CN102768031A - Method for determining lamination thickness and single layer thickness of papermaking process reconstituted tobaccos - Google Patents

Abstract

The invention relates to a method for measuring single-layer thickness and layered thickness of reconstituted tobacco leaves by papermaking method, and belongs to the technical field of physical index measurement of reconstituted tobacco leaves by papermaking method. The method for measuring tobacco leaf single-layer thickness and laminated thickness of the present invention comprises: a. the preparation of sample: punch the sample with an inner diameter of a puncher of 18mm; b. calibration and adjustment of the instrument; c. single-layer thickness Measurement: measure the thickness of 10 discs with a thickness meter, calculate the average value to obtain the thickness value of a single layer; measure the thickness of the layer: randomly take 5 discs and stack them up, and measure the thickness, and then calculate the layer thickness according to the number of layers Thickness value; after the indicated value is stable, the instrument will automatically record the reading; d. Calculation of the result, the result shall be kept to 4 decimal places. The method of the invention has the advantages of safety, convenience and accuracy, and the measured single-layer thickness and laminate thickness indexes can characterize the physical characteristics of the reconstituted tobacco leaf by the papermaking method.

Description

A kind of method of measuring papermaking-method reconstituted tobaccos thickness in monolayer and lamination thickness

Technical field:

The present invention relates to a kind of method of measuring papermaking-method reconstituted tobaccos thickness in monolayer and lamination thickness, belong to papermaking-method reconstituted tobaccos physical index determination techniques field.

Background technology:

The thickness of papermaking-method reconstituted tobaccos is one of its important physical characteristic, and the thickness index has reflected the quality of papermaking-method reconstituted tobaccos.Thickness can influence other physical characteristics of papermaking-method reconstituted tobaccos, such as quantitatively, and tensile strength, hydroscopicity or the like, thickness is too big, can cause the papermaking-method reconstituted tobaccos moisture not high, can occur the phenomenon of drafting, anxious saw shape silk group during chopping, influences its purity; Thickness is too small, can make papermaking-method reconstituted tobaccos quantitatively less than normal, and its physical strength also can be affected.

Aspect the research of tobacco leaf thickness; Forefathers adopt has instruments such as vernier caliper, clock gauge and thickness gauge to measure tobacco leaf thickness, and still, papermaking-method reconstituted tobaccos is different from tobacco leaf again; More be different from paper; It is the industrial products of tobacco leaf, possesses the characteristic of the multiaspect that tobacco leaf and papermaking opens, but with them significant difference is arranged.So, use for reference tobacco leaf and field of papermaking thickness measuring method, the concrete parameter that refinement is measured is found out the experimental technique that is fit to the papermaking-method reconstituted tobaccos thickness measurement.

Through the document retrieval, do not see the public reported identical with the present invention.

Summary of the invention:

The object of the present invention is to provide a kind of safe, easy, measure the method for papermaking-method reconstituted tobaccos thickness accurately.

The concrete steps that the present invention measures the papermaking-method reconstituted tobaccos thickness approach are following:

(1) preparation of sample:

The papermaking-method reconstituted tobaccos sample is placed on more than middle balance 48 h of climatic chamber (22 ℃ ± 1 ℃, relative humidity is 60% ± 3%).Using diameter is the card punch of 18 mm, and selecting does not have the tobacco sample of damaged and eye to punch.In this operating process, do not exert pressure to tobacco sample.

(2) calibration of instrument and adjusting:

The calibration of A card punch and adjusting: after every dozen of 1000 appearance of new card punch, the card punch diameter is calibrated, then changed as defective with micrometer inside caliper.

The calibration of B thickness gauge and adjusting:

Press the instrument operation instructions, instrument is calibrated and regulated.

(3) Determination of thickness

The mensuration of A thickness in monolayer: measure the thickness of 10 disks of a papermaking-method reconstituted tobaccos sample respectively with thickness gauge, calculating mean value obtains the thickness in monolayer value of this papermaking-method reconstituted tobaccos sample.

B lamination Determination of thickness: it is range upon range of that papermaking-method reconstituted tobaccos sample is got 5 disks at random; Be positioned between the thickness gauge two measurement faces; Measure range upon range of disk one-tenth-value thickness 1/10; 5 disk discarded measuring calculate the lamination one-tenth-value thickness 1/10 of this sheet papermaking-method reconstituted tobaccos again according to the number of plies.Papermaking-method reconstituted tobaccos sample replication 10 times calculates the lamination one-tenth-value thickness 1/10 that 10 times mean value obtains this papermaking-method reconstituted tobaccos sample.

C measures process

At first mix up instrument zero, sample is put between open measurement face.With the speed that is lower than 3 mm/s another measurement face is moved on on the sample lightly during test, attention should avoid producing any percussive action.After treating that indicated value is stable, instrument writes down reading automatically.

(4) calculating of thickness and analysis

The calculating of thickness in monolayer: according to the data of being tested, calculate the thickness in monolayer value that 10 times mean value obtains this papermaking-method reconstituted tobaccos sample, like formula (1), result of calculation keeps 4 decimals.

$S=\frac{{\displaystyle \underset{i=1}{\overset{10}{\∑}}{t}_i}}{10}\·\·\·\left(1\right)$

In the formula: S: thickness in monolayer, mm; t _i: the thickness of individual sequin, mm.

The calculating of lamination thickness: the lamination one-tenth-value thickness 1/10 that calculates this sheet papermaking-method reconstituted tobaccos according to the data of being tested and the number of plies.Each processing is provided with 10 repetitions, calculates the lamination one-tenth-value thickness 1/10 that 10 times mean value obtains this papermaking-method reconstituted tobaccos sample, and like formula (2), (3), result of calculation keeps 4 decimals.

$b=\frac{c}{5}\·\·\·\left(2\right)$

In the formula: the lamination thickness of b:5 layer sequin, mm; The gross thickness of c:5 layer disk, mm.

$B=\frac{{\displaystyle \underset{i=1}{\overset{10}{\∑}}{b}_i}}{10}\·\·\·\left(3\right)$

In the formula: B: the lamination thickness of sample, mm; b _i: the lamination thickness of 5 layers of disk, mm.

That method of the present invention has is safe, easy, accurately reach accurate advantage, and the papermaking-method reconstituted tobaccos thickness in monolayer of mensuration and lamination thickness index can characterize the papermaking-method reconstituted tobaccos physical characteristics.

Description of drawings:

What accompanying drawing showed is the estimation limit average of the RSD of papermaking-method reconstituted tobaccos different layers product thickness test determination value.

Embodiment:

The concrete steps that the thickness in monolayer of the mensuration papermaking-method reconstituted tobaccos in the present embodiment and the method for lamination thickness are partly described by summary of the invention are carried out.

1. test material

Get representative 3 kinds of papermaking-method reconstituted tobaccos samples (providing), be designated as RT-1 respectively, RT-2, RT-3 by domestic certain papermaking-method reconstituted tobaccos manufacturing enterprise.

2 test apparatuses

Computer observing and controlling thickness measuring instrument BHZ-1 type (the Changjiang river, Sichuan papermaking instrument Ltd); Diameter is the card punch (self-control) of 18 mm.

3 Determination of thickness

3.1 the mensuration of thickness in monolayer

Should under the test atmospheric environment of GB/T1644 regulation, test sample, measure the thickness of 10 disks of a papermaking-method reconstituted tobaccos sample respectively with thickness gauge, calculating mean value obtains the thickness in monolayer value of this papermaking-method reconstituted tobaccos sample.

3.2 lamination Determination of thickness

It is range upon range of that papermaking-method reconstituted tobaccos sample is got a set number of plies disk at random; Be positioned between the thickness gauge two measurement faces; Measure range upon range of disk one-tenth-value thickness 1/10, the disk discarded of measuring calculates the lamination one-tenth-value thickness 1/10 of this sheet papermaking-method reconstituted tobaccos again according to the number of plies.Papermaking-method reconstituted tobaccos sample replication 10 times calculates the lamination one-tenth-value thickness 1/10 that 10 times mean value obtains this papermaking-method reconstituted tobaccos sample.

Each sample is provided with 6 processing respectively promptly: 1 layer, 2 layers, 3 layers, 4 layers, 5 layers, 6 layers sample are that unit carries out Determination of thickness, and each processing is provided with 10 repetitions.

4. thickness measurement result and statistical study

4.1 the statistic of papermaking-method reconstituted tobaccos different layers product thickness measurement value is described

Table 1 is that test of papermaking-method reconstituted tobaccos different layers product thickness and thickness in monolayer statistic are described, and can find out that therefrom generally, same sample is along with the increase of lamination number, and thickness in monolayer reduces gradually, and RSD also reduces gradually.Explaining increases the stability enhancing that lamination is counted test figure, and collimation is good more.

Test of table 1 papermaking-method reconstituted tobaccos different layers product thickness and thickness in monolayer statistic are described

4.2 the contrast of the RSD of different layers product one-tenth-value thickness 1/10

Accompanying drawing shows the estimation limit average of the RSD of papermaking-method reconstituted tobaccos different layers product thickness test determination value; Find out among the figure; In the same thickness of sample test, it is minimum that the RSD that measures 6 layers of disk thickness is set, and the RSD of 1 layer of disk thickness is maximum; Along with the lamination number increases, RSD estimates that marginal average is more little.Explained and adopted the many thickness measurement test design of the number of plies to be superior to the few thickness measurement test of the number of plies that explain that also the lamination thickness measurement is more stable than individual layer disk thickness measurement test figure, collimation is better.Except that 1 layer, other handles RSD all less than 5%.

4.3 the variance analysis of the RSD of different layers product one-tenth-value thickness 1/10 and multiple ratio are

Table 2 is variance analyses of the RSD of different layers product one-tenth-value thickness 1/10, find out processing p 0.05, explain to reach significant difference between handling.

Table 3 is that the RSD of different layers product one-tenth-value thickness 1/10 adopts multiple ratio that the LSD method carries out; Find out, between 1 layer and 2,3 layers of processing, p>0.05; 1 layer of processing and 2,3 layers of mutual there was no significant difference of processing are described; Between 1 layer and 4 layers, 5 layers, 6 layers processing, p 0.05, explain between 1 layer of processing and 4 layers, 5 layers, 6 layers processing to have reached significant difference; Reached significant difference between 2 layers of processing and 5 layers, 6 layers processing; Reached significant difference between 5 layers of processing adopting and 1,2 layer of processing, and handled there was no significant difference, combined Fig. 1 simultaneously with other; The RSD of 5 layers of processing is lower, again from the test labor capacity and cost consideration, so; Measure thickness for 5 layers that adopt, science, reasonable, effective.

The variance analysis of the RSD of table 2 different layers product one-tenth-value thickness 1/10

The multiple ratio of the RSD of table 3 different layers product one-tenth-value thickness 1/10

From the result, find out; Take all factors into consideration from the labor capacity and the cost aspect of test again, adopt 5 mensuration papermaking-method reconstituted tobaccos sample stabilities obviously to be superior to other and handle, explored the concrete parameter and the condition that are more suitable for the papermaking-method reconstituted tobaccos sample; Thickness with lamination thickness method working sample also has been described; The physical thickness index of the sign papermaking-method reconstituted tobaccos more stable than thickness in monolayer so the lamination thickness method has not only improved data stability, has also improved testing efficient.The lamination thickness method is superior to the thickness in monolayer method, and this provides more suitable method for papermaking-method reconstituted tobaccos related scientific research personnel, for the research of papermaking-method reconstituted tobaccos thickness provides reliable method.

Claims (1)

1. A method for measuring single-layer thickness and laminated thickness of reconstituted tobacco leaves by papermaking method, characterized in that the concrete steps of single-layer thickness and laminated thickness of this measured papermaking method reconstituted tobacco leaf are as follows: (1) Sample preparation Put the papermaking reconstituted tobacco leaf samples in a constant temperature and humidity box with a temperature of 22°C ± 1°C and a relative humidity of 60% ± 3% for more than 48 hours; use a puncher with a diameter of 18 mm to select no damage and holes perforation of the reconstituted tobacco leaf sample; during this operation, no pressure is applied to the reconstituted tobacco leaf sample; (2) Calibration and adjustment of the instrument A. Calibration and adjustment of the hole punch: For every 1000 samples of the new hole punch, use an inner micrometer to calibrate the diameter of the hole punch, and replace it if it is unqualified; Calibration and adjustment of B thickness gauge Calibrate and adjust the instrument according to the instrument instruction manual; (3) Determination of thickness A single-layer thickness measurement: measure the thickness of 10 small discs of a papermaking method reconstituted tobacco leaf sample with a thickness meter, and calculate the average value to obtain the single-layer thickness value of the papermaking method reconstituted tobacco leaf sample; B. Determination of laminated thickness: A paper-making reconstituted tobacco leaf sample randomly takes 5 discs and stacks them, and places them between the two measuring surfaces of the thickness meter to measure the thickness of the stacked discs. The measured 5 discs are discarded. , and then calculate the layered thickness value of the sheet of papermaking reconstituted tobacco leaf according to the number of layers; a papermaking method reconstituted tobacco leaf sample is repeatedly measured 10 times, and the average value of 10 times is calculated to obtain the layered thickness value of the papermaking method reconstituted tobacco leaf sample; C determination process First adjust the zero point of the instrument, and put the sample between the open measuring surfaces; during the test, gently move the other measuring surface to the sample at a speed lower than 3 mm/s, avoiding any impact; After the indicated value is stable, the instrument will automatically record the reading; (4) Calculation and analysis of thickness Calculation of single-layer thickness: According to the tested data, calculate the average value of 10 times to obtain the single-layer thickness value of the reconstituted tobacco leaf sample by the papermaking method, such as formula (1), and the calculation result retains 4 decimal places; $\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; =</span>\frac{{\displaystyle \underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 10</span>}}{<span\; class="notranslate">\; \&Sum;</span>}}{\mathrm{<span\; class="notranslate">\; t</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}}{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$ In the formula: S: the thickness of a single layer, mm; t _i : the thickness of a small disc, mm; Calculation of layer thickness: Calculate the layer thickness value of the papermaking method reconstituted tobacco leaf according to the tested data and the number of layers; set 10 repetitions for each treatment, and calculate the average value of 10 times to obtain the papermaking method reconstituted tobacco leaf sample. Lamination thickness value, such as formula (2), (3), the calculation result retains 4 decimal places; $\mathrm{<span\; class="notranslate">\; b</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; c</span>}}{\mathrm{<span\; class="notranslate">\; 5</span>}}<span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$ In the formula: b: stacked thickness of 5-layer wafers, mm; c: total thickness of 5-layer wafers, mm; $\mathrm{<span\; class="notranslate">\; B</span>}<span\; class="notranslate">\; =</span>\frac{{\displaystyle \underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 10</span>}}{<span\; class="notranslate">\; \&Sum;</span>}}{\mathrm{<span\; class="notranslate">\; b</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}}{\mathrm{<span\; class="notranslate">\; 10</span>}}<span\; class="notranslate">\; \&CenterDot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; \&Center\; Dot;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$ In the formula: B: laminated thickness of the sample, mm; b _i : laminated thickness of the 5-layer wafer, mm.

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