JPS63225756A - Lead screw - Google Patents
Lead screwInfo
- Publication number
- JPS63225756A JPS63225756A JP29801786A JP29801786A JPS63225756A JP S63225756 A JPS63225756 A JP S63225756A JP 29801786 A JP29801786 A JP 29801786A JP 29801786 A JP29801786 A JP 29801786A JP S63225756 A JPS63225756 A JP S63225756A
- Authority
- JP
- Japan
- Prior art keywords
- lead screw
- liquid crystal
- crystal polyester
- thermal expansion
- polyester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920000728 polyester Polymers 0.000 claims abstract description 35
- 239000011256 inorganic filler Substances 0.000 claims abstract description 9
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 9
- 239000004974 Thermotropic liquid crystal Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 7
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 4
- 230000000704 physical effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- -1 aromatic dicarboxylic acids Chemical class 0.000 description 26
- 238000000034 method Methods 0.000 description 15
- 239000007788 liquid Substances 0.000 description 14
- 229920000642 polymer Polymers 0.000 description 13
- 150000001875 compounds Chemical class 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 10
- 239000000178 monomer Substances 0.000 description 9
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005992 thermoplastic resin Polymers 0.000 description 5
- FJKROLUGYXJWQN-UHFFFAOYSA-N 4-hydroxybenzoic acid Chemical compound OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 150000001555 benzenes Chemical class 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XBNGYFFABRKICK-UHFFFAOYSA-N 2,3,4,5,6-pentafluorophenol Chemical compound OC1=C(F)C(F)=C(F)C(F)=C1F XBNGYFFABRKICK-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 3
- 239000004917 carbon fiber Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- IZUPBVBPLAPZRR-UHFFFAOYSA-N pentachloro-phenol Natural products OC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl IZUPBVBPLAPZRR-UHFFFAOYSA-N 0.000 description 3
- 229920006295 polythiol Polymers 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 2
- PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 description 2
- 229940090248 4-hydroxybenzoic acid Drugs 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- MNZMMCVIXORAQL-UHFFFAOYSA-N naphthalene-2,6-diol Chemical compound C1=C(O)C=CC2=CC(O)=CC=C21 MNZMMCVIXORAQL-UHFFFAOYSA-N 0.000 description 2
- 125000001624 naphthyl group Chemical group 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- CNHDIAIOKMXOLK-UHFFFAOYSA-N toluquinol Chemical compound CC1=CC(O)=CC=C1O CNHDIAIOKMXOLK-UHFFFAOYSA-N 0.000 description 2
- 125000004343 1-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])(*)C([H])([H])[H] 0.000 description 1
- LMXZDVUCXQJEHS-UHFFFAOYSA-N 2-(1-phenylethyl)benzene-1,4-diol Chemical compound C=1C(O)=CC=C(O)C=1C(C)C1=CC=CC=C1 LMXZDVUCXQJEHS-UHFFFAOYSA-N 0.000 description 1
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- KAUQJMHLAFIZDU-UHFFFAOYSA-N 6-Hydroxy-2-naphthoic acid Chemical compound C1=C(O)C=CC2=CC(C(=O)O)=CC=C21 KAUQJMHLAFIZDU-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 229920000106 Liquid crystal polymer Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 235000010582 Pisum sativum Nutrition 0.000 description 1
- 240000004713 Pisum sativum Species 0.000 description 1
- 229920001283 Polyalkylene terephthalate Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical class [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000002252 acyl group Chemical group 0.000 description 1
- 125000004423 acyloxy group Chemical group 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 125000001118 alkylidene group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 150000004984 aromatic diamines Chemical class 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N hydroquinone methyl ether Natural products COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- PCILLCXFKWDRMK-UHFFFAOYSA-N naphthalene-1,4-diol Chemical compound C1=CC=C2C(O)=CC=C(O)C2=C1 PCILLCXFKWDRMK-UHFFFAOYSA-N 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical group C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000343 polyazomethine Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000004246 zinc acetate Substances 0.000 description 1
Landscapes
- Transmission Devices (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Moving Of Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、特にフロッピーディスク、ハードディスク及
びポータプルコンパクトディスク等の装置に使用される
リードスクリューに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lead screw used particularly in devices such as floppy disks, hard disks, and portable compact disks.
一般的にフロッピーディスク装置では、磁気記録媒体を
回転させた状態で磁気ヘッドによりデータの記録又は再
生が行われる。磁気ヘッドは、通常キャリッジ装置によ
り保持され、必要な時に磁気記録媒体上の所定のトラッ
クまで移動される。キャリッジ装置は、磁気ヘッドを搭
載したキャリッジ本体の両側部に円筒状の滑り軸受部を
備え、それらに挿通した二本のレールで摺動自在に支承
されている。キャリッジ本体の移動は、通常ステップモ
ータが使用されるが、これをキャリッジに伝達する方式
にはベルト方式とリードスクリュ一方式があり、これま
ではその移動速度の点から、スチール製のベルト巻き取
り巻き戻しによるベルト方式で行われている。Generally, in a floppy disk device, data is recorded or reproduced by a magnetic head while a magnetic recording medium is rotated. The magnetic head is usually held by a carriage device and is moved to a predetermined track on a magnetic recording medium when necessary. The carriage device includes cylindrical sliding bearings on both sides of a carriage body on which a magnetic head is mounted, and is slidably supported by two rails inserted through these bearings. A step motor is normally used to move the carriage body, but there are two methods for transmitting the motor to the carriage: a belt method and a lead screw method. Until now, from the viewpoint of movement speed, a steel belt winding was used. It is carried out using a belt method with return.
他方、リードスクリュ一方式は移動速度が小さいため余
り使用されていなかったが、フロッピーディスクドライ
ブ装置の小型化、ポータプル化、ひいては省エネルギー
化の必要性から再び見直されてきている。リードスクリ
ュ一方式は、第１図の如くステップモータ１で駆動され
て回転するリードスクリュー２と、このスクリュー溝に
嵌合したヘッドアクチニエータ−３とを主要部とし、ヘ
ッドの位置決めをステップモータで駆動されたリードス
クリューの回転角により直接行うため、リードスクリユ
ーの温度、湿度などによる伸縮が直接その精度に影響し
、−ＩＩＩＱ的に伸縮の大きいプラスチックスは使用さ
れていないが、フロッピーディスクドライブ装置の小型
化、軽量化、ポータプル化のためにはそのプラスチック
ス化が望まれる所である。On the other hand, the single-lead screw type was not used much because of its slow movement speed, but it is being reconsidered due to the need to make floppy disk drive devices more compact and portable, and ultimately to save energy. As shown in Fig. 1, the main parts of the one-type lead screw are a lead screw 2 which is driven and rotated by a step motor 1, and a head actiniator 3 fitted into this screw groove, and the positioning of the head is performed by the step motor. Because the rotation angle of the lead screw driven by In order to make drive devices smaller, lighter, and portable, it is desirable to use plastics.
本発明者は溶融時に異方性を示すサーモトロピック液晶
ポリエステル（以下、液晶性ポリエステルと略す）がそ
の物性からしてリードスクリューに適した材料であるこ
とに着目して研究を進めた。The present inventor conducted research focusing on the fact that thermotropic liquid crystal polyester (hereinafter abbreviated as liquid crystal polyester), which exhibits anisotropy when melted, is a material suitable for lead screws due to its physical properties.
本発明者等の研究によれば、液晶性ポリエステルは、高
い強度、高い弾性率、低い成型収縮率、低い熱膨張率を
有し、精密成型品の製作には好適であるが、流動方向へ
の配向傾向が強いためこれらの物性も方向により相当異
なり、そのままではリードスクリューには使用できない
ことが判明した。そこで、本発明者等は更に研究を進め
た結果、液晶性ポリエステルに、無機フィラーを組成物
全量に対して０．５〜７０重量％を添加配合した組成物
がリードスクリューの製作に最適な物性を備えているこ
とを見出し、本発明を完成するに到った。According to the research conducted by the present inventors, liquid crystalline polyester has high strength, high elastic modulus, low molding shrinkage rate, and low coefficient of thermal expansion, and is suitable for manufacturing precision molded products. Because of the strong orientation tendency, these physical properties vary considerably depending on the direction, and it was found that they could not be used as they were for lead screws. Therefore, as a result of further research, the present inventors found that a composition containing liquid crystalline polyester and an inorganic filler added in an amount of 0.5 to 70% by weight based on the total amount of the composition had the optimum physical properties for manufacturing lead screws. The present invention was completed based on the discovery that the present invention has the following features.
即ち本発明は、液晶性ポリエステルと無機フィラーとを
主成分とする組成物からなることを特徴とするリードス
クリューを提供するものである。That is, the present invention provides a lead screw characterized by being made of a composition containing liquid crystalline polyester and an inorganic filler as main components.
本発明で使用する液晶性ポリエステルは、溶融加工性ポ
リエステルで、溶融状態でポリマー分子鎖が規則的な平
行配列をとる性質を有している。分子がこのように配列
した状態をしばしば液晶状態または液晶性物質のネマチ
ック相という。このようなポリマーは、一般に細長く、
偏平で、分子の長袖に沿ってかなり剛性が高く、普通は
同軸または平行のいずれかの関係にある複数の連鎖伸長
結合を有しているようなモノマーから製造される。The liquid crystalline polyester used in the present invention is a melt-processable polyester, and has the property that polymer molecular chains are regularly arranged in parallel in a molten state. The state in which the molecules are arranged in this way is often called the liquid crystal state or the nematic phase of liquid crystal materials. Such polymers are generally elongated;
They are made from monomers that are flat, fairly rigid along the long sleeve of the molecule, and have multiple chain extensions, usually in either coaxial or parallel relationships.
異方性溶融相の性質は、直交偏光子を利用した慣用の偏
光検査法により確認することができる。より具体的には
、異方性溶融相の確認は、Ｌｅｉｔｚ偏光顕微鏡を使用
し、Ｌｅ ｉ ｔｚホットステージにのせた試料を窒素
雰囲気下で４０倍の倍率で観察することにより実施でき
る。上記ポリマーは光学的に異方性である。すなわち、
直交偏光子の間で検査したときに光を透過させる。試料
が光学的に異方性であると、たとえ静止状態であっても
偏光は透過する。The nature of the anisotropic melt phase can be confirmed by conventional polarization testing using crossed polarizers. More specifically, the anisotropic melt phase can be confirmed by using a Leitz polarization microscope and observing a sample placed on a Leitz hot stage at a magnification of 40 times under a nitrogen atmosphere. The polymer is optically anisotropic. That is,
Transmits light when examined between orthogonal polarizers. If the sample is optically anisotropic, polarized light will pass through it even if it is at rest.
上記の如き異方性溶融相を形成するポリマーの構成成分
としては
■ 芳香族ジカルボン酸、脂環族ジカルボン酸の１つま
たはそれ以上からなるもの
■ 芳香族ジオール、脂環族ジオーノペ脂肪族ジオール
の１つまたはそれ以上からなるもの■ 芳香族ヒドロキ
シカルボン酸の１つまたはそれ以上からなるもの
■ 芳香族チオールカルボン酸の１つまたはそれ以上か
らなるもの
■ 芳香族ジチオーノ収芳香族チオールフェノールの１
つまたはそれ以上からなるもの■ 芳香族ヒドロキシア
ミン、芳香族ジアミンの１つまたはそれ以上からなるも
の
等から選ばれ、異方性溶融相を形成するポリマーは
■）■と■からなるポリエステル
■）■だけからなるポリエステル
■）■と■と■からなるポリエステル
■）■だけからなるポリチオールエステル■）■と■か
らなるポリチオールエステル■）■と■と■からなるポ
リチオールエステル■）■と■と■からなるポリエステ
ルアミド■）■と■と■と■からなるポリエステルアミ
ド
等の組み合わせから構成される異方性溶融相を形成する
ポリエステルである。Constituent components of the polymer that forms the anisotropic melt phase as described above include: ■ Consisting of one or more of aromatic dicarboxylic acids and alicyclic dicarboxylic acids ■ Aromatic diols and alicyclic dionope aliphatic diols Consists of one or more aromatic hydroxycarboxylic acids Consists of one or more aromatic thiol carboxylic acids ■ One of aromatic dithioaromatic thiol phenols
Polyesters consisting of one or more of aromatic hydroxyamines and aromatic diamines and forming an anisotropic melt phase are polyesters consisting of ■)■ and ■■) Polyester consisting of only ■ Polyester consisting of ■) ■, ■ and ■ ■) Polythiol ester consisting only of ■ ■) Polythiol ester consisting of ■ and ■ ■) Polythiol ester consisting of ■ and ■ ■) ■ and ■ It is a polyester that forms an anisotropic melt phase composed of a combination of polyester amide consisting of ■), ■, polyester amide consisting of ■, and ■.
更に上記の成分の組み合わせの範鴫には含まれないが、
異方性溶融相を形成するポリマーには芳香族ポリアゾメ
チンが含まれ、かかるポリマーの具体例としては、ポリ
にトリロー２＝メチル−１，４−フェニレンニトリロ
エチリジン−１，４−フ二二しンエチリジン）；ポリに
トジロー２−メチル−１，４−７二しレンニトリ口メチ
リジン−１，４−フェニレンメチリジン）；およびポリ
にトリロー２−クロロ−１，４−フ二二しンニトリロ
メチリジン−１，４−フェニレンメチリジン）が挙げら
れる。Furthermore, although not included in the above combination of ingredients,
Polymers that form an anisotropic melt phase include aromatic polyazomethines; specific examples of such polymers include poly- poly(2-methyl-1,4-7-methyl-1,4-phenylenemethylidine); and poly(2-chloro-1,4-phenylene-methyl) lysine-1,4-phenylenemethylidine).
更に上記の成分の組み合わせの範鴫には含まれないが、
異方性溶融相を形成するポリマーとしてポリエステルカ
ーボネートが含まれる。これは本質的に４−オキシベン
ゾイル単位、ジオキシフェニル単位、ジオキシカルボニ
ル単位及びテレフタロイル単位からなるものがある。Furthermore, although not included in the above combination of ingredients,
Polyester carbonate is included as a polymer that forms an anisotropic melt phase. It may consist essentially of 4-oxybenzoyl units, dioxyphenyl units, dioxycarbonyl units and terephthaloyl units.
本発明で用いるのに好適な異方性溶融相を形成するポリ
マーである上記Ｉ） 、ｎ） 、ＩＩＩ）のポリエステ
ル及び■）のポリエステルアミドは、縮合により所要の
反復単位を形成する官能基を有している有機モノマー化
合物同士を反応させることのできる多様なエステル形成
法により生成させることができる。たとえば、これらの
有機モノマー化合物の官能基はカルボン酸基、ヒドロキ
シル基、エステル基、アシルオキシ基、酸ハロゲン化物
、アミン基などでよい。上記有機モノマー化合物は、溶
融アシドリシス法により熱交換流体を存在させずに反応
させることができる。この方法ではモノマーをまず一緒
に加熱して反応物質の溶融溶液を形成する。反応を続け
ていくと固体のポリマー粒子が液中に懸濁するようにな
る。縮合の最終段階で副生じた揮発物（例、酢酸または
水）の除去を容易にするために真空を適用してもよい。The polyesters (I), n), and III) and the polyesteramide (ii), which are polymers that form an anisotropic melt phase suitable for use in the present invention, contain functional groups that form the required repeating units by condensation. It can be produced by various ester formation methods that allow the organic monomer compounds that are present to react with each other. For example, the functional groups of these organic monomer compounds may be carboxylic acid groups, hydroxyl groups, ester groups, acyloxy groups, acid halides, amine groups, and the like. The above organic monomer compounds can be reacted without the presence of a heat exchange fluid by a melt acidolysis method. In this method, the monomers are first heated together to form a molten solution of the reactants. As the reaction continues, solid polymer particles become suspended in the liquid. Vacuum may be applied to facilitate removal of by-product volatiles (eg acetic acid or water) during the final stage of condensation.
また、スラリー重合法も本発明に用いるのに好適な液晶
性ポリエステルの形成に採用できる。Additionally, slurry polymerization methods can also be employed to form liquid crystalline polyesters suitable for use in the present invention.
この方法では、固体生成物は熱交換媒質中に懸濁した状
態で得られる。In this process, a solid product is obtained in suspension in a heat exchange medium.
上記の溶融アシドリシス法およびスラリー重合法のいず
れを採用するにしても、完全芳香族ポリエステルを誘導
する有機モノマー反応物質は、かかるモノマーのヒドロ
キシル基をエステル化した変性形態で（すなわち、低級
アシルエステルとして）反応に供することができる。低
級アシル基は炭素数約２〜４のものが好ましい。Regardless of whether the melt acidolysis method or slurry polymerization method described above is employed, the organic monomer reactant from which the fully aromatic polyester is derived is in a modified form in which the hydroxyl groups of such monomers are esterified (i.e., as lower acyl esters). ) can be subjected to reaction. The lower acyl group preferably has about 2 to 4 carbon atoms.
好ましくは、かかる有機モノマー反応物質の酢酸エステ
ルを反応に供する。Preferably, an acetate ester of such an organic monomer reactant is subjected to the reaction.
更に溶融アシドリシス法又はスラリー法のいずれにも任
意に使用しうる触媒の代表例としては、ジアルキルスズ
オキシド（例、ジブチルスズオキシド）、ジアリールス
ズオキシド、二酸化チタン、三酸化アンチモン、アルコ
キシチタンシリケート、チタンアルコキシド、カルボン
酸のアルカリおよびアルカリ土類金属塩（例、酢酸亜鉛
〉、ルイス（例、ＢＦ３ ） 、ハロゲン化水素（例、
ＨＣＩ）などの気体状酸触媒などが挙げられる。触媒の
使用量は一般にはモノマーの全重璽に基づいて約０．０
０１〜１重量％、特に約０．０１〜０．２重量％である
。Furthermore, representative examples of catalysts that can optionally be used in either the melt acidolysis method or the slurry method include dialkyltin oxides (e.g., dibutyltin oxide), diaryltin oxides, titanium dioxide, antimony trioxide, alkoxytitanium silicates, titanium alkoxides. , alkali and alkaline earth metal salts of carboxylic acids (e.g. zinc acetate), Lewis (e.g. BF3), hydrogen halides (e.g.
Examples include gaseous acid catalysts such as HCI). The amount of catalyst used is generally about 0.0% based on the total weight of monomer.
01-1% by weight, especially about 0.01-0.2% by weight.
本発明に使用するのに適した液晶性ポリマーは、一般溶
剤には実質的に不溶である傾向を示し、したがって溶液
加工には不向きである。しかし、既に述べたように、こ
れらのポリマーは普通の溶融加工法により容易に加工す
ることができる。特に好ましい完全芳香族ポリマーはペ
ンタフルオロフェノールにはいくらか可溶である。Liquid crystalline polymers suitable for use in the present invention tend to be substantially insoluble in common solvents and are therefore unsuitable for solution processing. However, as previously mentioned, these polymers can be readily processed using conventional melt processing methods. Particularly preferred fully aromatic polymers are somewhat soluble in pentafluorophenol.
本発明で用いるのに好適な液晶性ポリエステルは一般に
重量平均分子量が約２．０００〜２００．０００、好ま
しくは約ｔｏ、 ｏｏｏ〜５０．０００、特に好ましく
は約２０．０００〜２５．０００である。一方、好適な
完全芳香族ポリエステルアミドは一般に分子量が約５、
０００〜５０．０００、好ましくは約１０．０００〜３
０．０００、例えば１５．０００〜１７．０００である
。かかる分子量の測定は、ゲルパーミェーションクロマ
トクラフィーならびにその他のポリマーの溶液形成を伴
わない標準的測定法、たとえば圧縮成形フィルムについ
て赤外分光法により末端基を定量することにより実施で
きる。また、ペンタフルオロフェノール溶液にして光散
乱法を用いて分子量を測定することもできる。Liquid crystalline polyesters suitable for use in the present invention generally have a weight average molecular weight of about 2.000 to 200.000, preferably about 0.000 to 50.000, particularly preferably about 20.000 to 25.000. . On the other hand, suitable fully aromatic polyester amides generally have a molecular weight of about 5,
000 to 50,000, preferably about 10,000 to 3
0.000, for example 15.000 to 17.000. Such molecular weight measurements can be carried out by gel permeation chromatography as well as other standard methods of measuring polymers that do not involve solution formation, such as quantification of end groups by infrared spectroscopy on compression molded films. Alternatively, the molecular weight can be measured using a light scattering method using a pentafluorophenol solution.
上記の液晶性ポリエステルおよびポリエステルアミドは
また、６０℃でペンタフルオロフェノールに０．１重量
％濃度で溶解したときに、少なくとも約２．０ ｄｌ／
ｇ、たとえば約２．０〜１０．０ ｄｌ／ｇの対数粘度
（［、Ｖ、）を一般に示す。The liquid crystalline polyesters and polyesteramides described above also have a concentration of at least about 2.0 dl/w when dissolved in pentafluorophenol at 60°C at a concentration of 0.1% by weight.
g, for example about 2.0 to 10.0 dl/g.
本発明で用いられる異方性溶融相を示すポリマーは、芳
香族ポリエステル及び芳香族ポリエステルアミドが好ま
しく、芳香族ポリエステル及び芳香族ポリエステルアミ
ドを同一分子鎖中に部分的に含むポリエステルも好まし
い例である。The polymer exhibiting an anisotropic melt phase used in the present invention is preferably an aromatic polyester or an aromatic polyester amide, and a polyester partially containing an aromatic polyester or an aromatic polyester amide in the same molecular chain is also a preferred example. .
それらを構成する化合物の好ましい例は、２゜６−ナフ
タレンジカルボン酸、２，６−ジヒドロキシナフタレン
、１，４−ジヒドロキシナフタレン及び６−ヒドロキシ
−２−ナフトエ酸等のナフタレン化１．４．４’−ジフ
二ニルジカルボン酸、４．４’−ジヒドロキシビフェニ
ル等のビフェニル化合物、下記一般式（Ｉ）、（ＩＩ）
又は（ＩＩＩ）で表わされる化合物：
（但し、×：アルキレン（Ｃ！〜Ｃ４）、アルキリデン
、−Ｏ−、−Ｓ、０−１−８Ｏ□−１−８−１−ＣＤ−
より選ばれる基
ｙニー（ｃＨ２）ｎ （ｎ＝１〜４）、−０（ＣＨ２
） 、［Ｉ−（ｎ＝１〜４）より選ばれる基）
ｐ−ヒドロキシ安息香酸、テレフタル酸、ハイドロキノ
ン、ｐ−アミノフェノール及びｐ−フェニレンジアミン
等のパラ位置換のベンゼン化合物及びそれらの核置換ベ
ンゼン化合物（置 ・換基は塩素、臭素、メチ
ル、フェニル、１−フェニルエチルより選ばれる）、イ
ソフタル酸、レゾルシン等のメタ位置換のベンゼン化合
物である。Preferred examples of the compounds constituting them are naphthalenated compounds such as 2°6-naphthalene dicarboxylic acid, 2,6-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, and 6-hydroxy-2-naphthoic acid. - biphenyl compounds such as diphenyl dicarboxylic acid and 4,4'-dihydroxybiphenyl, the following general formulas (I) and (II)
Or a compound represented by (III): (However, ×: alkylene (C! to C4), alkylidene, -O-, -S, 0-1-8O□-1-8-1-CD-
Groups selected from (cH2)n (n=1 to 4), -0(CH2
), [group selected from I-(n=1 to 4)) Para-substituted benzene compounds such as p-hydroxybenzoic acid, terephthalic acid, hydroquinone, p-aminophenol, and p-phenylenediamine, and their nuclear substitutions Benzene compounds (substituents selected from chlorine, bromine, methyl, phenyl, and 1-phenylethyl), isophthalic acid, and meta-substituted benzene compounds such as resorcinol.
又、本発明に使用される液晶性ポリエステルは、上述の
構成成分の他に同−分子鎮中に部分的に異方性溶融相を
示さないポリアルキレンテレフタレートを含むポリエス
テルであってもよい。この場合のアルキル基の炭素数は
２乃至４である。Further, the liquid crystalline polyester used in the present invention may be a polyester containing polyalkylene terephthalate, which does not partially exhibit an anisotropic melt phase, in the same molecular chain, in addition to the above-mentioned components. In this case, the alkyl group has 2 to 4 carbon atoms.
上述の構成成分の内、ナフタレン化合物、ビフェニル化
合物、パラ位置換ベンゼン化合物より選ばれる１種若し
くは２種以上の化合物を必須の構成成分として含むもの
が更に好ましい例である。又、ｐ−位置換ベンゼン化合
物の内、ｐ−ヒドロキシ安息香酸、メチルハイドロキノ
ン及び１−フェニルエチルハイドロキノンは特に好まし
い例である。Among the above-mentioned components, a more preferred example is one containing one or more compounds selected from naphthalene compounds, biphenyl compounds, and para-substituted benzene compounds as an essential component. Among the p-substituted benzene compounds, p-hydroxybenzoic acid, methylhydroquinone and 1-phenylethylhydroquinone are particularly preferred examples.
本発明で用いられるのに特に好ましい異方性溶融相を形
成するポリエステルは、６−ヒドロキシ−２−ナフトイ
ル、２．６−ジヒドロキシナフタレン及び２．６−ジカ
ルボキシナフタレン等のナフタレン部分含有反復単位を
約１０モル％以上の量で含有するものである。好ましい
ポリエステルアミドは上述ナフタレン部分と４−アミ／
フェノール又は１．４−フェニレンジアミンよりなる部
分との反復単位を含有するものである。Particularly preferred anisotropic melt phase forming polyesters for use in the present invention include repeating units containing naphthalene moieties such as 6-hydroxy-2-naphthoyl, 2,6-dihydroxynaphthalene and 2,6-dicarboxynaphthalene. It is contained in an amount of about 10 mol% or more. Preferred polyesteramides include the above-mentioned naphthalene moieties and 4-amino/
It contains a repeating unit with a moiety consisting of phenol or 1,4-phenylenediamine.
尚、上記■）〜■）の構成成分となる化合物の具体例及
び本発明で用いられるのに好ましい異方性溶融相を形成
するポリエステルの具体例については特開昭６１−６９
８６６号公報に記載されている。For specific examples of the compounds constituting the above-mentioned components (1) to (3) and specific examples of polyesters forming an anisotropic melt phase that are preferable for use in the present invention, see JP-A-61-69.
It is described in Publication No. 866.
本発明に使用する無機フィラーとしては、例えば一般の
熱可塑性樹脂及び熱硬化性樹脂に添加される物質で、す
なわち、ガラス繊維、炭素繊維、金属繊維、セラミック
繊維、ボロン繊維、チタン酸カリウム繊維、アスベスト
等の一般無機繊維、炭酸カルシウム、けい酸塩、アルミ
ナ、水酸化アルミニウム、タルク、クレー、マイカ、ガ
ラスフレーク、ガラス粉、ガラスピーズ、石英砂、けい
砂、ウオラストナイト、各種金属粉末、カーボンブラッ
ク、硫酸バリウム、焼石膏等の粉末物質及び炭化けい素
、アルミナ、ボロンナイトライドや窒化けい素等の粉粒
状、板状の無機フィラー、ウィスカーや金属ウィスカー
等が含まれる。Inorganic fillers used in the present invention include, for example, substances added to general thermoplastic resins and thermosetting resins, such as glass fibers, carbon fibers, metal fibers, ceramic fibers, boron fibers, potassium titanate fibers, General inorganic fibers such as asbestos, calcium carbonate, silicate, alumina, aluminum hydroxide, talc, clay, mica, glass flakes, glass powder, glass peas, quartz sand, silica sand, wollastonite, various metal powders, carbon It includes powder substances such as black, barium sulfate, and calcined gypsum, as well as inorganic fillers in the form of powders and plates such as silicon carbide, alumina, boron nitride, and silicon nitride, whiskers, and metal whiskers.
これらの無機フィラーは一種又は二種以上併用混合使用
できるが、弾性率の大きい繊維状物を選択する方が良い
。These inorganic fillers can be used alone or in combination of two or more, but it is better to select a fibrous material with a high elastic modulus.
液晶性ポリエステルとの配合量は、熱膨張率が配合量に
より変わるので、レールその他す−ドスクＩＪ 、−に
付随して使用される部品の材質に応じて適宜選択すれば
良く、通常、組成物全量に対し０．５〜７０重量％、好
ましくは１０〜５０重量％配合される。Since the coefficient of thermal expansion changes depending on the amount of liquid crystalline polyester, the amount of liquid crystalline polyester to be blended may be selected appropriately depending on the material of the parts used in conjunction with the rail, etc. It is blended in an amount of 0.5 to 70% by weight, preferably 10 to 50% by weight based on the total amount.
例えば、相手がアルミニウムであれば主成分とするガラ
ス繊維２０〜５０重量％配合程度で熱膨張率が同じにな
り、ステンレスの場合には主成分とする炭素繊維２０〜
３０重量％配合程度でほぼ熱膨張率が同じになる。For example, if the material is aluminum, the coefficient of thermal expansion will be the same when the main component is 20 to 50% by weight of glass fiber, and in the case of stainless steel, the main component is carbon fiber, which is 20 to 50% by weight.
The coefficients of thermal expansion become almost the same when the content is about 30% by weight.
本発明に用いられる無機フィラーは液晶性ポリエステル
との接着性を高めるため、一般的に用いられる公知の表
面処理剤、収束剤を併用することが可能であり望ましい
。In order to improve the adhesiveness of the inorganic filler used in the present invention to the liquid crystalline polyester, it is possible and desirable to use commonly used known surface treatment agents and binding agents together.
例を示せば、エポキシ系化合物、インシアネート系化合
物、シラン系化合物、チタネート系化合物等の官能性化
合物である。Examples include functional compounds such as epoxy compounds, incyanate compounds, silane compounds, and titanate compounds.
これ等の化合物は予め表面処理又は収束処理を施して用
いるか、又は材料調整の際同時に添加しても良い。These compounds may be used after being subjected to surface treatment or convergence treatment, or may be added at the same time when preparing the material.
これら組成物には、その他通常使用されるグラファイト
、鉱物油、弗素樹脂などの摺動性改善剤等を配合しても
良いことは言うまでもない。It goes without saying that these compositions may also contain other commonly used slidability improvers such as graphite, mineral oil, and fluororesin.
また、一般の熱可塑性樹脂及び熱硬化性樹脂に添加され
る公知の物質、即ち、可塑剤、酸化防止剤や紫外線吸収
剤等の安定剤、帯電防止剤、難燃剤、染料や顔料等の着
色剤及び流動性や離型性の改善のための滑剤、潤滑剤及
び結晶化促進剤（核剤）等も要求性能に応じ適宜使用す
ることができる。In addition, known substances added to general thermoplastic resins and thermosetting resins, such as plasticizers, stabilizers such as antioxidants and ultraviolet absorbers, antistatic agents, flame retardants, and colorants such as dyes and pigments, are also included. A lubricant, a lubricant, a crystallization accelerator (nucleating agent), etc. for improving fluidity and mold releasability can also be used as appropriate depending on the required performance.
更に本発明の液晶性ポリエステルは、本発明の企図する
目的を損なわない範囲で他の熱可塑性樹脂とポリマーブ
レンドをしたものであってもよい。Furthermore, the liquid crystalline polyester of the present invention may be a polymer blend with other thermoplastic resins to the extent that the intended purpose of the present invention is not impaired.
この場合に使用する熱可塑性樹脂は特に限定されないが
、例を示すと、ポリエチレン、ポリプロピレン等のポリ
オレフィン、ポリエチレンテレフタレート、ポリブチレ
ンテレフタレート等の芳香族ジカルボン酸とジオール或
いはオキシカルボン酸等からなる芳香族ポリエステル、
ポリアセクール（ホモ又はコポリマー）、ポリスチレン
、ポリ塩化ビニル、ポリアミド、ポリカーボネー）、Ａ
ＢＳ、ポリオキシフェニレンオキシド、ポリオキシフェ
ニレンスルフィド等を挙げることができる。また、これ
らの熱可塑性樹脂は２種以上混合して使用することがで
きる。またこれらの樹脂には、機械的・電気的・化学的
な性質や難燃性等の諸性質を改善するため、必要に応じ
て種々の添加剤を添加することが可能である。The thermoplastic resin used in this case is not particularly limited, but examples include polyolefins such as polyethylene and polypropylene, and aromatic polyesters made of aromatic dicarboxylic acids and diols or oxycarboxylic acids such as polyethylene terephthalate and polybutylene terephthalate. ,
Polyacecool (homo or copolymer), polystyrene, polyvinyl chloride, polyamide, polycarbonate), A
Examples include BS, polyoxyphenylene oxide, polyoxyphenylene sulfide, and the like. Moreover, these thermoplastic resins can be used in combination of two or more types. Moreover, various additives can be added to these resins as necessary in order to improve various properties such as mechanical, electrical, chemical properties and flame retardancy.
以上上として磁気ヘッドを搭載した場合で説明したが、
同様のリードスクリューはヘッドを代えて光ピツクアッ
プにも使用できるものであって、本発明はその様な記録
、再生方式の如何に拘わらず適用可能である。The above explanation was based on the case where a magnetic head is installed, but
A similar lead screw can also be used for optical pickup by replacing the head, and the present invention is applicable regardless of such recording and reproducing methods.
本発明のリードスクリューは、液晶性ポリエステルのも
つ成型時の寸法精度、高強度、高弾性率、低熱膨張率、
高振動減衰性、低乾湿強度差などの特性をそのまま生か
し、更に熱膨張率を近接する金属部品と同じくしである
ので、設計時に熱膨張に対するゆとりをとる必要がない
ため、精密な設計ができるばかりでなく、製作後の温度
変化、湿度変化による狂いが少ない。The lead screw of the present invention has dimensional accuracy during molding, high strength, high modulus of elasticity, low coefficient of thermal expansion, and
In addition to taking advantage of characteristics such as high vibration damping and low dry and wet strength differences, the coefficient of thermal expansion is the same as that of adjacent metal parts, so there is no need to allow for thermal expansion during design, allowing for precise design. Not only that, but there are fewer deviations due to changes in temperature and humidity after production.
以下実施例を挙げて本発明を更に具体的に説明するが、
本発明はこれに限定されるものではない。The present invention will be explained in more detail with reference to Examples below.
The present invention is not limited to this.
実施例１ 後述する液晶性ポリエステルレジンＡ、 Ｂ。Example 1 Liquid crystalline polyester resins A and B described below.
Ｃ，Ｄ及びＥにガラス繊維を２０重量％（対組成物）に
なるように配合したものを使用して、直径３ｍｍ、長さ
３５ｍｍのリードスクリューを射出成型で製作した。A lead screw with a diameter of 3 mm and a length of 35 mm was manufactured by injection molding using C, D, and E mixed with glass fiber at 20% by weight (based on the composition).
熱膨張率を長さ方向について測定したところ、第１表の
通りであって、アルミニウム（２，４Ｘ１０−’ｃｍ／
ｃｍ／ ｔ） とほぼ同じであった。When the coefficient of thermal expansion was measured in the length direction, it was as shown in Table 1.
cm/t).
第 １ 表
実施例２
レジンＡ、Ｂ、Ｃ，Ｄ及びＥに炭素繊維を３０重量％（
対組成物）配合して、実施例１と同様のリードスクリュ
ーを製作し、熱膨張率を測定した。結果は第２表の通り
であった。Table 1 Example 2 30% by weight of carbon fiber was added to resins A, B, C, D and E (
A lead screw similar to that of Example 1 was prepared by blending the following compositions), and the coefficient of thermal expansion was measured. The results are shown in Table 2.
第 ２ 表
尚、実施例で使用したレジンＡ−Ｅは下記の構成単位を
有するものである。Table 2 The resins A to E used in the Examples have the following structural units.
＝６０／２０／２０ ＝７０／１５／ｌ ５ １＝６０／２０／２０ （以上の数字はモル比）=60/20/20 =70/15/l 5 1=60/20/20 (The above numbers are molar ratios)
第１図は本発明のリードスクリューの説明図である。 １・・・ステッピングモータ ２・・・リードスクリュー ３・・・ヘッドアクチ、エータ− 出願人代理人 古 谷 馨 第 １ 図 FIG. 1 is an explanatory diagram of the lead screw of the present invention. 1...Stepping motor 2...Lead screw 3...Head acti, ether Applicant's agent Kaoru Furutani Figure 1
Claims (1)
ルと無機フィラーとを主成分とする組成物からなること
を特徴とするリードスクリュー。A lead screw characterized in that it is made of a composition whose main components are a thermotropic liquid crystal polyester that exhibits anisotropy when melted and an inorganic filler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29801786A JPS63225756A (en) | 1986-12-15 | 1986-12-15 | Lead screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29801786A JPS63225756A (en) | 1986-12-15 | 1986-12-15 | Lead screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63225756A true JPS63225756A (en) | 1988-09-20 |
Family
ID=17854044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29801786A Pending JPS63225756A (en) | 1986-12-15 | 1986-12-15 | Lead screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63225756A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821895A (en) * | 2014-02-26 | 2014-05-28 | 南通原亚精密机械有限公司 | Screw rod |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147034A (en) * | 1983-02-07 | 1984-08-23 | ヘキスト・セラニーズ・コーポレーション | Small surface abrasion thermotropic liquid crystal polymer blend |
| JPS6169866A (en) * | 1984-09-12 | 1986-04-10 | Polyplastics Co | Composite material composition |
| JPS61285249A (en) * | 1985-06-12 | 1986-12-16 | Polyplastics Co | Resin composition for gear |
-
1986
- 1986-12-15 JP JP29801786A patent/JPS63225756A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147034A (en) * | 1983-02-07 | 1984-08-23 | ヘキスト・セラニーズ・コーポレーション | Small surface abrasion thermotropic liquid crystal polymer blend |
| JPS6169866A (en) * | 1984-09-12 | 1986-04-10 | Polyplastics Co | Composite material composition |
| JPS61285249A (en) * | 1985-06-12 | 1986-12-16 | Polyplastics Co | Resin composition for gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821895A (en) * | 2014-02-26 | 2014-05-28 | 南通原亚精密机械有限公司 | Screw rod |
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