WO2016027935A1

WO2016027935A1 - Soft polyurethane foam for brassiere cup having air permeability, washability and delayed discoloration, and preparation method therefor

Info

Publication number: WO2016027935A1
Application number: PCT/KR2014/011352
Authority: WO
Inventors: 이석봉; 김부경
Original assignee: 주식회사 세림티티시
Priority date: 2014-08-19
Filing date: 2014-11-25
Publication date: 2016-02-25
Also published as: KR101462475B1; CN105747292A

Abstract

Disclosed are: a soft polyurethane foam for a brassiere cup having excellent delayed discoloration, air permeability and washability; and a preparation method therefor. The method comprises the steps of: preparing a polyurethane foam of a level 25-60 ppi greater than that of a normal pore size; producing the prepared foam of a size of 2-50 M, and then cutting the same into a product of a size of 2-20 mm; putting, in a sealed chamber, the cut roll obtained by the method, and carrying out reticulation through gas injection; and completing a brassiere cup pad material, by mold forming the reticulated roll obtained in said step at a temperature inside a brassiere cup mold of 180-230°C and for a molding time of 90-120 seconds.

Description

【Specification】

[Name of invention]

Soft polyurethane products for bra cups with breathability, washability, and discoloration delay and manufacturing method thereof

Technical Field

<1> The present invention relates to a soft polyurethane product for bra cups having breathability, washability and color retardation, and a method of manufacturing the same. More specifically, the smell and skin problems caused by poor sweat discharge during summer bra wearing It solves the health problems of the skin and the skin allergy caused by the large amount of detergent remaining on the bra pad after washing, and it increases the dehydration efficiency during the washing of the bra and speeds up the drying. The present invention relates to a flexible polyurethane foam for bra cups having an open cell pore structure with improved retrieval of harmful bacteria, and a method of manufacturing the same.

Background Art

<2> In general, women's bra cups have improved the volume and fit, but it is not easy to discharge sweat in the summer and the closed cell pore structure has caused a large amount of detergent residue after washing, causing skin problems.

<3> That is, the soft polyurethane product for the conventional bra cup pad material use the pore size

The closed cell pore structure of 70 ~ 90ppi level did not bring about good ventilation, and sweat was not easily discharged, resulting in bad smell and dryness. <4> In addition, the drying rate was poor, the drying speed was slow after washing, there was a problem that the bacterial growth in the indoor drying during the rainy season increases.

In this regard, Korean Patent Registration No. 10-0765822 (2007.10.04.) Discloses an attachment bra with ventilation.

[6] The prior art is an attached type bra which is used by directly attaching to a chest without using a shoulder strap and a back strap. After that, a pair of bra cups formed by pressing them; An adhesive layer formed only on a portion of an inner surface of the bra cup and directly attached to a user's skin; A plurality of ventilation holes formed for ventilation in a portion where the adhesive layer is not formed in the bra cup; A fabric surrounding the outer surface of the bra cup; It comprises a connecting means for connecting each bra cup.

<7> Also, in Japanese Unexamined Patent Publication No. 2009-179891 (bra and a bra) As previously mentioned, a bra cup manufactured to improve air permeability is a material that allows a bra to have air permeability by forming a plurality of vent holes or a regular vertical lattice (sl it). 방식) The material used in the method is manufactured only on the inner side of the molded bra cup. Therefore, the fabric is attached to the surface of the actual bra cup surface. The inflow of the air layer in contact with the human body has a relatively reduced effect in comparison with the soft polyurethane product, which is a base layer made through the film forming treatment (ret iculat ion) described in the present invention. Therefore, the present invention improves breathability and at the same time improves dryness during washing as well as reducing the amount of residual detergent to remove harmful elements to the human body. It also has the effect of delaying the yellowing caused by long-term use.

<8> On the other hand as a right soft urethane embraces the closed cell structure of a conventional bra cup pad material use, as shown in 4 ^'is formed mothada sense for the discharge of perspiration and stuffiness during wearing.

In addition, the conventional bra cup has a problem of poor breathability is not discharge of sweat, low drying composition after washing.

Therefore, women's bra cups with a closed pore structure have a good volume and elasticity, but there is a problem such as odor and skin troubles due to difficulty in sweat discharge in summer. It has also been a hotbed of the same harmful bacteria. In addition, the detergent did not penetrate deeply into the cup, so there was a deterioration in washability and a bad rinse after washing.

<1 1> [prior art literature]

<) 2> [Patent Documents]

<13> (Patent Document 1) Republic of Korea Patent Registration No. 10-0765822 Attachable bra with ventilation.

(Patent Document 2) Japanese Patent Registration Publication No. 2009-179891 bra material and bra.

[Detailed Description of the Invention]

[Technical problem]

An object of the present invention is a soft polyurethane product designed to improve air permeability and dryness as well as discoloration with an open cell (cel l) pore structure through ret culat ion. Polyurethane foam of 2 ~ 50M size was cut to 2 ~ 20mm size and wound into Rol l and placed in a closed chamber to have a process of artificially removing the cell (cel l) film. <16>

<i7> By using a soft polyurethane product having an open cell (cel l) pore structure of the present invention, it was not only easy to discharge sweat when used for bra cup pad material, but also suppressed odor generation. In addition, the effect of drying after washing and reduction of residual detergent content can be expected, as well as the discoloration delay even during long-term use.

Technical Solution

<18> An object of the present invention, the soft PU products for women's bra cups with low detergent residue and excellent breathability and color retardation delay is 25 ~ 35kg / m ³ , pore size 25 ~ 60ppi, Breathability is 3.00-10.00 ft ³ / min and color retardation is WKASTM E 313-

96) The level is 100 ~ 150, and YKASTM E 313-96) has the level of 0 ~ -50.

The implementation of the soft polyurethane for the purpose of the present invention described above is to rotate the polyol and isocyanate and the catalyst, foaming agent, additives and water at a liquid temperature of about 20 ° C through a metering pump in a predetermined amount of 500 ~ 6,000 rpm step of the foam to expand the pore size through the conventional injection pressure of 0.5 ~ 1.0kgf / cm ² higher than 1.5kgf / cm ² or more spray pressure transferred to the mixing head of the high pressure; The transferred raw material is discharged to the upper part of the conveyor moving at a constant speed of 2.5 ~ 6.5m / min, cut into short blocks or long blocks and subjected to hardening aging. Two steps to produce a urethane foam; After the foam is produced in 2-50M standard, it is cut into products of 2 ~ 20 隱 standard and put into a closed chamber with a polyurethane or PU product in the form of a sheet or in order to have an open cell pore structure. Step 3 to inject the hydrogen and nitrogen oxygen gas into the chamber for 28 to 38 minutes by mixing the vacuum degree inside the pressure gauge reference state 810 ~ 850 Pa bar; And attaching the film-treated soft urethane product to the fabric to complete the bra cup pad material through a working process of forming temperature of 180-230 ^° C. and forming time of 90-120 sec. It achieves by the manufacturing method of the soft polyurethane goods for bra cup use which manufactures in order.

Advantageous Effects

According to the present invention, soft PU products for women's bra cups having low detergent residue and excellent breathability and color retardation are 25 to 60 ppi coarse than normal pore sizes and 25 to 35 kg / m ^{3 of} gag density. And the air permeability is 3.00 ~ 10.00 ft ³ / min, and the discoloration delay is 100 ~ 150 based on WKASTM E 313-96) and YKASTM E 313-96) has 0 ~ -50. <21>. In particular, the soft PU product having the open cell pore structure shown in the present invention has excellent relative breathability as compared to the soft PU foam for bra use formed with the closed cell pore structure of the prior art, so that sweat drying is good, thus preventing odors and skin problems. The effect was possible. In addition, it can feel refreshing compared to the previous product, and not only improves the feeling of wearing, but also the residual detergent amount for the surfactant (LAS) component after washing is up to 20mg / kg or less, which is at least 15-20% lower than that of the previous product. The amount of detergent remaining in the system was confirmed.

<22> In addition, the air permeability is easy to minimize the drying time compared to conventional products

It can be confirmed that it is about 20-40% faster, and it also has the advantage of preventing odor and skin trouble caused by bacteria or bears, which are caused by poor drying during the rainy season.

<23> In order to solve the problem of discoloration (yel lowing) easily in the long-term use, the composition of HALS Hindered Amine Light Stabilizer and Phosphite I Thioester-type different from those used in the conventional mold bra or memory bra Discoloration delay effect could be expected.

[Brief Description of Drawings]

1 is a flowchart illustrating a manufacturing process of a flexible polyurethane article for bra cup use according to the present invention;

Figure 2 is a substitute picture showing the structure of the soft polyurethane article for bra cup use according to the present invention,

3 is a cross-sectional view of the bra cup to which the flexible polyurethane product for bra cup use according to the present invention is applied,

FIG. 4 is a drawing substitute photograph showing the structure of a polyurethane product for a conventional bra cup. FIG.

<28> [Explanation of symbols]

<29> 1 ： Outer fabric 2 ： Lining fabric

<30> 3 ： Polyurethane product 4 ： Inner fabric

[Best form for implementation of the invention]

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Embodiments to be described below are intended to be described in detail so that those skilled in the art can easily carry out the invention, This does not mean that the technical spirit and scope of the present invention is limited.

<33>

Figure 1 is a flow chart showing the manufacturing process of the flexible polyurethane article for bra cup use according to the present invention, Figure 2 is a substitute picture showing the organization of the flexible polyurethane article for bra cup use according to the present invention, Figure 3 is A cross-sectional view of a bra cup to which a soft polyurethane product for bra cup use according to the present invention is applied.

<35>

As shown in FIGS. 1 to 3,

<37>

<38> [Step 1 (31)]

The liquid is transferred to a high pressure mixing head rotating at 500-6,000 rpm through a metering pump in a predetermined amount of poly and isocyanate, and catalyst, foaming agent, additive and water in rc. by using an injection pressure of 0.5 ~ 1.0kgf / cm ² than on the high 1.5kgf / cm ² injection pressure, expand the pore size is the pore size of the foam level 25-60ppi polyurethane foam.

<40>

<4i> [Step 2 (S2)]

<42> The raw material thus transferred is discharged to the upper part of the conveyor moving at a constant speed

(Short block) or long block (long block) to cut through hardening aging.

<43>

[44] [Step 3 (S3)]

<45> After the foam produced in the 2 ~ 50M standard cut to 2 ~ 20 匪 standard product.

<46> Polyurethane wound with sheet black silver to give open cell pore structure

(PU) The product is placed in a closed chamber.

The degree of vacuum inside the chamber is set at a pressure gauge of 810 to 850 mmbar, and hydrogen and nitrogen oxygen gas is injected into the chamber for 28 to 38 minutes, thereby allowing the mixture to be thoroughly mixed.

<48> This mixed gas causes a flame explosion with ignition combustion within 2 seconds and releases heat in a closed chamber to the outside in a total of 3 times within 15 seconds to completely break the sal wall of the soft urethane product. You are done.

<49>

<50> [Step 4 (S4)] <5i> The soft urethane foam treated with the film is attached to the fabric, and the bra cup pad material is completed through a working process with a molding temperature of 180 to 230 ^° C and a molding time of 90 to 120 sec.

<52>

<53> The main raw material of the flexible polyurethane product having such a structure is that the average molecular weight

It consists of a high molecular weight poly and a isocyanate with an NC0 content of 40% or more.

For the normal behavior of these constituent compounds, a catalyst, foam stabilizer, additives, water and the like are combined to complete the material.

Hereinafter, embodiments of the present invention will be described.

<56>

EXAMPLES

<58>

<59> Comparative test example of the soft polyurethane products for use in the conventional mold bra cup and the present invention.

<60> [Table 1]

<61> Gait density ： 26kg / m ³ , Pore size ： 60ppi

<64> [Table 2] <66> Hanger density ： 32kg / m ， Pore size ： 35ppi

<67>

<69> [Table 3]

<71> Appearance Density ： 35kg / m ， Pore Size ： 25ppi

<72>

<74> Comparative test example of the soft polyurethane product for the conventional mold bra cup use and the dryness of the present invention.

<75> [Table 4]

<77>

<78> Soft polyurethane foam for conventional mold bra cup use and residual detergent content of the present invention

<79> [Table 5] Comparative test example.

Density: 32kg / m ， Pore size: 35ppi standard-Comparative example of soft polyurethane foam for mold bra cup use compared with the present invention.

<86> [Table 6]

2 and 3, the bra cup is completed by applying a soft polyurethane product for bra cup use according to the present invention.

That is, the lining fabric (2) attached to the inner and outer surfaces of the flexible polyurethane article (3) for bra cup use according to the present invention, the latch fabric (1) attached to the outer surface of the lining fabric (2), It consists of a lining fabric (4) attached to the inner surface of the lining fabric (2).

The bra cup according to this configuration can be significantly improved breathability than the conventional, there is a side that facilitates drying after washing as well as the discharge of sweat through ensuring a good breathable portion.

The soft polyurethane product (3) for bra cup use according to the present invention has a level of 25 to 60 ppi coarse than a normal pore size, a walking density of 25 to 35 kg / m ³ , and a breathability of 3.00 to ³ .

It is composed of 10.00 ftVmin, discoloration delay is 100 ~ 150 level based on WKASTM E 313-96), and YKASTM E 313-96) is 0 ~ -50 level.

Claims

[Range of request]

[Claim 1]

Breathable 3.0CKL0.00 ft ³ / min, pore size 25 ~ 60ppi, walk density

25 ~ 35kg / m ³ , color retardation is 100 ~ 150 based on WKASTM E 313-96), YKASTM E 313-96) is 0-50, and has breathability, washability and color retardation. Is a soft polyurethane product for bra cups.

[Claim 2]

Polyol and isocyanate, and the first step of foaming the catalyst, foaming agent, additives and water to a high pressure mixing head rotated at 500 ~ 6,000rpm through a metering pump in a predetermined amount;

2 steps to produce a polyurethane foam having a pore size of 25 ~ 60ppi through the curing aging by discharging the transferred raw material to the upper part of the conveyor moving at a constant speed;

The cut polyurethane product is cut into a closed chamber in order to cut the manufactured polyurethane product, and the cut polyurethane foam has an open sal pore structure, and hydrogen, nitrogen, and oxygen gas are introduced into the chamber from 28 to 38. 3 steps of mixing by injecting for a minute, and processing the film through flame explosion and heat release in the chamber;

Attaching the film-processed polyurethane product to a fabric and finishing the bra cup pad material through a forming process for 90 to: L20sec at a temperature of 180 to 230 ^° C .;

Method for producing a soft polyurethane article for a bra cup having a breathable and washable and discoloration delay characterized in that it comprises a.

[Claim 3]

The method of claim 2,

The flame explosion causes the explosion in the ignition combustion when the pressure in the chamber is 810 ~ 850mmbar,

The heat dissipation is a method of manufacturing a soft polyurethane product for a bra cup having a breathability, washability and discoloration delay characterized in that it is released to the outside by three processes.