JPH11114837A - Polishing body and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively manufacture a polishing body while maintaining excellent polishing force by laminating a polishing layer composed of an abrasive material and a binder on a flexible support body, and heating/drawing the polishing layer together with the support body. SOLUTION: A polishing body is formed by arranging a polishing layer by dispersing an abrasive material having the average particle size of about 0.1 to 100 μm such as alumina oxide and chromium oxide at a blending rate of about 1 to 90 wt.% in a binder, on a flexible support body by a polyester film or the like. In a manufacturing method of the polishing body, a pellet of polyethylene terephthalate is heated, melted and kneaded as the support body. A pellet of polyester being a binder is heated, melted, and kneaded together with the abrasive material and a dispersion assistant as the polishing layer. It is formed as a sheet by being cast on a drum by simultaneous extrusion from a two-port die together with a melt of the support body. Then, it is longitudinally and laterlally heated/drawn to about three times, and after heat treatment is performed at a prescribed temperature, the polishing body is cooled and wound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing body in which a polishing layer formed by dispersing an abrasive in a binder is provided on a flexible support, and a method for producing the same.

[0002]

2. Description of the Related Art Abrasives include abrasive tapes, abrasive sheets, abrasive cards, and abrasive papers. The grinding power and abrasiveness of these abrasives depend on the particle size of the abrasive used, the surface roughness of the abrasive layer made of the abrasive, and the rigidity of the abrasive support.

[0003] Conventionally, the flexible support and the polishing layer have been formed in separate steps. That is, for example, after a flexible support is cast to a predetermined thickness, it is stretched by heating and a flexible support having a predetermined thickness is provided in advance and prepared. On this flexible support, a coating solution in which an abrasive, a binder, a solvent, and the like constituting the polishing layer are dispersed is applied, and this is dried and solidified to form a polishing layer. That is, the step of manufacturing the flexible support and the step of forming the polishing layer are performed completely separately.

[0004] Japanese Patent Publication No. 4-40156 discloses that
There is disclosed a polishing sheet formed by a film in which abrasive grains are uniformly dispersed in an aromatic polyamide. However, such a polishing sheet in which the abrasive grains are dispersed also in the portion of the support that does not contribute to the polishing requires a large amount of abrasive grains, which is not efficient and disadvantageous in terms of cost.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a polishing body comprising a polishing layer containing an abrasive on a flexible support not containing an abrasive. The formation of the polishing layer and the formation of the polishing layer can be performed in one step.

That is, the present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a polishing body which can be manufactured at low cost while maintaining a good polishing force, and a method of manufacturing the same. Things.

[0007]

In order to solve the above-mentioned problems, a polishing body of the present invention has a structure in which a polishing layer comprising an abrasive and a binder is laminated on a flexible support, and the polishing layer is heated and stretched together with the support. It is characterized by becoming.

Preferably, the abrasive contains at least one of chromium oxide, alumina oxide, silicon carbide, and diamond. The average particle size of this abrasive is
0.1 to 100 μm, and the compounding ratio in the polishing layer is 1 to
It is preferably 90% by weight. The support is desirably provided by a polyester film.

On the other hand, in the method for producing a polishing body of the present invention, a polishing layer composition comprising an abrasive and a binder is laminated on the above-mentioned support at the same time as or after the formation of the flexible support. A polishing layer is provided, and the support is heated and stretched together with the polishing layer.

Specifically, the binder is melted, the polishing composition kneaded and dispersed with the abrasive is heated to a temperature above the softening point, and the polishing layer is laminated on the support by simultaneous extrusion or sequential extrusion with the support composition. Then, it is preferable to manufacture by heating and stretching.

[0011]

According to the present invention as described above, a polishing layer composed of an abrasive and a binder is laminated on a flexible support before heating and stretching, thereby forming a film of the support and laminating the polishing layer. Can be manufactured in one step, and the manufacturing process can be shortened while maintaining the grinding force of the polishing body, and the cost can be reduced.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the polishing body of the present invention will be shown, and the present invention will be described in more detail.

The abrasive of the present invention comprises a flexible support made of a polyester film or the like, and an abrasive having an average particle size of 0.1 to 100 μm such as alumina oxide or chromium oxide is used as a binder in an amount of 1 to 90% by weight. The polishing layer is provided with a polishing layer dispersed at a compounding ratio, and the polishing layer is laminated before the support is heated and stretched.

Further, in the above-mentioned method for producing a polishing body, a polishing layer is laminated simultaneously or continuously with the formation of a support, and thereafter, heat stretching is performed. For example, as a support, polyethylene terephthalate pellets at 200 to 350 ° C.
For example, it is melted and kneaded at 280 ° C. As a polishing layer, polyester pellets serving as a binder (glass transition temperature: Tg 67 ° C., softening point 170 ° C., molecular weight 200)
00) is melted at 200 to 350 ° C., for example, 250 ° C., and an abrasive (WA2000) is added and kneaded with a dispersing agent (for example, oleic acid) if necessary. Then, it is heated to a temperature of 200 to 350 ° C., for example, 280 ° C., which is higher than the softening point, and is cast on a drum by simultaneous extrusion with a melt of the support from a two-neck die to form a sheet. The extruding may be in the form of a casting of the support followed by a sequential extruding of the abrasive layer thereon. Subsequently, the film is heated and stretched 1.5 to 4 times, for example, 3 times vertically and horizontally at 130 to 160 ° C.
A heat treatment is performed at 0 to 250 ° C. to cool and wind the abrasive body.

The flexible support used in the present invention may be made of polyesters such as polyethylene terephthalate and polyethylene naphthalate, polyolefins such as polypropylene, cellulose derivatives such as cellulose triacetate and cellulose diacetate, and vinyl such as polyvinyl chloride. Plastics such as base resins, polycarbonate, polyimide, polyamide, polysulfone, polyphenylsulfone, and polybenzoxazole can be used.

As a specific example of the support, polyethylene terephthalate (PET) is preferred. In the film formation of the support alone, for example, polyethylene terephthalate pellets are melted at 280 ° C., cast into a sheet having a thickness of 800 μm, and then subjected to longitudinal stretching (3 times) and transverse stretching (3 times) at 130 ° C. Then, heat treatment is performed at 250 ° C. A polymer support is formed by heat fixing by this heat treatment.

The abrasive used in the polishing layer of the present invention is generally a material having a polishing action or a polishing action, such as α-alumina, γ-alumina, α, γ-alumina, fused alumina, silicon carbide, and chromium oxide. , Cerium oxide, corundum, artificial diamond, diamond, α-iron oxide, garnet, emery (main component: corundum and magnetite), garnet, silica, silicon nitride, boron nitride, molybdenum carbide, boron carbide, tungsten carbide, titanium carbide For example, a material having a Mohs hardness of 6 or more is used in a combination of 1 to 4 types. These abrasives have an average particle size of 0.1 to 100 μm. These abrasives are used in the range of 10 to 1000 parts by weight of the binder with respect to 100 parts by weight of the abrasive in the case of the polishing layer.

Specific examples of the abrasive include AKP1, AKP15, AKP20, AKP30, and AK manufactured by Sumitomo Chemical Co., Ltd.
P50, AKP80, Hit50, Hit100, etc. and Fujimi's WA6000, WA4000, WA2000,
WA1200, WA600, WA320 and the like. These are disclosed in JP-B-52-28642, JP-B-49-39402, JP-A-63-98828, U.S. Pat. No. 3,687,725, U.S. Pat.
US Patent No. 3041196, US Patent No. 3293066
No. 3,630,910, U.S. Pat. No. 3,833,341.
No. 2, U.S. Pat. No. 4,117,190, British Patent 11453
49, West German Patent 853211 and the like.

As the binder used in the polishing layer of the present invention, conventionally known thermoplastic resins, thermosetting resins, reactive resins, electron beam curing resins, ultraviolet ray curing resins, visible ray curing resins, and the like. Is used.

The thermoplastic resin has a softening temperature of 200
C. or lower, having an average molecular weight of 10,000 to 300,000 and a degree of polymerization of about 50 to 2,000, more preferably 20 to 2,000.
It is about 0 to 800. For example, vinyl chloride vinyl acetate copolymer, vinyl chloride copolymer, vinyl chloride vinyl acetate vinyl alcohol copolymer, vinyl chloride vinyl alcohol copolymer, vinyl chloride vinylidene copolymer, vinyl acrylonitrile copolymer, acrylic acid Ester acrylonitrile copolymer, acrylate vinylidene chloride copolymer, acrylate styrene copolymer, methacrylate acrylonitrile copolymer,
Methacrylic acid ester vinylidene chloride copolymer, methacrylic acid ester styrene copolymer, urethane elastomer, nylon-silicone resin, nitrocellulose-polyamide resin, polyfucca vinyl, vinylidene chloride acrylonitrile copolymer, butadiene acrylonitrile copolymer, polyamide Resins, polyvinyl butyral, cellulose derivatives (cellulose acetate butyrate, cellulose diacetate, cellulose triacetate, cellulose propionate, nitrocellulose, ethyl cellulose, methyl cellulose, propyl cellulose, methyl ethyl cellulose, carboxymethyl cellulose,
Acetylcellulose), various synthetic rubber-based thermoplastic resins such as styrene-butadiene copolymer, polyester resin, polycarbonate resin, chlorovinyl ether acrylate copolymer, amino resin, polyamide resin, and mixtures thereof. .

Examples of these resins are described in JP-B-37-68.
No. 77, JP-B-39-12528, JP-B-39-19
No. 282, No. 40-5349, No. 40-20
No. 907, JP-B-41-9463, JP-B-41-14
No. 059, JP-B-41-16985, JP-B-42-6
No. 428, JP-B-42-11621, JP-B-43-4
No. 623, JP-B-43-15206, JP-B-44-2
No. 889, No. 44-17947, No. 44-1
No. 8232, No. 45-14020, No. 45-
14500, JP-B-47-18573, JP-B-47
-22063, JP-B-47-2264, JP-B-4
7-22068, JP-B-47-22069, JP-B-47-22070, JP-B-47-27886, JP-A-57-133521, JP-A-58-137133, JP-A-58-166533, and JP-A-58-166533. 58-222433,
JP-A-59-58642 and the like, U.S. Pat.
And U.S. Pat. No. 4,752,530.

As the thermosetting resin or the reactive resin,
It is preferable that the molecular weight of the coating liquid is 200,000 or less, and the molecular weight becomes infinite by a reaction such as condensation and addition by heating and humidifying after coating and drying. Among these resins, those which do not soften or melt before the resin is thermally decomposed are preferable. Specifically, for example, phenol resin, phenoxy resin, epoxy resin,
Polyurethane resin, polyester resin, polyurethane polycarbonate resin, urea resin, melamine resin, alkyd resin, silicone resin, acrylic reaction resin (electron beam curing resin), epoxy-polyamide resin, nitrocellulose melamine resin, high molecular weight polyester resin and isocyanate resin Mixture of polymers, mixture of methacrylate copolymer and diisocyanate prepolymer, mixture of polyester polyol and polyisocyanate, urea formaldehyde resin, mixture of low molecular weight glycol / high molecular weight diol / triphenylmethane triisocyanate, polyamine resin, polyimine Resins and mixtures thereof.

Examples of these resins are described in JP-B-39-810.
No. 3, JP-B-40-9779, JP-B-41-7192
No., JP-B-41-8016, JP-B-41-14275
No., JP-B-42-18179, JP-B-43-1208
No. 1, Japanese Patent Publication No. 44-28023, Japanese Patent Publication No. 45-145
No. 01, JP-B-45-24902, JP-B-46-13
103, JP-B-47-2265, JP-B-47-2
No. 2066, JP-B-47-22067, JP-B-47-
22072, JP-B-47-22073, JP-B-47
-28045, JP-B-47-28048, JP-B-4
It is described in publications such as 7-28922.

These thermoplastic resins, thermosetting resins, and reactive resins have carboxylic acid (COOM), sulfinic acid, sulfenic acid, sulfonic acid (SO ₃ M), phosphoric acid (PO (OM) (OM)), phosphonic acid, sulfuric acid (OSO ₃ M), and acidic groups such as ester groups thereof (M is H, an alkali metal, an alkaline earth metal,
Hydrocarbon groups), amino acids; aminosulfonic acids, sulfuric acid or phosphoric acid esters of amino alcohols, amphoteric groups such as alkyl betaine, amino groups, imino groups, imide groups, amide groups, etc., and also hydroxyl groups, alkoxyl groups, Thiol group, alkylthio group, halogen group (F, Cl, B
r, I), usually containing at least one but not more than six kinds of silyl groups, siloxane groups, epoxy groups, isocyanato groups, cyano groups, nitrile groups, oxo groups, acryl groups and phosphine groups, each functional group being 1 to 1 g of resin. × 10 ^-6 eq to 1 × 10
^-2 eq is preferred.

The polyisocyanate used in the polishing layer of the present invention includes tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, naphthylene-1,5-diisocyanate, o-toluidine diisocyanate, and isophorone diisocyanate. Isocyanates such as triphenylmethane triisocyanate and isophorone diisocyanate, products of the isocyanates and polyalcohols, polyisocyanates of 2 to 10-mers produced by condensation of isocyanates, and products of polyisocyanates and polyurethanes Those whose terminal functional groups are isocyanates can be used. The average molecular weight of these polyisocyanates is 100
Those of 20,000 are preferred.

Commercially available trade names of these polyisocyanates include Coronate L, Coronate HL, Coronate 2030, Coronate 2031, Millionate MR, Millionate MTL (manufactured by Nippon Polyurethane Co., Ltd.), Takenate D-102, and Takenate D-110.
N, Takenate D-200, Takenate D-202, Takenate 300S, Takenate 500 (manufactured by Takeda Pharmaceutical Co., Ltd.), Sumidur T-80, Sumidur 44S, Sumidur PF, Sumidur L, Sumidur N, Desmodur L , Death module IL, death module N, death module HL, death module T65, death module 15, death module R, death module R
F, death module SL, death module Z4273
(Manufactured by Sumitomo Bayer Co., Ltd.), and these can be used alone or in combination of two or more by utilizing the difference in curing reactivity.

For the purpose of accelerating the curing reaction, a hydroxyl group (butanediol, hexanediol, having a molecular weight of 100
A compound having an amino group (such as monomethylamine, dimethylamine, or trimethylamine), a metal oxide catalyst, or a catalyst such as iron acetylacetonate can also be used in combination. It is desirable that these compounds having a hydroxyl group or an amino group are polyfunctional. These polyisocyanates have a total amount of binder resin and polyisocyanate of 10 in the polishing layer and the back layer.
It is preferably used in an amount of 2 to 70 parts by weight per 0 parts by weight, more preferably 5 to 50 parts by weight. Examples of these are disclosed in JP-A-60-131622 and JP-A-61-741.
No. 38 and the like.

In addition, compounds having various functions are added to the polishing layer as additives. For example, a dispersant, a lubricant, an antistatic agent, an antioxidant, a fungicide, a coloring agent, a solvent, and the like are added.

The powdery lubricant used in the polishing layer of the present invention includes graphite, molybdenum disulfide, boron nitride, graphite fluoride, calcium carbonate, barium sulfate, silicon oxide, titanium oxide, zinc oxide, tin oxide, and the like. Inorganic fine powder such as tungsten disulfide, acrylic styrene resin fine powder, benzoguanamine resin fine powder, melamine resin fine powder,
There are resin fine powders such as polyolefin resin fine powder, polyester resin fine powder, polyamide resin fine powder, polyimide resin fine powder, and polyhooker ethylene resin fine powder.

As the organic compound-based lubricant, silicone oil (dialkyl polysiloxane, dialkoxy polysiloxane, phenyl polysiloxane, fluoroalkyl polysiloxane (KF96, KF69 manufactured by Shin-Etsu Chemical Co., Ltd.)
)), Fatty acid-modified silicone oil, fluoroalcohol, polyolefin (polyethylene wax, polypropylene, etc.), polyglycol (ethylene glycol, polyethylene oxide wax, etc.), tetrafluoroethylene oxide wax, polytetrafluoroglycol, perfluoroalkyl ether, perfluoro Fatty acids, perfluoro fatty acid esters, perfluoroalkyl sulfates, perfluoroalkyl sulfonates, perfluoroalkylbenzene sulfonates, perfluoroalkyl phosphates, and other compounds containing fluorine or silicon, alkyl sulfates, alkyl sulfonates , Alkyl phosphonic acid triester,
Organic acids and organic acid ester compounds such as alkyl phosphonic acid monoesters, alkyl phosphonic acid diesters, alkyl phosphate esters, succinate esters, triazaindolizine, tetraazaindene, benzotriazole, benzotriazine, benzodiazole, EDTA, etc. Heterocyclic compounds containing nitrogen and sulfur, C10-4
0 monobasic fatty acid and any one or more of monohydric alcohols having 2 to 40 carbon atoms or dihydric alcohols, trihydric alcohols, tetrahydric alcohols, and hexahydric alcohols Fatty acid esters, carbon number 10
Fatty acid esters of monohydric to hexahydric alcohols having a total of 11 to 70 carbon atoms in total with at least one monobasic fatty acid and the number of carbon atoms of the fatty acid, fatty acids or fatty acid amides having 8 to 40 carbon atoms , Fatty acid alkylamides and aliphatic alcohols can also be used.

Specific examples of these compounds include butyl caprylate, octyl caprylate, ethyl laurate, butyl laurate, octyl laurate, ethyl myristate, butyl myristate, octyl myristate, 2-ethylhexyl myristate, Ethyl palmitate, butyl palmitate, octyl palmitate, 2 ethylhexyl palmitate, ethyl stearate, butyl stearate, isobutyl stearate, octyl stearate, 2 ethyl hexyl stearate, amyl stearate, isoamyl stearate, 2 stearic acid
Ethylpentyl, 2-hexyldecyl stearate, isotridecyl stearate, stearic acid amide, alkyl stearate, butoxyethyl stearate,
Anhydrosorbitan monostearate, anhydrosorbitan distearate, anhydrosorbitan tristearate, anhydrosorbitan tetrastearate, oleyl oleate, oleyl alcohol, lauryl alcohol, montan wax, carnauba wax, etc. used alone or in combination it can.

The lubricant used in the present invention includes:
Lubricating oil additives can be used alone or in combination. Antioxidants known as rust inhibitors (metal chelates such as alkylphenol, benzotriazine, tetraazaindene, sulfamide, guanidine, nucleic acid, pyridine, amine, hydroquinone, EDTA, etc.) Agents), rust inhibitors (naphthenic acid, alkenyl succinic acid, phosphoric acid, dilauryl phosphate, etc.), oil agents (rapeseed oil, lauryl alcohol, etc.), extreme pressure agents (dibenzyl sulfide, tricresyl phosphate, tributyl) Phosphite, etc.), detergents / dispersants, viscosity index improvers, pour point depressants, foaming agents and the like. These lubricants are added in the range of 0.01 to 30 parts by weight based on 100 parts by weight of the binder. These are described in JP-B-43-23889 and JP-B-48-24.
No. 041, JP-B-48-18482, JP-B-44-1
8221, JP-B-47-28043, JP-B-57-5
6132, JP-A-59-8136, JP-A-59-81
39, JP-A-61-85621, U.S. Pat.
No. 233, U.S. Pat.
No. 2235, U.S. Pat. No. 3,497,411, U.S. Pat.
No. 23086, U.S. Pat. No. 3,625,760, U.S. Pat.
No. 630772, US Pat. No. 3,634,253, US Pat. No. 3,642,539, US Pat. No. 3,687,725, US Pat. No. 4,350,311, US Pat. No. 4,497,864, US Pat. No. 4,552,794, IBM Technical Disclosure Britain (IBM Technical)
Disclosure Bulletin) Vol.
9, No7, p779 (December 1966), ELEKTRONIK 1961 No12,
p380, Handbook of Chemistry, Advanced Edition, p954-967, 19
It is described in 1980 Maruzen Issuance.

The dispersants and dispersing agents used in the present invention include caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, and stearolic acid. Fatty acids having 2 to 40 carbon atoms (R ₁ COOH, R ₁ is an alkyl group having ₁ to 39 carbon atoms, phenyl group, aralkyl group) such as behenic acid, maleic acid and phthalic acid; alkali metals of the above fatty acids (Li, Na, K, NH ₄ ^+, etc.) or alkaline earth metals (Mg, Ca, Ba, etc.), metal soaps (copper oleate) composed of Cu, Pb, etc., fatty acid amides; lecithin (soybean oil lecithin), etc. Is used. In addition, higher alcohols having 4 to 40 carbon atoms (butanol, octyl alcohol, myristyl alcohol, stearyl alcohol) and their sulfates, sulfonic acids, phenylsulfonic acids, alkylsulfonic acids, sulfonic esters, phosphoric monoesters, phosphoric diesters , Phosphoric acid triesters, alkylphosphonic acids, phenylphosphonic acids, amine compounds and the like can also be used. Further, polyethylene glycol, polyethylene oxide, sulfosuccinic acid, metal sulfosuccinate, sulfosuccinate, and the like can also be used. One or more of these dispersants are usually used, and one type of dispersant is used in an amount of 0.0
It is added in the range of 0.5 to 20 parts by weight. Regarding the method of using these dispersants, the dispersants may be previously adhered to the surface of the abrasive or non-abrasive fine powder, or may be added during dispersion. Such materials are disclosed, for example, in JP-B-39-28369 and JP-B-4
No. 4-17945, JP-B-44-18221, JP-B-48-7441, JP-B-48-15001, JP-B-48-15002, JP-B-48-16363, JP-B-49-39402, U.S. Pat. And No. 3470021.

The antifungal agent used in the present invention includes 2- (4
-Thiazolyl) -benzimidazole, N- (fluorodichloromethylthio) -phthalimide, 10.10'-
Oxybisphenoxalcin, 2,4,5.6 tetrachloroisophthalonitrile, P-tolyldiiodomethylsulfone, triiodoallyl alcohol, dihydroacetoacid, mercury phenyloleate, bis (tributyltin) oxide, saltylani There are rides. Such a substance is described in, for example, "Microbial Disaster and Prevention Technology", Engineering Book, 1972, "Chemistry and Industry", 32, 904 (1979).

As the antistatic agent used in the present invention, carbon black can be used.
Thermal for rubber, black for color, acetylene black and the like can be used. Its specific surface area is 5-500
m ² / g, DBP oil absorption 10-400 ml / 100
g, pH 2-10, water content 0.1-10%, tap density 0.1-1 g / cm ² . As a specific example of this carbon black, BLACKPEARLS 2000, 1300, 1 manufactured by Cabot Corporation
000,900,800,700, manufactured by Mitsubishi Chemical Corporation:
650B, 950B, 3250B, 850, 900, 9
60,980,1000,2300,2400,260
0 and the like. In addition, carbon black that has been subjected to surface treatment with a dispersant or the like or graphitized with a resin can also be used.

As the antistatic agent other than carbon black used in the present invention, graphite, modified graphite,
Conductive powders such as carbon black graft polymer, tin oxide-antimony oxide, tin oxide, titanium oxide-tin oxide-antimony oxide; natural surfactants such as saponin; alkylene oxide-based, glycerin-based, glycidol-based, polyhydric alcohol, Nonionic surfactants such as polyhydric alcohol esters and alkylphenol EO adducts; higher alkylamines, cyclic amines, hydantoin derivatives, amidoamines, esteramides, quaternary ammonium salts, pyridine and other heterocycles, phosphoniums and sulfoniums Anionic surfactants containing acidic groups such as carboxylic acid, sulfonic acid, phosphonic acid, phosphoric acid, sulfate ester group, phosphonate ester, phosphate ester group; amino acids; aminosulfonic acids, sulfuric acid of amino alcohol Other phosphoric esters, amphoteric surfactants such as alkyl betaine type and the like are used.

Some of the examples of the surfactant compound which can be used as the antistatic agent are described in JP-A-60-28025, US Pat. Nos. 2,271,623, 2,224,472, and 22.
88226, 2676122, 2676924
Nos. 2,676,975, 2,691,566,27
27860, 2730498, 2742379
Nos. 2739891, 3068101, 31
No. 58484, No. 3201253, No. 32010191
Nos. 3,294,540, 3,415,649 and 34
No. 41413, No. 3444254, No. 3475174
No. 3,545,974, West German Patent Publication (OLS) 19
No. 42665, British Patent Nos. 1077317 and 1198
No. 450, Ryohei Oda et al., "Synthesis of Surfactants and Their Applications" (Maki Shoten, 1972 edition); W. "Surfes Active Age Entities" by Beili (Interscience Publication Corporation 1
985); P. Encyclopedia of Surfactive Agents, Vol. 2 (Chemical publishing company, 1964 edition) by Sisley; Surfactant Handbook, 6th printing (Sangyo Tosho Co., Ltd.,
December 20, 1966); Hideo Marumo, "Antistatic Agent"
Koshobo (1968) and the like.

These surfactants may be added alone or as a mixture. The amount of these surfactants used in the abrasive body is 0.01 to 10 per 100 parts by weight of the abrasive.
Parts by weight. The amount used in the back layer is binder 1
It is 0.01 to 30 parts by weight per 00 parts by weight. These are used as antistatic agents, but are sometimes applied for other purposes such as improvement of dispersion, improvement of lubricity, coating aid, wetting agent, curing accelerator, and dispersion accelerator. .

As the organic solvent used in the dispersion, kneading and coating of the present invention, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, isophorone and tetrahydrofuran in any ratio; methanol, ethanol, propanol and butanol , Isobutyl alcohol, isopropyl alcohol, alcohols such as methylcyclohexanol; methyl acetate,
Ester systems such as ethyl acetate, butyl acetate, isobutyl acetate, isopropyl acetate, ethyl lactate and glycol monoethyl ether; ether systems such as diethyl ether, tetrahydrofuran, glycol dimethyl ether, glycol monoethyl ether and dioxane; benzene, toluene, xylene, Tar-based (aromatic hydrocarbons) such as cresol, chlorobenzene, and styrene; chlorinated hydrocarbons such as methylene chloride, ethylene chloride, carbon tetrachloride, chloroform, ethylene chlorohydrin, and dichlorobenzene; NN-dimethylformaldehyde , Hexane and the like can be used. These solvents are generally used in two or more kinds at an arbitrary ratio. Further, a trace amount of impurities (polymer of the solvent itself, moisture, raw material components, etc.) may be contained in an amount of 1% by weight or less. An aqueous solvent can also be used.

The method of dispersion and kneading is not particularly limited, and the order of addition of each component (resin, powder, lubricant, solvent, etc.)
The addition position during dispersion / kneading, the dispersion temperature (0 to 80 ° C.) and the like can be appropriately set. For the preparation of the abrasive paint a usual kneading machine, for example, a two-roll mill, a three-roll mill,
Ball mill, pebble mill, tron mill, sand grinder, Szegvari attritor,
High-speed impeller, disperser, high-speed stone mill, high-speed impact mill, disper, kneader, high-speed mixer, ribbon blender, co-kneader, intensive mixer, tumbler, blender, disperser, homogenizer, single-screw extruder, twin-screw extruder And an ultrasonic disperser. Usually, a plurality of these dispersing and kneading machines are provided for dispersing and kneading, and the treatment is continuously performed. For more information on kneading and dispersing technology,
T. C. PATTON (T.C.Patton) "P
aint Flow and Pigment Dis
version "(Paint Flow and Pigment Dispersion) 1964 John Wile
Published by y & Sons (John Wheelie and
Sands)) and Shinichi Tanaka, Industrial Materials, Vol. 25, 37 (19
77) and the cited reference of the book. As an auxiliary material for the dispersion and kneading, a steel ball, a steel bead, a ceramic bead, a glass bead, and an organic polymer bead having an equivalent sphere diameter of 10 cmφ to 0.05 mmφ can be used in order to efficiently promote the dispersion and kneading. These materials are not limited to spherical shapes. It is also described in specifications such as U.S. Patent Nos. 2,581,414 and 2,855,156. Also in the present invention, the coating liquid for the polishing layer can be prepared by kneading and dispersing according to the method described in the above-mentioned book or the literature cited therein.

As a method of applying the above-mentioned polishing layer on the support, simultaneous extrusion (co-extrusion) is performed together with the support in a heated and molten state, or an underlayer (support) is extruded to form a film, and then the upper layer is formed. Is coated with a polishing layer. After laminating the polishing layer on the support as described above, the film is stretched by heating. After the film is oriented and stretched at 120 to 160 ° C., it is cooled and wound up. This stretching is carried out either vertically or horizontally or both vertically and horizontally.

When the polishing body is a polishing tape, the produced polishing tape is cut and wound on a desired plastic or metal reel. It is desirable to burnish and / or clean the abrasive tape or other abrasive body immediately before or before winding. Burnishes are designed to control the surface roughness and polishing power of the polished body.Specifically, the protrusions on the polished surface are cut with a hard material such as a sapphire blade, a razor blade, a carbide blade, a diamond blade, or a ceramic blade. Make it even or smooth. The Mohs hardness of these materials is preferably 8 or more, but is not particularly limited as long as protrusions can be removed. The shape of these materials does not need to be a blade in particular, and shapes such as a square shape, a round shape, and a wheel (these materials may be provided around a rotating cylindrical shape) can be used. The cleaning of the abrasive body is performed by wiping the surface layer of the abrasive body with a nonwoven fabric or the like in order to remove dirt and excess lubricant on the surface of the abrasive body. Such wiping materials include, for example, various types of Vilene manufactured by Japan Vilene Co., Ltd., Toraysee, Ecseine manufactured by Toray Industries, Kimwipe, various types of abrasives manufactured by Fuji Photo Film Co., Ltd. Tissue paper, such as nonwoven fabric made of rayon, nonwoven fabric made of acrylonitrile, and blended nonwoven fabric can be used. These are described, for example, in JP-B-46-39.
No. 309, JP-B-58-46768, JP-A-56-9
No. 0429, JP-B-58-46767, JP-A-63-463.
No. 259830, JP-A-1-201824 and the like.

The abrasives, binders, and binders used in the present invention
Additives (lubricants, dispersants, antistatic agents, surface treatment agents, carbon black, abrasives, light-blocking agents, antioxidants, antifungal agents, etc.), solvents and supports (undercoat layer, back layer, under back) (It may have a coating layer) or the production method thereof can be referred to the production method described in JP-B-56-26890 or the like.

[0044]

EXAMPLES Examples and comparative examples of the present invention will be shown below, and the characteristics thereof will be evaluated. In the examples, "parts" indicates "parts by weight".

Examples 1 and 2 Polyethylene terephthalate pellets are melted and kneaded at 280 ° C. as a support material. As a material of the polishing layer, an abrasive made of aluminum oxide (WA2000) is heated to 250 ° C. to dissolve a polyester (T
g 67 ° C, softening point 170 ° C, molecular weight 20,000), then raised to 280 ° C, co-extruded with the melt of the support from a two-neck die, and cast on a 140 ° C drum to form a sheet. And a polishing layer is laminated on the support. Then, at a temperature of 140 ° C., the film is stretched three times in each of the longitudinal direction and the lateral direction, and the heat-treated polishing film at 250 ° C. is cooled and wound up to obtain a polished body sample.

In this example, the final thickness of the support in the polished body thus produced was 75 μm, and a polishing layer was formed thereon, and in Example 1, a thickness of 15 μm was obtained.
Are laminated to a thickness of 20 μm.

Examples 1 and 2 and the following comparative examples 1 and 2
Table 1 shows the thickness of the support, the thickness of the polishing layer, the production method, the amount of polishing, and the energy consumption of each polishing body of No. 2. The polishing amount is a value obtained by polishing a test piece with each polishing body and comparing the polishing amount relatively, and the energy consumption is a comparison of the energy consumption required to manufacture each polishing body by a conventional manufacturing method. The relative values are shown assuming that the example is 100%.

<Comparative Examples 1 and 2> The polished bodies of Comparative Examples 1 and 2 were the same as the polished bodies of Examples 1 and 2 in the material of the support and the material of the polishing layer. Are the same. In contrast, in the above-described example, heating and stretching were performed after the polishing layer was applied, whereas in the comparative example,
A polishing layer is formed by applying a polishing layer on the support after heating and stretching in a step different from the film formation of the support.

From the results shown in Table 1, the polishing amount, that is, the polishing power is the same in Examples 1 and 2 and Comparative Examples 1 and 2.
The energy consumption required for the production was reduced to one half of that of the comparative example due to the one-stage production in the example of the present invention and the reduction in energy consumption during stretching and the like.

[0050]

[Table 1]

<Examples 3 and 4> Polyethylene terephthalate pellets are melted and kneaded at 280 ° C as a material for a support. As a material for the polishing layer, a polishing agent made of chromium oxide (average particle diameter: 0.1 μm) was used at 250 °
Polyester as a binder dissolved by heating in water (Tg 67 ° C, softening point 170 ° C, molecular weight 20,000)
After raising the temperature to 280 ° C, co-extrusion with the melt of the support was carried out from a two-neck die, cast on a 140 ° C drum to form a sheet, and a polishing layer was laminated on the support. It becomes. Then, at a temperature of 140 ° C., the film is stretched three times in each of the longitudinal direction and the lateral direction, and the heat-treated polishing film at 250 ° C. is cooled and wound up to obtain a polished body sample.

In this embodiment, the final thickness of the support in the polished body thus produced was 30 μm, and a polishing layer was formed thereon to a thickness of 5 μm in the third embodiment and to a thickness of 3 μm in the fourth embodiment. Laminated.

Examples 3 and 4 and Comparative Examples 3 and
Table 2 similarly shows the thickness of the support, the thickness of the polishing layer, the production method, the amount of polishing, and the energy consumption of each polishing body of No. 4.

<Comparative Examples 3 and 4> The polished bodies of Comparative Examples 3 and 4 were the same as the polished bodies of Examples 3 and 4 in the material of the support and the material of the polishing layer. Are the same. In contrast, in the above-described example, heating and stretching were performed after the polishing layer was applied, whereas in the comparative example,
A polishing layer is formed by applying a polishing layer on the support after heating and stretching in a step different from the film formation of the support.

From the results shown in Table 2, the polishing amount, that is, the polishing power is the same in Examples 3 and 4 and Comparative Examples 3 and 4.
The energy consumption required for the production was reduced to half that of the comparative example by reducing the energy consumption at the time of stretching and the like according to the example of the present invention in one-stage production, and the same result as in Table 1 above. was gotten.

[0056]

[Table 2]

Examples 5 and 6 Polyethylene terephthalate pellets are melted and kneaded at 260 ° C. as a material for a support. As a material for the polishing layer, a polishing layer composition having the following composition was heated to 280 ° C., dissolved and kneaded,
It is co-extruded with a melt of the support from a two-neck die at a temperature of 280 ° C., cast on a 130 ° C. drum to form a sheet, and a polishing layer is laminated on the support.
Thereafter, at a temperature of 130 ° C., the film is stretched three times in the machine direction and the transverse direction, and the heat-treated polishing film at 200 ° C. is cooled and wound up to obtain a sample of a polished body.

In this embodiment, the final thickness of the support in the polished body thus produced was 50 μm, and a polishing layer was formed thereon, and in Example 5, a thickness of 10 μm was obtained.
Are laminated to a thickness of 20 μm.

Examples 5 and 6 and the following comparative examples 5
Table 3 similarly shows the thickness of the support, the thickness of the polishing layer, the production method, the amount of polishing, and the energy consumption of each polishing body of No. 6.

<Comparative Examples 5 and 6> The polished bodies according to Comparative Examples 5 and 6 were the same as the polished bodies according to Examples 5 and 6 in the material of the support and the material of the polishing layer. Are the same. In contrast, in the above-described example, heating and stretching were performed after the polishing layer was applied, whereas in the comparative example,
A polishing layer is formed by applying a polishing layer on the support after heating and stretching in a step different from the film formation of the support.

From the results shown in Table 3, although the polishing amount, that is, the polishing power is the same in Examples 5 and 6 and Comparative Examples 5 and 6,
The energy consumption required for the production was reduced to half that of the comparative example by reducing the energy consumption at the time of stretching and the like according to the example of the present invention in one-stage production, and the same result as in Table 1 above. was gotten.

[Coating liquid composition] Abrasive particles: α-alumina (WA4000) 100 parts Binder resin: (polyester polyurethane, sodium sulfonate 1 × 10 ^-3 equivalent / g resin-containing, Mw 50000) 12 parts Polyisocyanate (trimethylolpropane) (1 mol) TDI (3 mol) adduct) 3 parts Lubricant: 0.1 part (oleic acid / oleyl oleate)

[0063]

[Table 3]

Claims (6)

[Claims] 1. A polishing body comprising: a polishing layer comprising an abrasive and a binder laminated on a flexible support; and the polishing layer is heated and stretched together with the support. 2. The polishing body according to claim 1, wherein the polishing agent contains at least one of chromium oxide, alumina oxide, silicon carbide, and diamond. 3. An abrasive having an average particle size of 0.1 to 0.1.
2. The polishing body according to claim 1, wherein the polishing body is 100 μm, and a blending ratio in the polishing layer is 1 to 90% by weight. 4. The polishing body according to claim 1, wherein the support is a polyester film. 5. A polishing layer composition comprising an abrasive and a binder is laminated on the support simultaneously with or subsequent to the formation of the flexible support film to form a polishing layer, and the polishing layer is formed together with the polishing layer. A method for producing a polishing body, wherein the support is heated and stretched. 6. A binder layer is melted, a polishing layer composition kneaded and dispersed with an abrasive is heated to a softening point or higher, and a polishing layer is laminated on a support by simultaneous extrusion or sequential extrusion with the support composition. The method for producing a polished body according to claim 5, further comprising heating and stretching.