SU917207A1

SU917207A1 - Magnetic record carrier sensitive layer

Info

Publication number: SU917207A1
Application number: SU802972050A
Authority: SU
Inventors: Александр Тихонович Фалько; Иван Иванович Заболотный; Александр Кузьмич Трало
Priority date: 1980-08-01
Filing date: 1980-08-01
Publication date: 1982-03-30

Description

Изобретение относится к магнитной’ записи, а именно к носителям магнит-! ной записи.The invention relates to magnetic ’recordings, namely to magnetic media! Noah record.

Известен рабочий слой носителя магнитной записи, состоящий из магнитных частиц гамма-окиси железа, равномерно распределенных в связующем веществе L11 и Е2].A known working layer of a magnetic recording medium, consisting of magnetic particles of gamma-iron oxide, uniformly distributed in a binder L11 and E2].

Известный рабочий слой позволяет обеспечить относительно высокую эластичность носителя магнитной записи, однако не обладает достаточной износоустойчивостью. ,The known working layer allows for a relatively high elasticity of the magnetic recording medium, but does not have sufficient wear resistance. ,

Известен также рабочий слой носителя магнитной записи, состоящёй из магнитных частиц гамма-окиси железа, равномерно распределенных в частично омыленном сополимере винилхлорида с винилацетатом, полиуретановом каучуке, алкилполигликолевом эфире фосфорной кислоты и гексаметоксиметилмеламине. Этот рабочий слой обладает относительно высокой износоустойчивостью £31.Also known is a working layer of a magnetic recording medium consisting of magnetic particles of gamma-iron oxide uniformly distributed in a partially saponified copolymer of vinyl chloride with vinyl acetate, polyurethane rubber, alkyl polyglycol ether of phosphoric acid and hexamethoxymethylmelamine. This working layer has a relatively high wear resistance of £ 31.

Недостаток подобного рабочего слоя состоит в его слишком большом коэффициенте трения.The disadvantage of such a working layer is its too high coefficient of friction.

Цель изобретения - уменьшение коэффициента трения рабочего слоя носителя магнитной записи.The purpose of the invention is to reduce the coefficient of friction of the working layer of the magnetic recording medium.

Поставленная цель достигается за счет того, что в рабочий слой носителя магнитной записи введен фталоцианин меди при следующем соотношении компонентов, вес.%:This goal is achieved due to the fact that copper phthalocyanine is introduced into the working layer of the magnetic recording medium in the following ratio of components, wt.%:

Магнитные частицы гамма-окиси железа 40,3-63,0Magnetic particles of gamma-iron oxide 40.3-63.0

Частично омыленный. сополимер винилхролида с винилацетатом 7,5-8,1 Полиуретановый каучук 25,0-25,8 Алкилполигликолевый эфир фосфорной кислоты 0,60-0,76Partially saponified. vinyl chloride copolymer with vinyl acetate 7.5-8.1 Polyurethane rubber 25.0-25.8 Alkyl polyglycol ether phosphoric acid 0.60-0.76

Фталоцианин меди 0,64-22,50 Гексаметоксиметилмеламин - Осталь’** ное.Copper Phthalocyanine 0.64-22.50 Hexamethoxymethylmelamine - Remaining ’** noy.

Предлагаемый рабочий слой представ ляет собой тонкую пленку, размещенную на поверхности основы носителя „ магнитной записи и состоящую из магнитных частиц гамма-окиси железа, равномерно распределенных в частично омыленном сополимере винилхлорида с винилацетатом, полиуретановом каучуке_t алкилполигликолевом эфире 25 фосфорной кислоты, фталоцианине меди и гексаметоксиметилмеламине. При ; этом предлагаемый рабочий слой может содержать 40,3 вес.% магнитных частиц гамма-окиси железа, 8,1 вес.% частично омыленного сополимера винил3 хлорида с винилацетатом, 25,8 вес.% полиуретанового каучука, 0,76 вес.% алкилполигликолевого эфира фосфорной кислоты, 22,50 вэс.% Фталоцианина меди и 2,54 вес.% гексаметоксиметилмеламина. 5 [ Йаличие фталоцианина меди в предлагаемом рабочем слое позволяет обеспечить значительное уменьшение его коэффициента трения. Последнее приводит к увеличению срока службы маг- Ю нитных головок, взаимодействующих с предлагаемым рабочим слоем в процессе записи и воспроизведения.The proposed working layer is a thin film placed on the surface of the base of the magnetic recording medium and consisting of magnetic particles of gamma-iron oxide uniformly distributed in a partially saponified copolymer of vinyl chloride with vinyl acetate, polyurethane rubber _t 25 alkylpolyglycol ether of phosphoric acid, copper phthalocyanine and hexamethylmethoxymete . At; this proposed working layer may contain 40.3 wt.% magnetic particles of gamma-iron oxide, 8.1 wt.% partially saponified copolymer of vinyl 3 chloride with vinyl acetate, 25.8 wt.% polyurethane rubber, 0.76 wt.% alkylpolyglycol ether phosphoric acid, 22.50 wt.% copper phthalocyanine and 2.54 wt.% hexamethoxymethylmelamine. 5 [Copper phthalocyanine in the proposed working layer allows to significantly reduce its friction coefficient. The latter leads to an increase in the service life of magnetic heads interacting with the proposed working layer during recording and reproduction.

Использование предлагаемого изобретения, кроме уменьшения коэффициент 5 та трения рабочего слоя носителя магнитной записи, обеспечивает также получение высоких электромагнитных свойств, последнего.The use of the present invention, in addition to reducing the coefficient of 5 and friction of the working layer of the magnetic recording medium, also provides high electromagnetic properties, the latter.

Claims

The invention relates to magnetic recording, in particular to magnetic recording media. A working layer of the magnetic recording carrier is known, consisting of magnetic particles of gamma iron oxide uniformly distributed in the binding substance Lll and C2. The known working layer makes it possible to ensure a relatively high elasticity of the magnetic recording carrier, however, it does not possess sufficient wear resistance. A working layer of the magnetic recording carrier is also known, consisting of magnetic particles of iron oxide iron uniformly distributed in the partially saponified vinyl chloride-vinyl acetate copolymer , polyurethane rubber, alkyl polyflucic ester of FRS, fornsy acid and hexamethoxymethylmelamine. This working layer has a relatively high wear resistance PI. The disadvantage of this working layer is its too high coefficient of friction. The purpose of the invention is to reduce the coefficient of friction of the working layer, l magnetic recording. This goal is achieved due to the fact that copper phthalocyanine is introduced into the working layer of the magnetic recording carrier in the following ratio of components, wt.%: Magnetic particles of gamma-iron oxide 40.3-63.0 Partially saponified. Vinyl chloride copolymer with vinylacetate 7.5-8.1 Polyurethane rubber 25.0-25.8 Alkylpolyglycol phosphate ester 0.60-0.76 Phthalocyanine copper 0.64-22.50 Hexamethoxymethylmelamine - Else. The proposed working layer is a thin foam placed on the surface of the magnetic recording carrier base and consisting of magnetic particles of gamma iron oxide uniformly distributed in the partially washed vinyl chloride polymer with vinyl acetate, polyurethane rubber, alkyl polyglycol ether 9osphoric acid, and poly acid, polyurethane rubber, 9 -sporic acid ery acid, polyurethane rubber, polyurethane rubber, 9-esoproic acid, polyurethane rubber, polyurethane rubber, 9-sporic acid polyurethane, polyurethane rubber, polyurethane acid 9-steroic acid; hexamethoxymethylmelamine. Moreover, the proposed working layer may contain 40.3 wt.% Magnetic particles of gamma-iron oxide, 8.1 wt.% Partially saponified vinyl chloride / vinyl acetate copolymer, 25.8 wt.% Polyurethane rubber, 0.76 wt.% Alkyl polyglycol ether phosphoric acid, 22.50 w.a.% copper phthalocyanine and 2.54% by weight of hexamethoxymethyl melamine. The presence of copper phthalocyanine in the proposed working layer allows for a significant decrease in its coefficient of friction. The latter leads to an increase in the service life of magnetic: heads interacting with the proposed working layer in the process of recording and reproducing. The use of the invention, in addition to reducing the coefficient of friction of the working layer of the carrier of magnetic recording, also provides for obtaining high electromagnetic properties, the latter. The invention The working layer of the magnetic recording carrier, consisting of magnetic particles of G1mma-iron oxide, evenly distributed in the partially saponified copolymer of vinyl chloride with vinyl acetate, Polyurethane rubber, alkylpolyglycol phosphate and hexamethoxymethylmelamine, is in the form, which is applied. Copper phthalocyanine is introduced into it in the following ratio of components, wt.% Magnetic particles 40.3-63.0 gamma-iron oxide Partially saponified vinyl chloride copolymer with vinyl acetate 7.5–8.1 Polyurethane rubber 25.0–25.8 Phosphoric acid alkyl polyglycol ester0, 60–0.76 Copper phthalocyanine 0.64–22.50 Hex etoximethylmelamine Else Information sources taken into account during examination 1. Japanese Patent 47-27886, cl. 102 E 110.11, 07.25.72.

2. Japanese Patent 47-27887, cl. 102 E 110.11, 07.25.72.

3. Japan patent 48-7443, cl. 102 E 110.11, 06.03.73 (prototype).