JP6183810B2 - Cosmetic properties measuring device - Google Patents

Description

  The present invention relates to a cosmetic property measuring apparatus.

  The inventors of the present invention first supplied the foundation or mascara between the nip formed by the two rolls of the drive roll and the free rotating roll, and when the supplied foundation or mascara is split, We have invented a method for evaluating the performance of cosmetics by measuring the force in the direction perpendicular to the plane including both roll axes, and measuring and evaluating the tack value of the foundation or mascara (see, for example, Patent Documents 1 and 2).

  Patent Documents 1 and 2 include a measurement result of the tack value of the foundation or mascara measured by the method described in Patent Documents 1 and 2, and a sensory evaluation result of stickiness in actual use of the foundation or mascara by a specialized panelist. It has been reported that there is a high correlation between them, and according to the performance evaluation methods described in Patent Documents 1 and 2, it is possible to objectively evaluate the sticky feeling that has been difficult to evaluate with an apparatus.

JP 2005-106731 A JP 2008-70382 A

  According to the evaluation methods described in Patent Documents 1 and 2 described above, when evaluating cosmetics containing particles such as foundation or mascara, the measured tack value should be used for evaluation of the stickiness of the cosmetics. Can do. However, cosmetics that do not contain particles sometimes fail to obtain a good correlation between the measured tack value and stickiness.

  Accordingly, it is an object of the present invention to provide a cosmetic property measuring apparatus capable of eliminating the above-mentioned drawbacks of the prior art.

  As a result of intensive studies by the present inventors, the following has been found. That is, in the case of a general foundation or a mascara in the driving roll and the free rotating roll used in the evaluation method described in Patent Documents 1 and 2 described above, the effect of particles such as pigment contained in the gap between the nips Is difficult to slip, and the measured tack value can be used as it is for evaluation of the stickiness of cosmetics. However, it has been found that in cosmetics that do not contain such particles or the like, the gap between the nips is slippery, and as a result, it is difficult to find a correlation between the measured tack value and stickiness. Accordingly, various methods for measuring the force in the direction perpendicular to the plane including both roll shafts generated on the roll shaft are studied in the same manner as the evaluation methods described in Patent Documents 1 and 2 described above while reducing such slip. The present invention has been conceived.

  The present invention provides a physical property of a cosmetic for measuring the stickiness of the cosmetic by supplying a liquid or semi-solid cosmetic between nips formed by a drive roll and a free rotating roll arranged in parallel to each other. A groove perpendicular to the direction of the rotation axis is formed on the circumference of each of the drive roll and the free rotating roll over the entire circumference, and the gap between the nips is supplied by the groove. Further, the physical property measuring device for cosmetics divided into a physical property measuring region for measuring physical properties of the cosmetic material and a driving force transmitting region for driving the free rotating roll when the free rotating roll is in contact with the driving roll. Is to provide.

  According to the present invention, even when a cosmetic that easily causes slippage between the nips is evaluated using two rolls of a drive roll and a free rotating roll, for example, when the cosmetic is evaluated for stickiness, the supplied roll is supplied. It can measure and evaluate the tack value of cosmetics.

FIG. 1 (a) is a conceptual diagram showing the main part of a measuring apparatus according to an embodiment of the present invention before measurement, and FIG. 1 (b) is a schematic diagram of the measuring apparatus according to an embodiment of the present invention. It is a conceptual diagram which shows the measurement state of a part. FIG. 2 is a perspective view of two rolls, which are the main part of the measuring apparatus shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III shown in FIG.

Hereinafter, an apparatus for measuring physical properties of a cosmetic according to the present invention will be described based on preferred embodiments with reference to FIGS.
As shown in FIG. 1A, a cosmetic physical property measuring apparatus 10 (hereinafter also referred to as “measuring apparatus 10”) of the present embodiment has a driving roll 1 and a free rotating roll 2 arranged in parallel to each other. This is a measuring device that supplies a liquid or semi-solid cosmetic 5 between the nips 3 formed by the above method and measures the tack value of the cosmetic 5. The measuring device 10 has the driving roll 1 and the free rotating roll 2, and in addition to the driving roll 1 and the free rotating roll 2, the cosmetic 5 is spread evenly and thinly on the driving roll 1 as a third roll. A film thickness control roll 4 is provided.

  In the measuring apparatus 10 of the present embodiment, as shown in FIGS. 2 and 3, the drive roll 1 and the free rotation roll 2 have substantially the same length in the rotation axis direction (X direction). As shown in FIG. 1A, the driving roll 1, the free rotating roll 2 and the film thickness control roll 4 are each rotated by a shaft (not shown) of the measuring apparatus 10 via a hinge or an arm. It is attached as possible. Further, the rotation axis of the drive roll 1 and the free rotation roll 2 are arranged in parallel with each other, and the rotation axis of the drive roll 1 and the film thickness control roll 4 is arranged in parallel with each other.

  The drive roll 1 is a metal roll, and a motor (not shown) is attached to the shaft portion, and is driven to rotate at a predetermined speed. Moreover, the drive roll 1 has a temperature adjusting device (not shown) for keeping the roll at a constant temperature. As for the size of the driving roll 1, the diameter D1 (see FIG. 3) is preferably about 50 mm to 120 mm, and the length L1 (see FIG. 3) in the rotation axis direction (X direction) is about 50 mm to 250 mm. Is preferred.

The free rotating roll 2 is a roll made of an elastic member such as rubber. In the measuring apparatus 10, as shown in FIGS. 1 and 2, the free rotating roll 2 is arranged above the driving roll 1 so as to contact the driving roll 1. Yes. By being arranged in this way, the free rotating roll 2 rotates according to the rotation of the driving roll 1 by the action of the frictional force due to contact with the driving roll 1. A rotating arm 22 is attached to the free rotating roll 2 at both ends of its shaft portion. A weight is disposed on the lower end of the rotating arm 22 opposite to the free rotating roll 2. A sensor (not shown) that detects a change in angle around the rotation shaft 22 a (coaxial with the drive roll) of the rotation arm 22 is attached to the rotation arm 22. The angle of the rotating arm 22 detected by the sensor (not shown) is the torque applied to the rotating shaft 22a via the rotating arm 22 by the force generated in the free rotating roll 2 as a drag force caused by liquid splitting, and the rotating shaft 22a. This corresponds to the inclination angle of the rotating arm 22 at a position balanced with the torque generated on the same rotating shaft 22a by lifting the weight on the opposite side. That is, if this angle is large, it indicates that the force applied to the free rotating roll 2 by the splitting of the liquid is large. The sensor (not shown) detects this angle and outputs it to a control device (not shown). A control device (not shown) is a force applied in a direction perpendicular to a plane including the rotating shaft 2a of the free rotating roll 2 and the rotating shaft 1a of the driving roll 1 based on the detection result of the sensor (tensile force due to stickiness), That is, the tack value (relative value) of the cosmetic that is the measurement target can be calculated. The size of the free rotating roll 2 is preferably about 50 mm to 120 mm in diameter D2 (see FIG. 3), and the length L2 (see FIG. 3) in the rotation axis direction (X direction) is about the same as that of the driving roll 1. It is preferable that In FIG. 1B, the swing of the rotating arm 22 is drawn large so that the movement can be easily understood. However, in actual measurement, the swing is not so large.
In addition to the method of measuring the angle for lifting the weight as described above, the force applied to the free rotating roll 2 is a method of detecting the force in the direction perpendicular to the rotational axis of the free rotating roll using a load cell. It may be used.

The free rotating roll 2 made of an elastic member preferably has a hardness that can absorb the thickness of the cosmetic 5 spread evenly and thinly on the drive roll 1 in a physical property measurement region MT, which will be described later. Is preferably a rubber roll having a rubber hardness (hereinafter simply referred to as “hardness”) of 40 ° or more and 80 ° or less, and more preferably a rubber roll having a hardness of 40 ° or more and 70 ° or less. . Further, the hardness is changed between a region between a pair of grooves 21 and 21 described later (a region that becomes a physical property measurement region MT) and a region that is outside each groove 21 (a region that becomes a driving force transmission region DT). May be. For example, the hardness of the region between the pair of grooves 21 and 21 (the region that becomes the physical property measurement region MT) is made lower than the hardness of the region outside the respective grooves 21 (the region that becomes the driving force transmission region DT). As a result, the driving roll 1 and the free rotating roll 2 in the driving force transmission region DT come into contact with each other and a frictional force is likely to be generated, so that the free rotating roll 2 is reliably rotated along with the driving roll 1.
On the other hand, an area between the pair of grooves 21 and 21 (area that becomes the physical property measurement area MT) and an area outside the grooves 21 (area that becomes the driving force transmission area DT) are made of the same material, and the grooves are simply If only the structure is cut, the assembly of the apparatus becomes easy.

  The driving roll 1 and the free rotating roll 2 will be described in further detail. As shown in FIGS. 2 and 3, the driving roll 1 and the free rotating roll 2 are arranged on a plane including the rotation axis direction (X direction) on the peripheral surfaces thereof. Grooves 11 and 21 extending in a direction perpendicular to the direction (perpendicular to the rotation axis direction (X direction)) are formed over the entire circumference. The drive roll 1 and the free rotating roll 2 will be described in more detail. As shown in FIG. 2, the groove 11 of the drive roll 1 is formed on the drive roll 1 in pairs in the measuring apparatus 10. Specifically, a pair of grooves 11 and 11 are formed with a constant width over the entire circumference at both ends of the drive roll 1 in the rotation axis direction (X direction).

  The ratio (W1 / L1) of the width W1 (see FIG. 3) of the groove 11 to the length L1 in the rotation axis direction (X direction) of the drive roll 1 is applied on the drive roll 1 using, for example, the film thickness control roll 4. When the material 5 is spread evenly and thinly, it is preferably 0.005 or more and 0.15 or less from the viewpoint of making it difficult to spread in the driving force transmission region DT beyond the physical property measurement region MT described later. More preferably, it is 0.1 or less. Specifically, the width W1 of the groove 11 is preferably 1 mm or more and 19 mm or less, and more preferably 2 mm or more and 13 mm or less. Furthermore, from the same viewpoint, the ratio (d1 / D1) of the depth d1 (see FIG. 3) of the groove 11 to the diameter D1 of the drive roll 1 is preferably 0.01 or more, and is 0.02 or more. More preferably. Specifically, the depth d1 of the groove 11 is preferably 1 mm or more, and more preferably 2 mm or more.

  In addition, a pair of grooves 21 and 21 are formed with a constant width over the entire circumference at both ends of the rotary shaft 2 in the rotation axis direction (X direction). As shown in FIG. 2, the pair of grooves 21, 21 of the free rotating roll 2 are located at positions corresponding to the pair of grooves 11, 11 of the drive roll 1, that is, the pair of grooves 11, 11. It is formed on a free rotating roll 2 arranged in parallel to the driving roll 1 so as to correspond to a position formed in the rotational axis direction (X direction) of the driving roll 1.

  In the measuring device 10, as shown in FIG. 3, the width W <b> 2 of the groove 21 of the free rotating roll 2 is formed to be the same as the width W <b> 1 of the groove 11 of the drive roll 1, but the groove 11 of the drive roll 1. The width W1 may be different from the width W1. Specifically, the width W2 of the groove 21 is preferably 1 mm or more and 19 mm or less, and more preferably 2 mm or more and 13 mm or less. When the width W2 of the groove 21 of the free rotating roll 2 is different from the width W1 of the groove 11 of the driving roll 1, the width W2 of the groove 21 of the free rotating roll 2 is greater than the width W1 of the groove 11 of the driving roll 1. It is preferable that the edge of the groove 11 is in contact with the surface of the free rotating roll 2. Moreover, in the measuring apparatus 10, as shown in FIG. 2, the depth d2 of the groove 21 of the free rotating roll 2 is formed to the same depth as the depth d1 of the groove 11 of the drive roll 1, but the drive It may be formed to a depth different from the depth d1 of the groove 11 of the roll 1.

  The nip 3 between the drive roll 1 and the free rotating roll 2 that are formed as described above and arranged in parallel with each other is formed by grooves 11 and 21 of the supplied cosmetic 5 as shown in FIG. It is divided into a physical property measuring region MT for measuring physical properties and a driving force transmission region DT for driving the free rotating roll 2 when the free rotating roll 2 is in contact with the driving roll 1. Hereinafter, the measuring device 10 will be described in detail. As described above, the driving roll 1 and the free rotating roll 2 have substantially the same lengths L1 and L2 in the rotation axis direction (X direction) as shown in FIG. It is formed to the same length. Here, “substantially the same length” means that the length L1 of the drive roll 1 in the rotation axis direction (X direction) is 97% or more of the length L2 of the rotation axis direction (X direction) of the free rotation roll 2; It means 100% or less.

  Further, in the measuring apparatus 10, as shown in FIG. 3, the pair of grooves 11 and 11 of the drive roll 1 and the pair of grooves 21 and 21 of the free rotating roll 2 have the same width W1 at positions corresponding to each other. , W2, at both ends of the rotation axis direction (X direction) of the drive roll 1 or both ends of the rotation axis direction (X direction) of the free rotation roll 2, preferably within 15% of the total roll length from the roll end, more preferably Is formed within 10%. Therefore, in the measuring apparatus 10, the physical property measurement region MT between the nips 3 is formed between the pair of grooves 11 and 11 formed in the drive roll 1, and further, the pair formed in the free rotating roll 2. Are formed between the grooves 21 and 21, and are preferably a region longer than 50% (wide), more preferably a region longer than 60% of the total length L1 of the drive roll 1. More specifically, the physical property measurement region MT between the nips 3 is formed between the inner ends of the pair of grooves 11, 11 formed in the drive roll 1, and is further paired with the pair of free rotation rolls 2. It is formed between the inner ends of the grooves 21 and 21.

  Further, in the measuring apparatus 10, as shown in FIG. 3, the driving force transmission region DT between the nips 3 is more outward in the rotation axis direction (X direction) than the pair of grooves 11, 11 formed in the driving roll 1. Further, it is formed outward of the pair of grooves 21 and 21 formed in the free rotating roll 2 in the rotation axis direction (X direction). More specifically, the driving force transmission region DT between the nips 3 is formed outside the outer end of each groove 11 formed in the driving roll 1 in the rotation axis direction (X direction), and further formed in the free rotation roll 2. The groove 21 is formed outward in the rotation axis direction (X direction) from the outer end of each groove 21.

  As shown in FIG. 1A, the film thickness control roll 4 included in the measuring device 10 is arranged in front of the drive roll 1 so as to contact the drive roll 1. The film thickness control roll 4 can also spread the cosmetic 5 evenly and thinly on the drive roll 1 by reciprocating between the pair of grooves 11 formed on the drive roll 1. it can. However, when a reciprocating mechanism is used for the film thickness control roll 4, the roll width and the reciprocating movement width are set so that the contact surface with the driving roll 1 does not contact the driving force transmission regions DT at both ends of the driving roll 1. Need to be set. The film thickness control roll 4 is rotated together with the drive roll 1 by the action of frictional force caused by contact with the drive roll 1.

The diameter of the film thickness control roll 4 is preferably smaller than the diameter D1 of the drive roll 1, and specifically, it is preferably about 35 mm to 80 mm. The length of the film thickness control roll 4 in the rotation axis direction (X direction) is substantially the same as the length L1 (see FIG. 3) of the drive roll 1 in the rotation axis direction (X direction) when a reciprocating mechanism is not used. Preferably they are the same. On the other hand, when a reciprocating mechanism is used, it is preferable that the driving roll 1 has a length obtained by adding a reciprocating motion width (a swing width to one side). When the length in the rotation axis direction (X direction) of the film thickness control roll 4 is substantially the same as the length L1 of the drive roll 1, the position corresponding to the pair of grooves 11 and 11 of the drive roll 1 is It is preferable that a pair of grooves is formed on the peripheral surface of the film thickness control roll 4. The film thickness control roll 4 is preferably a rubber roll having a hardness of 40 ° to 80 °.
When the reciprocating motion is used for the film thickness control roll 4, the length of the region between the pair of grooves of the film thickness control roll 4 in contact with the physical property measurement region MT of the drive roll 1 and the width of the grooves on both sides are: Due to the reciprocal movement, the groove is formed so that this region does not contact the driving force transmission region DT of the driving roll 1 and the physical property measurement region MT of the driving roll 1 does not contact the driving force transmission region DT of the film thickness control roll 4. It is necessary to set the width, position and width of the reciprocating motion.

As the cosmetic 5 to be measured supplied between the nips 3, liquid or semi-solid cosmetics are widely cited. However, the apparatus of the present invention is substantially free of particles and is placed between the nips 3. It can also be preferably used for measurement of cosmetics that easily cause slipping.
However, the particles herein are specifically organic pigments, inorganic pigments, glitter pigments, and the like, and among these, organic pigments include azo-based, polyazo-based, pigments, and the like. Examples of inorganic pigments include carbon powders such as acetyl carbon and graphite, synthetic silica, iron oxide, titanium oxide, cobalt oxide, manganese oxide, copper oxide, zinc oxide, and clay minerals such as mica. Examples of the luster pigment include pearl pigments. Examples of the cosmetics include liquid foundations, UV care agents, creams, cosmetic liquids, skin cosmetics such as antiperspirant coating liquids, nail cosmetics such as nail enamel, and hair cosmetics.

  The supply amount of the cosmetic 5 supplied between the nips 3 is such that the thickness of the cosmetic 5 spread evenly and thinly on the drive roll 1 is preferably 1 μm or more and 30 μm or less, and 1.5 μm or more More preferably, it is 20 μm or less.

Next, a method for measuring the tack value using the measuring apparatus 10 of the present embodiment will be described, and the operational effects of the measuring apparatus 10 will be described.
First, as shown in FIG. 1 (a), the drive roll 1, the free rotation roll 2 and the film thickness control roll 4 are rotated at a predetermined initial rotation speed before the cosmetic is supplied, that is, before the measurement state. And maintain at a predetermined temperature. Specifically, the drive roll 1 is rotated by a motor (not shown) attached to the shaft portion, and the drive roll 1 is rotated. At that time, the free rotation roll 2 and the film thickness control roll 4 that are in contact with the drive roll 1 are rotated together with the drive roll 1 by the action of the frictional force with the drive roll 1. In addition, the drive roll 1, the free rotation roll 2, and the film thickness control roll 4 are arranged so that the rotation axes thereof are parallel to each other. Even if the rolls 1, 2, and 4 are rotated, before the cosmetic is supplied. In this state, an equilibrium state is maintained.

  Next, a predetermined amount of cosmetic material whose tack value is to be measured is supplied between the drive roll 1 and the film thickness control roll 4 using a pipette (not shown) or the like. Then, the supplied cosmetic 5 is spread evenly and thinly on the peripheral surface of the drive roll 1 by the film thickness control roll 4. At that time, the groove 11 is formed on the entire circumference of the drive roll 1, and the groove 21 is also formed on the circumference of the free rotating roll 2. It is difficult for the cosmetic 5 spread on the circumferential surface of 1 to extend beyond the groove 11 of the drive roll 1 and the groove 21 of the free rotating roll 2. In the measuring apparatus 10 of this embodiment, as shown in FIG. 2, a pair of grooves 21 and 21 are further formed over the entire circumference at both ends in the rotation axis direction (X direction) of the free rotating roll 2. Therefore, the cosmetic 5 spread on the peripheral surface of the drive roll 1 passes through the grooves 11 and 11 at both ends of the drive roll 1 and the grooves 21 and 21 at both ends of the free rotation roll 2 and rotates in the direction of the rotation axis (X Direction) It is harder to spread outward. Thus, in the measuring apparatus 10 of the present embodiment, the cosmetic 5 spread on the peripheral surface of the drive roll 1 spans between the inner ends of the pair of grooves 11, 11 of the drive roll 1. And it is easy to spread thinly equally over the perimeter of the drive roll 1.

  Therefore, in the measuring apparatus 10, as shown in FIG. 3, the nip 3 between the drive roll 1 and the free rotating roll 2 arranged in parallel with each other is supplied by the grooves 11, 21, and the cosmetic 5 supplied. Are divided into a physical property measurement region MT for measuring the physical properties of the material and a driving force transmission region DT for driving the free rotating roll 2 by contacting the free rotating roll 2 with the driving roll 1. As described above, when the nip 3 is divided into the physical property measurement region MT and the driving force transmission region DT, the free rotating roll 2 comes into contact with the driving roll 1 at the nip 3 in the driving force transmission region DT, for example, particles. Even if slippery cosmetics that do not contain water are supplied, the free rotating roll 2 can be reliably rotated along with the driving roll 1 by the action of the frictional force with the driving roll 1. In particular, in the measuring apparatus 10 of the present embodiment, the nip 3 between the drive roll 1 and the free rotating roll 2 that are arranged in parallel to each other includes the inner ends of the pair of grooves 11 and 11 and the pair of grooves 21 and 21. 21 is a physical property measurement region MT between the inner ends of the rotating roll direction (X direction) beyond the outer ends of the grooves 11 of the drive roll 1 and the grooves 21 of the free rotating roll 2. A portion outside the rotation axis direction (X direction) beyond the outer end is a driving force transmission region DT. Therefore, in the measuring apparatus 10 of the present embodiment, the outer surface of the drive roll 1 on the outer side of the outer end of each groove 11 of the drive roll 1 is more outward than the outer end of each groove 21 of the free rotating roll 2. Even if the surface of the part of the free rotating roll 2 comes into contact and the cosmetics without particles are supplied, the frictional force between the free rotating roll 2 and the driving roll 1 works symmetrically in a balanced manner, and the free rotating roll 2 Can be smoothly and reliably carried along with the drive roll 1.

Next, the drive roll 1, the free rotation roll 2 and the film thickness control roll 4 are rotated at a predetermined rotational speed for measurement. Then, as shown in FIG. 1B, the cosmetic 5 that passes through the physical property measurement region MT in the nip 3 between the drive roll 1 and the free rotation roll 2 includes the drive roll 1 and the free rotation roll 2. The force required for splitting the cosmetic 5 is generated at the rotation outlet. The free rotating roll 2 to which the force required for the splitting is applied detects an angle at a position in equilibrium with the torque around the central axis 22a due to the weight of the weight through a rotating arm 22 by a sensor (not shown). . The angle of the rotating arm 22 measured by the sensor (not shown) is output to a control device (not shown), and the tack value is calculated by the control device (not shown). Thus, in the measuring apparatus 10 of this embodiment, the tack value of the supplied cosmetic can be measured regardless of the presence or absence of particles by simply providing the grooves 11 and 21 in the drive roll 1 and the free rotating roll 2. . Further, since the grooves 11 and 21 are simply provided in the driving roll 1 and the free rotating roll 2, it is not necessary to provide other control devices and driving devices, and the apparatus is not complicated.
As described in Patent Documents 1 and 2, there is a high correlation between the measurement result of the tack value of cosmetics by such a measuring device 10 and the sensitivity evaluation result of stickiness in actual use of cosmetics by a specialized panelist. Since there is, stickiness can be objectively evaluated.

The physical property measuring device for cosmetics of the present invention is not limited to the measuring device 10 of the above-described embodiment, and can be changed as appropriate.
For example, in the measurement apparatus 10 described above, as shown in FIG. 3, the length of the drive roll 1 in the rotation axis direction (X direction) and the length of the free rotation roll 2 in the rotation axis direction (X direction) are substantially the same. However, it may be different.
Further, each of the drive roll 1 and the free rotating roll 2 is formed with a pair of grooves 11 and 21, but may be formed one by one. When the grooves 11 and 21 are formed one by one, the groove 11 of the drive roll 1 and the groove 21 of the free rotating roll 2 are formed at positions corresponding to each other in the rotation axis direction (X direction). It is preferable. When the grooves 11 and 21 are formed one by one, in the nip 3 between the drive roll 1 and the free rotating roll 2, one of the rotation axis directions (X direction) is measured with the grooves 11 and 21 as a boundary. The region MT and the other become the driving force transmission region DT.

  Moreover, in the above-described measuring apparatus 10, as shown in FIG. 2, the pair of grooves 21 and 21 of the free rotating roll 2 are formed at positions corresponding to the pair of grooves 11 and 11 of the drive roll 1. , It does not have to be formed at the corresponding position. When the pair of grooves 21 and 21 of the free rotating roll 2 are not formed at positions corresponding to the pair of grooves 11 and 11 of the driving roll 1, the physical property measurement region MT and the driving force transmission region DT between the nips 3 are: Determination is made based on the pair of grooves 11 and 11 of the drive roll 1.

  Moreover, in the above-mentioned measuring apparatus 10, as shown to Fig.1 (a), in addition to the drive roll 1 and the free rotation roll 2, it has the film thickness control roll 4 as a 3rd roll, Is not essential, that is, the film thickness control roll 4 may not be provided. Further, instead of the film thickness control roll 4, a blade, a film, or the like may be provided.

DESCRIPTION OF SYMBOLS 10 Measuring apparatus 1 Drive roll 11 Groove 2 Free rotation roll 21 Groove 22 Rotating arm 23 Torque sensor 3 Between nip MT Physical property measurement area DT Drive force transmission area 4 Film thickness control roll 5 Cosmetics

Claims (3)

A device for measuring physical properties of cosmetics, which supplies liquid or semi-solid cosmetics between nips formed by drive rolls and free rotating rolls arranged in parallel to each other and measures the tack value of the cosmetics. There,
Grooves perpendicular to the rotation axis direction are formed over the entire circumference on the peripheral surfaces of the drive roll and the free rotating roll,
Between the nips, a physical property measurement region for measuring physical properties of the cosmetic supplied by the groove, and a driving force transmission region for driving the free rotating roll when the free rotating roll comes into contact with the driving roll. A device for measuring physical properties of cosmetics that have been classified.   The apparatus for measuring physical properties of a cosmetic according to claim 1, wherein the cosmetic is a cosmetic substantially free of particles. The drive roll and the free rotating roll have substantially the same length in the rotation axis direction,
The grooves are formed in pairs on each of the drive roll and the free rotating roll,
The physical property measurement region between the nips is formed between a pair of grooves formed in the drive roll,
The device for measuring physical properties of cosmetics according to claim 1 or 2, wherein the driving force transmission region between the nips is formed outward from a pair of grooves formed in the driving roll.

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