CN1585013A - Guide unit of disc driving device - Google Patents
Guide unit of disc driving device Download PDFInfo
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- CN1585013A CN1585013A CN 200410058839 CN200410058839A CN1585013A CN 1585013 A CN1585013 A CN 1585013A CN 200410058839 CN200410058839 CN 200410058839 CN 200410058839 A CN200410058839 A CN 200410058839A CN 1585013 A CN1585013 A CN 1585013A
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- polyacetal resin
- guiding parts
- compound
- dish guiding
- fatty acid
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Abstract
Provided are disk guide components by which a disk is not finely blemished by repeating insertion and ejection of the disk. The disk guide components of a disk drive device is formed by using a polyacetal resin composition formed by mixing 0.05 to 10 pts.wt. fatty acid ester (B) of a 5-32C fatty acid and glycerol or a polyglycerol to 100 pts.wt. polyacetal resin (A).
Description
Technical field
The present invention relates to the dish guiding parts in disk drive devices such as CD, DVD.More particularly, relate to the dish guiding parts that forms with specific resin material.
Background technology
In the disk drive device of fluting (slot-in) type, being provided with that to be used to lead main be the insertion of indicator of matrix and/or the guiding parts that withdraws from the polycarbonate.Such dish guiding parts is to be used for the feed cam roller concerted action dish being clipped in therebetween and the parts carried, and when dish inserted and/or withdraws from, it was unstable to suppress dish by the periphery near side (ns) of pinning dish, had the help dish along insertion of sliding or the effect of withdrawing from.
In the past, such dish guiding parts forms with resin material, directly uses to former state the particularly polyacetal resin of general purpose grade mostly.
Moreover the raw-material document of referring to formation dish guiding parts seldom only sees that having put down in writing the dish guiding parts is the document (spy opens 2003-59151 communique, [0006] hurdle) of resinous degree.
Summary of the invention
, the dish guiding parts of the resin material formation of in the past using though its mechanism may not be clear, during coiling insertion repeatedly or withdrawing from, makes wound fine in the dribbling sometimes.This wound, it or not record surface at dish, but at its opposing face, promptly near the dish periphery of so-called label surface, take place easily, therefore think that the possibility that the record replication performance that coils is impacted especially is little, but, for example because of human error etc. insert upside down/when withdrawing from, also have record surface that the possibility of damage takes place.In addition, these damages be infringement commodity value and appearance, require its improvement.
The inventor is for the polyacetal resin composite system dish guiding parts that obtains adapting to such requirement and the result of lucubrate, find: comprise the dish guiding parts that the resin combination of the combination of the polyacetal resin composite that cooperated specific fatty acid ester or specific polyacetal resin forms, generation to the damage of polycarbonate system dish is considerably less, thereby has finished the present invention.
The present invention is a kind of dish guiding parts of open flume type disk drive device, it is characterized in that, adopt the polyacetal resin composite formation be included in the fatty acid that cooperates carbon number 5-32 in the 100 weight portion polyacetal resins (A) and fatty acid ester (B) the 0.05-10 weight portion of glycerine or polyglycereol.
The present invention still is a kind of dish guiding parts of open flume type disk drive device, it is characterized in that, adopts to be included in the polyacetal resin composite formation that cooperates branching or crosslined polyacetal resin (A2) 0.1-20 weight portion in the linear polyacetal resins of 100 weight portions (A1).
Description of drawings
Fig. 1 is from the insertion of dish or the dish guiding parts schematic section seen of exit axis.
Fig. 2 is the schematic section of the insertion of indicating panel or the state when withdrawing from.
Fig. 3 is used to estimate the synoptic diagram of the abrasive evaluation of dish being used test film.
Fig. 4 is the synoptic diagram of expression to the abrasive evaluation method of dish.
Each symbol among the figure is: 1 ... dish guiding parts, 2 ... indicator, 3 ... rubber system roller (roll).
Embodiment
Below describe the present invention in detail.The dish guiding parts 1 of the open flume type disk drive device among the present invention roughly has the such cross sectional shape of Fig. 1, when indicator 2 inserts and/or withdraws from, with rubber system roller 3 grades jointly with the such form of Fig. 2 indicator that leads.Such dish guiding parts generally is the shape of one as shown in Figure 1, but makes combined shaped, and the structure that forms the periphery of the contact portion that only leads and coil also can.
Feature of the present invention is, adopts the polyacetal resin composite that is included in the fatty acid that cooperates carbon number 5-32 in the 100 weight portion polyacetal resins (A) and fatty acid ester (B) the 0.05-10 weight portion of glycerine or polyglycereol or is included in that the linear polyacetal resins of 100 weight portions (A1) are middle to cooperate the polyacetal resin composite of branching or crosslined polyacetal resin (A2) 0.1-20 weight portion to form such dish guiding parts.The effect of the guiding parts that such structure constitutes is remarkable especially when indicator is matrix with the polycarbonate resin.
At first, polyacetal resin used in the present invention (A) is with oxygen methylene (CH
2O-) be the macromolecular compound of main formation unit, can be the polyoxymethylene homopolymer that only comprises the repetitive of oxygen methylene basically, beyond the oxygen methylene, also contain any one of other polyformol copolymers (comprising block interpolymers) that constitute unit, terpolymers on a small quantity, in addition, not only molecule is linear, also can be that molecule has branching, cross-linked structure.
Usually, homopolymer by anhydrous formaldehyde polymerization or make as the polymerization of the cyclic trimer De trioxane of formaldehyde.Usually come the thermal decomposition stabilization by end-capped.
Interpolymer is at about 85-99.9%-CH
2Disperse to exist in the O-repeating group to use general formula:
(in the formula, R
1And R
2From the group that comprises hydrogen, low alkyl group and halogen replacement low alkyl group, select respectively, in addition, R
3From the group that comprises methylene, oxygen methylene, low alkyl group and haloalkyl substituted methylene and low alkyl group and haloalkyl replacement oxygen methylene, select, m is the integer of 0-3, the base of each low alkyl group carbon number 1-2) Biao Shi base constitutes, weight-average molecular weight is 5000 or above macromolecular compound, usually, by with formaldehyde or with general formula (CH
2O)
n[wherein n be 3 or above integer] cyclic oligomer body, for example trioxane and cyclic ether compound and/or the copolymerization of cyclic formals compound of formaldehyde of expression make, and removes the l fraction of end usually by hydrolysis, thereby to the thermal decomposition stabilization.As cyclic ether that is used for copolymerization or cyclic formals, for example use oxirane, 1,3-dioxolanes, two sweet formals, 1,4-butylene glycol formal etc.In addition, beyond mentioned component, and also can with the composition of adjusting molecular weight.As carry out the composition that molecular weight is adjusted, list can not forming unstable terminal chain-transferring agent, promptly have dimethoxym ethane, methoxy methyl acetal, dimethoxy dimethoxym ethane, trimethoxy dimethoxym ethane, oxygen methylene-di-n-butyl ether and so on a kind of compound of alkoxy or 2 kinds or more than.In addition, ter-polymers is made by further add multi-functional compounds such as 2-glycidyl ether compound and polymerization in above-mentioned copolymerization.
Secondly, in the present invention, use the fatty acid of carbon number 5-32 and the fatty acid ester of glycerine or polyglycereol as (B) composition.As the resin material that forms dish guiding parts of the present invention, only in polyacetal resin, cooperated under the situation of fatty acid ester of so specific qualification, the damage of indicator is improved significantly, this is should be amazing.
As the example of the fatty acid that constitutes such fatty acid ester, list unsaturated fatty acids such as saturated fatty acid such as caproic acid, sad, undecanoic acid, lauric acid, tridecanoic acid, myristic acid, palmitic acid, stearic acid, behenic acid, lignoceric acid, cerinic acid, montanic acid, melissic acid or oleic acid, elaidic acid, linoleic acid, leukotrienes, arachidonic acid, brassidic acid, sinapic acid, castor oil acid etc.For effect of the present invention, preferably lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid etc.
As the example of polyglycereol, be the 2-10 aggressiveness of glycerine, the 2-5 aggressiveness of glycerine preferably.
Wherein, from dish sliding capability aspect is considered,, preferably list glyceryl monostearate, glycerol distearate, glycerol tristearate, Gan oil Dan behenic acid ester, glycerine single acetyl monostearate, glycerin mono-fatty acid ester etc. as the ester of glycerine.As the ester of polyglycereol, list polyglycereol monostearate, polyglycereol distearate, polyglycereol monolaurate, polyglycereol monoleate etc.
In the present invention, the addition of such fatty acid ester (B) is the 0.05-10 weight portion with respect to polyacetal resin 100 weight portions.When equivalent is less than 0.05 weight portion, can not expect the damaging effect of improving, in addition, opposite equivalent is during more than 10 weight portions, and often the character as the polyacetal of matrix resin is compromised significantly.Especially preferably cooperate the 0.1-5 weight portion.
Secondly, the linear polyacetal resin (A1) of Shi Yonging is with oxygen methylene (CH in the present invention
2O-) be the macromolecular compound of the molecular structure of straight chain basically that has of main formation unit, can be the polyoxymethylene homopolymer, also contain any one of other interpolymers (comprising block interpolymers) that constitute unit beyond the oxygen methylene on a small quantity, but especially preferably use interpolymer.
In addition, as interpolymer, the preferred interpolymer that trioxane (a) 99.9-95.0 weight % and compound (b) the 0.1-5.0 weight % copolymerization selected from simple function cyclic ether compound and simple function cyclic formals compound are obtained, its melt index (MI) is preferably the 1-50g/ branch.Moreover the melt index (MI) of stipulating in the present application is to measure under the condition of 190 ℃ of load 2160g according to ASTM D-1238.
The main material trioxane (a) that uses in the manufacturing as the preferred above-mentioned polyacetal interpolymer of linear polyacetal resin (A1), it is the cyclic trimer of formaldehyde, usually in the presence of acidic catalyst by formalin reaction is obtained, its is adopted method such as distillation make with extra care and use.Be used for polymerization De trioxane (a), impurity such as preferred not moisture as far as possible, methyl alcohol, formic acid.
In addition, for making the compound of from simple function cyclic ether compound and simple function cyclic formals compound, selecting (b) that the polyacetal interpolymer uses with above-mentioned trioxane (a) copolymerization, be in 1 molecule, to have 1 cyclic ether unit or cyclic formals unit, can not form the compound of branched structure by ring-opening polymerization, list oxirane, 1, the 3-dioxolanes, tetrahydrofuran, ト リ オ キ セ パ Application, ethylene glycol acetal, the propylene glycol formal, the diglycol formal, the triethylene glycol formal, 1,4-butylene glycol formal, 1,5-pentanediol formal, 1,6-hexanediol formal etc.Wherein, the preferred use is selected from oxirane, 1,3-dioxolanes, 1,4-butylene glycol formal and diglycol formal a kind or 2 kinds or more than.
The manufacture method of so linear polyacetal resin (A1) of Shi Yonging is not particularly limited in the present invention, the manufacture method manufacturing known to can adopting in the past.For example under the situation of polyacetal interpolymer, can adjust agent by in above-mentioned De trioxane (a) and compound (b), adding an amount of molecular weight, the use cationic polymerization catalyst carries out cationic polymerization and obtains, after the polymerization, carry out the processing that inactivation is handled, instability is terminal of catalyzer, the stabilization processes that the employing stabilizing agent carries out etc. and get final product.
Secondly, branching of Shi Yonging or crosslined polyacetal resin (A2) in the present invention are at oxygen methylene (CH by making the composition copolymerization that can form branched structure or cross-linked structure
2O-) introduce branching or cross-linked structure in the repetitive, wherein, preferred Shi trioxane (a) 99.89-89.0 weight %, compound (b) the 0.1-10.0 weight % that selects from simple function cyclic ether compound and simple function cyclic formals compound and polyfunctional glycidyl ether's compound (c) 0.01-1.0 weight % copolymerization obtain, its melt index (MI) be 0.1-10g/ divide for well.
At this, the compound (b) of in the manufacturing of branching or crosslined polyacetal resin (A2), use De trioxane (a), from simple function cyclic ether compound and simple function cyclic formals compound, selecting, be as in the explanation of above-mentioned linear polyacetal resin (A1), be described in detail compound.The compound (b) that uses in the manufacturing of branching or crosslined polyacetal resin (A2) both can be identical with the compound that uses in the manufacturing of linear polyacetal resin (A1) (b), also can be different separately.
In addition, as the polyfunctional glycidyl ether's compound (c) that in the manufacturing of branching or crosslined polyacetal resin (A2), uses, can use and have 2 or above glycidyl ether, but the compound that preferably in 1 molecule, has 3-4 glycidyl ether, particularly, list trihydroxymethylpropanyltri diglycidyl ether, T 55 and pentaerythrite four glycidol ethers as particularly preferred compound.
The manufacture method of such branching of Shi Yonging or crosslined polyacetal resin (A2) is not particularly limited in the present invention.The branching or the crosslined polyacetal resin (A2) that for example comprise trioxane (a), the compound of from simple function cyclic ether compound and simple function cyclic formals compound, selecting (b) and polyfunctional glycidyl ether's compound (c), can adjust agent by in these monomer components, usually adding an amount of molecular weight, the use cationic polymerization catalyst carries out cationic polymerization and obtains, after the polymerization, carry out the processing that inactivation is handled, instability is terminal of catalyzer, the stabilization processes that the employing stabilizing agent carries out etc. and get final product.
As described above, the dish guiding parts of open flume type disk drive device of the present invention, it is characterized in that, adopt to cooperate the polyacetal resin composite of branching or crosslined polyacetal resin (A2) 0.1-20 weight portion to form in the linear polyacetal resins of 100 weight portions (A1) that comprise as described above.The use level of preferred branched or crosslined polyacetal resin (A2) is the 0.2-10 weight portion.The use level of branching or crosslined polyacetal resin (A2) is Duoed still few generation that all is difficult to suppress to the damage of indicator than this.
In addition, in above-mentioned composition, select the ratio of melt index (MI) to satisfy the linear polyacetal resin (A1) of following formula and being combined as of branching or crosslined polyacetal resin (A2).
0.02≤MI
B/MI
A≤1.5
(MI
A, MI
BThe melt index (MI) of representing resin (A1), resin (A2) respectively)
And the preferred linear polyacetal resin (A1) of use and the melt index (MI) and the cooperation ratio thereof of branching or crosslined polyacetal resin (A2) adjusted is so that the melt index (MI) (MI of polyacetal resin composite
AB) with the melt index (MI) (MI of linear polyacetal resin (A1)
A) ratio satisfy following formula.
0.7≤MI
A/MI
AB≤1.4
(MI
A, MI
ABThe melt index (MI) of representing resin (A1), resin combination respectively)
Use polyacetal resin composite in the present invention, handle linear polyacetal resin (A1) and branching or crosslined polyacetal resin (A2) by melting mixing basically and modulate.Treatment conditions wish 180-270 ℃ temperature at least melting mixing 30 seconds or more than.The concrete form of modulation method does not limit especially, uses the extruder of single shaft or twin shaft or other melting mixing device to mix necessary composition, make shaping with pellet etc., adopt the modulation method of known equipment and method to be suitable for.
In polyacetal resin composite of the present invention, cooperate as required and the various stabilizing agents of selecting for well.As stabilizing agent, can list hindered phenol based compound, nitrogen-containing compound, alkaline metal or alkaline-earth metal oxyhydroxide, inorganic salts, carboxylate etc. wantonly a kind or 2 kinds or more than.And, only otherwise damage purpose effect of the present invention, can add colorant, lubricant, release agent, antistatic agent, surfactant or high-molecular organic materials such as a kind or 2 kinds or above general adjuvant, for example dyestuff, pigment, inorganic or organically fibrous, powder shaped, tabular filling agent etc. as required at thermoplastic resin.
Embodiment
Illustrate in greater detail the present invention by the following examples, but the present invention is not limited thereto.Moreover, estimate and adopt following method to carry out.
[to the polycarbonate resin dish damaging]
At first, be shaped evaluation shown in Figure 3 with test film (Φ 5mm * 15mm, pointed shape are the hemispherical of r=2.5mm) with the resin material (polyacetal resin composite) that will estimate.
Secondly, use Suzuki formula friction wear testing machine, dispose above-mentioned evaluation as shown in Figure 4 with test film and polycarbonate resin CD-R dish (maxell makes MQ-74), make it to slide 1000 seconds under load 9.8N, rotating speed 10mm/s, the naked eyes evaluation is to the damage of CD-R dish.Judgement is carried out with 5 grades according to following benchmark.
1: can't see the generation of slide mark, streak etc.
2: produce atomic little slide mark, streak
3: a part of position at sliding part produces slide mark, streak
4: whole slide mark, the streak of producing of sliding part
5: sliding part integral body produces slide mark, streak intensely
Embodiment 1-7, comparative example 1-5
In polyacetal resin (Port リ プ ラ ス チ ッ Network ス (strain) system, trade name ジ ュ ラ コ Application (registered trademark) M90), cooperate fatty acid glyceride (B-1 to B-5) shown below with the ratio shown in the table 1, with the extruder melting mixing of 200 ℃ of cylinder temperatures, modulated granular composition.Then, use injection molding machine shaping evaluation test film shown in Figure 3, estimated damage the polycarbonate resin dish by this granular composition.
In addition,, do not cooperate under the situation of fatty acid glyceride,, estimated damage the polycarbonate resin dish for the situation of the ester (B-6 to B-9) that cooperates alcohol beyond the glycerine and fatty acid forming test sheet similarly for relatively.Table 1 shows these results.
Moreover (B) composition of use is as follows.
B-1: Gan oil Dan behenic acid ester (reason is ground PVC ミ Application (strain) system, リ ケ マ-Le B-100)
B-2: glyceryl monostearate (reason is ground PVC ミ Application (strain) system, リ ケ マ-Le S-100)
B-3: glycerol tristearate (reason is ground PVC ミ Application (strain) system, VT)
B-4: glycerin mono-fatty acid ester (reason is ground PVC ミ Application (strain) system, OL-100E)
B-5: glycerine single acetyl monostearate (reason is ground PVC ミ Application (strain) system, Port エ system G-508)
B-6: stearyl stearate (Japanese grease (strain) system, ユ ニ ス -M9676)
B-7: ethylene glycol bisthioglycolate montanate (Japan ペ ト ロ ラ イ ト (strain) system, LUZAWAX-EP)
B-8: glycol distearate (reason is ground PVC ミ Application (strain) system, preproduction)
B-9: pentaerythritol tetrastearate (Japanese grease (strain) system, ユ ニ ス -H476)
Table 1
| Resin is formed (weight portion) | Evaluation result | |||
| (A) polyacetal resin | (B) fatty acid ester kind | Use level | Damaging grading to the PC dish | |
| Embodiment 1 | ????100 | ????B-1 | ????0.5 | ????2 |
| Embodiment 2 | ????100 | ????B-1 | ????1 | ????1 |
| Embodiment 3 | ????100 | ????B-1 | ????3 | ????1 |
| Embodiment 4 | ????100 | ????B-2 | ????1 | ????1 |
| Embodiment 5 | ????100 | ????B-3 | ????1 | ????2 |
| Embodiment 6 | ????100 | ????B-4 | ????1 | ????1 |
| Embodiment 7 | ????100 | ????B-5 | ????1 | ????1 |
| Comparative example 1 | ????100 | ?????- | ????- | ????5 |
| Comparative example 2 | ????100 | ????B-6 | ????1 | ????4 |
| Comparative example 3 | ????100 | ????B-7 | ????1 | ????4 |
| Comparative example 4 | ????100 | ????B-8 | ????1 | ????4 |
| Comparative example 5 | ????100 | ????B-9 | ????1 | ????5 |
Embodiment 8-16, comparative example 6-9
In polyacetal resin (Port リ プ ラ ス チ ッ Network ス (strain) system, trade name ジ ュ ラ コ Application (registered trademark) M90), cooperate polyglyceryl fatty acid ester (B-10 to B-16) shown below with the ratio shown in the table 2, with the extruder melting mixing of 200 ℃ of cylinder temperatures, modulated granular composition.Then, use injection molding machine shaping evaluation test film shown in Figure 3, estimated damage the polycarbonate resin dish by this granular composition.
In addition, for relatively,, implemented damage evaluation to the polycarbonate resin dish for the situation of the lubricant (B-17 to B-20) that has cooperated other forming test sheet similarly.Table 2 shows these results.
Moreover (B) composition of use is as follows.
B-10: two glyceryl monostearates (reason is ground PVC ミ Application (strain) system, リ ケ マ-Le S-72)
B-11: triglycerin monostearate (reason is ground PVC ミ Application (strain) system, リ ケ マ-Le AF-70)
B-12: four glyceryl monostearates (reason is ground PVC ミ Application (strain) system, Port エ system J-4081)
B-13: SY-Glyster MSW 750 (reason is ground PVC ミ Application (strain) system, Port エ system J-0081H)
B-14: four glycerin mono-fatty acid esters (reason is ground PVC ミ Application (strain) system, Port エ system J-4581)
B-15: SY-Glyster MO 750 (reason is ground PVC ミ Application (strain) system, Port エ system J-0381)
B-16: DECAGLYCERYL MONOLAURATE (reason is ground PVC ミ Application (strain) system, Port エ system J-0021)
B-17: polyoxyl 40 stearate (Japanese grease (strain) system, ノ ニ オ Application S-40)
B-18: ethylenebisstearamide (flower king (strain) system, カ オ-ワ ッ Network ス EB-G)
B-19: dimethyl silicone polymer (eastern レ ダ ウ コ-ニ Application グ シ リ コ-Application (strain) system, SH-200)
B-20: Tissuemat E (Sanyo changes into (strain) system, サ Application ワ ッ Network ス 165-P)
Table 2
| Resin is formed (weight portion) | Evaluation result | |||
| (A) polyacetal resin | (B) fatty acid ester or lubricant kind | Use level | Damaging grading to the PC dish | |
| Embodiment 8 | ????100 | ????B-10 | ????1 | ????1 |
| Embodiment 9 | ????100 | ????B-11 | ????0.5 | ????2 |
| Embodiment 10 | ????100 | ????B-11 | ????1 | ????1 |
| Embodiment 11 | ????100 | ????B-11 | ????3 | ????1 |
| Embodiment 12 | ????100 | ????B-12 | ????1 | ????1 |
| Embodiment 13 | ????100 | ????B-13 | ????1 | ????1 |
| Embodiment 14 | ????100 | ????B-14 | ????1 | ????1 |
| Embodiment 15 | ????100 | ????B-15 | ????1 | ????2 |
| Embodiment 16 | ????100 | ????B-16 | ????1 | ????2 |
| Comparative example 6 | ????100 | ????B-17 | ????1 | ????4 |
| Comparative example 7 | ????100 | ????B-18 | ????1 | ????5 |
| Comparative example 8 | ????100 | ????B-19 | ????1 | ????5 |
| Comparative example 9 | ????100 | ????B-20 | ????1 | ????5 |
Embodiment 17-23, comparative example 10-12
[melt index (MI) (MI)]
According to ASTM D-1238,190 ℃, the load 2160g condition under measure.
[copolymerization composition]
The polyacetal resin of modulation is dissolved among the hexafluoroisopropanol d2, measures by 1H-NMR and confirmed its copolymerization composition.
[manufacturing of linear polyacetal resin (A1) and branching crosslined polyacetal resin (A2)]
Use is had logical heat (cold) matchmaker's chuck by the outside, the cross section has the tube of the overlapping shape of 2 circular portions, continous way hybrid reaction machine with the turning axle formation of being with oar, make 2 turning axle rotations that have oar with 150rpm respectively, simultaneously, under the situation of linear polyacetal resin (A1), add trioxane (a) with the ratio shown in the table 3, with the compound of from simple function cyclic ether compound and simple function cyclic formals compound, selecting (b), in addition under the situation of branching crosslined polyacetal resin (A2), add trioxane (a) with the ratio shown in the table 4, the compound of from simple function cyclic ether compound and simple function cyclic formals compound, selecting (b) and polyfunctional glycidyl ether's compound (c), and supply with the dimethoxym ethane of adjusting agent as molecular weight continuously, adding supply continuously is the catalyzer boron trifluoride of 0.005 weight % with respect to trioxane, carries out bulk polymerization.The resultant of reaction of discharging from the polymerization machine passes to disintegrating machine on one side apace, Yi Bian join in 60 ℃ the aqueous solution of the triethylamine that contains 0.05 weight %, with catalyst deactivation.And, after separation, washing, the drying, obtain thick polyacetal resin (linear polyacetal resin and branching or crosslined polyacetal resin).
Then, to this thick polyacetal resin, the 5 weight % aqueous solution of adding triethylamine are 3 weight %, [3-(3 for pentaerythrite-four, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] 0.3 weight %, with biaxial extruder 210 ℃ of melting mixing, remove l fraction, obtain granular polyacetal resin (linear polyacetal resin A1-1 to A1-3 (table 3) and branching or crosslined polyacetal resin A2-1 to A2-3 (table 4)).
The polymkeric substance of these polyacetal resins is formed and melt index (MI) (MI) is shown in table 3, table 4.In the table simple number is as follows.
(b): composition
DO:1, the 3-dioxolanes
BF:1,4-butylene glycol formal
(c): composition
TMPTGE: trihydroxymethylpropanyltri diglycidyl ether
Cooperate linear polyacetal resin (A1) and branching or the crosslined polyacetal resin made from said method (A2) with the ratio shown in the table 5,210 ℃ of melting mixing, obtain granular polyacetal resin composite with biaxial extruder.Use this polyacetal resin composite evaluation test film shown in Figure 3 that is shaped, estimated damaging to the polycarbonate resin dish.In the table, MI
ABIt is the melt index (MI) of polyacetal resin composite.
In addition, for relatively, implemented evaluation similarly for the situation of not adding branching crosslined polyacetal resin (B).The results are shown in table 5.
Table 3
| Polyacetal resin No. | Trioxane (a) (wt%) | Compound (b) | Melt index (MI) MI A(g/10 branch) | ||
| Kind | ??(wt％) | ||||
| Production Example 1 | ????A1-1 | ????98.3 | ????DO | ????1.7 | ????2.5 |
| Production Example 2 | ????A1-2 | ????99.0 | ????DO | ????1.0 | ????2.5 |
| Production Example 3 | ????A1-3 | ????98.3 | ????BF | ????1.7 | ????2.4 |
Table 4
| Polyacetal resin No. | Trioxane (a) (wt%) | Compound (b) | Compound (c) | Melt index (MI) MI B(g/10 branch) | |||
| Kind | ???(wt％) | Kind | ??(wt％) | ||||
| Production Example 4 | ??A2-1 | ????98.2 | ????DO | ????1.7 | ?TMPTGE | ????0.1 | ????1.5 |
| Production Example 5 | ??A2-2 | ????98.2 | ????DO | ????1.7 | ?TMPTGE | ????0.1 | ????0.9 |
| Production Example 6 | ??A2-3 | ????98.0 | ????DO | ????1.7 | ?TMPTGE | ????0.3 | ????0.9 |
Table 5
| Linear polyacetal resin (A1) | Branching. crosslined polyacetal resin (A2) | Polyacetal resin composite | Damaging grading to the PC dish | |||||||
| Polyacetal resin No. | ????MI A(g/10 branch) | Use level (weight portion) | Polyacetal resin No. | ????MI B(g/10 branch) | Use level (weight portion) | ?MI B/MI A | ????MI AB(g/10 branch) | ??MI A/MI AB | ||
| Embodiment 17 | ????A1-1 | ????2.5 | ????97 | ??A2-1 | ????1.5 | ????3 | ????0.6 | ????2.4 | ????1.0 | ????1 |
| Embodiment 18 | ????A1-1 | ????2.5 | ????95 | ??A2-1 | ????1.5 | ????5 | ????0.6 | ????2.3 | ????1.1 | ????1 |
| Embodiment 19 | ????A1-1 | ????2.5 | ????92 | ??A2-1 | ????1.5 | ????8 | ????0.6 | ????2.3 | ????1.1 | ????1 |
| Embodiment 20 | ????A1-2 | ????2.5 | ????95 | ??A2-1 | ????1.5 | ????5 | ????0.6 | ????2.3 | ????1.1 | ????2 |
| Embodiment 21 | ????A1-3 | ????2.4 | ????95 | ??A2-1 | ????1.5 | ????5 | ????0.63 | ????2.2 | ????1.1 | ????2 |
| Embodiment 22 | ????A1-1 | ????2.5 | ????95 | ??A2-2 | ????0.9 | ????5 | ????0.36 | ????2.2 | ????1.1 | ????1 |
| Embodiment 23 | ????A1-1 | ????2.5 | ????95 | ??A2-3 | ????0.9 | ????5 | ????0.6 | ????2.1 | ????1.2 | ????2 |
| Comparative example 10 | ????A1-1 | ????2.5 | ????100 | ????- | ?????- | ????- | ?????- | ?????- | ?????- | ????4 |
| Comparative example 11 | ????A1-2 | ????2.5 | ????100 | ????- | ?????- | ????- | ?????- | ?????- | ?????- | ????4 |
| Comparative example 12 | ????A1-3 | ????2.4 | ????100 | ????- | ?????- | ????- | ?????- | ?????- | ?????- | ????4 |
Claims (12)
1. the dish guiding parts of an open flume type disk drive device, it is characterized in that, the employing polyacetal resin composite forms, and this polyacetal resin composite is included in the fatty acid of cooperation carbon number 5-32 in the 100 weight portion polyacetal resins (A) and fatty acid ester (B) the 0.05-10 weight portion of glycerine or polyglycereol.
2. the dish guiding parts of an open flume type disk drive device, it is characterized in that, the employing polyacetal resin composite forms, and this polyacetal resin composite is included in and cooperates branching or crosslined polyacetal resin (A2) 0.1-20 weight portion in the linear polyacetal resins of 100 weight portions (A1).
3. the dish guiding parts of putting down in writing according to claim 1, wherein, fatty acid ester (B) for be selected from glyceryl monostearate, glycerol distearate, glycerol tristearate, Gan oil Dan behenic acid ester, glycerin mono-fatty acid ester and glycerine single acetyl monostearate a kind or 2 kinds or more than.
4. the dish guiding parts of putting down in writing according to claim 1, wherein, fatty acid ester (B) for be selected from polyglycereol monostearate, polyglycereol distearate, polyglycereol monolaurate and polyglycereol monoleate a kind or 2 kinds or more than.
5. the dish guiding parts of putting down in writing according to claim 4, wherein, fatty acid ester (B) is the fatty acid ester as the polyglycereol of glycerine 2-10 aggressiveness.
6. the dish guiding parts of being put down in writing according to claim 1 or 2, wherein, the dish guiding parts is that to be used to lead with the polycarbonate resin be the insertion of indicator of matrix and/or the dish guiding parts that withdraws from.
7. the dish guiding parts of being put down in writing according to claim 1 or 2, wherein, disk drive device is a vehicle mounted.
8. the dish guiding parts of putting down in writing according to claim 2, wherein, branching or crosslined polyacetal resin (A2) obtain trioxane (a) 99.89-89.0 weight %, compound (b) the 0.1-10.0 weight % that selects and polyfunctional glycidyl ether's compound (c) 0.01-1.0 weight % copolymerization from simple function cyclic ether compound and simple function cyclic formals compound.
9. the dish guiding parts of being put down in writing according to Claim 8, wherein, polyfunctional glycidyl ether's compound (c) has 3 to 4 glycidyls.
10. the dish guiding parts of being put down in writing according to Claim 8, wherein, polyfunctional glycidyl ether's compound (c) is selected from trihydroxymethylpropanyltri diglycidyl ether, T 55 and pentaerythrite four glycidol ethers.
11. the dish guiding parts of putting down in writing according to claim 2, wherein, linear polyacetal resin (A1) obtains Jiang trioxane (a) 99.9-95.0 weight % with from compound (b) the 0.1-5.0 weight % copolymerization that simple function cyclic ether compound and simple function cyclic formals compound are selected.
12. the dish guiding parts of putting down in writing according to claim 2, wherein, the melt index (MI) (MI of linear polyacetal resin (A1)
A) be the 1-50g/ branch, the melt index (MI) (MI of branching or crosslined polyacetal resin (A2)
B) be the 0.1-10g/ branch, press the ratio (MI of melt index (MI)
B/ MI
A) mode that satisfies 0.02-1.5 selects linear polyacetal resin (A1) and branching or crosslined polyacetal resin (A2).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP282288/2003 | 2003-07-30 | ||
| JP2003282288A JP4316320B2 (en) | 2003-07-30 | 2003-07-30 | Disc guide parts for disc drives |
| JP282289/2003 | 2003-07-30 | ||
| JP2003282289A JP4316321B2 (en) | 2003-07-30 | 2003-07-30 | Disc guide parts for disc drives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1585013A true CN1585013A (en) | 2005-02-23 |
Family
ID=34621835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410058839 Pending CN1585013A (en) | 2003-07-30 | 2004-07-30 | Guide unit of disc driving device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1585013A (en) |
| TW (1) | TW200511213A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905036B (en) * | 2005-07-26 | 2010-07-21 | 日本电产株式会社 | Chucking device and brushless motor and disc driving device in which the chucking device is installed |
| US7913268B2 (en) | 2006-05-29 | 2011-03-22 | Nidec Corporation | Motor and manufacturing method of the same |
| US7917918B2 (en) | 2006-06-20 | 2011-03-29 | Nidec Corporation | Brushless motor having chucking mechanism, and disk driving device having the brushless motor |
-
2004
- 2004-07-29 TW TW093122670A patent/TW200511213A/en unknown
- 2004-07-30 CN CN 200410058839 patent/CN1585013A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905036B (en) * | 2005-07-26 | 2010-07-21 | 日本电产株式会社 | Chucking device and brushless motor and disc driving device in which the chucking device is installed |
| US8095946B2 (en) | 2005-07-26 | 2012-01-10 | Nidec Corporation | Optical disk motor and disc driving device installing the optical disk motor |
| US7913268B2 (en) | 2006-05-29 | 2011-03-22 | Nidec Corporation | Motor and manufacturing method of the same |
| US7917918B2 (en) | 2006-06-20 | 2011-03-29 | Nidec Corporation | Brushless motor having chucking mechanism, and disk driving device having the brushless motor |
| US9087544B2 (en) | 2006-06-20 | 2015-07-21 | Nidec Corporation | Brushless motor having chucking mechanism, and disk driving device having the brushless motor |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200511213A (en) | 2005-03-16 |
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Open date: 20050223 |