KR20060129554A - Conductive silicon impregnant, conductive silicon impregnated polyurethane sponge, and manufacturing methods thereof - Google Patents

Conductive silicon impregnant, conductive silicon impregnated polyurethane sponge, and manufacturing methods thereof Download PDF

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KR20060129554A
KR20060129554A KR1020050048156A KR20050048156A KR20060129554A KR 20060129554 A KR20060129554 A KR 20060129554A KR 1020050048156 A KR1020050048156 A KR 1020050048156A KR 20050048156 A KR20050048156 A KR 20050048156A KR 20060129554 A KR20060129554 A KR 20060129554A
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conductive
phr
polyurethane sponge
mixing
mixture
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KR1020050048156A
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Korean (ko)
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박형근
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주식회사 웨이브솔루션
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20Conductive material dispersed in non-conductive organic material
    • H01B1/24Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/04Carbon
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/04Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04Polyurethanes

Abstract

Provided is a conductive silicon impregnant solution, which exhibits good conductivity, is stable against friction or shock, and has lower resistance value than conventional impregnant solutions. The conductive silicon impregnant solution is manufactured by the steps of: (1) adding an organic solvent 250-340phr to 100 parts by weight of a silicon polymer and mixing the admixture to thoroughly disperse the silicon polymer in the organic solvent; (2) adding a conductive solution 2-7phr to the mixture of the step (1) to be mixed; and (3) adding conductive carbon 15-25phr to the mixture of the step (2) to be mixed.

Description

도전성 실리콘 함침액과 이 함침액이 함침된 폴리우레탄 스펀지 및 이들의 제조방법 {Conductive Silicon Impregnant, Conductive Silicon Impregnated Polyurethane Sponge, and Manufacturing Methods Thereof}Conductive Silicon Impregnant, Polyurethane Sponge Impregnated with Impregnated Liquid and Manufacturing Method Thereof {Conductive Silicon Impregnant, Conductive Silicon Impregnated Polyurethane Sponge, and Manufacturing Methods Thereof}

도 1 : 본 발명에 따른 폴리우레탄 스펀지의 제조 공정도1 is a process chart of manufacturing a polyurethane sponge according to the present invention

본 발명은 도전성 실리콘 함침액과 이를 이용하여 제조된 폴리우레탄 스펀지에 관한 것으로서, 보다 상세하게는, 레이저 프린터의 토너공급용 롤러나 전자제품의 실드용 가스켓 또는 전자파 차폐 완충소재 등과 같이 도전성이 요구되는 각종 부품에 적용이 가능한 도전성 실리콘 함침액과 이러한 도전성 실리콘 함침액을 함침시킨 폴리우레탄 스펀지 및 이들의 제조방법에 관한 발명이다.The present invention relates to a conductive silicon impregnation liquid and a polyurethane sponge manufactured using the same. More specifically, the conductive silicone impregnation liquid is required to have conductivity such as a roller for toner supply of a laser printer, a shielding gasket for an electronic product, or an electromagnetic shielding buffer material. The present invention relates to a conductive silicone impregnation liquid applicable to various components, a polyurethane sponge impregnated with such a conductive silicone impregnation liquid, and a method of manufacturing the same.

우레탄 고분자 화합물의 다공성 구조로 이루어진 폴리우레탄 스펀지에 도전물질을 함침시켜 도전성(conductivity)을 부여한 도전성 폴리우레탄 스펀지는, 레 이저 프린터에서 토너를 OPC 드럼에 전달하여 잠상 이미지가 OPC 드럼의 표면에 나타나도록 하는 토너공급용 롤러(즉, 현상롤러)에 사용되고 있으며, 그 밖에도 전자파ㆍ정전기 방지용 쿠션이나 PCB 카드 또는 케이스의 실딩 부재 등 각종 전자제품의 부품으로 널리 사용되고 있다.Conductive polyurethane sponge impregnated with a conductive material in a polyurethane sponge made of a porous structure of a urethane polymer compound to impart conductivity, so that a latent image is displayed on the surface of the OPC drum by delivering toner to the OPC drum in a laser printer. It is used in toner supply rollers (i.e. developing rollers), and is also widely used in various electronic products such as electromagnetic wave and antistatic cushions and shielding members of PCB cards or cases.

그런데, 종래의 도전성 폴리우레탄 스펀지는 소정의 도전성 함침액을 함침(含浸)시켜 제조되는데, 물리적 특성이나 제조공정 등에서 다음과 같은 문제점을 갖고 있다.By the way, although the conventional conductive polyurethane sponge is manufactured by impregnating a predetermined | prescribed conductive impregnation liquid, it has the following problems in a physical characteristic, a manufacturing process, etc.

첫째, 전기전도도와 관련하여, 전기저항이 대략 109∼1011Ω으로서, 저항값이 높고 범위가 좁으며, 측정 위치에 따라 전기전도도가 균일하지 못하고 불안정한 양상을 나타내고 있다.First, with respect to the electrical conductivity, the electrical resistance is approximately 10 9 to 10 11 kPa, the resistance value is high and the range is narrow, and the electrical conductivity is not uniform and unstable depending on the measurement position.

둘째, 함침 부분이 마찰이나 충격에 의해 쉽게 떨어져 나가기 때문에, 도전성 폴리우레탄 스펀지 제품 자체의 안정성이 낮고, 스펀지 주위의 부품에 대한 2차 오염성이 큰 문제가 있다.Second, since the impregnated portion is easily pulled out by friction or impact, the stability of the conductive polyurethane sponge product itself is low, and there is a problem in that secondary contamination on components around the sponge is large.

셋째, 압축성 및 탄성이 낮아 복원력이 떨어지는 문제가 있다.Third, there is a problem that the restoring force is lowered because the compressibility and elasticity is low.

넷째, 제조공정에서 도전성 카본의 분산이 원활하게 이루어지지 않아 공정 수행에 곤란함이 있고, 도전성 카본의 편중 현상으로 인해 함침 공정에서 불량률이 높은 문제가 있다.Fourth, there is a difficulty in performing the process because the dispersion of the conductive carbon is not smoothly made in the manufacturing process, there is a problem that the defect rate is high in the impregnation process due to the biased phenomenon of the conductive carbon.

다섯째, 2차 가공시 제품의 변형으로 인해 가공 자체가 쉽지 않은 문제가 있다.Fifth, there is a problem that the processing itself is not easy due to the deformation of the product during the secondary processing.

본 발명은 전술한 바와 같은 종래의 문제점을 개선하기 위해 안출된 것으로서, 그 목적은, 도전성이 양호하고 마찰이나 충격에 안정적인 도전성 실리콘 함침액을 제공함과 아울러, 제조 및 가공이 용이한 도전성 실리콘이 함침된 폴리우레탄 스펀지 및 이들의 제조방법을 제공하는 데에 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. The object of the present invention is to provide a conductive silicon impregnation solution having good conductivity and stable to friction and impact, and also being impregnated with conductive silicon that is easy to manufacture and process. To provide a polyurethane sponge and a method for producing the same.

위와 같은 목적을 달성하기 위한 본 발명의 기술적 수단은 다음과 같이 구성된다.Technical means of the present invention for achieving the above object is configured as follows.

먼저, 본 발명의 도전성 실리콘 함침액은, 실리콘 폴리머 100중량부에 대해, 유기용제 250∼340phr, 도전액 2∼7phr, 도전성 카본 15∼25phr이 첨가되어 이루어진다.First, the conductive silicone impregnation liquid of the present invention is formed by adding 250 to 340 phr of an organic solvent, 2 to 7 phr of a conductive liquid, and 15 to 25 phr of conductive carbon to 100 parts by weight of the silicone polymer.

그리고, 본 발명에 따른 도전성 실리콘 함침액의 제조방법은, 실리콘 폴리머 100중량부에 대해 유기용제 250∼340phr을 투입하여 상기 실리콘 폴리머가 상기 유기용제에 완전 분산되도록 혼합하는 제1공정; 상기 제1공정의 혼합물에 도전액 2∼7phr을 투입하여 혼합하는 제2공정; 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합하는 제3공정을 포함하여 이루어진다. 여기서, 상기 제3공정에서 투입되는 도전성 카본은 분할되어 투입이 이루어지며, 이 때 먼저 투입된 도전성 카본이 완전 분산된 이후에 나머지 도전성 카본을 투입하는 것이 바람직하다. 또한, 상기 제3공정 이후에 상기 제3공정의 혼합물을 칭량하여 증발된 유 기용제의 양을 보충하는 공정이 더 포함될 수도 있다.In addition, the method for producing a conductive silicon impregnation liquid according to the present invention comprises: a first step of mixing 250 to 340 phr of an organic solvent with respect to 100 parts by weight of a silicone polymer and mixing the silicone polymer to be completely dispersed in the organic solvent; A second step of mixing 2-7 phr of a conductive solution into the mixture of the first step; And a third step of adding 15-25 phr of conductive carbon to the mixture of the second step and mixing the same. Here, the conductive carbon to be added in the third step is divided into the input is made, at this time, it is preferable to add the remaining conductive carbon after the first conductive carbon is completely dispersed. In addition, after the third step may further include a step of replenishing the amount of the organic solvent evaporated by weighing the mixture of the third step.

다음으로, 본 발명의 폴리우레탄 스펀지는, 상기 도전성 실리콘 함침액이 경화제 2∼7phr과 함께 함침되어 도전성을 갖게 된다.Next, the polyurethane sponge of the present invention is impregnated with the conductive silicone impregnation liquid with a curing agent of 2 to 7 phr to have conductivity.

그리고, 본 발명에 따른 폴리우레탄 스펀지의 제조방법은, 실리콘 폴리머 100중량부에 대해 유기용제 250∼340phr을 투입하여 상기 실리콘 폴리머가 상기 유기용제에 완전 분산되도록 혼합하는 제1공정; 상기 제1공정의 혼합물에 도전액 2∼7phr을 투입하여 혼합하는 제2공정; 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합하는 제3공정; 상기 제3공정의 혼합물에 경화제 2∼7phr을 투입하여 혼합하는 제4공정; 상기 제4공정의 혼합물에 폴리우레탄 스펀지를 투여하는 제5공정; 상기 제5공정을 거친 폴리우레탄 스펀지를 건조시키는 제6공정을 포함하여 이루어진다.In addition, a method for producing a polyurethane sponge according to the present invention, the first step of mixing so that the silicone polymer is completely dispersed in the organic solvent by adding 250 to 340 phr of an organic solvent to 100 parts by weight of the silicone polymer; A second step of mixing 2-7 phr of a conductive solution into the mixture of the first step; A third step of mixing 15-25 phr of conductive carbon into the mixture of the second step; A fourth step of mixing 2-7 phr of a curing agent to the mixture of the third step; A fifth step of administering a polyurethane sponge to the mixture of the fourth step; And a sixth step of drying the polyurethane sponge which has passed through the fifth step.

이하에서는 본 발명의 기술적 구성에 대하여 구체적으로 설명한다.Hereinafter, the technical configuration of the present invention will be described in detail.

먼저, 본 발명에 따른 도전성 실리콘 함침액은, 실리콘 폴리머 100중량부에 대해, 유기용제 250∼340phr, 도전액(conductive electro-solution) 2∼7phr, 도전성 카본(conductive carbon) 15∼25phr이 첨가되어 이루어진 구성을 갖는다.First, in the conductive silicon impregnation liquid according to the present invention, 250 to 340 phr of an organic solvent, 2 to 7 phr of a conductive electro-solution, and 15 to 25 phr of conductive carbon are added to 100 parts by weight of the silicone polymer. Has a configured configuration.

여기서, 상기 실리콘 폴리머는, 예를 들어 본 발명의 함침액이 폴리우레탄 스펀지에 적용되었을 때 도전성 카본과 도전액의 고형분이 폴리우레탄 스펀지의 셀 벽과 막에 접착되도록 하는 바인더의 역할을 한다. 또한, 실리콘 폴리머는 폴 리우레탄 스펀지에 적용되었을 때 기존의 실리콘 스펀지와 동등한 탄성 복원력을 나타낸다.Here, the silicone polymer serves as a binder to allow the solid content of the conductive carbon and the conductive liquid to adhere to the cell walls and the membrane of the polyurethane sponge, for example, when the impregnation solution of the present invention is applied to the polyurethane sponge. In addition, the silicone polymer exhibits elastic resilience equivalent to that of a conventional silicone sponge when applied to a polyurethane sponge.

상기 유기용제는 실리콘 폴리머의 자체 점도를 낮추어 유동을 좋게 함으로써 실리콘 폴리머가 폴리우레탄 스펀지에 용이하게 침투하도록 하는 역할을 하며, 벤젠이나 톨루엔 또는 크실렌 용제가 적용된다. 이러한 유기용제는 도전성 카본의 함량이 증가하는 경우에 점도의 상승을 방지하는 기능도 하게 되며, 함침 공정에서 증발하여 폴리우레탄 스펀지 내의 함침도를 균일하게 유지시키는 데에 일조한다. 실리콘 폴리머에 대한 유기용제의 함량이 상기 범위보다 낮을 경우에는 실리콘 폴리머의 유동성을 충분히 확보할 수 없게 되고, 높을 경우에는 실리콘 폴리머의 형상 유지를 저해하므로, 250∼340phr 범위가 적당하다.The organic solvent serves to facilitate the penetration of the silicone polymer into the polyurethane sponge by lowering the viscosity of the silicone polymer to improve flow, and a benzene, toluene or xylene solvent is applied. Such an organic solvent also serves to prevent an increase in viscosity when the content of the conductive carbon increases, and helps to maintain the degree of impregnation in the polyurethane sponge uniformly by evaporation in the impregnation process. When the content of the organic solvent in the silicone polymer is lower than the above range, the fluidity of the silicone polymer cannot be sufficiently secured, and when the content of the organic solvent is high, the shape maintenance of the silicone polymer is inhibited, so the range of 250 to 340 phr is appropriate.

상기 도전액은 양이온의 특성을 갖는 고형물의 용액으로서, 실리콘 폴리머의 전기적 특성인 저항값을 낮추어주며, 도전성 카본의 전기전도도를 상승시키는 역할을 한다. 상기 첨가 범위를 벗어나는 경우, 실리콘 폴리머의 전기전도도를 적정 수준으로 유지할 수 없게 되므로 2∼7phr 범위가 적당하다.The conductive liquid is a solution of a solid having a cation characteristic, and lowers the resistance value, which is an electrical characteristic of the silicone polymer, and serves to increase the electrical conductivity of the conductive carbon. If it is out of the addition range, since the electrical conductivity of the silicone polymer cannot be maintained at an appropriate level, the range of 2 to 7 phr is appropriate.

상기 도전성 카본은 실리콘 폴리머의 전기전도도를 상승시켜 함량에 따라 전기 저항값을 조절할 수 있게 하는데, 실리콘 폴리머 및 폴리우레탄 스펀지의 보강체 역할도 한다. 첨가 범위가 15∼25phr를 벗어나게 되면, 실리콘 폴리머의 전기전도도를 적정 수준으로 할 수 없게 되므로 상기 범위를 유지하여야 한다.The conductive carbon increases the electrical conductivity of the silicone polymer to adjust the electrical resistance value according to the content, and also serves as a reinforcement of the silicone polymer and the polyurethane sponge. If the addition range is 15 to 25 phr, the electrical conductivity of the silicone polymer may not be at an appropriate level, so the above range should be maintained.

본 발명에 따른 도전성 실리콘 함침액의 제조방법에 대한 실시예를 설명하면 다음과 같다.Referring to the embodiment of the method for producing a conductive silicon impregnation liquid according to the present invention.

먼저, 실리콘 폴리머 100중량부에 대해 유기용제 250∼340phr을 투입하여 상기 실리콘 폴리머가 상기 유기용제에 완전 분산되도록 혼합한다(제1공정).First, 250 to 340 phr of an organic solvent is added to 100 parts by weight of the silicone polymer and mixed so that the silicone polymer is completely dispersed in the organic solvent (first step).

이어서, 상기 제1공정의 혼합물에 도전액 2∼7phr을 투입하여 혼합한다(제2공정).Subsequently, 2-7 phr of electroconductive solution is thrown into the mixture of the said 1st process, and it mixes (2nd process).

다음으로, 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합한다(제3공정).Next, 15-25 phr of conductive carbon is thrown into the mixture of the said 2nd process, and it mixes (3rd process).

그런데, 상기 제3공정에서 투입되는 도전성 카본은 실리콘 폴리머에 비해 비중이 현저히 낮기 때문에 실리콘 폴리머의 유동성을 저하시키고 점도를 상승시키게 되므로, 도전성 카본이 실리콘 폴리머와 충분한 혼합이 이루어지도록 하기 위해서는 분할 투입하는 것이 바람직하다. 예를 들어 8∼15 등분하여 분할 투입하되, 먼저 투입된 도전성 카본이 완전 분산된 이후에 나머지 도전성 카본을 투입하는 것이 좋다.However, since the specific gravity of the conductive carbon introduced in the third process is significantly lower than that of the silicone polymer, the fluidity of the silicone polymer is lowered and the viscosity is increased, so that the conductive carbon is divided and added to ensure sufficient mixing with the silicone polymer. It is preferable. For example, the mixture is divided into 8 to 15 parts, and the remaining conductive carbon is preferably added after the first conductive carbon is completely dispersed.

또, 상기 유기용제는 휘발성이 있으므로 공정 수행중에 유기용제의 손실이 발생하게 된다. 따라서, 제3공정 이후에 상기 제3공정의 혼합물을 칭량하여 증발된 유기용제의 양을 보충하는 것이 바람직하다.In addition, since the organic solvent is volatile, loss of the organic solvent occurs during the process. Therefore, it is preferable to replenish the amount of the evaporated organic solvent by weighing the mixture of the third step after the third step.

이렇게 제조된 도전성 실리콘 함침액은 화학적 안정을 유지하고 손실을 방지하기 위해 폴리에틸렌 용기에 담아서 보관하도록 한다.The conductive silicon impregnation solution thus prepared is stored in a polyethylene container to maintain chemical stability and prevent loss.

한편, 본 발명에 따른 도전성 폴리우레탄 스펀지는, 위와 같은 구성으로 이 루어진 도전성 실리콘 함침액에 폴리우레탄 스펀지를 투여하여 상기 함침액이 폴리우레탄 스펀지에 함침되도록 함으로써 만들어지는데, 특히 상기 함침액에 경화제 2∼7phr을 첨가하여야 한다. 즉, 경화제는 실리콘 폴리머의 가교제(cross-linking agent)로 작용하는 성분으로서, 첨가 함량이 2∼7phr 보다 낮거나 높은 경우에는 실리콘 폴리머의 화학적 안정성을 저해하므로 상기 첨가 범위로 유지하는 것이 바람직하다.On the other hand, the conductive polyurethane sponge according to the present invention is made by administering a polyurethane sponge to the conductive silicone impregnation liquid composed of the above configuration, such that the impregnation liquid is impregnated into the polyurethane sponge, in particular the hardening agent 2 to 7 phr should be added. That is, the curing agent is a component that acts as a cross-linking agent of the silicone polymer, and when the addition content is lower than or higher than 2 to 7 phr, the chemical stability of the silicone polymer is inhibited.

다음에서는, 본 발명에 따른 도전성 폴리우레탄 스펀지의 제조방법을 설명한다.Next, the manufacturing method of the conductive polyurethane sponge which concerns on this invention is demonstrated.

먼저, 도전성 실리콘 함침액을 구성하는 재료들인 실리콘 폴리머와 유기용제, 도전액 및 도전성 카본을 필요량 만큼 준비하여 계량한다.First, a silicon polymer, an organic solvent, a conductive liquid, and conductive carbon, which are materials constituting the conductive silicon impregnation liquid, are prepared and measured as necessary.

그리고, 계량된 실리콘 폴리머를 고점도 균질 믹서기에 넣은 후, 여기에 유기용제를 투입하여 약 15분간 혼합한다. 이 때, 유기용제의 첨가량은 실리콘 폴리머 100중량부에 대해 250∼340phr이 투입되며, 혼합과정에서 실리콘 폴리머가 유기용제에 완전 분산되도록 한다(제1공정).Then, the weighed silicone polymer is placed in a high viscosity homogeneous mixer, and then an organic solvent is added thereto and mixed for about 15 minutes. In this case, the amount of the organic solvent added is 250 to 340 phr per 100 parts by weight of the silicone polymer, so that the silicone polymer is completely dispersed in the organic solvent during the mixing process (first step).

이어서, 실리콘 폴리머와 유기용제의 혼합물에 도전액 2∼7phr을 투입하여 약 10분간 혼합한다(제2공정).Subsequently, 2-7 phr of the conductive solution is added to the mixture of the silicone polymer and the organic solvent and mixed for about 10 minutes (second step).

그리고, 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합한다(제3공정). 이 때, 도전성 카본의 총량을 대략 8∼15 등분하여, 이 중 먼저 투입된 양이 완전히 분산된 이후에 나머지 도전성 카본을 투입하도록 함으로써 혼 합이 완전하게 이루어지도록 한다. 이렇게 약 30분간 혼합한 다음, 이 혼합물을 칭량하여 증발된 유기용제의 양을 보충한다. 이와 같이 일단 완성된 함침액을 보관할 경우에는 폴리에틸렌 용기에 담아서 보관한다.And 15-25 phr of conductive carbon is thrown into the mixture of the said 2nd process, and it mixes (3rd process). At this time, the total amount of the conductive carbon is divided into approximately 8 to 15 equal parts, and the remaining amount of the conductive carbon is introduced after the first amount of the conductive carbon is completely dispersed so that the mixing is completed. After mixing for about 30 minutes, the mixture is weighed to replenish the amount of evaporated organic solvent. In this way, once the completed impregnation solution is stored in a polyethylene container.

다음으로, 상기 보관된 함침액을 폴리우레탄 스펀지에 함침시키기 위해서는, 상기 제3공정의 혼합물에 경화제 2∼7phr을 투입하여 약 5분간 완전 혼합이 이루어지도록 한다(제4공정).Next, in order to impregnate the stored impregnation solution with a polyurethane sponge, 2-7 phr of a curing agent is added to the mixture of the third step so that the mixing is completed for about 5 minutes (fourth step).

위와 같이 형성된 함침액을 함침기로 운반하여 함침액 수조에 넣은 뒤, 폴리우레탄 스펀지를 투여하고 함침기를 작동시켜 폴리우레탄 스펀지에 함침액이 함침되도록 한다(제5공정).The impregnating liquid formed as described above is transferred to the impregnator and placed in the impregnation bath, and then the polyurethane sponge is administered and the impregnator is operated to impregnate the impregnating solution into the polyurethane sponge (the fifth step).

그리고, 폴리우레탄 스펀지 내의 잔여 함침 용액을 제거한 뒤, 약 110℃의 오븐에서 약 20분간 건조시킨다(제6공정).Then, the residual impregnation solution in the polyurethane sponge is removed and then dried in an oven at about 110 ° C. for about 20 minutes (sixth step).

상기와 같이 건조된 폴리우레탄 스펀지는 수요처의 용도에 맞게 재단하거나 롤가공 또는 성형 등의 2차 가공을 한다.The polyurethane sponge dried as described above is subjected to secondary processing such as cutting or roll processing or molding according to the use of the customer.

다음은 전술한 바와 같은 본 발명의 도전성 실리콘 함침액이 함침된 폴리우레탄 스펀지의 물리적 특성에 대해 설명한다.The following describes the physical properties of the polyurethane sponge impregnated with the conductive silicon impregnation liquid of the present invention as described above.

먼저, 본 발명에 따른 도전성 실리콘 함침액의 저항값을 시험하여 본 결과, 103∼109Ω을 나타내었는데, 이는 종래의 도전성 함침액이 109∼1011Ω의 저항값을 나타내고 있는 것과 비교하여 볼 때, 본 발명의 함침액이 함침된 폴리우레탄 스펀지가 정전기 대책용으로 적합하고, 토너공급용 부품에 적용하였을 때 소모전력이 낮아서 경제성이 우수하다는 것을 알 수 있다.First, as a result of testing the resistance value of the conductive silicon impregnation liquid according to the present invention, it was 10 3 ~ 10 9 Ω, which is compared with the conventional conductive impregnation liquid exhibits a resistance value of 10 9 ~ 10 11 Ω In view of this, it can be seen that the polyurethane sponge impregnated with the impregnation solution of the present invention is suitable for antistatic measures, and when applied to a component for toner supply, the power consumption is low and the economy is excellent.

그리고, 폴리우레탄 스펀지에 함침된 도전성 실리콘 함침 성분이 마찰과 충격에도 잘 박리되지 않기 때문에 타 부품에 대한 오염의 우려가 적고 제품의 안정성이 우수하여 정밀 전자제품 등에 적용이 유리하다.In addition, since the conductive silicone impregnated component impregnated with the polyurethane sponge is not easily peeled off even under friction and impact, there is little fear of contamination on other components and the stability of the product is excellent, and thus it is advantageous to be applied to precision electronic products.

또, 실리콘 고유의 물성인 압축성과 반발력 및 탄성이 우수하므로, 장기간 사용에도 불구하고 스펀지 특유의 물성을 유지할 수 있으며, 실리콘 단독 성분으로 이루어진 고가의 제품을 대체할 수가 있다.In addition, since silicone has excellent properties of compressibility, repulsion, and elasticity, it is possible to maintain sponge-specific properties in spite of long-term use, and replace expensive products made of silicone alone.

또한, 실리콘 자체의 분산제적 역할로 인해 카본 등의 분산이 용이하며, 함침 공정에서 침강이 거의 발생하지 않아 공정 수행이 원활하게 이루어질 수가 있다.In addition, due to the role of dispersant of the silicon itself, it is easy to disperse carbon and the like, and sedimentation hardly occurs in the impregnation process, so that the process may be performed smoothly.

한편, 본 발명의 도전성 실리콘 함침액 자체를 단독 제품으로 하여, 폴리우레탄 스펀지 뿐만 아니라 전자제품의 실드용 가스켓 또는 전자파 차폐 완충소재 등과 같이 도전성이 요구되는 각종 부품에 두루 적용이 가능하다.On the other hand, using the conductive silicone impregnation liquid of the present invention as a single product, it can be applied to various components requiring conductivity, such as shielding gaskets or electromagnetic shielding buffer materials of electronic products as well as polyurethane sponges.

이상에서 설명한 바와 같이, 본 발명에 따른 도전성 실리콘 함침액은 도전성이 양호하고 마찰이나 충격에 안정적이어서 폴리우레탄 스펀지 등에 적용되었을 때 주위 부품에 대한 2차 오염 없이 반영구적으로 사용이 가능하며, 종래 함침액에 비해 저항값이 낮으므로 소모전력이 낮아 경제성이 우수한 효과가 있다.As described above, the conductive silicon impregnation liquid according to the present invention has good conductivity and is stable to friction or impact, so that when applied to a polyurethane sponge or the like, it can be used semi-permanently without secondary pollution to surrounding parts. Compared with the low resistance value, the power consumption is low and economical effect is excellent.

또한, 본 발명에 따른 폴리우레탄 스펀지는 상기와 같은 도전성 실리콘 함침 액이 함침됨으로 인해 압축성 및 탄성 복원력이 우수하여, 폴리우레탄 스펀지의 재단이나 롤가공 또는 성형시에 제품의 변형이 없이 가공이 용이한 장점이 있으며, 본 발명의 폴리우레탄 스펀지가 적용된 레이저 프린터의 토너공급용 롤러 또는 전자파 차폐 완충소재 등의 제품 성능을 향상시키는 효과가 있다.In addition, the polyurethane sponge according to the present invention is excellent in compressibility and elastic restoring force due to the impregnation of the conductive silicone impregnation liquid, it is easy to process without deformation of the product during cutting or roll processing or molding the polyurethane sponge There is an advantage, there is an effect to improve the product performance, such as toner supply roller or electromagnetic shielding buffer material of the laser printer to which the polyurethane sponge of the present invention is applied.

또, 본 발명에 따른 도전성 실리콘 함침액 또는 폴리우레탄 스펀지의 제조 공정에서 도전성 카본의 분산이 원활하게 이루어지므로 공정 수행이 용이하고 함침 공정에서의 불량률이 현저히 낮은 장점이 있다.In addition, since the conductive carbon is smoothly dispersed in the manufacturing process of the conductive silicon impregnation liquid or the polyurethane sponge according to the present invention, the process is easy to perform and the defect rate in the impregnation process is remarkably low.

Claims (6)

실리콘 폴리머 100중량부에 대해, 유기용제 250∼340phr, 도전액 2∼7phr, 도전성 카본 15∼25phr이 첨가되어 이루어진 도전성 실리콘 함침액.The conductive silicone impregnation liquid in which 250-340 phr of organic solvents, 2-7 phr of conductive liquids, and 15-25 phr of conductive carbon are added with respect to 100 weight part of silicone polymers. 실리콘 폴리머 100중량부에 대해 유기용제 250∼340phr을 투입하여 상기 실리콘 폴리머가 상기 유기용제에 완전 분산되도록 혼합하는 제1공정;A first step of mixing 250 to 340 phr of an organic solvent with respect to 100 parts by weight of a silicone polymer and mixing the silicone polymer to be completely dispersed in the organic solvent; 상기 제1공정의 혼합물에 도전액 2∼7phr을 투입하여 혼합하는 제2공정;A second step of mixing 2-7 phr of a conductive solution into the mixture of the first step; 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합하는 제3공정을 포함하여 이루어진 도전성 실리콘 함침액의 제조방법.And a third step of adding 15-25 phr of conductive carbon to the mixture of the second step, followed by mixing. 제2항에 있어서,The method of claim 2, 상기 제3공정에서 투입되는 도전성 카본은 분할되어 투입이 이루어지며, 이 때 먼저 투입된 도전성 카본이 완전 분산된 이후에 나머지 도전성 카본을 투입하는 것을 특징으로 하는 도전성 실리콘 함침액의 제조방법.The conductive carbon to be added in the third step is divided into the input is made, wherein the conductive silicon impregnated liquid, characterized in that the first conductive carbon is completely dispersed after the addition of the remaining conductive carbon. 제2항에 있어서,The method of claim 2, 상기 제3공정 이후에 상기 제3공정의 혼합물을 칭량하여 증발된 유기용제의 양을 보충하는 공정이 더 포함된 것을 특징으로 하는 도전성 실리콘 함침액의 제조방법.And a step of replenishing the amount of the evaporated organic solvent by weighing the mixture of the third step after the third step. 상기 제1항의 도전성 실리콘 함침액이 경화제 2∼7phr과 함께 함침되어 도전성을 갖게 된 폴리우레탄 스펀지.A polyurethane sponge in which the conductive silicone impregnation liquid of claim 1 is impregnated with 2 to 7 phr of a curing agent to become conductive. 실리콘 폴리머 100중량부에 대해 유기용제 250∼340phr을 투입하여 상기 실리콘 폴리머가 상기 유기용제에 완전 분산되도록 혼합하는 제1공정;A first step of mixing 250 to 340 phr of an organic solvent with respect to 100 parts by weight of a silicone polymer and mixing the silicone polymer to be completely dispersed in the organic solvent; 상기 제1공정의 혼합물에 도전액 2∼7phr을 투입하여 혼합하는 제2공정;A second step of mixing 2-7 phr of a conductive solution into the mixture of the first step; 상기 제2공정의 혼합물에 도전성 카본 15∼25phr을 투입하여 혼합하는 제3공정;A third step of mixing 15-25 phr of conductive carbon into the mixture of the second step; 상기 제3공정의 혼합물에 경화제 2∼7phr을 투입하여 혼합하는 제4공정;A fourth step of mixing 2-7 phr of a curing agent to the mixture of the third step; 상기 제4공정의 혼합물에 폴리우레탄 스펀지를 투여하는 제5공정;A fifth step of administering a polyurethane sponge to the mixture of the fourth step; 상기 제5공정을 거친 폴리우레탄 스펀지를 건조시키는 제6공정을 포함하여 이루어지는 폴리우레탄 스펀지의 제조방법.A method for producing a polyurethane sponge comprising a sixth step of drying the polyurethane sponge passed through the fifth step.
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