CA2109935C - Method for dyeing nylon filaments - Google Patents
Method for dyeing nylon filaments Download PDFInfo
- Publication number
- CA2109935C CA2109935C CA002109935A CA2109935A CA2109935C CA 2109935 C CA2109935 C CA 2109935C CA 002109935 A CA002109935 A CA 002109935A CA 2109935 A CA2109935 A CA 2109935A CA 2109935 C CA2109935 C CA 2109935C
- Authority
- CA
- Canada
- Prior art keywords
- nylon filament
- nylon
- solution
- batch
- filament
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B15/00—Other brushes; Brushes with additional arrangements
- A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
- A46B15/0004—Arrangements for enhancing monitoring or controlling the brushing process with a controlling means
- A46B15/001—Arrangements for enhancing monitoring or controlling the brushing process with a controlling means with means indicating the remaining useful life of brush
-
- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46D—MANUFACTURE OF BRUSHES
- A46D1/00—Bristles; Selection of materials for bristles
- A46D1/04—Preparing bristles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/0004—General aspects of dyeing
- D06P1/002—Processing by repeated dyeing, e.g. in different baths
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/24—Polyamides; Polyurethanes
- D06P3/241—Polyamides; Polyurethanes using acid dyes
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Coloring (AREA)
Abstract
A method for dyeing nylon filaments for use in wear-indicating toothbrushes includes immersing a batch of a first nylon filament for between 10 minutes and 80 minutes in an aqueous solution containing between 0.01% and 0.19% weight to volume of Indigotine dye, said solution having a pH between 1 and 7 and having a temperature between 50.degree.C and 90.degree.C, the dye penetrating into the filament to color an outer cross-sectional region and not penetrating into an inner cross-sectional region of the filament; removing the batch of the first nylon filament from the solution, and repeating the steps for a batch of a second nylon filament, reusing the same solution.
Description
W'D 92/22699 PCT/US92/04589 '109935 METHOD FOR DYEING NYLON FILAMENTS
The invention relates to filaments for toothbrushes .
Breuer et al., U.S. Pat. No. 4,802,255 describes nylon monofilaments that include at least two colored regions, one of which is provided by a dye.
The monofilaments are included in the bristles of toothbrushes and, as the toothbrush is used by the owner, the color intensity of the dyed region changes in response to wear, providing an indication of when the toothbrush should be replaced. Breuer et al. lists six food dyes or colorants that can be used to dye the monofilaments including Indigotine (FD&C Blue No. 2), and in col. 4 broadly describes the conditions that can be used for dyeing. Breuer et al. also provides a number of specific examples of dyeing procedures, including three (examples 4-6) in which Indigotine is used as the dye.
The specific dyeing procedures described by Breuer et al. were for laboratory samples. However, to produce a sufficient amount of dyed filaments for commercial toothbrushes, a procedure is needed that can be used for dyeing large amounts of filaments. The procedure should be cost-efficient and, of course, should produce nylon filaments that have a consistent level of dye penetration.
In general, the invention is a method for 2~.~g93~
dyeing batches of nylon filaments for toothbrushes. As used herein, a batch is at least two pounds of nylon filament. The method includes immersing a batch of a first nylon filament for between 10 minutes and 80 minutes in an aqueous solution containing between .O1%
and 0.1% weight to volume of Indigotine dye. The solution should have a pH between 1 and 7, and should have a temperature between 50'C. and 90'C. While the nylon filament is immersed, the dye penetrates into an outer cross-sectional region but not into an inner cross-sectional region. The batch of the first nylon filament is removed from the solution, and can be used for bristles in a wear-indicating toothbrush. The same procedure is repeated for a batch of a second nylon filament, reusing the same solution. Preferably, the same solution is then used for dyeing additional batches. In the preferred method, the aqueous solution contains between 0.01% and 0.05% weight to volume of Indigotine dye; the solution has a pH of between 2.5 and 4.5; and the temperature of the solution is between 70'C. and 85°C. Preferably, the dyeing step is performed at atmospheric pressure and takes less than 60 minutes, and the nylon filaments have a diameter of between 0.005 inches and 0.014 inches.
The method can be used to produce commercial quantities of nylon filaments for use in wear-indicating toothbrushes in a cost-effective manner.
For example, the procedure can be used on 10-40 lb.
batches of nylon filaments, and even on batches weighing 100 lbs or more. Importantly, the same solution can be reused at least once, and even up to five or six times, and still produce filaments in which the Indigotine dye has penetrated an even, consistent cross-sectional area. The method is easy to carry out, safe, and provides a stable dye solution.
The invention relates to filaments for toothbrushes .
Breuer et al., U.S. Pat. No. 4,802,255 describes nylon monofilaments that include at least two colored regions, one of which is provided by a dye.
The monofilaments are included in the bristles of toothbrushes and, as the toothbrush is used by the owner, the color intensity of the dyed region changes in response to wear, providing an indication of when the toothbrush should be replaced. Breuer et al. lists six food dyes or colorants that can be used to dye the monofilaments including Indigotine (FD&C Blue No. 2), and in col. 4 broadly describes the conditions that can be used for dyeing. Breuer et al. also provides a number of specific examples of dyeing procedures, including three (examples 4-6) in which Indigotine is used as the dye.
The specific dyeing procedures described by Breuer et al. were for laboratory samples. However, to produce a sufficient amount of dyed filaments for commercial toothbrushes, a procedure is needed that can be used for dyeing large amounts of filaments. The procedure should be cost-efficient and, of course, should produce nylon filaments that have a consistent level of dye penetration.
In general, the invention is a method for 2~.~g93~
dyeing batches of nylon filaments for toothbrushes. As used herein, a batch is at least two pounds of nylon filament. The method includes immersing a batch of a first nylon filament for between 10 minutes and 80 minutes in an aqueous solution containing between .O1%
and 0.1% weight to volume of Indigotine dye. The solution should have a pH between 1 and 7, and should have a temperature between 50'C. and 90'C. While the nylon filament is immersed, the dye penetrates into an outer cross-sectional region but not into an inner cross-sectional region. The batch of the first nylon filament is removed from the solution, and can be used for bristles in a wear-indicating toothbrush. The same procedure is repeated for a batch of a second nylon filament, reusing the same solution. Preferably, the same solution is then used for dyeing additional batches. In the preferred method, the aqueous solution contains between 0.01% and 0.05% weight to volume of Indigotine dye; the solution has a pH of between 2.5 and 4.5; and the temperature of the solution is between 70'C. and 85°C. Preferably, the dyeing step is performed at atmospheric pressure and takes less than 60 minutes, and the nylon filaments have a diameter of between 0.005 inches and 0.014 inches.
The method can be used to produce commercial quantities of nylon filaments for use in wear-indicating toothbrushes in a cost-effective manner.
For example, the procedure can be used on 10-40 lb.
batches of nylon filaments, and even on batches weighing 100 lbs or more. Importantly, the same solution can be reused at least once, and even up to five or six times, and still produce filaments in which the Indigotine dye has penetrated an even, consistent cross-sectional area. The method is easy to carry out, safe, and provides a stable dye solution.
Other advantages of the invention will be apparent from the description of the preferred embodiment thereof, and from the claims.
Dyed wear-indicating nylon monofilaments, toothbrushes including such monofilaments, and the way the toothbrushes are made are described in detail in Breuer et al.
The dyeing solution used in the method of the invention contains between 0.01% and 0.1% weight to to volume Indigotine. If too much Indigotine is used, too much dye penetrates too far into the filament. If too little dye is used, too little dye may penetrate, and the solution may not be reusable because the initial batch of filament may absorb the limited quantifiy of dye present.
The temperature of the solution should be between 50'C. and 90'C. Too high a temperature results in water quickly evaporating off, resulting in the dye becoming more concentrated, and the dye being taken up too fast, making the degree of penetration more difficult to control. Too low a temperature results in too slow a dye uptake.
The dyeing process preferably is done at atmospheric pressure, to avoid the necessity of using large pressurized equipment in a plant.
Indigotine is an acid stable dye, and the solution should be acidic.
The volume of dyeing solution should be large enough so that the first batch of filament does not absorb such a high percentage of the dye in the solution that the solution cannot be reused to dye a second batch.
The nylon filaments, most preferably monofilaments, should be of the diameter commonly used in toothbrushes, most preferably 0.008 or 0.009 inch.
. 4 21 49935 The nylon filament should be immersed in solution long enough to get adequate dye penetration of the outer cross-sectional diameter of the filament to provide good wear-indicating characteristics. Preferably, the immersion time should be as limited as possible, and should be less than 1 hour.
A detailed description of the most preferred method is provided below, beginning with a description of the equipment and solutions used, followed by the procedure.
The dyeing step is performed in a 633 gallon WhitingT"' stainless steel tank having side dimensions of 30" x 40" x 130".
The dyeing solution used in the tank includes 633 gallons of distilled water; 7.7 liters of glacial acidic acid;
and 555 g of 1000 pure Indigotine. The temperature of the solution is maintained at 75°C. + 1.5°C.
Two 633 gallon rinse tanks also are used. The first tank is filled with tap water. The second tank is filled with tap water mixed with 1.5 liters of Dow CorningT"' #24 silicone emulsion.
The monofilament used is an eight foot long, 0.008 inch diameter WytexT"" 6.12 S nylon hank (bundle) weighing approximately 10 pounds. The hank should be siliconed, annealed, wet, and combed prior to dyeing, according to standard procedures. The hank should not be dried prior to use.
4a ~ 1 0 9 9 3 5 Dyeing Procedure 1) Completely submerse four hanks in the dye solution.
2) Set timer for 45 minutes.
3) Lift and resubmerse hanks every 1.5 minutes to permit circulation of dye between filaments.
WO 92/22699 ~ 10 9 9 3 5 PCT/US92/04589 4) After 45 minutes, remove hanks and transfer to the first rinse tank. Rinse by dipping 4 to 5 times.
Dyed wear-indicating nylon monofilaments, toothbrushes including such monofilaments, and the way the toothbrushes are made are described in detail in Breuer et al.
The dyeing solution used in the method of the invention contains between 0.01% and 0.1% weight to to volume Indigotine. If too much Indigotine is used, too much dye penetrates too far into the filament. If too little dye is used, too little dye may penetrate, and the solution may not be reusable because the initial batch of filament may absorb the limited quantifiy of dye present.
The temperature of the solution should be between 50'C. and 90'C. Too high a temperature results in water quickly evaporating off, resulting in the dye becoming more concentrated, and the dye being taken up too fast, making the degree of penetration more difficult to control. Too low a temperature results in too slow a dye uptake.
The dyeing process preferably is done at atmospheric pressure, to avoid the necessity of using large pressurized equipment in a plant.
Indigotine is an acid stable dye, and the solution should be acidic.
The volume of dyeing solution should be large enough so that the first batch of filament does not absorb such a high percentage of the dye in the solution that the solution cannot be reused to dye a second batch.
The nylon filaments, most preferably monofilaments, should be of the diameter commonly used in toothbrushes, most preferably 0.008 or 0.009 inch.
. 4 21 49935 The nylon filament should be immersed in solution long enough to get adequate dye penetration of the outer cross-sectional diameter of the filament to provide good wear-indicating characteristics. Preferably, the immersion time should be as limited as possible, and should be less than 1 hour.
A detailed description of the most preferred method is provided below, beginning with a description of the equipment and solutions used, followed by the procedure.
The dyeing step is performed in a 633 gallon WhitingT"' stainless steel tank having side dimensions of 30" x 40" x 130".
The dyeing solution used in the tank includes 633 gallons of distilled water; 7.7 liters of glacial acidic acid;
and 555 g of 1000 pure Indigotine. The temperature of the solution is maintained at 75°C. + 1.5°C.
Two 633 gallon rinse tanks also are used. The first tank is filled with tap water. The second tank is filled with tap water mixed with 1.5 liters of Dow CorningT"' #24 silicone emulsion.
The monofilament used is an eight foot long, 0.008 inch diameter WytexT"" 6.12 S nylon hank (bundle) weighing approximately 10 pounds. The hank should be siliconed, annealed, wet, and combed prior to dyeing, according to standard procedures. The hank should not be dried prior to use.
4a ~ 1 0 9 9 3 5 Dyeing Procedure 1) Completely submerse four hanks in the dye solution.
2) Set timer for 45 minutes.
3) Lift and resubmerse hanks every 1.5 minutes to permit circulation of dye between filaments.
WO 92/22699 ~ 10 9 9 3 5 PCT/US92/04589 4) After 45 minutes, remove hanks and transfer to the first rinse tank. Rinse by dipping 4 to 5 times.
5) Transfer the to the second rinse tank.
Continue rinsing by dipping another 4 to 5 times. This rinse will restore the finish lost during the dyeing process.
Continue rinsing by dipping another 4 to 5 times. This rinse will restore the finish lost during the dyeing process.
6) Recomb hanks and continue with the normal drying and wrapping process.
7) Repeat the procedure 4 times for additional batches of hanks, using the same solutions. The dye solution and first rinse are changed after 5 hanks have been dyed: the second rinse solution is replaced daily.
Optionally, the above procedure can be modified by immersing set of hanks for 30 minutes in a dyeing solution heated to 80'C. ~ 1.5'C. In addition, the procedure can be used to dye 10 hanks at a time, as opposed to four hanks.
Other embodiments are within the claims.
Optionally, the above procedure can be modified by immersing set of hanks for 30 minutes in a dyeing solution heated to 80'C. ~ 1.5'C. In addition, the procedure can be used to dye 10 hanks at a time, as opposed to four hanks.
Other embodiments are within the claims.
Claims (8)
1. A method of dyeing and affixing nylon filaments to toothbrushes, comprising:
(a) immersing a first batch of a nylon filament for between 10 minutes and 80 minutes in an aqueous solution comprising between 0.01% and 0.05% weight to volume of Indigotine dye, said solution having a pH between 2.5 and 4.5, and having a temperature between 70°C
and 85°C, said Indigotine dye consistently penetrating into said nylon filament to color an even outer cross-sectional region of said nylon filament, and not penetrating into an inner cross-sectional region of said nylon filament;
(b) removing the first batch of said nylon filament from said solution to provide a first dyed nylon filament having said outer cross-sectional region colored with said Indigotine dye and said inner cross-sectional region not colored with said Indigotine dye;
(c) affixing said first dyed nylon filament to the head of a first toothbrush;
(d) repeating steps (a), (b), and (c) for a second batch of a nylon filament and a second toothbrush, reusing the same said solution, to provide first and second toothbrushes each having the same amount of said Indigotine dye consistently penetrating into said nylon filament to color evenly the same outer cross-sectional region of said nylon filament in each toothbrush.
(a) immersing a first batch of a nylon filament for between 10 minutes and 80 minutes in an aqueous solution comprising between 0.01% and 0.05% weight to volume of Indigotine dye, said solution having a pH between 2.5 and 4.5, and having a temperature between 70°C
and 85°C, said Indigotine dye consistently penetrating into said nylon filament to color an even outer cross-sectional region of said nylon filament, and not penetrating into an inner cross-sectional region of said nylon filament;
(b) removing the first batch of said nylon filament from said solution to provide a first dyed nylon filament having said outer cross-sectional region colored with said Indigotine dye and said inner cross-sectional region not colored with said Indigotine dye;
(c) affixing said first dyed nylon filament to the head of a first toothbrush;
(d) repeating steps (a), (b), and (c) for a second batch of a nylon filament and a second toothbrush, reusing the same said solution, to provide first and second toothbrushes each having the same amount of said Indigotine dye consistently penetrating into said nylon filament to color evenly the same outer cross-sectional region of said nylon filament in each toothbrush.
2. The method of claim 1 comprising the additional step of repeating steps (a), (b), and (c) for a third batch of a nylon filament and a third toothbrush, reusing the same said solution, to provide first, second and third toothbrushes each having the same amount of said Indigotine dye consistently penetrating into said nylon filament to color wenly the same outer cross-sectional region of said nylon filament in each toothbrush.
3. The method of claim 2 comprising the additional step of repeating steps (a), (b), and (c) for a fourth batch of a nylon filament and a fourth toothbrush, reusing the same said solution, to provide first, second, third, and fourth toothbrushes each having the same amount of said Indigotine dye consistently penetrating into said nylon filament to color evenly the same outer cross-sectional region of said nylon filament in each toothbrush.
4. The method of claim 1, wherein step (a) is performed at atmospheric pressure.
5. The method of claim 1, wherein said nylon filaments have an average diameter of between 0.127 and 0.356 mm (0.005 inches and 0.014 inches).
6. The method of claim 1, wherein said nylon filaments are monofilaments.
7. The method of claim 1, wherein said first batch of said nylon filament is immersed in said aqueous solution for less than 60 minutes.
8. The method of claim 1, wherein said first batch of said nylon filament weighs at least 4.8 kg (10 lbs.).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71619691A | 1991-06-17 | 1991-06-17 | |
| US716,196 | 1991-06-17 | ||
| PCT/US1992/004589 WO1992022699A1 (en) | 1991-06-17 | 1992-06-02 | Method for dyeing nylon filaments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2109935C true CA2109935C (en) | 2000-01-25 |
Family
ID=24877134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002109935A Expired - Fee Related CA2109935C (en) | 1991-06-17 | 1992-06-02 | Method for dyeing nylon filaments |
Country Status (12)
| Country | Link |
|---|---|
| EP (1) | EP0591361B1 (en) |
| JP (1) | JP2831465B2 (en) |
| KR (1) | KR100205843B1 (en) |
| CN (1) | CN1051118C (en) |
| AU (1) | AU663099B2 (en) |
| BR (1) | BR9206016A (en) |
| CA (1) | CA2109935C (en) |
| DE (1) | DE69216234T2 (en) |
| MX (1) | MX9202915A (en) |
| SG (1) | SG48428A1 (en) |
| WO (1) | WO1992022699A1 (en) |
| ZA (1) | ZA923986B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425767C (en) * | 2007-02-03 | 2008-10-15 | 王小芳 | Staining method of tip brush silk |
| CN103806307A (en) * | 2013-12-18 | 2014-05-21 | 慈溪市洁达纳米复合材料有限公司 | Preparation method for plating colorful dye on brush filaments |
| CN105033836B (en) * | 2015-07-06 | 2017-12-08 | 上海悦瑞电子科技有限公司 | A kind of technique processing method based on the colouring of 3D printing product surface |
| JP6232511B1 (en) * | 2017-03-03 | 2017-11-15 | 株式会社ショーワ | Denim product yarn manufacturing method, and denim product yarn, denim product fabric, and denim product manufactured by the method |
| CN107724117A (en) * | 2017-09-21 | 2018-02-23 | 晋江市明仨纺织品科技有限公司 | A kind of preparation method of automatic decolouring fiber |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2558992A (en) * | 1951-07-03 | Colored nylon article and method | ||
| US4802255A (en) * | 1987-08-10 | 1989-02-07 | Gillette Canada Inc. | Novel brush filaments |
| JP2770437B2 (en) * | 1989-07-10 | 1998-07-02 | 三井化学株式会社 | Rope dyeing method and rope dyeing |
-
1992
- 1992-06-01 ZA ZA923986A patent/ZA923986B/en unknown
- 1992-06-02 SG SG1996009602A patent/SG48428A1/en unknown
- 1992-06-02 WO PCT/US1992/004589 patent/WO1992022699A1/en active IP Right Grant
- 1992-06-02 CA CA002109935A patent/CA2109935C/en not_active Expired - Fee Related
- 1992-06-02 AU AU21862/92A patent/AU663099B2/en not_active Expired
- 1992-06-02 KR KR1019930703630A patent/KR100205843B1/en not_active IP Right Cessation
- 1992-06-02 JP JP5500726A patent/JP2831465B2/en not_active Expired - Fee Related
- 1992-06-02 DE DE69216234T patent/DE69216234T2/en not_active Expired - Lifetime
- 1992-06-02 BR BR9206016-1A patent/BR9206016A/en not_active IP Right Cessation
- 1992-06-02 EP EP92913760A patent/EP0591361B1/en not_active Expired - Lifetime
- 1992-06-16 CN CN92104692A patent/CN1051118C/en not_active Expired - Lifetime
- 1992-06-16 MX MX9202915A patent/MX9202915A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CN1051118C (en) | 2000-04-05 |
| MX9202915A (en) | 1993-01-01 |
| SG48428A1 (en) | 1998-04-17 |
| BR9206016A (en) | 1994-08-02 |
| AU2186292A (en) | 1993-01-12 |
| ZA923986B (en) | 1993-02-24 |
| DE69216234T2 (en) | 1997-06-05 |
| EP0591361B1 (en) | 1996-12-27 |
| EP0591361A1 (en) | 1994-04-13 |
| DE69216234D1 (en) | 1997-02-06 |
| WO1992022699A1 (en) | 1992-12-23 |
| AU663099B2 (en) | 1995-09-28 |
| CN1067936A (en) | 1993-01-13 |
| KR100205843B1 (en) | 1999-07-01 |
| EP0591361A4 (en) | 1994-05-18 |
| JP2831465B2 (en) | 1998-12-02 |
| JPH06503860A (en) | 1994-04-28 |
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| EEER | Examination request | ||
| MKLA | Lapsed |