CN112577895A

CN112577895A - System and method for testing lip adhesion force of tipping paper for cigarettes

Info

Publication number: CN112577895A
Application number: CN202011611863.4A
Authority: CN
Inventors: 杨继; 刘志华; 朱瑞芝; 向能军; 司晓喜; 刘春波; 唐石云; 何沛; 蒋薇; 张凤梅; 李振杰; 苏钟璧; 杨晨; 蒋昆明
Original assignee: China Tobacco Yunnan Industrial Co Ltd
Current assignee: China Tobacco Yunnan Industrial Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-03-30

Abstract

The invention belongs to the technical field of analysis and detection, and particularly relates to a system and a method for testing the lip adhesion of cigarette tipping paper. The test system comprises: artificial lips, test equipment; wherein the artificial lips are silica gel blocks; the test apparatus includes: the device comprises a tribometer testing platform (1), a force measuring sensor (2), a rigid rope (4), a pulley (6), a pulley bracket and a sample loading module (9). The invention provides a device and a method for testing the lip adhesion force of cigarette tipping paper, which can objectively and accurately detect the lip adhesion force of the cigarette tipping paper, effectively avoid fuzzy concepts such as lip adhesion, lip injury and the like obtained by traditional sensory evaluation, and avoid the defects of large influence of subjective factors, large difference of product suction results, harm to human health and the like.

Description

System and method for testing lip adhesion force of tipping paper for cigarettes

Technical Field

The invention belongs to the technical field of analysis and detection, and particularly relates to a system and a method for testing the lip adhesion of cigarette tipping paper.

Background

The cigarette filter tip mainly comprises three layers of acetate fiber, forming paper and tipping paper. Among these are tipping paper, also known as tipping paper, which is used to wrap around the outside of the filter and to adhere the filter to the end of the tobacco rod. The tipping paper is a decorative paper obtained by printing and coating tipping base paper and processing the tipping base paper in other modes, is usually cork color or opaque white color, and has the effect of improving the appearance. Connect dress paper with smoker's lip direct contact, it only uses coating or printing ink to print on the dress paper to connect generally, when weather is dry, when the consumer smokes the cigarette, because probably there is a small amount of saliva will connect dress paper to dip in wet, slowly dry again at the smoking in-process, there is the adhesive action to dress paper in the remaining saliva protein meeting of lip, lead to connecing on the filter tip dress paper adhesion on the lip skin, it tears the phenomenon that appears tearing, hemorrhage even to glue the lip, can not spit the filter tip smoothly after having smoked, seriously influence cigarette consumption and experience and feel.

At present, the lip adhesion force of the cigarette tipping paper is not measured at home and abroad. All the cigarette companies and cigarette accessory manufacturers mostly adopt artificial sensory evaluation to judge whether the tipping paper for cigarettes sticks to the lips. And moreover, no related standard is issued, so that the detection and judgment results have larger difference. In order to standardize the quality of auxiliary materials for cigarettes, increase the consumption comfort of cigarettes and reduce the utilization rate of tipping paper for cigarettes with lip adhesion, the lip adhesion of the tipping paper for cigarettes needs to be accurately measured and judged, and meanwhile, a corresponding objective screening test method and test equipment are established.

Disclosure of Invention

The present invention has been made to solve the above problems.

The invention provides a test system for lip adhesion of cigarette tipping paper, which comprises: artificial lips, test equipment;

wherein the artificial lips are silica gel blocks or 3M low-viscosity adhesive tapes;

the test apparatus includes: a tribometer testing platform 1, a force measuring sensor 2, a rigid rope 4, a pulley 6, a pulley bracket, a sample loading module 9,

the device comprises a pulley bracket, a rigid rope 4, a force-measuring sensor 2, a sample loading module 9, a sample loading module, a sample unloading module and a sample loading module, wherein the pulley bracket is provided with a pulley 6, the rigid rope 4 slides in the pulley 6, the rigid rope 4 is L-shaped, one end in the horizontal direction is connected with the force-measuring sensor 2, and the other end in the vertical;

the artificial lips are positioned right below the sample loading module 9 and are contacted with the sample loading module at a test position;

friction resistance testing software is installed in the tribometer testing platform 1, the tribometer testing platform 1 is in communication connection with the force sensor 2, and the tribometer testing platform 1 controls the movement of the rigid rope 4 and records the change of force on the rigid rope 4 along with time and/or position.

The frictional resistance test software was commercial software: MAP software full name: exe, purchasers: Thwing-Albert company.

The artificial lip selection can be a silica gel block or a 3M low-viscosity adhesive tape.

Preferably, the test system further comprises: artificial saliva that is sprayed onto a test surface of the artificial lips at the time of testing. Artificial saliva at 36-37 degrees celsius may be used for more accurate simulation of human conditions.

Preferably, the artificial saliva comprises sodium chloride, potassium chloride, calcium chloride, sodium dihydrogen phosphate, magnesium chloride, urea, glucose, mucin, amylase, acid phosphatase, and lysozyme.

Preferably, the artificial saliva contains 1.40mmol/L sodium chloride, 0.5mmol/L potassium chloride, 0.1mmol/L calcium chloride, 0.15mmol/L sodium dihydrogen phosphate, 0.025mmol/L magnesium chloride, 0.09mmol/L urea, 0.2mmol/L glucose, 2.7mmol/L bovine submandibular gland mucin, 2.5units/mL amylase, 0.004units/mL acid phosphatase, 0.7units/mL lysozyme.

Preferably, the artificial lips are detachably mounted on an artificial lip stand, and a horizontal adjustment part is provided under the artificial lip stand. The horizontal adjusting part can use a horizontal adjusting nut to ensure that the artificial lip is horizontally placed.

Preferably, two ends of the rigid rope 4 are respectively connected with the load cell 2 and the sample loading module 9 through movable connecting pieces. The movable connecting piece can use a snap ring. The use of movable joints here makes it possible to balance the forces, ensuring that the forces of the rigid string 4 on the load cell 2 and the loading module 9 act on the entire surface of the contact surface on average. The movable connecting piece can be a snap ring.

If the rigid rope 4 is not connected with the sample loading module 9 through a movable connecting piece, but is directly connected with the sample loading module 9, when the sample loading module 9 is pulled by the rigid rope 4 to be separated from the artificial lip, the sample loading module 9 and the artificial lip may start to be separated at a certain corner of a contact surface of the two, so that the mechanical test result is inaccurate and the repeatability is poor.

Preferably, the sample loading module 9 is a counterweight block with an elastic pad fixed at the lower end.

The elastic pad can be a rubber pad or a silica gel block, and the balancing weight can be a metal block.

The invention provides a method for testing the lip adhesion force of cigarette tipping paper, which is tested by using the test system of the first aspect, and the test method comprises the following steps:

attaching the tipping paper sample to be tested to the lower end part of the sample loading module 9, then connecting the sample loading module 9 with the rigid rope 4, and resetting the load force on the rigid rope 4;

placing the artificial lips right under the sample loading module 9;

the tribometer testing platform 1 controls the sample loading module 9 to descend, so that the artificial lips are in contact with the tipping paper sample to be tested, the contact area of the artificial lips and the tipping paper sample is 1.5cm by 1.5cm, then the rigid rope 4 is controlled to pull the sample loading module 9 to be separated from the artificial lips until the sample loading module is separated from the artificial lips at the moment after the contact is finished, the tribometer testing platform 1 controls the movement of the rigid rope 4 and records the maximum force on the rigid rope 4 during the testing period, and the force is recorded as lip adhesion force, and the value is F;

dividing the lip adhesion force grade and the lip adhesion performance according to the lip adhesion force, wherein the method comprises the following steps:

when F is more than or equal to 0N and less than 0.2N, determining that the lip adhesion force grade result is 0 grade, and the lip adhesion is expressed as a non-stick lip;

when F is more than or equal to 0.2N and less than 0.3N, determining that the lip adhesion force grade result is grade 1, and the lip adhesion is expressed as a slight lip adhesion;

when F is more than or equal to 0.3N and less than 0.5N, determining that the lip adhesion force grade result is grade 2, and the lip adhesion is represented as a medium lip adhesion;

when F is more than or equal to 0.5N and less than 0.6N, determining that the lip adhesion force grade result is grade 3, and the lip adhesion is represented as a heavy lip adhesion;

when F is more than or equal to 0.6N, the result of determining the lip adhesion force grade is 4 grade, and the lip adhesion is serious lip adhesion.

During the test, the maximum force on the rigid cord 4, i.e. the force at the moment when the tipping paper and the artificial lips separate; the force is then at its maximum, known as the lip stick force.

Alternatively, during testing, the tribometer test platform 1 records the force on the rigid cord 4 as a function of time and/or position and naturally marks the peak force, which is the lip stick force.

Because some tipping paper are perforated, when the width of the cutting tipping paper is 1.5cm, the perforated area can be avoided, and the test result is more accurate.

Preferably, the running speed of the rigid rope 4 is controlled to be 40-60 mm/min by the friction tester testing platform 1, and the contact time of the artificial lip and the tipping paper sample to be tested is 4-6 s.

More preferably, the running speed of the rigid rope 4 is controlled to be 50mm/min by the tribometer testing platform 1, and the contact time of the artificial lip and the tipping paper sample to be tested is 5-6 s.

Preferably, the method for attaching the tipping paper sample to be tested to the lower end part of the sample loading module 9 comprises the following steps: and adhering the tipping paper sample to be tested to the side edge of the counterweight block of the sample loading module 9, so that the middle of the tipping paper to be tested is completely attached to the elastic pad at the lower end of the sample loading module 9.

During testing, one side of the tipping paper sample to be tested is adhered to one side of the sample loading module 9 counter weight block, then the tipping paper sample to be tested is tensioned manually, the middle part of the tipping paper sample to be tested is completely attached to the elastic pad, and the other side of the tipping paper sample to be tested is adhered to the other side of the sample loading module 9 counter weight block. No adhesive is used to adhere the tipping paper to be tested to the elastic pad because: 1. the surface of the tipping paper to be tested is uneven after being adhered by the adhesive, so that the contact surface is uneven when the tipping paper is contacted with an artificial lip, and the test accuracy is influenced; 2. after the elastic pad is adhered with the adhesive, the weight change is large, and the mechanical test value is influenced; 3. if the adhesion binder on the elastic pad, inconvenient change is with connecing dress paper, and the clearance is unclean every time will influence next test to influence the test result.

Preferably, before the artificial lip is contacted with the tipping paper sample to be tested, artificial saliva is sprayed on the artificial lip.

Preferably, the removable cover support 12 is designed by a drawer-type process, and the removable cover 10 is loaded in the middle, so that the manual lip can be conveniently disassembled and assembled.

In the invention, the tipping paper for the cigarette is preferably placed on the shearing plate for shearing, and the width of the tipping paper sample to be tested after the shearing is finished is equal to the width of the sample loading module 9 of the testing equipment. The area of the upper surface of the artificial lip sample block must be consistent with the area of the bottom surface of the sample loading module 9. Gloves are worn in the operation process, so that the hands are prevented from being in direct contact with the test sample.

The technical scheme can be freely combined on the premise of no contradiction.

The invention has the following beneficial effects:

1. the invention provides a device and a method for testing the lip adhesion force of cigarette tipping paper, which can objectively and accurately detect the lip adhesion force of the cigarette tipping paper, effectively avoid fuzzy concepts such as lip adhesion, lip injury and the like obtained by traditional sensory evaluation, and avoid the defects of large influence of subjective factors, large difference of product suction results, harm to human health and the like.

2. According to the invention, through the normal operation of the testing equipment, the testing sample is fully contacted with the artificial lips, so that the lip adhesion force is obtained, the repeatability is good, the consistency with the artificial sensory evaluation is good, and the testing accuracy is high. The testing method is simple and feasible, and has certain advantages in material admission, quality control and product upgrading in the tobacco industry.

3. The method is rapid, objective and efficient, has good repeatability and simple operation, greatly saves the detection cost, improves the efficiency and is easy to popularize and apply.

Drawings

FIG. 1 is a front view of the test apparatus.

Fig. 2 is a right side view of the test apparatus.

Fig. 3 is a rear view of the test apparatus.

FIG. 4 is a diagram of the main interface of the test MAP software.

FIG. 5 is a detailed parameter interface diagram of the test MAP software.

The device comprises a friction meter testing platform, a force measuring sensor, a sensor transmission support, a rigid rope, a pulley supporting arm, a pulley fixing shaft, a sample loading module hook, a sample loading module, a movable cover plate, a bottom plate horizontal nut, a movable cover plate support and a bottom plate, wherein the friction meter testing platform is 1, the force measuring sensor is 2, the sensor transmission support is 3, the rigid rope is 4, the L-shaped pulley supporting arm is 5, the pulley supporting arm is 6, the pulley is 7, the pulley fixing shaft is 8.

Detailed Description

The present invention will be further described with reference to the following embodiments.

Example 1

1-5, a test system for the lip adhesion force of cigarette tipping paper comprises: artificial lips, test equipment, artificial saliva.

At the time of testing, the artificial saliva is sprayed on the test surface of the artificial lips.

The artificial lip uses a 3M low-viscosity adhesive tape, one surface of the artificial lip is high in viscosity, the other surface of the artificial lip is low in viscosity, the artificial lip is in contact with the tipping paper sample to be tested and is a low-viscosity surface, and a purchasing manufacturer is 3M China company Limited. The test apparatus includes:

the device comprises a tribometer testing platform 1, a force measuring sensor 2, a rigid rope 4, a pulley 6, a pulley bracket and a sample loading module 9.

The rigid cord 4 is a 0.2mm ultra-fine steel wire rope.

The load cell 2 is mounted on a sensor transmission bracket 3.

Wherein, install pulley 6 on the pulley support, rigidity rope 4 is in slide in the pulley 6, the both ends of rigidity rope 4 respectively through the snap ring with load cell 2 and dress appearance module 9 are connected.

The artificial lips are located directly below the sample application module 9 and the two are in contact in the test position. The artificial lips are mounted on an artificial lip stand, for example, the artificial lips are clamped and fixed on the artificial lip stand or are pasted on the artificial lip stand.

MAP software is installed in the tribometer test platform 1. The tribometer test platform 1 comprises: the friction meter comprises a friction meter host, a friction meter display screen, friction meter keys, an emergency button, a friction meter RS232 serial port, a friction meter USB interface, a friction meter power switch, a friction meter power jack and a sensor interface. Four angles installation a plurality of friction meter horizontal nut under 1 of friction meter test platform to guarantee the level of tester.

The tribometer testing platform 1 is in communication connection with the force sensor 2 through the sensor interface, and the tribometer testing platform 1 analyzes and processes data transmitted by the force sensor 2 through MAP software. The tribometer test platform 1 manipulates the movement of the rigid rope 4 by the MAP software and records the force on the rigid rope 4 as a function of time and/or position.

The sample loading module 9 is a metal block with a rubber pad fixed at the lower end, and a sample loading module hook 8 is arranged at the upper end of the sample loading module 9 and is used for being connected with a steel wire rope.

The specific design of artificial lip support as follows, it includes: the movable cover plate bracket 12 can be disassembled, and the movable cover plate bracket 12 is provided with a matched movable cover plate 10; the removable cover support 12 is detachably mounted on the base plate 13, for example, by screwing, plugging, etc. Bottom plate horizontal nuts 11 are mounted below the four corners of the bottom plate 13 to ensure the horizontality of the device. The removable deck carrier 12 includes: the bottom plate with screw holes, 4 bearing shafts and a top-loaded movable cover plate surface. The removable cover 10 is also readily removable from and insertable into the removable cover holder 12 for replacement of the artificial lips.

The specific design of pulley support as follows, it includes: a pulley fixing shaft 7, 2L-shaped pulley supporting arms 5 for horizontally fixing the pulley fixing shaft 7. The pulley fixing shaft 7 is detachably provided with a low-damping pulley 6 so that the superfine steel wire rope can run with a fixed track. The pulley support is installed on the friction meter test platform 1 through threaded connection.

The tribometer test platform 1 is substantially cuboid. The pulley support is arranged above the short edge of the friction meter test platform 1. And the force measuring sensor 2 is arranged above the long edge of the friction meter testing platform 1. The steel wire rope is L-shaped, the turning part of the L-shaped is realized by the pulley 6, the steel wire rope horizontally penetrates through the force measuring sensor 2 and the pulley 6, and the steel wire rope is vertically downwards connected with the sample loading module 9. The steel wire rope can be controlled to move at a certain speed by MAP software in the friction meter testing platform 1.

The tribometer test platform 1 can use existing tribometer test platforms, on which the methods of mounting the load cell 2 and the movable wire rope are known.

The thickness of the steel wire rope is not limited in the embodiment, and the steel wire rope can be used as long as the function of the steel wire rope can be realized.

A method for testing the lip adhesion force of tipping paper for cigarettes adopts the system for testing the lip adhesion force of the tipping paper for the cigarettes, and comprises the following steps:

step 1, cutting tipping paper for cigarettes, wherein the length of a tipping paper test sample is equal to the width of the tipping paper for the cigarettes, and the width of the test sample is equal to 1.5 cm;

step 2, attaching the cut tipping paper test sample to two sides of a square metal block of a sample mounting module 9 by using solid glue, and attaching a rubber pad at the lower end of the sample mounting module 9 in the middle of the tipping paper test sample by means of the tightening effect of the two sides of the tipping paper test sample, wherein the bottom area of the rubber pad is 1.5cm x 1.5 cm;

step 3, hanging a sample loading module 9 loaded with a tipping paper test sample on a clamping ring at one end of a steel wire rope through a sample loading module hook 8;

step 4, when the sample module 9 to be loaded is stable and does not float, resetting the load force on the rigid rope 4 through MAP software; sticking the high-viscosity side of the artificial lip 3M low-viscosity adhesive tape on the movable cover plate 10, enabling the low-viscosity side to face upwards, installing the movable cover plate 10 on the movable cover plate bracket 12, and spraying a layer of artificial saliva at 36.3 ℃ on the artificial lip;

step 5, the friction meter testing platform 1 controls the sample loading module 9 to be lowered to a preset contact position through MAP software, so that the tipping paper testing sample is in contact with the artificial lip for 6S, the contact area of the two is 1.5cm by 1.5cm, then after the contact is finished, the steel wire rope pulls the sample loading module 9 to slowly separate from the artificial lip until the moment of separation, the running speed of the steel wire rope is controlled to be 50mm/S, the maximum force and force curve distribution diagram on the steel wire rope can be recorded at the moment, and the maximum force value in the testing period is recorded as lip adhesion force;

step 6, cleaning the table top, taking off the tipping paper test sample from the sample loading module 9, repeatedly replacing the same batch of samples, continuously testing until the tenth derived data is analyzed, recording the average value of the lip adhesion force of 10 times of tests as the lip adhesion force of the sample, and taking the value as F;

and 7, dividing the lip adhesion force grade and the lip adhesion performance according to the lip adhesion force of the sample obtained in the step 6, wherein the method comprises the following steps:

And then repeating the steps 1-7, and testing 18 different batches or types of tipping paper marked as sample numbers 1-18. And meanwhile, evaluating the lip adhesion force grade of the tipping paper for the cigarettes according to the manual smoking evaluation result. The results of the summary tests are shown in table 1.

As can be seen from table 1, the lip adhesion rating of this example 1 is consistent with the manual evaluation result, and therefore the test apparatus and test method of the present invention have high accuracy.

TABLE 1 lip adhesion test results for cigarette tipping paper

Example 2

The test was carried out using the method of example 1, with the following differences: the artificial lips used a silicone block. Then, the steps 1 to 7 of the example 1 are repeated, 20 tipping papers of different batches or different models are tested according to the sample numbers 1 to 20, meanwhile, the degree of the lip adhesion force of the tipping paper for the cigarettes is evaluated according to the manual smoking evaluation result, and the summary test result is shown in the table 2.

As can be seen from table 2, the lip adhesion grade of this example 2 is consistent with the manual evaluation result, so the testing device and the testing method of the present invention have high accuracy, and the testing result is independent of the type of silica gel, and can be obtained by using a common silica gel.

TABLE 2 lip adhesion test results for cigarette tipping paper

Comparative example 1

The test was carried out as in example 1, with the following differences: the artificial lips are latex blocks. Then, the steps 1 to 7 of the example 1 are repeated, 5 tipping papers of different batches or different models are tested according to the sample number 1 to 5, meanwhile, the degree of the lip adhesion force of the tipping paper for the cigarettes is evaluated according to the manual smoking evaluation result, and the summary test result is shown in the table 3.

As can be seen from table 3, the lip adhesion rating of the comparative example is greatly different from the manual test results, and therefore, the test results are poor in repeatability, indicating that the selection of the manual lips plays an important role in the test accuracy.

TABLE 3 lip adhesion test results for tipping paper for cigarettes

Comparative example 2

The test was carried out as in example 1, with the following differences: the rubber pad below the sample loading module 9 is removed, and the metal block is directly used for testing.

And then repeating the steps 1-7 of the example 1, marking the tipping papers of 5 different batches or different models as sample numbers 1-5, and simultaneously evaluating the lip adhesion force grade of the tipping paper for the cigarettes according to the manual smoking evaluation result. The results of the summary tests are shown in table 4.

As can be seen from table 4, the lip adhesion rating of comparative example 2 is greatly different from the manual evaluation result, and thus, the test result is poor in reproducibility. This shows that the rubber pad is fixed under the sample loading module 9, which can greatly improve the test accuracy. The reason is that: the rubber pad is fixed below, so that the cigarette tipping paper and the sample loading module 9 are tightly attached together, and the data is more stable and the repeatability is better.

TABLE 4 lip adhesion test results for cigarette tipping paper

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A test system for lip adhesion of cigarette tipping paper, the test system comprising: artificial lips, test equipment;

the test apparatus includes: a tribometer testing platform (1), a force cell (2), a rigid rope (4), a pulley (6), a pulley bracket and a sample loading module (9),

the device comprises a pulley support, a rigid rope (4), a force-measuring sensor (2), a sample loading module (9) and a sample loading module (4), wherein the pulley support is provided with a pulley (6), the rigid rope (4) slides in the pulley (6), the rigid rope (4) is L-shaped, one end in the horizontal direction is connected with the force-measuring sensor, and the other end in the vertical direction is connected with the sample loading module (9);

the artificial lips are positioned right below the sample loading module (9) and are contacted with each other at a test position;

friction resistance testing software is installed in the tribometer testing platform (1), the tribometer testing platform (1) is in communication connection with the force measuring sensor (2), and the tribometer testing platform (1) controls the movement of the rigid rope (4) and records the change of force on the rigid rope (4) along with time and/or position.

2. The test system of claim 1, further comprising: artificial saliva that is sprayed onto a test surface of the artificial lips at the time of testing.

3. The test system of claim 1, further comprising: an artificial lip supporter on which the artificial lips are installed; a horizontal adjusting component is arranged below the artificial lip bracket.

4. The test system according to claim 1, characterized in that the rigid rope (4) is connected at both ends to the load cell (2) and the sample loading module (9) by means of a movable connection, respectively.

5. The testing system according to claim 1, wherein the sample loading module (9) is a weight block with an elastic pad fixed at the lower end.

6. A method of testing the lip adhesion of cigarette tipping paper, characterised in that it is tested using the test system of claim 1, the method comprising the steps of:

attaching the tipping paper sample to be detected to the lower end part of the sample loading module (9), then connecting the sample loading module (9) with the rigid rope (4), and resetting the load force on the rigid rope (4) at the moment;

placing the artificial lips directly under the sample loading module (9);

the tribometer testing platform (1) controls the sample loading module (9) to descend so that the artificial lips are in contact with the tipping paper sample to be tested, the contact area of the artificial lips and the tipping paper sample is 1.5cm by 1.5cm, then the rigid rope (4) is controlled to pull the sample loading module (9) to be separated from the artificial lips until the sample loading module is separated from the artificial lips, the tribometer testing platform (1) controls the movement of the rigid rope (4) and records the maximum force on the rigid rope (4) during testing, the force is recorded as lip adhesion force, and the value is F,

7. The test method according to claim 6, characterized in that the running speed of the rigid rope (4) is controlled by the tribometer test platform (1) to be 40-60 mm/s, and the contact time of the artificial lip and the tipping paper sample to be tested is 4-7 s.

8. A test method according to claim 6, characterised in that the tipping paper sample to be tested is applied to the lower end of the loading module (9) by: and adhering the tipping paper sample to be tested to the side edge of the counterweight block of the sample loading module (9), so that the middle of the tipping paper to be tested is completely attached to the elastic pad at the lower end of the sample loading module (9).

9. A test method according to claim 6, wherein artificial saliva is sprayed on the artificial lips before they are contacted with the tipping paper sample to be tested.