の形態によれば、竹繊維表面に平均空孔径が１５μｍ〜３０μｍの多数の細孔を持たせることができ、細孔を有する微粉末を不織布に効果的に担持させることで吸着表面積を増加させることができ、アンモニア及び酢酸の吸着性能の高い臭気吸着シートを得ることができる。 The method for producing an odor adsorbing sheet according to the first embodiment of the present invention is a crushing step of crushing bamboo materials such as Meng Soutake, Japanese bamboo, and bamboo bamboo into required small pieces, and pressurizing the small pieces of bamboo material crushed in the crushing step. The pressure kneading process in which the internal pressure is at least 15 kg / cm 2 or more by an extruder and the bamboo material pressure kneaded in the pressure kneading process are cut with a cutter to make minced meat and air from a porous nozzle. It has a swelling and diffusion process that discharges into it, and by the swelling and diffusion process, it swells and diffuses to disassemble the hard tissue and soft tissue, and the cellulose and hemicellulose that form the cell wall are dissociated from the lignin. A crushing step of crushing bamboo fiber chopped strands into fine powders having an average particle size of 20 μm to 500 μm and fine powders of bamboo fiber chopped strands crushed in the crushing step are made of a thermoplastic resin at least on the surface. It has a supporting step of supporting it on a non-woven fabric having an average fiber diameter of 20 μm to 50 μm. According to the present embodiment, the surface of the bamboo fiber can have a large number of pores having an average pore diameter of 15 μm to 30 μm, and the fine powder having the pores is effectively supported on the non-woven fabric to increase the adsorption surface area. It can be increased, and an odor adsorption sheet having high adsorption performance of ammonia and acetic acid can be obtained.
本発明の第２の実施の形態は、第１の実施の形態による臭気吸着シートの製造方法において、不織布が、芯材として第１樹脂を用い、第１樹脂よりも融点の低い第２樹脂で第１樹脂の表面を覆っているものである。本実施の形態によれば、竹繊維チョップドストランドの微粉末を担持させやすい。 In the second embodiment of the present invention, in the method for producing an odor adsorption sheet according to the first embodiment, the non-woven fabric is a second resin having a melting point lower than that of the first resin, using the first resin as the core material. It covers the surface of the first resin. According to this embodiment, it is easy to support the fine powder of bamboo fiber chopped strands.
本発明の第３の実施の形態は、第１又は第２の実施の形態による臭気吸着シートの製造方法において、担持工程では、加熱によって竹繊維チョップドストランドの微粉末を不織布に担持させるものである。本実施の形態によれば、竹繊維チョップドストランドの微粉末の細孔構造を維持して担持させることができる。 In the third embodiment of the present invention, in the method for producing an odor adsorption sheet according to the first or second embodiment, in the supporting step, fine powder of bamboo fiber chopped strands is supported on a non-woven fabric by heating. .. According to this embodiment, the pore structure of the fine powder of bamboo fiber chopped strand can be maintained and supported.
本発明の第４の実施の形態による臭気吸着シートは、平均粒径２０μｍ〜５００μｍの竹繊維チョップドストランドの微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が竹繊維チョップドストランドの微粉末の平均粒径以下の不織布に担持させたものである。本実施の形態によれば、細孔を有する微粉末を不織布に効果的に担持させることができ、アンモニア及び酢酸の吸着性能に優れている。 The odor adsorption sheet according to the fourth embodiment of the present invention is a fine powder of bamboo fiber chopped strands having an average particle size of 20 μm to 500 μm, and a fine powder of bamboo fiber chopped strands having at least a surface made of a thermoplastic resin and having an average fiber diameter of bamboo fiber chopped strands. It is supported on a non-woven fabric having an average particle size or less. According to this embodiment, the fine powder having pores can be effectively supported on the non-woven fabric, and the adsorption performance of ammonia and acetic acid is excellent.
本発明の第５の実施の形態は、第４の実施の形態による臭気吸着シートにおいて、不織布が、芯材として第１樹脂を用い、第１樹脂よりも融点の低い第２樹脂で第１樹脂の表面を覆っているものである。本実施の形態によれば、竹繊維チョップドストランドの微粉末を担持させやすい。 In the fifth embodiment of the present invention, in the odor adsorption sheet according to the fourth embodiment, the non-woven fabric uses the first resin as the core material, and the second resin having a melting point lower than that of the first resin is the first resin. It covers the surface of the plastic. According to this embodiment, it is easy to support the fine powder of bamboo fiber chopped strands.
図１は本発明の一実施例による臭気吸着シートの製造方法を示すフローチャートである。
まず、解繊状の竹繊維チョップドストランドを製造する。
竹材には、例えば、孟宗竹、和竹、又は笹竹を用いる。
FIG. 1 is a flowchart showing a method for manufacturing an odor adsorption sheet according to an embodiment of the present invention.
First, a defibrated bamboo fiber chopped strand is produced.
As the bamboo material, for example, Moso bamboo, Japanese bamboo, or bamboo bamboo is used.
ステップ１として、伐採した、孟宗竹、和竹、又は笹竹等の竹材を、２０ｃｍ〜５０ｃｍ程度の所要の小片に破砕する。
ステップ１における破砕工程で破砕した小片の竹材を、加圧押出装置により、少なくともその内部圧力が１５Ｋｇ／ｃｍ2以上で加圧混練する（ステップ２）。混練にはスクリューを用いることができる。
竹材の種類によって、硬さが異なるため、竹種により内部圧力を調整することが好ましい。例えば、笹竹では、少なくとも１５Ｋｇ／ｃｍ2以上、孟宗竹では３０Ｋｇ／ｃｍ2〜５０Ｋｇ／ｃｍ2とする。
ステップ２における加圧混練工程で加圧混練した竹材は、カッターで２０ｍｍ〜２００ｍｍの長さに裁断してミンチ状にして多孔なノズルより大気中に吐出する（ステップ３）。
ステップ３における膨潤拡散工程によって、竹材は、硬組織と柔組織とに解体され、細胞壁を形成するセルロース及びヘミセルロースをリグニンより解離させた解繊状の竹繊維チョップドストランドを得ることができる。
膨潤拡散工程によって得られた解繊状の竹繊維チョップドストランドの大きさの割合は、３ｍｍ以下が７３％、３ｍｍ〜５ｍｍが１７％、５ｍｍ〜７ｍｍが５％、７ｍｍ以上が５％である。
As
The small pieces of bamboo material crushed in the crushing step in
Since the hardness differs depending on the type of bamboo material, it is preferable to adjust the internal pressure depending on the type of bamboo. For example, in Sasatake, at least 15 Kg / cm 2 over, the bamboo and 30Kg / cm 2 ~50Kg / cm 2 .
The bamboo material pressure-kneaded in the pressure-kneading step in step 2 is cut into a length of 20 mm to 200 mm with a cutter, minced, and discharged into the atmosphere from a porous nozzle (step 3).
By the swelling and diffusion step in
The size ratio of the defibrated bamboo fiber chopped strands obtained by the swelling / diffusion step is 73% for 3 mm or less, 17% for 3 mm to 5 mm, 5% for 5 mm to 7 mm, and 5% for 7 mm or more.
ステップ３における膨潤拡散工程によって吐出された竹繊維チョップドストランドを、平均粒径が２０μｍ〜５００μｍの微粉末に粉砕する（ステップ４）。
ステップ４における粉砕工程で粉砕した竹繊維チョップドストランドの微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が２０μｍ〜５０μｍの不織布に担持させる（ステップ５）。なお、不織布としては、芯材として第１樹脂を用い、第１樹脂よりも融点の低い第２樹脂で第１樹脂の表面を覆っているものが好ましい。
ステップ５における担持工程では、竹繊維チョップドストランドの微粉末を不織布に塗布し、竹繊維チョップドストランドの微粉末を塗布した不織布を加熱する。加熱温度は、不織布の繊維表面を覆う樹脂の溶融温度とする。芯材として第１樹脂を用い、不織布の繊維が、第１樹脂よりも融点の低い第２樹脂で第１樹脂の表面を覆っている場合には、第２樹脂の溶融温度以上で、第１樹脂の溶融温度より低い加熱温度とする。加熱後に冷却することで、不織布の繊維間に竹繊維チョップドストランドの微粉末が担持される。
The bamboo fiber chopped strand discharged by the swelling / diffusion step in
The fine powder of bamboo fiber chopped strands crushed in the crushing step in
In the supporting step in step 5, the fine powder of bamboo fiber chopped strands is applied to the non-woven fabric, and the non-woven fabric coated with the fine powder of bamboo fiber chopped strands is heated. The heating temperature is the melting temperature of the resin covering the fiber surface of the non-woven fabric. When the first resin is used as the core material and the fibers of the non-woven fabric cover the surface of the first resin with the second resin having a melting point lower than that of the first resin, the first resin is at a melting temperature of the second resin or higher. The heating temperature is lower than the melting temperature of the resin. By cooling after heating, fine powder of bamboo fiber chopped strands is supported between the fibers of the non-woven fabric.
以上のように本実施例によれば、竹繊維表面に平均空孔径が１５μｍ〜３０μｍの多数の細孔を持たせることができ、細孔を有する微粉末を不織布に効果的に担持させることができ、アンモニア及び酢酸の吸着性能の高い臭気吸着シートを得ることができる。
また、本実施例によれば、竹繊維チョップドストランドの微粉末の細孔構造を維持して担持させることができる。
As described above, according to the present embodiment, the surface of the bamboo fiber can have a large number of pores having an average pore diameter of 15 μm to 30 μm, and the fine powder having the pores can be effectively supported on the non-woven fabric. It is possible to obtain an odor adsorption sheet having high adsorption performance of ammonia and acetic acid.
Further, according to this embodiment, the pore structure of the fine powder of bamboo fiber chopped strand can be maintained and supported.
図２は本発明の実施例１による臭気吸着シートの効果を示すグラフである。
図２（ａ）は平均粒径が１００μｍの竹繊維チョップドストランドの微粉末を不織布に担持させる前の比較例１であり、図２（ｂ）は平均粒径が１００μｍの竹繊維チョップドストランドの微粉末を不織布に担持した実施例１である。
FIG. 2 is a graph showing the effect of the odor adsorption sheet according to the first embodiment of the present invention.
FIG. 2A shows Comparative Example 1 before supporting the fine powder of bamboo fiber chopped strands having an average particle size of 100 μm on the non-woven fabric, and FIG. 2B shows the fine powder of bamboo fiber chopped strands having an average particle size of 100 μm. This is Example 1 in which the powder is supported on a non-woven fabric.
不織布には、第１樹脂をポリプロピレン、第２樹脂をポリエチレンとした平均繊維径が３０μｍの繊維を用いている。
試験は、サンプリングバッグに試料とともに臭気成分を含むガスを封入し、２時間後にガス採取器を用いて臭気濃度を計測した。
比較例１及び実施例１に用いた試料面積は４５０ｃｍ２であり、臭気成分として、アンモニア、酢酸、及びメチルメルカプタンを用いた。
アンモニアの初発濃度は１２０ｐｐｍ、酢酸の初発濃度は３０ｐｐｍ、及びメチルメルカプタンの初発濃度は１０ｐｐｍであった。
As the non-woven fabric, fibers having an average fiber diameter of 30 μm, in which the first resin is polypropylene and the second resin is polyethylene, are used.
In the test, a sampling bag was filled with a gas containing an odor component together with the sample, and after 2 hours, the odor concentration was measured using a gas sampler.
The sample area used in Comparative Example 1 and Example 1 was 450 cm 2 , and ammonia, acetic acid, and methyl mercaptan were used as odor components.
The initial concentration of ammonia was 120 ppm, the initial concentration of acetic acid was 30 ppm, and the initial concentration of methyl mercaptan was 10 ppm.
比較例１は、２時間経過後では、アンモニアが７８ｐｐｍ、酢酸濃度が１３ｐｐｍ、メチルメルカプタンが１０ｐｐｍであった。
実施例１は、２時間経過後では、アンモニアが２２ｐｐｍ、酢酸濃度が２ｐｐｍ、メチルメルカプタンが１０ｐｐｍであった。
従って、比較例１は、図２（ａ）に示すように、アンモニアが２２％、酢酸が４８％、メチルメルカプタンが０％の減少率であった。
これに対して、実施例１は、図２（ｂ）に示すように、アンモニアが７８％、酢酸が９２％、メチルメルカプタンが０％の減少率であった。
従って、不織布に竹繊維チョップドストランドの微粉末を担持させた実施例１では、不織布に担持させない比較例１に比較して、アンモニア及び酢酸に対する持続的な吸着性能を示した。
In Comparative Example 1, after 2 hours, ammonia was 78 ppm, acetic acid concentration was 13 ppm, and methyl mercaptan was 10 ppm.
In Example 1, after 2 hours, ammonia was 22 ppm, acetic acid concentration was 2 ppm, and methyl mercaptan was 10 ppm.
Therefore, in Comparative Example 1, as shown in FIG. 2A, the reduction rates of ammonia were 22%, acetic acid was 48%, and methyl mercaptan was 0%.
On the other hand, in Example 1, as shown in FIG. 2 (b), ammonia was reduced by 78%, acetic acid was reduced by 92%, and methyl mercaptan was reduced by 0%.
Therefore, in Example 1 in which the fine powder of bamboo fiber chopped strand was supported on the non-woven fabric, the sustained adsorption performance on ammonia and acetic acid was exhibited as compared with Comparative Example 1 in which the fine powder of bamboo fiber chopped strand was supported on the non-woven fabric.
図３は比較例２との対比を示す実施例１による臭気吸着シートの効果を示すグラフである。
図３に示す比較例２は、平均粒径が１０μｍの竹繊維チョップドストランドの微粉末を不織布に担持したものである。
比較例２で用いた不織布は、実施例１で用いた不織布と同一である。
比較例２は、アンモニアが１５％、酢酸が４５％の減少率であった。
FIG. 3 is a graph showing the effect of the odor adsorption sheet according to Example 1, which shows a comparison with Comparative Example 2.
In Comparative Example 2 shown in FIG. 3, fine powder of bamboo fiber chopped strand having an average particle size of 10 μm is supported on a non-woven fabric.
The non-woven fabric used in Comparative Example 2 is the same as the non-woven fabric used in Example 1.
In Comparative Example 2, the reduction rate of ammonia was 15% and that of acetic acid was 45%.
図４（ａ）は比較例２の顕微鏡写真、図４（ｂ）は実施例１の顕微鏡写真である。
図４（ａ）に示すように、比較例２では、竹繊維チョップドストランドの微粉末が不織布の繊維表面に凝集し、不織布の繊維全体を被覆し、微粉末の細孔を確認できない。
これに対して、図４（ｂ）に示すように、実施例１では、竹繊維チョップドストランドの微粉末が不織布の繊維の間に担持され、細孔を確認することができる。
FIG. 4A is a photomicrograph of Comparative Example 2, and FIG. 4B is a photomicrograph of Example 1.
As shown in FIG. 4A, in Comparative Example 2, the fine powder of the bamboo fiber chopped strand aggregates on the fiber surface of the non-woven fabric, covers the entire fiber of the non-woven fabric, and the pores of the fine powder cannot be confirmed.
On the other hand, as shown in FIG. 4B, in Example 1, fine powder of bamboo fiber chopped strands is supported between the fibers of the non-woven fabric, and pores can be confirmed.
以上のように、平均粒径２０μｍ〜５００μｍ、より好ましくは平均粒径２０μｍ〜１００μｍの竹繊維チョップドストランドの微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が竹繊維チョップドストランドの微粉末の平均粒径以下の不織布に担持させることで、細孔を有する微粉末を不織布に効果的に担持させることができ、不織布に担持させない竹繊維チョップドストランドの微粉末だけのものと比較しても吸着面積が格段に大きくなりアンモニア及び酢酸の吸着性能が優れる。なお、不織布の平均繊維径は２０μｍ〜５０μｍ、より好ましくは２０μｍ〜３０μｍである。また、不織布の平均繊維径は、竹繊維チョップドストランドの微粉末の平均粒径以下が好ましいが、チョップドストランドの微粉末の平均粒径の２．５倍以下、更には１．５倍以下であればアンモニア及び酢酸の吸着効果を期待できる。 As described above, fine powder of bamboo fiber chopped strands having an average particle size of 20 μm to 500 μm, more preferably 20 μm to 100 μm, and at least the surface of which is made of a thermoplastic resin and has an average fiber diameter of bamboo fiber chopped strands. By supporting the fine powder having pores on the non-woven fabric having an average particle size or less, the fine powder having pores can be effectively supported on the non-woven fabric, even when compared with the fine powder of bamboo fiber chopped strands which is not supported on the non-woven fabric. The adsorption area is remarkably large and the adsorption performance of ammonia and acetic acid is excellent. The average fiber diameter of the non-woven fabric is 20 μm to 50 μm, more preferably 20 μm to 30 μm. The average fiber diameter of the non-woven fabric is preferably 2.5 times or less, more preferably 1.5 times or less, the average particle size of the fine powder of bamboo fiber chopped strands. For example, the adsorption effect of ammonia and acetic acid can be expected.
本発明によれば、竹繊維チョップドストランドの微粉末をシートに担持させることで、吸着表面積が増え、脱臭機能を高めることができる。 According to the present invention, by supporting the fine powder of bamboo fiber chopped strand on the sheet, the adsorption surface area can be increased and the deodorizing function can be enhanced.
Ｓ１ 破砕工程
Ｓ２ 加圧混練工程
Ｓ３ 膨潤拡散工程
Ｓ４ 粉砕工程
Ｓ５ 担持工程
S1 Crushing step S2 Pressurized kneading step S3 Swelling and diffusion step S4 Crushing step S5 Supporting step
Claims (5)
前記破砕工程で破砕した前記小片の前記竹材を、加圧押出装置により少なくともその内部圧力が１５Ｋｇ／ｃｍ2以上で加圧混練する加圧混練工程と、
前記加圧混練工程で加圧混練した前記竹材を、カッターで裁断してミンチ状にして多孔なノズルより大気中に吐出する膨潤拡散工程と、
を有し、
前記膨潤拡散工程によって、膨潤拡散して硬組織と柔組織とを解体し、細胞壁を形成するセルロース及びヘミセルロースをリグニンより解離させた解繊状の竹繊維チョップドストランドとし、
前記竹繊維チョップドストランドを、平均粒径が２０μｍ〜５００μｍの微粉末に粉砕する粉砕工程と、
前記粉砕工程で粉砕した前記竹繊維チョップドストランドの前記微粉末を、少なくとも表面が熱可塑性樹脂からなり平均繊維径が２０μｍ〜５０μｍの不織布に担持させる担持工程と
を有する
ことを特徴とする臭気吸着シートの製造方法。 A crushing process that crushes bamboo materials such as Moso bamboo, Japanese bamboo, and bamboo bamboo into the required small pieces.
A pressure kneading step in which the small pieces of bamboo material crushed in the crushing step are pressure- kneaded by a pressure extruder at a pressure of at least 15 kg / cm 2 or more.
A swelling / diffusion step in which the bamboo material pressure-kneaded in the pressure-kneading step is cut with a cutter to be minced and discharged into the atmosphere from a porous nozzle.
Have,
By the swelling and diffusing step, the hard tissue and the parenchyma are disassembled by swelling and diffusing to obtain a defibrated bamboo fiber chopped strand in which cellulose and hemicellulose forming a cell wall are dissociated from lignin.
A pulverization step of pulverizing the bamboo fiber chopped strand into a fine powder having an average particle size of 20 μm to 500 μm, and
An odor adsorption sheet comprising a supporting step of supporting the fine powder of the bamboo fiber chopped strand crushed in the crushing step on a non-woven fabric having at least a surface made of a thermoplastic resin and an average fiber diameter of 20 μm to 50 μm. Manufacturing method.
ことを特徴とする請求項１に記載の臭気吸着シートの製造方法。 The odor adsorption sheet according to claim 1, wherein the non-woven fabric uses a first resin as a core material and covers the surface of the first resin with a second resin having a melting point lower than that of the first resin. Manufacturing method.
ことを特徴とする請求項１又は請求項２に記載の臭気吸着シートの製造方法。 The method for producing an odor-adsorbing sheet according to claim 1 or 2, wherein in the supporting step, the fine powder of the bamboo fiber chopped strand is supported on the non-woven fabric by heating.
ことを特徴とする臭気吸着シート。 A fine powder of bamboo fiber chopped strands having an average particle size of 20 μm to 500 μm was supported on a non-woven fabric having an average fiber diameter of at least the surface made of a thermoplastic resin and having an average fiber diameter equal to or less than the average particle size of the fine powder of the bamboo fiber chopped strands. An odor adsorption sheet characterized by.
ことを特徴とする請求項４に記載の臭気吸着シート。
The odor adsorption sheet according to claim 4, wherein the non-woven fabric uses a first resin as a core material and covers the surface of the first resin with a second resin having a melting point lower than that of the first resin. ..
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