JP7389690B2 - Evaluation method for bending of bar-shaped cosmetics - Google Patents

Description

The present invention relates to a method for reproducing the bending of a bar-shaped cosmetic product such as a lipstick due to the vibrations applied during carrying and the load applied during application, and thereby evaluating the breakage of the bar-shaped cosmetic product in a daily actual usage environment. .

Bar-shaped cosmetics such as lipsticks may break or crack due to the load applied during application or the vibrations applied during transportation. Once the cosmetic is folded, in the case of a cosmetic container that employs a feeding mechanism, feeding failure may occur, such as the broken cosmetic separating when the container is folded down and cannot be accommodated in the sleeve.

Therefore, at the development stage of bar-shaped cosmetics, it is necessary to conduct a durability test against breakage during actual use. , testing of bending strength using a measuring device such as a rheometer (Patent Documents 3 and 4), or testing of twisting and cracking strength of cosmetics using a vibration tester (Patent Document 5).

However, in the case of practical use tests conducted by panelists, evaluations take time, and the force and motion applied during application vary depending on the evaluators, resulting in problems such as a lack of test reproducibility.

In addition, in tests that measure the breakage load using a measuring device such as a rheometer, the load is applied while fixing the cosmetic, but this is different from the way the load is applied during actual application. It was not appropriate to evaluate gender. In addition, by simply testing the breakage load, it is difficult to evaluate the breakage taking into account the vibrations that are applied to the cosmetic when it is normally carried.

Furthermore, in tests in which shocks are applied to cosmetics using a vibration tester, there is a problem in that the vibrations applied to cosmetics during transportation cannot be accurately reproduced.

Therefore, instead of using conventional testing methods and testing equipment, we simulate the bending caused by vibrations caused by people carrying it around and the load placed on bar-shaped cosmetics during application, and objectively evaluate its durability against bending during actual use. A method that could do this was desired.

JP2010-265255 JP2019-182816 JP2018-177765 JP2004-238381 JP2017-66091

Therefore, the present invention aims to objectively evaluate the durability of the cosmetic bar by setting conditions that can reproduce the breakage of the cosmetic bar during actual use, and applying a predetermined load to the cosmetic bar based on these conditions. The objective of the present invention is to provide a method for evaluating the breakage of bar-shaped cosmetics.

The present invention solves the above-mentioned problems and is a method for evaluating bending of a bar-shaped cosmetic material, which includes the following steps.
(1) A step of applying vibrations in a predetermined pattern consisting of a combination of at least two types of shocks with different intensities to the bar-shaped cosmetic stored in a cosmetic container (2) A step of lifting the bar-shaped cosmetic from the cosmetic container (3) ) A step of applying the cosmetic to an object while applying a constant load to the rod-shaped cosmetic. (4) A step of lowering the rod-shaped cosmetic into a cosmetic container.

Further, in the present invention, the vibrations applied to the rod-shaped cosmetic in the step (1) are comprised of shocks (weak) and shocks (strong) that are repeatedly given at different frequencies, and the frequency of the shocks (weak) is different from the shock (strong). This is a bar-shaped cosmetic breakage evaluation method that is set so that the frequency is higher than that of (strong).

Further, in the present invention, the step (3) includes reciprocating the bar-shaped cosmetic in a horizontal direction, reciprocating in the vertical direction, and applying a constant load to the bar-shaped cosmetic. This is a bar-shaped cosmetic breakage evaluation method characterized by applying the cosmetic to an object to be coated in an arbitrary pattern based on a combination of conveyances.

In addition, the present invention provides that the step (3) is performed by a rod-shaped cosmetic applicator that applies the cosmetic to the object while applying a constant load to the rod-shaped cosmetic, and the rod-shaped cosmetic application The device includes a conveying means capable of conveying the object to be applied in a specific direction and a moving section capable of reciprocating horizontally and vertically while holding the bar-shaped cosmetic. This is a method for evaluating breakage of a bar-shaped cosmetic material, characterized in that a load adjustment section is provided that includes a load adjustment means and a load measurement means.

The present invention also provides a bar-shaped cosmetic breakage evaluation method, characterized in that in the step (1), the impact (weak) is in the range of 0.5 to 2.5G and the impact (strong) is in the range of 3 to 6G. be.

Furthermore, the present invention is a method for evaluating folding of a bar-shaped cosmetic material in the step (3), characterized in that the object to be coated is an artificial leather covered with a gel-like sheet.

According to the method for evaluating breakage of bar-shaped cosmetics of the present invention, conditions are set that can reproduce the breakage caused by vibrations applied when carried by people, loads during application, etc., and a predetermined load is applied to the bar-shaped cosmetics based on these conditions. By doing so, it is possible to objectively evaluate the breakage of the bar-shaped cosmetic in a daily actual use environment. Furthermore, according to this evaluation method, all processes can be performed by machines, so it is possible to save costs, time, etc. required for the work.

FIG. 2 is a front view of a bar-shaped cosmetic application device used in the bar-shaped cosmetic breakage evaluation method of the present invention. The same plan view. FIG. 3 is a diagram schematically showing the operation mode of the rod-shaped cosmetic applicator.

Hereinafter, the method for evaluating folding of a bar-shaped cosmetic according to the present invention will be described in detail based on its embodiments. Note that the present invention is not limited to these embodiments in any way.

The method for evaluating folding of bar-shaped cosmetics of the present invention includes the following steps (1) to (4).
(1) A step of applying vibrations in a predetermined pattern consisting of a combination of at least two types of shocks with different intensities to the bar-shaped cosmetic stored in a cosmetic container (2) A step of lifting the bar-shaped cosmetic from the cosmetic container (3) ) A step of applying the cosmetic to an object while applying a constant load to the rod-shaped cosmetic. (4) A step of lowering the rod-shaped cosmetic into a cosmetic container. Each step will be explained below.

<Step (1)>
It is known that when people carry cosmetic sticks, they are subjected to constant small, weak vibrations and sudden strong vibrations. Therefore, in this step, a vibration testing machine applies a predetermined pattern of vibrations to the cosmetic bar housed in the cosmetic container, which reproduces the vibrations that occur when a person carries the product.

A preferred vibration pattern consists of a combination of at least two types of vibration with different intensities, particularly preferably a combination of shocks (weak) and shocks (strong) applied at different frequencies. The frequency of such shocks (weak) is set to be higher than the frequency of shocks (strong). More specifically, while shocks (weak) are applied repeatedly at a constant frequency, shocks (strong) are applied suddenly. given. Note that although the vibration pattern of this embodiment is composed of a combination of two types of strong and weak impacts, the intensity of the impact is not limited to two types, and for example, a vibration pattern may be a combination of three or more types of intensities.

In order to more accurately reproduce the vibrations when carried by people, it is preferable to set the impact (weak) in the range of 0.5 to 2.5G and the impact (strong) in the range of 3 to 6G. The frequency is preferably 60 to 200 times/min for impact (weak), 0.5 to 5 times/min for impact (strong), 90 to 150 times/min for impact (weak), and 1 to 2 times for impact (strong). times/min is more preferable. In addition, as a device for applying vibration, a cam vibration type vibration testing machine that converts the rotation of a motor into vibration using a cam can be used.In particular, two types of cams are used to generate shocks (strong) at different frequencies. A vibration tester that can apply a weak impact is preferred.

<Step (2)>
Generally, containers for bar-shaped cosmetics include a cylindrical sleeve capable of accommodating the bar-shaped cosmetic, and a lifting and lowering mechanism for loading and unloading the cosmetic from the sleeve. In this process, the bar-shaped cosmetic is lifted up from inside the sleeve to expose a part of the cosmetic from the sleeve, but the amount of cosmetic pulled out here is the same as in normal use, and is 2.0 to 3.0 mm. It is enough to expose it to some extent. This lifting operation may be performed by hand, but a known lifting/lowering device may also be used.

<Step (3)>
In this step, the cosmetic is applied to the object while a constant load is applied to the rod-shaped cosmetic. For such application work, a rod-shaped cosmetic application device (Japanese Patent Application No. 2019-56175) according to the present applicant's invention can be used. This rod-shaped cosmetic applicator will be explained below.

FIG. 1 is a front view of a rod-shaped cosmetic applicator 1, and FIG. 2 is a plan view thereof. As shown in the figure, the rod-shaped cosmetic applicator 1 includes a base 2, a support frame 31 and a support frame 32 vertically disposed on the base 2, a moving part 4 attached to the support frame 31, and a base 2. It comprises a conveying means 5 and a control means 6 disposed above.

The conveyance means 5 is provided so as to be able to convey the object to be coated in a specific direction (leftward arrow in FIG. 2). Further, the moving unit 4 is provided so as to be able to reciprocate in the horizontal direction (double arrows in FIG. 2) and up and down directions (double arrows in FIG. 1) while holding the bar-shaped cosmetic. The moving section 4 is provided with a load adjusting section 41 that includes means for adjusting the load applied to the bar-shaped cosmetic during application and means for measuring the load. The conveyance means 5 and the moving section 4 are controlled by a control means 6.

The operation by the control means 6 is basically performed by instructing an operation of an arbitrary pattern programmed in advance. Such arbitrary operations include, for example, the movement of the moving unit 4 and the conveying means 5, specifically, the distance, number of times, or movement speed (including acceleration) of the reciprocating movement of the horizontal moving unit 42, and the vertical movement of the elevating unit 43. It can be set by arbitrarily combining the number of times, the interval, the conveying speed (including acceleration), the direction, etc. of the conveying means 5.

FIG. 3 is an example of an operation mode programmed in the control means 6 in advance. In the figure, arrow X indicates the moving direction of the object to be applied, and arrow Y indicates the lateral moving direction of the rod-shaped cosmetic material, which is orthogonal to the moving direction X of the object to be applied. Further, arrow Z indicates the direction of movement of the rod-shaped cosmetic material in a direction perpendicular to the application surface of the object to be applied. Further, L indicates a line of a coating trace on the object to be coated.

In this operation mode, first, the lifting section 43 is lowered to bring the bar-shaped cosmetic into contact with the object to be applied (Z1). From that point, the bar-shaped cosmetic is moved to the left in the figure by the horizontal moving unit 42 (Y), and at the same time, the object to be applied is sent forward by the conveying means 5 (X). Due to the combination of these movements, a diagonal coating trace is left on the coating object from the ground contact start point to the lower left direction (L). When the bar-shaped cosmetic material moves to the left end, the bar-shaped cosmetic material A is raised (Z5), and the object to be applied is moved by a predetermined amount by the conveying means 5 while the bar-shaped cosmetic material is fixed at the same position. After this movement, the bar-shaped cosmetic material is lowered and grounded on the object to be applied again (Z6), the bar-shaped cosmetic material A is moved to the right side (Y), and the object to be applied is moved by the conveying means 5 (X). . In this way, the application operation of reciprocating from side to side is performed multiple times, and finally, the elevating part 43 is raised to separate the bar-shaped cosmetic from the object to be applied (Z2).

Note that the device used for the application work in this step is not limited to the rod-shaped cosmetic applicator 1, but can apply the cosmetic to the object while applying a constant load to the rod-shaped cosmetic. There is no particular limitation as long as it can be used.

The object to be coated used in this step is preferably artificial leather that reproduces human skin, and is particularly preferably one in which a gel-like sheet is placed under the artificial leather. As such a gel-like sheet, for example, a sheet made of polyurethane, a sheet made of silicone, or a layered sheet of silicone and polyurethane can be suitably used. Further, the compressive elastic modulus (Young's modulus) is preferably 10 to 30 Kpa, more preferably 15 to 20 Kpa. In this way, by using two layers of artificial leather and a gel-like sheet, it is possible to reproduce a more natural skin condition, and the way the stick-shaped cosmetic decreases after application is also different from that when applied to human skin. They are almost the same in shape.

<Step (4)>
In this step, the bar-shaped cosmetic is lowered into the sleeve and stored in the cosmetic container. This lifting operation may be performed by hand, but a known lifting/lowering device may also be used.

Each of the above steps (1) to (4) is repeated multiple times. In order to reproduce carrying around by an actual person, it is preferable to repeat steps (1) to (4) 10 to 30 times. After all the steps are completed, the bar-shaped cosmetic is evaluated for breakage. For example, when the bar-shaped cosmetic is lowered into the sleeve, it is possible to check for bends. That is, if the cosmetic is completely broken and broken in the middle, even if the cosmetic is moved down, the upper part of the broken part will not be moved down and will remain in the same position. Furthermore, it is possible to visually check whether or not there are any cracks in the container by drawing out the cosmetic from the container.

The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.

The evaluation target was a bar-shaped cosmetic product that was prone to breakage during the carrying test, and a bar-shaped (cylindrical) lipstick with a cutter load of 0.45 N, a diameter of 12 mm, and a length of 5 cm was prepared in a container that can be raised and lowered. did. Note that the lipstick's carrying test results show that the breakage rate is around 5 to 10%, so the aim is to reproduce the same rate of breakage.

<Step (1)>
Using a vibration tester that can apply shocks (strong) and shocks (weak) at different frequencies using two types of cams, a predetermined pattern of vibrations that reproduces the vibrations that occur when a person carries the product is applied to a cosmetic container. It was given to bar-shaped cosmetics. The applied impact (weak) is set in the range of 0.5 to 2.5G, and the applied impact (strong) is set in the range of 3 to 6G, the impact (weak) is set at 120 times/min, and the impact (strong) is set at 1 to 2 times/min. frequency was set. The vibration was applied for 15 minutes.

<Step (2)>
A bar-shaped cosmetic was raised from within the sleeve of the container using a lifting and lowering device to expose a portion of the cosmetic from the sleeve. The amount of cosmetic material fed out was 3 mm.

<Step (3)>
Using the bar-shaped cosmetic evaluation device 1 according to the present applicant's invention, the cosmetic was applied to an object under a constant load. As the object to be coated, a polyurethane gel sheet having a compressive modulus of elasticity of 10 to 20 Kpa was used under artificial leather Saprale ("Saprale" is a registered trademark, manufactured by Idemitsu Technofine). The operation mode of the bar-shaped cosmetic evaluation device in this application work is as shown in Fig. 3, the load applied to the cosmetic is 100 g, the speed of the cosmetic left and right reciprocating movement (Y) is 15 mm/s, and the movement of the object to be applied is 15 mm/s. (X) The speed was 40 mm/s and the coating distance was 50 mm.

<Step (4)>
Using a lifting and lowering device, the bar-shaped cosmetic was lowered into the sleeve and stored in the cosmetic container, and the state of damage such as folding of the cosmetic was checked.

The above steps (1) to (4) were repeated 28 times in total. As a result, two out of 25 pieces were confirmed to be bent. As a result, the occurrence rate of breakage of the bar-shaped cosmetic to be evaluated was 8%, which fully reproduced the rate of breakage of about 5 to 10%, which was the result of the carrying test of the product.

As described above, according to the bar-shaped cosmetic breakage evaluation method of the present invention, conditions are set that can reproduce the breakage caused by vibrations applied when carried by an actual person, load during application, etc., and based on these conditions, bar-shaped cosmetics are By applying a predetermined load to the cosmetic material, it is possible to objectively evaluate the breakage of the bar-shaped cosmetic material in a daily actual usage environment. Furthermore, according to this evaluation method, all processes can be performed by machines, so it is possible to save costs, time, etc. required for evaluation.

The method for evaluating breakage of stick-shaped cosmetics of the present invention can be suitably used for evaluating the durability of stick-shaped cosmetics typified by lip cosmetics, but the evaluation target is not limited to this. It can be widely applied to rod-shaped cosmetics used.

1... Bar-shaped cosmetic application device 2... Base 4... Moving part 5... Conveying means 6... Control means 31... Supporting frame 32... ... Supporting frame
41 ... ... Load adjustment section 42 ... ... Horizontal movement section 43 ... ... Lifting section 44 ... ... Bracket 51 ... ... Roller 52 ... ... Belt 61 ... ... Operation section 62 ... ... Display section 71 ... ... Lower heater 72 ... ... Upper heater 311 ... ... Strut 312 ... ... Horizontal bar 321 ... ... Strut 322 ... ... Horizontal bar 411 ... ... Arm section 412 ... ... Weight attachment section 413 ... ... Loading weight 414 ... ... Weight attachment section 415 ... ... Adjustment weight 416 ... ... Load cell 417 ... ... Holding part 441 ... ... Axial support A ... ... Bar-shaped cosmetic L ... ... Application trace line … … Vertical movement direction of bar-shaped cosmetics

Claims (6)

A rod-shaped cosmetic breakage evaluation method including the following steps.
(1) A step of applying vibrations in a predetermined pattern consisting of a combination of at least two types of shocks with different intensities to the bar-shaped cosmetic stored in a cosmetic container (2) A step of lifting the bar-shaped cosmetic from the cosmetic container (3) ) A step of applying the cosmetic to an object while applying a constant load to the rod-shaped cosmetic. (4) A step of lowering the rod-shaped cosmetic into a cosmetic container. The vibrations applied to the rod-shaped cosmetic in the step (1) above consist of shocks (weak) and shocks (strong) that are repeatedly given at different frequencies, and the frequency of shocks (weak) is higher than the frequency of shocks (strong). 2. The bar-shaped cosmetic breakage evaluation method according to claim 1, wherein the bar-shaped cosmetic breakage evaluation method is set to be high. The step (3) above involves a combination of reciprocating the bar-shaped cosmetic in the horizontal direction, reciprocating in the vertical direction, and transporting the object to be applied while applying a constant load to the bar-shaped cosmetic. 3. The method for evaluating bending of a bar-shaped cosmetic according to claim 1, wherein the cosmetic is applied to the object in an arbitrary pattern. The step (3) above is performed by a rod-shaped cosmetic application device that applies the cosmetic to the object to be applied while applying a constant load to the rod-shaped cosmetic. It is equipped with a transport means that can transport objects in a specific direction, and a moving part that can reciprocate horizontally and vertically while holding the bar-shaped cosmetic, and the moving part has a mechanism for adjusting the load applied to the bar-shaped cosmetic during application. 4. The rod-shaped cosmetic breakage evaluation method according to claim 1, further comprising a load adjustment section comprising means and load measuring means. The rod-shaped rod according to any one of claims 1 to 4, wherein in the step (1), the impact (weak) is in the range of 0.5 to 2.5G, and the impact (strong) is in the range of 3 to 6G. Cosmetic breakage evaluation method. 6. The method for evaluating folding of a bar-shaped cosmetic product according to claim 1, wherein in the step (3), the object to be coated is a gel-like sheet placed under artificial leather.

Images