KR20040009685A - The teatcup liner compound with improved flexibility and anticutting for milking machine - Google Patents

The teatcup liner compound with improved flexibility and anticutting for milking machine Download PDF

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KR20040009685A
KR20040009685A KR1020020043702A KR20020043702A KR20040009685A KR 20040009685 A KR20040009685 A KR 20040009685A KR 1020020043702 A KR1020020043702 A KR 1020020043702A KR 20020043702 A KR20020043702 A KR 20020043702A KR 20040009685 A KR20040009685 A KR 20040009685A
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rubber
weight
parts
liner
milking machine
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KR1020020043702A
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KR100483962B1 (en
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정미희
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정미희
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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
    • A61M1/062—Pump accessories
    • 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
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons

Abstract

PURPOSE: Provided is a liner rubber composition for a nipple cup of a milker, which has excellent cutting resistance and anti-fatigue and anti-cracking properties to decrease the generation of cracks by cutting and bending and to improve the life of the liner. CONSTITUTION: The liner rubber composition comprises a mixed rubber formed of 50-60 parts by weight of a natural rubber and 40-50 parts by weight of a butadiene rubber as a base rubber. In particular, the butadiene rubber contains 94% or more of the cis-form. In addition, the liner rubber composition further comprises 45-48 parts by weight of a carbon black having DBP oil absorption of 116g/100g to 124g/100g based on 100 parts by weight of the base rubber.

Description

내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물{The teatcup liner compound with improved flexibility and anticutting for milking machine}The teatcup liner compound with improved flexibility and anticutting for milking machine}

본 발명은 내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물에 관한 것으로 보다 상세하게는 천연고무 50∼60 중량부 및 cis 함량이 94% 이상인 부타디엔고무 40∼50 중량부가 혼합된 혼합고무를 원료고무로 사용하는 것을 특징으로 하는 내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물에 관한 것이다.The present invention relates to a rubber composition nipple cup liner rubber composition having excellent bending resistance and cutting resistance, and more specifically, 50 to 60 parts by weight of natural rubber and 40 to 50 parts by weight of butadiene rubber having a cis content of 94% or more. It relates to a milking machine teat cup liner rubber composition with excellent bending resistance and cutting resistance, characterized in that used as a raw material rubber.

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 여러가지모양의 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 라이너 내벽의 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. Various shapes are used, but the inner diameter of 22 mm or less is preferably used. Otherwise, vacuum pressure continues to irritate the nipples, which causes a problem of nipple sphincter damage. In addition, the deterioration of the liner is a decrease in elasticity and bacteria can grow in the gap between the inner wall of the liner, causing an increase in the chance of mastitis in cows and milk quality.

착유기 유두컵용 라이너는 내유성이 우수해야 하고 내굴곡성능, 내커팅특성, 내피로성능이 우수하게 설계되어야 한다. 그러나 종래의 라이너는 아크릴로니트릴부타디엔고무를 주 원료고무로 사용하여 내유성은 우수하지만, 외부의 날카로운 물체에 의해 커팅이 쉽게 되고, 흡입 및 팽창을 위한 반복굴신에 의해 크랙이 발생하여 제품의 수명이 단축되는 문제가 있다.The milking machine teat cup liner should have excellent oil resistance and be designed with excellent bending resistance, cutting resistance and fatigue resistance. However, the conventional liner uses acrylonitrile butadiene rubber as the main raw material rubber, but has excellent oil resistance, but is easily cut by external sharp objects, and cracks are generated by repeated bending for suction and expansion. There is a problem of being shortened.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로써, 착유기 유두컵용 라이너 고무조성물의 원료고무를 변경하여 내유성은 종래의 라이너와 동일한 수준으로 유지하면서 내굴곡특성 및 내커팅특성을 향상시켜 커팅과 반복굴신에 의해 발생하는 크랙을 방지하여 라이너의 내구성을 향상하고자 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 to improve the bending resistance and cutting resistance while maintaining the oil resistance at the same level as the conventional liner cutting It is intended to improve the durability of the liner by preventing cracks caused by excessive repeated bending.

즉, 본 발명은 원료고무로 천연고무(NR), cis 함량이 94% 이상인 부타디엔고무(BR)를 사용하여 우수한 내유성능을 유지하면서 내굴곡특성 및 내커팅특성이 향상된 착유기 유두컵용 라이너 고무조성물의 제공을 목적으로 한다.That is, the present invention using the natural rubber (NR) as the raw material rubber, butadiene rubber (BR) of cis content of 94% or more while maintaining the excellent oil resistance performance of the milking machine teat cup liner rubber composition for improved bending resistance and cutting resistance It is for the purpose of providing.

본 발명의 착유기 유두컵용 라이너 고무조성물은 공지의 착유기 유두컵용 라이너 고무조성물에 있어서, 천연고무 50∼60 중량부 및 cis 함량이 94% 이상인 부타디엔고무 40∼50 중량부가 혼합된 혼합고무를 원료고무로 사용하는 것을 특징으로 한다.The milking machine teat cup liner rubber composition of the present invention is a known milking machine teat cup liner rubber composition, wherein 50 to 60 parts by weight of natural rubber and 40 to 50 parts by weight of butadiene rubber having a cis content of 94% or more as a raw material rubber It is characterized by using.

한편 본 발명은 상기의 원료고무 100 중량부에 대하여 보강충진제로서 DBP 흡유량이 116g/100g∼124g/100g인 카본블랙 45∼48 중량부 포함할 수 있다.Meanwhile, the present invention may include 45 to 48 parts by weight of carbon black having a DBP oil absorption of 116 g / 100 g to 124 g / 100 g as a reinforcing filler based on 100 parts by weight of the raw material rubber.

상기와 같이 원료고무에 있어서 천연고무를 50∼60 중량부 및 cis 함량이 94% 이상인 부타디엔고무 40∼50 중량부를 사용하는 이유는 천연고무의 우수한 응력완화, 내마모성, 내인열성 및 내피로성과 부타디엔 고무의 우수한 내커팅성 및 저온특성을 부가하여 천연고무의 약점을 보완하기 위함이다.The reason for using 50 to 60 parts by weight of natural rubber and 40 to 50 parts by weight of butadiene rubber having a cis content of 94% or more in the raw rubber as described above is excellent in stress relaxation, abrasion resistance, tear resistance and fatigue resistance and butadiene rubber. This is to supplement the weakness of natural rubber by adding excellent cutting resistance and low temperature characteristics.

보강충진제인 카본블랙에 있어서 다양한 특성의 카본블랙을 여러 가지 사용량으로 사용한바 상기에서 언급한 특성의 카본블랙을 사용한 것이 본 발명의 목적에 부합하므로 본 발명에서 보강충진제인 카본블랙은 원료고무 100 중량부에 대하여 DBP 흡유량이 116g/100g∼124g/100g인 카본블랙 45∼48 중량부를 사용하는 것이 바람직하다.In the carbon black as a reinforcing filler, carbon black having various properties is used in various amounts. The use of carbon black having the above-mentioned characteristics is suitable for the purpose of the present invention. It is preferable to use 45-48 weight part of carbon black whose DBP oil absorption amount is 116g / 100g-124g / 100g with respect to a part.

한편 본 발명의 착유기 유두컵용 라이너 고무조성물은 상기에서 언급한 원료고무와 보강충진제인 카본블랙 이외에 활성제, 유황, 노화방지제, 공정유, 가류촉진제와 같은 공지의 첨가제를 포함할 수 있다. 그러나 이러한 공지의 첨가제들은 당업자에 있어서 임의적으로 선택하여 사용할 수 있는바 이에 대한 자세한 설명은 생략하기로 한다.Meanwhile, the liner rubber composition for the nipple cup of the milking machine of the present invention may include known additives such as activators, sulfur, anti-aging agents, process oils, and vulcanization accelerators, in addition to the above-mentioned raw rubber and carbon black, which is a 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 50 중량부, 산화마그네슘 5 중량부, 스테아린산 2 중량부, 노화방지제 5 중량부, 공정유 6 중량부, 가황제(유황) 1.6 중량부, 가황촉진제 1.2 중량부를 밴버리 믹서에서 혼합하여 라이너 고무를 제조하고 착유기 유두컵용 라이너는 160℃에서 15분간 가황하여 제조하였다.50 parts by weight of carbon black as a reinforcing filler, 5 parts by weight of magnesium oxide, and 2 parts of stearic acid based on 100 parts by weight of acrylonitrile butadiene rubber (NBR) having 35% acrylonitrile (ACN) as a raw material rubber as shown in Table 1 below. 5 parts by weight, 5 parts by weight of anti-aging agent, 6 parts by weight of process oil, 1.6 parts by weight of vulcanizing agent (sulfur), 1.2 parts by weight of vulcanization accelerator are mixed in a Banbury mixer to prepare a liner rubber and the milking machine teat cup liner is vulcanized at 160 ° C. for 15 minutes. It was prepared by.

<실시예 1><Example 1>

하기의 표 1과 같이 원료고무로서 천연고무(NR) 50 중량부, cis 함량이 94%인 부타디엔고무(BR) 50 중량부로 구성된 원료고무 100 중량부에 대하여 보강충진제로서 DBP 흡유량이 116g/100g ∼ 120g/100g인 카본블랙 48 중량부, 산화마그네슘4 중량부, 스테아린산 1.5 중량부, 공정유 5 중량부, 노화방지제 5 중량부, 가황제(유황) 1.4 중량부, 가황촉진제 0.7 중량부를 밴버리 믹서에서 혼합하여 라이너 고무를 제조하고 착유기 유두컵용 라이너는 160℃에서 15분간 가황하여 제조하였다.DBP oil absorption as a reinforcing filler with respect to 100 parts by weight of the raw material rubber consisting of 50 parts by weight of natural rubber (NR), 50 parts by weight of butadiene rubber (BR) having a cis content of 94% as shown in Table 1 below. 48 parts by weight of carbon black of 120g / 100g, 4 parts by weight of magnesium oxide, 1.5 parts by weight of stearic acid, 5 parts by weight of process oil, 5 parts by weight of antioxidant, 1.4 parts by weight of vulcanizing agent (sulfur), 0.7 parts by weight of vulcanization accelerator in Banbury mixer The liner rubber was prepared by mixing, and the liner for the nipple cup was vulcanized at 160 ° C. for 15 minutes.

<실시예 2><Example 2>

천연고무 60 중량부, cis 함량이 94%인 부타디엔고무 40 중량부로 구성된 혼합고무를 원료고무로 사용하는 것을 제외하고는 상기 실시예 1과 동일한 방법으로 라이너 고무 및 착유기 유두컵용 라이너를 제조하였다.A liner rubber and a milking machine teat cup liner were prepared in the same manner as in Example 1 except for using a mixed rubber composed of 60 parts by weight of natural rubber and 40 parts by weight of butadiene rubber having a cis content of 94%.

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

항목Item 비교예Comparative example 실시예 1Example 1 실시예 2Example 2 NBRNBR 100100 -- -- 천연고무Natural rubber -- 5050 6060 부타디엔고무Butadiene rubber -- 5050 4040 카보블랙(N351)Cabo black (N351) 5050 4848 4848 산화마그네슘Magnesium oxide 55 44 44 스테아린산Stearic acid 22 1.51.5 1.51.5 노화방지제Anti-aging 55 55 55 공정유Process oil 55 55 55 유황brimstone 1.61.6 1.41.4 1.41.4 가황촉진제Vulcanization accelerator 1.21.2 0.70.7 0.70.7

<시험예 1><Test Example 1>

상기 비교예 및 실시예의 고무에 대하여 ASTM 관련규정에 의하여 인장물성, 내커팅특성, 내피로특성(FTF), 내굴곡특성을 측정하고 그 결과를 아래의 표 2에 정리하여 나타내었다.Tensile properties, cutting resistance, fatigue resistance (FTF), and bending resistance characteristics of the rubbers of Comparative Examples and Examples were measured according to 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 실시예 1Example 1 실시예 2Example 2 인장물성(초기/노화)Tensile Properties (Initial / Aging) 경도(Shore A)Shore A 52/5452/54 54/5654/56 54/5554/55 300% 모듈러스(kg/cm2)300% modulus (kg / cm 2 ) 48/6148/61 68/10368/103 67/10167/101 인장강도(kg/cm2)Tensile Strength (kg / cm 2 ) 155/141155/141 215/192215/192 213/189213/189 신율(%)% Elongation 634/573634/573 653/582653/582 652/581652/581 내커팅특성(인열강도, kg/cm2)Cutting resistance (Tear strength, kg / cm 2 ) 9898 125125 123123 내피로특성(cycle)Fatigue Resistance Cycle 126,100126,100 424,100424,100 424,050424,050 내굴곡특성(가로×세로)Flexural Resistance (W × D) 11.2×15mm11.2 × 15mm 1.5×2.4mm1.5 × 2.4mm 1.6×2.51.6 × 2.5

*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

*내커팅특성 시험(Trouser Test) : ASTM D624에 준함* Trouser Test: According to ASTM D624

*내피로특성 평가(FTF, Monsanto Fatigue to Failure Test) : ASTM D4482에 준함* Fatigue resistance evaluation (FTF, Monsanto Fatigue to Failure Test): According to ASTM D4482

*내크랙특성 평가(De Mattia Test) : ASTM D813에 준함* De Mattia Test: According to ASTM D813

<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 실시예 1Example 1 실시예 2Example 2 라이너 사용기간Liner usage period 6.1개월6.1 months 11.7개월11.7 months 11.5개월11.5 months

상기 표 3에 알 수 있듯이 본 발명에 의한 라이너 고무는 종래의 라이너 고무에 비해 수명이 1.90∼1.92배 향상됨을 알 수 있었다.As can be seen in Table 3, the liner rubber according to the present invention was found to have a 1.90 to 1.92 times improvement in life compared to the conventional liner rubber.

상기의 시험예에서처럼 본 발명의 착유기 유두컵용 라이너 고무조성물에 의한 라이너 고무는 종래의 라이너 고무에 비해 인장물성은 동등 수준을 유지하고 있으며, 내커팅특성, 내피로특성 및 내크랙특성이 향상되어 커팅에 의한 균열과 반복굴신에 따른 크랙도 감소하여 라이너의 수명이 향상되므로 본 발명의 고무조성물에 의한 라이너를 사용함으로써 축산농가의 이익을 향상시킬 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 tensile properties as the conventional liner rubber, and has improved cutting resistance, fatigue resistance, and crack resistance. Since cracks due to cracking and cracking due to repeated bending are also improved, the lifespan of the liner is improved, and thus, the benefits of the livestock farm can be improved by using the liner by the rubber composition of the present invention.

Claims (3)

공지의 착유기 유두컵용 라이너 고무조성물에 있어서,In the known milking machine teat cup liner rubber composition, 천연고무 50∼60 중량부와 부타디엔고무 40∼50 중량부가 혼합된 혼합고무를 원료고무로 사용하는 것을 특징으로 하는 내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물Liner rubber composition for milking machine nipple cup with excellent bending resistance and cutting resistance, characterized by using a mixed rubber of 50 to 60 parts by weight of natural rubber and 40 to 50 parts by weight of butadiene rubber as a raw material rubber 제 1 항에 있어서, 부타디엔고무는 cis 함량이 94% 이상임을 특징으로 하는 내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물The butadiene rubber has a cis content of 94% or more, and a milking machine teat cup liner rubber composition having excellent bending resistance and cutting resistance. 제 1 항에 있어서, 원료고무 100 중량부에 대하여 DBP 흡유량이 116g/100g∼124g/100g인 카본블랙 45∼48 중량부 포함하는 것을 특징으로 하는 내굴곡 및 내커팅성능이 우수한 착유기 유두컵용 라이너 고무조성물The liner rubber for milking machine teat cups having excellent bending and cutting resistance according to claim 1, comprising 45 to 48 parts by weight of carbon black having a DBP oil absorption of 116 g / 100 g to 124 g / 100 g based on 100 parts by weight of the raw material rubber. Composition
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KR100479661B1 (en) * 2002-07-24 2005-03-30 이정길 The teatcup liner compound with improved durability for milking machine
KR100483963B1 (en) * 2002-07-24 2005-04-18 김향미 The teatcup liner compound with improved antifatigue for milking machine
CN105820379A (en) * 2016-04-15 2016-08-03 江苏骆氏减震件有限公司 Rubber shock absorption pad for automobile

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JP3338503B2 (en) * 1993-03-11 2002-10-28 株式会社ブリヂストン Pneumatic tire
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KR100479661B1 (en) * 2002-07-24 2005-03-30 이정길 The teatcup liner compound with improved durability for milking machine
KR100483963B1 (en) * 2002-07-24 2005-04-18 김향미 The teatcup liner compound with improved antifatigue for milking machine
KR100479662B1 (en) * 2002-07-24 2005-03-30 이정길 The white colored teatcup liner compound for milking machine

Cited By (3)

* 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
KR100483963B1 (en) * 2002-07-24 2005-04-18 김향미 The teatcup liner compound with improved antifatigue for milking machine
CN105820379A (en) * 2016-04-15 2016-08-03 江苏骆氏减震件有限公司 Rubber shock absorption pad for automobile

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