KR0156729B1 - Polyurethane mat material - Google Patents
Polyurethane mat material Download PDFInfo
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- KR0156729B1 KR0156729B1 KR1019950008242A KR19950008242A KR0156729B1 KR 0156729 B1 KR0156729 B1 KR 0156729B1 KR 1019950008242 A KR1019950008242 A KR 1019950008242A KR 19950008242 A KR19950008242 A KR 19950008242A KR 0156729 B1 KR0156729 B1 KR 0156729B1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/125—Water, e.g. hydrated salts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/22—Compounds containing nitrogen bound to another nitrogen atom
- C08K5/23—Azo-compounds
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- Polyurethanes Or Polyureas (AREA)
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Abstract
본 발명은 폴리우레탄 발포 매트재에 관한 발명이며, 특히 폴리우레탄 발포재의 탄성회복 속도를 완속화하고 감촉, 냄새, 내유성, 내광성, 변색방지 특성을 개선함을 특징으로 하는 것으로, 폴리올 (OH Value 250-270) 100 중량부, 물 1-3 중량부, 1,4-디아자(2.2.2)바이사이클옥탄 0.5-1.5 중량부, 계면활성제(Surfactant) 1-2 중량부, 이소시아네이트(Isocyanate) 60-40 중량부를 발포시켜서 되는 폴리우레탄 완속회복 매트재, 또는 폴리올 100중량부에 대하여 안료 50-100중량부, 변색방지제 2-5 중량부를 첨가하여 내 변색 및 내 탈색 특성을 가지게 한 것을 특징으로 하는 폴리우레탄 완속회복 매트재, 또는 우레탄 Prepolymer 100 중량부, 안료 50-200중량부, 변색방지제 2-5 중량부, 희석제 100-200 중량부로 되는 코팅제를 코팅한 금형내에 완속회복 매트재 조성물을 발포 가교시켜 코팅제가 발포체 외면에 전착되게 한 것을 특징으로 하는 내수특성을 향상시킨 폴리우레탄 완속회복 발포체 매트재임.The present invention relates to a polyurethane foam mat material, and in particular, to slow down the elastic recovery speed of the polyurethane foam and improve the feel, smell, oil resistance, light resistance, and discoloration resistance, and polyol (OH Value 250 -270) 100 parts by weight, water 1-3 parts by weight, 1,4-diaza (2.2.2) bicycleoctane 0.5-1.5 parts by weight, surfactant 1-2 parts by weight, isocyanate 60 Polyurethane slow recovery mat material by foaming -40 parts by weight, or 50-100 parts by weight of pigment and 2-5 parts by weight of anti-discoloration agent with respect to 100 parts by weight of polyol to have discoloration and decolorization resistance Polyurethane slow recovery mat material or foam crosslinking the slow recovery mat material composition in a mold coated with a coating agent consisting of 100 parts by weight of urethane prepolymer, 50-200 parts by weight of pigment, 2-5 parts by weight of anti-discoloration agent, and 100-200 parts by weight of diluent. Letting the coating The slow recovery polyurethane foam mat tenure with improved domestic properties, characterized in that the foamed material to be deposited on the outer surface.
Description
본 발명은 폴리우레탄 발포 매트재에 관한 발명이며, 특히 폴리우레탄 발포재의 탄성회복 속도를 완속화하고 감촉, 냄새, 내유성, 내광성, 변색방지 특성을 개선함을 특징으로 하는 것이다.The present invention relates to a polyurethane foam mat material, and is characterized in that the elastic recovery speed of the polyurethane foam material is slowed down and the feel, smell, oil resistance, light resistance, and discoloration prevention properties are improved.
키친매트 혹은 주택이나 차량의 실내용 매트의 제품 구현에 있어서 요구되는 발포재의 물성은 포근하고 부드러운 감촉이 조성하는 안락감(Touch feeling, 감촉)이다. 일반적으로 탄성체의 유연한 탄성강도는 푹신한 감촉을 발생 시키지만 좀더 구체화된 안락감은 탄성체의 여유있는 또는 회복작용과 부드러운 탄성강도에 의하여 얻어진다.The physical properties of the foam material required for the realization of the kitchen mat or the mat for the interior of a house or a vehicle are touch feelings created by a soft and soft texture. In general, the flexible elastic strength of the elastic body produces a soft feel, but more detailed comfort is obtained by the relaxed or restoring action of the elastic body and the soft elastic strength.
종래의 실내용 매트는 PVC(Polyvinyl chloride) 혹은 고무 (Rubber)로 존재 하였다. PVC나 고무는 소재의 반발탄성(∑ = ∫- ten δ)강도가 높아서 이러한 재료들을 발포시켜 부드러운 탄성을 갖게 할 수는 있으나 실내용 매트로서 안락감(touch feeling)을 얻기 부족한 것이었다.Conventional indoor mats existed in PVC (Polyvinyl chloride) or rubber (Rubber). PVC and rubber have high rebound elasticity (∑ = ∫-ten δ) of the material, so that these materials can be foamed to give a soft elasticity, but it is not enough to obtain a touch feeling as an indoor mat.
또 다른 문제점을 보면 PVC 매트는 고유한 냄새(할로겐(Halogen)화합물(예컨대 Cl2등)로 인한 불쾌감이 있고, 고무역시 배합물의 특수한 냄새(Olefin, Wax, Surfur) 및 발포제(Nitroso 화합물, Amine)의 발포 분해 생성물, 잔사의 영향으로 강력한 악취가 발생하므로 가정용(실내용)매트재로는 사용이 불가능한 실정이다.Another problem is that PVC mats have an unpleasant odor due to inherent odors (such as halogenated compounds such as Cl 2 ), rubber and also special odors (Olefin, Wax, Surfur) and blowing agents (Nitroso compound, Amine) Due to the strong decomposition of foamed products and residues, strong odors are generated, which makes it impossible to use them for domestic (indoor) mat materials.
본 발명은 상기의 문제점에 착안하여 폴리우레탄 매트를 가정용 (실내용) 및 산업용으로 활용할수 있도록한 완속회복 매트재를 제공함에 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the above problems to provide a slow recovery mat material capable of utilizing a polyurethane mat for home use (indoor) and industrial use.
본 발명의 다른 목적은 변색방지 특성을 가지는 완속회복 폴리우레탄 매트재를 제공함에 있다.Another object of the present invention to provide a slow recovery polyurethane mat material having a discoloration prevention property.
본 발명의 또다른 목적은 내수특성을 가지는 폴리우레탄 완속회복 매트재를 제공함에 있다.Another object of the present invention to provide a polyurethane slow recovery mat material having a water resistance.
폴리우레탄은 아래 식과같이 무냄새 메카니즘을 포함한다.Polyurethanes contain an odorless mechanism as shown below.
즉, 위 반응식과 같이 폴리우레탄은 무독, 무취한 탄산가스밖에 발생치 않으므로 냄새가 나지 않는다. 그러나 폴리우레탄 발포체는 물성이 실내용 매트재로서 적합치 못한 것이다. 따라서 폴리우레탄계 발포체를 실내용 매트재로 활용하기 위해서 발포체의 탄성회복 속도를 완속화하고 감촉, 냄새, 내유성, 내광성, 변색방지 특성을 개선함이 요구된다.That is, as shown in the above reaction formula, polyurethane does not smell because only toxic and odorless carbon dioxide is generated. However, polyurethane foams have poor physical properties as indoor mat materials. Therefore, in order to utilize the polyurethane-based foam as an indoor mat material, it is required to slow down the elastic recovery speed of the foam and to improve the feel, smell, oil resistance, light resistance, and discoloration prevention properties.
구체적으로 폴리우레탄 발포체(Foam)의 고유 특성은 충분히 살려서 내유성, 내후성과 매트로서의 기능적 측면인 반발탄성을 줄이고 독립기포(Close Cell)와 연속기포(Open cell)를 적절히 배열하여 공명파쇄기능에 의한 진동이 흡수 기능을 향상시키므로서 매트를 밟을때 느낄수 있는 기분(감촉:Touch feeling)을 최대한 보완 하였다.Specifically, the inherent characteristics of polyurethane foam are sufficiently utilized to reduce oil repellency, weatherability and rebound elasticity, which is a functional aspect as a mat, and vibration by resonance fracturing function by properly arranging closed cells and open cells. By improving the absorption function, the touch feeling is felt as much as possible when stepping on the mat.
폴리우레탄의 변색 및 탈색 취약성을 보완하기 위해 폴리우레탄의 폴리올배합물(Polyol mixture)에 변색방지용 토너(Color혼합물)를 넣어 변색 및 탈색의 표면노출을 근복적으로 방지 하였다.In order to supplement the discoloration and discoloration vulnerability of the polyurethane, a color preventing toner (Color mixture) was added to the polyol mixture of polyurethane to prevent the surface exposure of discoloration and discoloration.
본 발명에 적용한 변색방지용 폴리올 배합물의 조성은 다음과 아래와 같다.The composition of the anti-discoloration polyol formulation applied to the present invention is as follows.
폴리올 100 중량부100 parts by weight of polyol
안료 50-100 중량부50-100 parts by weight of pigment
변색방지제 2 - 5 중량부Discoloration inhibitor 2-5 parts by weight
위 조성에서 안료는 유기제 안료, 변색방지제는 자외선 흡수제 및 노화방지제 이다.In the above composition, the pigment is an organic pigment, the discoloration agent is a UV absorber and an anti-aging agent.
또한 연속기포를 포함하는 본 발명 매트재는 내수성 및 변색방지제를 위하여 매트의 표면에 금형내(In Mould)코팅을 함으로써 물의 침투 및 변색을 확실히 방지 하였다.In addition, the mat material of the present invention including a continuous bubble to prevent water penetration and discoloration by coating the mold (In Mold) on the surface of the mat for water resistance and discoloration inhibitor.
이 코팅액은 아래와 같다.This coating solution is as follows.
우레탄 Prepolymer 100 중량부Urethane Prepolymer 100 parts by weight
안료 50-200 중량부50-200 parts by weight of pigment
변색방지제 2-5 중량부Discoloration inhibitor 2-5 parts by weight
희석제 100-200 중량부100-200 parts by weight of diluent
위 코팅액 조성에서 안료는 유기안료, 변색방지제는 자외선흡수제 및 노화방지제, 희석제는 케톤계 용매(MEK, MIBK, Metylcellosolve)이다.In the coating composition, the pigment is an organic pigment, a discoloration inhibitor, an ultraviolet absorber and an anti-aging agent, and a diluent is a ketone solvent (MEK, MIBK, Metylcellosolve).
이 코팅액을 Barrier coat라 하며, 코팅액의 주성분이 매트의 주성분과 동일한 우레탄이므로 강한 접착성과 미려한 표면을 준다.This coating solution is called Barrier coat. Since the main ingredient of the coating solution is the same urethane as the main ingredient of the mat, it gives strong adhesion and beautiful surface.
본 발명에 포함되는 실내용 폴리우레탄 매트재의 일반 반응식은 아래와 같다.General reaction formula of the indoor polyurethane mat material included in the present invention is as follows.
.이소시아네이트 ; MDI, TDIIsocyanate; MDI, TDI
.폴리올 ; 폴리에테르 폴리올 OH Value 250-270Polyols; Polyether Polyols OH Value 250-270
.R ; 방향족.R; Aromatic
.R' ; 알킬 CH2, (CH2)4, (CH2)6, (CH2)2O(CH2)8,.R '; Alkyl CH 2 , (CH 2 ) 4 , (CH 2 ) 6 , (CH 2 ) 2 O (CH 2 ) 8 ,
MDI : Diphenyl methane 4,4 diisocyanateMDI: Diphenyl methane 4,4 diisocyanate
TDI : Toluene diiscyenate (2,4. 2,6. 이성체)TDI: Toluene diiscyenate (2,4.2,6.isomer)
본 발명은 다음 설명에 의하여 더욱 구체화 하였다.The invention is further embodied by the following description.
즉, 금형내에In other words, in the mold
폴리올 (OH Value 250-270) 100 중량부100 parts by weight of polyol (OH Value 250-270)
물 (H2O) 1-3 중량부1-3 parts by weight of water (H 2 O)
Debco 33LV(1.4-Diaza(2.2.2)Bicyclooctane)Debco 33LV (1.4-Diaza (2.2.2) Bicyclooctane)
(1.4-디아자(2.2.2)바이사이클로옥탄 0.5-1.5 중량부(1.4-diaza (2.2.2) bicyclooctane 0.5-1.5 parts by weight
계면활성제 (Surfactant)Surfactant
(폴리실록산폴리알킬렌블록코폴리머) 1-2 중량부(Polysiloxane Polyalkylene Block Copolymer) 1-2 parts by weight
이소시아네이트(Isocyanate) 60-40 중량부60-40 parts by weight of isocyanate
를 배합하여 발포기를 이용하여 금형에 토출시켜 40-60℃의 온도로 가교시켜 코팅제가 외면에 전착된 폴리우레탄 완속회복 매트재를 얻는 것이다.The mixture is discharged to a mold using a foamer and crosslinked at a temperature of 40-60 ° C. to obtain a polyurethane slow recovery mat material in which a coating agent is electrodeposited on the outer surface.
상기 촉매 1.4-디아자(2.2.2)바이사이클로옥탄의 구조식은 아래와 같다.The structural formula of the catalyst 1.4-diaza (2.2.2) bicyclooctane is as follows.
위 구조식을 가진 폴리우레탄 촉매의 화학반응 속도는 원 재료의 화학구조나 반응계의 온도와 촉매에 의하여 영향을 받는다. 이소시아네이트의 중합반응이나 이소시아네이트(MDI, TDI)와 활성수소 화합물(Polyol)과의 반응에 이용되는 촉매는 그 Type이나 반응속도, 반응혼합물의 유동, Foam 등 생성물의 표면층, 코어의 형성에 관여하는 프로세스성 및 얻어지는 생성물의 물성에 영향을 준다. 제3급 아민(위 구조식의것)은 일반적으로 염기도가 높을수록 또 아민질소의 전자대에 대한 입체장애가 없을수록 촉매기능을 크게된다. 위 구조식의 촉매는 3급아민 중 활성화도(pKa:5.4)가 가장 높으며 반응성이 늦으므로 매트의 완속회복조절을 쉽게 할 수 있다. 이와같이 이 발명은 이소시아네이트와 폴리올의 인덱스 조절로 1차반응성을 조절하고 3급 아민인 1.4-Diaza(2.2.2)Bicyclooctane을 사용하여 2차 반응성의 조절기능을 부여하므로 완속회복기능을 얻게하는 것이다.The chemical reaction rate of the polyurethane catalyst having the above structure is influenced by the chemical structure of the raw material or the temperature of the reaction system and the catalyst. Catalysts used for polymerization of isocyanates or reactions of isocyanates (MDI, TDI) and active hydrogen compounds (Polyol) are involved in the type, reaction rate, reaction mixture flow, surface layer of products such as foam, and the formation of cores. Affects the properties and the physical properties of the product obtained. Tertiary amines (of the above structural formula) generally have a higher basicity and greater amine nitrogen no steric hindrance to the electron band, resulting in greater catalytic function. The catalyst of the above structural formula has the highest activation degree (pKa: 5.4) among the tertiary amines, and it is easy to control the slow recovery of the mat because of its low reactivity. As such, the present invention controls the primary reactivity by controlling the index of isocyanate and polyol, and obtains a slow recovery function by giving a secondary reactivity control function using 1.4-Diaza (2.2.2) Bicyclooctane, a tertiary amine.
위 배합표에 따라 본 발명 시트재를 배합하였을때 유화시간(Cream Time)은 10-15초, 발포시간(Rise Time)는 100-130초 이다.When the present invention is formulated sheet material according to the above table, the emulsion time (Cream Time) is 10-15 seconds, the foaming time (Rise Time) is 100-130 seconds.
상기 매트재의 조성물에 변색방지 특성을 부여하기 위하여 폴리올(OH Value 250-270) 100 중량부에 대하여To 100 parts by weight of polyol (OH Value 250-270) in order to impart discoloration prevention properties to the composition of the mat material
안료 50-100 중량부50-100 parts by weight of pigment
변색방지제 2-5 중량부Discoloration inhibitor 2-5 parts by weight
를 첨가 한다.Add.
또한 본 발명은 매트재의 내수성을 부여하기 위하여 금형에In addition, the present invention provides a mold to give the water resistance of the mat material
우레탄 Prepolymer 100 중량부Urethane Prepolymer 100 parts by weight
안료 50-200 중량부50-200 parts by weight of pigment
변색방지제 2-5 중량부Discoloration inhibitor 2-5 parts by weight
희석제 100-200 중량부100-200 parts by weight of diluent
로 되는 코팅제를 조성하여 0.1㎜ 두께로 도포하고 매트재를 발포 성형시켜 코팅재가 시트재 외면에 전착되게 하여 내수특성을 부여하고 표면을 매끄럽게 변색방지, 자외선흡수, 노화방지 특성을 갖게 하는 것이다.It is to form a coating agent to be coated with a thickness of 0.1mm and to foam molding the mat material to be electrodeposited on the outer surface of the sheet material to impart a water-resistant characteristics and to smooth the surface to have discoloration prevention, ultraviolet absorption, anti-aging characteristics.
이와같이 얻어진 본 발명 매트재는 표면에 폴리우레탄계의 치밀한 코팅층이 금형으로 부터 전착되어 탁월한 내수성 특성을 지니게 되며, 시트재에 유기체 안료가 포함되어 필요한 색상을 나타냄은 물론 변색방지, 자외선 흡수, 노화방지 등의 특성을 가지게 되는 것이다.Thus obtained matte material of the present invention is a polyurethane-based dense coating layer is electrodeposited from the mold to have excellent water resistance properties, the organic material is included in the sheet material exhibits the required color, as well as discoloration prevention, UV absorption, anti-aging, etc. It will have characteristics.
본 발명의 실시예 배합표에 따른 매트재의 탄성 회복특성에 관련한 물성은 다음과 같다.Physical properties related to the elastic recovery characteristics of the mat member according to the embodiment of the present invention is as follows.
[실시예 1]Example 1
폴리올 (OH Value 250-270) 100 중량부100 parts by weight of polyol (OH Value 250-270)
물 1 중량부1 part by weight of water
Debco 33LV 1 중량부Debco 33LV 1 part by weight
계면활성제 1 중량부1 part by weight of surfactant
MDI 50 중량부MDI 50 parts by weight
본 실시예에서 얻어진 매트재의 물성은 다음과 같다.The physical properties of the mat member obtained in this example are as follows.
IFD 25% Deflection 17 ASTM D3574 TEST B1법IFD 25% Deflection 17 ASTM D3574 TEST B 1 Method
Ball rebound 5 ASTM D3574Ball rebound 5 ASTM D3574
인장강도 (㎏/㎠) 1.6 ASTM D3574Tensile Strength (㎏ / ㎠) 1.6 ASTM D3574
신장율(%) 1.50 ASTM D3574Elongation (%) 1.50 ASTM D3574
인열강도(㎏/㎝) 1 ASTM D3574Tear Strength (㎏ / ㎝) 1 ASTM D3574
압축영구수축율(%) 2.5 ASTM D3574 TEST D법Compressive permanent shrinkage (%) 2.5 ASTM D3574 TEST D Method
회복시간 (Recovery Time) (초)Recovery Time (sec)
두께 10 ㎝ 10 자사시험방법Thickness 10 ㎝ 10 In-house test method
두께 20 ㎝ 20 자사시험방법Thickness 20 ㎝ 20 In-house test method
[실시예 2]Example 2
폴리올 (OH Value 250-270) 100 중량부100 parts by weight of polyol (OH Value 250-270)
물 1.5 중량부1.5 parts by weight of water
Debco 33LV 1.2 중량부Debco 33LV 1.2 parts by weight
계면활성제 1 중량부1 part by weight of surfactant
MDI 55 중량부MDI 55 parts by weight
본 발명예에서 얻어진 매트재의 물성은 다음과 같다.The physical properties of the mat member obtained in the example of the present invention are as follows.
IFD 25% Deflection 20 ASTM D3574 TEST B1법IFD 25% Deflection 20 ASTM D3574 TEST B 1 Method
Ball rebound 4 ASTM D3574Ball rebound 4 ASTM D3574
인장강도 (㎏/㎠) 1.4 ASTM D3574Tensile Strength (㎏ / ㎠) 1.4 ASTM D3574
신장율(%) 160 ASTM D3574Elongation (%) 160 ASTM D3574
인열강도(㎏/㎝) 1 ASTM D3574Tear Strength (㎏ / ㎝) 1 ASTM D3574
압축영구수축율(%) 4 ASTM D3574 TEST D법Compressive permanent shrinkage (%) 4 ASTM D3574 TEST D Method
회복시간 (Recovery Time) (초)Recovery Time (sec)
두께 10 ㎝ 12 자사시험방법Thickness 10 ㎝ 12 In-house test method
두께 20 ㎝ 25 자사시험방법Thickness 20 ㎝ 25 In-house test method
상기 실시예 1,2의 배합표의 이소시아네이트의 인덱스를 조절(증감)함으로써 본 발명 매트재의 안락감의 요소인 회복변형시간을 조절할수 있다.By adjusting (increasing or decreasing) the index of the isocyanate in the compounding table of Examples 1 and 2, the recovery strain time, which is an element of the comfort of the mat member of the present invention, can be adjusted.
또한 본 발명 매트재의 IFD 는 물 및 Freon의 조절(증감)에 의해 높게 혹은 낮게 할수 있다.In addition, the IFD of the mat member of the present invention can be made high or low by controlling (increasing or decreasing) water and Freon.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950008242A KR0156729B1 (en) | 1995-04-10 | 1995-04-10 | Polyurethane mat material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950008242A KR0156729B1 (en) | 1995-04-10 | 1995-04-10 | Polyurethane mat material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960037714A KR960037714A (en) | 1996-11-19 |
| KR0156729B1 true KR0156729B1 (en) | 1998-12-01 |
Family
ID=19411819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950008242A KR0156729B1 (en) | 1995-04-10 | 1995-04-10 | Polyurethane mat material |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0156729B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836581B1 (en) * | 2007-03-29 | 2008-06-10 | (주)생활낙원 | The impact relief member manufactured by the polyurethane foam and their manufacturing method |
| KR102552819B1 (en) * | 2022-01-06 | 2023-07-10 | 주식회사 국가대표 | Flooring for Noise Prevention between Floors |
-
1995
- 1995-04-10 KR KR1019950008242A patent/KR0156729B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836581B1 (en) * | 2007-03-29 | 2008-06-10 | (주)생활낙원 | The impact relief member manufactured by the polyurethane foam and their manufacturing method |
| KR102552819B1 (en) * | 2022-01-06 | 2023-07-10 | 주식회사 국가대표 | Flooring for Noise Prevention between Floors |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960037714A (en) | 1996-11-19 |
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