CN100500391C - Method of treating razor blade cutting edges - Google Patents
Method of treating razor blade cutting edges Download PDFInfo
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- CN100500391C CN100500391C CNB2005800024062A CN200580002406A CN100500391C CN 100500391 C CN100500391 C CN 100500391C CN B2005800024062 A CNB2005800024062 A CN B2005800024062A CN 200580002406 A CN200580002406 A CN 200580002406A CN 100500391 C CN100500391 C CN 100500391C
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- slasher
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Abstract
Methods treating razors blade cutting edges having an adherent polyfluorocarbon coated thereon are described. The coated razor blade edges are treated with a solvent, which partially removes the coating from the razor blade edge. Addition of an antioxidant to the solvent improves the effectiveness of the treatment.
Description
Technical field
The present invention relates to slasher, more particularly relate to the method for handling slasher.
Background of invention
With coating such as polytetrafluoroethylene (PTFE), be also referred to as " telomer " sometimes and handle slasher, with the cutting force that reduces to use this slasher required.Yet in order to obtain the best comfortableness that shaves, this coating is blocked uply coated under many circumstances, especially when shaving for the first time.Thick coating when shaving on the blade is pushed rearward, and the performance that shaves after causing shaving for the first time improves.Therefore, the effort of having done is intended to obtain making the effect of insert coating attenuation with simulation " to pusher " coating reliable and repeatablely.
In some cases, use solvent selectivity ground to remove partial coating, so that the thin layer of the razor characteristic can improve that especially shave the first time time to be provided.These methods are disclosed in the United States Patent (USP) 5,985,459 of authorizing people such as Kwiecien.This patent is mentioned coating is thinned to a certain degree, no longer as seen it is being amplified on 900 times the microphoto, but still stay the shallow layer with good machinability matter.The thickness of advising this coating can be so that it be by chemical bonding.
Summary of the invention
The present invention relates in " shaving for the first time " cutting, show the razor blade cutting edges that improves.As mentioned above, make a kind of method of insert coating attenuation be to use solvent to remove partial coating, on blade, stay uniform thin layer.It has been observed by the present inventors that, in solvent solution, comprise antioxidant attenuation is improved that because antioxidant helps to improve the stability of solvent, this can make that the attenuation of insert coating has uniformity when handling blade in enormous quantities.
In one aspect, characteristics of the present invention are to handle the method for the slasher of polyfluohydrocarbon coating.Described method comprises makes the slasher of polyfluohydrocarbon coating contact with the solution of solvent and antioxidant, thereby removes the polyfluohydrocarbon coating from slasher top.
In some cases, polyfluohydrocarbon comprises polytetrafluoroethylene (PTFE).
In some cases, antioxidant comprises phenol moieties, for example the phenol moieties of formula I
Formula I.
Antioxidant can comprise the organophosphor part, for example the organophosphor part of formula II
Formula II.
Antioxidant can comprise lactone and/or azanol.The concentration of antioxidant can be less than about 0.1% (for example, less than about 0.05% or less than about 0.01%) in the solvent.Antioxidant can be stable under more than or equal to the temperature of solvent boiling point.
In some cases, solvent comprises at least a in perfluoro alkane, perfluorinated cycloalkanes, perfluor aromatic hydrocarbons or its oligomer (as, the isomers of dodecafluorocyclohexane, eight naphthalene fluorides, perfluoro lignocerane, perfluoro ten tetanthrenes, perfluoro perhydrogenate benzyl naphthalene, perfluoro ten tetanthrenes, higher boiling oligomeric side-products when producing perfluoro ten tetanthrenes or perfluoro polyether).In some cases, described solvent comprises having general formula C
14F
23(C
14F
22)
nC
14F
23Perfluoro perhydrophenanthrene oligomer, wherein n is 0,1 or 2, or perfluoro ten tetanthrenes.In some cases, solvent comprises multiple antioxidant.
In some cases, this method is also included within to remove behind the contact slasher and desolvates.For example, can come except that desolvating by blade being immersed wash solution.The temperature of described wash solution can be near the boiling point of this wash solution.In some cases, described wash solution comprises perfluoro (2-n-butyl hydrogenation furans).In some cases, the boiling point of solvent is greater than the solution temperature of polyfluohydrocarbon in the solvent.For example, the slasher useable solvents is being lower than this solvent boiling point but is handling under the temperature of polyfluohydrocarbon solution temperature in more than or equal to solvent.Alternatively, the slasher useable solvents be higher than this solvent boiling point and more than or equal to solvent in handle under the temperature of polyfluohydrocarbon solution temperature.
In some cases, be coated on the slasher, subsequently this dispersion be heated to the temperature that is enough to this polyfluohydrocarbon is sticked on the slasher and make slasher coated with polyfluohydrocarbon by dispersion with polyfluohydrocarbon.Can be by for example dispersion being sprayed on the slasher, or slasher immersed in the dispersion described dispersion is coated on the slasher.
In some cases, slasher comprises blade, and this blade is coated with polyfluohydrocarbon.
In some cases, described method comprises this solution of filtration.
In some cases, described method comprises that the slasher that polyfluohydrocarbon is applied contacts with multiple antioxidant.Described antioxidant can comprise and for example contain phenyl moiety and contain the organophosphor part.The example of above-mentioned antioxidant comprises the antioxidant of formula I and II
Formula I formula II.
In some cases, the antioxidant of formula I and formula II exists with 1/2 ratio.
In some cases, the temperature of described solution (between about 250 ℃ and about 350 ℃, between about 260 ℃ and about 300 ℃, or being about 280 ℃ for example) between about 200 ℃ and 400 ℃.
In some cases, described solution stands the pressure between (for example, between about 280kPa and 420kPa (40psi and 60psi)) between about 210kPa and the 830kPa (30psi and 120psi).
On the other hand, characteristics of the present invention are a kind of methods of handling the slasher of polyfluohydrocarbon coating, and it is that 1/2 the formula I and the solution of formula II compound contact that described method comprises the slasher of polyfluohydrocarbon coating and perfluoro perhydrophenanthrene and ratio.
Formula I formula II.
The details of one or more embodiments of the present invention are set forth in following accompanying drawing and explanation.By reading explanation and accompanying drawing and claims, other characteristics of the present invention and advantage will be apparent.
Summary of drawings
Fig. 1 is with containing before the antioxidant solvent handles the microphoto of the razor blade cutting edges that polyfluohydrocarbon is handled.
Fig. 2 and 3 is razor blade cutting edges microphotos after usefulness contains the processing of antioxidant solvent that polyfluohydrocarbon is handled.
Detailed Description Of The Invention
Method with polyfluohydrocarbon coating razor blade cutting edges is known in the art, and for example is disclosed in Authorize in the United States Patent (USP) 5,263,256 of Trankiem. Yet these methods make tool usually The blade (referring to Fig. 1) that relatively thick initial polymer coating is arranged. This can cause shaving for the first time The time out-of-proportion high cutting force. A method improving the characteristic that shaves for the first time is to make polymerization The attenuation of thing coating for example uses solvent to remove most of coating. As mentioned above, the method is open In United States Patent (USP) 5,985, in 459, the complete disclosure of this patent is incorporated herein by reference.
It has been observed by the present inventors that, add antioxidant in the solvent and can improve these polyfluohydrocarbon is coated with The repeatability of layer attenuation method. The lubricity of telomer coating depends in part on the branch of polymer Therefore the son amount needs to use different molecular weight, and these molecular weight depend on for special-purpose (for example, men's slasher is with respect to lady's slasher) required lubricity. In addition, telomer The lubricity of coating can be subjected to the impact of the hard coat of slasher. No matter the molecular weight of telomer With the hard coat of slasher how, add antioxidant and all improved repeating of processing conditions The property.
Process the method that has applied blade:
Process with suitable solvent and antioxidant (or multiple antioxidant) and to be coated with polyfluohydrocarbon Blade, removing excessive polyfluohydrocarbon from blade, thereby provide thinner polyfluohydrocarbon layer. (ginseng See Fig. 2 and 3. ) blade is coated and process with solvent, such as United States Patent (USP) 5,985, institute in 459 State. Suitable solvent and machined parameters will be discussed in detail below.
Described antioxidant can comprise phenol stabilizer, such as Irganox B-215 (supplier Ciba Special Chem). Phenol antioxidant is fabulous hydrogen donor, and industrial for surely Decide polymer. For example, hindered phenol makes ROO by following reaction*Free radical deactivates:
Because the phenoxy group free radical that produces can adopt multiple form stable, therefore highly stable. Phenol The example of class antioxidant is provided by following table 1:
Table 1: phenol antioxidant
Alternatively or except comprising phenol moieties, antioxidant can comprise that also organic phosphatization closes Thing. These compounds can be used for the decomposition of hydroperoxides, and prevent that hydroperoxides from decomposing Become to have extremely highly active alkoxyl and hydroxyl radical free radical. Some of organophosphor anti-oxidant compounds Example comprises listed those in the following table 2.
Table 2: organophosphor anti-oxidant compounds
Lactone and hydroxylamine compound also can be used as antioxidant. These compounds especially can be used for clearly Except alkyl diradical, thereby suppress the autoxidation circulation. In the situation of hypoxgia, alkyl certainly By the stablized remarkable effect of basic scavenger to polymer. In many cases, lactone is anti-oxidant Agent and phenol antioxidant and phosphite antioxidant are united use, thereby even at low concentration Also can provide higher performance down. Some examples of lactone and azanol antioxidant comprise replacement Listed those in benzofuranone and the following table 3.
Table 3: benzofuranone and azanol antioxidant
Usually, the amount in the antioxidant adding solvent solution is by weight less than about 1.0% (example As, less than about 0.5%, 0.4%, 0.3%, 0.2%, 0.1%, 0.05%, 0.04%, 0.03%, 0.02%, 0.01% or 0.005%).
Antioxidant is added in the solvent so that antioxidant/solvent solution to be provided. Then, usually will Solution filter to be removing oarse-grained antioxidant substance, thus reduce in the whipping process may because of The possibility of the damage razor blade cutting edges that bulky grain causes. Usually, use coarse filter, filter size Be about 30 microns particle. In some cases, join in the solution at the slasher with coating Before, with non-activity gas such as argon or this solution of purging with nitrogen gas.
Reacting in the situation of carrying out under the inert gas conditions, can be when finishing dealing with, for example When solvent solution is exposed to air, add antioxidant.
Then slasher is put into solution and stirring, thus remove portion polyfluohydrocarbon coating.
The temperature and pressure for the treatment of conditions is with the different of slasher coating, solvent and antioxidant Change. In some cases, processing is at high temperature carried out. In some cases, temperature is lower than The boiling point of solvent but be higher than the solution temperature of polyfluohydrocarbon. For example, temperature can be higher than about 100 ℃, Be higher than about 200 ℃, or be higher than about 300 ℃. Usually reaction temperature is lower than about 500 ℃, is lower than approximately 400 ℃, or be lower than about 300 ℃. Be lower than in temperature in the situation of solvent boiling point, reaction condition is logical Often comprise atmospheric pressure.
In some cases, temperature is in or is higher than the boiling point of solvent. Be in or be higher than in temperature In the situation of the boiling point of solvent, usually use high pressure.
The process of the blade of solvent processing polyfluohydrocarbon coating is in the required temperature of dissolve polymer, namely Carry out in the solution temperature scope as defined above. In some cases, need use to increase Pressure reduces the loss of solvent. In these cases, the processing of slasher is at the pressure of increase Carry out under (for example, about 280kPa is to about 840kPa (about 40psi is to about 120psi)).
Usually, razor is handled in solvent solution and is less than about 30 minutes, for example is less than 25 minutes, or is less than 20 minutes.Usually, razor is handled greater than about 1 second, for example greater than about 5 seconds, 10 seconds, 30 seconds, 1 minute, 2 minutes, 5 minutes, about 10 minutes or about 15 minutes.Reaction time is depended on multiple factor, includes but not limited to solvent, temperature, pressure and blade number.
Usually, select the stable antioxidant/solvent combination under the polymer coating solution temperature under solvent boiling point or in the solvent of antioxidant wherein.The solution temperature of polymer coating can change with pressure in the boiling point of solvent and the solvent.Therefore, can antioxidant/group of solvents be fashionable when selecting, also will consider use increased pressure.
The embodiment of the solvent property that needs is provided below:
(1) polyfluohydrocarbon solvability
Use fusing point to reduce to determine solvability.Use Seiko Instrument DSC-220 differential scanning calorimeter (DSC), in nitrogen, measure the reduction of fusing point in melting point polymer and the solvent with 10 ℃/minute firing rate.Fusing point is the smallest peaks on the fusion endothermic curve.In sealing aluminum or stainless steel disc or glass ampoule bottles, use about 5mg PTFE/ solvent to study the reduction of fusing point.Show that the liquid with the reduction of PTFE fusing point is considered to solvent.Fusing point reduces the lower boundary of having determined solution temperature.
(2) solvent compatibility under the polyfluohydrocarbon solution temperature
In some cases, solvent is liquid under solution temperature.In other words, the boiling point of solvent is higher than processing temperature, and fusing point is lower than solution temperature.Certainly, can control these physical attributes by changing tonnage.Though can use increased pressure and can in manufacture process, use increased pressure, for the solvent of liquid does not need to use high-tension apparatus, therefore in some cases, can reduce the processing cost of described process under environment for use pressure and the solution temperature.Under the situation of using high pressure, the critical-temperature of solvent is usually above processing temperature.
(3) low polarity
In disclosed method, usually use to have the low polarity or the molecule of nonpolarity degree of functionality most preferably.For example, these molecules comprise nonpolar aliphatic series, ring-type or aromatics perfluoroparaffin; Yet, also can use the low-molecular-weight (LMW) of hexafluoropropene epoxides, the homopolymers of fluorine end-blocking.
Solvent, antioxidant and polymer should be stablized under treatment temperature.Stirring will increase the dissolution velocity of polymer along blade.Other has two factor affecting dissolution velocities: the interfacial surface area between (1) polymer and the solvent is high more, and speed is just fast more and (2) polymer molecular weight is high more, and polymer concentration is just high more, and dissolution velocity is just slow more.Dissolving the needed time will change with the particular polymers of selecting and solvent and above-mentioned other factors (comprising antioxidant).The specific embodiment that solvent is handled occurs in an embodiment.
The example of solvent comprises perfluoro alkane, perfluorinated cycloalkanes, perfluor aromatic compound and their oligomer.In some cases, many PFPEs (PFPE) are also effective.Term used herein " perfluorinated cycloalkanes " is meant saturated cyclic compound, and it can comprise and condenses or the uncondensed ring.In addition, fluoridized cycloalkane can be replaced by perfluoroalkyl or perfluorinated alkylidene.We are meant saturated side chain or straight chain carbochain so-called " perfluoroalkyl ".
Saturated perfluoroparaffin with aliphatic circulus and high-critical temperature provides the resolvability of PTFE under minimum temperature and pressure usually.Fluoridized solvent can be available from for example Gainesville, the PCR of Fla, Inc..Dodecafluorocyclohexane (C
6F
12), eight naphthalene fluoride (C
10F
8) and perfluoro lignocerane (n-C
24F
50) can be available from Aldrich Chemical Co..Perfluoro ten tetanthrene (C
14F
24), be commonly referred to the perfluoro perhydrophenanthrene, can trade name Flutec PP11 available from F2 Chemicals, Preston Lancashire, England.The perfluoro perhydrogenate benzyl naphthalene (C of commodity Flutec PP25 by name
17F
30) mixture of isomers can be available from F2 Chemicals, Preston Lancashire, England.FlutecPP11 (C
14F
23(C
14F
22)
nC
14F
12, n=0,1 and 2 wherein) and higher boiling oligomeric side-products in producing also can be available from DuPont, and it is the total mixture of perfluoroparaffin.The roughly boiling spread of these components is 280 ℃ to 400 ℃.When dissolving MP1100, MP1600, LW1200 or Vydax board PTFE from blade, use about 10 to the 200 seconds time of temperature between 270 ℃ and 340 ℃ usually.
Term perfluoro polyether used herein (PFPE) is meant and comprises-(CF
2-CFR-O-)
nThe perfluorochemical of key, wherein R=F, CF
3These compounds are sometimes referred to as perfluoroalkyl ether (PFAE) or perfluoro poly alkyl ether (PFPAE).The preferred polymers chain is saturated fully, and only containing element carbon, oxygen and fluorine; There is not hydrogen.
The validity of attenuation method for example can use the wool felt cutter method of testing to measure, and this method is cut the cutting force that the required power of wool felt is measured blade by measuring each blade.The cutting force of blade can be in time prolongation and change, for example because the wearing and tearing of blade or since the coating on the blade be removed.Therefore, make blade pass wool felt cutter 500 times, and on logger, measure the power of each cutting.
In some cases, after blade is handled with solvent, this blade is further handled to remove all excessive solvents.This can be by finishing in the wash solution that blade is immersed solvent.
Usually, blade washs under the temperature near the wash solution boiling point.By Fluorinert FC-75 board perfluoro (the 2-n-butyl hydrogenation furans) solvent of 3M manufacturing and the HFC-43 board of being made by DuPont 1,1,1,2,3,4,4,5,5,5 ,-Decafluoropentane all is available wash solutions.
Usually, wash solution easily and separated from solvent so that wash solution is renewable.From solvent, remove dissolving polyfluohydrocarbon (as, PTFE) solvent and/or PTFE can be regenerated.Polyfluohydrocarbon and solvent separate available distillation or other known method of art technology people realizes.
Unless otherwise, all percentages as herein described and ratio are all by weight.
Term used herein " razor blade cutting edges " comprises the cutting point and the face of blade.The applicant recognizes that whole blade can mode as herein described apply.Yet such bag is coated, and not to be considered to the present invention necessary.Slasher comprises all types known in the art as described in the present invention.For example, stainless steel blade is used always.Many other commercial slashers also comprise the chromium/platinum interlayer between steel blade and the polymer.This class interlayer is being sputtered on the blade surface before the polymer coating.In addition, blade material can apply before polymer coating with as United States Patent (USP) 5,142, and 785 and 5,232, imitative brill crystalline carbon (DLC) coating described in 568.
The coating blade
The blade of polyfluohydrocarbon coating can be made with any method known in the art.For example, blade can apply with the polyfluohydrocarbon dispersion.Then with the blade heating of coating dispersing decentralized medium, and with the polyfluohydrocarbon sintering on blade.
The example of polyfluohydrocarbon comprises MP1100, MP1200, MP1600 and the LW1200 board polytetrafluorethylepowder powder of being made by DuPont.
The polyfluohydrocarbon dispersion comprises 0.05% to 5% (weight) usually, preferred 0.7% to 1.2% (weight) be dispersed in polyfluohydrocarbon in the dispersant media.Be incorporated into this polymer in the stream that flows or directly be blended in the reservoir of stirring homogenize then.In the time of in being injected into the stream that flows, use static mixer downstream usually.
Decentralized medium comprises one or more fluorocarbons (for example Freon brand of DuPont production), water, VOC (as isopropyl alcohol) or supercritical CO usually
2
Dispersion can be coated on the blade in any suitable manner, for example by with dispersion dipping or be sprayed on the blade.Under the situation of using nebulization, can use electrostatic field to combine with sprayer to increase deposition efficiency.Usually, after coating, heat this coating to improve adhesion.
Embodiment
Embodiment 1:
About 1500 coatings are deposited in the improvement stirring the tip of the axis of a 350ml Parr4560 microreactor (washer) with the blade of LW-1200.In this washer, pack into then 2/3 Flutec PP11 solvent and IRGANOX B-215 (0.01%) antioxidant.By syringe with argon gas with the flow velocity purge of per hour 620 liters (22scfh) 5 minutes.With entire equipment sealing, the gas outlet by gas tank was with the other purge of argon gas 5 minutes.And then, reach 250 ℃ up to it with this washer sealing and heating.Start shaft and, reach 273 ℃ up to temperature with the speed rotation of 80rpm.Then temperature is remained on 273 ℃ of about 90 seconds.At this moment, the pressure in the closed chamber reaches 280kPa to 420kPa (40psi to 60psi).Stop heating, and the introducing air cools down washer.When reaching 260 ℃, temperature stops then stirring.When being about 60 ℃, temperature takes out blade.
Embodiment 2:
The solution of antioxidant (IRGANOX B-215) and solvent (FLUTEC PP11) is added pressure vessel (adding to approximately half-full).Then with about 5 minutes of nitrogen or this solution of argon gas purge.Behind the purge solution, ingot PTFE coating slasher is inserted in this pressure vessel, slasher is immersed in antioxidant/solvent solution.Once more with about 3 minutes of nitrogen or this solution of argon gas purge.Increase to about 280kPa (40psi) then with this sealing for pressure vessels, and with pressure.The temperature of solvent increases to about 280 ℃, stirs the slasher of this ingot coating simultaneously.Stir blade and be less than about 2 minutes.After finishing, the temperature in the reaction vessel is cooled down, subsequently release pressure.In some cases, blade further passes through washing step to remove the solvent of any remnants.
Following table 4 has been described the cutting force of three kinds of slashers when cutting for the first time, the 5th are cut and cut for the 500th time.Use three kinds of different hard coating material A, B and C to describe slasher.As can be seen, use Flutec
TMThe slasher that solvent and antioxidant IRGANOX B-215 handle is than only using Flutec
TMThe slasher that solvent is handled has the more consistent first time and the 5th cutting force.In addition, when adding antioxidant, all observe lower all the time L on all coatings
500Value makes and uses Flutec
TMSolvent and antioxidant are than only using F1utec
TMSolvent has more repeatability.Be not bound by theory, it is believed that antioxidant has improved the stability of solvent, improved the repeatability of blade attenuation then.Therefore, the use antioxidant provides a kind of manufacture method of improvement, because this combination makes various slashers obtain bigger uniformity and repeatability.
Table 4: with the Flutec that contains and do not contain antioxidant
TM
The comparison of the slasher that solvent is handled
*Irganox B-215 antioxidant
*L
500, poundBe the mean value of the cutting force between the 500th time and the 505th time cutting.
Many embodiment of the present invention have been described.Yet should be appreciated that under the condition that does not deviate from spirit and scope of the invention and can carry out various modifications.Therefore, other embodiment is also in the scope of following claim.
Claims (35)
1. method of handling the slasher of polyfluohydrocarbon coating, described method comprises:
The slasher of polyfluohydrocarbon coating is contacted with the solution of solvent and antioxidant, thereby remove described polyfluohydrocarbon coating from described slasher top, wherein said solvent comprises at least a perfluoro alkane, perfluorinated cycloalkanes, perfluor aromatic hydrocarbons or their oligomer, and described antioxidant comprises phenol moieties or organophosphor part or lactone, azanol or their combination.
2. the method for claim 1, wherein said polyfluohydrocarbon comprises polytetrafluoroethylene (PTFE).
3. the method for claim 1, wherein said phenol moieties comprises the compound of formula I
Formula I.
4. the method for claim 1, wherein said organophosphor partly comprises the compound of formula II
Formula II.
5. the method for claim 1, the concentration of antioxidant is less than 0.1% in the wherein said solvent.
6. method as claimed in claim 5, the concentration of antioxidant is less than 0.05% in the wherein said solvent.
7. method as claimed in claim 6, the concentration of antioxidant is less than 0.01% in the wherein said solvent.
8. the method for claim 1, wherein said antioxidant is stable under the temperature more than or equal to described solvent boiling point.
9. the method for claim 1, wherein said solvent comprise at least a in higher boiling oligomeric side-products in the isomers, perfluoro ten tetanthrenes, preparation perfluoro ten tetanthrene processes of dodecafluorocyclohexane, eight naphthalene fluorides, the perfluoro tetradecane, perfluoro ten tetanthrenes, perfluoro perhydrogenate benzyl naphthalene or the perfluoro polyether.
10. method as claimed in claim 9, wherein said solvent comprise that general formula is C
14F
23(C
14F
22)
nC
14F
23Perfluoro perhydrophenanthrene oligomer, wherein n is 0,1 or 2.
11. method as claimed in claim 9, wherein said solvent comprise perfluoro ten tetanthrenes.
12. method as claimed in claim 10, wherein said solvent also comprises multiple antioxidant.
13. remove described solvent after the method for claim 1, described method also are included in described solvent and described slasher contacts.
14. method as claimed in claim 13 is wherein removed described solvent by described blade is immersed in the wash solution.
15. method as claimed in claim 13, the temperature of wherein said wash solution is near the boiling point of described wash solution.
16. method as claimed in claim 13, wherein said wash solution comprise perfluoro (2-n-butyl hydrogenation furans).
17. the method for claim 1, the boiling point of wherein said solvent is greater than the solution temperature of described polyfluohydrocarbon in described solvent.
18. method as claimed in claim 17 wherein at the boiling point that is lower than described solvent but be greater than or equal under the temperature of the solution temperature of polyfluohydrocarbon in described solvent, is handled described slasher with solvent.
19. method as claimed in claim 17 wherein at the boiling point that is higher than described solvent and be greater than or equal under the temperature of the solution temperature of polyfluohydrocarbon in described solvent, is handled described slasher with solvent.
20. the method for claim 1 wherein is coated on the described slasher by the dispersion with described polyfluohydrocarbon, heats described dispersion subsequently to being enough to make described polyfluohydrocarbon to stick to temperature on the slasher, with described slasher coating with polyfluohydrocarbon.
21. method as claimed in claim 20 wherein is coated to described dispersion on the described slasher by described dispersion is sprayed on the slasher.
22. method as claimed in claim 20 wherein is coated to described dispersion on the described slasher by described slasher is immersed in the described dispersion.
23. the method for claim 1, wherein slasher comprises blade, and described blade is coated with polyfluohydrocarbon.
24. also comprising, the method for claim 1, described method filter described solution.
25. the method for claim 1, described method comprise the slasher of described polyfluohydrocarbon coating is contacted with multiple antioxidant.
26. method as claimed in claim 25, wherein said antioxidant comprise phenyl moiety and organophosphor part.
27. method as claimed in claim 26, wherein said antioxidant comprises
With
Formula I formula II.
28. method as claimed in claim 27, the ratio of its Chinese style I and formula II is 1/2.
29. the method for claim 1, the temperature of wherein said solution is between 200 ℃ and 400 ℃.
30. method as claimed in claim 29, the temperature of wherein said solution is between 250 ℃ and 350 ℃.
31. method as claimed in claim 29, the temperature of wherein said solution is between 260 ℃ and 300 ℃.
32. method as claimed in claim 29, the temperature of wherein said solution are 280 ℃.
33. the method for claim 1, wherein said solution stands the pressure between 207kPa and 827kPa.
34. method as claimed in claim 33, wherein said solution stands the pressure between 276kPa and 414kPa.
35. a method of handling the slasher of polyfluohydrocarbon coating, described method comprises:
The slasher that makes polyfluohydrocarbon coating and perfluoro perhydrophenanthrene and ratio are that 1/2 the formula I and the solution of formula II compound contact
Formula I formula II.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53695304P | 2004-01-15 | 2004-01-15 | |
| US60/536,953 | 2004-01-15 | ||
| US11/033,181 | 2005-01-11 |
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| Publication Number | Publication Date |
|---|---|
| CN1910018A CN1910018A (en) | 2007-02-07 |
| CN100500391C true CN100500391C (en) | 2009-06-17 |
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ID=37700764
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800024062A Expired - Fee Related CN100500391C (en) | 2004-01-15 | 2005-01-14 | Method of treating razor blade cutting edges |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180230320A1 (en) * | 2017-02-13 | 2018-08-16 | The Gillette Company Llc | Razor blades |
| US10766157B2 (en) | 2017-02-13 | 2020-09-08 | The Gillette Company Llc | Razor blades |
| US11338321B2 (en) | 2019-05-09 | 2022-05-24 | The Gillette Company Llc | Method for modifying coated razor blade edges |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1211201A (en) * | 1996-01-17 | 1999-03-17 | 吉莱特公司 | Method of treating razor blade cutting edges |
| US5985459A (en) * | 1996-10-31 | 1999-11-16 | The Gillette Company | Method of treating razor blade cutting edges |
-
2005
- 2005-01-14 CN CNB2005800024062A patent/CN100500391C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1211201A (en) * | 1996-01-17 | 1999-03-17 | 吉莱特公司 | Method of treating razor blade cutting edges |
| US5985459A (en) * | 1996-10-31 | 1999-11-16 | The Gillette Company | Method of treating razor blade cutting edges |
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| CN1910018A (en) | 2007-02-07 |
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