JP2006288468A - Powder puff - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cut/welded powder puff having a sufficient high adhesion strength to endure frequent rub-washing at the welded joint, no burr at a side welded part, and soft texture even if the side surface of the puff is used. <P>SOLUTION: The powder puff is obtained by cutting/welding a laminate of an inner core and an application material, and has no projection or projection line caused by a hardened molten material at the joint on the periphery of the laminate, and the ratio (B/A) of the friction resistance value (B) of the joint to the friction resistance value (A) of a cosmetic application surface is 1.0-1.5. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fusing / welding type cosmetic puff having a core and a coating material. More specifically, the welded joint has a high adhesive strength that can withstand stubborn washing many times, and there are no burrs on the puff side welds, giving the skin a soft touch even when using the puff side. For puffs.

Conventionally, when a cosmetic material is applied to the skin surface with a puff, in order to perform a fine work such as an uneven portion, it is generally performed to use not only the puff application surface but also the puff side surface.
However, if the puff used is a fusing / welding type conventional puff that uses a heated mold, so-called “burrs” are likely to occur on the side of the puff, and there is a problem of pain on the skin surface even if the puff is not rubbed against the skin. there were. Accordingly, the present inventors have disclosed Japanese Patent Application No. 2003-335068 (Patent Document 1) regarding a cosmetic puff obtained by fusing and welding a base material on which sponge sheets of the same or different types are laminated by an ultrasonic heating method. Proposed.
The feature of this technique is that the substrates are bonded to each other while maintaining the practical strength without excessively heating the bonded portion by an ultrasonic heating device incorporating an electric sensor in the portion of the cutting blade.
Practicality was explored for the puffs produced with this technology, but there is an advantage that burrs are not formed at the joints and the same feel as the coated surface can be obtained. Therefore, the development of a cosmetic puff having a stronger bonding strength is required.

  On the other hand, various proposals have been made on a welding type puff having an improved bonding strength at the joint. For example, Japanese Utility Model Laid-Open No. 55-008489 (Patent Document 2) discloses a liquid cosmetic coating puff having a structure in which a heat-meltable film is sandwiched in the center of a base and a synthetic resin film is formed on both outer surfaces. Is described. According to this technology, the joining portion has a structure in which the heat-meltable film, the synthetic resin film, and the substrate are completely melted, so-called burrs appear on the puff side surface, and the puff side surface is not suitable for coating at all. In the process, there was a defect that air leakage failure was likely to occur. Further, since the coated surface is the synthetic resin film, it has no liquid retention property and is not suitable for application of liquid cosmetics.

  Furthermore, Japanese Patent Laid-Open No. 10-313938 (Patent Document 3) describes a cosmetic puff in which the adhesive strength of the joint portion is improved by using a welding sheet on the inner peripheral edge portion. The welded sheet must be formed into a donut shape and placed on a target site, which makes it difficult to position accurately, making the manufacturing process very complicated, and causing defects. In addition, the welded part is the innermost part, which is likely to cause poor bonding, and the cloth material that is the coating material is folded inward to provide a `` drawer ''. there were.

Japanese Patent Application No. 2003-335068 Japanese Utility Model Publication No. 55-008489 Japanese Patent Laid-Open No. 10-313938

In view of the above-mentioned problems, the present inventors have conducted intensive studies, and as a result of fusing and welding joining using ultrasonic waves, by inserting a specific hot melt sheet in a specific laminated configuration, the bonding strength at the bonded portion While improving the durability to withstand repeated repeated shampooing and washing over a long period of time, the side surface of the joined puffs does not cause burrs due to the protrusion of the melt due to the thermal melting of the material used like conventional puffs. It is an object to provide a cosmetic puff having a soft feeling.
It is another object of the present invention to provide a fusing / welding type cosmetic puff that does not cause poor bonding due to air leakage or poor appearance such as blistering in the bonding part by fusing / welding.
Furthermore, in addition to the above quality improvement, another object is to provide a cosmetic puff having excellent liquid blocking properties for application of liquid cosmetics such as liquid foundations and cosmetic lotions.

That is, the present invention is based on the following configuration.
(1) In an appropriately shaped cosmetic puff comprising a laminate of a core and coating materials on both sides, a breathable hot melt sheet is bonded to one or both sides between the core and the coating material, and a peripheral portion Is melted and welded to form a joint, and the joint is not formed with projections or ridges due to the molten solid, and the friction resistance value (B) of the joint and the cosmetic coating surface A cosmetic puff having a friction resistance value (A) ratio (B / A) in the range of 1.0 to 1.5.
(2) The cosmetic puff according to (1), wherein the air permeability of the breathable hot melt sheet is 0.5 to 500 cm ³ / cm ² / sec as defined in JIS L1096.
(3) The cosmetic puff according to (2), wherein the core is a sponge sheet or a nonwoven fabric.
(4) The coating material on both sides of the core is the same or different material selected from the group of sponge sheet, flocked sheet, flocked hot melt sheet, napped cloth or synthetic leather (1) The cosmetic puff according to any one of to (3).

The cosmetic puff of the present invention has a high welding strength at the joint around the puff, is excellent in sag-washing resistance, and the joint does not peel off even if used while scouring repeatedly over a long period of time. Furthermore, even if washing and dehydration are repeated with various instruments, the joint portion does not peel off and is excellent in durability.
In addition, the cosmetic puff of the present invention has a high bonding strength as described above, while the welded portion of the material due to heat melting is included in the molten bonded portion, and as a result, protrudes to the outside of the side surface of the puff and protrudes or protrudes. No burr can be formed, soft to the touch, no pain even when used for a long time by people with soft skin, and excellent durability.
Furthermore, since the cosmetic puff of the present invention can utilize the side surface of the puff as an application part, a fine work can be performed even in a portion where the unevenness of the face is large, and no cosmetic smear is produced.
Furthermore, in fusing and welding to form a puff shape, air that is easily blocked by the internal space is well escaped to the outside. Since there is no puncture, there is a remarkable effect in improving the yield.

Hereinafter, preferred embodiments of the present invention will be described in detail.
The cosmetic puff of the present invention has a structure in which coating materials are laminated on both sides of a center core.
The core used in the present invention is used for imparting appropriate rebound resilience, stiffness or volume feeling necessary for use as an applicator.
The material for the core is not particularly limited, but is preferably a sponge sheet, woven fabric, knitted fabric, or non-woven fabric. Sponge sheets and non-woven fabrics are particularly preferable in terms of economy. A known material is sufficient as a material for forming such a material. For example, various rubbers such as nitrile rubber (NBR), chloroprene rubber (CR), styrene butadiene rubber (SBR), polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT) And polyamides such as various nylons, polyurethanes, and celluloses. These can be blended or copolymerized for use. In the case of a sponge sheet, the cell structure has various forms such as closed cells, open cells, or a mixed type thereof. What is necessary is just to set a density (or porosity) to the predetermined range by control of the expansion ratio in a manufacturing process according to the objective.
A sponge sheet having low rebound resilience can also be used. When the core is a nonwoven fabric, the thickness, basis weight, and density are not particularly limited.

Next, the coating material used in the present invention is a coating that can stably hold various cosmetics such as powdery cosmetics, liquid cosmetics, liquid foundations, pastes or creams on the surface, and can easily move the cosmetics to the skin surface. If it is the material which has a function, it will not specifically limit. The sheet material used as the coating material is preferably selected from the group consisting of a sponge sheet, a flocked sheet, a flocked hot melt sheet, a napped fabric, and a synthetic leather. The coating material on one side and the other side of the core may be the same, the same type, or different types.
When using a sponge sheet as the coating material, the same material as the core may be used, or it may be different. The flocking sheet is obtained by flocking the surface of a substrate by a method such as electrostatic flocking. The base material, the type of flocking, and the characteristics are not limited. The raised fabric is a woven fabric, a knitted fabric, a non-woven fabric, or a woven fabric, a knitted fabric or a non-woven fabric having a raised surface. What can be used as a synthetic leather is not specifically limited, There exist a suede-like synthetic leather, a nubuck-like synthetic leather, or a leather with silver.

The puff of the present invention has a structure in which a breathable hot melt sheet is laminated and bonded between the core and the coating material. The reason is that even when different materials are used by inserting the hot melt sheet between the core and the coating material, the laminate can be reliably joined.
The breathable hot melt sheet is preferably inserted to improve the mechanical strength of the puff and has a structure in which the core and the coating material are bonded to each other. Adhesion is performed by, for example, hot roll treatment, hot press, hot air treatment, or other preliminary heating means. At this time, it may be adhered over the entire surface or may be partial adhesion. Due to the air permeability, such adhesion is performed well.
Further, the reason why the hot melt sheet needs to have air permeability is to make it easy to escape air that tends to remain in the internal space when compression is applied in a subsequent joining process by fusing and welding. If there is no air permeability, air is trapped, and appearance defects such as blisters are generated, or when external pressure is applied, puncture and repellency are likely to occur. The air permeability is preferably in the range of 0.5 to 500 cm ³ / cm ² / sec as defined by JIS L1096. If the air permeability is less than 0.5 cm ³ / cm ² / sec, air leakage will be poor, and it will be easy to cause defects in the bonding process. If the air permeability exceeds 500 cm ³ / cm ² / sec, the air leakage will be good, but the bonding strength Is insufficient, or when liquid cosmetics are used, the cosmetics penetrate too far into the interior and are not economical. The air permeability is preferably about 1 to 450 cm ³ / cm ² / sec, more preferably about ³ to 400 cm ³ / cm ² / sec. As long as the air permeability is within this range, the material is not particularly limited.
What can be preferably used as the above-mentioned breathable hot melt sheet includes a perforated hot melt film such as a punching film, a perforated film, and a mesh film, a hot melt nonwoven fabric, and paper. The average hole diameter of the perforated hot melt film is preferably about 0.5 to 3 mm. The hole shape and hole diameter distribution are not particularly limited.

In the case of a nonwoven fabric, there are arbitrary forms such as spun bond, melt blow, spun lace, carding web or needle punch felt, paper, and the like. The thickness before bonding is not particularly limited, but it is preferable to use a thin material of about 0.05 to 0.5 mm in consideration of thermal conductivity. The basis weight in the case of a nonwoven fabric is preferably about 10 to 100 g / m ² .

  The hot melt sheet is made of polyamides, polyesters, polyethylene, polypropylene, ethylene / propylene copolymers, ethylene-vinyl acetate copolymers, polyolefins such as isobutylene, various rubbers such as butyl rubber and nitrile rubber, and epoxy. Non-woven fabric composed of fibers made of low-melting polymers such as silicone-modified epoxy, acrylic-modified epoxy-based epoxy, silicones, polyvinylidene chloride, polyurethanes, ionomers, etc. A nonwoven fabric containing components can be used. The form of the hot melt sheet is not particularly limited. From the viewpoint of processability and handleability, the melting point of these materials is preferably about 60 to 130 ° C. This is because if the melting point is less than 60 ° C., the adhesiveness at room temperature increases and the workability and handleability deteriorate, and if it exceeds 130 ° C., it becomes difficult to improve the bonding strength. Preferably, it is about 70-120 degreeC. Among these, polyamide-based, polyurethane-based, and rubber-based materials are particularly preferable in that they have welding stability with a coating material and a core and stretchability.

The hot melt sheet inserted between the core sheet and the coating material may be only on one side of the core sheet, or may be laminated on both sides. Preferably, the reinforcing effect is enhanced by bonding to both sides of the core sheet.
The breathable hot melt sheet is firmly bonded to the core and the coating material at least at the welded portion on the side surface of the puff. When other parts are also joined to each other, the durability represented by the stubborn washability can be significantly improved.

The cosmetic puff of the present invention is manufactured by fusing and welding in a necessary and sufficient time by using an internal heating means using ultrasonic waves or high frequency and controlling the heating time with a sensor provided at the fusing edge. It is. Therefore, since it is not melted excessively, the burrs are not projected to the outside. In the conventional fusing / welding technique using a heating blade by an external heating method, burrs are generated. Even if the internal heating means uses ultrasonic waves or high frequencies, burrs are likely to occur without the control of the sensor.
By such means, it is formed into the shape of a cosmetic puff. The molding shape is not particularly limited, and can be molded into an arbitrary shape such as a circle, an ellipse, or an eccentric shape.

  The cosmetic puff of the present invention has no burr at the joint on the side surface of the puff and has no feeling of catching. Therefore, the cosmetic puff gives the skin a soft feel equivalent to that of the coated surface, and is also suitable for makeup of soft skin people. Is. The frictional resistance value corresponding to the feel when rubbing the skin is the ratio (B / A) when the frictional resistance value of the coated surface is (A) and the frictional resistance value of the puff side surface joint is (B). However, it regulates to the range of 1.0-1.5. If it is out of this range, it is easy to feel uncomfortable in the application work, and uneven application of cosmetics is likely to occur.

(Example)
The invention is explained in more detail by means of examples.

Between two coating materials (2 mm thick NBR latex sponge) 2, ^two polyurethane hot melt nonwoven fabrics 3 (manufactured by Nihon Miractoran) with a basis weight of 25 g / m ² and a core sheet 1 having a thickness of 5 mm The laminated base material of FIG. 1A in which the polyurethane sponge was inserted was prepared.
The laminated base material is preheated through a hot air heating device, and the hot melt sheet 3, the core sheet, and the coating material are thermally bonded to each other, and then an ultrasonic oscillation horn jig is provided, and the upper and lower sides (the upper side is a punched metal blade) It was inserted into an ultrasonic welder having an energization circuit between the molds.
At the same time as the tip of the punched metal blade touched the lower mold, the sensor sensed and the ultrasonic oscillation stopped instantaneously. The pressing was continued with the ultrasonic oscillation stopped.
The obtained cosmetic puff has a fusion structure in which the fusion part is not exposed at all and is contained in the joint part, and the coating material and the core sheet are firmly joined by the hot melt nonwoven fabric 3. It was. An enlarged photograph of the joint is shown in FIG. 2, and a schematic enlarged view thereof is shown in FIG.
Even if cosmetics were applied to the skin using the side of the puff, the touch was soft and fine application work was possible. The average ratio of the friction resistance value (A) of the coated surface and the friction resistance value (B) of the joint is 1.10 ((B / A) of each sample; 1.10, 1.09, 1.08, 1.12, 1.11, 1.12, 1.13, 1.07 1.08, 1.11).
With the obtained sponge puff, when applying cosmetics, even if the side of the puff is used, a soft and gentle touch can be obtained, there is no sense of incongruity in use, and uneven application of the cosmetics does not occur. As shown in the figure, the coating property was excellent even in a portion with severe irregularities. Even if this cosmetic puff was used over a long period of time and repeated washing and washing, the joint did not peel off and the durability was remarkably excellent.

As a coating material, a polyurethane hot melt nonwoven fabric 3 having a weight per unit area of 25 g / m ² (Expansione UHO- manufactured by Kanebo Fibers Co., Ltd.) is placed between an NBR latex sponge 2 having a thickness of 2 mm and a synthetic leather 4 having a thickness of 1.5 mm. A laminated base material of FIG. 1B was prepared by inserting 2 sheets of 25 ”thickness 0.2 mm) and 5 mm thick polyurethane sponge as the core sheet 1.
The base sheet is preheated through a heated roll type heating device with adjusted clearance, and the hot melt sheet 3, the core sheet, and the coating material are entirely thermally bonded to each other, and then the ultrasonic horn of Example 1 is provided. Inserted into an ultrasonic welder.
Using the ultrasonic welder shown in Example 1, the sensor sensed at the same time that the tip of the punched metal blade contacted the lower mold, and the ultrasonic oscillation was stopped instantaneously. The pressing was continued with the ultrasonic oscillation stopped.
The obtained cosmetic puff has a fusion structure in which the fusion part is not exposed at all and is enclosed in the joint part, and the coating material and the core sheet are firmly joined by the hot melt nonwoven fabric. .
Moreover, even if cosmetics were applied to the skin using the puff side surface, the touch was soft and fine application work was possible. The average ratio of the friction resistance value (A) of the coated surface and the friction resistance value (B) of the joint is 1.04 ((B / A) of each sample; 1.05, 1.03, 1.04, 1.02, 1.06, 1.05, 1.06, 1.02 1.03, 1.05).
When applying cosmetics with the obtained sponge puff, even if the puff side surface is used, a soft and skin-friendly feel can be obtained, and there is a sense of incongruity, as in Example 1. There was no coating unevenness, and the coating property was excellent even in places with unevenness, such as around the nose. Even if this cosmetic puff was used over a long period of time and repeated washing and washing, the joint did not peel off and the durability was remarkably excellent.

As a coating material, a polyamide hot melt nonwoven fabric 3 (manufactured by Nitto Boseki Co., Ltd.) having a weight per unit area of 24 g / m ² between a cotton velvet 2 mm thick (uses nylon for ground yarn) 6 and a polyurethane sponge 2 2 mm thick. A laminated base material of FIG. 1C was prepared by inserting 2 sheets of PQA1001 (thickness 0.1 mm) and 5 mm thick polyurethane sponge as the core sheet 1.
The substrate sheet was preheated through a hot roll heating device with adjusted clearance, and the hot melt sheet, the core sheet, and the coating material were thermally bonded to each other, and then the ultrasonic horn of Example 1 was provided. Inserted into an ultrasonic welder.
Using the ultrasonic welder shown in Example 1, the sensor sensed at the same time that the tip of the punched metal blade contacted the lower mold, and the ultrasonic oscillation was stopped instantaneously. The pressing was continued with the ultrasonic oscillation stopped.
The obtained cosmetic puff has a fusion structure in which the fusion part is not exposed at all and is enclosed in the joint part, and the coating material and the core sheet are firmly joined by the hot melt nonwoven fabric. .
Moreover, even if cosmetics were applied to the skin using the puff side, the touch was soft and fine application work was possible. The average ratio of the frictional resistance value (A) of the coated surface and the frictional resistance value (B) of the joint is 1.29 ((B / A) of each sample; 1.25, 1.27, 1.31, 1.35, 1.29, 1.27, 1.31, 1.28. 1.30, 1.27).
When applying cosmetics with the obtained sponge puff, even if the side of the puff is used, a soft and skin-friendly feel similar to that of Example 1 can be obtained, and there is a sense of incongruity or uneven application of cosmetics. It was excellent in coating properties even in areas with unevenness, such as around the nose. Even if this cosmetic puff was used over a long period of time and repeated washing and washing, the joint did not peel off and the durability was remarkably excellent.

As a coating material, a polyamide hot-melt non-woven fabric 3 (made by Nitto Boseki Co., Ltd.) having a basis weight of 24 g / m ² between a cotton velvet 3 mm thick (polyethylene terephthalate is used for the ground yarn) 6 and a polyurethane sponge 2 2 mm thick. A laminate substrate (laminated configuration is shown in FIG. 1D) was prepared by inserting 2 pieces of “PQA1001” 0.1 mm thick) and a needle punched nonwoven fabric 7 having a thickness of 2 mm as a core sheet.
This base sheet is preheated through a hot roll type heating device with adjusted clearance, and the hot melt sheet, the core, and the coating material are thermally bonded to each other entirely, and then the ultrasonic horn equipped with the ultrasonic horn of Example 1 is used. Inserted into sonic welder.
As in Example 1, the sensor sensed the tip of the die-cutting metal blade in contact with the lower die, and the oscillation of the ultrasonic wave was stopped instantaneously. The pressing was continued with the ultrasonic oscillation stopped.
The obtained cosmetic puff was fused without being exposed at all at the joint, and the coating material and the core sheet were firmly joined by the hot melt nonwoven fabric.
Moreover, even if cosmetics were applied to the skin using the side surfaces, the touch was soft and fine application work was possible. The average ratio of the friction resistance value (A) of the coated surface and the friction resistance value (B) of the joint is 1.21 ((B / A) of each sample; 1.23, 1.20, 1.21, 1.19, 1.25, 1.17, 1.21, 1.23 1.19, 1.22).
With the resulting sponge puff, when applying cosmetics, even if the side is used, a soft and skin-friendly feel is obtained, and there is no sense of incongruity or application unevenness. It was excellent in applicability even in severe areas. Even when this cosmetic puff was used for a long period of time and the shampoo washes repeatedly, the joint did not peel off, and the durability was remarkably excellent.

[Comparative Example]
A base material having the same laminate structure as in Example 1 was inserted into an ultrasonic welder equipped with the ultrasonic horn of Example 1 except that a polyurethane hot-melt nonwoven fabric having a basis weight of 25 g / m ² was not inserted.
As in Example 1, the sensor sensed the tip of the die-cutting metal blade in contact with the lower die, and the oscillation of the ultrasonic wave was stopped instantaneously. The pressing was continued with the ultrasonic oscillation stopped.
The obtained cosmetic puff was a fusion that was enclosed in the joint without exposing the fusion. The average ratio of the friction resistance value (A) of the coated surface and the friction resistance value (B) of the joint is 1.17 ((B / A) of each sample; 1.10, 1.24, 1.18, 1.15, 1.16, 1.15, 1.18, 1.19. 1.23, 1.11).
This sponge puff is bonded on the outer surface. When the cosmetic is applied, the sponge puff is soft and gentle to the skin, and there is no problem with scumming and washing resistance in short-term use. As shown in FIG. 2, since the hot melt sheet was not reinforced, the joint part peeled off after repeated shampooing for a long period of time, resulting in no durability.

It is a schematic diagram which shows the laminated structure of the cosmetic puff of this invention. It is a schematic diagram which shows the laminated structure of the cosmetic puff of this invention. It is a schematic diagram which shows the laminated structure of the cosmetic puff of this invention. It is a schematic diagram which shows the laminated structure of the cosmetic puff of this invention. 2 is a cross-sectional photograph of the vicinity of the joint portion of the cosmetic puff of Example 1. FIG. It is a model enlarged view of the said part (the inside of a circle in a figure shows a junction part). It is an expanded cross-sectional photograph of the joint part vicinity after long-time use of the cosmetic puff of a comparative example. In the schematic enlarged view of the part, the blank part indicates adhesion failure.

Explanation of symbols

1 Core sheet (sponge sheet)
2 Sponge sheet 3 Breathable hot melt sheet 4 Synthetic leather 6 Standing fabric 7 Core sheet (nonwoven fabric)

Claims (4)

  In an appropriately shaped cosmetic puff composed of a laminate of the core and the coating material on both sides, a breathable hot melt sheet is bonded to one side or both sides between the core and the coating material, and the peripheral portion is fused. A welded portion is formed by welding, and a frictional resistance value (B) of the jointed portion and a frictional resistance value of the cosmetic application surface are not formed on the jointed portion without forming protrusions or protrusions due to the molten solid matter. A cosmetic puff wherein the ratio (B / A) of (A) is in the range of 1.0 to 1.5. Cosmetic puff according to claim 1 in which the air permeability of the breathable hot melt sheet, characterized in that it is a air permeability 0.5~500cm ³ / cm ² / sec defined in JIS L1096.   The cosmetic puff according to claim 1 or 2, wherein the core is a sponge sheet or a nonwoven fabric. The coating material on both sides of the core is the same or different material selected from the group of sponge sheet, flocked sheet, flocked hot melt sheet, napped fabric or synthetic leather. A cosmetic puff according to any one of the above.