JPH0814488B2 - Sheet thickness unevenness measurement method - Google Patents
Sheet thickness unevenness measurement methodInfo
- Publication number
- JPH0814488B2 JPH0814488B2 JP27792787A JP27792787A JPH0814488B2 JP H0814488 B2 JPH0814488 B2 JP H0814488B2 JP 27792787 A JP27792787 A JP 27792787A JP 27792787 A JP27792787 A JP 27792787A JP H0814488 B2 JPH0814488 B2 JP H0814488B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness unevenness
- unevenness
- thickness
- measuring
- paper
- 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.)
- Expired - Fee Related
Links
- 238000000691 measurement method Methods 0.000 title 1
- 238000009826 distribution Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910001111 Fine metal Inorganic materials 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 238000010030 laminating Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 229920001875 Ebonite Polymers 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- LEQAOMBKQFMDFZ-UHFFFAOYSA-N glyoxal Chemical compound O=CC=O LEQAOMBKQFMDFZ-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229940015043 glyoxal Drugs 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はシートの厚さムラ測定方法であって、合成樹
脂フィルム，紙等のシート等に塗工又はラミネートする
際の原紙の厚さムラを測定し、塗工又はラミネート後の
表面平滑性を簡単に予測又は管理できる厚さムラ測定方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a method for measuring unevenness in thickness of a sheet, which is used for coating or laminating a sheet such as a synthetic resin film or paper. The present invention relates to a thickness unevenness measuring method capable of easily predicting or controlling the surface smoothness after coating or laminating.
従来、塗工又はラミネート製品表面の平滑性を表現す
る方法として、表面の凹凸そのもの又はそれを数値化し
たもので表現している。即ち、従来は一般的に各種の平
滑度計を使用したり又は特開昭59-224842号公報に記載
されているように表面粗さ計等が用いられ、これによっ
て均一性を表現している。Conventionally, as a method of expressing the smoothness of the surface of a coated or laminated product, the unevenness of the surface itself or a numerical value thereof is expressed. That is, conventionally, various smoothness meters are generally used, or a surface roughness meter or the like as described in JP-A-59-224842 is used to express the uniformity. .
しかしながら、一般的に塗工又はラミネート方法は互
いに周接している２本のロールのニップ間に挿通すると
共に、塗工又はラミネート面の反対面が硬いゴムロール
又は金属ロールであるため、出来上り製品の表面平滑性
はたんに塗工又はラミネートする面の凹凸だけではなく
反対面の凹凸の影響を受ける。However, in general, the coating or laminating method is performed by inserting the nip between two rolls that are in contact with each other, and the opposite side of the coating or laminating surface is a hard rubber roll or metal roll. The smoothness is affected not only by the unevenness of the surface to be coated or laminated but also by the unevenness of the opposite surface.
例えば前記のようにシートの反対面に硬いゴムロール
又は金属ロールのように硬い平坦なものをあてたとき、
塗工又はラミネート面が平坦であっても、シートの裏面
の凹凸に影響され、出来上り製品の表面は平坦にならず
凹凸が生ずる。For example, when applying a hard flat roll such as a hard rubber roll or metal roll to the opposite surface of the sheet as described above,
Even if the coated or laminated surface is flat, the surface of the finished product is not flat due to the unevenness of the back surface of the sheet, and unevenness occurs.
従って、前述従来の如くたんに表面の凹凸のみを測定
しただけでは出来上り製品の表面の平滑性は何等保証で
きず、これらを含めた塗工品質を判定することの出来る
地合ムラ（厚さムラ）の測定方法の開発が必要である。Therefore, the surface smoothness of the finished product cannot be guaranteed by simply measuring only the surface irregularities as in the above-mentioned conventional method, and the coating unevenness (thickness unevenness) that includes these can be judged. ) It is necessary to develop a measuring method.
本発明は前述従来の欠点を改善するため研究の結果，
シート原紙の厚さムラを測定することによって塗工又は
ラミネート紙の表面平滑性を簡単に判定できる方法を提
供することにある。The present invention has been studied to improve the above-mentioned conventional drawbacks,
It is an object of the present invention to provide a method capable of easily determining the surface smoothness of coated or laminated paper by measuring the thickness unevenness of the sheet base paper.
本発明は塗工又はラミネートするシートの原紙を、両
面から微小金属球で、かつ微小圧力で挾んで走行させ、
該金属球の微小変位を差動トランスによって電気信号に
変換し、該電気信号をマイクロコンピューターに入力
し、該マイクロコンピューターで厚さの密度分布図を求
めると共に、該密度分布図の最大値ａに対する分布図の
幅ｂとの比b/aを算出してシートの厚さムラを求めると
いう構成からなるシートの厚さムラ測定方法である。The present invention, the base paper of the sheet to be coated or laminated, the fine metal balls from both sides, and run with a small pressure,
The minute displacement of the metal sphere is converted into an electric signal by a differential transformer, the electric signal is input to a microcomputer, the density distribution map of the thickness is obtained by the microcomputer, and the maximum value a of the density distribution map is calculated. The sheet thickness unevenness measuring method is configured to calculate the ratio b / a with the width b of the distribution chart to obtain the sheet thickness unevenness.
本発明は以上の如き構成のものからなり、かかる厚さ
ムラを測定する方法に用いる装置の一例としては次の如
き装置が用いられる。The present invention is constituted as described above, and the following device is used as an example of the device used in the method for measuring the thickness unevenness.
測定部： 測定端子……直径5mmの金属性ボール。 Measuring part: Measuring terminal: A metal ball with a diameter of 5 mm.
測定部……前記２つの金属ボールで、20〜100g/チップ
の加圧下で測定する。Measuring unit: Measure with the two metal balls under pressure of 20-100g / chip.
電気変換部：直線性の良い差動トランス。 Electrical converter: A differential transformer with good linearity.
尚、前記の如き装置の一例としては、安立電気株式会
社製の「フィルム厚み連続測定器,K-306A広範囲電子マ
イクロメーター」等が好適であるが、これに限定される
ものではない。As an example of the above-mentioned device, “Film thickness continuous measuring instrument, K-306A wide range electronic micrometer” manufactured by Anritsu Electric Co., Ltd. is suitable, but it is not limited to this.
第１図及び第２図は夫々前記装置による原紙の厚さム
ラの一例を示したものであるが、測定方法（横軸）に対
する厚さ（縦軸）の凹凸が直線に近ければ近い程良好で
あって、第１図の場合は第２図よりも良好であることが
認められる。FIG. 1 and FIG. 2 respectively show an example of the unevenness of the thickness of the base paper by the above-mentioned apparatus. The closer the unevenness of the thickness (vertical axis) to the measuring method (horizontal axis) is, the better. It is recognized that FIG. 1 is better than FIG.
また、前記の如き装置から得られた厚さムラを判定す
るに当り、（イ）得られる曲線を周波数解析して各成分
の波長に対する強度から算出する方法（Ｉ−方法とす
る）と、（ロ）その曲線の一定長の確率密度分布を測定
する方法（II−方法とする）が考えられる。Further, in determining the thickness unevenness obtained from the device as described above, (a) a method of performing frequency analysis on the obtained curve and calculating from the intensity of each component with respect to the wavelength (referred to as I-method); (B) A method (II-method) of measuring the probability density distribution of a certain length of the curve can be considered.
しかし、Ｉ−方法は紙のような不規則性の強いものに
対しては測定毎に特性ピーク波長の位置が変化するため
に、特性ピークを特定し難く試験装置には不適である。However, the I-method is not suitable for a test apparatus because it is difficult to specify the characteristic peak for the strongly irregular material such as paper because the position of the characteristic peak wavelength changes for each measurement.
一方、II−方法における確率密度分布は、例えば測定
される厚さよりやや広いある一定の範囲を等分して各々
の厚さに対応する数を各厚さに対してプロットし、さら
に全体に対する百分率で表わしたものであって、各測定
曲線の形の変動の割りには、一定サンプルに対しては一
定の結果が得られ易い。これはそのサンプル毎に十点平
均最大振幅や各周期に対する強度の分布も微小周期毎に
平均して見ればほぼ一定になるためと考えられる。従っ
て、本発明では前記II−方法によって測定する。On the other hand, the probability density distribution in the II-method is, for example, a certain range that is slightly wider than the measured thickness is equally divided and the number corresponding to each thickness is plotted for each thickness, and the percentage of the total is calculated. The constant result is easily obtained for a constant sample, despite the variation in the shape of each measurement curve. It is considered that this is because the ten-point average maximum amplitude for each sample and the intensity distribution for each cycle are also almost constant when averaged for each minute cycle. Therefore, in the present invention, the measurement is carried out by the above-mentioned method II.
前記のようにして得られる確率密度分布のより簡単な
判定方法として、その分布の最大高さａと、その分布の
底辺の範囲、即ち分布の幅ｂとの比b/aを求めることに
よって、厚さムラの度合を簡単に、かつ適確に表現する
ことができる。尚、この場合密度分布の底辺の幅（ｂ）
は、分布が0.5％以上の分布に対応するものを採択すれ
ばよい。As a simpler determination method of the probability density distribution obtained as described above, by obtaining the ratio b / a of the maximum height a of the distribution and the range of the base of the distribution, that is, the width b of the distribution, The degree of thickness unevenness can be expressed easily and accurately. In this case, the width of the bottom of the density distribution (b)
Should adopt the one corresponding to the distribution of 0.5% or more.
例えば、前記第１図及び第２図に示したものを確率密
度分布で示せば、表−１並びに第３図及び第４図に示す
通りである。For example, the probability density distributions shown in FIGS. 1 and 2 are as shown in Table 1 and FIGS. 3 and 4.
即ち、このb/a（以下厚みムラ指数という）と元の曲
線のムラの多少とが相関し、b/aが小さいほどムラが小
さいこと、即ち、測定したフィルム・紙等の均一性が良
好なことが判る。 That is, this b / a (hereinafter referred to as thickness unevenness index) correlates with the degree of unevenness of the original curve, and the smaller the b / a, the smaller the unevenness, that is, the better the uniformity of the measured film or paper. I understand that.
これらａ、ｂの単位、表現法は、比較する測定系に対
して一定していれば、相対比較としてムラをほぼ正しく
表現可能であり、特に固定する必要はない。If the units of a and b and the expression method are constant with respect to the measurement system to be compared, unevenness can be expressed almost correctly as a relative comparison, and it is not particularly necessary to fix.
即ち、ｂとしてムラに比例する測定電位（例えば、Vo
ltの単位）、これを厚さに換算したもの（例えば、ミク
ロンメーターで表現したもの）等々が可能である。ま
た、ａとして確率密度化しないで、分布の個数そのもの
で表現したものであってもよい。That is, the measured potential proportional to the unevenness as b (for example, Vo
(unit of lt), a value converted into the thickness (for example, expressed in micrometer), and the like are possible. Further, a may be expressed by the number of distributions itself, without being made into a probability density.
以上のことから、前記金属球で前記微小加圧下でフィ
ルム・紙等の厚みムラを測定し、それを差動トランス出
力電気信号に変換し、その電気信号をデーターレコーダ
ー（好ましくは、いわゆるデジタルの装置が良いが、ア
ナログデーターレコーダーでも作成出来る）に記録し、
そのデーターをGP-IBインターフェース又はRS-232Cイン
ターフェース等を用いていわゆるマイクロコンピュータ
ーに転送し、前記ムラ指数b/aの計算結果を表示又は印
字することによって原紙の厚さムラを簡単に測定でき、
この原紙に塗工又はラミネートした場合の表面平滑性を
簡単かつ適確に予測でき、塗工紙又はラミネート紙等の
管理を容易ならしめることができる。From the above, the thickness unevenness of the film / paper or the like is measured with the metal balls under the minute pressure, the thickness unevenness is converted into an electric signal output from a differential transformer, and the electric signal is transferred to a data recorder (preferably a so-called digital The device is good, but you can also create it with an analog data recorder)
You can easily measure the thickness unevenness of the base paper by transferring the data to a so-called microcomputer using a GP-IB interface or RS-232C interface and displaying or printing the calculation result of the unevenness index b / a,
The surface smoothness when coated or laminated on the base paper can be predicted easily and accurately, and the coated paper or the laminated paper can be easily managed.
〔実施例〕 本発明を下記に示す実施例をもって具体的に説明す
る。[Examples] The present invention will be specifically described with reference to the following examples.
実施例１ デラックスファイナー（以下DFとする）で400cc（CS
F）まで叩解したLBKPと、ダブルデイスクリファイナー
（以下DDRとする）で430ccまで叩解したNBKPとを下記表
−２の各種割合で混合し、サイズ剤（荒川化学社製，商
品名SPS-400）を0.05部，タルク20％を夫々添加し、硫
酸バンドでpH4.5に調整してＡ−２コート紙製造用加工
原紙を坪量84.9g/m2で600m/分で製造した。オンマシン
でカレンダー掛けを行い、平滑度（王子製紙株式会社研
究所式平滑度計で測定）30秒に製造した。Example 1 400cc (CS with Deluxe Finer (hereinafter referred to as DF)
F) beaten LBKP and double disc refiner (hereinafter referred to as DDR) NBKP beaten to 430 cc are mixed in various proportions shown in Table 2 below, and a sizing agent (Arakawa Chemical Co., Ltd., trade name SPS-400) 0.05 parts of talc and 20% of talc were added, and the pH was adjusted to 4.5 with a sulfuric acid band to produce a processed base paper for producing A-2 coated paper at a basis weight of 84.9 g / m 2 at 600 m / min. It was calendered on-machine and manufactured with a smoothness of 30 seconds (measured by Oji Paper Co., Ltd. laboratory smoothness meter).
前記各種原紙にクレー70部，重質炭酸カルシウム10
部，水酸化アルミニウム20部,SBRラテックス（日本合成
株式会社製，商品名JSR-0693）10部，澱粉５部，グリオ
キザール0.3部，ステアリン酸カルシウム0.2部及び分散
剤（東亜合成化学株式会社製，商品名アロン・T-40）0.
2部からなるコート紙用水系塗料をブレードコーターで5
00m/分で両面塗工した。70 parts clay and 10 parts calcium carbonate
Part, aluminum hydroxide 20 parts, SBR latex (manufactured by Nippon Gosei Co., Ltd., trade name JSR-0693) 10 parts, starch 5 parts, glyoxal 0.3 part, calcium stearate 0.2 part and dispersant (manufactured by Toagosei Kagaku Co., Ltd., product Name Aron T-40) 0.
5 parts of water-based paint for coated paper consisting of 2 parts with a blade coater
Both sides were coated at 00m / min.
次いでオフラインで一定荷重でスーパーカレンダー処
理した。この場合表−２中のサンプルNo.1で光沢度55％
になる加圧で行った。It was then super-calendered offline with constant load. In this case, sample No. 1 in Table-2 has a gloss of 55%.
It was carried out under pressure.
この原紙の厚さムラを安立電気株式会社製のK-306A広
範囲電子マイクロメーターを用いて次の条件で測定し
た。The thickness unevenness of this base paper was measured under the following conditions using a K-306A wide range electronic micrometer manufactured by Anritsu Electric Co., Ltd.
（イ）厚さ測定部レンジ（K306AのMEDレンジ）……13mV
/1μ （ロ）データー記憶転送部の入力レンジ……０〜1V （ハ）測定部定数 測定時間 10秒…… 測定速度 25mm/秒…… 測定長さ 250mm…… （ニ）演算部状態 データ測定数 1000点…… 金属球の加圧 36g/チップ…… 尚、この場合確率密度分布は1Vの範囲を128等分して1
000点の測定数を100％に規格化して確率密度分布を作製
し、表−２の如き結果を得た。尚、コート紙の品質とし
て、平坦性の評価を平滑度で測定した結果を併記する。(A) Thickness measurement range (K306A MED range): 13 mV
/ 1μ (b) Input range of data storage / transfer section …… 0 to 1V (c) Measuring section constant Measuring time 10 seconds …… Measuring speed 25mm / second …… Measuring length 250mm …… (d) Calculation section status data measurement A few thousand points …… Pressure of a metal ball 36g / chip …… In this case, the probability density distribution is 1 divided by 128 in the range of 1V.
The probability density distribution was prepared by standardizing the number of measurements at 000 points to 100%, and the results shown in Table 2 were obtained. As the quality of the coated paper, the result of the flatness evaluation measured by the smoothness is also shown.
前記表−２から明らかな如く、原紙の平滑度が同じで
も、その上に塗工した後の平滑度には大きな差が生じて
いることが認められ、その平滑度は原紙の厚さムラ指数
と相関性を有することが認められ、指数が小さくなる程
コート紙の平坦性が良好である。 As is clear from Table 2 above, even if the base paper has the same smoothness, it is recognized that there is a large difference in the smoothness after coating on the base paper. The flatness of the coated paper is better as the index becomes smaller.
即ち、前記のようにコート紙等に対する厚さムラ指数
は、塗工後の物性特に平坦性を予想するのに適した指数
であり、その有効性が明らかである。That is, as described above, the thickness non-uniformity index for coated paper or the like is an index suitable for predicting the physical properties after coating, particularly the flatness, and its effectiveness is clear.
実施例２ 下記表−３の配合からなるパルプを実施例１と同じ薬
品処方で400m/分で104.7g/m2に抄紙し、オンラインで緊
度プレスロール（メタルロール／硬質ゴムロールの組合
せ）とカレンダーロール（メタルロール）とを掛け、カ
レンダーロールの加重変化で平滑度100秒の原紙を抄紙
した。Example 2 Pulp made from the formulations shown in Table 3 below was made into 104.7 g / m 2 at 400 m / min with the same chemical formulation as in Example 1, and online with a tight press roll (combination of metal roll / hard rubber roll). A calender roll (metal roll) was applied, and a base paper having a smoothness of 100 seconds was made by changing the weight of the calender roll.
前記原紙の片面側に、ウェットラミネーターで７μの
厚さのアルミニウム箔をラミネート加工した。この際、
ラミネートに使用する糊は、合成ゴム系エマルジョン
（サイデン化学社製，商品名サイビノールX-11）を5g/m
2塗工し、ラミネート後アルミニウム箔表面保護のため
アクリル系エマルジョン（サイデン化学社製，商品名サ
イビノールX-19）を0.3g/m2で塗工した。An aluminum foil having a thickness of 7 μ was laminated on one side of the base paper with a wet laminator. On this occasion,
The glue used for laminating is 5 g / m of synthetic rubber emulsion (Cybinol X-11, product name, manufactured by Saiden Chemical Co., Ltd.).
2 was applied, acrylic emulsion for lamination after the aluminum foil surface protection (Saiden Chemical Co., Ltd., trade name Saibinol X-19) was coated with 0.3 g / m 2.
前記ラミネート紙の表面の平坦度を目視と平滑度で判
定すると共に、実施例１と同一装置で原紙の厚さムラを
測定した。尚、この場合実施例１に比較して平坦性が良
くなっているため、評価の精度を上げるために、厚さ測
定部レンジをHighレンジ（32.7mV/1μ）で測定する。結
果は表−４の通りである。 The flatness of the surface of the laminated paper was judged visually and by smoothness, and the thickness unevenness of the base paper was measured by the same apparatus as in Example 1. In this case, since the flatness is better than that in Example 1, the thickness measurement unit range is measured in the High range (32.7 mV / 1μ) in order to improve the evaluation accuracy. The results are shown in Table-4.
表−４から明らかな如く平滑度が同じ原紙であって
も、アルミニウム箔をラミネートしたものは、原紙の厚
さムラがラミネート紙のアルミニウム箔表面の平坦性に
大きく影響することが判かる。 As is clear from Table 4, even if the base paper has the same smoothness, it is understood that when the aluminum foil is laminated, the unevenness of the thickness of the base paper greatly affects the flatness of the aluminum foil surface of the laminated paper.
また、NBKPをDF叩解しても繊維長が長いままになるた
めか大きなフロックが形成され、地合が悪化し加圧下で
厚さムラが強く発生するためと考えられる。It is also considered that large flocs are formed, probably because the fiber length remains long even when NBKP is beaten by DF, the formation is deteriorated, and the thickness unevenness is strongly generated under pressure.
第５図乃至第７図はテストNo.5乃至No.7の厚さムラの
曲線を示したものであり、また第８図乃至第10図は夫々
テストNo.5乃至No.7の確率密度分布並びに第11図乃至第
13図にその拡大写真を示したものである。Figures 5 to 7 show the curves of thickness unevenness of tests No. 5 to No. 7, and Figures 8 to 10 show the probability density of tests No. 5 to No. 7, respectively. Distribution and Figures 11 to
Figure 13 shows the enlarged photograph.
第５図乃至第７図から明らかなようにテストNo.5の厚
さムラの周期は小さく良好な地合いが形成され、これに
対しテストNo.7では厚さムラの周期が大きく、前記フロ
ック径が大きいことを示唆しているものと考えられる。As is clear from FIGS. 5 to 7, in the test No. 5, the cycle of the thickness unevenness is small and a good texture is formed, whereas in the test No. 7, the cycle of the thickness unevenness is large and the flock diameter is large. Is considered to be a large value.
さらに、第８図乃至第10図及び第11図乃至第13図の写
真から明らかなように厚さムラ指数は地合いと明らかに
相関を有しており、原紙の厚さムラを測定することによ
って地合いの良否の判定が簡単にでき、従って塗工又は
ラミネート後の平坦性の推定が容易である。Further, as is clear from the photographs of FIGS. 8 to 10 and 11 to 13, the thickness unevenness index has a clear correlation with the texture, and by measuring the thickness unevenness of the base paper, The quality of the texture can be easily determined, and therefore the flatness after coating or laminating can be easily estimated.
以上の如く本発明は塗工又はラミネートしたシートの
表面平坦性の判定に当り、原紙の厚さムラを測定し、該
厚さムラの分布図から分布図の最大値ａと分布図の幅ｂ
との比b/aを測定することによってシート表面の平坦性
を簡単、かつ適確に判定できるから最終製品の良否を容
易に予測、管理することができる。As described above, in the present invention, when determining the surface flatness of a coated or laminated sheet, the thickness unevenness of the base paper is measured, and from the distribution chart of the thickness unevenness, the maximum value a of the distribution chart and the width b of the distribution chart are measured.
Since the flatness of the sheet surface can be easily and accurately determined by measuring the ratio b / a with the above, it is possible to easily predict and manage the quality of the final product.
第１図及び第２図は夫々連続的に厚さを測定したグラフ
の一例、第３図及び第４図は夫々第１図及び第２図の厚
さの確率密度分布図、第５図乃至第６図は夫々テストN
o.5乃至No.7の厚さを連続的に測定したグラフ第８図乃
至第10図は夫々第５図乃至第７図の確率密度分布図、で
ある。1 and 2 are examples of graphs in which the thickness is continuously measured, and FIGS. 3 and 4 are probability density distribution diagrams of thickness in FIGS. 1 and 2, respectively, and FIGS. Fig. 6 shows test N respectively
Graphs obtained by continuously measuring the thicknesses of o.5 to No. 7 are FIGS. 8 to 10, which are probability density distribution diagrams of FIGS. 5 to 7, respectively.
Claims (1)
面から微小金属球で、かつ微小圧力で挾んで走行させ、
該金属球の微小変位を差動トランスによって電気信号に
変換し、該電気信号をマイクロコンピューターに入力
し、該マイクロコンピューターで厚さの密度分布図を求
めると共に、該密度分布図の最大値ａに対する分布図の
幅ｂとの比b/aを算出してシートの厚さムラを求めるこ
とを特徴とするシートの厚さムラ測定方法。1. A base paper for a sheet to be coated or laminated is made to run with fine metal balls on both sides and with a small pressure,
The minute displacement of the metal sphere is converted into an electric signal by a differential transformer, the electric signal is input to a microcomputer, the density distribution map of the thickness is obtained by the microcomputer, and the maximum value a of the density distribution map is calculated. A sheet thickness unevenness measuring method, characterized in that a sheet thickness unevenness is obtained by calculating a ratio b / a with a width b of a distribution chart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27792787A JPH0814488B2 (en) | 1987-11-02 | 1987-11-02 | Sheet thickness unevenness measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27792787A JPH0814488B2 (en) | 1987-11-02 | 1987-11-02 | Sheet thickness unevenness measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01221610A JPH01221610A (en) | 1989-09-05 |
| JPH0814488B2 true JPH0814488B2 (en) | 1996-02-14 |
Family
ID=17590224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27792787A Expired - Fee Related JPH0814488B2 (en) | 1987-11-02 | 1987-11-02 | Sheet thickness unevenness measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814488B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940395A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨市凯瑞达海绵制造有限公司 | Device and method for measuring thicknesses of high-speed motion polyurethane foam strip sheets |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109000632B (en) * | 2018-08-27 | 2020-09-04 | 长乐雨盟机电科技有限公司 | A building construction verticality deviation observer |
-
1987
- 1987-11-02 JP JP27792787A patent/JPH0814488B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940395A (en) * | 2014-04-16 | 2014-07-23 | 哈尔滨市凯瑞达海绵制造有限公司 | Device and method for measuring thicknesses of high-speed motion polyurethane foam strip sheets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01221610A (en) | 1989-09-05 |
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