US3068130A - Urea coated stiffening sheet - Google Patents

Urea coated stiffening sheet Download PDF

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Publication number
US3068130A
US3068130A US84066759A US3068130A US 3068130 A US3068130 A US 3068130A US 84066759 A US84066759 A US 84066759A US 3068130 A US3068130 A US 3068130A
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United States
Prior art keywords
sheet
urea
tissue
stiffening
blank
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Gaquin John Harold
Ronald W Morse
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Beckwith Arden Inc
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Beckwith Arden Inc
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Priority to US84066759 priority Critical patent/US3068130A/en
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    • 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
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • 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]
    • Y10T428/31942—Of aldehyde or ketone condensation product
    • Y10T428/31949—Next to cellulosic
    • Y10T428/31964—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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric layer
    • Y10T442/3504—Woven fabric layers comprise chemically different strand material
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3707—Woven fabric including a nonwoven fabric layer other than paper
    • Y10T442/378—Coated, impregnated, or autogenously bonded
    • Y10T442/3813—Coating or impregnation contains synthetic polymeric material

Definitions

  • This invention comprises a new and improved sheet material for stiffening parts of shoes and which, although coated or impregnated with a partially condensed and normally tacky urea compound, is, in fact, non-tacky in handling, storage and shipment and until ready for actual assembly in a shoe upper.
  • Sheet material carrying such urea compounds have been used successfully heretofore in stiffening box toes and counters but the material has been subject to the very serious fault that in warm and humid weather it will turn tacky, making it inconvenient and unpleasant to handle and difficult to separate when packaged in stacked formation.
  • the present invention solves this long-standing problem and makes available a stiffening material that has also other unexpected advantages.
  • the invention consists in covering or laminating upon the urea-carrying surfaces of the base sheet a porous, absorbent tissue or membrane. This is applied so that it blends and merges with the sheet material and its effect is completely to mask all trace of tackiness which would otherwise be due to the presence of the urea compound. If the sheet material is coated on one surface only with the urea compound, it is necessary to cover only that surface of the material with the tissue. If the material is impregnated or coated on both surfaces, the tissue is applied to both surfaces thereof.
  • the material in that form may be handled as so much dry fabric having appreciably no tackiness and no tendency to block when packaged in the form of stacked blanks.
  • the urea component of the material of our invention is caused to undergo condensation or polymerization to a final hard insoluble-infusible stage by the action of a catalyst.
  • Resins of this type are well-known in the art and one which is suitable for purposes of this invention is a water-soluble A-stage urea formaldehyde resin, such as Urac 180 sold by American Cyanamid Company, and which may be catalyzed effectively with a solution of ammonium chloride.
  • Urac 180 sold by American Cyanamid Company
  • FIG. 1 is a diagrammatic view suggesting the steps of preparing sheet material with a single coated surface.
  • FIG. 2 is a similar view suggesting the steps of preparing sheet material impregnated or coated on both surfaces.
  • FIG. 3 is a plan view of a box toe blank embodying the invention.
  • FIG. 4 is a view in cross section on an enlarged scale showing the component parts of the blank of FIG. 3.
  • the base sheet fabric employed may be double or single napped flannel, burlap, felt, or the like and in FIG.
  • FIG. 2 Substantially the same process is illustrated in FIG. 2 except that in this case the sheet material drawn from the coil it) is completely immersed in a bath 16 of urea solution so it emerges with both surfaces coated. From the bath 16 the coated material passes through the heater 12 wherein both surfaces are partially dried to a condition of tackiness. The sheet is then passed between squeeze rolls 14 and at this point tissue drawn from the coil 13 is applied to the lower surface of the sheet while similar tissue is drawn from the overhead coil 17 and applied to the upper surface of the sheet. Finally the laminated material is wound in a coil 18.
  • the sheet material thus prepared may now be cut into blanks for use in stiffening box toes or counters.
  • a box toe blank as shown in FIG. 3 wherein the base textile fabric 20 is shown has united to a coextensive ply 21 of tissue, the latter being shown as partially separated from the base fabric.
  • the blank, thus prepared may be shipped and handled as conveniently as a piece of lightlysized fabric. When ready for actual use it may be brushed or dipped in an ammonium solution and this is distributed over the entire surface of the blank and retained in and by the porous and absorbent tissue ply 21 in the most favorable position for causing rapid final polymerization of the urea compound and hardening of the blank in the shape which has been imparted to it by the enclosed last.
  • urea formaldehyde as a satisfactory and desirable stiffening compound
  • any other urea solution or compound having similar characteristics such as thiourea-aldehyde, melamine-aldehyde or phenol-aldehyde.
  • Ammonium phosphate, phosphoric acid, hydrochloric acid or their equivalents may also be employed as the catalyst component if desired.
  • tissue for purposes of this invention are readily available in the open market and may be described as thin, light weight and translucent as well as porous and absorbent in texture, more absorbent than the base fabric.
  • the tissue may be of paper stock, or cotton fabric or other cellulose sheet material of medium weight or lighter.
  • thermoplastic stiffening compound As a further important embodiment of our invention, we employ a base sheet impregnated with a thermoplastic stiffening compound.
  • the sheet material drawn from the coil 10 instead of being untreated cotton, for example, may carry such thermoplastic component as cellulose acetate or nitrate, ethyl cellulose, methacrylate,
  • the blank is activated by the application of the liquid catalyst, placed in the shoe upper and molded under heat and pressure while the urea component is converted by condensation to its hard insoluble stage.
  • the action of the urea compound is to supplement the more brittle stiffening of the thermoplastic component and obviate the formation of cracks in the finished toe box or counter, providing a box toe in the shoe superior in respect to life and texture to those heretofore known.

Description

Dec. 11, 1962 J. H. GAQUIN ET AL 3,058,130
UREA-comm STIFFENING SHEET Filed Sept. 17, 1959 ABSORBENT TISSUE BASE SHEET HAVING RMOPLASTIC REGNANT FIG. 4
United States Patent Ce 3,068,130 UREA COATED STIFFENING SHEET John Harold Gaquin, Haverhill, and Ronald W. Morse, Newton, Mass., assignors to Beckwith-Arden Inc., Dover, N.H., a corporation of New Hampshire Filed Sept. 17, 1959, Ser. No. 840,667 1 Claim. (Cl. 154--46) This invention comprises a new and improved sheet material for stiffening parts of shoes and which, although coated or impregnated with a partially condensed and normally tacky urea compound, is, in fact, non-tacky in handling, storage and shipment and until ready for actual assembly in a shoe upper.
Sheet material carrying such urea compounds have been used successfully heretofore in stiffening box toes and counters but the material has been subject to the very serious fault that in warm and humid weather it will turn tacky, making it inconvenient and unpleasant to handle and difficult to separate when packaged in stacked formation.
The present invention solves this long-standing problem and makes available a stiffening material that has also other unexpected advantages. In one aspect the invention consists in covering or laminating upon the urea-carrying surfaces of the base sheet a porous, absorbent tissue or membrane. This is applied so that it blends and merges with the sheet material and its effect is completely to mask all trace of tackiness which would otherwise be due to the presence of the urea compound. If the sheet material is coated on one surface only with the urea compound, it is necessary to cover only that surface of the material with the tissue. If the material is impregnated or coated on both surfaces, the tissue is applied to both surfaces thereof.
The material in that form may be handled as so much dry fabric having appreciably no tackiness and no tendency to block when packaged in the form of stacked blanks.
The urea component of the material of our invention is caused to undergo condensation or polymerization to a final hard insoluble-infusible stage by the action of a catalyst. Resins of this type are well-known in the art and one which is suitable for purposes of this invention is a water-soluble A-stage urea formaldehyde resin, such as Urac 180 sold by American Cyanamid Company, and which may be catalyzed effectively with a solution of ammonium chloride. It has been found that the presence of the porous tissue lamination of our improved stiffening material has the important advantage of retaining the liquid catalyst upon and in the most effective position for activating the urea compound and causing its final polymerization to take place. That is to say, the tissue being porous and absorbent tends to prevent the liquid catalyst from running off the impregnated base sheet and instead holds the catalyst evenly distributed against the incured resin, thus promoting a much more evenly cured piece of stiffened material.
These and other features and characteristics of the invention will be best understood and appreciated from the following disclosure of a preferred manner of preparing the sheet material as shown in the accompanying drawings in which,
FIG. 1 is a diagrammatic view suggesting the steps of preparing sheet material with a single coated surface.
FIG. 2 is a similar view suggesting the steps of preparing sheet material impregnated or coated on both surfaces.
FIG. 3 is a plan view of a box toe blank embodying the invention.
FIG. 4 is a view in cross section on an enlarged scale showing the component parts of the blank of FIG. 3.
The base sheet fabric employed may be double or single napped flannel, burlap, felt, or the like and in FIG.
3,068,130 Patented Dec. 11, 1962 1 this is shown as being drawn from a coil 10. From this it is led over an applying roll 11 partially immersed in a bath of partially condensed urea formaldehyde solution which is effective to coat the lower surface of the sheet. The coated sheet then passes to a dryer 12 wherein the liquid coating is partially dried so that the fabric issues from the heater in a slightly tacky condition. It then passes between squeeze rolls 14 and at this point a web of tissue is drawn from a coil 13 and combined with the still tacky sheet. From the squeeze rolls 14 the laminated sheet is wound into the coil 15. The tissue drawn from the coil 13 as already stated is porous, soft and absorbent so that when pressed against the tacky surface of the base sheet it merges and blends into it with permanent adhesion.
Substantially the same process is illustrated in FIG. 2 except that in this case the sheet material drawn from the coil it) is completely immersed in a bath 16 of urea solution so it emerges with both surfaces coated. From the bath 16 the coated material passes through the heater 12 wherein both surfaces are partially dried to a condition of tackiness. The sheet is then passed between squeeze rolls 14 and at this point tissue drawn from the coil 13 is applied to the lower surface of the sheet while similar tissue is drawn from the overhead coil 17 and applied to the upper surface of the sheet. Finally the laminated material is wound in a coil 18.
The sheet material thus prepared may now be cut into blanks for use in stiffening box toes or counters. A box toe blank as shown in FIG. 3 wherein the base textile fabric 20 is shown has united to a coextensive ply 21 of tissue, the latter being shown as partially separated from the base fabric. The blank, thus prepared, may be shipped and handled as conveniently as a piece of lightlysized fabric. When ready for actual use it may be brushed or dipped in an ammonium solution and this is distributed over the entire surface of the blank and retained in and by the porous and absorbent tissue ply 21 in the most favorable position for causing rapid final polymerization of the urea compound and hardening of the blank in the shape which has been imparted to it by the enclosed last.
While we have referred to urea formaldehyde as a satisfactory and desirable stiffening compound, it could be within the scope of the invention to employ any other urea solution or compound having similar characteristics, such as thiourea-aldehyde, melamine-aldehyde or phenol-aldehyde.
Ammonium phosphate, phosphoric acid, hydrochloric acid or their equivalents may also be employed as the catalyst component if desired.
Suitable tissues for purposes of this invention are readily available in the open market and may be described as thin, light weight and translucent as well as porous and absorbent in texture, more absorbent than the base fabric. The tissue may be of paper stock, or cotton fabric or other cellulose sheet material of medium weight or lighter.
Where thin tissue is used it has a tendency to blend and merge with the base sheet so completely as to become substantially invisible and under such condition it is difficult for the user to determine which side of the blank should be located in contact with the shoe lining. To obviate this difficulty we employ a tissue differently colored from the underlying base sheet to indicate the urea-carrying surface of the blank.
As a further important embodiment of our invention We employ a base sheet impregnated with a thermoplastic stiffening compound. In this instance the sheet material drawn from the coil 10, instead of being untreated cotton, for example, may carry such thermoplastic component as cellulose acetate or nitrate, ethyl cellulose, methacrylate,
vinyl acetate, butyral or chloride or combinations of the same with natural gums or waxes. In using material of this kind the blank is activated by the application of the liquid catalyst, placed in the shoe upper and molded under heat and pressure while the urea component is converted by condensation to its hard insoluble stage. The action of the urea compound is to supplement the more brittle stiffening of the thermoplastic component and obviate the formation of cracks in the finished toe box or counter, providing a box toe in the shoe superior in respect to life and texture to those heretofore known.
Having thus disclosed our invention and described in detail illustrative embodiments thereof, we claim as new and desire to secure by Letters Patent:
References Cited in the file of this patent UNITED STATES PATENTS 2,277,941 Almy Mar. 31, 1942 2,446,414 Farrell et a1 Aug. 3, 1948 2,758,045 Heaton et a1 Aug. 7, 1956
US84066759 1959-09-17 1959-09-17 Urea coated stiffening sheet Expired - Lifetime US3068130A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294618A (en) * 1965-04-22 1966-12-27 John A Manning Paper Co Inc Paper product
US3408240A (en) * 1965-05-20 1968-10-29 Riegel Paper Corp Double laminating process using a single waxing station
US4012267A (en) * 1975-07-10 1977-03-15 Bell Telephone Laboratories, Incorporated Process for producing pultruded clad composites
US5211792A (en) * 1990-04-30 1993-05-18 Richard Carter Method of laminating multiple layers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277941A (en) * 1941-06-12 1942-03-31 Armstrong Cork Co Manufacture of shoes
US2446414A (en) * 1944-09-30 1948-08-03 Marathon Corp Method of applying heat-sealable labels
US2758045A (en) * 1952-09-08 1956-08-07 Beckwith Mfg Co Solvent softening shoe stiffener

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277941A (en) * 1941-06-12 1942-03-31 Armstrong Cork Co Manufacture of shoes
US2446414A (en) * 1944-09-30 1948-08-03 Marathon Corp Method of applying heat-sealable labels
US2758045A (en) * 1952-09-08 1956-08-07 Beckwith Mfg Co Solvent softening shoe stiffener

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294618A (en) * 1965-04-22 1966-12-27 John A Manning Paper Co Inc Paper product
US3408240A (en) * 1965-05-20 1968-10-29 Riegel Paper Corp Double laminating process using a single waxing station
US4012267A (en) * 1975-07-10 1977-03-15 Bell Telephone Laboratories, Incorporated Process for producing pultruded clad composites
US5211792A (en) * 1990-04-30 1993-05-18 Richard Carter Method of laminating multiple layers

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