WO2018203783A1 - Procédé de fabrication d'une soie synthétique creuse, soie synthétique creuse et pinceau comprenant de telles soies synthétiques creuses - Google Patents

Procédé de fabrication d'une soie synthétique creuse, soie synthétique creuse et pinceau comprenant de telles soies synthétiques creuses Download PDF

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Publication number
WO2018203783A1
WO2018203783A1 PCT/SE2017/051195 SE2017051195W WO2018203783A1 WO 2018203783 A1 WO2018203783 A1 WO 2018203783A1 SE 2017051195 W SE2017051195 W SE 2017051195W WO 2018203783 A1 WO2018203783 A1 WO 2018203783A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow synthetic
bristle
synthetic bristle
tipping
chemically
Prior art date
Application number
PCT/SE2017/051195
Other languages
English (en)
Inventor
Maria Ragnarsson
Fredrik HEINSJÖ
Original Assignee
Orkla House Care Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from SE1750529A external-priority patent/SE542116C2/en
Application filed by Orkla House Care Ab filed Critical Orkla House Care Ab
Priority to LTEPPCT/SE2017/051195T priority Critical patent/LT3579724T/lt
Priority to FIEP17908331.6T priority patent/FI3579724T3/fi
Priority to EP17908331.6A priority patent/EP3579724B1/fr
Publication of WO2018203783A1 publication Critical patent/WO2018203783A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/02—Bristles details
    • A46D1/0246—Hollow bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D1/00—Bristles; Selection of materials for bristles
    • A46D1/04—Preparing bristles
    • A46D1/05—Splitting; Pointing
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/20—Brushes for applying products to surfaces in general
    • A46B2200/202—Applicator paint brush

Definitions

  • the present invention relates to a method of producing a hollow synthetic bristle, a hollow synthetic bristle and a paint brush comprising a plurality of such hollow synthetic bristles.
  • Natural fibres having split ends are known to hold paint more effectively and the multitude of small hairs at the tip section of each bristle to create a finer, smoother surface finish.
  • Hollow paint brush synthetic bristles have become more and more popular since they have a good paint pick up.
  • no hollow synthetic bristles providing a similar efficiency as the natural fibres regarding the combination of holding paint and creating a finer surface finish has yet been satisfactorily achieved.
  • paint brushes having synthetic bristles are easier to clean and usually are less expensive than paint brushes having natural fibres.
  • a further object of the present invention is to provide a method of chemically flagging/fraying free ends of hollow synthetic bristles such that their free ends are flagged/fringed "enough", i.e. not too much or too little.
  • their free ends comprise an optimised shape and/or number and/or size of useful split ends/frays being two, three or a plurality of smaller and/or fractional ends at the free end section of each hollow synthetic bristle and to provide such inventive hollow synthetic bristles for manufacture of paint brushes.
  • the method according to the invention make the free ends of the hollow synthetic bristles tattered and torn by chemically dividing them/splitting them up/disunite them into more and smaller free ends out of one larger free end.
  • These hollow synthetic bristles each comprising a multi-tipped free end, i.e. a free end comprising at least two "micro” tips, instead of only one "macro” tip, accomplishing improved paint pickup, paint release and fine and smooth surface finish.
  • a method of producing a hollow synthetic bristle for a paint brush comprising; arranging a first end of the hollow synthetic bristle in a holder, immersing a part of a second end of the hollow synthetic bristle in a chemically tipping fluid, lifting up the hollow synthetic bristle from the chemically tipping fluid after a period of time, wherein the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 1 - 30% of the length of the hollow synthetic bristle.
  • tipping is throughout this document hereby meant any processing or finish treatment suitable to be applied to a tip section of a synthetic bristle, such as a modified method of tapering and flagging.
  • a finish treatment or processing of the free or second end of the hollow synthetic bristle including chemical tipping of between 1 - 30% of the length of the hollow synthetic bristle.
  • bristle an elongated flexible body having a first end and a second end.
  • the first end is part of a root section where the bristle may be contained in and/or fastened in a bristle carrier.
  • the second end of the bristle forms a free tip which usually contacts a surface to be coated with paint.
  • the second end is part of a tip section of the bristle.
  • the hollow synthetic bristle may be produced from a wide variety of thermoplastic polymers, such as polyamides, polyesters and polyolefins.
  • the cross-sectional area of the hollow synthetic bristle may be cylindrical or oval shaped or S- shaped and the hollow synthetic bristle may have an approximate even wall thickness along the length of the synthetic bristle before being chemically tipped.
  • the hollow synthetic bristle may be between 40 - 100 mm long.
  • the hollow synthetic bristle may comprise one or more longitudinal cavities extending from an opening in the free or second end of the synthetic bristle toward the first end of the synthetic bristle.
  • the one or more longitudinal cavities may extend along a part of the length of the synthetic bristle or along the whole length of the synthetic bristle making the synthetic bristle partly hollow along its length or hollow along its full length similar to a tube.
  • the one or more longitudinal cavities may, but do not have to, be in exact alignment with the central axis of the synthetic bristle.
  • Such a cavity may also extend at an angle relative the longitudinal extension and the extension of the central axis of a synthetic bristle.
  • a hollow synthetic bristle having a satisfactorily tipped section. The tip section corresponding to the part of the second end of the hollow synthetic bristle being immersed in the chemically tipping fluid.
  • the chemical tipping reduces the wall thickness of the hollow synthetic bristle on both its outside and inside surface.
  • the reduced wall thickness obtained by tipping the outside surface of the hollow synthetic bristle provides a tapered synthetic bristle.
  • the reduced wall thickness obtained by tipping the inside surface of the hollow synthetic bristle provides a larger hollow cavity within the tipped part of the synthetic bristle which accommodates an increased capability of paint pickup.
  • the chemical tipping flag the tipped part of the hollow synthetic bristle into a plurality of split ends or tips, which accommodates a further increased capability of paint pickup, paint release and creation of a fine and smooth surface finish.
  • the method according to the invention make the free ends of the hollow synthetic bristles tattered and torn by chemically dividing them/splitting them up/disunite them into more and smaller free ends out of one larger free end.
  • These hollow synthetic bristles each comprising a multi-tipped free end, i.e. a free end comprising at least two "micro” tips, instead of only one "macro" tip.
  • the outer diameter of the hollow synthetic bristle is 0,3 - 1.0mm.
  • the inner diameter of the hollow synthetic bristle is equal to or larger than 0,15mm.
  • the hollow synthetic bristle achieves a capillary force that is strong enough to suck in the chemically tipping fluid and at the same time release the chemically tipping fluid to stop the reaction between the bristle and the chemically tipping fluid.
  • length of the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is equal to or smaller than 20mm.
  • the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 10 - 30%, 10 - 25% or 10 - 20% of the length of the hollow synthetic bristle.
  • the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 10 - 30%, 10 - 25% or 10 - 20% of the length of hollow synthetic bristle.
  • the length of the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 1 - 20 mm, 5 - 15 mm or about 10 mm.
  • the chemically tipping fluid comprises sodium hydroxide (NaOH).
  • the method may thereby comprise applying a chemically tipping fluid, which may be a sodium hydroxide, to the part of the second end of the hollow synthetic bristle.
  • the chemically tipping fluid may be a sodium hydroxide solution or any other suitable lye being highly soluble in water producing a caustic basic solution.
  • the sodium hydroxide solution may comprise 30 - 40% sodium hydroxide and 60 - 70% water and be heated to approximately 100 C°.
  • the chemical tipping may be provided by immersing the part of the second end of the hollow synthetic bristle one or more times into the chemically tipping fluid, such as the sodium hydroxide solution.
  • the chemical tipping may be provided by immersing the part of the second end of the hollow synthetic bristle with a varying depth/distance into the chemically tipping fluid during the time duration in the tipping fluid.
  • a wall thickness of the hollow synthetic bristle is from about 0.05 - 0.1 mm and/or between 0.05 - 0.1 mm.
  • the chemically tipped part of the second end of the synthetic bristle may comprise a thinner wall thickness compared to the non-tipped remaining part of the synthetic bristle.
  • lifting up the hollow synthetic bristle from the chemically tipping fluid is made after such a period of time that longitudinal parts of the hollow synthetic bristle has been decomposed in the chemically tipping fluid and the second end of the hollow synthetic bristle has two or more tips.
  • the hollow synthetic bristle is a hollow polyester bristle.
  • the method further comprises the step of drying the hollow synthetic bristle.
  • the method further comprising the step of enclosing the circumference of the hollow synthetic bristle with a sheet of synthetic material before the step of immersing.
  • the hollow synthetic bristle have a annular cross section
  • Fig. la shows a chemically tipped hollow synthetic bristle according to the invention
  • Fig. lb shows a cross-sectional view (A-A) of the synthetic bristle in Fig. la
  • the present invention relates to a hollow synthetic bristle 1 to be used together with several other synthetic bristles being the same, similar or different as a plurality or a bundle or mixture of synthetic bristles with at least one such inventive hollow synthetic bristle, preferably more than one, in paint brushes (not shown) and a paint brush comprising a plurality of such synthetic bristles 1.
  • the present invention also relates to a method of forming/shaping the synthetic bristle 1, i.e. at least a part of its free end, i.e. its second end.
  • Figs, la-lb show a synthetic bristle 1 according to the invention. Referring to Fig. la, a hollow synthetic bristle 1 that has been chemically tipped according to the invention is illustrated.
  • the synthetic bristle 1 comprise a first end and a second end.
  • the synthetic bristle 1 comprise a part 2 at the second end and a remaining part 4.
  • the synthetic bristle 1 is divided into the part 2 of the second end, i.e. a tipped section, and the remaining part 4, i.e. a non-tipped section, extending from a first end (not shown) of the hollow synthetic bristle towards part 2 of the second end.
  • the tipped part 2 extends from the non-tipped remaining part 4 towards an opening 5 at the second end.
  • the tipped part 2 is part of the free end of the hollow synthetic bristle 1.
  • the hollow synthetic bristle 1 may be a tubular synthetic bristle 1 comprising a longitudinal cavity 6 extending from the opening 5 along the length of the synthetic bristle.
  • the longitudinal cavity 6 may as in the presently illustrated aspect be cylindrical, or have any other suitable shape. According to an aspect the opening 5
  • the /longitudinal cavity 6 has an inner diameter, i.e. the hollow synthetic bristle 1 has an inner diameter.
  • the opening 5 is circular.
  • the longitudinal cavity 6 may as in the presently illustrated aspect be an inner cavity extending along the length of the synthetic bristle. If the hollow synthetic bristle 1 is oval-shaped in cross-section the longitudinal cavity 6 may have a corresponding oval shape.
  • the hollow synthetic bristle 1 may be made from polyester and the non-tipped remaining part 4 may have an outer diameter between 0,2 - 1,0mm. According to an aspect the outer diameter is 0.2 - 0,4 mm.
  • the tipped part 2 of the second end of the synthetic bristle comprises 1 - 30% or 10 - 30% or 10 - 25% of the total length of the synthetic bristle 1.
  • the tipped part 2 of the second end of the synthetic bristle 1 comprises 10 - 20% of the total length of the synthetic bristle.
  • the wall thickness of the non-tipped remaining part 4 may be between 0.05 - 0.1 mm and the wall thickness of the tipped part 2 of the second end may be between 0.05 - 0.1 mm. In some aspects, the wall thickness of tipped part 2 of the second end is less than the wall thickness of non-tipped remaining part 4.
  • the outer diameter of the hollow synthetic bristle is 0,3 - 1.0mm before being processed according to the method.
  • length of the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is equal to or smaller than 20mm.
  • the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 10 - 30%, 10 - 25% or 10 - 20% of the length of the hollow synthetic bristle.
  • the wall thickness of the hollow synthetic bristle is 0.05 - 0.4 mm, 0,05 - 0,2mm or 0.05-0,lmm.
  • a first step A comprises arranging the first end (not shown) of the hollow synthetic bristle 1 in a holder (not shown).
  • the hollow synthetic bristle 1 is arranged in a holder in the form of a cage, wherein the second ends are directed downwards.
  • the following step B comprises immersing the part 2 to be tipped of the second end of the hollow synthetic bristle 1 in a chemically tipping fluid, wherein the part 2 to be tipped of the second end of the hollow synthetic bristle 1 may make up 1 - 30% of the length of hollow synthetic bristle 1.
  • the part 2 to be tipped of the second end of the hollow synthetic bristle 1 may make up 10 - 30% or 10 - 25% or 10 - 20% of the length of hollow synthetic bristle 1.
  • the part 2 to be tipped of the second end of the hollow synthetic bristle 1 may make up 1 - 20 mm, 5 - 15 mm or about 10 mm of the length of hollow synthetic bristle 1.
  • the following step C comprises lifting up the hollow synthetic bristle 1 from the chemically tipping fluid after a period of time.
  • the period of time may be in between 30 - 60 minutes and/or about 30 minutes and/or about 60 minutes or for a period of time being more or less.
  • Step D and E are both optional steps wherein one of them or both may be performed after step C.
  • Step D comprises immersing the second end of the hollow synthetic bristle 1 in water or any other suitable cleaning liquid after it has been lifted up from the chemically tipping fluid.
  • the method further comprising washing the hollow synthetic bristle 1 in water after it has been lifted up from the chemically tipping fluid.
  • the washing fluid could be water, a water mixed with additives or any other suitable washing fluid.
  • Step D is done to rinse or wash off the tipping fluid from the hollow synthetic bristle 1 before further use
  • Step E comprises drying the hollow synthetic bristle 1.
  • Purpose of step E is self-explanatory. Experiments have shown that by applying the chemical tipping to a shorter end portion of the synthetic bristle than conventionally done when using chemically tipping on solid bristles, usually about 25 mm of the tip section or up to 50% of the length of prior art bristles, a method is provided which allows the use of chemical tipping on a hollow synthetic bristle, as the problem of capillary action drawing tipping fluid into a non-controllable inside depth of the synthetic bristle is avoided.
  • the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 10 - 30%, 10 - 25% or 10 - 20% of the length of hollow synthetic bristle.
  • the length of the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is 1 - 20 mm, 5 - 15 mm or about 10 mm.
  • the chemically tipping fluid comprises according to an aspect sodium hydroxide (NaOH).
  • the method may thereby comprise applying a chemically tipping fluid, which may be a sodium hydroxide, to the part of the second end of the hollow synthetic bristle.
  • a chemically tipping fluid which may be a sodium hydroxide
  • the chemically tipping fluid is a sodium hydroxide solution or any other suitable lye being highly soluble in water producing a caustic basic solution.
  • the sodium hydroxide solution may comprise 30 - 40% sodium hydroxide and 60 - 70% water and be heated to approximately 100 C°.
  • the step of immersing the part of the second end of the hollow synthetic bristle is repeated one or more times into the chemically tipping fluid, such as the sodium hydroxide solution.
  • the chemical tipping is according to an aspect provided by immersing the part of the second end of the hollow synthetic bristle with a varying depth/distance into the chemically tipping fluid during the time duration in the tipping fluid.
  • the immersed part of the second end of the hollow synthetic bristle is lifted up and down in tipping fluid at different time rates and/or velocities and/or stepwise. It may be held immersed at different depths and with varying duration at each depth or immersed in steps and with varying depth and/or held immersed with the same or different duration at each step.
  • the chemically tipped part of the second end of the synthetic bristle comprise a thinner wall thickness compared to the non-tipped remaining part of the synthetic bristle.
  • the hollow synthetic bristle(s) may be dipped into the chemically tipping solution, such as the sodium hydroxide solution, preferably in between 30 - 60 minutes and/or about 30 minutes and/or about 60 minutes or for a period of time being more or less.
  • the step of lifting up the hollow synthetic bristle 1 from the chemically tipping fluid is made after such a period of time that the part of the hollow synthetic bristle 1 has been partly decomposed, as disclosed in fig 2, in the chemically tipping fluid.
  • the hollow synthetic bristle 1 decomposes the wall thickness of the second end of the hollow synthetic bristle 1 is reduced.
  • the wall thickness will be reduced to zero in some parts of the second end of the hollow synthetic bristle 1 and thereby dividing the second end into different tips 7.
  • the step of lifting up the hollow synthetic bristle from the chemically tipping fluid is made after such a period of time that longitudinal parts of the hollow synthetic bristle has been decomposed in the chemically tipping fluid and the second end of the hollow synthetic bristle has two or more tips.
  • the period of time is such that 1 - 30% of the part of the hollow synthetic bristle that is immersed in the chemically tipping fluid is decomposed in the chemically tipping fluid.
  • the method further comprising the step of enclosing the circumference of the hollow synthetic bristle with a sheet of synthetic material before the step B of immersing.
  • the method further comprising the step of arranging a bundle of hollow synthetic bristles in the holder.
  • the method further comprising the step of enclosing the circumference of the bundle of hollow synthetic bristles with a sheet of synthetic material before the step of immersing.
  • the hollow synthetic bristle 1 has a annular cross section, i.e. a ring shaped cross sectional shape.
  • the inner cavity of the hollow synthetic bristle has a circular cross section, i.e. the hollow part of the hollow synthetic bristle 1 is circular.
  • the outer dimension of the hollow synthetic bristle 1 has a circular cross section, i.e. the outer shape of the hollow synthetic bristle 1 is circular. The difference in radius of the inner circular cavity and the radius of the outer circular shape corresponds to the wall thickness of the hollow synthetic bristle 1.

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  • Brushes (AREA)

Abstract

La présente invention concerne un procédé de production d'une soie synthétique creuse, une soie synthétique creuse et un pinceau comprenant une pluralité de telles soies synthétiques creuses. Le procédé comprend les étapes suivantes consistant : 1) à disposer au moins une première extrémité de la soie synthétique creuse (1) dans un dispositif de support ; 2) à immerger une partie (2) d'une seconde extrémité de la soie synthétique creuse (1) dans un fluide d'amincissement chimique ; 3) à lever la soie synthétique creuse (1) hors du fluide d'amincissement chimique après une certaine période de temps, la partie (2) de la soie synthétique creuse (1) qui est immergée dans le fluide d'amincissement chimique représentant 1 à 30 % de la longueur de la soie synthétique creuse (1).
PCT/SE2017/051195 2017-05-02 2017-11-30 Procédé de fabrication d'une soie synthétique creuse, soie synthétique creuse et pinceau comprenant de telles soies synthétiques creuses WO2018203783A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
LTEPPCT/SE2017/051195T LT3579724T (lt) 2017-05-02 2017-11-30 Tuščiavidurių sintetinių šerių gamybos būdas, tuščiaviduriai sintetiniai šeriai ir dažymo teptukas, apimantis tokius tuščiavidurius sintetinius šerius
FIEP17908331.6T FI3579724T3 (fi) 2017-05-02 2017-11-30 Menetelmä onton synteettisen harjaksen valmistamiseksi, ontto synteettinen harjas sekä tällaisia onttoja synteettisiä harjaksia käsittävä sivellin
EP17908331.6A EP3579724B1 (fr) 2017-05-02 2017-11-30 Procédé de fabrication d'une soie synthétique creuse, soie synthétique creuse et pinceau comprenant de telles soies synthétiques creuses

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
SE1750529A SE542116C2 (en) 2017-05-02 2017-05-02 Method of producing a hollow synthetic bristle, a hollow synthetic bristle and a paint brush comprising such hollow synthetic bristles
SE1750529-8 2017-05-02
CN201710912103.9 2017-09-29
CN201721275332.6 2017-09-29
CN201710912103.9A CN108783874B (zh) 2017-05-02 2017-09-29 中空合成鬃毛及其制造方法、及包括其的涂料刷
CN201721275332.6U CN207626780U (zh) 2017-05-02 2017-09-29 中空合成鬃毛及包括其的涂料刷

Publications (1)

Publication Number Publication Date
WO2018203783A1 true WO2018203783A1 (fr) 2018-11-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2017/051195 WO2018203783A1 (fr) 2017-05-02 2017-11-30 Procédé de fabrication d'une soie synthétique creuse, soie synthétique creuse et pinceau comprenant de telles soies synthétiques creuses

Country Status (1)

Country Link
WO (1) WO2018203783A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060477B (en) * 1979-09-24 1983-01-26 Du Pont Tri-or tetra/locular paint brush bristles
US4381325A (en) * 1979-09-10 1983-04-26 Toray Industries, Inc. Liquid retaining synthetic fiber, process for producing the same, and products
JP2004255113A (ja) * 2003-02-28 2004-09-16 Fooesu:Kk ブラシ用毛
US20100306944A1 (en) * 2009-03-04 2010-12-09 Braun Gmbh Toothbrush bristle and method for manufacturing such a bristle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381325A (en) * 1979-09-10 1983-04-26 Toray Industries, Inc. Liquid retaining synthetic fiber, process for producing the same, and products
GB2060477B (en) * 1979-09-24 1983-01-26 Du Pont Tri-or tetra/locular paint brush bristles
JP2004255113A (ja) * 2003-02-28 2004-09-16 Fooesu:Kk ブラシ用毛
US20100306944A1 (en) * 2009-03-04 2010-12-09 Braun Gmbh Toothbrush bristle and method for manufacturing such a bristle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3579724A4 *

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