KR20180091774A - Manufacturing method of nbr puff - Google Patents

Abstract

The present invention relates to a method for producing a coated NBR puff with a thermoplastic polyurethane (TPU) film membrane, and specifically, to a method for producing a coated NBR puff with a TPU film membrane, in which a cosmetic composition is not absorbed into the inside of the puff, so that the elasticity of the puff is maintained, and the cosmetic composition is uniformly applied to the skin and sticks well.

Description

TECHNICAL FIELD [0001] The present invention relates to a film NBR puff having a TPU (Thermoplastic Polyurethane) film formed thereon,

The present invention relates to a coated NBR puff having a TPU film formed thereon and a process for producing the same. More particularly, the present invention relates to a TPU film for forming a TPU film, Film NBR puff having a film formed thereon and a method of manufacturing the same.

In general, a foundation in a cosmetic composition for color cosmetics is a representative color cosmetic material which conceals defects of the skin and exhibits a makeup effect of natural skin tone, and can be divided into powder foundation, solid foundation, oily foundation and emulsion type foundation according to the formulation.

The foundation must be applied to the area to be applied without clinging closely, and of course, it is made by touching so as to satisfy a feeling of emotional use. In this case, the foundation puff is used.

Conventionally used puffs are made of a porous material such as a cloth or sponge that has fine bristles formed on the contact portion of the surface of the skin, so that the liquid cosmetic material is excessively impregnated into the inside of the puff, and the consumption of the cosmetic material is very large. In addition, cosmetics that are excessively absorbed into the puff are only applied to the skin, and a considerable amount of the cosmetic may remain in the puff, causing bacteria to reproduce and causing skin troubles. The cosmetic remaining on the puff may be deteriorated or hardened, The durability of the puff is deteriorated.

In recent years, there has been a demand for the development of cosmetic puffs that do not absorb cosmetics due to the problem that cosmetic products are absorbed into conventional cosmetic puffs while cushion cosmetics are widely used. Korean Patent Publication No. 10-2016-0148377 discloses a prior art related to this.

The prior art relates to silicone puffs, wherein the outer surface of the cosmetic puff is formed of a non-absorbent fabric of silicone material so that the cosmetic is not impregnated inside the puff, facilitating the cleaning of the puff and preventing excessive consumption of the cosmetic . However, the prior art cosmetic puff has a high manufacturing cost, has difficulty in mass production, has a low flexibility and stretchability of silicone, and has a hard feeling upon contact with the skin. And there is a problem that the cosmetic composition is clumped and applied.

DISCLOSURE OF THE INVENTION In order to solve the above-mentioned problems, the present inventors have made a study to develop a cosmetic puff which does not absorb the cosmetic composition and which allows the cosmetic composition to be applied uniformly and without clumping on the skin, A cosmetic puff which has been sealed by attaching TPU (Thermoplastic polyurethane) film to the inside of the puff prevents the cosmetic composition from being absorbed into the inside of the puff to maintain the elasticity of the puff, and the cosmetic composition is applied evenly and tightly , The present invention has been completed.

An object of the present invention is to provide a coated NBR puff in which a cosmetic composition is not absorbed into the puffs, and the elasticity of the puff is maintained and the cosmetic composition is applied to the skin uniformly and firmly.

In order to achieve the above object, the present invention provides a coated NBR puff in which a cosmetic composition is not absorbed into the puff to maintain the elasticity of the puff, and a cosmetic composition is adhered to the skin, .

The coated NBR puff having the TPU film according to the present invention prevents the cosmetic composition from being impregnated into the puff, thereby maintaining the elasticity of the puff and applying the cosmetic composition uniformly and without lump.

Further, the puff of the present invention has an effect of preventing the cosmetic composition from being absorbed into the puff, preventing excessive consumption of the cosmetic composition, and preventing skin troubles caused by the remaining cosmetic composition.

1 is a flowchart of a method for manufacturing a coated NBR puff in which a TPU film according to the present invention is formed.
2 is a cross-sectional view of a coated NBR puff having a TPU film formed according to the method of the present invention.
FIG. 3 is an embodiment of a coated NBR puff formed with a TPU film film produced by the manufacturing method according to the present invention.

Hereinafter, a coated NBR puff having a TPU film according to the present invention and a method of manufacturing the same will be described in detail with reference to the drawings.

1 is a flowchart of a method for manufacturing a coated NBR puff in which a TPU film according to the present invention is formed. The production method of the present invention preferably includes but is not limited to the following steps.

A method for producing a coated NBR puff in which a TPU film according to the present invention is formed is characterized in that a liquid NBR (nitrile butadiene rubber), titanium dioxide, a vulcanizing agent, a vulcanizing accelerator, a foam stabilizer, an antibacterial agent, a viscosity modifier, And stirring (S10); (S20) of injecting a coagulant into the agitated raw material in the step (S10), mixing and then performing foaming molding using a foaming machine; A vulcanizing step (S30) of vulcanizing the product foam-molded in the vulcanizing step in the step (S20); (S40) of forming a coating NBR (nitrile butadiene rubber) sponge by washing and drying the vulcanized product in the step S30 in which a coating is formed on the surface of the product after the step S30. (S50) of attaching a TPU (Thermoplastic Polyurethane) film to both sides of a coated NBR (nitrile butadiene rubber) sponge of step S40; And a step (S60) of sealing the edges of the NBR (nitrile butadiene rubber) sponge with TPU (Thermoplastic Polyurethane) film to a predetermined shape at the same time as cutting the SBR in step S50.

The manufacturing method of the present invention will be described separately for each step.

First, a step (S10) of mixing a liquid NBR (nitrile butadiene rubber) with titanium dioxide, a vulcanizing agent, a vulcanizing accelerator, an air bubble stabilizer, an antibacterial agent, a viscosity adjusting agent, an oxidative stabilizer and a dispersing agent, and mixing and stirring is carried out. The raw materials are put into the stirrer and mixed and stirred at a speed of 30 to 100 rpm. If the speed is less than 30 rpm, the respective raw materials are not mixed uniformly. If the speed is more than 100 rpm, particles of liquid NBR (nitrile butadiene rubber) may be broken.

The titanium dioxide is mixed with nitrile butadiene rubber (NBR), dimolin butadiene rubber (NBR), titanium dioxide, a vulcanizing agent, a vulcanization accelerator, a foam stabilizer, an antimicrobial agent, Is 0.5 to 2% by weight based on the total weight of the composition. If the content of the titanium dioxide is less than 0.5 wt%, the coating film is not uniformly formed on the outer surface of the nitrile butadiene rubber (NBR) sponge and the coating film is sticky, and the TPU film is uniformly attached to the outer surface of the nitrile butadiene rubber There is a problem that defects occur. If the content of the titanium dioxide exceeds 2% by weight, there is a problem that the titanium dioxide remains in the coating of a nitrile butadiene rubber (NBR) sponge and the TPU film is not adhered.

The vulcanizing agent may be selected from among sulfur (S), selenium (Se) and tellurium (Te), and the content of the vulcanizing agent is preferably 1.5 to 4 By weight. When the content of the vulcanizing agent is less than 1.5% by weight, the elasticity of the nitrile butadiene rubber sponge is lowered. When the vulcanizing agent is more than 4% by weight, the nitrile butadiene rubber (NBR) sponge is changed into a hard state, There arises a problem that the elastic restoring force is not obtained.

The vulcanization accelerator may be at least one selected from zinc diethyldithiocarbamate, zinc salt of 2-mercaptobenzothiazole, EZ, MZ or zinc oxide (ZnO) The content of the vulcanization accelerator is preferably 1 to 7% by weight based on the total weight of the composition of the NBR (nitrile butadiene rubber) sponge. If the content of the vulcanization accelerator is less than 1 wt%, the vulcanization temperature and time can not be shortened. If the content of the vulcanization accelerator is more than 7.0 wt%, the vulcanization process proceeds too fast and the coating of the nitrile butadiene rubber .

The bubble stabilizer is added to a Trimene base (Ethane, chloro-, polymer with ammonia and formaldehyde) or Core Tex TNM-14S (Polyalkylene Glycol Derevatives), and the content of the bubble stabilizer is NBR (nitrile butadiene rubber) Is added in an amount of 0.5 to 2% by weight based on the total weight of the composition. If the content of the foam stabilizer is less than 0.5% by weight, fine bubbles generated when mixing and stirring the raw materials can not be removed. If the content of the foam stabilizer is more than 2% by weight, discoloration may occur on a nitrile butadiene rubber sponge.

The antimicrobial agent may be a gold nanocolloid solution, a silver nanocolloid solution, or a metal nanocolloid solution coated with a silicon oxide, but the present invention is not limited thereto. In the metal nanocolloid solution coated with the silicon oxide, the metal may be at least one selected from the group consisting of Au, Ag, Pt, Pd, Ru, Fe, Cu, Co) or nickel (Ni) may be selected and used.

The viscosity modifier may be selected from the group consisting of casein, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose and liquid paraffin. The viscosity adjusting agent may be selected from the group consisting of casein, sodium carboxymethyl cellulose, hydroxypropyl methyl cellulose, The content of the viscosity modifier is preferably 0.01 to 1% by weight based on the total weight of the composition of the NBR (nitrile butadiene rubber) sponge. If the content of the viscosity modifier is less than 0.01 weight, the viscosity of the nitrile butadiene rubber (NBR) sponge is low and the elasticity of the nitrile butadiene rubber (NBR) sponge is lowered, the coating is not formed on the outer surface of the nitrile butadiene rubber (NBR) sponge, When the amount is more than 1% by weight, the nitrile butadiene rubber (NBR) sponge is changed into a hard state, and a sufficient elastic restoring force is not obtained when a certain pressure is applied.

The oxidation stabilizer may be of a kind commonly used in the art, and the content of the oxidation stabilizer is preferably 0.2 to 1% by weight based on the total weight of the composition of the NBR (nitrile butadiene rubber) sponge. If the content of the oxidizing stabilizer is less than 0.2% by weight, the chemical reaction of the liquid NBR and oxygen can not be inhibited, and the inherent physical properties of the liquid NBR are lost to form a film on the outer surface of the NBR sponge. And the effect is insignificant.

Sodium Butylnaphthalene Sulfonate or Tamol-N dispersant may be used as the dispersant. However, the dispersant is not limited thereto, and any of conventionally used types may be used. The content of the dispersant is preferably 0.1 to 0.2% by weight based on the total weight of the composition of the NBR (nitrile butadiene rubber) sponge. If the content of the dispersant is less than 0.1% by weight, the liquid NBR (nitrile butadiene rubber) and other materials may not be uniformly dispersed. If the content of the dispersant exceeds 0.2% by weight, molecules of the dispersant may form a spherical or rod- Thereby causing instability of NBR (nitrile butadiene rubber) particles.

After the coagulant is added to the agitated raw material in the step (S10), the raw material is mixed and foamed using a foaming machine (S20). The foam molding step S20 is performed at 25 to 35 DEG C for 5 minutes to 1 hour.

The coagulant may be selected from the group consisting of sodium silicate, bentonite, and sodium alginate. The content of the coagulant may be 0.5 to 5 wt% based on the total weight of the composition of the NBR (nitrile butadiene rubber) %. If the amount of the coagulant is less than 0.5% by weight, the liquid NBR (nitrile butadiene rubber) and other raw materials are not effectively coagulated. If the coagulant is more than 5.0% by weight, the nitrile butadiene rubber (NBR) sponge is aged.

The vulcanizing step (S30) of vulcanizing the foamed molded article in the vulcanization step is performed in the step (S20). The vulcanizer is a device for vaporizing the vulcanizing agent injected in the step S10 into a gas and converting the foam molded product into an elastic material such as rubber.

The foamed molded article is vulcanized at 85 to 105 DEG C for 40 to 65 minutes in a vulcanizer. If the temperature is less than 85 ° C, the vulcanization time becomes long, and the foamed molded product does not have sufficient elasticity. If the temperature exceeds 105 ° C, the foamed molded product may burn or discolor. If the vulcanization time is less than 40 minutes, the foamed molded article is not sufficiently vulcanized to have elasticity specific to rubber. When the vulcanization time exceeds 65 minutes, the molded article is exposed to excessive heat for a long time, .

After the step (S30), the vulcanized product has a coating formed on its surface.

In step S30, the vulcanized product is washed and dried to form a coated NBR (nitrile butadiene rubber) sponge (S40).

The coated NBR sponge preferably has a thickness of 3 to 12 mm. If the thickness of the coated NBR sponge is less than 3 mm, the flexibility of the puff according to the manufacturing method of the present invention is high and the cosmetic composition can be applied to the periphery of the nose and the like finely. However, since the thickness of the puff is too thin, There is a falling problem. If the thickness of the coated NBR sponge is more than 12 mm, the thickness of the puff according to the manufacturing method of the present invention becomes too thick, so that the pressure applied at the time of using the puff is not sufficiently transmitted to the skin adhesive surface, There is a problem that a force greater than necessary is applied when using the puff.

A TPU (Thermoplastic polyurethane) film is attached to both surfaces of a film NBR (nitrile butadiene rubber) sponge of step S40 (S50).

The step of attaching the film (S50) is preferably performed by placing the TPU film on both sides of a coated NBR sponge and passing the film through rollers at 100 to 140 DEG C for 5 to 20 seconds to attach the TPU film to the NBR sponge. If the temperature of the roller is less than 100 ° C or the time of passing through the roller is less than 5 seconds, the heat of the roller is not sufficiently transferred and the TPU film and the film NBR sponge are not uniformly adhered, Lt; 0 > C or over the roller for more than 20 seconds, the TPU film may burn or deteriorate and may not adhere uniformly to both sides of the film NBR sponge, resulting in defective products.

An NBR sponge used for a cosmetic puff or a sponge is generally used after polishing or cutting, but it is preferable that a coating film is formed on both outer surfaces of the coated NBR sponge of the present invention. The coated NBR sponge of the present invention has a film formed thereon, and it is possible to attach a TPU (Thermoplastic polyurethane) film without using an adhesive. If a film is not formed on the coated NBR sponge of the present invention, a TPU (Thermoplastic polyurethane) film does not adhere to the outer surface of the coated NBR sponge, and thus a separate adhesive is used, which complicates the manufacturing process. There is a problem of stimulating the olfactory.

The TPU film preferably has a thickness of 0.01 to 0.1 mm. If the thickness of the TPU film is less than 0.01 mm, the thickness of the TPU film may be too thin to easily tear or break the pressure applied during use of the puff, thereby absorbing the cosmetic composition into the puff. If the thickness of the TPU film is more than 0.1 mm, it is not easy to attach the TPU film to the NBR sponge due to the thickening of the TPU film. Therefore, the temperature of the roller may be increased to attach the TPU film to the NBR sponge, The production efficiency is lowered and the TPU film may burn or deteriorate, and the degree of increase in the elasticity and durability of the puff is small compared with the increase in the thickness of the TPU film.

In step S50, a coating NBR (nitrile butadiene rubber) sponge with a thermoplastic polyurethane (TPU) film attached thereto is cut into a predetermined shape, and at the same time, the edge portion of the sponge is sealed and bonded at step S60. The sealing step (S60) is preferably performed by sealing at 150 to 200 DEG C under a pressure of 3 to 10 Mpa for 5 to 50 seconds.

If the sealing step (S60) is carried out at a temperature of less than 150 DEG C or a pressure of less than 3 Mpa or less than 5 seconds, sufficient temperature and pressure is not applied to the edge of the TPU film-attached NBR sponge, There is a problem that it is not adhered and sealed. If the sealing step (S60) is carried out at a temperature of more than 200 DEG C or a pressure of more than 10 Mpa or more than 50 seconds, the TPU film attached to the NBR sponge may burn or deteriorate due to the high temperature, Pressure and time are consumed and the efficiency of manufacturing is deteriorated.

In the coated NBR puff having the TPU film of the present invention, the TPU film is formed on the outer surface of the puff so that the cosmetic composition is not absorbed into the puff, so that the elasticity of the puff can be maintained for a long time. .

Further, the puff of the present invention has an effect of preventing the cosmetic composition from being absorbed into the puff, preventing excessive consumption of the cosmetic composition, and preventing skin troubles caused by the remaining cosmetic composition.

Hereinafter, examples, comparative examples and test examples of the present invention will be described in detail.

The following examples, comparative examples and test examples are merely illustrative of the present invention, and the present invention is not limited to the following examples, comparative examples and test examples.

EXAMPLES 1 TO 8. Preparation of coated NBR puffs with TPU film

According to the following Table 1, a coated NBR puff having a TPU film was prepared by varying the thickness of a film NBR (nitrile butadiene rubber) sponge and the thickness of a TPU film.

(S10): liquid NBR (dispersant), titanium dioxide, sulfur (S) as a vulcanizing agent, EZ, MZ and zinc oxide (ZnO) as a vulcanization accelerator, trimene base as a foam stabilizer, The mixture was stirred at 50 rpm and liquid paraffin was added to adjust the viscosity to 6,500 cps, and the mixture was stirred with stirring.

(S20): Sodium silicate, bentonite, and sodium alginate are added as a coagulant to the stirred material in the step (S10) and mixed. The mixture is stirred at 30 DEG C for 1 hour at 1 mm, 3 mm, 7 mm, mm < / RTI >

(S30): In the above step (S20), the foam molded product was charged into a vulcanizer and vulcanized at a temperature of 85 to 105 DEG C for 50 minutes.

(S40): In step S30, the vulcanized product was washed and dried to prepare a coated NBR (nitrile butadiene rubber) sponge having a thickness of 1 mm, 3 mm, 7 mm, 12 mm and 15 mm.

(S50): A thermoplastic polyurethane (TPU) film having a thickness of 0.01 to 0.15 mm is placed on both sides of a coated NBR (nitrile butadiene rubber) sponge in the step S40, To attach the TPU film to the NBR sponge.

(S60): In step S50, a coated NBR (nitrile butadiene rubber) sponge with a TPU film is sealed by sealing the edges by applying a pressure of 5 MPa at 180 DEG C for 15 seconds, and then a TPU film is formed The preparation of the coated NBR puff was completed.

NBR sponge thickness (mm) Thickness of TPU film (mm) Example 1 7 0.01 Example 2 7 0.03 Example 3 7 0.10 Example 4 7 0.15 Example 5 One 0.03 Example 6 3 0.03 Example 7 12 0.03 Example 8 15 0.03

Comparative Example. Preparation of General NBR Puffs [0097] Of the preparation methods of the above examples, the remaining NBR puffs were prepared by performing the remaining steps except (S50).

(S10): liquid NBR (dispersant), titanium dioxide, sulfur (S) as a vulcanizing agent, EZ, MZ and zinc oxide (ZnO) as a vulcanization accelerator, trimene base as a foam stabilizer, The mixture was stirred at 50 rpm and liquid paraffin was added to adjust the viscosity to 6,500 cps, and the mixture was stirred with stirring.

(S20): Sodium silicate, bentonite and sodium alginate are added as a coagulant to the agitated material in the step (S10), and the mixture is foamed and formed to a thickness of 7 mm at 30 DEG C for 1 hour using a foaming machine Respectively.

(S30): In the above step (S20), the foam molded product was charged into a vulcanizer and vulcanized at a temperature of 85 to 105 DEG C for 50 minutes.

(S40): In step S30, the vulcanized product was washed and dried to prepare a nitrile butadiene rubber (VBR) sponge having a thickness of 7 mm.

(S60): The NBR (nitrile butadiene rubber) sponge prepared in the above step S40 was sealed at 180 DEG C for 15 seconds under a pressure of 5 MPa to form a general NBR puff.

Test example. Puff Rating

In order to evaluate the preference of the puffs manufactured in the above Examples and Comparative Examples, 40 women in their 20s and 30s were used for 30 days, and the results were compared and evaluated. The preference of the puffs was evaluated by the elasticity, (5 points scaling method). The results were as follows: Excellent 5 points, Good 4 points, Average 3 points, Poor 2 points, and Very poor 1 point. The evaluation scores are shown in Table 2 below.

The degree of elasticity of the puff was evaluated when the skin was touched by using the puff on which the cosmetic composition was buried. The degree of puffing was evaluated by applying the composition to the puff, The durability was evaluated by visually observing that the puff was broken or the shape of the puff was deformed after 30 days of use of the puff, and the remaining amount of the cosmetic composition The cosmetic composition remaining on the puff used when applying the cosmetic composition was visually observed and evaluated as being worse the larger the residual amount.

Elasticity Brittle Adhesion durability Remaining cosmetic composition Example 1 5 5 5 4 5 Example 2 5 5 5 5 5 Example 3 5 5 4 5 5 Example 4 5 4 4 5 5 Example 5 2 One 2 2 One Example 6 5 5 5 4 5 Example 7 4 4 4 5 5 Example 8 4 3 3 5 5 Comparative Example 4 3 2 2 One

It can be seen from the results shown in Table 2 that the examples except for Example 5 are higher in preference than the Comparative Examples, and that Example 2 is the best in all the evaluation items, and Examples 1 and 3 , And 6, respectively. First, the comparison of Examples 1 to 4, in which the thickness of the TPU film is different, shows that Example 2 is the most excellent in all the evaluation items, Example 4 has lower wettability than Examples 1 to 3, And the durability of Example 1 is lower than that of Examples 2 and 3. That is, when the thickness of the TPU film is 0.15 mm or more, it is not easy for the TPU film to adhere to the outer surface of the coated NBR sponge, and the degree of improvement in wettability, adhesion, Could know. In addition, when the thickness of the TPU film was 0.01 mm or less, it was found that the TPU film film was deformed by the repetitive force.

Comparing Examples 2 and 5 to 8 in which the thickness of the NBR sponge is different, Example 2 is the most excellent in all evaluation items, Example 5 is the lowest in all the evaluation items, Example 8 is excellent in durability, Elasticity, spreadability and adhesion are low. That is, when the thickness of the NBR sponge is 1 mm or less, the thickness of the puff is reduced and the elasticity of the puff is lowered. Accordingly, when the cosmetic composition is applied to the skin using the puff, the elasticity of the puff and the applied pressure are not efficiently transmitted to the skin And it was confirmed that the cosmetic composition was absorbed into the puff during the repeated use of the puff. In addition, when the thickness of the NBR sponge is 15 mm or more, the thickness of the puff is thick and durability is excellent. However, the force applied when the puff is used is not sufficiently transmitted to one surface of the puff bonded to the skin, It was found that there was a problem that excessive force was applied to the skin in order to increase the adhesion.

Comparing Example 2 and Comparative Example in which the thickness of the NBR sponge is the same and the presence of the TPU film is compared, it can be seen that the Comparative Example is lower in all evaluation items than the Example 2. That is, the comparative example shows similar elasticity due to the same thickness of the NBR sponge of Example 2, but the outer surface of the NBR sponge is easily broken during the repeated use process, resulting in poor spreadability and adhesive force, and the cosmetic composition is absorbed into the puff .

Claims (2)

Coated NBR (nitrile butadiene rubber) sponge and
A TPU film membrane attached to the outer surface of the coated NBR (nitrile butadiene rubber) sponge,
Wherein the coated NBR (nitrile butadiene rubber) sponge has a coating on the outer surface thereof. The method according to claim 1,
Wherein the NBR (nitrile butadiene rubber) sponge has a thickness of 3 to 12 mm.

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