KR20040009687A - The white colored teatcup liner compound for milking machine - Google Patents

The white colored teatcup liner compound for milking machine Download PDF

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KR20040009687A
KR20040009687A KR1020020043704A KR20020043704A KR20040009687A KR 20040009687 A KR20040009687 A KR 20040009687A KR 1020020043704 A KR1020020043704 A KR 1020020043704A KR 20020043704 A KR20020043704 A KR 20020043704A KR 20040009687 A KR20040009687 A KR 20040009687A
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rubber
weight
parts
liner
milking machine
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KR1020020043704A
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Korean (ko)
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KR100479662B1 (en
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이채용
이정길
박형련
김명선
이정치
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이채용
이정길
박형련
김명선
이정치
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Priority to KR10-2002-0043704A priority Critical patent/KR100479662B1/en
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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
    • C08L7/00—Compositions of natural rubber
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/06—Milking pumps
    • 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
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • 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
    • C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
    • C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
    • C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

PURPOSE: Provided is a white liner rubber composition for a nipple cup of a milker, which has a pure white appearance with maintaining tensile properties and life, so that the contamination of the liner is easily observed with the naked eye. CONSTITUTION: The liner rubber composition comprises 100 parts by weight of a base rubber consisting of 40-50 parts by weight of a natural rubber, 15-20 parts by weight of an ethylene-propylene-diene rubber and 35-40 parts by weight of a butyl rubber; and 40-45 parts by weight of a silica. In particular, the ethylene-propylene-diene rubber contains 43-53% of propylene, and the butyl rubber contains 2.0-2.5 mol% of bromine. Additionally, the silica has a BET surface area of 170-180 m¬2/g, a CTAB surface area of 155-165 m¬2/g and a DBP oil absorption of 200-216 ml/100g.

Description

착유기 유두컵용 백색 라이너 고무조성물{The white colored teatcup liner compound for milking machine}The white colored teatcup liner compound for milking machine

본 발명은 착유기 유두컵용 백색 라이너 고무조성물에 관한 것이다.The present invention relates to a white liner rubber composition for a milking machine teat cup.

젖소로부터 우유를 착유하는 장치인 착유기는 일반적으로 진공 발생 장치, 진공조절기, 진공계기, 맥동기, 밀크크로우, 라이너, 밀크라인 및 진공라인으로 이루어져 있다.Milking machines, which are milking milk from cows, generally consist of a vacuum generator, a vacuum regulator, a vacuum gauge, a pulsator, a milk crow, a liner, a milk line and a vacuum line.

이중 라이너는 젖소의 유두와 직접 접촉되는 유일한 부위로 유두조로부터 우유를 직접 배출시켜주는 통로 역할을 하는 것으로서 라이너는 착유기의 유두컵에 꼭 맞는 것으로 맞춤선에 따라 똑바로 끼워져야 하며 젖소의 유두에 따라 여러가지 모양의 것을 사용하고 있으나 통상 내경이 22㎜ 이하인 것을 사용하는 것이 바람직한데 그렇지 못할 경우 진공압이 계속해서 유두를 자극하여 유두 괄약근이 손상되는 문제가 있다. 또한 라이너가 노후화된 것은 탄력성이 저하되고 라이너내벽의 틈새로 세균이 번식하여 젖소의 유방염 발생 가능성의 증가와 우유품질 저하의 원인이 된다.The double liner is the only part that is in direct contact with the cow's nipple, and serves as a direct outlet for the milk from the nipple tank. The liner fits the nipple cup of the milking machine and should fit straight along the alignment line. Although various shapes are used, it is generally preferable to use an inner diameter of 22 mm or less. If not, there is a problem in that the vacuum pressure continues to stimulate the nipple and damage the nipple sphincter. In addition, the liner is to breed a bacterial clearance of the aging is the decrease is too lie inside wall resilient to be the cause of increase in the possibility of bovine mastitis caused and milk quality.

착유기 유두컵용 라이너는 내유성이 우수해야 하고 내오존성능, 내굴곡성능 및 내피로성능이 우수하게 설계되어야 할 뿐만 아니라 라이너 외부의 이물질을 쉽게 발견하여 이를 제거할 수 있어야 한다. 그러나 종래의 라이너는 아크릴로니트릴부타디엔고무를 주 원료고무로 사용하고 보강충진제로서 카본블랙을 사용하여 내유성은 우수하지만, 카본블랙의 영향에 의해 라이너 제품의 색상이 주로 검은색을 띠고 있어 라이너에 이물질이 묻거나 오염이 되었을 때 이를 쉽게 발견하지 못하는 단점이 있다.The milking machine teat cup liner should be designed with excellent oil resistance, excellent ozone resistance, bending resistance and fatigue resistance, and should be able to easily detect and remove foreign substances on the outside of the liner. However, the conventional liner uses acrylonitrile butadiene rubber as the main raw material rubber and carbon black as a reinforcing filler, and has excellent oil resistance.However, the color of the liner product is mainly black due to the influence of carbon black. There is a disadvantage that it is not easy to find it when it is stained or contaminated.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로써, 착유기 유두컵용 라이너 고무조성물의 원료고무를 변경하고 보강충진제로서 실리카를 사용하여 반복굴신에 의해 발생하는 크랙을 방지하여 라이너의 인장물성 및 수명을 종래 라이너와 동등수준을 유지하는 한편 라이너의 색상을 순백색으로 제조함으로써 라이너에 이물질이 묻거나 오염이 되었을 때 이를 쉽게 확인할 수 있는 라이너 고무조성물을 제공하고자 한다.The present invention has been made to solve the above problems, by changing the raw material rubber of the milking machine teat cup liner rubber composition and by using silica as a reinforcing filler to prevent cracking caused by repeated bending and the tensile properties of the liner and While maintaining the lifespan of the same level as the conventional liner, the color of the liner is made of pure white to provide a liner rubber composition that can be easily confirmed when foreign matter on the liner or stained.

즉, 본 발명은 천연고무(NR), 에틸렌프로필렌디엔고무(EPDM) 및 부틸고무 (Butyl rubber)로 이루어진 원료고무에 실리카를 사용하여 종래 라이너와 동등 수준 이상의 물성과 수명을 가지는 한편 라이너의 색상을 순백색으로 하여 라이너의 물질이 묻거나 오염이 되었을 때 이를 쉽게 확인할 수 있는 착유기 유두컵용 백색 라이너 고무조성물의 제공을 목적으로 한다.In other words, the present invention uses silica in the raw material rubber consisting of natural rubber (NR), ethylene propylene diene rubber (EPDM) and butyl rubber (Butyl rubber) to have the same physical properties and lifespan as those of the conventional liner, while also improving the color of the liner. An object of the present invention is to provide a white liner rubber composition for a milking machine teat cup that can be easily whitened and stained or stained.

본 발명의 착유기 유두컵용 백색 라이너 고무조성물은 공지의 착유기 유두컵용 라이너 고무조성물에 있어서, 천연고무(NR) 40∼50 중량부, 합성고무 50∼60 중량부가 혼합된 원료고무 100 중량부에 대하여 실리카 40∼45 중량부 포함하는 것을 특징으로 한다.The white liner rubber composition for the milking machine teat cup of the present invention, in the known milking machine teat cup liner rubber composition, silica based on 100 parts by weight of the raw material rubber 40 to 50 parts by weight of natural rubber (NR), 50 to 60 parts by weight of synthetic rubber It is characterized by including 40 to 45 parts by weight.

상기에서 합성고무는 프로필렌 함량이 43∼53% 함유된 에틸렌프로필렌디엔고무(EPDM) 15∼20 중량부, 브롬 함량이 2.0∼2.5몰%인 부틸고무(Butyl rubber) 35∼40 중량부가 혼합된 고무를 사용할 수 있다.In the above synthetic rubber, 15 to 20 parts by weight of ethylene propylene diene rubber (EPDM) containing 43 to 53% of propylene and 35 to 40 parts by weight of butyl rubber (2.0 to 2.5 mol% of bromine) are mixed. Can be used.

상기와 같이 원료고무에 있어서 천연고무를 40∼50 중량부, 프로필렌 함량이 43∼53% 함유된 에틸렌프로필렌디엔고무 15∼20 중량부, 브롬(bromine) 함량이 2.0∼2.5몰%인 부틸고무 35∼40 중량부 혼합된 혼합고무를 원료고무로 사용하는 이유는 천연고무의 우수한 응력완화, 내마모성, 내인열성 및 내피로성을 기본으로 하고 EPDM의 우수한 내오존성과 부틸고무의 낮은 가스투과성, 내화학성능을 부가하여 천연고무의 약점을 보완하기 위함이다.As described above, in the raw material rubber, 40 to 50 parts by weight of natural rubber, 15 to 20 parts by weight of ethylene propylene diene rubber containing 43 to 53% of propylene, and butyl rubber having a bromine content of 2.0 to 2.5 mol% 35 The reason for using the mixed rubber mixed with 40 parts by weight is based on the excellent stress relaxation, wear resistance, tear resistance and fatigue resistance of natural rubber, excellent ozone resistance of EPDM, low gas permeability and chemical resistance of butyl rubber. This is to supplement the weakness of natural rubber.

한편 본 발명에서 보강충진제로 사용하는 실리카는 40 중량부 미만 사용하면 보강충진제로서의 역할이 미미하고, 45 중량부 초과 사용하면 고무조성물의 물성이 적정 수준 이상으로 상승하여 공정성이 불리해지기 때문에 본 발명에서 실리카는 원료고무 100 중량부에 대하여 40∼45 중량부 포함하는 것이 좋다.On the other hand, the silica used as the reinforcing filler in the present invention is less than 40 parts by weight of the role as a reinforcing filler, the use of more than 45 parts by weight rises the physical properties of the rubber composition to an appropriate level or more disadvantageous process because the present invention In the silica, preferably 40 to 45 parts by weight based on 100 parts by weight of the raw material rubber.

본 발명에서 사용하는 실리카에 있어서, 다량한 특성을 가지는 실리카를 사용한바 BET 표면적이 170∼180m2/g, CTAB 표면적이 155∼165m2/g, DBP 흡유량은 200∼216㎖/100g인 특성을 가지는 실리카의 사용이 본 발명의 목적과 부합되어 본 발명에서 실리카는 전기의 특성을 가지는 것을 사용하는 것이 바람직하다.In the silica used in the present invention, silica having a large amount of properties is used, and the BET surface area is 170 to 180 m 2 / g, CTAB surface area is 155 to 165 m 2 / g, and the DBP oil absorption is 200 to 216 ml / 100 g. It is preferable to use silica having electrical properties in the present invention because the use of the silica having the same with the object of the present invention.

또한 실리카는 투명한 성상을 가지고 있어 종래 카본블랙을 사용하는 라이너 고무 보다는 보다 밝은 색상의 라이너 고무를 제조할 수 있다.In addition, since the silica has a transparent property, it is possible to produce a lighter color liner rubber than a liner rubber using a conventional carbon black.

본 발명의 착유기 유두컵용 라이너 고무조성물은 상기에서 언급한 원료고무, 보강충진제 이외에 활성제, 유황, 노화방지제, 공정유, 착색제, 가류촉진제와 같은 공지의 첨가제를 포함할 수 있다. 그러나 이러한 공지의 첨가제들은 당업자에 있어서 임의적으로 선택하여 사용할 수 있는바 이에 대한 자세한 설명은 생략하기로 한다.The liner rubber composition for the nipple cup of the milking machine of the present invention may include known additives such as active agents, sulfur, anti-aging agents, process oils, colorants, and vulcanization accelerators, in addition to the above-mentioned raw rubber and reinforcing filler. However, such known additives may be arbitrarily selected and used by those skilled in the art, and a detailed description thereof will be omitted.

이하 본 발명을 다음의 실시예 및 시험예에 의하여 설명하고자 한다. 그러나 이들은 본 발명을 설명하기 위한 일예로서 이들이 본 발명의 권리범위를 한정하는 것은 아니다.Hereinafter, the present invention will be described by the following examples and test examples. However, these are only examples for explaining the present invention and they do not limit the scope of the present invention.

<비교예>Comparative Example

하기의 표 1과 같이 원료고무로서 아크릴로니트릴(ACN) 함량이 35%인 아크릴로니트릴부타디엔고무(NBR) 100 중량부에 대하여 보강충진제인 카본블랙(N351) 50 중량부, 산화마그네슘 5 중량부, 스테아린산 2 중량부, 노화방지제 5 중량부, 공정유 6 중량부, 유황 1.6 중량부, 가황촉진제 1.2 중량부를 밴버리 믹서에서 혼합하여 라이너 고무를 제조하였고 착유기 유두컵용 라이너는 160℃에서 15분간 가황하여 제조하였다.50 parts by weight of carbon black (N351), a reinforcing filler, and 5 parts by weight of magnesium oxide, based on 100 parts by weight of acrylonitrile butadiene rubber (NBR) having an acrylonitrile (ACN) content of 35% as a raw material rubber, as shown in Table 1 below. , 2 parts by weight of stearic acid, 5 parts by weight of antioxidant, 6 parts by weight of process oil, 1.6 parts by weight of sulfur, 1.2 parts by weight of vulcanization accelerator were mixed in a Banbury mixer to prepare a liner rubber. Prepared.

<실시예><Example>

하기의 표 1과 같이 원료고무로서 천연고무(NR) 50 중량부, 프로필렌 함량이 43% 함유된 에틸렌프로필렌디엔고무(EPDM) 15 중량부, 브롬 함량이 2.0몰%인 부틸고무 50 중량부로 구성된 원료고무 100 중량부에 대하여 실리카(coupsil-8108) 40 중량부, 착색제로 이산화티타늄(TiO2) 30 중량부, 산화마그네슘 5 중량부, 스테아린산 2 중량부, 노화방지제 5 중량부, 공정유 4 중량부, 유황 1.2 중량부, 가황촉진제 2.3 중량부를 밴버리 믹서에서 혼합하여 라이너 고무를 제조하였고 착유기 유두컵용 라이너는 160℃에서 15분간 가황하여 제조하였다.Raw material composed of 50 parts by weight of natural rubber (NR), 15 parts by weight of ethylene propylene diene rubber (EPDM) containing 43% propylene, and 50 parts by weight of butyl rubber having a bromine content as shown in Table 1 below. 40 parts by weight of silica (coupsil-8108), 30 parts by weight of titanium dioxide (TiO 2 ) as a coloring agent, 5 parts by weight of magnesium oxide, 2 parts by weight of stearic acid, 5 parts by weight of antioxidant, 4 parts by weight of process oil , 1.2 parts by weight of sulfur and 2.3 parts by weight of vulcanization accelerator were mixed in a Banbury mixer to prepare a liner rubber, and the milking machine teat cup liner was vulcanized at 160 ° C. for 15 minutes.

한편 상기에서 실리카는 BET 표면적이 170∼180m2/g, CTAB 표면적이 155∼165m2/g, DBP 흡유량은 200∼216㎖/100g인 것을 사용하였다.On the other hand, silica was used as the BET surface area of 170 ~ 180m 2 / g, CTAB surface area of 155 ~ 165m 2 / g, DBP oil absorption of 200 ~ 216ml / 100g.

표 1. 비교예 및 실시예의 고무조성물(단위 : 중량부)Table 1. Rubber compositions of Comparative Examples and Examples (unit: parts by weight)

항목Item 비교예Comparative example 실시예Example NBRNBR 100100 -- 천연고무Natural rubber -- 5050 EPDMEPDM -- 1515 부틸고무Butyl rubber -- 3535 카본블랙(N351)Carbon black (N351) 5050 -- 실리카(coupsil-8108)Silica (coupsil-8108) -- 4040 착색제coloring agent -- 3030 산화마그네슘Magnesium oxide 55 55 스테아린산Stearic acid 22 22 노화방지제Anti-aging 55 55 공정유Process oil 66 44 유황brimstone 1.61.6 1.21.2 가황촉진제Vulcanization accelerator 1.21.2 2.32.3

<시험예 1><Test Example 1>

상기 비교예 및 실시예의 고무에 대하여 육안으로 라이너 고무의 외관과ASTM 관련규정에 의하여 인장물성을 측정하고 그 결과를 아래의 표 2에 정리하여 나타내었다.For the rubbers of the Comparative Examples and Examples, the tensile properties were measured visually by the appearance of the liner rubber and ASTM related regulations, and the results are summarized in Table 2 below.

표 2. 비교예 및 실시예 고무의 물성측정 결과Table 2. Measurement results of the physical properties of the rubbers of Comparative Examples and Examples

항 목Item 비교예Comparative example 실시예Example 인장물성(초기/노화)Tensile Properties (Initial / Aging) 경도(Shore A)Shore A 52/5452/54 51/5351/53 300% 모듈러스(kg/cm2)300% modulus (kg / cm 2 ) 48*6148 * 61 45/6345/63 인장강도(kg/cm2)Tensile Strength (kg / cm 2 ) 155/141155/141 156/152156/152 신율(%)% Elongation 634/573634/573 653/582653/582 외관(색상)Appearance (color) 검은색Black color 순백색Pure white

*인장 초기 시험 : ASTM D412에 준하여 평가* Initial tensile test: evaluated according to ASTM D412

*인장 노화 시험 : 105℃오븐에서 24시간 노화 후 ASTM D412에 준하여 평가* Tensile Aging Test: Evaluates according to ASTM D412 after 24 hours aging in 105 ℃ oven

<시험예 2><Test Example 2>

상기 비교예 및 실시예의 방법으로 제조한 라이너 10개를 각각 동일한 제품의 착유기 유두컵에 장착하고 라이너 고무에 크랙이 발생할 때까지의 사용한 평균 기간을 아래의 표 3에 나타내었다.Ten average liners prepared by the method of Comparative Examples and Examples were mounted in the milking machine teat cup of the same product, respectively, and the average period of use until cracking occurred in the liner rubber is shown in Table 3 below.

표 3. 비교예 및 실시예의 라이너 고무의 사용기간Table 3. Service life of liner rubber of comparative example and example

항목Item 비교예Comparative example 실시예Example 라이너 사용기간Liner usage period 6.0개월6.0 months 8.1개월8.1 months

상기 표 3에 알 수 있듯이 본 발명에 의한 라이너 고무는 종래의 라이너 고무와 비교하여 동등수준 이상의 수명을 가짐을 알 수 있었다.As can be seen in Table 3, the liner rubber according to the present invention was found to have a lifespan equal to or higher than that of the conventional liner rubber.

상기의 시험예에서처럼 본 발명의 착유기 유두컵용 라이너 고무조성물에 의한 라이너 고무는 종래의 라이너 고무에 비해 인장물성과 수명은 동등 수준을 유지하고 있으며, 라이너 외관이 순백색으로 되어 있어 라이너에 이물질이 묻거나 오염되었을 때 이를 육안으로 쉽게 확인할 수 있어 축산농가에서는 젖소의 유두와 집유된 원유의 위생관리를 보다 용이하게 할 수 있다.As in the above test example, the liner rubber of the milking machine teat cup liner rubber composition of the present invention maintains the same level of tensile properties and lifespan as the conventional liner rubber, and the liner appearance is pure white so that foreign matters on the liner When contaminated, it can be easily identified with the naked eye, which makes it easier for livestock farms to manage hygiene of cow's nipples and collected milk.

Claims (4)

공지의 착유기 유두컵용 라이너 고무조성물에 있어서,In the known milking machine teat cup liner rubber composition, 천연고무 40∼50 중량부, 에틸렌프로필렌디엔고무 15∼20 중량부, 부틸고무 35∼40 중량부로 이루어진 원료고무 100 중량부에 대하여 실리카 40∼45 중량부 포함하는 것을 특징으로 하는 착유기 유두컵용 백색 라이너 고무조성물White liner for milking machine teat cups comprising 40 to 45 parts by weight of silica based on 100 parts by weight of raw material rubber consisting of 40 to 50 parts by weight of natural rubber, 15 to 20 parts by weight of ethylene propylene diene rubber, and 35 to 40 parts by weight of butyl rubber. Rubber composition 제 1 항에 있어서, 에틸렌프로필렌디엔고무는 프로필렌 함량이 43∼53% 함유된 것 임을 특징으로 하는 착유기 유두컵용 라이너 고무조성물The composition of claim 1, wherein the ethylene propylene diene rubber contains 43 to 53% of propylene. 제 1 항에 있어서, 부틸고무는 브롬 함량이 2.0∼2.5몰% 함유된 것임을 특징으로 하는 착유기 유두컵용 라이너 고무조성물The butyl rubber according to claim 1, wherein the butyl rubber contains a bromine content of 2.0 to 2.5 mol%. 제 1 항에 있어서, 실리카는 BET 표면적이 170∼180m2/g, CTAB 표면적이 155∼165m2/g, DBP 흡유량은 200∼216㎖/100g의 특성을 가짐을 특징으로 하는 착유기 유두컵용 라이너 고무조성물The liner rubber according to claim 1, wherein the silica has a BET surface area of 170 to 180 m 2 / g, CTAB surface area of 155 to 165 m 2 / g, and a DBP oil absorption of 200 to 216 ml / 100 g. Composition
KR10-2002-0043704A 2002-07-24 2002-07-24 The white colored teatcup liner compound for milking machine KR100479662B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100479661B1 (en) * 2002-07-24 2005-03-30 이정길 The teatcup liner compound with improved durability for milking machine
KR100483962B1 (en) * 2002-07-24 2005-04-18 정미희 The teatcup liner compound with improved flexibility and anticutting for milking machine

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JPH07113915A (en) * 1993-10-20 1995-05-02 Sumitomo Electric Ind Ltd Separating tool for multifiber coated optical fiber ribbon
US5493995A (en) * 1994-05-16 1996-02-27 Alfa Laval Agri, Inc. Collapsing teat cup liner with tapering barrel wall
JP3744570B2 (en) * 1995-07-31 2006-02-15 ピジョン株式会社 Milking machine
US5872176A (en) * 1997-07-11 1999-02-16 Bridgestone Corporation Addition of salts to improve the interaction of silica with rubber
JPH11189676A (en) * 1997-12-26 1999-07-13 Bridgestone Corp Rubber composition for covering cord end
KR100351008B1 (en) * 2000-05-23 2002-08-30 한국타이어 주식회사 A rubber composition for tire sidewalls
KR100479661B1 (en) * 2002-07-24 2005-03-30 이정길 The teatcup liner compound with improved durability for milking machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100479661B1 (en) * 2002-07-24 2005-03-30 이정길 The teatcup liner compound with improved durability for milking machine
KR100483962B1 (en) * 2002-07-24 2005-04-18 정미희 The teatcup liner compound with improved flexibility and anticutting for milking machine

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