GB2225028A - Process for the continuous impregnation of a nonwoven or needle felt web with an activation solution prior to metallisation - Google Patents
Process for the continuous impregnation of a nonwoven or needle felt web with an activation solution prior to metallisation Download PDFInfo
- Publication number
- GB2225028A GB2225028A GB8924595A GB8924595A GB2225028A GB 2225028 A GB2225028 A GB 2225028A GB 8924595 A GB8924595 A GB 8924595A GB 8924595 A GB8924595 A GB 8924595A GB 2225028 A GB2225028 A GB 2225028A
- Authority
- GB
- United Kingdom
- Prior art keywords
- web
- activation solution
- nonwoven
- needle felt
- activation
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Chemically Coating (AREA)
Description
1 Process for the continuous impregnation of a nonwoven or needle felt web
with an activation solution 2225.028 The invention relates to a process for the continuous impregnation of a nonwoven or needle felt web of electrically nonconductive synthetic fibres for the purpose of subsequent metallization.
Webs of nonwoven or needle felt are nowadays normally produced from synthetic fibres and are consequently electrically nonconductive. For many physical or chemical applications, nowadays highly porous substrate materials are used, which must have metallic properties. In order to be able to use such webs for such purposes, it is consequently necessary to lend them these metallic properties. These webs must therefore be provided with an electrically conductive, i.e. metallic coating. Since the synthetic fibres processed for the said webs are electrically insulating, and consequently unsuitable for a direct chemical metal deposition, they must first of all be "activated", i.e. firstly a catalytically active substance must be deposited on the fibre surface during the course of an activation operation. For the activation, activation solutions containing nobie metals are used thereby, which solutions consist in narticular of a colloidal or ionogenic palladium sol- --ion with an excess of tin-JI ions as reduction agent in hydrochloric acid.
An activation of nonwoven or needle felt webs with an activation solution on the basis of palladium/tin, the web being drawn through an impregnating station, is already known. Such a prior art arises, for example,
Patent Specification 3,631,055. However, procedure of drawing the web through the solution, the disadvantage occurs that, at the submersion of the web into the activation solution, there is inadequate excess of fresh activation solution on both sides of the web which can penetrate uniformly quickly into the pores of the web. According to this literature from German in such a activation moment of 2 reference, the procedure adopted according to the process is that ineach case there is only a relatively small quantity of activation s-olution in the bath and it is replenishedby a fresh activation solution at the rate at which the solution is removed from the bath by the impregnated web.
The present invention therefore to create a process for the activation of nonwoven and needle felt webs in which a completely uniform coating of the fibres, in particular also inside the nonwoven or needle felt, takes place reliably by means of an activation solution containing noble metal on the basis of palladium/tin.
According to the present invention there is provided a process for the continuous impregnation of webs of nonwoven or needle felt of electrically nonconductive -synthetic fibres, having a thickness of 1 to 10 mm and a porosity between 50% and 97% with an activation solution containing noble metal on the basis of palladium/tin for the purpose of subsequent metallization, the webs being fed at a rate of advancement of 1 to 10 m/min to the activation solution and submerged from above into the activation solution, wherein, at the moment of submersion of the web into the activation solution, an excess of fresh activation solution, which volumetrically corresponds to at least 5 times the volume of the pore volume to be impregnated in the submersion region of the web is provided on both sides of the web during the entire activation operation.
Preferably, said synthetic fibres of the nonwoven or needle felt web comprise one or more of polyethylene, polypropylene, polyacrylonitrile, polyester or polyamide.
In contrast to the given prior art, in the case of the procedure according to the provided activation solution invention, a large excess of is used and the web is submerged from above into-the activation solution. The web is thereby normally introduced vertically into the activation solution. The deviation from vertical intrcduction of the web into the activation solution is in this 2, 3 case not to be more than a maximum of 200, in order that the web is uniformly impregnated with the activation solution from both sides. Due to the existing excess of activation solution, it is thus achieved that, at each moment of submersion in (sic) of the web into the activation solution, fresh activation solution penetrates from both sides of the web horizontally into the latter and the pores of the web are also completely filled with fresh activation solution. The procedure adopted in practice is that the complete fresh activation solution is provided, for example in a tank of 0.3 to 0.5 m wide, in the case of a thickness of the fed web of 1 to 10 mm. With the procedure according to the invention it has also emerged that the gas bubbles formed inside the web during the activation operation are uniformly led away upwards within -the web; this has a likewise positive effect on a uniform activation of the web.
An embodiment of the invention will now be described by way of example with reference to the drawing.
A needle felt web of polyethylene 2, which has a porosity of 95%, a thickness of 3 mm, a length of 10 m and a width (lacuna) 50 cm, is unreeled from a supply reel 1 and submerged with the aid of two guide rollers 3 and 4, arranged vertically one above the other, vertically from above into the activation solution 7 and drawn through the impregnating tank 6, which is filled with a palladium/tincontainng activation solution. In the direct submersion region 5 of the web into the activation solution, there is always an adequate excess of fresh activation solution provided for the activation operation, which corresponds volumetrically to more than 5 times the pore volume of the needle felt web to be impregnated in that particular case. After activation has taken place, the needle felt web is centrifuged off in a centrifuge apparatus - not shownand subsequently chemically nickelized with a nickelizing solution (containing 30 9 NiC12.6H20, 35g NaH2P04.H20, 50 9 NH4Cl and 25 g NaOH per litre of solution). With the activated needle felt web, all fibres have been nickelized 4 completely uniformly. The individual fibres have subsequently also been galvanically reinforced on the nickel skin surrounding them. Such a uniformity of the nickelization has been confirmed by a microscopic examination of the galvanically reinforced needle felt examination accordingly also confirmed that the operation In contrast processes of a metallized needlefelt web, in which a wastage of 10 to 15% of non-uniformly nickelized web product arose, with the needlefelt web produced by the process according to the invention from now on a wastage of approximately 2% of not perfectly nickelized product has been found.
The advantage of the invention thus quite evidently -consists in that the coating of the fibres, in particular also inside the web, with the activation solution proceeds much more uniformly. As a result, a corresponding uniformity in the metallization of the activated synthetic fibre web is also achieved subsequently.
1 web. This preceding of the web had been performed to the formerly used production activation unif ormly.
Claims (3)
1. A process for the continuous impregnation of webs of nonwoven or needle felt of electrically nonconductive synthetic fibres, having a thickness of I to 10 mm and a porosity between 50% and 97% with an activation solution containing noble metal on the basis of palladium/tin for the purpose of subsequent metallization, the webs being fed at a rate of advancement of I to 10 m/min to the activation solution and submerged from above into the activation solution, wherein, at the moment of submersion of the web into the activation solution, an excess of fresh activation solution, which volumetrically corresponds to at least 5 times the volume of the pore volume to be impregnated in the submersion region of the web is provided on both sides of the web during the entire activation operation.
2. A process according to Claim 1, wherein said synthetic fibres of the nonwoven or needle felt web comprise one or more of polyethylene, polyacrylonitrile, polyester or polyamide.
polypropylene,
3. A process for the continuous impregnation of webs of nonwoven or needle felt of electrically nonconductive synthetic fibres, substantially as described herein, with reference to, and as illustrated in the accompanying drawing.
Published 1990 at The Patent Office. State House. 66 71 High Holborn, London WCIR4TP.Furthe- copies nikybeobtainedfroni The Patent Office Sales Branch, St Mar7 Cray. Orpington. Kent BR5 3RD Printed by Multiplex techniques Ad. St Maiy Cray, Kent. Con 1187
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19883837835 DE3837835C1 (en) | 1988-11-08 | 1988-11-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8924595D0 GB8924595D0 (en) | 1989-12-20 |
| GB2225028A true GB2225028A (en) | 1990-05-23 |
| GB2225028B GB2225028B (en) | 1993-01-13 |
Family
ID=6366707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8924595A Expired - Fee Related GB2225028B (en) | 1988-11-08 | 1989-11-01 | Process for the continuous impregnation of a non woven or needle felt web with an activation solution |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH02173271A (en) |
| DE (1) | DE3837835C1 (en) |
| FR (1) | FR2638768B1 (en) |
| GB (1) | GB2225028B (en) |
| SE (1) | SE503747C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595787A (en) * | 1989-07-29 | 1997-01-21 | Deutsche Automobilgesellschaft Mbh | Chemical metallization of electrically non-conducting porous substrates |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04124280A (en) * | 1990-09-17 | 1992-04-24 | Hitachi Chem Co Ltd | Instrument for measuring deposition speed of electroless plating |
| DE4033518C1 (en) * | 1990-10-22 | 1991-07-25 | Deutsche Automobilgesellschaft Mbh, 3300 Braunschweig, De | |
| DE4106696C1 (en) * | 1991-03-02 | 1991-09-19 | Deutsche Automobilgesellschaft Mbh, 3300 Braunschweig, De | Continuous prodn. of chemically metallised felt or foamed web - involves feeding web to catalytically activated soln. contg. lead and tin, drying, impregnating with metallising soln. etc. |
| DE4242443C1 (en) * | 1992-12-16 | 1993-06-03 | Deutsche Automobilgesellschaft Mbh, 3300 Braunschweig, De | Wet chemical metallising process for pre-activated plastic substrates - involves collecting used metallising soln., activating soln. and aq. washings for processing and recycling in the process |
| DE4444458C1 (en) * | 1994-12-14 | 1995-08-03 | Deutsche Automobilgesellsch | Metallic artificial substrate made of fleece, needle felt or foam |
| DE19711857C2 (en) * | 1997-03-21 | 2003-07-31 | Hoppecke Batterie Systeme Gmbh | Electrode frame made of needle felt material |
| RU2479681C2 (en) * | 2011-04-01 | 2013-04-20 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный университет технологии и дизайна" | Method of metallization flat materials |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1013674A (en) * | 1962-01-31 | 1965-12-15 | Ibm | Improvements in and relating to a continuous process and apparatus for forming a magnetic layer on a surface of a non-conductive web |
| GB1266193A (en) * | 1968-04-09 | 1972-03-08 | ||
| GB1360824A (en) * | 1971-06-30 | 1974-07-24 | Cottbus Textilkombinat | Metallisation process for inorganic and organic polymers |
| GB2196022A (en) * | 1986-09-12 | 1988-04-20 | Deutsche Automobilgesellsch | Process for the continuous impregnation of nonwoven or needle felt webs with an activating solution for electroless plating |
-
1988
- 1988-11-08 DE DE19883837835 patent/DE3837835C1/de not_active Expired - Lifetime
-
1989
- 1989-10-25 SE SE8903550A patent/SE503747C2/en not_active IP Right Cessation
- 1989-11-01 GB GB8924595A patent/GB2225028B/en not_active Expired - Fee Related
- 1989-11-02 JP JP28510389A patent/JPH02173271A/en active Pending
- 1989-11-06 FR FR8914490A patent/FR2638768B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1013674A (en) * | 1962-01-31 | 1965-12-15 | Ibm | Improvements in and relating to a continuous process and apparatus for forming a magnetic layer on a surface of a non-conductive web |
| GB1266193A (en) * | 1968-04-09 | 1972-03-08 | ||
| GB1360824A (en) * | 1971-06-30 | 1974-07-24 | Cottbus Textilkombinat | Metallisation process for inorganic and organic polymers |
| GB2196022A (en) * | 1986-09-12 | 1988-04-20 | Deutsche Automobilgesellsch | Process for the continuous impregnation of nonwoven or needle felt webs with an activating solution for electroless plating |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5595787A (en) * | 1989-07-29 | 1997-01-21 | Deutsche Automobilgesellschaft Mbh | Chemical metallization of electrically non-conducting porous substrates |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2638768B1 (en) | 1993-11-12 |
| DE3837835C1 (en) | 1990-02-22 |
| GB2225028B (en) | 1993-01-13 |
| SE8903550D0 (en) | 1989-10-25 |
| GB8924595D0 (en) | 1989-12-20 |
| FR2638768A1 (en) | 1990-05-11 |
| SE8903550L (en) | 1990-05-09 |
| SE503747C2 (en) | 1996-08-19 |
| JPH02173271A (en) | 1990-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19961101 |