KR20020088727A - Simple Method for Midsole - Google Patents

Simple Method for Midsole Download PDF

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Publication number
KR20020088727A
KR20020088727A KR1020010027606A KR20010027606A KR20020088727A KR 20020088727 A KR20020088727 A KR 20020088727A KR 1020010027606 A KR1020010027606 A KR 1020010027606A KR 20010027606 A KR20010027606 A KR 20010027606A KR 20020088727 A KR20020088727 A KR 20020088727A
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South Korea
Prior art keywords
ethylene
mold
minutes
sheet
flow index
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KR1020010027606A
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Korean (ko)
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임권택
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임권택
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Priority to KR1020010027606A priority Critical patent/KR20020088727A/en
Publication of KR20020088727A publication Critical patent/KR20020088727A/en

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Classifications

    • 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
    • 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
    • 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
    • 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
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • 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
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/08—Copolymers of ethylene
    • B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer

Abstract

PURPOSE: A simple manufacturing method of a middle sole of shoes is provided to improve a mold ability and simplify a manufacturing procedure of the middle sole, thus considerably reducing a production cost. CONSTITUTION: The manufacturing method of a shoe middle sole comprises the steps of: preparing a base material composed of ethylene-vinyl acetate copolymer in which a melting flow index is 1.5-10.0g/10min, ethylene-vinyl acetate copolymer in which a melting flow index is 3.0-40.0g/10min, or other blend materials of above each copolymer; adding a crosslink agent, a foaming agent, and other additives to the base material to achieve a mixture; forming the mixture into a sheet form with a roll mill and cutting the sheet into a shape of a mold; heating the sheet at a temperature of 80-140deg.C and then a temperature of 100-170deg.C in the mold.

Description

신발중창의 간단한 제조 방법{Simple Method for Midsole}Simple Method for Midsole

본 발명이 속하는 기술 분야는 플라스틱 또는 가소성 상태에 있는 물질로 부터 특정 성형품을 제조하는 분야로서, 신발에 구성되는 부품으로서 신발중창을 제조하는 기술 분야이다. 종래의 EVA계 신발중창을 만드는 방법은 크게 나누어 두 가지가 있는데, 첫번째 방법은 EVA, 발포제, 가교제 그리고 기타 첨가제들을 가열 상태에서 기계적으로 혼합한 다음 볼 밀 (ball mill)을 통과시켜 얇은 시트로 만든다. 이 시트를 가열된 평판 프레스에 넣고 발포와 동시에 가교시켜 1차 발포된 평판 스폰지를 만든다. 이 평판 스폰지를 제작하고자 하는 신발중창 모형의 금형에 가장 근접한 형태로 절단한 다음에 미세한 부분은 그라인더(grinding)하여 금형의 모형에 가장 근접한 형태(95% 정도의 성형)로 만든다. 95% 정도로 발포 및 성형된 시료를 금형에 넣고, 이 금형을 가열된 프레스에서 2차 발포시킨다. 2차 발포 공정 후에 냉각수로 금형을 냉각시킨 다음에 금형에서 제품을 분리시킴으로서 100% 성형된 최종 제품의 신발중창을 얻게된다.두 번째 방법은 가열로에서 재료들을 용융 혼합한 다음, 사출기를 사용하여 원하는 모양으로 사출 성형 발포하는 방법이다. 현재 주로 사용되고 있는 방법인 평판 발포 후 2차로 금형 프레스를 이용하여 신발중창을 만드는 방법은 약 6단계의 제조공정을 거치기 때문에 제조원가가 많이 들고, 또 다른 방법인 사출 발포의 경우는 제조 공정단계를 3단계로서 자동화생산체제를 구축할 수 있는 등 기존의 생산 방식에 비하여 원가절감 효과를 얻을 수 있으나, 사출성형 자체의 고가 제조장비와 사출 성형 시 부피증가가 일어나서 미세한 부분에서 정교한 모양을 만들지 못하는 단점들이 있다. 그러나 주어진 금형 내에서 발포와 동시에 성형을 할 수 있는 본 기술의 개발은 제조공정을 2단계로 줄임으로서 상당한 원가절감을 이룩할 수 있을 뿐만 아니라 특별한 투자시설이 필요없다.TECHNICAL FIELD The present invention belongs to the field of manufacturing a specific molded article from a plastic or a material in a plastic state, and is a technical field of manufacturing a shoe sole as a component of a shoe. There are two general methods of making EVA-based shoe soles. The first method is to mechanically mix EVA, foaming agent, crosslinking agent and other additives under heating, and then pass through a ball mill to form a thin sheet. . The sheet is placed in a heated flat press and crosslinked simultaneously with foaming to produce a primary foamed flat sponge. The flat sponge is cut into the shape closest to the mold of the shoe sole model to be manufactured, and then the fine parts are ground to form the shape closest to the mold shape (about 95% of molding). Samples foamed and molded to about 95% are placed in a mold, and the mold is secondly foamed in a heated press. After the second foaming process, the mold is cooled with cooling water and then the product is separated from the mold to obtain a shoe sole of the 100% molded final product. The second method is to melt-mix the materials in a heating furnace and then use an injection machine to Injection molding of the desired shape. The method of making shoe soles by using a mold press after foaming a plate, which is the method currently used, takes a lot of manufacturing costs because it takes about 6 steps of manufacturing process, and in the case of injection foaming, another manufacturing process step is 3 Cost reduction effect can be achieved compared to the existing production method, such as the establishment of automated production system as a step, but the disadvantages of high-cost manufacturing equipment of injection molding itself and the increase of volume during injection molding can not make elaborate shapes in minute parts. have. However, the development of this technology, which can be molded simultaneously with foaming in a given mold, can achieve significant cost savings by reducing the manufacturing process to two stages and requires no special investment facility.

이 과제에서 개발하고자 하는 기술은 원하는 모양의 금형에 직접 EVA, 발포제, 가교제 그리고 기타 첨가제의 혼합 원료로 배합된 시트를 투입하여 발포와 동시에 성형할 수 있는 기술이다. 이 기술은 이 공정에 맞는 각종 원료의 최적배합 조성(컴파운딩 기술)과 금형의 개량 및 발포조건(발포온도 및 발포시간)의 최적화와 같은 요소 기술의 개발을 수행한 다음에 이 요소 기술들을 조합함으로서 가능하다. 본 발명은 원하는 모양의 신발중창 제작 금형에 에틸렌-비닐아세테이트 공중합체, 발포제, 가교제 그리고 기타 첨가제의 혼합물로 구성된 시트(sheet)를 투입하여 발포와 동시에 성형할 수 있는 방법에 관한 것으로서, 용융흐름지수가 서로 다른 두 종류의 에틸렌-비닐아세테이트 공중합체와 발포제 등이 균일하게 혼합된 평판 시트를 적당한 크기로 잘라서 금형에 직접 넣어 조절된 온도하에서 발포, 성형 제품을 제조하는 방법에 관한 것이다. 상세하게 설명하면, 우선 두 종류의 에틸렌-비닐아세테이트 공중합체와 첨가제들을 균일하게 혼합한 다음 다시 발포제와 경화제를 골고루 섞어 시트를 제조한다. 이 시트를 금형의 크기에 적당하게 맞추어 넣고 온도를 2 단계로 조절하면서 발포를 시키고 이와 동시에 금형의 크기에 맞게 성형하는 방법이다.The technology to be developed in this task is a technology capable of molding simultaneously with foaming by inserting a sheet blended with a mixed raw material of EVA, foaming agent, crosslinking agent and other additives directly into a mold of a desired shape. This technology combines these element technologies after the development of element technologies such as the optimum blending composition (compounding technology) of various raw materials for this process, improvement of mold and optimization of foaming conditions (foaming temperature and foaming time). By doing so. The present invention relates to a method that can be molded simultaneously with foaming by inserting a sheet composed of a mixture of ethylene-vinylacetate copolymer, foaming agent, crosslinking agent and other additives into a shoe sole manufacturing mold of a desired shape, the melt flow index The present invention relates to a method of manufacturing a foamed and molded product under a controlled temperature by cutting a flat sheet of two different types of ethylene-vinylacetate copolymer and a foaming agent uniformly mixed into a suitable size and directly inserting the same into a mold. In detail, first, two types of ethylene-vinylacetate copolymer and additives are uniformly mixed, and then a foaming agent and a curing agent are evenly mixed to prepare a sheet. The sheet is appropriately sized to the mold size and foamed while controlling the temperature in two stages. At the same time, the sheet is molded according to the mold size.

본 발명의 목적은 금형내에서 신발중창을 발포와 동시에 성형할 수 있는 방법을 제공하기 위한 것으로서, 용융흐름지수가 서로 다른 두 종류의 에틸렌-비닐아세테이트 공중합체, 특히 바람직하기는 용융흐름지수가 1.5 - 10.0 (g / 10 min)과 3.0 - 40.0 (g / 10 min) 범위의 두 종류의 에틸렌-비닐아세테이트 공중합체을 혼합하여 사용함으로서 발포제품의 모양을 금형의 형태로서 세밀하게 하는 것이다. 본 발명의 또 하나 목적은 발포 및 성형하는 온도를 2 단계로, 특히 좋기로는 1 단계로 80oC ~ 140oC 로 일정시간 유지하고 2 단계로 100oC ~ 170oC 로 일정시간 유지함으로서 발포 성능과 성형성을 높히는 것이다.SUMMARY OF THE INVENTION An object of the present invention is to provide a method for simultaneously molding a shoe sole in a mold, wherein two types of ethylene-vinylacetate copolymers having different melt flow indices, particularly preferably, melt melt index 1.5 -Mixing two types of ethylene-vinylacetate copolymers in the range of 10.0 (g / 10 min) and 3.0-40.0 (g / 10 min) allows the foamed product to be shaped in the form of a mold. Another object of the present invention is to maintain the temperature of foaming and molding in two steps, particularly preferably in one step at 80 o C ~ 140 o C for a certain time and in two steps 100 o C ~ 170 o C By increasing the foaming performance and formability.

본 발명은 원하는 모양의 신발중창 제작 금형에 에틸렌-비닐아세테이트 공중합체, 발포제, 가교제 그리고 기타 첨가제의 혼합물로 구성된 시트(sheet)를 투입하여 발포와 동시에 성형할 수 있는 방법에 관한 것으로서, 용융흐름지수가 서로 다른 두 종류의 에틸렌-비닐아세테이트 공중합체와 발포제 등이 균일하게 혼합된 평판 시트를 적당한 크기로 잘라서 금형에 직접 넣어 조절된 온도하에서 발포, 성형 제품을 제조하는 방법에 관한 것이다. 상세하게 설명하면, 용융흐름지수가 1.5 ~ 10.0 g / 10분인 에틸렌-비닐아세테이트 공중합체와 용융흐름지수가 3.0 ~ 40.0g / 10분인 에틸렌비닐아세테이트 공중합체 또는 이들 각각의 블렌드물을 기재로 하고 여기에 가교제, 발포제 및 기타 첨가제를 첨가한 배합물을 롤밀을 사용하여 시트 형태로 만든 후 금형 모양으로 재단하여 금형에 투입한다. 사용되는 에틸렌-비닐아세테이트 공중합체의 블렌드물은 비닐 아세테이트 함량 10 내지 30중량% 범위로서 용융흐름지수가 1.5 ~ 10.0 g / 10분인 에틸렌-비닐아세테이트 공중합체 97 ~ 40 중량부에 용융흐름지수가 3.0 ~ 40.0 g / 10분인 에틸렌비닐아세테이트 공중합체를 3 ~ 60 중량부 첨가하면 더욱 좋다. 이 시트를 금형의 크기에 적당하게 맞추어 넣고 온도를 2 단계로 조절하면서 발포를 시키고 이와 동시에 금형의 크기에 맞게 성형하는 방법이다. 특히 좋기로는 1 단계로 80oC ~ 140oC 로 10 ~ 60분간 유지하고 2 단계로 100oC ~ 170oC 로 10 ~ 60분간 유지함으로서 발포 성능과 성형성을 높히는 것이다. 발포 및 성형 완료 후에 합형상태에서 10℃ ~ 30℃ 정도의 저온에서 10 ~ 30 분간 냉각시켜 신발중창을 인출한다.The present invention relates to a method that can be molded simultaneously with foaming by inserting a sheet composed of a mixture of ethylene-vinylacetate copolymer, foaming agent, crosslinking agent and other additives into a shoe sole manufacturing mold of a desired shape, the melt flow index The present invention relates to a method of manufacturing a foamed and molded product under a controlled temperature by cutting a flat sheet of two different types of ethylene-vinylacetate copolymer and a foaming agent uniformly mixed into a suitable size and directly inserting the same into a mold. In detail, the ethylene-vinylacetate copolymer having a melt flow index of 1.5 to 10.0 g / 10 minutes and the ethylene vinyl acetate copolymer having a melt flow index of 3.0 to 40.0 g / 10 minutes or their respective blends are based on The crosslinking agent, foaming agent and other additives were added into the sheet using a roll mill, cut into a mold, and then put into a mold. The blend of ethylene-vinylacetate copolymer used has a vinyl acetate content in the range of 10 to 30% by weight, and a melt flow index of 97 to 40 parts by weight of the ethylene-vinylacetate copolymer having a melt flow index of 1.5 to 10.0 g / 10 min. 3 to 60 parts by weight of an ethylene vinyl acetate copolymer having a ˜40.0 g / 10 min. The sheet is appropriately sized to the mold size and foamed while controlling the temperature in two stages. At the same time, the sheet is molded according to the mold size. In particular, it is to increase the foaming performance and formability by maintaining 10 to 60 minutes at 80 o C ~ 140 o C in one step and 10 to 60 minutes at 100 o C ~ 170 o C in two stages. After foaming and molding are completed, the shoe sole is taken out by cooling for 10 to 30 minutes at a low temperature of about 10 ° C to 30 ° C in a molded state.

실시예 1Example 1

EVA (VA content = 26%, MI = 3.0) 90 phr, IR2200 10 phr, stearic acid 1 phr, magnesium carbonate 10 phr, zinc oxide 5 phr, titanium oxide 2 phr을 mixer에 넣고 균일하게 혼합한 다음, 이 혼합물을 롤밀에 옮겨 가교제 (dicumyl peroxide) 0.7 phr과 발포제 (AC-40) 4 phr을 균일하게 섞어면서 시트를 제조한다. 제조된 시트를 재단하여 금형에 넣고 125oC로 1시간 유지한 다음 다시 140oC로서 1시간 유지한다. 금형을 냉수로 냉각한 다음 신발중창을 인출한다.EVA (VA content = 26%, MI = 3.0) 90 phr, IR2200 10 phr, stearic acid 1 phr, magnesium carbonate 10 phr, zinc oxide 5 phr, titanium oxide 2 phr are mixed in a mixer and mixed uniformly The sheet was prepared by uniformly mixing 0.7 phr of a crosslinking agent (dicumyl peroxide) and 4 phr of a blowing agent (AC-40). The prepared sheet is cut into a mold and kept at 125 ° C. for 1 hour, and then maintained at 140 ° C. for 1 hour. Cool the mold with cold water and then take out the shoe sole.

실시예 2Example 2

EVA (VA content = 26%, MI = 3.0) 70 phr, EVA (VA content = 28%, MI = 25.0) 20 phr, IR2200 10 phr, stearic acid 1 phr, magnesium carbonate 10 phr, zinc oxide 5 phr, titanium oxide 2 phr을 mixer에 넣고 균일하게 혼합한 다음, 이 혼합물을 롤밀에 옮겨 가교제 (dicumyl peroxide) 0.7 phr과 발포제 (AC-40) 4 phr을 균일하게 섞어면서 시트를 제조한다. 제조된 시트를 재단하여 금형에 넣고 125oC로 1시간 유지한 다음 다시 140oC로서 1시간 유지한다. 금형을 냉수로 냉각한 다음 신발중창을 인출한다.EVA (VA content = 26%, MI = 3.0) 70 phr, EVA (VA content = 28%, MI = 25.0) 20 phr, IR2200 10 phr, stearic acid 1 phr, magnesium carbonate 10 phr, zinc oxide 5 phr, titanium After putting 2 phr of oxide into the mixer and mixing uniformly, the mixture was transferred to a roll mill to prepare a sheet by uniformly mixing 0.7 phr of a crosslinking agent (dicumyl peroxide) and 4 phr of a blowing agent (AC-40). The prepared sheet is cut into a mold and kept at 125 ° C. for 1 hour, and then maintained at 140 ° C. for 1 hour. Cool the mold with cold water and then take out the shoe sole.

용융흐름지수가 서로 다른 에틸렌-비닐아세테이트 공중합체와 첨가제들이 혼합된 시트를 금형에 넣어 온도를 2 단계로 조절하면서 발포를 시키고 이와 동시에 금형의 크기에 맞게 성형하는 방법으로서 성형성이 우수하고, 제조공정을 간단하게 줄임으로서 상당한 원가절감을 이룩할 수 있을 뿐만 아니라 특별한 투자시설을 필요로 하지 않는다.Equipped with a sheet of ethylene-vinylacetate copolymer and additives with different melt flow indices into a mold, foaming while controlling the temperature in two stages, and at the same time molding to fit the mold size, excellent moldability, manufacturing Simply reducing the process can result in significant cost savings and does not require special investment facilities.

Claims (1)

1. 용융흐름지수가 1.5 ~ 10.0 g / 10분인 에틸렌-비닐아세테이트 공중합체와 용융흐름지수가 3.0 ~ 40.0 g / 10분인 에틸렌비닐아세테이트 공중합체 또는 이들 각각의 블렌드물을 기재로 하고 여기에 가교제, 발포제 및 기타 첨가제를 첨가한 배합물을 롤밀을 사용하여 시트 형태로 만든 후 금형 모양으로 재단하여 금형에 투입하고 80℃ ~ 140℃ 와 100℃ ~ 170℃의 2 단계 열처리로서 발포와 동시에 성형하는 것을 특징으로 하는 신발 중창의 제조방법.1.Based on an ethylene-vinylacetate copolymer having a melt flow index of 1.5 to 10.0 g / 10 minutes and an ethylene vinyl acetate copolymer having a melt flow index of 3.0 to 40.0 g / 10 minutes or a blend thereof, wherein the crosslinking agent, The mixture containing the blowing agent and other additives is made into a sheet using a roll mill, cut into molds, put into a mold, and molded simultaneously with foaming as a two-step heat treatment at 80 ° C to 140 ° C and 100 ° C to 170 ° C. Method of manufacturing a shoe midsole. 2. 제1항에 있어서, 에틸렌-비닐아세테이트 공중합체는 비닐 아세테이트 함량 10 내지 30중량% 범위의 공중합체인 제조 방법.2. The process according to 1, wherein the ethylene-vinylacetate copolymer is a copolymer having a vinyl acetate content in the range of 10 to 30% by weight. 3. 제1항에 있어서, 상기 에틸렌-비닐아세테이트 공중합체 블렌드물은 용융흐름지수가 1.5 ~ 10.0 g / 10분인 에틸렌-비닐아세테이트 공중합체 97 ~ 40 중량부에 용융흐름지수가 3.0 ~ 40.0 g / 10분인 에틸렌비닐아세테이트 공중합체 3 ~ 60 중량부 첨가하여 블렌드한 것임을 특징으로 하는 신발중창의 제조 방법.3. The ethylene-vinylacetate copolymer blend according to item 1, wherein the melt flow index is from 3.0 to 40.0 parts by weight of 97 to 40 parts by weight of the ethylene-vinylacetate copolymer having a melt flow index of 1.5 to 10.0 g / 10 min. Method of producing a shoe sole, characterized in that blended by adding 3 to 60 parts by weight of ethylene vinyl acetate copolymer which is 10 minutes. 4. 제1항에 있어서, 열처리 공정이 80℃ ~ 140℃에서 10 ~ 60분간 처리하고 계속하여 2 단계로 100℃ ~ 170℃에서 10 ~ 60분간 처리하는 공정을 특징으로 하는 신발중창의 제조방법.4. The method of claim 1, wherein the heat treatment process is a step of treating 10 to 60 minutes at 80 ° C. to 140 ° C., followed by 10 to 60 minutes at 100 ° C. to 170 ° C. in two steps. . 5. 제1항에 있어서, 발포 및 성형 완료 후에 합형상태에서 10℃ ~ 30℃ 정도의 저온에서 10 ~ 30 분간 냉각시켜 인출하는 것을 특징으로 하는 신발중창의 제조 방법.5. The method for producing a shoe sole according to claim 1, wherein after the completion of foaming and molding, the mixture is cooled and drawn out at a low temperature of about 10 ° C to 30 ° C for 10 to 30 minutes in a molded state.
KR1020010027606A 2001-05-21 2001-05-21 Simple Method for Midsole KR20020088727A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030073086A (en) * 2002-03-08 2003-09-19 박호삼 EVA polymer comprising charcoal and method to manufacture the said EVA polymer
KR100468431B1 (en) * 2001-10-25 2005-01-27 한국신발피혁연구소 Manufacturing method of outsole or midsole for sports shoes
KR100729234B1 (en) * 2006-04-03 2007-06-15 삼성토탈 주식회사 Resin composition with excellent floor impact sound insulation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100468431B1 (en) * 2001-10-25 2005-01-27 한국신발피혁연구소 Manufacturing method of outsole or midsole for sports shoes
KR20030073086A (en) * 2002-03-08 2003-09-19 박호삼 EVA polymer comprising charcoal and method to manufacture the said EVA polymer
KR100729234B1 (en) * 2006-04-03 2007-06-15 삼성토탈 주식회사 Resin composition with excellent floor impact sound insulation

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