KR20010108706A - Method for preparing polyurethane foam molding having multidensities - Google Patents

Method for preparing polyurethane foam molding having multidensities Download PDF

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Publication number
KR20010108706A
KR20010108706A KR1020000029448A KR20000029448A KR20010108706A KR 20010108706 A KR20010108706 A KR 20010108706A KR 1020000029448 A KR1020000029448 A KR 1020000029448A KR 20000029448 A KR20000029448 A KR 20000029448A KR 20010108706 A KR20010108706 A KR 20010108706A
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South Korea
Prior art keywords
polyurethane foam
midsole
molded article
shoe
multidensities
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KR1020000029448A
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Korean (ko)
Inventor
이재갑
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배이순
(주) 지지테크-텍스
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Priority to KR1020000029448A priority Critical patent/KR20010108706A/en
Publication of KR20010108706A publication Critical patent/KR20010108706A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D19/00—Gloves
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B17/00—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined
    • A43B17/14—Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined made of sponge, rubber, or plastic materials
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/16—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats of legless type, e.g. with seat directly resting on the floor; Hassocks; Pouffes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/122—Soles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • B29D35/14—Multilayered parts
    • B29D35/144—Heels
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Textile Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)

Abstract

본 발명은 경제적이면서도 간편한 방법으로 다중 밀도를 갖는 폴리우레탄 폼 성형체를 제조하는 방법에 관한 것으로, 성형체의 성형시, 소정의 부위에 부직포를 부가하는 것을 특징으로 한다.The present invention relates to a method for producing a polyurethane foam molded article having a multi-density in an economical and convenient manner, characterized in that the non-woven fabric is added to a predetermined portion during the molding of the molded article.

Description

다중밀도를 갖는 폴리우레탄 폼 성형체의 제조방법{Method for preparing polyurethane foam molding having multidensities}Method for preparing polyurethane foam molded article having multi-density {Method for preparing polyurethane foam molding having multidensities}

본 발명은 다중 밀도를 갖는 폴리우레탄 폼 성형체의 제조방법에 관한 것이다.The present invention relates to a method for producing a polyurethane foam molded article having multiple densities.

폴리우레탄 폼은 다포성 또는 스폰지형의 폴리우레탄 수지로 폴리에스테르 또는 폴리에테르계 폴리올과 2관능 또는 다관능의 디이소시아네이트와 발포제, 촉매 등의 원료 및 각종 첨가제를 혼합반응시키면 중부가 가교반응이 일어나고, 발열하여 수지화된 것으로, 반응의 진행중에 발생하는 이산화탄소 때문에 발포 다공질이 되며, 기계적 강도도 크고, 내열성, 내용제성, 내노화성, 접착성이 양호하며,원료조건을 택하는 것에 의해 상당히 연질탄력성이 있는 것에서 경질 내마모성의 것까지 제조되고 그 경도에 의해 연질, 반경질, 경질의 3종류로 나누어진다. 연질 폼은 자동차 등의 쿠션재, 충진재, 필터용 등으로 사용되고 있고, 반경질 폼은 열이나 전기의 절연재료로, 경질 폼은 가볍고, 탄성이 적으며, 하중부담능력이 크고 단열성도 우수하여 항공기 및 기계부품재료, 공업용 및 가정용 단열재료와 방음판 등으로 널리 이용되고 있다.Polyurethane foam is a polyporous or sponge-type polyurethane resin. When poly- or polyether-based polyols are mixed with bifunctional or polyfunctional diisocyanates, raw materials such as blowing agents, catalysts, and various additives, a polyaddition crosslinking reaction occurs. It is made of exothermic resin which is exothermic and foamed porous due to carbon dioxide generated during the reaction. It has high mechanical strength, good heat resistance, solvent resistance, aging resistance and adhesiveness, and it is considerably soft elasticity by choosing raw material conditions. To hard wear resistant and are divided into three types: soft, semi-hard, and hard. Soft foam is used for cushioning materials, filling materials, filters for automobiles, etc., and semi-rigid foam is a heat or electric insulation material, and the rigid foam is light, has low elasticity, has a high load-bearing capacity and excellent thermal insulation. It is widely used as mechanical parts, industrial and household insulation materials, and soundproof panels.

그러나, 폴리우레탄 폼은 사용 용도에 따라 요구되는 특성이 많이 있어 이를 충족시키기 위해서는 각종 첨가제가 첨가되고 있는 실정이지만, 여러 가지 요구 특성이 있는 경우에는 첨가제의 종류도 많아져야 하므로 경제적으로 바람직하지 못한 단점이 있고, 공정이 복잡해지며, 제조되는 폴리우레탄 폼 자체의 특성이 저하되는 문제가 있고, 1종의 첨가제로 많은 요구 특성을 만족시킬 수 없는 단점이 있다.However, polyurethane foam has many required properties depending on the intended use, and various additives are added to meet this requirement. However, if there are various required properties, the types of additives have to be increased. There is a problem in that the process is complicated, the properties of the polyurethane foam itself is lowered, there is a disadvantage that can not satisfy many of the required properties with one additive.

한편, 부직포(non-woven)는 짜거나 뜨지 않은 즉, 직조하지 않고 만든 천으로서, 탄력이 풍부하고, 복원성이 크기 때문에, 인조피혁 기포, 기저귀, 의복용 심지로 주로 사용되고, 그 밖에 일회용 침대시트, 열 및 전기 절연용재, 수출용 포대, 붕대, 타월, 냅킨 등 다양한 용도로 사용되고 있으나, 부직포를 폴리우레탄 폼에 적용하여, 한 성형체 내에서 다중 밀도를 갖는 폴리우레탄 폼 성형체를 제조한 예는 아직까지 알려진 바 없다.On the other hand, non-woven fabric is a non-woven fabric that is not woven or knitted, that is, it is mainly used for artificial leather bubbles, diapers, and clothing wicks because of its rich elasticity and high resilience. Although it is used for various purposes such as thermal and electrical insulation materials, export bags, bandages, towels, napkins, etc., a non-woven fabric is applied to polyurethane foam to manufacture polyurethane foam molded articles having multiple densities in one molding. None known.

따라서, 본 발명의 목적은 다중 밀도를 가지고 있어 여러 가지 용도로 사용이 가능한 폴리우레탄 폼 성형체를 제공하는 것이다.Accordingly, it is an object of the present invention to provide a polyurethane foam molded body having multiple densities and which can be used for various purposes.

본 발명의 다른 목적은 상기한 폴리우레탄 폼 성형체를 제조하는 방법을 제공하는 것이다.Another object of the present invention is to provide a method for producing the above-mentioned polyurethane foam molded article.

도 1은 본 발명의 방법으로 폴리우레탄 폼 성형체를 제조하는 일예이다.1 is an example of manufacturing a polyurethane foam molded article by the method of the present invention.

<도면부호에 대한 설명><Description of Drawing>

1. 볼부분 내측부(inside ball part) 2. 힐부분 내측부(inside heel part)1. Inside ball part 2. Inside heel part

3. 아치부(arch) 4. 힐부분(heel part)3. arch 4. heel part

5. 아치부 6. 볼부분(ball part)5. Arch part 6. Ball part

상기한 목적을 달성하기 위하여, 본 발명에 따른 폴리우레탄 폼 성형체의 제조방법은, 성형체의 제조시 다른 밀도를 제공하고자 하는 부위, 즉 소정의 부위에 부직포를 부가한 후, 성형함을 특징으로 한다.In order to achieve the above object, the method for producing a polyurethane foam molded article according to the present invention is characterized in that after forming a non-woven fabric to a portion, that is, a predetermined portion to provide a different density in the manufacture of the molded article, .

이하, 본 발명을 보다 구체적으로 설명한다.Hereinafter, the present invention will be described in more detail.

본 발명에 따른 다중 밀도를 갖는 폴리우레탄 폼 성형체는 성형체를 성형하는데 있어, 밀도를 다르게 하고자 하는 부위에 부직포를 부가한 후, 성형하는 것을 특징으로 한다.Polyurethane foam molded article having a multi-density according to the present invention is characterized in that, after forming the molded body, after the non-woven fabric is added to the site to be different in density, it is molded.

본 발명에 따른 성형체는 부직포를 부가하는 것에 의해, 인장강도, 인장신도, 인열강도 및 경도가 향상되며, 부가되는 부직포의 종류에 의해서도 다양한 물성을 갖는다.The molded article according to the present invention improves tensile strength, tensile elongation, tear strength and hardness by adding a nonwoven fabric, and has various physical properties depending on the type of nonwoven fabric added.

이하, 성형체로서 신발의 미드솔(midsole)을 예를 들어 설명한다.Hereinafter, the midsole of a shoe is demonstrated as a molded object, for example.

신발에 있어서, 신발의 밑창을 이루는 부위 중 저면을 이루는 겉창(outsole)과 갑피(upper)와 겉창의 중간 부분을 이루는 미드솔이 있는데, 현재 폴리우레탄 폼 재질로 된 미드솔(이하, 'PU 미드솔'이라 한다)은 이러한 다중밀도를 갖는 미드솔을 제작할 수가 없어 한가지 밀도의 제품만 생산되어 왔다.In shoes, there are outsoles that form the soles of the soles of the shoes, and midsoles that form the middle of the upper and outsoles, which are currently made of polyurethane foam (hereinafter referred to as 'PU midsoles'). Cannot produce such a multi-density midsole, and only one density product has been produced.

그러나, 한가지 밀도의 미드솔은 신발의 기능향상에 장애가 되는 요소가 되어 E.V.A 스폰지 재질로된 미드솔의 경우에는 경도가 다른 미드솔을 각각 성형한후, 접착하여 사용하여 왔다(파이론(phylon) 미드솔) .However, one density of midsole has become an obstacle to improving the function of shoes. In the case of midsole made of E.V.A sponge material, a midsole having a different hardness has been molded and then bonded to each other (phylon midsole).

따라서, 본 발명에서는 신발의 미드솔을 제조하는데 있어, 미드솔의 중간부위에 부직포를 넣고 성형하는 것에 의해 신발의 기능상 필요한 부분에 원하는 밀도를 조절하여 생산할 수 있어, PU 미드솔을 사용한 신발에도 다중밀도 기능 제품이 될 수 있도록 한 것이다.Therefore, in the present invention, in manufacturing the shoe midsole, by inserting the nonwoven fabric in the middle portion of the midsole can be produced by adjusting the desired density in the necessary portion of the functional function of the shoe, a multi-density functional product for shoes using PU midsole This would be to be.

본 발명의 폴리우레탄 폼 성형체의 제조방법은, 상기한 신발의 미드솔을 제조하는데 뿐만아니라, 신발의 뒷꿈치 부위, 안장, 헬멧, 장갑, 방석 등, 다중 밀도를 요구하는 폴리우레탄 폼 성형체의 제조에 제한없이 사용될 수 있다.The method for producing a polyurethane foam molded article of the present invention is not only used to manufacture the midsole of the shoe, but also limited to the production of a polyurethane foam molded article requiring multiple densities such as a heel portion, a saddle, a helmet, a glove, a cushion, and the like of the shoe. Can be used without.

본 발명에서 성형체를 성형하는 방법은 본 발명이 속하는 기술분야에서 통상의 지식을 가진자이면 용이하게 유추할 수 있을 것이다.In the present invention, a method of molding a molded article may be easily inferred by those skilled in the art.

이하, 실시예 및 시험예를 들어 본 발명을 상세히 설명하지만, 본 발명이 이들 예로만 한정되는 것은 아니다.Hereinafter, although an Example and a test example are given and this invention is demonstrated in detail, this invention is not limited only to these examples.

[실시예 1] 신발 미드솔의 제조Example 1 Preparation of Shoe Midsole

신발의 PU 미드솔을 제조하기 위한 주형틀(mold)에 폴리우레탄 폼을 주입한 다음, 도 1에 나타낸 바와 같이, 신발 미드솔의 볼부분 내측부(1; inside ball part), 힐부분 내측부(2; inside back part seat) 및 아취부(arch)에 동시 혹은 각각 부직포를 부가하였다. 그 위에 폴리우레탄 폼을 다시 주입하고, 주형틀 뚜껑을 닫은 후, 일정시간 경과하여 성형된 완제품 PU 미드솔을 주형틀로부터 분리하였다.After injecting a polyurethane foam into a mold for manufacturing the PU midsole of the shoe, as shown in Figure 1, inside the ball part (1; inside ball part), the heel part (2; inside) of the shoe midsole Nonwoven fabrics were added simultaneously or separately to the back part seat and arch. Polyurethane foam was re-injected thereon, the mold lid was closed, and the finished PU midsole formed after a predetermined time was separated from the mold.

[시험예 1][Test Example 1]

폴리우레탄 폼에 부직포를 주입하였을 경우의 인장강도, 인장신도, 인열강도및 비중과 같은 기계적 물성값을 변화를 측정였다. 측정은 한국섬유기술연구소에 의뢰하였으며, 그 결과는 다음 표 1과 같다.The mechanical properties such as tensile strength, tensile elongation, tear strength and specific gravity were measured when the nonwoven fabric was injected into the polyurethane foam. The measurement was requested by the Korea Textile Technology Research Institute, and the results are shown in Table 1 below.

[시험예 2][Test Example 2]

폴리우레탄 폼에 부직포를 주입하였을 경우에, 경도 및 후도를 측정하고, 그 결과를 표 2에 나타내었다. 표 2에서 A는 100% 폴리우레탄 폼이고, B와 C는 니들 펀칭 부직포를 부가한 폴리우레탄 폼이며, D는 루프 부직포를 부가한 폴리우레탄 폼이다. 한편, 니들 펀칭 부직포는 섬유 원료를 카딩하여 웨브(web)를 만든 후, 니들 펀칭하여 부직포를 제조한 것으로, B의 경우 폴리에스테르 100% 섬유를 원료로 한 것이고, C는 나이론 60%와 폴리에스테르 40%를 원료로 한 것이다. 또한, 루프 부직포는 섬유원료를 카딩하여 웨브를 만든 후, 루프 형태로 접은 상태로 열처리기에서 열처리하여 제조한 것으로, D는 폴리프로필렌 20%, 폴리에틸렌 20% 및 폴리에스테르 60를 원료로 한 것이다.When the nonwoven fabric was injected into the polyurethane foam, hardness and thickness were measured, and the results are shown in Table 2. In Table 2, A is 100% polyurethane foam, B and C are polyurethane foams with needle punched nonwovens, and D is polyurethane foams with loop nonwovens. On the other hand, needle punched nonwoven fabric is made of a web (web) by carding the raw material of the fiber, then needle punched to produce a nonwoven fabric, B is made of 100% polyester raw material, C is nylon 60% and polyester 40% is used as a raw material. In addition, the loop nonwoven fabric is made by carding the fiber material to make a web, and then heat-treated in a heat treatment apparatus in a folded state in a loop form, and D is made of 20% polypropylene, 20% polyethylene, and 60 polyester.

이상에서 설명한 바와 같이, 본 발명의 방법으로 폴리우레탄 성형체를 성형하면, 경제적이면서 간편한 방법으로 성형체를 성형할 수 있다.As described above, when the polyurethane molded product is molded by the method of the present invention, the molded product can be molded by an economical and convenient method.

Claims (3)

폴리우레탄 폼 성형체를 제조하는데 있어서,In producing polyurethane foam moldings, 성형체 내의 소정의 부위에 부직포를 부가하는 것에 의해, 밀도가 다른 폴리우레탄 폼 성형체를 제조하는 방법.A method for producing a polyurethane foam molded article having a different density by adding a nonwoven fabric to a predetermined portion in the molded body. 제 1항에서, 성형체가 신발의 PU 미드솔이며, 소정의 부위가 볼부분 내측부(inside ball part), 힐부분 내측부(inside back part seat) 및 아취부(arch)로 이루어진 군에서 선택된 1종 이상 임을 특징으로 하는 방법.The method of claim 1, wherein the molded body is a PU midsole of the shoe, and the predetermined part is at least one selected from the group consisting of an inner ball part, an inner back part seat and an arch. How to feature. 제 1항에 있어서, 성형체가 신발의 뒷꿈치 부위, 안장, 헬멧, 장갑 또는 방석임을 특징으로 하는 방법.The method of claim 1 wherein the shaped body is a heel portion of the shoe, a saddle, a helmet, a glove or a cushion.
KR1020000029448A 2000-05-30 2000-05-30 Method for preparing polyurethane foam molding having multidensities KR20010108706A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140534A (en) * 1979-04-23 1980-11-04 Ikeda Bussan Co Ltd Preparing method for composite pad stuff
JPS62140810A (en) * 1985-12-16 1987-06-24 Meiwa Sangyo Kk Manufacture of composite molded material
JPH11192628A (en) * 1997-12-29 1999-07-21 Ts Tech Co Ltd Manufacture of seat pad
KR20000000207A (en) * 1999-10-01 2000-01-15 롤프 에취, 켈러, 카즈노리 이마무라 Internal Sheet of Moter and Method For Manufacturing The Same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140534A (en) * 1979-04-23 1980-11-04 Ikeda Bussan Co Ltd Preparing method for composite pad stuff
JPS62140810A (en) * 1985-12-16 1987-06-24 Meiwa Sangyo Kk Manufacture of composite molded material
JPH11192628A (en) * 1997-12-29 1999-07-21 Ts Tech Co Ltd Manufacture of seat pad
KR20000000207A (en) * 1999-10-01 2000-01-15 롤프 에취, 켈러, 카즈노리 이마무라 Internal Sheet of Moter and Method For Manufacturing The Same

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