US1961914A - Paper product - Google Patents

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Publication number
US1961914A
US1961914A US49733130A US1961914A US 1961914 A US1961914 A US 1961914A US 49733130 A US49733130 A US 49733130A US 1961914 A US1961914 A US 1961914A
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US
Grant status
Grant
Patent type
Prior art keywords
regenerated
cellulose
paper
plies
product
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
Application number
Inventor
George A Richter
Milton O Schur
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Brown Co
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Brown Co
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Publication date
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    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/21Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24Polysaccharides
    • D21H17/25Cellulose
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00Coated paper; Coating material
    • D21H19/10Coatings without pigments
    • D21H19/14Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/34Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30Multi-ply
    • D21H27/32Multi-ply with materials applied between the sheets
    • D21H27/34Continuous materials, e.g. filaments, sheets, nets
    • D21H27/36Films made from synthetic macromolecular compounds
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/65Acid compounds
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63Inorganic compounds
    • D21H17/66Salts, e.g. alums
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777Edge feature
    • Y10T428/24793Comprising discontinuous or differential impregnation or bond
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/24Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/24992Density or compression of components
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249961With gradual property change within a component
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249962Void-containing component has a continuous matrix of fibers only [e.g., porous paper, etc.]
    • Y10T428/249964Fibers of defined composition
    • Y10T428/249965Cellulosic
    • Y10T428/249966Plural cellulosic components

Description

' June 5, 1934. f

G. A. RICHTER ET AL 1,961,914

PAPER PRODUCT Filed Nov. 2l, 1930 Patented June 5, 1934 UNITED STATES PATENT oFFlcE PAPER PRODUCT Application November 21, 1930, Serial No. 497,331

11 Claims.

This invention relates to a paper product, and more particularly one which is associated with a strength-giving agent, such as regenerated cellulose, which does not detract appreciably from the absorbency of the product. While not restricted thereto, the paper product of the present invention is intended more especially for use as towelling or in other situations where a low-priced sheet material having the quality of absorbency, coupled with that of high wet strength, is desired.

When a strength-giving agent, such as regenerated cellulose, is introduced throughout a waterleaf paper such as intended for use as towelling, for instance in amount as low as 1%, it is found that the wet strength of such paper may be quadrupled, or even more greatly increased, Without detracting appreciably from its absorbency. In accordance with the present invention, a paper sheet is produced in which the strength-giving agent, and more especially regenerated cellulose, is non-uniformly distributed depthwise, that is, so that a cross-section through the paper is made up of layers varying in their contents of regenerated cellulose. On the accompanying drawing, Figures 1 to 5, inclusive, represent enlarged sections through paper products embodying different forms of our invention, with the appropriate legends thereon. For instance, the surface portions or outer layers of the paper sheet may advantageously contain more regenerated cellulose than its `inner portion or layer, which, in fact, may be entirely devoid of regenerated cellulose, as illustrated in Figure 1. The resulting sheet as a whole is strong, especially when wet, because of the tough outer layers; the outer surfaces are resistant toward linting upon abrasion; the inner layer is preserved soft, fluffy, and highly absorbent; and the sheet as a whole has a high capacity for absorbing Water. Such a sheet may be made as an integral or unitary structure, as by applying viscose to the surfaces of a waterleaf paper sheet in amount and concentration only sufficient to sink into the outer layers of the sheet, fixing regenerated cellulose, as a continuous phase in situ in such layers, as by immersing thev sheet in a solution of a suitable cellulose-regenerating agent, such as boric acid or alum, and finally drying the sheet. A comparable product may be made from three or more independent paper plies, two of these plies containing regenerated cellulose and being intended as the outer layers of the multi-ply product, and the remaining ply or plies lacking regenerated cellulose and being intended as the inner layer or layers of the product, as

illustrated in Figure 2. The plies may be bonded together as through interfelting or matting of the contacting surface portions while they are wet, or through the cementing action'of gelatinized cellulose, freshly-formed regenerated cellulose, or the like. When the greatest softness and flexibility are desired in the multi-ply product, as when it is to be used as towelling, the plies may be superposed Without bonding to one another. The tendency in such a multi-ply product for the plies to separate when the towelling is put to use and the difficulties of cutting, folding, assembling, and laying up into packages may be obviated and coherence of plies may be realized without material sacrifice of softness and flexibility in the multi-ply product, if the plies are cemented or otherwise united merely locally or at their edges.

In some cases, it is desirable to have the outer plies free from or poor in regenerated cellulose while having the inner ply or plies rich in this strength-giving agent, as illustrated in Figure 3. This is true if the outer plies are to be preserved particulary soft, as is desirable when the product is intended as bandage or diaper material. Should it be 'an important consideration to produce a product at lower cost, only two plies may be employed, one of which contains more regenerated cellulosethan the other, which may, in fact, be devoid of this element, as illustrated in Figure 4.

The principles of the present invention extend tomulti-ply products comprising one or more exceedingly thin plies made entirely of regenerated cellulose or Cellophane, for instance a multi-ply product comprising an inner ply of "Cellophane associated with outer plies of paper containing regenerated cellulose or free from regenerated cellulose, as illustrated in Figure 5. Thus, a product comprising an inner py of Cellophane adhesively united with outer plies of paper containing about 1% of regenerated cellulose, which paper piles are, as hereinbefore indicated, absorptive, may be of advantage for use as a bed-sheet, especially in hospitals, or as a bandage material, as both these uses call for a sheet material of high wet strength.

By the expression continuous phase of regenerated cellulose as used in the foregoing description and in the appended claims, we mean regenerated celulose existing as a continuous body, for instance, as a preformed film termed Cellophane, or as an lmpregnant extending substantially uninterruptedly in the surface portions, interior, or throughout paper. We do not' mean to include thereby an interrupted or localized either one or more directions, with regenerated cellulose. as this means that the impregnated areas will respond differently to wetting action than the unimpregnated areas and that the impregnant will impart to the paper a non-uniform feel, especially in the presence o! water.

What we claim is:

l. A porous paper product possessed of a uniform `feel and containing more regenerated cellulose es a continuous phase in the pores o! its sur- !aoe portions than in the pores o! its inner portion.

2. A porous paper product possessed of a unitonn feel and containingregenerated cellulose n a continuous phase in the -pores of its surface portions but devoid oi' regenerated cellulose in the pores o! its inner portion.

3. A porous paper product possesed of a uniform reel and containing more regenerated cel.u loee es a continuous phase in' its inner portion than in the pores of its surface portions.

4. A porous multi-ply paper possessed oi' a uniform feel and whose plies contain in their pores at ledit tvo diierent concentrations o! continuous phases o! regenerated cellulose.

5. A multi-ply papel: possessed of a uniform feel and made up of at leest three paper plies, the outer plies containing in their pores regenerated cellulose as continuous phases but the rest of the plies being substantially devoid of regenerated cellulose.`

o. A multi-ply paper of a uniform yimpregnation of paper, as along spaced lines in feel and made up of at least three paper plies bonded together, the outer plies containing in their pores regenerated cellulose as continuous phases but the rest of the plies being substantialy free from regenerated cellulose.

7. A multi-ply paper possessed of a uniform feel and made up of at least three paper plies, the outer plies containing in their pores regenerated cellulose as continuous phases but the rest of the plies being substantially free from regenerated cellulose, said plies being locally bonded together.

8. A multi-ply paper made up of at least three paper plies. the outer plies containing in their pores regenerated cellulose as continuous phases but the rest of the plies being substantially free from regenerated cellulose and being bonded together at their edges only.

9.`A multi-,ply product comprising an inner,

` continuous ply of `regenerated cellulose adhesively united to outer absorptive plies of paper containing in their pores regenerated cellulose.

l0. A multi-ply product comprising an inner. preformed ply of regenerated cellulose adhesively united to outer absorptive plies ot paper containing in their pores regenerated cellulose.

`1 1. A multi-ply product comprising an inner, preformedpy of regenerated cellulose united to outer absorptive plies of paper containing in their pores about 1 of regenerated cellulose.

GEORGE A. RICHTER. MILTON O. SCHUR.

US1961914A 1930-11-21 1930-11-21 Paper product Expired - Lifetime US1961914A (en)

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US1961914A US1961914A (en) 1930-11-21 1930-11-21 Paper product

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647816A (en) * 1948-07-10 1953-08-04 American Viscose Corp Method of making a wound package and after-treating the same
US2744292A (en) * 1953-02-10 1956-05-08 Rayonier Inc Regenerated cellulose sheets and process of producing the sheets
US2789935A (en) * 1954-10-07 1957-04-23 Ohio Commw Eng Co Method of producing paper made with nylon scrap and apparatus
US2966439A (en) * 1956-08-28 1960-12-27 Arvey Corp Lamination of shrinkable films
US3104682A (en) * 1959-07-13 1963-09-24 Union Carbide Corp Fibrous web reinforced cellulosic casings
US3366532A (en) * 1964-11-25 1968-01-30 Buckeye Cellulose Corp Pliable, absorbent, bonded paper laminates
US3392073A (en) * 1959-07-13 1968-07-09 Union Carbide Corp Method for making fibrous web reinforced cellulosic casing
US4178407A (en) * 1970-03-02 1979-12-11 Rubens Harry E Absorbent fibrous towel
US4377615A (en) * 1980-09-20 1983-03-22 Uni-Charm Corporation Nonwoven fabrics and method of producing the same
US5480699A (en) * 1986-09-08 1996-01-02 Flawa Schweizer Verbandstoff-Und Wattefabrieken Ag. Flawil Pad for applying liquid or semi-solid material
US20100221562A1 (en) * 2009-02-27 2010-09-02 Veronica Hawkins-Garcia Multi-layered food wrapping material

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647816A (en) * 1948-07-10 1953-08-04 American Viscose Corp Method of making a wound package and after-treating the same
US2744292A (en) * 1953-02-10 1956-05-08 Rayonier Inc Regenerated cellulose sheets and process of producing the sheets
US2789935A (en) * 1954-10-07 1957-04-23 Ohio Commw Eng Co Method of producing paper made with nylon scrap and apparatus
US2966439A (en) * 1956-08-28 1960-12-27 Arvey Corp Lamination of shrinkable films
US3104682A (en) * 1959-07-13 1963-09-24 Union Carbide Corp Fibrous web reinforced cellulosic casings
US3392073A (en) * 1959-07-13 1968-07-09 Union Carbide Corp Method for making fibrous web reinforced cellulosic casing
US3366532A (en) * 1964-11-25 1968-01-30 Buckeye Cellulose Corp Pliable, absorbent, bonded paper laminates
US4178407A (en) * 1970-03-02 1979-12-11 Rubens Harry E Absorbent fibrous towel
US4377615A (en) * 1980-09-20 1983-03-22 Uni-Charm Corporation Nonwoven fabrics and method of producing the same
US5480699A (en) * 1986-09-08 1996-01-02 Flawa Schweizer Verbandstoff-Und Wattefabrieken Ag. Flawil Pad for applying liquid or semi-solid material
US20100221562A1 (en) * 2009-02-27 2010-09-02 Veronica Hawkins-Garcia Multi-layered food wrapping material

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