US3809597A - Article for the finishing of leather - Google Patents

Article for the finishing of leather Download PDF

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US3809597A
US3809597A US00237696A US23769672A US3809597A US 3809597 A US3809597 A US 3809597A US 00237696 A US00237696 A US 00237696A US 23769672 A US23769672 A US 23769672A US 3809597 A US3809597 A US 3809597A
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Prior art keywords
leather
finish
finishing
coating
transfer
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US00237696A
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English (en)
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H Connett
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Ucote Corp
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Ucote Corp
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Filing date
Publication date
Application filed by Ucote Corp filed Critical Ucote Corp
Priority to US00237696A priority Critical patent/US3809597A/en
Priority to IL3970472A priority patent/IL39704A/xx
Priority to NL7208709A priority patent/NL7208709A/xx
Priority to AU43884/72A priority patent/AU4388472A/en
Priority to CA146,631A priority patent/CA965973A/en
Priority to IT2677472A priority patent/IT962643B/it
Priority to FR7225120A priority patent/FR2146748A5/fr
Priority to BE786345A priority patent/BE786345A/xx
Priority to DE2235239A priority patent/DE2235239A1/de
Priority to AR24314172A priority patent/AR196310A1/es
Priority to GB3378972A priority patent/GB1391308A/en
Priority to CS513872A priority patent/CS185611B2/cs
Priority to ES404976A priority patent/ES404976A1/es
Application granted granted Critical
Publication of US3809597A publication Critical patent/US3809597A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C11/00—Surface finishing of leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B32B9/025—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch comprising leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/06—Interconnection of layers permitting easy separation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/06—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/08—Natural leather
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • B32B2317/122—Kraft paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24025—Superposed movable attached layers or components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/2419—Fold at edge
    • Y10T428/24215—Acute or reverse fold of exterior component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31667—Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product

Definitions

  • the method may be carried out batch-wise employing discrete blocking and release layers for the transfer of finish coatings to individual leather pieces.
  • the method maybe performed continuously with the successive feed of leathers to be coated between a transfer web providing the desired released layer and a supporting web comprising the requisite backing or support.
  • Finishes are conventionally applied to leathers to impart protective coatings thereto, to level the color, and to minimize natural defects in the leather skins or hides.
  • finishes are generally applied by swabbing (brushing) and/or ⁇ spraying the finish coatings upon the leathers; in some limited cases, as in the application of polyurethane coatings for patent leathers or for other effects, the finish coatings may be applied by flow-coating operations. In all such instances, sufficient finish is applied to the leather substrate to provide a continuous film upon the leather epidermis.
  • each pass of the leathers to be finished through conventional finishing equipment subjects the same to pre-wetting and subsequent forced heat drying. Such operations tend to subject the collagen fibers to successive swelling and contraction, and impair the ultimate hand of the leather product.
  • the skins or hides employed in the manufacture of leathers differ from one another, not only in regard to the number, type and location of natural blemishes (scratches, scars, coarse grain, etc.) but also with respect to the character and quality of the skins or hides themselves.
  • Different sections of any given animal skin exhibit varying absorption of leather finishes, and hence take on differing shades.
  • leather made from a well nourished, healthy animal has different absorptive characteristics from that made from a animal which is not as Claims "ice f achieve employing conventional leather finishing operations.
  • FIG. l is a diagrammatic cross-sectional view, with the dimensions of the various materials exaggerated for purposes of illustration, showing the successive stages of the leather finishing method of the present invention
  • FIG. 2 is a schematic cross-section of an apparatus for carrying out the leather finishing method in a continuous manner
  • FIG. 3 is a diagrammatic cross-sectional view, with the dimensions of the various strata again exaggerated for purposes of illustration, showing a differing configuration ofthe backing and release layers which may be used when it is desired to perform the leather finishing method batchwise.
  • the method of the invention may be carried out either batch-wise or in a continuous manner to provide direct finishing of usable leathers in any quantity. Employing such method, it is unnecessary to maintain large inventories of leathers having differing colors or other finishes. Rather, any desired finish may be directly and immediately applied to the leathers in response to specific orders for products 4so Ifinished. Thus, in accordance with the .present invention inventories of the relatively inexpensive backing and release materials bearing releasable leather finish coatings need only'be maintained.
  • each leather substrate is introduced onto a continuous backing or supporting web having the finish-receptve surface contacting the substrate, the web is then fed with the leather substrate thereon into contact with a continuous release or transfer web having the releasable finish coating thereon, and the Ifinish coating is then transferred from the transfer web to the surfaces of the leather substrate and the supporting web superimposed therewith, substantially all of the coating being thereby offset from the transfer web to the leather surfaces.
  • the transfer web is thereafter separated from the supporting web and the lfinish-coated leather substrate, andthe latter thereafter removed from the supporting web.
  • the method may readily be carried out batch-wise.
  • the layers thus providel a preformed finishing assembly which, upon insertion of Vone or more leather substrates as a filling therebetween, may be pressed sandwich-like to transfer the finish coating from the release layer to the juxtaposed surfaces ofthe f Aj l 3128092597 i' Y ,proportion of the Yconventie ,nel leather finishing .ccittlnQsi- ⁇ tions) comprise blends of acrylic polymers, spirit-soluble dyes, pigments, waxes and other additives for achieving the desired appearance and characteristics of the finished leather.
  • Materials so useful when applied by the method of the present invention include acrylic resins such as those marketed by IRohm and Haas as fPifnaP resins (e.g., HA-65, E-32, E-760, E-826, AC'34, B-15, B-85, -B-88, LT-76, vLT-87 and :ASE-60); yspirit soluble. dyes such as 'Rohm and HaasfLS serie's,'K. J..
  • the acrylic resins of, theaboveY types are' polymers of acrylic acid; methacrylic acid; alkyl acrylates or alkyl methacrylates, the alkyl moieties of which'este'r's may have widely varying chain lengths; and/or acrylarni'desor methacrylamides.
  • Acrylic'resin interpolymers within'these categories which are useful in the process of the present invention are disclosed, for example, inl U.S. Pats. Nos;
  • the preceding acrylic finishes are customarilyy employed in conjunction with a lacquer or'v lacquer emulsion top coat for drying of the acrylic Ifilm.
  • Such coats which may additionally be formed in accordance' withfthe. method of the present invention, may' suitably utilizeV nitrocellulose dispersions such as Rohm and :Haas' Hydrholac WC-230 (or WC-300), Ortho-Clear: 260 (or 26l-D), or Chemical Coating Corporations Trans E series of coatings.
  • the polyurethane resin finish coatings useful vin the present process comprise nitrocellulose lacquers 'of elas- ⁇ I Accordingly, vthe term finish coating as used herein corn-v leather substrate and the backing layer. Inventories of such individual finishing assemblies may thus be maintained by tanners, shoe manufacturers, or other users, and employed for finishing operations on demand. 'The present method may be employed, in the finishing of leather substrates of any suitable type.
  • finish coatings may be applied by the method of theinvention to leather skins; hides; die-cut leather pieces in various shapes, e.g., shoe uppers, quarters, tips, Vamps, straps, or lining quarters and vamps; all leather goods, e.g.wal lets, lkey cases, eyeglass cases, billfolds, handbags .or belts; garments; cut upholstery patterns, or the like.
  • leather substrates or leather pieces includevall such leather materials.
  • the method hereof ma'y also be utilized'to apply any conventional film-forming finishes to leather substrates.
  • it can be used for the application ofeither the well known non-glazeA acrylic emulsion finish coatings or polyurethane resin finish coatings (employed the manufacture of patent or easy-care leathers).
  • the acrylic emulsion finishes which may be applied by the method hereof (and which comprise the greatest prehends anyl such conventionalv film-formingwlfeather' finishing composition.
  • FIG. 1 of the drawing The successiveisve stages of a preferred embodiment of the present invention are illustrated in FIG. 1 of the drawing. As shown in Stage A thereof, leathersubstrates 11vt o be finished are placed between a backing or :supporting layer 12 and a release or transfer layer 13. 'Ihe supporting layer vhas a finish-receptive surface 14y which may, if desired, comprise an upper stratum or coating thereon.
  • a ikraft paper for the supporting layer, which paper may be coated with an acrylic resin Transfer layer 13, on the other hand, is generally the ⁇ composite of a carrieri15, a permanent release stratum 1 6, and a releasable finish coating 17 thereon.l'l. ⁇ h elca'r' r ier 1 5 may suitably be a paper/or similar sheet material.
  • the permanent'Y release stratum 1 6 comprisesfa coating ⁇ of a material upon which a conventional finishing'cornpositionmay be releasably coated yetwhich will notitieg offset from the transfer layer upon transfer of .the finish-v ing composition to the ,leather substrates M11 andthe sup,v
  • Polymethylsiloxane 'coatings may, 'for example, be Vutilized asthe permanent release stratum 1,6 of the transfer material.
  • otherY siloxanes or other known release coatings may be similarly useful.
  • Transfer layers found particularly satisfactory include those having a polysiloxane coating and commercially available from S. D. Warren Company under the designations Transcote Patent A, Stripkote Vel C 2S Gloveskin and Transcote ER.
  • the releasable finishing coating 17 may comprise any of the above noted leather finishing compositions. Such compositions normally adhere to the release stratum 16 on carrier 1S and are not offset therefrom when, for example, the layer is a continuous web and is rolled on itself. When, however, the layer is superimposed with the leather substrates and the finish-receptive surfaces of the supporting material and suicient heat and pressure are applied thereto, the finish coating is substantially entirely transferred or offset from release stratum 16 to the last mentioned surfaces.
  • Superimposition of the respective layers in a sandwichlike assembly is illustrated in'Stage B of FIG. 1.
  • the releasable finish coating 17 of the transfer layer is thus pressed against both the outer surfaces of the leather substrates 11 and the adjacent, juxtaposed finish-receptive surface 14 of the supporting layer 12.
  • the superimposed layers are simultaneously squeezed together and heated to effect transfer of the finish coating.
  • the respective layers are heated to temperatures of from about 150 to 200 C. and squeezed together to effect transfer of the finish composition.
  • the supporting layer 12 and carrier 15 are thereafter separated.
  • the finish coating is thus transferred to the leather substrates 11', forming coatings 18 and 18a thereon and being offset onto the juxtaposed surfaces 21a, 2lb and 21e of the supporting layer 12.
  • Substantially all of the finish coating 17 is thus transferred from layer 13 to the juxtaposed surfaces of the leather substrates and the finish-receptive transfer layer.
  • FIG. 2 of the drawing A preferred form of apparatus for vcarrying out the present method by a continuous operation is schematically illustrated in FIG. 2 of the drawing.
  • the supporting layer 12 is fed as a continuous web from a feed roll 22 into contact with the transfer layer 13 fed from a feed roll 23.
  • the respective continuous webs may be fed over suitable idler rolls, such as rolls 24 and 25.
  • the leather substrates 11 to be finished lare intermittently fed onto the continuous web 12, thus forming the assembly illustrated in Stage A of FIG. 1.
  • the superimposed layers are thereafter fed into the nip of rolls 26 and 27, the former of which is a heated steel roll and the latter of which is an adjustable pressure roll. These rolls squeeze the several layers into the sandwich-like assembly illustrated in Stage B of FIG.
  • the heated roll 26 contacts only the transfer web 13. In this manner, undue heating and consequent damage of either the leather substrates 11 or the paper-supporting web 12 is avoided.
  • the web assemblage is thereafter passed over a support roll 28, which may be used to adjust the tensionron the transfer web, and the latter is stripped from the assembly and wound on a rewind roll 29.
  • the assembly removed from the support roll corresponds to that shown in Stage C of FIG. 1 of the drawing.
  • the stripped transfer web or release paper, designated 13 in FIG. 2 may thereafter be removed from roll 29, re-coated with additional finish, and mounted on feed roll 23 for further finishing operations.
  • the supporting web carrying the same is passed through the nip of a further heated roll 31 and adjustable pressure roll 32.
  • the finish layer upon each leather substrate is thus ironed to impart the required gloss and hand to the leather.
  • the thus coated and cured finished leathers, designated 11', are removed from the supporting'web, and
  • the finished leathers may readily be stripped from the supporting web without leaving any residual or frayed edges or flashing from the finish coating adhering to the edges of the coated leather surfaces.
  • finish layer breaks evenly along the edges of the leather, providing a uniform coating which does not require any trimming and leaving the balance of the finish on the kraft paper supporting web. After winding up the latter, the web may be discarded or suitably treated for recovery of the excess finish coating.
  • a finishing assembly such as illustrated in FIG. 3 is preferably employed.
  • Such assembly incorporates an individual discrete backing layer 120 and release layer ⁇ 130, which have areas of the same order of magnitude as the leather substrate to be finished therewith and possess substantially the same dimensions.
  • the sheets and 130 are secured to one another along an abutting edge of each layer by any suitable means, as by folding over or hinging the margin 22 of the supporting layer 120 and cementing, stapling or otherwise securing the same to the corresponding margin of layer 130.
  • the discrete sheet materials may readily and economically be utilized to provide a finishing assembly into which the leather substrates 110 may be inserted and with which they may be finished.
  • the respective sheet material layers 120 and 130 may have the same structure and composition as supporting and transfer layers 12 and 13, respectively.
  • the respective sheet material layers 120 and 130 may have the same structure and composition as supporting and transfer layers 12 and 13, respectively.
  • release layer may comprise a permanent release Y stratum and a releasable finish coating 170 corresponding in composition, respectively, to strata 16 and 17 of transfer layer 13 shown in FIG. l.
  • the finishing assembly of FIG. 3 is employed in the samemanner as illustrated in the successive stages of FIG. 1.
  • the plural layers of the assembly are pressed together and, desirably, heated by merely being fed between a pair of rolls such as rolls 26 and 27 of the apparatus embodiment shown in FIG. 2.
  • the assembly of FIG. 3 may be used in connection with any device having a pair of nip rolls and need not have any associated winding or unwinding equipmet such as is involved in the apparatus shown in FIG. 2.
  • V IUse of the batch-wise finishing assembly of FIG. 3 i s particularly advantageous when it is desired to finish relatively srnall, pre-cut leather pieces such .as shoe uppers.
  • leather finishing may be carried out employing this embodiment of the invention employing relatively simple and inexpensive equipment and with relatively increased ease of handling.
  • use of previously prepared finishing assemblies incorporating any desired finish coatings provides improved flexibility and control of leather finishing operations.
  • EXAMPLE 1 Abrown kraft paper web (50 weight) is coated with 8 cc./ft.2 of an adhesive coating consisting lof the following:
  • a further continuous transfer or release web having finish-receptive polysiloxane outer surfaces (S. D. Warrens Stripkote Vel C 2S Gloveskin) is coated with a finish coating deposited from the following solution:
  • Nitrocellulose emulsion of a plasticized polyacrylate incorporating a spirit-soluble dye, a sulfonated castor oil, and a high boiling solvent, and having a solids content of about 4.9% by weight (Chemical Coatings Co. Trans E 1688) 400 Clear nitrocellulose emulsion of a plasticized polyacrylate incorporating a sulfonated castor oil and a high boiling solvent (Chemical Coatings Co. Clear Slip 1230) Aqueous nitrocellulose emulsion of a relatively soft,
  • the finish coating is applied to the transfer web and the web is thereafter dried, e.g., by forced air drying at 160 C. forv 3 minutes, after which it is cooled to provide a finish layer approximately 0.5-0.75 mil thick on one face of the transfer web.
  • the thus coated transfer web 13 and supporting web 12 are passed through pressure rolls 26 and 27, as shown in FIG. 2, the composite assemblage being heated at a temperature of 150 C. for about two seconds.
  • the finish coating is thus stripped from web 13 and deposited on the juxtaposed surfaces of the leather substrates 'and the intermediate portions of the supporting web 12.
  • the remaining transfer paper web 13 is then rewound on roll 29 for recoating.
  • Supporting web 12 bearing the coated leather substrates 11 is then passed betweenthe pressure rolls 31 and 32, wherein it is heated to 15G-200 C. for about 2 seconds.
  • the polyacrylate coating is thus smoothed and ironed and a desired final gloss imparted to the coated leather ⁇
  • the leather substrates are thereafter strippedfrom the supporting web and the finished leathers removed without the formation of any residual frayed coated edges.
  • Example 1 is repeated utilizing the following composition for forming the finish coating on the transfer web:
  • EXAMPLE 9 Parts TiOz in the rutile form (Rohm and Haas Primal White 1687) 40 Primal B-l 30 Primal B-88 5 Water 5 EXAMPLE 10 Parts Primal -E-32 25 Primal AC-34 25 LS-3004 5 Water 20 EXAMPLE 11
  • the coating 17 formed on release stratum 16 and thereafter transferred in accordance with the present invention is preferably formed bythe appli. cation of a two stratum coatings.
  • Compositions which may be utilized in forming the initial stratum ⁇ of. such a coating include the following:
  • the second stratum is then dried, e.g., at 170 C. for three minutes, to cross-link the acrylic resin,and the transfer coating 17 thereafter transferred ⁇ to'leather ⁇ substrates as described in Example l above.
  • EXAMPLE l2 Further leather finishes are applied in accordance with Example 1, by the transfer of polyurethane finish coat- 10 ings formed by application of the following formulation to release stratum 16:
  • EXAMPLE 13 A finishing assembly of the type illustrated in FIG. 3v
  • release layer is provided by the successive coating of a release paper having a finish-receptive polysiloxane outer surface (S. D. Warrens Transcote ER) with the following finish mixes:
  • Aqueous nitrocellulose emulsion of an acrylic polymer (Rohm and Haas Hydrholac WC300) A self-crosslinking acrylic emulsion (Rohm and Haas E-760) 3 Aqueous wax dispersion (Rohm and Haas Primal
  • the preceding coatings are successively applied and dried lto form a film of from 0.5 to 0.75 mil on the polysiloxane outer surface.
  • a coated roll of such material is then slit into any desired width, e.g., from l0" to 4', for forming the finishing assemblies.
  • a kraft paper backing layer isprepared from an appropriate roll source, the web being slit approximately 1" wider than the coated release paper and the 1" overlap being folded over the margin of the coated release paper and glued along the abutting edge as at 22 in FIG. 3 to provide a hinge-like assembly. Such assembly is then cut into varying lengths, e.g., from ⁇ 12" to 7', depending upon the size of the leather substrates to be finished, and the finishing assemblies thus completed.
  • Each leather substrate to be laminated is then precoated with a suitable adhesive (e.g., the adhesive precoat described in Example 1, or a similar adhesive containing van acrylic adhesive such as Primal LT-87 or E-826) and inserted into the finishing assembly.
  • a suitable adhesive e.g., the adhesive precoat described in Example 1, or a similar adhesive containing van acrylic adhesive such as Primal LT-87 or E-826) and inserted into the finishing assembly.
  • the assembly is fed through a nip roll device to apply the desired heat and pressure to the superposed strata and effect the desired transfer of the finish coating. Good results are obtained when one roll is heated to about 30G-400 F. with a line pressure of about 80-150 lbs. per linear inch, the other pressure roll having a durometer of about 40-60.
  • the sandwich fed through the roll is thereafter opened, the leather substrate to which the finish coating has transferred is removed, and the remaining backing and release layers are discarded.
  • the coated leather is then fed through the same nip rolls or other pressure rolls (e.g.,
  • Example 1 rolls 31 and 32 as described in Example 1) to complete the cure of the finish coating if necessary and ,toy iron and impart the desired final gloss to the finish.
  • An article for the finishing of leather which comprises a pair ofy discrete sheet material'layershaving s'ubstantially the same major dimensions'and beingsecured tofone another along an abutting' edge of each saidv layer, thefirst of said layers comprising a backing layer :having a finish-receptive surface thereon and the second of said layers comprising a release layer having v'a releasable leather finish coating, and said layers being capable of being pressed into a sandwich-like assembly with the finish-receptive surface and the releasable leather finish coating facing one another with av leather substrate to.A be finished interposedtherebetween to transfer thel finish coating from the release layer to the juxtaposed surfaces of the leather substrate and the backing '.layer;
  • said release .layer comprises a release paper having a nish-receptivesfpolysiloxane outer surface, and wherein the releasable leather finish coating is coated on said surface.
  • V leather'iinish coating is provided by the succcsive coating of a nitrocellulose emulsion and an acrylic resin emulsion on-a release paper.
  • An article for the nishingof leather which comprises a pair of discrete paper sheets having substantially the same major dimensions and being secured to one -another along an abutting .edge of-eachsaid sheet, one of said sheets 'comprising a release paper having .a finish-receptive polysiloxane outer surface andtbearing a ,releasable acrylic resin leather finish coating on saidsurfaeeaid sheets -being capable ofvbengpressed into a.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
US00237696A 1971-07-19 1972-03-24 Article for the finishing of leather Expired - Lifetime US3809597A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US00237696A US3809597A (en) 1971-07-19 1972-03-24 Article for the finishing of leather
IL3970472A IL39704A (en) 1971-07-19 1972-06-16 Method of finishing leather
NL7208709A NL7208709A (cs) 1971-07-19 1972-06-23
AU43884/72A AU4388472A (en) 1971-07-19 1972-06-26 Finishing leather
IT2677472A IT962643B (it) 1971-07-19 1972-07-07 Metodo per la rifinitura del cuoio
CA146,631A CA965973A (en) 1971-07-19 1972-07-07 Finishing leather assembly and method for making
FR7225120A FR2146748A5 (cs) 1971-07-19 1972-07-11
BE786345A BE786345A (fr) 1971-07-19 1972-07-17 Procede de finissage du cuir
DE2235239A DE2235239A1 (de) 1971-07-19 1972-07-18 Verfahren zur zurichtung von leder.-
AR24314172A AR196310A1 (es) 1971-07-19 1972-07-19 Procedimiento para dar acabado al cuero
GB3378972A GB1391308A (en) 1971-07-19 1972-07-19 Methods of finishing leather
CS513872A CS185611B2 (en) 1971-07-19 1972-07-19 Finishing of leather by transmission and device for making this method
ES404976A ES404976A1 (es) 1971-07-19 1972-07-19 Procedimiento para dar acabado al cuero.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16361171A 1971-07-19 1971-07-19
US00237696A US3809597A (en) 1971-07-19 1972-03-24 Article for the finishing of leather

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US05/387,942 Continuation-In-Part US3930921A (en) 1971-07-19 1973-08-13 Method of finishing leather

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US (1) US3809597A (cs)
AR (1) AR196310A1 (cs)
AU (1) AU4388472A (cs)
BE (1) BE786345A (cs)
CA (1) CA965973A (cs)
CS (1) CS185611B2 (cs)
DE (1) DE2235239A1 (cs)
ES (1) ES404976A1 (cs)
FR (1) FR2146748A5 (cs)
GB (1) GB1391308A (cs)
IL (1) IL39704A (cs)
IT (1) IT962643B (cs)
NL (1) NL7208709A (cs)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932253A (en) * 1974-06-03 1976-01-13 Western Electric Company, Inc. Method for forming a magnet pattern on magnetic memory circuit cards
WO2006136550A1 (de) * 2005-06-20 2006-12-28 Ledertech Gmbh Schallisolierendes material
US20190177912A1 (en) * 2017-12-13 2019-06-13 Nike, Inc. Method and system for plasma treatment
EP3572234A1 (en) * 2018-05-24 2019-11-27 Agfa Nv Decorated natural leather
US10648047B2 (en) 2014-06-16 2020-05-12 Bayerische Motoren Werke Aktiengesellschaft Method for producing breathable leather material and use of leather material produced according to said method
IT202000003326A1 (it) * 2020-02-19 2021-08-19 Bergi S P A Macchina per la lavorazione di pelli

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597505B1 (fr) * 1986-04-16 1989-05-26 Anver Procede d'obtention de pieces finies en cuir a partir d'elements en cuir brut par application par transfert des produits d'appret et des produits de finissage
DE3720776A1 (de) * 1987-06-24 1989-01-12 Helmuth Schmoock Ledermaterial sowie verfahren und vorrichtung zu seiner herstellung
DE9406225U1 (de) * 1994-04-14 1994-08-11 Schaefer, Philipp, 30519 Hannover Vollnarbiges Naturleder
IT1278907B1 (it) * 1995-04-27 1997-11-28 Gidue Srl Metodo per la mobilitazione di pelli ed impianto atto a realizzare tale metodo di nobilitazione
DE29902635U1 (de) 1999-02-15 1999-05-06 Schaefer, Philipp, 30519 Hannover Mit einer Zurichtung versehenes Narbenleder

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3932253A (en) * 1974-06-03 1976-01-13 Western Electric Company, Inc. Method for forming a magnet pattern on magnetic memory circuit cards
WO2006136550A1 (de) * 2005-06-20 2006-12-28 Ledertech Gmbh Schallisolierendes material
US10648047B2 (en) 2014-06-16 2020-05-12 Bayerische Motoren Werke Aktiengesellschaft Method for producing breathable leather material and use of leather material produced according to said method
US20190177912A1 (en) * 2017-12-13 2019-06-13 Nike, Inc. Method and system for plasma treatment
EP3572234A1 (en) * 2018-05-24 2019-11-27 Agfa Nv Decorated natural leather
WO2019224097A1 (en) * 2018-05-24 2019-11-28 Agfa Nv Decorated natural leather
CN112118963A (zh) * 2018-05-24 2020-12-22 爱克发有限公司 装饰的天然皮革
CN112118963B (zh) * 2018-05-24 2022-08-02 爱克发有限公司 装饰的天然皮革
US11801700B2 (en) 2018-05-24 2023-10-31 Agfa Nv Decorated natural leather
IT202000003326A1 (it) * 2020-02-19 2021-08-19 Bergi S P A Macchina per la lavorazione di pelli

Also Published As

Publication number Publication date
IL39704A0 (en) 1972-08-30
BE786345A (fr) 1972-11-16
FR2146748A5 (cs) 1973-03-02
NL7208709A (cs) 1973-01-23
GB1391308A (en) 1975-04-23
ES404976A1 (es) 1975-07-16
CS185611B2 (en) 1978-10-31
CA965973A (en) 1975-04-15
AU4388472A (en) 1974-01-03
DE2235239A1 (de) 1973-02-01
IT962643B (it) 1973-12-31
AR196310A1 (es) 1973-12-18
IL39704A (en) 1975-10-15

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