WO2015133091A1 - Method for measuring powdered resin content of resin fiber mat, and method for determining powdered resin content of resin fiber mat - Google Patents
Method for measuring powdered resin content of resin fiber mat, and method for determining powdered resin content of resin fiber mat Download PDFInfo
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- WO2015133091A1 WO2015133091A1 PCT/JP2015/000939 JP2015000939W WO2015133091A1 WO 2015133091 A1 WO2015133091 A1 WO 2015133091A1 JP 2015000939 W JP2015000939 W JP 2015000939W WO 2015133091 A1 WO2015133091 A1 WO 2015133091A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
Definitions
- the present invention relates to a method for measuring the powder resin content of a resin fiber mat used in the manufacture of fiberboard and a method for determining the powder resin content of a resin fiber mat.
- the powder resin is easy to handle, can be easily mixed with plant fibers, can simplify the production process, has no uneven density, and has a peel strength and moisture absorption.
- a fiberboard having good dimensional stability can be produced.
- the vegetable fiber 1 is spread
- Measured value of each point obtained by analysis is based on the reflection spectrum, for example, the amount of reflection at a specific wavelength. Moreover, what was normalized so that the difference with the background of the vegetable fiber 1 may become clear, for example, the value based on the difference spectrum on the basis of the fiber mat produced without mix
- blending the powder resin 2 is used. It may be.
- Near-infrared reflected light data that has been separated by the near-infrared spectrometer 10 and output from the detector is input to a computer connected to the detector.
- the computer performs arithmetic processing such as making the difference spectrum with reference to the fiber mat produced without blending the powder resin 2 as necessary with respect to the data of the near-infrared reflected light. Thereafter, an average value or a total value of the near-infrared reflected light data of each point analyzed over a predetermined area is calculated, and this is used as an analysis value.
- a calibration curve between the content of the powder resin 2 of the resin fiber mat 8 and the analysis value (average value or total value) obtained in advance is stored as a graph or a relational expression.
- the content rate of the powder resin 2 can be calculated by collating the analytical value actually measured with the calibration curve. This result is output to an output device such as a display as necessary.
- FIG. Fig.2 (a) is a near-infrared reflection spectrum of the resin fiber mat manufactured by changing the content rate of powder resin. Specifically, four types of resin fiber mats in which the content ratio of the powder resin is 0%, 15%, 18%, and 30% in mass ratio in the entire resin fiber mat are used.
- the content rate of the powder resin in the resin fiber mat is calculated from the calibration curve acquired in advance based on the measured values of the near infrared reflected light as shown in FIGS. 2 (a) and 2 (b).
- the content ratio of the powder resin thus calculated can be obtained as the content ratio of the powder resin in the resin fiber mat.
- the content of the powder resin in the resin fiber mat made of a mixture of vegetable fiber and powder resin can be easily measured in-line. Further, since the average value or the total value analyzed over a predetermined area is used as a reference, it is possible to measure with high accuracy.
- the resin fiber mat 8 may be transported to a preheating step before the heating and pressurizing step or before the measurement of the powder resin content by near infrared light.
- the resin fiber mat 8 is conveyed into a heating device (not shown), and the resin fiber mat 8 is heated in the heating device, whereby the vegetable fiber 1 constituting the resin fiber mat 8 is powdered resin. 2 particles are fixed, and the handling of the resin fiber mat 8 is improved.
- This heating device includes a conveyor belt that conveys the resin fiber mat 8 and a heater such as a heater or hot air blower that heats the resin fiber mat 8 on the conveyor belt, and the resin conveyed by the conveyor belt.
- the fiber mat 8 is heated by a heater.
- the heating conditions in the preheating step are appropriately set according to the type of the powder resin 2, but when a thermosetting resin is used, it is preferably heated at a heating temperature of 60 to 120 ° C. for 5 to 10 minutes.
- a thermoplastic resin is used as the powder resin 2
- the powder resin 2 is brought into a molten state by setting the heating temperature to a temperature equal to or higher than the temperature at which the resin melts. For example, when powder resin 2 made of polypropylene is used, heating is performed at about 150 to 180 ° C.
- the powder resin 2 is transferred to the press molding process in a molten state, and is pressed into a plate shape. A fiberboard is formed.
- the resin fiber mat 8 is cold-pressed at a temperature at which the thermoplastic resin constituting the powder resin 2 is cured, thereby forming the resin fiber mat 8 and the powder resin 2 constituting the resin fiber mat 8. Is molded and cured to obtain a fiberboard.
- the pressing pressure and pressing time at this time affect the strength performance of the resulting fiberboard and the dimensional stability during moisture absorption, and preferably the pressing pressure is 1.96 to 4.90 MPa (20 to 50 kgf / cm 2). ), Press molding is performed under the condition of pressing time of 10 to 60 minutes. Further, the density of the fiberboard formed at this time is preferably 0.6 to 0.9 g / cm 3 .
- the fiberboard thus obtained has high strength characteristics and dimensional stability at the time of water absorption / moisture absorption, and should be suitably used for housing members, interior members, artificial members, etc. that require such performance. Can do.
- it can be suitably used for a surface material of a flash panel used for interior fittings such as a door panel, a sliding door, and a partition, or a floor material such as a flooring finish floor or a stair tread.
- a Soxhlet method can be considered as a method other than the method described above.
- the Soxhlet method is a method in which a resin fiber mat is immersed in acetone to extract a powder resin and dried to grasp the content of the powder resin.
- the content of the powder resin in the resin fiber mat obtained by the above measurement method is appropriate in light of predetermined acceptance criteria. Specifically, it is determined whether an average value or a total value, which is an analysis value obtained by irradiating the resin fiber mat with near infrared light, is within the reference range. This step can also be performed automatically by computer computing means.
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Provided are a method for measuring and a method for determining the powdered resin content of a resin fiber mat, with which the content of powdered resin in a resin fiber mat comprising a mixture of plant-based fibers and a powdered resin can be easily measured in-line. One surface of a resin fiber mat (8) of plant-based fibers (1) supplied with a powdered resin (2) and mixed therewith is irradiated with near-infrared light. Using a near-infrared spectrometer (10), reflected light from the resin fiber mat (8) is analyzed over a prescribed surface area of the one surface. An average value or sum value obtained by analysis over this prescribed surface area is cross-checked on the basis of the relationship between this average value or sum value over the prescribed surface area and a previously acquired value for content of powdered resin (2) in a resin fiber mat (8), and the content of the powdered resin (2) of a resin fiber mat (8) is calculated.
Description
本発明は、繊維板の製造に使用される樹脂繊維マットの粉末樹脂含有率の測定方法及び樹脂繊維マットの粉末樹脂含有率の判定方法に関する。
The present invention relates to a method for measuring the powder resin content of a resin fiber mat used in the manufacture of fiberboard and a method for determining the powder resin content of a resin fiber mat.
従来、植物性繊維を原材料とした繊維板が知られている。この繊維板は、ケナフやジュート等の植物の靱皮部分等から得られる植物性繊維を原材料として用い、これを樹脂で接着して得られるボードである。繊維板は、住宅用部材、内装部材、造作部材等として用いられている従来の木質板、例えばパーティクルボード（ＰＢ）、ＭＤＦ（中密度繊維板）等の木質板に比べて高強度で、かつ高い寸法安定性を有している。
Conventionally, fiberboards made from plant fibers are known. This fiberboard is a board obtained by using plant fibers obtained from bast portions of plants such as kenaf and jute as raw materials and bonding them with a resin. The fiberboard is higher in strength than a conventional wood board used as a house member, interior member, construction member, etc., for example, a wood board such as particle board (PB), MDF (medium density fiber board), and High dimensional stability.
繊維板を製造する際には、植物性繊維を解繊して不織布の繊維マットを成形する。そして繊維マットの成形時または成形後に接着用の樹脂を供給し、この樹脂を供給した樹脂繊維マットを加熱加圧成形する。
When manufacturing fiberboard, plant fiber is defibrated and a non-woven fiber mat is formed. Then, an adhesive resin is supplied during or after the fiber mat is formed, and the resin fiber mat supplied with the resin is heated and pressed.
樹脂の供給方法としては、不織布の繊維マットに水溶性樹脂を含浸させる湿式の方法、不織布の繊維マットの成形時に粉末樹脂を供給しておく乾式の方法が知られている。
As a resin supply method, a wet method in which a nonwoven fiber mat is impregnated with a water-soluble resin, and a dry method in which a powder resin is supplied at the time of forming the nonwoven fiber mat are known.
湿式の方法では、繊維束を解繊装置に供給して解繊処理を行った後、マット化してコンベアベルトにて搬送し、フェノール樹脂などの液状樹脂に浸漬して含浸させる。
In the wet method, a fiber bundle is supplied to a defibrating apparatus and subjected to a defibrating process, and then matted, conveyed by a conveyor belt, and immersed in a liquid resin such as a phenol resin to be impregnated.
乾式の方法では、バインダーに粉末樹脂を使用し、植物性繊維に粉末樹脂を混合して植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットを製造する（例えば特許文献１）。樹脂繊維マットを製造する際には、搬送用のコンベアベルトに植物性繊維や粉末樹脂を散布する工程や、粉末樹脂と植物性繊維を混合して植物性繊維中に粉末樹脂を均一に分散する工程などがある。
In the dry method, a powder resin is used as a binder, and a powder resin is mixed with vegetable fibers to produce a resin fiber mat made of a mixture of vegetable fibers and powder resin (for example, Patent Document 1). When manufacturing a resin fiber mat, a step of spraying vegetable fiber or powder resin on a conveyor belt for conveyance, or mixing powder resin and vegetable fiber to uniformly disperse the powder resin in the vegetable fiber There are processes.
この粉末樹脂を用いた乾式の方法によれば、粉末樹脂は取扱い易く、植物性繊維との混合が容易で、製造工程を簡略化することができると共に、密度むらがなく、剥離強度や吸湿時の寸法安定性が良好な繊維板を製造することができる。
According to the dry method using this powder resin, the powder resin is easy to handle, can be easily mixed with plant fibers, can simplify the production process, has no uneven density, and has a peel strength and moisture absorption. A fiberboard having good dimensional stability can be produced.
この樹脂繊維マットでは、加熱加圧成形の前に予備加熱を行うと、樹脂繊維マットを構成する植物性繊維に粉末樹脂の粒子を定着させて、樹脂繊維マットの取り回しを向上させることができる。予備加熱工程は、樹脂繊維マットを加熱装置内に搬送して、ヒータや熱風送風器等によって樹脂繊維マットを加熱することにより行われる。
In this resin fiber mat, when preheating is performed before the heat and pressure molding, powder resin particles can be fixed on the vegetable fiber constituting the resin fiber mat, and the handling of the resin fiber mat can be improved. The preheating step is performed by conveying the resin fiber mat into a heating device and heating the resin fiber mat with a heater, a hot air blower, or the like.
その後の、樹脂繊維マットの加熱加圧成形では、樹脂繊維マットを両面から一対の加熱加圧プレートで挟み、板状に成形して繊維板を製造する。
In the subsequent heat and pressure molding of the resin fiber mat, the resin fiber mat is sandwiched between a pair of heat and pressure plates from both sides and molded into a plate shape to produce a fiber plate.
ただ、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットを製造する乾式の方法においては、その製造過程で粉末樹脂が植物性繊維から脱落してこぼれ落ちることがある。例えば、上記した搬送用のコンベアベルトに植物性繊維や粉末樹脂を散布する工程や、粉末樹脂と植物性繊維を混合して植物性繊維中に粉末樹脂を均一に分散する工程などでは粉末樹脂の脱落が起き易い。そして粉末樹脂の含有率が規定値を下回る樹脂繊維マットは、繊維板として所期の物性を得ることができない。
However, in a dry method for producing a resin fiber mat made of a mixture of vegetable fibers and powder resin, the powder resin may fall off the plant fibers during the production process. For example, in the step of spraying vegetable fiber or powder resin on the conveyor belt for conveyance described above, or in the step of mixing the powder resin and vegetable fiber and uniformly dispersing the powder resin in the vegetable fiber, etc. Dropout is likely to occur. And the resin fiber mat in which the content rate of powder resin is less than a regulation value cannot obtain the expected physical property as a fiber board.
このため、粉末樹脂の含有率が規定値を下回ることがないように、樹脂繊維マットの製造現場においては樹脂繊維マットにおける粉末樹脂の含有率を測定して、粉末樹脂が規定率含有されているか確認することが求められる。
For this reason, in order to prevent the content rate of the powder resin from falling below the specified value, at the production site of the resin fiber mat, the content rate of the powder resin in the resin fiber mat is measured, and whether the powder resin is contained at the specified rate. Confirmation is required.
しかしながら、樹脂繊維マットにおける粉末樹脂の含有率を簡便に測定したり、粉末樹脂の含有率が適正か否かを簡便に判定することができる方法は確立されていない。
However, no method has been established that can easily measure the content of the powdered resin in the resin fiber mat or simply determine whether the content of the powdered resin is appropriate.
特に、樹脂繊維マットの形成から加熱加圧成形までの繊維板の製造工程においてインラインで粉末樹脂の含有率を測定し、その値が適切か否かを判定する方法は確立されていない。
In particular, a method for measuring the content of the powder resin in-line in the manufacturing process of the fiberboard from the formation of the resin fiber mat to the heat-press molding and determining whether the value is appropriate has not been established.
本発明は、以上のとおりの事情に鑑みてなされたものであり、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率を簡便にインラインで測定することができる樹脂繊維マットの粉末樹脂含有率の測定方法を提供することを課題としている。
The present invention has been made in view of the circumstances as described above, and is a resin fiber that can easily and inline measure the content of powder resin in a resin fiber mat made of a mixture of vegetable fiber and powder resin. An object of the present invention is to provide a method for measuring the powder resin content of a mat.
また、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率が適正か否かを簡便にインラインで判定することができる樹脂繊維マットの粉末樹脂含有率の判定方法を提供することを課題としている。
Also provided is a method for determining the content of a powder resin in a resin fiber mat, which enables simple in-line determination of whether the content of the powder resin in a resin fiber mat comprising a mixture of vegetable fiber and powder resin is appropriate. The challenge is to do.
上記の課題を解決するために、本発明の樹脂繊維マットの粉末樹脂含有率の測定方法は、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率を測定する方法であって、粉末樹脂と植物性繊維とを混合した樹脂繊維マットの片面に近赤外光を照射して、樹脂繊維マットからの反射光を近赤外分光計を用いて片面の所定の面積に渡って分析し、この所定の面積に渡って分析した平均値または合計値を、予め取得しておいた樹脂繊維マットにおける粉末樹脂の含有率と平均値または合計値との関係に基づいて照合し、樹脂繊維マットにおける粉末樹脂の含有率を求めることを特徴とする。
In order to solve the above problems, the method for measuring the resin content of the resin fiber mat according to the present invention is a method for measuring the content of the powder resin in the resin fiber mat comprising a mixture of vegetable fiber and powder resin. The near-infrared light is irradiated on one side of the resin fiber mat mixed with the powder resin and the vegetable fiber, and the reflected light from the resin fiber mat is applied to a predetermined area on one side using a near-infrared spectrometer. The average value or total value analyzed over this predetermined area is collated based on the relationship between the content of the powder resin in the resin fiber mat and the average value or total value acquired in advance. The content ratio of the powder resin in the resin fiber mat is obtained.
この樹脂繊維マットの粉末樹脂含有率の測定方法においては、所定の面積が０．５～２００ｃｍ2であることが好ましい。
In the method for measuring the resin content of the resin fiber mat, the predetermined area is preferably 0.5 to 200 cm 2 .
本発明の樹脂繊維マットの粉末樹脂含有率の判定方法は、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率を判定する方法であって、粉末樹脂と植物性繊維とを混合した樹脂繊維マットの片面に近赤外光を照射して、樹脂繊維マットからの反射光を近赤外分光計を用いて片面の所定の面積に渡って分析し、この所定の面積に渡って分析した平均値または合計値について、予め定めた合否判定基準に照らし適正か否かを判定することを特徴とする。
The method for determining the powder resin content of the resin fiber mat of the present invention is a method for determining the content of powder resin in a resin fiber mat comprising a mixture of vegetable fiber and powder resin, the powder resin and vegetable fiber The near-infrared light is irradiated on one side of the resin fiber mat mixed with and the reflected light from the resin fiber mat is analyzed over a predetermined area on one side using a near-infrared spectrometer. It is characterized by determining whether the average value or the total value analyzed over time is appropriate according to predetermined acceptance criteria.
本発明の樹脂繊維マットの粉末樹脂含有率の測定方法によれば、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率を簡便にインラインで測定することができる。また、前記所定の面積に渡って分析した平均値または合計値を基準としているので、表面が比較的粗い樹脂繊維マットでも精度の良い測定が可能となる。
According to the method for measuring the powder resin content of the resin fiber mat of the present invention, the content of the powder resin in the resin fiber mat composed of a mixture of vegetable fiber and powder resin can be measured easily in-line. Further, since the average value or the total value analyzed over the predetermined area is used as a reference, it is possible to measure with high accuracy even with a resin fiber mat having a relatively rough surface.
本発明の樹脂繊維マットの粉末樹脂含有率の判定方法によれば、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率が適正か否かを簡便にインラインで判定することができる。また、前記所定の面積に渡って分析した平均値または合計値を基準としているので、表面が比較的粗い樹脂繊維マットでも精度の良い測定が可能となる。
According to the method for determining the powder resin content of the resin fiber mat of the present invention, it is easily determined inline whether or not the content of the powder resin in the resin fiber mat composed of a mixture of vegetable fiber and powder resin is appropriate. be able to. Further, since the average value or the total value analyzed over the predetermined area is used as a reference, it is possible to measure with high accuracy even with a resin fiber mat having a relatively rough surface.
以下、本発明の一実施形態について図面を参照して説明する。図１は、本発明の一実施形態である樹脂繊維マットの粉末樹脂含有率の測定方法が適用された樹脂繊維マットの製造工程を示す模式図である。
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing a manufacturing process of a resin fiber mat to which a method for measuring the content of a resin powder in a resin fiber mat according to an embodiment of the present invention is applied.
樹脂繊維マットは、次のようにして製造される。まず、植物性繊維および粉末樹脂を準備する。
Resin fiber mat is manufactured as follows. First, vegetable fiber and powder resin are prepared.
植物性繊維としては、各種のものを用いることができる。例えば、ケナフ、亜麻、ラミー、大麻、ジュート等の麻類植物の靱皮から採取される繊維、マニラ麻やサイザル麻等の麻類植物の茎または端の筋から採取される繊維、針葉樹や広葉樹等を原料とする木材繊維等を挙げることができる。また、さとうきび、とうもろこし、竹、イネ等の農産廃棄物（例えば、さとうきびから糖分を煮出した後の搾りかす）を原料とする繊維も挙げることができる。これらの植物性繊維は、単独でも混合物でも使用可能である。
Various types of plant fibers can be used. For example, fibers collected from the bast of hemp plants such as kenaf, flax, ramie, cannabis, jute, fibers collected from the stem or end of hemp plants such as Manila hemp and sisal hemp, conifers and broadleaf trees The wood fiber etc. which are used as a raw material can be mentioned. Moreover, the fiber which uses agricultural wastes, such as sugarcane, corn, bamboo, and rice (for example, squeezed after simmering sugar from sugarcane) as a raw material can also be mentioned. These vegetable fibers can be used alone or in a mixture.
粉末樹脂は、後述する樹脂繊維マットを加熱加圧成形して得られる繊維板において植物性繊維同士を接着するバインダー成分となるものであり、一般的には、樹脂繊維マット全体中、質量比で４０％以下の割合で配合されている。本実施形態では、粉末樹脂は、常温（５～３５℃）で固体状であるが、所定の熱が加えられると溶融する樹脂が用いられる。ここで「溶融」とは軟化の意味をも含む。
The powder resin is a binder component that adheres plant fibers to each other in a fiberboard obtained by heating and press-molding a resin fiber mat, which will be described later, and is generally in a mass ratio throughout the resin fiber mat. It is blended at a ratio of 40% or less. In this embodiment, the powder resin is solid at normal temperature (5 to 35 ° C.), but a resin that melts when a predetermined heat is applied is used. Here, “melting” includes the meaning of softening.
このような粉末樹脂の樹脂種としては、例えば、ユリア樹脂、フェノール樹脂、メラミン樹脂、エポキシ樹脂、ウレタン樹脂、不飽和ポリエスエテル樹脂等の熱硬化性樹脂を挙げることができる。また、ポリプロピレン樹脂、ポリエチレン樹脂、ポリエチレンテレフタレート（ＰＥＴ）、塩化ビニル（ＰＶＣ）樹脂等の熱可塑性樹脂も挙げることができる。
Examples of the resin type of the powder resin include thermosetting resins such as urea resin, phenol resin, melamine resin, epoxy resin, urethane resin, and unsaturated polyester resin. Moreover, thermoplastic resins, such as a polypropylene resin, a polyethylene resin, a polyethylene terephthalate (PET), a vinyl chloride (PVC) resin, can also be mentioned.
粉末樹脂の粒径としては、平均粒径が３０μｍ以下であることが好ましい。このような範囲内の平均粒径を有する粉末樹脂は、植物性繊維との混合性がより良好となる。粉末樹脂の粒径の下限は特に制限されるものではないが、実際上は平均粒径５μｍが下限となる。なお、平均粒径は、市販のレーザー回折・散乱式粒度分布測定装置を用いて、レーザー回折・散乱法による粒度分布の測定値から、累積分布によるメディアン径（ｄ５０、体積基準）として求めることができる。
The average particle size of the powder resin is preferably 30 μm or less. The powder resin having an average particle size within such a range has better mixing properties with vegetable fibers. The lower limit of the particle diameter of the powder resin is not particularly limited, but in practice, the average particle diameter is 5 μm. The average particle diameter can be obtained as a median diameter (d50, volume basis) by cumulative distribution from a measured value of particle size distribution by a laser diffraction / scattering method using a commercially available laser diffraction / scattering particle size distribution measuring apparatus. it can.
次に、図１に示すように、搬送用の第１コンベアベルト３の上面に植物性繊維１を散布して繊維積層物４を形成し、その上に粉末樹脂２を散布して繊維積層物４の上面に均一に粉末樹脂２を分散させた積層体５を形成する。
Next, as shown in FIG. 1, the vegetable fiber 1 is spread | dispersed on the upper surface of the 1st conveyor belt 3 for conveyance, the fiber laminated body 4 is formed, and the powder resin 2 is spread | dispersed on it, and the fiber laminated body A laminated body 5 in which the powder resin 2 is uniformly dispersed is formed on the upper surface of 4.
例えば、植物性繊維１を第１コンベアベルト３とは別途のコンベアベルトで搬送してこのコンベアベルトの端部から下方に順次落下させ、このコンベアベルトの下方に配置されている第１コンベアベルト３上に均一に分散させて繊維積層物４を形成する。
For example, the vegetable fiber 1 is conveyed by a conveyor belt separate from the first conveyor belt 3 and sequentially dropped downward from the end of the conveyor belt, and the first conveyor belt 3 disposed below the conveyor belt. The fiber laminate 4 is formed by uniformly dispersing on the top.
そして第１コンベアベルト３の上方から粉末樹脂２を落下させて、繊維積層物４上に均一に分散させて積層体５を形成する。粉末樹脂２は、第１コンベアベルト３の上方に配置された平行並列な一対の供給用ロールの間から供給することができ、供給用ロールの回転を制御することにより供給量を制御することができる。
Then, the powder resin 2 is dropped from above the first conveyor belt 3 and uniformly dispersed on the fiber laminate 4 to form the laminate 5. The powder resin 2 can be supplied from between a pair of supply rolls arranged in parallel above the first conveyor belt 3, and the supply amount can be controlled by controlling the rotation of the supply roll. it can.
積層体５は第１コンベアベルト３によって解繊シリンダー６まで搬送される。解繊シリンダー６に搬送された積層体５は、解繊シリンダー６の回転によって植物性繊維１がほぐされ、粉末樹脂２が植物性繊維１と混合し、植物性繊維１中に粉末樹脂２が均一に分散する。
The laminated body 5 is conveyed to the defibrating cylinder 6 by the first conveyor belt 3. In the laminate 5 conveyed to the defibrating cylinder 6, the vegetable fiber 1 is loosened by the rotation of the defibrating cylinder 6, the powder resin 2 is mixed with the vegetable fiber 1, and the powder resin 2 is contained in the vegetable fiber 1. Disperse uniformly.
これら粉末樹脂２および植物性繊維１を混合した状態で、解繊シリンダー６の下方に配置されている搬送用の第２コンベアベルト７の上に順次落下させる。こうして第２コンベアベルト７の上面に、粉末樹脂２と植物性繊維１とが混合した状態で積層して樹脂繊維マット８が形成される。
In a state where the powder resin 2 and the vegetable fiber 1 are mixed, the powder resin 2 and the vegetable fiber 1 are sequentially dropped onto a second conveyor belt 7 for conveyance disposed below the defibrating cylinder 6. Thus, the resin fiber mat 8 is formed on the upper surface of the second conveyor belt 7 by laminating the powder resin 2 and the vegetable fiber 1 in a mixed state.
このようにして得られた樹脂繊維マット８は、その製造過程で粉末樹脂２が植物性繊維１から脱落してこぼれ落ちることがあるため、粉末樹脂２の含有率は、実際上未知である。本実施形態では、粉末樹脂２の含有率が未知である樹脂繊維マット８における粉末樹脂２の含有状態を近赤外反射光によって測定し、粉末樹脂２の含有率を求める。以下、その手順について説明する。
In the resin fiber mat 8 obtained in this way, since the powder resin 2 may fall off from the vegetable fiber 1 during the production process, the content of the powder resin 2 is actually unknown. In this embodiment, the content state of the powder resin 2 in the resin fiber mat 8 in which the content rate of the powder resin 2 is unknown is measured by near-infrared reflected light, and the content rate of the powder resin 2 is obtained. Hereinafter, the procedure will be described.
まず、図１に示すように、ハロゲンランプ等の近赤外光源９から近赤外光を樹脂繊維マット８に照射し、樹脂繊維マット８からの近赤外反射光に基づいて粉末樹脂２の含有率に対応する値を測定する。樹脂繊維マット８からの近赤外反射光を分光する分光手段としての近赤外分光計１０は、レンズからスリットを通った近赤外反射光を分光し、ＣＣＤカメラなどの２次元の検出器に受像する。
First, as shown in FIG. 1, near-infrared light is irradiated to the resin fiber mat 8 from a near-infrared light source 9 such as a halogen lamp, and the powder resin 2 of the powder resin 2 is irradiated based on the near-infrared reflected light from the resin fiber mat 8. The value corresponding to the content rate is measured. A near-infrared spectrometer 10 as a spectroscopic means for dispersing near-infrared reflected light from the resin fiber mat 8 disperses near-infrared reflected light from a lens through a slit, and a two-dimensional detector such as a CCD camera. Receive an image.
近赤外分光計１０としては、樹脂繊維マット８の線状エリアの多点を同時に分光可能な２次元分光器を使用できる。２次元分光器は、プリズムとグレーティング構造との組み合わせによって、線状エリアの各点からの光を波長帯に分光する。すなわちスリットを通った直線状の光を平面に展開して分光し、線状エリアの波長分布を検知できる。
As the near-infrared spectrometer 10, a two-dimensional spectrometer capable of simultaneously analyzing multiple points in the linear area of the resin fiber mat 8 can be used. The two-dimensional spectrometer separates light from each point in the linear area into a wavelength band by a combination of a prism and a grating structure. That is, the linear light passing through the slit is spread on a plane and dispersed to detect the wavelength distribution in the linear area.
樹脂繊維マット８の上方に線状の近赤外光源９を設置し、第２コンベアベルト７上の樹脂繊維マット８の線状エリアの多点を同時に分光する。第２コンベアベルト７によって樹脂繊維マット８を移動させることで、その線状エリアをスキャンすると、樹脂繊維マット８の表面における面状の各点を分光解析することができる。これにより樹脂繊維マット８からの近赤外反射光を所定の面積に渡って各点からの分光スペクトルとして２次元的に取得することができる。
The linear near-infrared light source 9 is installed above the resin fiber mat 8, and multiple points in the linear area of the resin fiber mat 8 on the second conveyor belt 7 are simultaneously dispersed. When the linear area is scanned by moving the resin fiber mat 8 by the second conveyor belt 7, each planar point on the surface of the resin fiber mat 8 can be spectrally analyzed. Thereby, the near-infrared reflected light from the resin fiber mat 8 can be acquired two-dimensionally as a spectral spectrum from each point over a predetermined area.
このように樹脂繊維マット８の表面について線状または面状の近赤外測定を行い、所定の面積に渡って分析する。この所定の面積としては、０．５～２００ｃｍ2であることが好ましい。このような範囲であれば、多点の測定値の平均値または合計値を求めることで、表面の粗い樹脂繊維マット８の各測定点の凹凸等による近赤外反射光のスペクトル強度の誤差を平均化して小さくし、精度の良い測定が可能となる。
In this way, linear or planar near-infrared measurement is performed on the surface of the resin fiber mat 8, and analysis is performed over a predetermined area. The predetermined area is preferably 0.5 to 200 cm 2 . Within such a range, the average value or the total value of the measurement values at multiple points is obtained, so that an error in the spectral intensity of the near-infrared reflected light due to the unevenness of each measurement point of the resin fiber mat 8 having a rough surface can be obtained. It is possible to perform measurement with high accuracy by averaging and reducing the size.
測定に使用される近赤外光の波長領域は、例えば１３００～２６００ｎｍの範囲であり、分析に際しては、樹脂の種類等に応じて、植物性繊維１のバックグラウンドから区別できる波長を選択する。樹脂の種類等に応じて特有の吸収があり、それぞれ特徴的なピークを生じるが、植物性繊維１のバックグラウンドとの吸収強度の差異が明りょうであることが必要となる点を考慮すると、１６００～２４００ｎｍの範囲が好ましく、１６００～１８００ｎｍの範囲がより好ましい。
The wavelength region of near-infrared light used for measurement is, for example, in the range of 1300 to 2600 nm, and a wavelength that can be distinguished from the background of the plant fiber 1 is selected according to the type of resin and the like. Depending on the type of resin, etc., there are specific absorptions, each producing a characteristic peak, but considering that the difference in absorption intensity from the background of the vegetable fiber 1 needs to be clear, The range of 1600 to 2400 nm is preferable, and the range of 1600 to 1800 nm is more preferable.
分析により得られる各点の測定値は、反射スペクトルに基づくものであり、例えば、特定波長の反射量である。また、植物性繊維１のバックグラウンドとの差が明確になるように規格化したものであってもよく、例えば粉末樹脂２を配合せずに作製した繊維マットを基準とした差スペクトルに基づく値であってもよい。 近赤外分光計１０で分光し検出器から出力された近赤外反射光のデータは、検出器に接続されたコンピュータに入力される。コンピュータは、近赤外反射光のデータについて、必要に応じて粉末樹脂２を配合せずに作製した繊維マットを基準とした差スペクトルにする等の演算処理を行う。その後、所定の面積に渡って分析した各点の近赤外反射光のデータについての平均値または合計値を算出し、これを分析値とする。
Measured value of each point obtained by analysis is based on the reflection spectrum, for example, the amount of reflection at a specific wavelength. Moreover, what was normalized so that the difference with the background of the vegetable fiber 1 may become clear, for example, the value based on the difference spectrum on the basis of the fiber mat produced without mix | blending the powder resin 2 is used. It may be. Near-infrared reflected light data that has been separated by the near-infrared spectrometer 10 and output from the detector is input to a computer connected to the detector. The computer performs arithmetic processing such as making the difference spectrum with reference to the fiber mat produced without blending the powder resin 2 as necessary with respect to the data of the near-infrared reflected light. Thereafter, an average value or a total value of the near-infrared reflected light data of each point analyzed over a predetermined area is calculated, and this is used as an analysis value.
コンピュータには、予め取得しておいた樹脂繊維マット８の粉末樹脂２の含有率と分析値（平均値または合計値）との検量線がグラフまたは関係式として格納されている。実際に測定した分析値を検量線と照合することによって、粉末樹脂２の含有率を算出することができる。この結果は、必要に応じてディスプレイ等の出力装置に出力される。
In the computer, a calibration curve between the content of the powder resin 2 of the resin fiber mat 8 and the analysis value (average value or total value) obtained in advance is stored as a graph or a relational expression. The content rate of the powder resin 2 can be calculated by collating the analytical value actually measured with the calibration curve. This result is output to an output device such as a display as necessary.
検量線の作成について、図２を例として説明する。図２（ａ）は、粉末樹脂の含有率を変更して製造した樹脂繊維マットの近赤外反射スペクトルである。具体的には、粉末樹脂の含有率が樹脂繊維マット全体中、質量比で０％、１５％、１８％、３０％となっている４種の樹脂繊維マットを用いている。
The creation of a calibration curve will be described with reference to FIG. Fig.2 (a) is a near-infrared reflection spectrum of the resin fiber mat manufactured by changing the content rate of powder resin. Specifically, four types of resin fiber mats in which the content ratio of the powder resin is 0%, 15%, 18%, and 30% in mass ratio in the entire resin fiber mat are used.
このように樹脂量が既知の複数の樹脂繊維マット８を用いて測定したデータに基づいて検量線を作成する。樹脂量が既知の複数の樹脂繊維マット８のそれぞれにおける粉末樹脂２の含有率に対応する値は、例えば図２（ｂ）のような樹脂０％のスペクトルに対する差スペクトルとしてもよい。 検量線の作成は、このような樹脂量とスペクトル量とのデータから、線形回帰、非線形回帰等の回帰分析を最小二乗法等によって行い、樹脂繊維マット８における粉末樹脂２の含有率とスペクトルデータとの関係を示した回帰式として得ることができる。例えば、横軸を樹脂量（樹脂繊維マットにおける粉末樹脂の含有率）、縦軸をスペクトルデータ（分析値）として得ることができる。
Thus, a calibration curve is created based on data measured using a plurality of resin fiber mats 8 with known resin amounts. The value corresponding to the content of the powder resin 2 in each of the plurality of resin fiber mats 8 whose resin amount is known may be a difference spectrum with respect to the spectrum of 0% resin as shown in FIG. The calibration curve is created by performing regression analysis such as linear regression and nonlinear regression from the data of the resin amount and the spectral amount by the least square method or the like, and the content ratio and spectral data of the powder resin 2 in the resin fiber mat 8. It can be obtained as a regression equation showing the relationship. For example, the horizontal axis can be obtained as the resin amount (content ratio of the powder resin in the resin fiber mat), and the vertical axis can be obtained as the spectrum data (analytical value).
このように図２（ａ）、（ｂ）のような近赤外反射光の測定値に基づいて予め取得しておいた検量線から、樹脂繊維マット中の粉末樹脂の含有率を算出する。こうして算出された粉末樹脂の含有率を、樹脂繊維マットにおける粉末樹脂の含有率として求めることができる。 以上のような樹脂繊維マットの粉末樹脂含有率の測定方法によれば、植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける粉末樹脂の含有率を簡便にインラインで測定することができる。また、所定の面積に渡って分析した平均値または合計値を基準としているので、精度の良い測定が可能となる。
Thus, the content rate of the powder resin in the resin fiber mat is calculated from the calibration curve acquired in advance based on the measured values of the near infrared reflected light as shown in FIGS. 2 (a) and 2 (b). The content ratio of the powder resin thus calculated can be obtained as the content ratio of the powder resin in the resin fiber mat. According to the method for measuring the resin content of the resin fiber mat as described above, the content of the powder resin in the resin fiber mat made of a mixture of vegetable fiber and powder resin can be easily measured in-line. Further, since the average value or the total value analyzed over a predetermined area is used as a reference, it is possible to measure with high accuracy.
すなわち、一般的に繊維板の表面は植物性繊維による凹凸があり平滑性が低いが、以上のような樹脂繊維マットの粉末樹脂含有率の測定方法によれば、所定の面積に渡って分析した平均値または合計値を基準としている。そのため、表面が比較的粗い樹脂繊維マットでも、繊維板の表面の植物性繊維によるランダムな凹凸に起因する近赤外反射光の誤差を低減することができ、精度の良い測定が可能となる。
That is, the surface of the fiberboard is generally uneven due to vegetable fibers and has low smoothness, but according to the method for measuring the resin content of the resin fiber mat as described above, analysis was performed over a predetermined area. Based on average or total. Therefore, even with a resin fiber mat having a relatively rough surface, errors in near-infrared reflected light caused by random irregularities due to plant fibers on the surface of the fiber board can be reduced, and accurate measurement can be performed.
測定された粉末樹脂２の含有率が規定値であれば、樹脂繊維マット８を加熱加圧工程に搬送する。加熱加圧工程では、樹脂繊維マット８を両面から一対の加熱加圧プレートで挟み、板状に成形して、繊維板を製造する。
If the measured content of the powder resin 2 is a specified value, the resin fiber mat 8 is conveyed to the heating and pressing step. In the heating and pressing step, the resin fiber mat 8 is sandwiched between a pair of heating and pressing plates from both sides and formed into a plate shape to manufacture a fiber plate.
加熱加圧工程の前に、あるいは上記の近赤外光による粉末樹脂含有率の測定の前に、この樹脂繊維マット８は、予備加熱工程に搬送されてもよい。予備加熱工程では、樹脂繊維マット８を不図示の加熱装置内に搬送して、この加熱装置内で樹脂繊維マット８を加熱することにより、樹脂繊維マット８を構成する植物性繊維１に粉末樹脂２の粒子を定着させて、樹脂繊維マット８の取り回しを向上させる。この加熱装置は、樹脂繊維マット８を搬送するコンベアベルトと、コンベアベルト上の樹脂繊維マット８を加熱するヒータや熱風送風器等の加熱器とが内部に設けられ、コンベアベルトにより搬送された樹脂繊維マット８が加熱器にて加熱されるようになっている。
The resin fiber mat 8 may be transported to a preheating step before the heating and pressurizing step or before the measurement of the powder resin content by near infrared light. In the preliminary heating step, the resin fiber mat 8 is conveyed into a heating device (not shown), and the resin fiber mat 8 is heated in the heating device, whereby the vegetable fiber 1 constituting the resin fiber mat 8 is powdered resin. 2 particles are fixed, and the handling of the resin fiber mat 8 is improved. This heating device includes a conveyor belt that conveys the resin fiber mat 8 and a heater such as a heater or hot air blower that heats the resin fiber mat 8 on the conveyor belt, and the resin conveyed by the conveyor belt. The fiber mat 8 is heated by a heater.
予備加熱工程における加熱条件は、粉末樹脂２の種類によって適宜設定されるものであるが、熱硬化性樹脂を用いる場合は６０～１２０℃の加熱温度で５～１０分間加熱することが好ましい。粉末樹脂２として熱可塑性樹脂を用いる場合は、加熱温度を樹脂が融解する温度以上とすることにより、粉末樹脂２を溶融状態とする。例えばポリプロピレンからなる粉末樹脂２を用いる場合には１５０～１８０℃程度で加熱を行う。
The heating conditions in the preheating step are appropriately set according to the type of the powder resin 2, but when a thermosetting resin is used, it is preferably heated at a heating temperature of 60 to 120 ° C. for 5 to 10 minutes. When a thermoplastic resin is used as the powder resin 2, the powder resin 2 is brought into a molten state by setting the heating temperature to a temperature equal to or higher than the temperature at which the resin melts. For example, when powder resin 2 made of polypropylene is used, heating is performed at about 150 to 180 ° C.
その後の加熱加圧工程では、粉末樹脂２に熱硬化性樹脂を用いる場合、樹脂繊維マット８に対して加熱プレスを行い、これにより樹脂繊維マット８を成形すると共に、樹脂繊維マット８を構成する粉末樹脂２を成形硬化して、繊維板が得られる。このときの加熱温度は粉末樹脂２が硬化する温度であればよいが、加熱温度が高すぎると植物性繊維１が炭化するおそれがあるため、好ましくは１５０～２００℃の範囲で加熱する。またプレス圧力とプレス時間は、得られる繊維板の強度性能や吸湿時の寸法安定性に影響を及ぼすものであり、好ましくはプレス圧力１．９６～４．９０ＭＰａ（２０～５０ｋｇｆ／ｃｍ2）、プレス時間５～２０分間の条件でプレス成形を行う。またこのとき成形される繊維板の密度は、０．６～０．９ｇ／ｃｍ3となるようにすることが好ましい。
In the subsequent heating and pressing step, when a thermosetting resin is used for the powder resin 2, the resin fiber mat 8 is heated and pressed, thereby forming the resin fiber mat 8 and configuring the resin fiber mat 8. The powder resin 2 is molded and cured to obtain a fiberboard. The heating temperature at this time may be a temperature at which the powder resin 2 is cured. However, if the heating temperature is too high, the vegetable fiber 1 may be carbonized, and thus the heating is preferably performed in the range of 150 to 200 ° C. The pressing pressure and pressing time affect the strength performance of the fiberboard to be obtained and the dimensional stability at the time of moisture absorption. Preferably, the pressing pressure is 1.96 to 4.90 MPa (20 to 50 kgf / cm 2 ), Press molding is performed under conditions of a press time of 5 to 20 minutes. Further, the density of the fiberboard formed at this time is preferably 0.6 to 0.9 g / cm 3 .
粉末樹脂２に熱可塑性樹脂を用いる場合は、予備加熱工程を経た樹脂繊維マット８であれば、粉末樹脂２が溶融状態のままプレス成形工程に移送され、板状にプレス成形を行い、これにより繊維板が成形される。このとき樹脂繊維マット８に対して粉末樹脂２を構成する熱可塑性樹脂が硬化する温度で冷間プレスを行い、これにより樹脂繊維マット８を成形すると共に、樹脂繊維マット８を構成する粉末樹脂２を成形硬化して、繊維板が得られる。このときのプレス圧力とプレス時間は、得られる繊維板の強度性能や吸湿時の寸法安定性に影響を及ぼすものであり、好ましくはプレス圧力１．９６～４．９０ＭＰａ（２０～５０ｋｇｆ／ｃｍ2）、プレス時間１０～６０分間の条件でプレス成形を行う。またこのとき成形される繊維板の密度は、０．６～０．９ｇ／ｃｍ3となるようにすることが好ましい。
When a thermoplastic resin is used for the powder resin 2, if the resin fiber mat 8 has undergone a preheating process, the powder resin 2 is transferred to the press molding process in a molten state, and is pressed into a plate shape. A fiberboard is formed. At this time, the resin fiber mat 8 is cold-pressed at a temperature at which the thermoplastic resin constituting the powder resin 2 is cured, thereby forming the resin fiber mat 8 and the powder resin 2 constituting the resin fiber mat 8. Is molded and cured to obtain a fiberboard. The pressing pressure and pressing time at this time affect the strength performance of the resulting fiberboard and the dimensional stability during moisture absorption, and preferably the pressing pressure is 1.96 to 4.90 MPa (20 to 50 kgf / cm 2). ), Press molding is performed under the condition of pressing time of 10 to 60 minutes. Further, the density of the fiberboard formed at this time is preferably 0.6 to 0.9 g / cm 3 .
このようにして得られた繊維板は、高い強度特性および吸水・吸湿時の寸法安定性を有し、このような性能が要求される住宅用部材、内装部材や造作部材などに好適に用いることができる。例えば、ドアパネル、引戸、間仕切りなどの内装建具に使用されるフラッシュパネルの表面材、あるいはフローリング仕上げ床や階段の踏み板などの床材に好適に用いることができる。
The fiberboard thus obtained has high strength characteristics and dimensional stability at the time of water absorption / moisture absorption, and should be suitably used for housing members, interior members, artificial members, etc. that require such performance. Can do. For example, it can be suitably used for a surface material of a flash panel used for interior fittings such as a door panel, a sliding door, and a partition, or a floor material such as a flooring finish floor or a stair tread.
樹脂繊維マットにおける粉末樹脂の含有率を測定する方法として、上記した方法以外の方法では、ソックスレー法が考えられる。ソックスレー法は、樹脂繊維マットをアセトンに浸漬して粉末樹脂を抽出し、乾燥させて粉末樹脂の含有率を把握する方法である。
As a method for measuring the content of the powder resin in the resin fiber mat, a Soxhlet method can be considered as a method other than the method described above. The Soxhlet method is a method in which a resin fiber mat is immersed in acetone to extract a powder resin and dried to grasp the content of the powder resin.
しかしながら、ソックスレー法は測定設備が大がかりであり、また、測定に時間がかかるため、製造現場での粉末樹脂の含有率の把握には不向きである。
However, the Soxhlet method requires a large amount of measurement equipment and takes a long time to measure, so it is not suitable for grasping the content of the powder resin at the production site.
これに対して、本実施形態の測定方法は、樹脂繊維マットに近赤外光を照射し、その反射光から樹脂繊維マットにおける粉末樹脂の含有率を求めることができるので、簡便な方法といえる。
On the other hand, the measurement method of the present embodiment can be said to be a simple method because the resin fiber mat can be irradiated with near infrared light and the content of the powder resin in the resin fiber mat can be obtained from the reflected light. .
また、樹脂繊維マットを破壊することなく、樹脂繊維マットにおける粉末樹脂の含有率を短時間で測定することができるので、インラインでの測定が可能である。
Further, since the content of the powder resin in the resin fiber mat can be measured in a short time without destroying the resin fiber mat, in-line measurement is possible.
なお、上記の実施形態は、グラフまたは関係式を用いて、樹脂繊維マット中の粉末樹脂含有率を求めたが、粉末樹脂含有率が予め設定した基準範囲内に収まっているか否かを判定したい場合には、次のようにする。
In the above embodiment, the powder resin content in the resin fiber mat is obtained using a graph or a relational expression. However, it is desired to determine whether the powder resin content is within a preset reference range. If so, do the following:
すなわち、樹脂繊維マットからの反射光を近赤外分光計を用いて所定の面積に渡って分析した平均値または合計値（あるいはそれに対応する粉末樹脂の含有率）の合否判定基準として、上記した粉末樹脂の含有率に対応する値である平均値または合計値の基準範囲を予め設定しておく。この設定はコンピュータへの入力や記憶手段への格納などによって可能である。
That is, as described above as the pass / fail judgment standard of the average value or the total value (or the content ratio of the powder resin corresponding thereto) obtained by analyzing the reflected light from the resin fiber mat over a predetermined area using a near-infrared spectrometer. A reference range of an average value or a total value which is a value corresponding to the content of the powder resin is set in advance. This setting can be made by input to a computer or storage in a storage means.
次に、上記の測定方法により得られた樹脂繊維マットにおける粉末樹脂の含有率が、予め定めた合否判定基準に照らし適正か否かを判定する。具体的には、近赤外光を樹脂繊維マットに照射して得られた分析値である平均値または合計値が、その基準範囲内にあるか否かを判定する。この工程もコンピュータの演算手段によって自動的に行うことができる。
Next, it is determined whether or not the content of the powder resin in the resin fiber mat obtained by the above measurement method is appropriate in light of predetermined acceptance criteria. Specifically, it is determined whether an average value or a total value, which is an analysis value obtained by irradiating the resin fiber mat with near infrared light, is within the reference range. This step can also be performed automatically by computer computing means.
以上のように、樹脂繊維マット中の粉末樹脂の含有率が適正か否かを判定することもでき、この判定について機械的に自動化されたシステムも構築できる。
As described above, it is possible to determine whether or not the content ratio of the powder resin in the resin fiber mat is appropriate, and it is possible to construct a mechanically automated system for this determination.
１ 植物性繊維
２ 粉末樹脂
８ 樹脂繊維マット
１０ 近赤外分光計 DESCRIPTION OF SYMBOLS 1Vegetable fiber 2 Powder resin 8 Resin fiber mat 10 Near-infrared spectrometer
２ 粉末樹脂
８ 樹脂繊維マット
１０ 近赤外分光計 DESCRIPTION OF SYMBOLS 1
Claims (3)
- 植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける前記粉末樹脂の含有率を測定する方法であって、前記粉末樹脂と前記植物性繊維とを混合した前記樹脂繊維マットの片面に近赤外光を照射して、前記樹脂繊維マットからの反射光を近赤外分光計を用いて前記片面の所定の面積に渡って分析し、この所定の面積に渡って分析した平均値または合計値を、予め取得しておいた前記樹脂繊維マットにおける前記粉末樹脂の含有率と前記平均値または合計値との関係に基づいて照合し、前記樹脂繊維マットにおける前記粉末樹脂の含有率を求めることを特徴とする樹脂繊維マットの粉末樹脂含有率の測定方法。 A method for measuring the content of the powder resin in a resin fiber mat comprising a mixture of vegetable fiber and powder resin, wherein the resin fiber mat mixed with the powder resin and the vegetable fiber is near red on one side. Irradiated with external light, the reflected light from the resin fiber mat is analyzed over a predetermined area of the one surface using a near-infrared spectrometer, and the average value or total value analyzed over the predetermined area Is determined based on the relationship between the content ratio of the powder resin in the resin fiber mat acquired in advance and the average value or the total value, and obtaining the content ratio of the powder resin in the resin fiber mat. A method for measuring the content of powder resin of a resin fiber mat.
- 前記所定の面積が０．５～２００ｃｍ2であることを特徴とする請求項１に記載の樹脂繊維マットの粉末樹脂含有率の測定方法。 The method for measuring a powder resin content of a resin fiber mat according to claim 1, wherein the predetermined area is 0.5 to 200 cm 2 .
- 植物性繊維と粉末樹脂との混合物からなる樹脂繊維マットにおける前記粉末樹脂の含有率を判定する方法であって、前記粉末樹脂と前記植物性繊維とを混合した樹脂繊維マットの片面に近赤外光を照射して、前記樹脂繊維マットからの反射光を近赤外分光計を用いて前記片面の所定の面積に渡って分析し、この所定の面積に渡って分析した平均値または合計値について、予め定めた合否判定基準に照らし適正か否かを判定することを特徴とする樹脂繊維マットの粉末樹脂含有率の判定方法。 A method for determining the content of the powder resin in a resin fiber mat made of a mixture of vegetable fiber and powder resin, wherein one side of the resin fiber mat obtained by mixing the powder resin and the vegetable fiber is near infrared. Irradiating light, analyzing the reflected light from the resin fiber mat over a predetermined area of the one side using a near-infrared spectrometer, about the average value or the total value analyzed over the predetermined area A method for determining the content of a powder resin in a resin fiber mat, wherein it is determined whether or not it is appropriate in light of predetermined acceptance criteria.
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| EP3181313A1 (en) * | 2015-12-18 | 2017-06-21 | SWISS KRONO Tec AG | Method for applying a liquid to a substrate, in particular a fiber cake and wood panel manufacturing device |
| JP2022101146A (en) * | 2020-12-24 | 2022-07-06 | パナソニックホールディングス株式会社 | Composite resin cellulose composite discrimination method and apparatus |
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| JP2002505963A (en) * | 1998-03-05 | 2002-02-26 | アクゾ ノーベル エヌ．ブイ． | Method for controlling production process of cellulose fiber-containing product |
| JP2003525445A (en) * | 2000-03-02 | 2003-08-26 | バルメツト・フアイバーテツク・アクテイエボラーグ | A method for continuous measurement of wood fiber flow properties for fiberboard production. |
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| JP2002505963A (en) * | 1998-03-05 | 2002-02-26 | アクゾ ノーベル エヌ．ブイ． | Method for controlling production process of cellulose fiber-containing product |
| JP2003525445A (en) * | 2000-03-02 | 2003-08-26 | バルメツト・フアイバーテツク・アクテイエボラーグ | A method for continuous measurement of wood fiber flow properties for fiberboard production. |
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| EP3181313A1 (en) * | 2015-12-18 | 2017-06-21 | SWISS KRONO Tec AG | Method for applying a liquid to a substrate, in particular a fiber cake and wood panel manufacturing device |
| EP3189951A1 (en) * | 2015-12-18 | 2017-07-12 | SWISS KRONO Tec AG | Method for producing a wood palette and wood panel production device |
| JP2022101146A (en) * | 2020-12-24 | 2022-07-06 | パナソニックホールディングス株式会社 | Composite resin cellulose composite discrimination method and apparatus |
| JP7258839B2 (en) | 2020-12-24 | 2023-04-17 | パナソニックホールディングス株式会社 | Cellulose composite determination method and apparatus for composite resin |
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