DE1428608A1 - razor blade - Google Patents

Description

The invention "relates to a razor blade that has at least in the vicinity of the cutting edge a covering made of an inner material does not allow a smoother shave, as well as Process for making such a razor blade.

The invention is based on the object of a Golche razor blade with a firmly adhering, long-lasting and highly effective coating to improve shaving ability .

This object is essentially achieved according to the invention It is clear that the coating consists of a fully cured plastic from the PTJS group. The ΗΡϊΈ group includes H * a- ^ fcflt polytetrafluoroethylene itself, also pol ^ trifluorochloroethylene (Ρ0Ϊ3Έ) and fluorinated ethylene oropyylene (EEP).

According to the invention, such a coating is preferably produced on the blade by applying a suspension of the plastic of the Pi ¹ FE group adjacent to the cutting edge

8098 10/0050

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■ fird that liquid suspending agent evaporates and then that Blade is heated so that the plastic adheres to the blade.

But can eräug Dor Ov ^T erfindiuigsgemäß also applied thereby. Srden that the blade has a wlissBige suspension of the art. toffes is applied, the water having been relaxed with a non-ionic Octj'lplieno ^ cyä-ethanol and the blade -uf a 'temperature at which the plastic sinters or melts together- • - for the purpose of forming the "coating is heated.

Other methods for the formation of the: - :: coating consist in that the .Hinge is processed with a retainer cue of this plastic or a grinding wheel that is impregnated with the plastic ^: ..i.: 'd, or inden the coating through a! flame atomizer, electrostatic deposition or by placing a plate -!. [".

~ ϊ! η Proceed:; ur formation of the coating is hereinafter referred to as 23 example is described in detail.

In the normal mastering process for blades with the formation of the cutting edge, the blades are degreased using known methods. A suspension of FTJ ¹ E, PCTI? 3 or Z3P in erLtcpanritem water is then sprayed onto the cutting edge. It was found that: iichtionidche: "Ccb ~ ^r lpheiiojcj" ethanol is a special. represents a suitable grounding agent for the suspension. This is under the

809810/0050 BADOR | _Q , nal

--U ^ documents (Article 7SiAi ". ₂ No.is.a3toi" _aenlr , _WM , _v49 , _{96? |}

Hamen sells "TRITON X1OO", a suspension of PTFE in water With this relaxation agent, the I.O.I, under dew iToinen "FLUCH -j? I" in the trade ("FLUOH" i: t an incorporated;.: Trademark). For convenient handling, the blades can be stacked on top of each other, because it is only necessary that each other the coating over the abraded part of the blade is in one stretched a short distance from the cutting edge; the Coating begins, for example, a few tens of thousands? Tel izicli from the edge away and extends back up to a hundredth of an inch.

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In order to evaporate the water, the blades are either heated to a temperature sufficient for the evaporation of the water, e.g. 70 - 80 ° 0, either before spraying on or afterwards. The blades are then brought relatively slowly to a temperature at which the particles of PTFE, PCTFE or FEP sinter or melt together and form an adherent coating. For example, the blades are heated in an oven from room temperature to at least 360 ° C, up to 380 - 400 ° G _} in a period of about 2 minutes. When the temperature of about 270 ° G is reached, at least most of the relaxation agent evaporates. To avoid discoloration of the blades, the heating can be carried out in an inert atmosphere, for example argon or nitrogen.

It has been found that the application of the coating according to the invention has the effect of reducing the stress on the face is reduced and the blade has an improved performance

809810/0050

BATH ORIGINAL

ti 3 documents (Art. 7§1Abs. ^ No. 1 Sau 3 of the Amendment Act of 4 September 1967)

receives. Although the present subject matter of the invention does not adhere to To be bound by a "particular theory, it is believed that the improved shave according to the invention is due to that the uncoated part of the ground cutting edge causes the haircut and the "coating behind this uncoated" Part of the friction against the cut end of the hair and against the face reduces and thus the stress of the face during shaving. When a blade treated according to the invention was used for the first time to shave it is possible that a large part of the coating will be removed, but a very thin one remains Coating that gives an improved shave. .

Instead of the spray method, one can also proceed in such a way that the Blade edge is immersed in the suspension and then centrifuged, to distribute excess suspension away from the edge towards the center of the blade.

Another method of applying the coating is to use FTFE honing disks instead of the conventional leather honing discs. It is also possible to use grinding wheels impregnated with a substance from the PIPE group, with the wheel first against a block _s is kept of the plastic to cause the impregnation '. .

An advantage of this last method is that the temperature rise while grinding by using one in such a way impregnated block can be reduced kaxrcu

". '■ I- 3 U nteda'JJ 3 Π (Art.? § 1 Paragraph 2 No. 1 Sentence 3 of the Amendment Act.

The plastic can also be applied mixed with an adhesive resin and can be applied to the blade, for example by atomization, electrostatic deposition or the application of a
Leaflets are applied.

The invention is particularly suitable for use
Stainless steel razor blades, because without the temperature to which the blade must be exposed unduly affecting the hardness of the steel, satisfactory adhesion of the coating to the steel is obtained.

809810/0050

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Claims (1)

IT new claims rm razor blade that is at least near the cutting edge comprises a coating made of a material which enables smoother shaving, characterized in that the coating consists of a fully hardened plastic from the PTLE group. 2) method for producing the razor blade according to claim 1, characterized in that a suspension of the plastic is applied to the blade and the blade is heated so that the plastic adheres to the blade. 3) Method according to claim 2, characterized in that the plastic is suspended in water which is relaxed with non- ionic octylphenoxaethanol. Method according to claim 2 or 3? characterized in that 360 ° Blade is heated to at least 360 ° G A method of making the blade of claim 1, characterized characterized in that · a blade made with a honing disk BAD OR! G, iHAL 809810/0050 New documents (Art. / G ι At *. 2 No. ι sentence 3 dt «Xndtrungae« ·. V. 4.9. Wi> / » the plastic or a grinding wheel that comes with the plastic impregnated int, treated. G) Verfaliren for the production of the Klinge.nach claim 1, characterized characterized in that molten plastic is sprayed onto the blade. 7) A method for producing the blade according to claim 1, characterized in that the plastic in an electrostatic manner is deposited. 8) A method for producing the blade according to claim 1, thereby characterized in that a thin leaflet or a sheet of plastic is placed on a blade and followed by Heating the plastic is made to melt. BATH ORIGINAL 809810/0050