US1806841A - Leather board - Google Patents
Leather board Download PDFInfo
- Publication number
- US1806841A US1806841A US1806841DA US1806841A US 1806841 A US1806841 A US 1806841A US 1806841D A US1806841D A US 1806841DA US 1806841 A US1806841 A US 1806841A
- Authority
- US
- United States
- Prior art keywords
- web
- fabric
- cellulose
- viscose
- solution
- 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 - Lifetime
Links
- 239000010985 leather Substances 0.000 title description 6
- 229920002678 cellulose Polymers 0.000 description 54
- 235000010980 cellulose Nutrition 0.000 description 54
- 239000001913 cellulose Substances 0.000 description 54
- 239000000243 solution Substances 0.000 description 52
- 239000004744 fabric Substances 0.000 description 46
- 229920000297 Rayon Polymers 0.000 description 28
- 238000004519 manufacturing process Methods 0.000 description 18
- 230000001376 precipitating Effects 0.000 description 18
- 239000002649 leather substitute Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 16
- 239000000047 product Substances 0.000 description 16
- 239000000969 carrier Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 239000004753 textile Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 238000001556 precipitation Methods 0.000 description 10
- 239000002253 acid Substances 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 6
- 238000005345 coagulation Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- 239000012467 final product Substances 0.000 description 4
- 239000012266 salt solution Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 229940106135 Cellulose Drugs 0.000 description 2
- 241001237728 Precis Species 0.000 description 2
- 241000681094 Zingel asper Species 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/02—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with cellulose derivatives
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
Definitions
- This invention has reference to a process of manufacturing artificial leather, from cellulose solutions, and it is intended to improve and simplify-the process of manu- 5 facture and to generally improve the quality of the product obtained.
- the methods heretofore employed for manufacturing artificial leather, and the like from cellulose solutions either necessitate high pressure or vacuum, in order to combine the cellulose with the web of -'material.
- attempts have been made to apply textile .fibers to a layer of cellulose by blowing, such layer being delivered from a receptacle having a spout or by a pouring device. All these methods are very complicated and require a considerable consumption of energy, and a complicated, system of apparatus. v
- the fabric upon which the viscose is deposited is a carrier web of textile material we have preferably made use of thin'and loosely woven cotton fabrics.
- the product After the precipitation the product obtainod'is further treated in the usual mannor.
- the viscosity of the cellulose solution should be regulated in accordance with the thickness of the coating to be obtained, so that, for example, in the case of comparatively thick coatings a solution of greater viscosity is to be employed than with thinner coatings. If it is desired to coat a fabric on both sides with cellulose, one may proceed by applying'cellulose solution upon a casting carrier, then passing the web of material above and along this solution, and applying such solution likewiseto the other, side of the fabric. By this means we are enabled to obtain in a single course of operation and with simple expedients a prodnot which may be used on both sides as leather board or artificial leather or the like.
- the web of textile fabric 1 is provided on both sides with the layer of viscose.
- the drum 6 which is rotated in the direction of the arrow 5,-and which serves as the casting support or carrier is immersed into the precipitating'bath 7, so that it is wetted with the preci itant, when it arrives below the caster 8 from which va solution of viscose. flows unto the drum 6 wetted with the precipitant.
- the web of fabric 1 is conducted for instance by means of the rollers 9 and 10, so that the layer of viscose may penetrate into the adjacent side of the Web of fabric.
- thickness being equal after coagulation of I the cellulose to a portion of the thickness of the final product, causing a web of fabric to pass 1n contact with said layer of cellulose solution atthe same speed as the rotating supporting surface then applying another supply of cellulose solution to the opposite side of the fabric in a layer having. a thickness being practically equal after coagulation of the cellulose. to the other portion of the total thickness of the final product, passing and guiding the two layers of cellulose solution and the intermediate web of fabric through a precipating bath and finally washing and drying the product obtained after coagulation.
Description
. May 26,1931.
PROCESS LEATH E. CZAPEK ET AL OF MANUFACTURING ARTIFICIAL LEATHER, ER BOARD AND THE LIKE File 24.
, WAXED C LOTH,
"Patented May 26, 1931 UNITED STATES PATENT (OFFICE,-
EMILCZAPEK AND 31 3mm WEINGAND, or BOMLITZ, GERMANY PROCESS OF MANUFACTURING ARTIFICIAL LEATHER, LEATHER BdARD, WAXED CLOTH AND THE 'LIKE Application filed October 2, 1924, Serial No. 741,294, and in Germany June 7, 1923.
This invention has reference to a process of manufacturing artificial leather, from cellulose solutions, and it is intended to improve and simplify-the process of manu- 5 facture and to generally improve the quality of the product obtained. The methods heretofore employed for manufacturing artificial leather, and the like from cellulose solutions either necessitate high pressure or vacuum, in order to combine the cellulose with the web of -'material. According to other methods attempts have been made to apply textile .fibers to a layer of cellulose by blowing, such layer being delivered from a receptacle having a spout or by a pouring device. All these methods are very complicated and require a considerable consumption of energy, and a complicated, system of apparatus. v
In the course of our researches it has been ascertained that it is possible to obtain from cellulose solutions .a very satisfactory prod- 7 not adapted for use as artificial leather, and the like in a very simple manner of manufacture by applying the cellulose to a carrier web of textile material from a spout, pouring or by the use of any appropriate means for coating :1. web of fabric with a cellulose solution, and by then causing the web with the coating thereon to pass in the usual manner through a precipitating liquor. The invention may be used in con- Inection with all cellulose solutions which are capable of precipitation by acid or salt solutions or by a mixture of the samein the well known manner. Of the various cellulose solutions we prefer to employ the vso-called viscose which is precipitated by salt solutions, though our invention is not.
restricted thereto. The fabric upon which the viscose is deposited is a carrier web of textile material we have preferably made use of thin'and loosely woven cotton fabrics.
It has been found to be advantageous in the manufacture of the product and to facilitate the thorough permeation of the web of textile material by the cellulose solution applied thereto by a suitable selection of the viscosity of the solution. For the same purpose the viscose rnay be given sulficlent time between the caster and the precipitating liquor to thoroughly enter into the web of textile fabric. This purpose may, for in- Y stance, be accomplished by causing the carrier web of fabric to pass in a horizontal or inclined direction for a certain distance and with suitable velocity before'entering the precipitating bath.
After the precipitation the product obtainod'is further treated in the usual mannor. The viscosity of the cellulose solution should be regulated in accordance with the thickness of the coating to be obtained, so that, for example, in the case of comparatively thick coatings a solution of greater viscosity is to be employed than with thinner coatings. If it is desired to coat a fabric on both sides with cellulose, one may proceed by applying'cellulose solution upon a casting carrier, then passing the web of material above and along this solution, and applying such solution likewiseto the other, side of the fabric. By this means we are enabled to obtain in a single course of operation and with simple expedients a prodnot which may be used on both sides as leather board or artificial leather or the like. Inorder to produce a rapid precipitation, the carrier orsupport may be wetted with the precipitant before applying the cellu lose solution. ()ur invention will be more particularly described with reference to the accompanying drawings showing by way of example an apparatus by means of which the new process may be carried out, in a diagrammatic manner in two forms of execution to Figures 1 and 2. In accordance with Figure 1 a product coated with cellulose on but one side is obtained for instance by causing a web of fabric 1, of cotton fiber 90.
for instance, to pass underneath the spout or caster 3 by means of the endless apron 2' 4 which is moved by any suitable means,.the viscose. being delivered from the caster 3 upon the web 1. Before the web of fabric 1 provided with the viscose layer isconducted into the precipitating bath 4, it is passed through a certain distance with suitable velocity, s0 as-to afford suflicient time to the viscoseto Well enter into the web of fabric. After having been led through the precipitating bath 4 the artificial sheet consisting of web of fabric and viscose is washed and dried in the ordinary manner, or is otherwise further treated.
In the arrangement of apparatus according to Figure 2 the web of textile fabric 1 is provided on both sides with the layer of viscose. With this end in view the drum 6 which is rotated in the direction of the arrow 5,-and which serves as the casting support or carrier is immersed into the precipitating'bath 7, so that it is wetted with the preci itant, when it arrives below the caster 8 from which va solution of viscose. flows unto the drum 6 wetted with the precipitant. Above-and along this coating of viscose supplied to the drum 6 the web of fabric 1 is conducted for instance by means of the rollers 9 and 10, so that the layer of viscose may penetrate into the adjacent side of the Web of fabric. Upon the other side of the web of fabric viscose is likewise applied by means of another casting device 11, so that the web of fabric 1 which is detached from the drum 6 below the level of the liquor by means of the roller 10 has been covered on both'sides with a'layer of viscose. After having been passed through a precipitating bath the product may then'be further treated in any suitable manner.
The invention has been described and shown in its broad aspects only, and it should be understood that it is susceptible of various modifications and changes and different kinds of apparatus may be used to apply and detach the coatings, and other changes may occur to the expert, without deviating from the spirit of the invention,
as set forth in the appended claims.
lVe claim 1. The process of manufacturing artificial leather and the like from viscose and similar cellulose solutions capable of precipitation by acids and salts, which consist in wetting, a rotary supporting surface with a precipitant, then applying cellulose solution onto said wetted surface in a layer of a upon the wetted surface of the roller a coating of the cellulose solution, guiding a carrying'stripof fabric about and beyond the coated surface of the roller, applying a coating of cellulose solution upon the opposite side of the carrying strip of fabric, guiding the coated strip through the bath of precipitating solution, washing and drying the product and then impressingsurface ornamentation into the hardened surface.
3. The process for manufacturing artificial leather and the like from viscose and similar aqueous cellulose solutions capable of precipitation by acids and salts which consists in wetting a rotating drum with a precipitant, then applying a layer of cellulose solution upon the wetted drum, passing a thin web of fabric in contact with said layer at the same speed as this drum, conducting the web and the layer of cellulose solution together through a precipitating bath by means ofthe rotating drum and finally washing and drying the coagulated product.
In testimony whereof, we afiix our signa- DR. EMIL GZAPEK. RICHARD WEINGAND.
tures.
thickness being equal after coagulation of I the cellulose to a portion of the thickness of the final product, causing a web of fabric to pass 1n contact with said layer of cellulose solution atthe same speed as the rotating supporting surface then applying another supply of cellulose solution to the opposite side of the fabric in a layer having. a thickness being practically equal after coagulation of the cellulose. to the other portion of the total thickness of the final product, passing and guiding the two layers of cellulose solution and the intermediate web of fabric through a precipating bath and finally washing and drying the product obtained after coagulation.
2. The process of manufacturing artificial
Publications (1)
Publication Number | Publication Date |
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US1806841A true US1806841A (en) | 1931-05-26 |
Family
ID=3421938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1806841D Expired - Lifetime US1806841A (en) | Leather board |
Country Status (1)
Country | Link |
---|---|
US (1) | US1806841A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2432752A (en) * | 1944-08-19 | 1947-12-16 | Continental Can Co | Method of forming laminated resin impregnated stock sheets |
-
0
- US US1806841D patent/US1806841A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2432752A (en) * | 1944-08-19 | 1947-12-16 | Continental Can Co | Method of forming laminated resin impregnated stock sheets |
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