SU862210A1

SU862210A1 - Magnetic record carrier working layer

Info

Publication number: SU862210A1
Application number: SU802896270A
Authority: SU
Inventors: Раиса Ивановна Иванченко; Алексей Иванович Дунаев; Юрий Александрович Буреев; Евгений Николаевич Никонов; Лариса Юрьевна Иванова; Людмила Аркадьевна Донец; Василий Антонович Боголюбский
Priority date: 1980-05-19
Filing date: 1980-05-19
Publication date: 1981-09-07

Description

(54) РАБОЧИЙ СЛОЙ НОСИТЕЛЯ МАГНИТНОЙ ЗАПИСИ(54) WORKING LAYER OF THE MEDIA MAGNETIC RECORDING

II

Изобретение относитс к области магнитной записи, а именно к носител м магнитной записи.The invention relates to the field of magnetic recording, in particular to magnetic recording media.

Известен рабочий слой носител магнитной записи, состо щий из магнитных частиц V -окиси железа, распределенных в полимерном веществе 1, 2.A working magnetic carrier recording layer is known, consisting of magnetic particles of V-iron oxide distributed in a polymeric substance 1, 2.

Известный рабочий слой обладает относительно высокой износоустойчивостью, однако имеет низкую чувствительность.Known working layer has a relatively high wear resistance, however, has a low sensitivity.

Известен также рабочий слой носител магнитной записи, содержащий полученные из гетита и модифицированные фосфором игольчатые магнитные частицы У окиси железа, распределенные в смеси диалкилполигликолевого эфира фосфорной кислоты, полиуретанового каучука, гексаметоксиметилмеламина ,додецилбензолсульфокислоты , олеиновой кислоты и поливинилформальэтилал или частично омыленного сополимера винилхлорида, винилацетата или винилового спирта 3.Known as the carrier of the magnetic alcohol 3.

Этот рабочий слой имеет относительно высокую чувствительность. Недостаток подобного рабочего сло состоит в том, что он не позвол ет обеспечить высокий уровень записи при допустимых нелинейных искажени х.This working layer has a relatively high sensitivity. The disadvantage of such a working layer is that it does not allow for a high level of recording with permissible nonlinear distortions.

Цель изобретени - повыщение уровн записи при допустимых нелинейных искажени х .The purpose of the invention is to increase the recording level with allowable non-linear distortion.

Claims

This is achieved due to the fact that needle-shaped magnetic particles of γ-iron oxide obtained from leidocrocite, distributed among needle-derived magnetic particles of v-iron oxide obtained from goethite and phosphorus-modified magnetic particles, are introduced into the working layer of the magnetic recording medium, in the following ratio of components, weight. %: needle-shaped magnetic particles of γ-iron oxide obtained from goethite and modified with phosphorus - 27.0-70.0; the needle-like filaments of γ-iron oxide obtained from leidocrocite - 4.0–40.0; Phosphoric acid dialkyl polyglycol ester - 0.1-0.2; polyvinylformalethyl or partially saponified copolymer of vinyl chloride, vinyl acetate and vinyl alcohol 12.0-18.0; polyurethane rubber - 8.0-12.0; hexamethoxymethylmelamine - 1.5-1.8; dodecylbenzene sulfonic acid - 0.5-0.7 and oleic acid - the rest. Proposed working layer is a film mounted on a nonmagnetic based magnetic recording medium, and comprises goethite and derived from phosphorus-modified acicular magnetic iron particles have -okisi distributed in the mixture dialkilpoliglikolevogo ether phosphoric acid poliuretanoBOgo rubber, hexamethoxymethylmelamine, dodecylbenzenesulfonic acid, oleic acid and polyvinylformalethyl or partially saponified copolymer of vinyl chloride, vinyl acetate and vinyl alcohol. The working layer also contains needle-like magnetic particles 1-iron oxide obtained from lepidocrocite, distributed among needle-magnetic iron-oxide particles obtained from goethite and phosphorus-modified needle-like magnetic particles. In this case, the working layer may contain 27.0 weight. / o obtained from goethite and phosphorus-modified needle-shaped magnetic particles of y-iron oxide, 40.0 weight. % y-iron oxide needle magnetic particles obtained from lepidocrocite, 0.2 wt.% phosphoric acid dialkyl polyglycol ester, 18.0 wt.% polyvinylformal ethyl, or partially saponified copolymer of vinyl chloride, vinyl acetate and vinyl alcohol, 19.0 wt.% polyurethane rubber, 1.8% by weight of hexamethoxymethylmelamine, 0.7% by weight of dodecylbenzenesulfonic acid and 0.3% by weight / oleic acid. The proposed working layer provides a relatively high magnetization accuracy in the recording process in accordance with the recorded signal. In the process of reproduction, the proposed working layer allows to ensure high accuracy of recovery of the recorded signal. The use of the invention makes it possible to significantly increase the recording level with allowable non-linear distortion. Formula of the working medium alcohol, characterized in that, in order to increase the recording level with allowable non-linear distortion In this case, needle-like magnetic particles of γ-iron oxide obtained from lepidocrocite, distributed among needle-shaped magnetic particles of γ-iron oxide obtained from goethite and modified with phosphorus, are introduced into it, in the following ratio of components, wt.%: Magnetic particles obtained from goethite and modified with phosphorus y-iron oxide 27,0-70,0 Needle magnetic particles obtained from lepidocrocite y-iron oxide 4-40-40.0 Phosphoric acid dialkyl polyglycol ester 0.1-0.2 Polyvinylformal ethyl or partially saponified vinyl copolymer chloride, vinyl acetate and vinyl alcohol 12,0-18,0 Polyurethane rubber 8,0-12,0 Hexamethoxymethyl melamine 1,5- 1,8 Dodecylbenzenesulfonic acid 0, 5-0,7 Oleic acid Others Sources of information taken into account during the examination 1. Patent Japan No. 44-17947 Cl. 102 E 11, 1969.

2. Japanese Patent No. 47--18572, cl. 102 E PO, 1972.

3. USSR author's certificate number 587495, cl. G 11 B 5/68, 1976 (prototype).