CN102467059B - Cleaning scraper blade - Google Patents
Cleaning scraper blade Download PDFInfo
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- CN102467059B CN102467059B CN201110365041.7A CN201110365041A CN102467059B CN 102467059 B CN102467059 B CN 102467059B CN 201110365041 A CN201110365041 A CN 201110365041A CN 102467059 B CN102467059 B CN 102467059B
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- molecular weight
- average molecular
- polycaprolactone glycol
- cleaning balde
- prepolymer
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Abstract
The invention provides a cleaning scraper blade having excellent abrasiveness and good image display performance in a condition of using polymerizing carbon powder. In the cleaning scraper blade used in an image forming device adopting a static transferring procedure and having a polyurethane elastic body, the polyurethane elastic body is obtained by reacting a fake prepolymer containing isocyanate group, polyatomic alchol and solidifying agent. The fake prepolymer containing isocyanate group is formed by reacting diisocyanate compound with polycaprolactone glycol (P1) having a number-average molar mass (Mw) of 2000 to 4000. The polyatomic alchol compound is formed by mixing the diisocyanate compound with polycaprolactone glycol (P1) having a number-average molar mass (Mw) of 500 to 1000. After the mixing, the number-average molar mass (Mw) is 1500 to 1950.
Description
Technical field
The present invention relates to a kind of cleaning balde removing the remaining carbon dust of photosensitive surface in the electrostatic means image processing system of plain paper copier, plain paper facsimile, laser printer etc.
Background technology
In recent years, in image processing system, in order to make image sharpening, be used as the polymerization carbon dust of ultra-fine carbon dust, when using polymerization carbon dust, due to the mild wear of cleaning balde, can occur clean not thorough, therefore, in cleaning balde, require the abrasion resistance properties more more strict than prior art.
Describe in following patent document 1 and a kind ofly have the cleaning balde false prepolymer and the curing agent containing NCO react obtained polyurethane, the described false prepolymer containing NCO is that the high molecular weight polyols of diisocyanate cpd and molecular weight 1000 ~ 3000 reacts and obtains; Described curing agent is made up of the high molecular weight polyols of molecular weight 1000 ~ 3000 and the low molecular weight polyols of molecular weight 60 ~ 250.But described cleaning balde is not talkative is substantially increase mar proof, actual conditions market require improve abrasion resistance properties further.
Prior art document
Patent document 1: Japanese Patent Laid-Open 05-150697 publication
Summary of the invention
The present invention completes in view of above-mentioned actual conditions, even if its object is to provide a kind of when using polymerization carbon dust, also can not occur for a long time image bad, the cleaning balde of excellent in wear resistance.
Above-mentioned purpose can be completed by the present invention as described below.Namely, cleaning balde of the present invention is cleaning balde that use in a kind of image processing system utilizing static printing program, that have polyurethane elastomer, it is characterized in that, described polyurethane elastomer is make containing the obtained polyurethane of the false prepolymer of NCO, polyol compound and curing agent component reaction; The described false prepolymer containing NCO makes the polycaprolactone glycol (P1) of diisocyanate cpd and number-average molecular weight (Mw) 2000 ~ 4000 react obtained; Described polyol compound is for mixing to the polycaprolactone glycol (P2) of polycaprolactone glycol described in major general (P1) and number-average molecular weight (Mw) 500 ~ 1000, and mixed number-average molecular weight (Mw) is 1500 ~ 1950.
Cleaning balde of the present invention has excellent abrasion resistance properties, even therefore also can not occur that image is bad for a long time when using polymerization carbon dust.The reason that described cleaning balde has excellent abrasion resistance properties is still not clear, but is presumed as follows:
When the polyol compound reacted with the false prepolymer containing NCO is such as the low-molecular-weight polycaprolactone glycol of number-average molecular weight (Mw) about 500 ~ 1000, ballistic properties reduces, and can worry that the clean-up performance of cleaning balde reduces.But, in the present invention, be mix to the polycaprolactone glycol (P2) of major general's polycaprolactone glycol (P1) and number-average molecular weight (Mw) 500 ~ 1000 with polyol compound react containing the false prepolymer of NCO, mixed number-average molecular weight (Mw) is 1500 ~ 1950, therefore in obtained polyurethane, the crystallinity of soft chain segment is disorderly, thus the abrasion resistance properties of polyurethane elastomer improves.Result can think that the abrasion resistance properties of cleaning balde of the present invention improves.
In addition, the preparation method of cleaning balde of the present invention for use in the image processing system utilizing static printing program, the preparation method of the cleaning balde with polyurethane elastomer, it is characterized in that, it comprises prepolymer preparation section and polyurethane preparation section; Described prepolymer preparation section makes the polycaprolactone glycol (P1) of diisocyanate cpd and number-average molecular weight 2000 ~ 4000 react, and preparation is containing the false prepolymer of NCO; Described polyurethane preparation section makes the described false prepolymer containing NCO, polyol compound and curing agent component reaction, prepares polyurethane elastomer; Described polyol compound for the polycaprolactone glycol (P2) to polycaprolactone glycol described in major general (P1) and number-average molecular weight 500 ~ 1000 mix, mixed number-average molecular weight (Mw) is 1500 ~ 1950.
According to the preparation method of above-mentioned cleaning balde, even if can prepare when using polymerization carbon dust, also can not occur for a long time image bad, the cleaning balde of abrasion resistance properties excellence.
Accompanying drawing explanation
Fig. 1 is the wear-resistant sectional area of cleaning balde, the sectional view of the greatest wear degree of depth after representing wear-resistant evaluation.
Detailed description of the invention
Cleaning balde of the present invention have be made up of metallic plate supporter, polyurethane elastomer and bonding supporter and polyurethane elastomer bond layer.In the present invention, described polyurethane elastomer is make containing the obtained polyurethane of the false prepolymer of NCO, polyol compound and curing agent component reaction, and the described false prepolymer containing NCO the polycaprolactone glycol of diisocyanate cpd and number-average molecular weight (Mw) 2000 ~ 4000 is reacted obtain; Described polyol compound is for mixing to the polycaprolactone glycol (P2) of polycaprolactone glycol described in major general (P1) and number-average molecular weight (Mw) 500 ~ 1000, and mixed number-average molecular weight (Mw) is 1500 ~ 1950.
Polycaprolactone polyol can pass through ethylene glycol, 1, ammediol, 1,4-butanediol, 1,5-pentanediol, 1, the straight diols such as 6-hexylene glycol, diethylene glycol, 1,2-PD, 1,3-butanediol, neopentyl glycol etc. as initator containing the glycol etc. of side chain, make 6-caprolactone open loop addition and obtain.The polycaprolactone polyol employing these initators can use known method to prepare.
In the present invention, by using polycaprolactone polyol, the cleaning balde be made up of the polyurethane elastomer of abrasion resistance properties excellence can be prepared.But, in the scope not damaging effect of the present invention, on the basis using polycaprolactone polyol, other polyalcohols can also be used, restriction, does not exemplify lactone PEPA, PPG, PEPA, polycarbonate polyol etc. except polycaprolactone polyol.But, the consumption of these polyalcohols in less than 10 % by weight of polycaprolactone polyol total amount, preferably below 5 % by weight.
Diisocyanate cpd can use the known vulcabond such as toluene di-isocyanate(TDI) (TDI), '-diphenylmethane diisocyanate (MDI).
As curing agent component, can use and well known to a person skilled in the art crosslinking agent and/or chain extender.As crosslinking agent, the polyalcohol of the trifunctionals such as glycerine, trimethylolpropane, triethanolamine, pentaerythrite or four-functional group specifically can be exemplified.In addition, as chain extender, known chain extender in polyurethanes technology field can be used, specifically can exemplify the glycol such as ethylene glycol, 1,3-PD, BDO, diethylene glycol, neopentyl glycol.
Using above-mentioned polycaprolactone polyol, diisocyanate cpd and curing agent component as raw material, polyurethane elastomer can be prepared.Below method for preparing polyurethane elastic body is described.
(1) prepolymer preparation section
First, the polycaprolactone glycol (P1) of diisocyanate cpd and number-average molecular weight (Mw) 2000 ~ 4000 is reacted, preparation is containing the false prepolymer of NCO.For the preparation of the polycaprolactone glycol (P1) of the false prepolymer containing NCO, its number-average molecular weight (Mw) is more preferably 2000 ~ 3000.In addition, the described equivalent proportion (nco index) containing the NCO/OH in the false prepolymer of NCO is preferably 4 ~ 6.
(2) polyurethane preparation section
Then, make, containing the reaction of the false prepolymer of NCO, polyol compound and curing agent component, to prepare polyurethane elastomer by false prepolymer method; The described false prepolymer containing NCO reacts obtained for making diisocyanate cpd and part polycaprolactone glycol (P1), and described polyol compound contains remaining polycaprolactone glycol (P1) and polycaprolactone glycol (P2).Number-average molecular weight (Mw) by mixing to major general's polycaprolactone glycol (P1) with the polycaprolactone glycol (P2) of number-average molecular weight (Mw) 500 ~ 1000, thus is adjusted to 1500 ~ 1950 by the polyol compound reacted with the false prepolymer containing NCO.The number-average molecular weight (Mw) of mixed polyol compound preferably 1500 ~ 1800.In addition, in the curing reaction of the reaction stoste composition containing the above-mentioned false prepolymer containing NCO, polyol compound and curing agent component, the equivalent proportion (nco index) of NCO/OH is preferably 0.95 ~ 1.2, is more preferably 1.05 ~ 1.10.
Cleaning balde of the present invention such as can by having preparation method's preparation of following molding procedure.
<1> sheet forming method
1) reaction stoste composition is cast into thin plate, makes it react and be solidified into raw material thin plate, this raw material thin plate of cutting (cutting operation) becomes scraper plate.In sheet forming, usually use centrifugal casting.
2) by the base material (metal fittings etc.) be installed to for being installed to by scraper plate on image processing system such as bonding, blade member is become.
<2> straight forming method
As required, arrange for scraper plate being installed to the base material (metal fittings etc.) on image processing system in a mold, described mould has the cavity of scraper plate shape to be formed; Casting reaction stoste composition in molding cavity, is molded into scraper plate or the scraper plate blade member integrated with base material.
Embodiment
Below, the embodiment etc. specifically demonstrating structure of the present invention and effect is described.Further, the assessment item in embodiment etc. is as described below to be measured.
(1) abrasion resistance properties
In following, obtained polyurethane elastomer bonded on the metal fittings of regulation, becomes cleaning balde.This cleaning balde is installed to employ polymerization carbon dust, on the full color printer IPSIO SP C811 (production of Ricoh (Ricoh) company) of static printing program mode (PM), carry out abrasion resistance properties evaluation.Evaluate 23 DEG C, carry out under 54%Rh environment.
Abrasion resistance properties is evaluated as after forming 15000 images continuously, remove cleaning balde, 3 positions, place of two ends and central portion are blocked along cross direction, thus the cross section of the abutting part abutted with photoreceptor can be seen, observe cross section with digit microscope VHX100 (production of Keyemce (Keyence) company), according to the wearing and tearing sectional area of cleaning balde (μm
2) and the greatest wear degree of depth (μm) evaluate.The results are shown in the hypomere of table 1.
(mensuration of wearing and tearing sectional area, the greatest wear degree of depth)
By the cleaning balde after above-mentioned evaluation, block along cross direction at 3 positions, place of two ends and central portion, thus the cross section of the abutting part abutted with photoreceptor can be seen, observe cross section with digit microscope VHX100 (production of Keyemce (Keyence) company).Wearing and tearing sectional area for Fig. 1 edge by the triangle A wearing and tearing formed area (μm
2) mean value, the greatest wear degree of depth is the maximum of the Y (μm) of Fig. 1.T is the thickness of cleaning balde.
(2) hardness
The hardness (°) of polyurethane is with JIS-K 6253 for foundation, carries out measuring at 23 DEG C.
(3) least
Least (%) of polyurethane is with JIS-K 6255 for foundation, carries out measuring at 23 DEG C.
(4) mechanical properties
The Young's modulus (MPa) of polyurethane and 25% modulus (M25) (MPa) take JIS-K6254 as foundation, 100% modulus (M100) (MPa), 300% modulus (M300) (MPa), hot strength (MPa) and percentage elongation (%) are for foundation with JIS-K 6251, tearing strength (N/mm) is for foundation with JIS-K 6252, permanent elongation (%) is with JIS-K 6273 for foundation, measures respectively at 23 ± 3 DEG C.
(5) number-average molecular weight
Number-average molecular weight GPC (gel permeation chromatography) measures, and converts according to polystyrene standard.
GPC device: Shimadzu Seisakusho Ltd. produces, LC-10A
Chromatographic column: Polymer Laboratories company produce, by three chromatographic columns (PLgel, 5 μm,
), (PLgel, 5 μm,
) and (PLgel, 5 μm,
) coupling
Flow: 1.0ml/min
Concentration: 1.0g/l
Sample size: 40 μ l
Column temperature: 40 DEG C
Eluent: oxolane
Embodiment 1 ~ 5, comparative example 1 ~ 2
With the false prepolymer of the proportioning preparation described in table 1 epimere containing NCO.Make the described false prepolymer containing NCO, containing the polyol compound and the curing agent component reaction that remain polycaprolactone glycol (P1) and polycaprolactone glycol (P2), prepare polyurethane elastomer by false prepolymer method.And, adjusting by mixing polycaprolactone glycol (P1) and polycaprolactone glycol (P2) with polyol compound react containing the false prepolymer of NCO, making the Mw=1500 in the Mw=1750 in the Mw=1900 in embodiment 1, embodiment 2, the Mw=1500 in embodiment 3, embodiment 4, Mw=1750 in embodiment 5.
The raw polyol used is as follows.
PCL220N: the polycaprolactone glycol (number-average molecular weight 2000, hydroxyl value 56.1, Daicel (Daicel) chemical industry) using straight diol as initator
PCL205: the polycaprolactone glycol (number-average molecular weight 530, hydroxyl value 214, Daicel (Daicel) chemical industry) using straight diol as initator
PCL210N: the polycaprolactone glycol (number-average molecular weight 1000, hydroxyl value 112.2, Daicel (Daicel) chemical industry) using straight diol as initator
BD:1,4-butanediol (chain extender)
TMP: trimethylolpropane (crosslinking agent)
MDI:4,4 '-'-diphenylmethane diisocyanate
Table 1
From the results shown in Table 1, compared with the cleaning balde of comparative example 1 ~ 2, the cleaning balde of embodiment 1 ~ 5 is excellent especially in abrasion resistance properties.
Claims (2)
1. a cleaning balde, its for use in the image processing system utilizing static printing program, the cleaning balde with polyurethane elastomer, it is characterized in that, described polyurethane elastomer is make containing the obtained polyurethane of the false prepolymer of NCO, polyol compound and curing agent component reaction; The described false prepolymer containing NCO makes the polycaprolactone glycol (P1) of diisocyanate cpd and number-average molecular weight (Mw) 2000 ~ 4000 react obtained; Described polyol compound is for mixing to the polycaprolactone glycol (P2) of polycaprolactone glycol described in major general (P1) and number-average molecular weight (Mw) 500 ~ 1000, and mixed number-average molecular weight (Mw) is 1500 ~ 1800.
2. the preparation method of a cleaning balde, described cleaning balde for use in the image processing system utilizing static printing program, the cleaning balde with polyurethane elastomer, it is characterized in that, the method comprises prepolymer preparation section and polyurethane preparation section;
Described prepolymer preparation section makes the polycaprolactone glycol (P1) of diisocyanate cpd and number-average molecular weight 2000 ~ 4000 react, and preparation is containing the false prepolymer of NCO;
Described polyurethane preparation section makes the described false prepolymer containing NCO, polyol compound and curing agent component reaction, prepares polyurethane elastomer; Described polyol compound for the polycaprolactone glycol (P2) to polycaprolactone glycol described in major general (P1) and number-average molecular weight 500 ~ 1000 mix, mixed number-average molecular weight (Mw) is 1500 ~ 1800.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010257029A JP5615138B2 (en) | 2010-11-17 | 2010-11-17 | Cleaning blade |
| JP2010-257029 | 2010-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102467059A CN102467059A (en) | 2012-05-23 |
| CN102467059B true CN102467059B (en) | 2015-04-29 |
Family
ID=46070817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110365041.7A Active CN102467059B (en) | 2010-11-17 | 2011-11-17 | Cleaning scraper blade |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5615138B2 (en) |
| CN (1) | CN102467059B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6191062B1 (en) * | 2015-12-25 | 2017-09-06 | Nok株式会社 | Cleaning blade |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001253927A (en) * | 2000-03-13 | 2001-09-18 | Toyo Tire & Rubber Co Ltd | Cleaning blade |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2539317B2 (en) * | 1992-04-03 | 1996-10-02 | バンドー化学株式会社 | Manufacturing method of cleaning blade for electrophotographic copying machine |
| JP2942183B2 (en) * | 1995-11-24 | 1999-08-30 | バンドー化学株式会社 | Method and apparatus for manufacturing blade for electrophotographic apparatus |
| CA2161824A1 (en) * | 1994-11-16 | 1996-05-17 | Tatuya Oshita | Polyurethane and molded article comprising the same |
| US6641627B2 (en) * | 2001-05-22 | 2003-11-04 | 3M Innovative Properties Company | Abrasive articles |
| JP2006017996A (en) * | 2004-07-01 | 2006-01-19 | Hokushin Ind Inc | Cleaning blade member |
| US20070031753A1 (en) * | 2005-08-05 | 2007-02-08 | Hokushin Corporation | Polyurethane member for use in electrophotographic apparatus |
| JP4900796B2 (en) * | 2005-12-19 | 2012-03-21 | シンジーテック株式会社 | Cleaning blade member |
| JP4818945B2 (en) * | 2007-01-29 | 2011-11-16 | バンドー化学株式会社 | Blade for electrophotographic apparatus and method for manufacturing the same |
| JP5055047B2 (en) * | 2007-07-09 | 2012-10-24 | キヤノン化成株式会社 | Mold and mold manufacturing method for electrophotographic apparatus |
| JP2009063993A (en) * | 2007-08-10 | 2009-03-26 | Canon Chemicals Inc | Electrophotographic cleaning blade |
-
2010
- 2010-11-17 JP JP2010257029A patent/JP5615138B2/en not_active Expired - Fee Related
-
2011
- 2011-11-17 CN CN201110365041.7A patent/CN102467059B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001253927A (en) * | 2000-03-13 | 2001-09-18 | Toyo Tire & Rubber Co Ltd | Cleaning blade |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5615138B2 (en) | 2014-10-29 |
| CN102467059A (en) | 2012-05-23 |
| JP2012108314A (en) | 2012-06-07 |
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