KR100967137B1 - the ethylene vynil acetate copolymer composition for insole and the manufacturing method for insole sponge utilizing the same - Google Patents
the ethylene vynil acetate copolymer composition for insole and the manufacturing method for insole sponge utilizing the same Download PDFInfo
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- KR100967137B1 KR100967137B1 KR1020080102579A KR20080102579A KR100967137B1 KR 100967137 B1 KR100967137 B1 KR 100967137B1 KR 1020080102579 A KR1020080102579 A KR 1020080102579A KR 20080102579 A KR20080102579 A KR 20080102579A KR 100967137 B1 KR100967137 B1 KR 100967137B1
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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
- C08K11/00—Use of ingredients of unknown constitution, e.g. undefined reaction products
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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
- C08J9/22—After-treatment of expandable particles; Forming foamed products
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
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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
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
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Abstract
본 발명은 신발 안창용 에틸렌 비닐아세테이트 공중합체 조성물 및 이를 이용한 신발 안창용 스폰지 제조방법을 개시한다.The present invention discloses a shoe insole ethylene vinyl acetate copolymer composition and a method for manufacturing a shoe insole sponge using the same.
본 발명은, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부, 발포제 2.0-8.0중량부로 이루어진 것을 특징으로 하며, 그 제조방법은, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부를 혼합기에 넣고 70-90℃에서 12-14분 혼합한 후, 발포제 2.0-8.0중량부를 투입하여 1-3분간 혼합하는 1차 혼합공정과; 상기 1차 혼합된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분간 혼합하는 2차 혼합공정과; 상기 2차 혼합된 배합물을 상온에서 2시간이상 냉각 및 숙성시키는 공정과; 상기 숙성된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분 동안 재혼합하는 3차 혼합공정과; 상기 3차 혼합된 배합물을 3본 카렌다에서 가로600mm, 세로 1000mm, 두께 2-3mm로 절단하여 상온에서 2시간이상 냉각 숙성시키는 공정과; 상기 냉각 숙성된 배합물을 금형 규격에 따라 평량한 다음 금형에 투입한 후 온도 150-160℃ 압력 150-160kgf/㎠의 압력으로 42분간 가류 및 발포하는 프레스 발포 공정과; 상기 프레스 발포 공정을 통해 제조된 스펀지를 냉각하는 공정;을 포함하여 된 것을 그 특징으로 하는 것으로서, 에틸렌 비닐아세테이트 공중합체상에 천연코르크와 소금이 첨가됨으로써 합성수지와 코르크의 물리적 특성이 상호 보완작용을 하여 압축변형, 내열성, 천연 코르크향 등의 특성을 향상시킬 수 있으며, 천연 소금이 갖고 있는 방부효과, 발한기능, 삼투압, 풍부한 미네랄 등에 의해 이를 착용하는 사람의 발 건강을 크게 향상시킬 수 있게 된다.The present invention is composed of 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of cork fine powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener, 0.5-1.5 parts by weight of crosslinking agent, and 2.0-8.0 parts by weight of foaming agent. The manufacturing method is 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of fine cork powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener, 0.5-1.5 parts by weight of crosslinking agent in a mixer 70 After mixing for 12-14 minutes at -90 ℃, 2.0-8.0 parts by weight of blowing agent is mixed for 1-3 minutes; A secondary mixing step of mixing the first blended blend for 13-17 minutes at a surface temperature of 70-80 ° C. on a mixing roll; Cooling and aging the secondary mixed formulation at room temperature for at least 2 hours; A third mixing step of remixing the aged blend in a mixing roll at a surface temperature of 70-80 ° C. for 13-17 minutes; Cutting the third blended compound into three 600 calenders in width 600mm, length 1000mm, thickness 2-3mm and cooling and aging at room temperature for at least 2 hours; Press-cooling the foamed and matured compound according to the mold specification, and then pouring into the mold and vulcanizing and foaming for 42 minutes at a temperature of 150-160 ° C. and 150-160 kgf / cm 2; The step of cooling the sponge produced by the press-foaming process; characterized in that it comprises a natural cork and salt on the ethylene vinyl acetate copolymer is added to the physical properties of the synthetic resin and cork complement It can improve the properties of compression deformation, heat resistance, natural cork scent, etc., and by using the antiseptic effect, sweating function, osmotic pressure, abundant minerals, etc. of the natural salt can significantly improve the health of the person wearing it.
Description
본 발명은 천연 코르크향과 천연 소금이 지니고 있는 풍부한 미네랄과 방부효과, 신진대사 기능, 발한기능, 삼투압 등의 특성을 이용하여 발 냄새 방지와 발바닥의 피부 보호 및 박테리아 번식을 방지할 수 있는 신발 안창용 에틸렌 비닐아세테이트 공중합체 조성물 및 이를 이용한 신발 안창용 스폰지 제조방법에 관한 것이다.The present invention is a shoe insole that can prevent foot odor, protect the skin of the sole and propagation of bacteria by using the rich mineral and antiseptic effect, metabolic function, sweating function, osmotic pressure and the like with natural cork flavor and natural salt. The present invention relates to an ethylene vinyl acetate copolymer composition and a method for manufacturing a shoe insole using the same.
일반적으로, 신발의 안창은 일정한 경도, 인장력 신장력, 복원력, 충격흡수, 성형성 등 각기 특성에 맞게 요구되는 물리적인 특성이 매우 중요하다.In general, the insole of the shoe is very important physical properties required for each characteristic, such as constant hardness, tensile force, restoring force, impact absorption, formability.
이외에 신발의 안창은 체내에서 분비되는 땀으로 인하여 고약한 냄새와 병원체의 온상으로서 사람들의 대부분이 발 냄새와 무좀, 습진 등으로 고생하고 있는 바, 이를 방지하고자 화학적인 향료나 무좀 방지제등을 신발 안창의 원단 또는 접 착제등에 혼합하여 사용하고 있다.In addition, insoles of shoes are nasty smells and hotbeds of pathogens due to sweat secreted by the body, and most people suffer from foot odors, athlete's foot, eczema, etc. It is mixed and used for fabric or adhesive.
또한 이러한 조건을 충족시키기 위하여 열가소성의 합성수지 스펀지를 대부분 사용하고 있다.In addition, in order to satisfy these conditions, most of thermoplastic resin sponges are used.
이와 같이 합성수지 스펀지는 신발 안창이 요구하는 물리적인 특성을 대부분 우수하나 합성수지 스펀지의 구조상 비통기성(CLOSE-CELL)이기 때문에 냄새, 무좀, 습진 등에서 매우 취약하여 이를 방지하는 효과가 매우 미약하다.As such, the synthetic sponge is most excellent in the physical properties required by the shoe insole, but because of the structural breathability (CLOSE-CELL) of the synthetic resin sponge is very fragile in odor, athlete's foot, eczema, etc., the effect is very weak.
한편, 이러한 종래의 합성수지 스펀지 제조방법을 보면, 에틸렌 비닐아세테이트 공중합체(이하 EVA라 약칭함)에 발포제, 조제, 가교제 등을 배합하여 혼합기에 1차 믹싱을 한 후, 롤러에서 2차 믹싱을 행하고 카렌다(calender)에서 두께 2-4mm로 씨트를 만든 다음 냉각을 한 후 열프레스에서 압축 가열하여 제조한다.On the other hand, in the conventional synthetic resin sponge manufacturing method, a foaming agent, a preparation agent, a crosslinking agent, and the like are mixed with an ethylene vinyl acetate copolymer (hereinafter abbreviated as EVA), followed by primary mixing in a mixer, followed by secondary mixing on a roller. The sheet is made in a calender (2-4 mm thick), cooled, and then compressed and heated in a hot press.
이때 평판 스펀지의 규격은 금형 치수와 발포 배율에 따라 다르게 나타난다.At this time, the specification of the flat sponge is different depending on the mold size and the expansion ratio.
그리고 발 냄새를 중화시키기 위하여 안창 제조시 원단에 향료 또는 약품 처리를 하거나, 합성수지 스펀지와 원단을 접착 시킬 때 사용하는 접착제에 향료 또는 약품을 혼합하기도 한다.In order to neutralize foot odors, perfume or chemical treatment may be applied to the fabric when the insole is manufactured, or the adhesive or chemical may be mixed with the adhesive used to bond the fabric with the synthetic sponge.
그러나 이러한 방법은 시간이 지나면 효능이 쉽게 감소되며, 땀 냄새와 향료 냄새가 혼합하여 더 심한 악취의 원인이 되어 오히려 역효과를 나타낼 수 있는 문제점이 있다.However, this method has a problem that the efficacy is easily reduced over time, and the smell of sweat and fragrance is mixed to cause a more bad odor, which may have a rather adverse effect.
또한 무좀 방지약품을 처리한 원단은 세척 후에는 효과가 감소함으로써 본래의 기능을 상실하며, 접착제 또는 합성수지에 혼합하여 처리된 것은 제 기능을 발휘하지 못하는 문제점이 야기된다.In addition, the fabric treated with the athlete's foot anti-drug agent loses its original function by reducing the effect after washing, and the mixed with the adhesive or the synthetic resin causes a problem that it does not function properly.
이는 접착제에 약품 또는 향료를 혼합할 경우 약품, 향료의 표면에 접착제가 코팅되어 약품, 향료의 성능을 방해하기 때문이다.This is because when the drug or the perfume is mixed in the adhesive, the adhesive is coated on the surface of the drug and the perfume, which interferes with the performance of the medicine and the perfume.
또한 합성수지 스펀지에 혼합할 경우 그 자체 특성인 비통기성 셀로 인하여 효과가 감소하기 때문이다.In addition, when mixed with a synthetic sponge, the effect is reduced due to its own non-breathing cell.
상술한 문제점을 해소하기 위한 본 발명의 목적은 단위 면적당 수많은 기공을 가진채 복원력과 경량 그리고 천연향을 갖는 천연 코르크와, 신진대사 촉진, 풍부한 미네랄, 청정 및 방부효과, 삼투압, 발한기능을 갖는 소금을 배합하여 신발안창의 특성에 맞는 EVA 및 이를 이용한 신발안창 제조용 스펀지를 제공함에 그 목적이 있다.An object of the present invention for solving the above problems is a natural cork having resilience, light weight and natural flavor with numerous pores per unit area, metabolism promotion, rich minerals, clean and antiseptic effect, osmotic pressure, salt with sweating function Its purpose is to provide an EVA and a sponge for manufacturing shoe insoles using the same according to the characteristics of the shoe insole.
상기와 같은 목적을 달성하기 위한 본 발명에 따른 신발 안창용 에틸렌 비닐아세테이트 공중합체는, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부, 발포제 2.0-8.0중량부로 이루어진 것을 그 특징으로 한다.Ethylene vinyl acetate copolymer for shoe insoles according to the present invention for achieving the above object, 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of cork fine powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener It is characterized by consisting of 0.5-1.5 parts by weight of crosslinking agent, 2.0-8.0 parts by weight of blowing agent.
본 발명의 신발 안창용 스펀지 제조방법은, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부를 혼합기에 넣고 70-90℃에서 12-14분 혼합한 후, 발포제 2.0-8.0중량부를 투입하는 1-3분간 혼합하는 1차 혼합공정과; 상기 1차 혼합된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분간 혼합하는 2차 혼합공정과; 상기 2차 혼합된 배합물을 상온에서 2시간이상 냉각 및 숙성시키는 공정과; 상기 숙성된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분동안 재혼합하는 3차 혼합공정과; 상기 3차 혼합된 배합물을 3본 카렌다에서 가로600mm, 세로 1000mm, 두께 2-3mm로 절단하여 상온에서 2시간이상 냉각 숙성시키는 공정과; 상기 냉각 숙성된 배합물을 금형 규격에 따라 평량한 다음 금형에 투입한 후 온도 150-160℃ 압력 150-160kgf/㎠의 압력으로 42분간 가류 및 발포하는 프레스 발포 공정과; 상기 프레스 발포 공정을 통해 제조된 스펀지를 냉각하는 공정;을 포함하여 된 것을 그 특징으로 한다.Sponge manufacturing method of the shoe insole of the present invention, 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of cork fine powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener, 0.5-1.5 parts by weight of crosslinking agent in a mixer After mixing for 12-14 minutes at 70-90 ℃, mixing for 1-3 minutes to add 2.0-8.0 parts by weight of blowing agent; A secondary mixing step of mixing the first blended blend for 13-17 minutes at a surface temperature of 70-80 ° C. on a mixing roll; Cooling and aging the secondary mixed formulation at room temperature for at least 2 hours; A third mixing step of remixing the aged blend in a mixing roll at a surface temperature of 70-80 ° C. for 13-17 minutes; Cutting the third blended compound into three 600 calenders in width 600mm, length 1000mm, thickness 2-3mm and cooling and aging at room temperature for at least 2 hours; Press-cooling the foamed and matured compound according to the mold specification, and then pouring into the mold and vulcanizing and foaming for 42 minutes at a temperature of 150-160 ° C. and 150-160 kgf / cm 2; It characterized in that it comprises a; step of cooling the sponge produced by the press foaming process.
상술한 본 발명에 따른 특징으로 인해 기대되는 효과로는, 에틸렌 비닐아세테이트 공중합체상에 천연코르크와 소금이 첨가됨으로써 합성수지와 코르크의 물리적 특성이 상호 보완작용을 하여 압축변형, 내열성, 천연 코르크향 등의 특성을 향상시킬 수 있으며, 천연 소금이 갖고 있는 방부효과, 발한기능, 삼투압, 풍부한 미네랄 등에 의해 이를 착용하는 사람의 발 건강을 크게 향상시킬 수 있게 된다.As expected effects due to the characteristics of the present invention described above, the physical properties of the synthetic resin and cork by the addition of natural cork and salt on the ethylene vinyl acetate copolymer to complement the compression deformation, heat resistance, natural cork flavor, etc. It is possible to improve the characteristics of the natural salt has the preservative effect, sweating function, osmotic pressure, abundant minerals, etc., it will be able to greatly improve the foot health of the person wearing it.
이하 본 발명에 따른 신발 안창용 에틸렌 비닐아세테이트 공중합체 조성물 및 이를 이용한 신발 안창용 스폰지 제조방법을 상세히 설명하면 다음과 같다.Hereinafter, a shoe insole ethylene vinyl acetate copolymer composition according to the present invention and a method for manufacturing a shoe insole sponge using the same will be described in detail.
먼저, 신발 안창용 에틸렌 비닐아세테이트 공중합체 조성물은, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부, 발포제 2.0-8.0중량부로 이루어진다.First, the ethylene vinyl acetate copolymer composition for shoe insole is 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of cork fine powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener, 0.5-1.5 parts by weight of crosslinking agent, It consists of 2.0-8.0 weight part of blowing agents.
이때 코르크 미분말은 통상의 천연 코르크를 이용하여 평균입경이 0.1-3.0mm이 되도록 분말화하여 사용되어지며, 소금 역시 동일한 입경을 갖도록 분말화하여 사용된다.At this time, the fine cork powder is used by powdering so that the average particle size is 0.1-3.0mm using a normal natural cork, salt is also used to powder to have the same particle diameter.
한편, EVA 100중량부에 대해 코르크 미분말을 5-50중량부를 첨가하는 것은, 첨가량이 5중량부 미만인 경우에는 코르크가 갖는 물리적 성질을 기대할 수 없기 때문이고, 50중량부를 초과할 경우에는 발포 불량과 작업성이 현저하게 떨어지기 때문이다.On the other hand, 5-50 parts by weight of fine cork powder is added to 100 parts by weight of EVA because the physical properties of cork cannot be expected when the amount is less than 5 parts by weight. This is because workability is significantly reduced.
또한 코르크 미분말의 직경을 0.1-3.0mm의 범위로 하는 이유는 0.1mm 미만일 경우에는 코르크 입자가 미세하여 코르크 형상이 나타나지 않기 때문이며, 3.0mm을 초과할 경우에는 코르크 입자가 서로 연결되어 오픈셀이 되어 불량이 발생되기 때문이다.In addition, the diameter of the fine cork powder is in the range of 0.1-3.0mm because the cork particles are fine when the diameter is less than 0.1mm and the cork shape does not appear. When the thickness exceeds 3.0mm, the cork particles are connected to each other to form an open cell. This is because a defect occurs.
소금의 입경 역시 0.1mm-3.0mm의 분말을 사용하는 것은, 입경이 미분말일 수록 분산이 용이하기 때문에 좋은 제품을 얻을 수 있기 때문이다.The particle size of the salt is also used because the powder of 0.1mm-3.0mm, because the finer the particle diameter is easier to disperse, it is possible to obtain a good product.
한편, 그 첨가량을 0.5-12중량부로 하는 이유는, 0.5중량부 미만일 경우에는 염도가 너무 낮아 소금이 갖고 있는 효과가 미흡하며, 12중량부를 초과할 경우에는 염도가 너무 높아 제품의 표면에 침출이 발생될 우려가 있고 제품의 물성을 저하시키기 때문이다.On the other hand, the reason why the addition amount is 0.5-12 parts by weight is less than 0.5 parts by weight of salinity is too low to have the effect of salt, and when it exceeds 12 parts by weight, the salinity is too high and leaching on the surface of the product This is because there is a possibility to occur and the physical properties of the product is lowered.
상술한 연화제로는 스테아린산이 사용됨이 바람직한 바, 그 첨가량은 0.5-2.5중량부로 하는 것은, 첨가량이 0.5 미만일 경우에는 유연성의 감소 및 혼합 작업이 나빠지기 때문이며, 2.5중량부를 초과할 경우에는 표면에 침출이 발생되거나 물성이 저하되는 문제점이 발생되기 때문이다.Stearic acid is preferably used as the above-mentioned softener. The addition amount is 0.5-2.5 parts by weight because the decrease in flexibility and poor mixing work when the addition amount is less than 0.5, and leaching on the surface when it exceeds 2.5 parts by weight. This is because there is a problem that occurs or the physical properties are lowered.
한편, 상술한 연화제로 스테아린산이 사용되는 것은 이에 한정되지 않으며, 물성의 저하를 저해하지 않는 범위에서 통상의 다른 연화제를 사용할 수 있음은 당업자라면 주지할 수 있는 사실일 것이다.On the other hand, stearic acid is used as the softener described above is not limited to this, it will be known to those skilled in the art that other conventional softeners can be used in a range that does not inhibit the deterioration of physical properties.
본 발명의 가교제로는 DCP(Dicumyl-Peroxide)를 사용함이 바람직하며, 그 첨가량을 0.5-1.5로 한정하는 이유는, 0.5중량부 미만일 경우에는 미가류 현상이 발생하거나 가류시간이 길어져 생산성이 떨어지는 문제점이 발생되기 때문이며, 1.5중량부를 초과할 경우에는 과가류 현상이 발생되어 발포율이 저하되고 기포 불량 등으로 인한 물성 저하의 문제점이 발생되기 때문이다.DCP (Dicumyl-Peroxide) is preferably used as the crosslinking agent of the present invention, and the reason for limiting the amount thereof to 0.5-1.5 is that when the amount is less than 0.5 parts by weight, the unvulcanized phenomenon occurs or the vulcanization time is long, resulting in poor productivity. This is because, when it exceeds 1.5 parts by weight, the excessive vulcanization phenomenon occurs, the foaming rate is lowered, and the problem of physical properties lowering due to poor bubble or the like occurs.
또한 가교제로 DCP를 사용하는 것은 이에 한정되지 않으며, 물성저하를 저해하지 않는 이상 통상의 다른 가교제를 사용할 수 있다.In addition, the use of DCP as the crosslinking agent is not limited thereto, and other conventional crosslinking agents may be used as long as the physical property degradation is not inhibited.
본 발명의 발포제로는 아조디카본아마이드(AD Azo-di-carbon-amide)가 사용함이 바람직하며, 그 첨가량을 2.0-8.0중량부로 한정하는 이유는, 2.0중량부 미만일 경우에는 저 발포로 인하여 경도와 비중이 높아져 스펀지 기능이 상실되는 문제 점이 발생되기 때문이며, 8.0중량부를 초과할 경우에는 과다 발포로 스펀지 불량이 발생되기 때문이다.As the blowing agent of the present invention, it is preferable to use azodicarbonamide (AD Azo-di-carbon-amide), and the reason for limiting the addition amount thereof to 2.0-8.0 parts by weight is that the hardness is less than 2.0 parts by weight due to low foaming. This is because a problem arises that the sponge function is lost due to the increase of the specific gravity. If the amount exceeds 8.0 parts by weight, the foam is defective due to excessive foaming.
이러한 발포제로는 역시 물성 저하를 저해하지 않는 범위에서 통상의 발포제가 사용될 수 있을 것이다.As such a foaming agent, a conventional foaming agent may also be used in a range that does not inhibit the deterioration of physical properties.
이외에도 본 발명에 따른 조성물 외에 본 발명의 특징을 저해하지 않는 범위에서 신발 안창의 사용용도 및 물성을 조절하기 위하여 각종 브랜드용 수지, 고무, 또는 기타의 충진제를 첨가할 수 있는 것은 자명한 사실이다.In addition to the composition according to the present invention, it is obvious that various brands of resin, rubber, or other fillers may be added to control the use and physical properties of the shoe insole in a range that does not impair the characteristics of the present invention.
한편, 이러한 에틸렌 비닐아세테이트 공중합체 조성물을 이용하여 신발안창을 제조하기 위한 스펀지를 제조하는 공정을 보면 다음과 같다.On the other hand, using the ethylene vinyl acetate copolymer composition is a process for producing a sponge for producing a shoe insole is as follows.
먼저, 에틸렌 비닐아세테이트 공중합체 100중량부, 코르크 미분말 5-50중량부, 소금 0.5-12중량부, 연화제 0.5-2.5중량부, 가교제 0.5-1.5중량부를 혼합기에 넣고 70-90℃에서 12-14분 혼합한 후, 발포제 2.0-8.0중량부를 투입하는 1-3분간 혼합하는 1차 혼합공정을 수행한다.First, 100 parts by weight of ethylene vinyl acetate copolymer, 5-50 parts by weight of fine cork powder, 0.5-12 parts by weight of salt, 0.5-2.5 parts by weight of softener and 0.5-1.5 parts by weight of crosslinking agent were put into a mixer at 12-14 at 70-90 ° C. After the minute mixing, a primary mixing step of mixing for 1-3 minutes to add 2.0-8.0 parts by weight of blowing agent is carried out.
그리고 1차 혼합된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분간 혼합하는 2차 혼합공정과, 2차 혼합된 배합물을 상온에서 2시간이상 냉각 및 숙성시키는 공정을 수행한다.In addition, a secondary mixing step of mixing the first blended blend in a mixing roll at a surface temperature of 70-80 ° C. for 13-17 minutes, and a step of cooling and aging the second blended blend at room temperature for 2 hours or more.
다음으로 숙성된 배합물을 믹싱롤에서 표면온도 70-80℃에서 13-17분 동안 재혼합하는 3차 혼합공정을 수행하고, 3차 혼합된 배합물을 3본 카렌다에서 가로600mm, 세로 1000mm, 두께 2-3mm로 절단하여 상온에서 2시간이상 냉각 숙성시키는 공정을 수행한다.Next, the third blending process is performed by mixing the aged blends in a mixing roll for 13-17 minutes at a surface temperature of 70-80 ° C. The third blended blend is 600mm wide, 1000mm long and 2 thick in a three calender. Cut to -3mm to carry out the cooling aging at room temperature for at least 2 hours.
냉각 숙성된 배합물을 금형 규격에 따라 평량한 다음 금형에 투입한 후 온도 150-160℃ 압력 150-160kgf/㎠의 압력으로 42분간 가류 및 발포하는 프레스 발포 공정을 수행한 다음 최종적으로 프레스 발포 공정을 통해 제조된 스펀지를 냉각하는 공정을 수행하게 되면 소망하는 신발 안창 제조용 스펀지를 얻게 된다.After weighing the cooled and matured compound according to the mold specification, it is put into the mold and subjected to a press foaming process of vulcanization and foaming for 42 minutes at a temperature of 150-160 ° C and a pressure of 150-160kgf / cm2. Performing a process for cooling the sponge produced through the to obtain a sponge for manufacturing a shoe insole desired.
한편, 상술한 배합물의 투입 중량은 금형 규격에 따라 다르게 평량되어야 하며, 그 계산 방법은 다음의 수학식과 같다.On the other hand, the input weight of the above-described formulation should be basis weight differently according to the mold standard, the calculation method is as follows.
수학식Equation
투입중량=(금형의 가로x세로x높이)/압축 배합물의 비중Input weight = (width x height x height of mold) / specific gravity of compression formulation
이상의 설명에서 본 발명은 특정의 실시 예와 관련하여 도시 및 설명하였지만, 특허청구범위에 의해 나타난 발명의 사상 및 영역으로부터 벗어나지 않는 한도 내에서 다양한 개조 및 변화가 가능하다는 것을 당 업계에서 통상의 지식을 가진 자라면 누구나 쉽게 알 수 있을 것이다.While the invention has been shown and described with respect to the specific embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Anyone with it will know easily.
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