Laminate of tissue and random laid continuous filament web

• US 3,900,632 A
• Filed: 04/03/1972
• Issued: 08/19/1975
• Est. Priority Date: 02/27/1970
• Status: Expired due to Term

• Current Assignee: James E. Robinson
• Original Assignee: James E. Robinson
• Inventors: Robinson, James E.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Cannon, J.
• Application Number:
  US05/240,754
• Time in Patent Office: 1,233 Days
• Field of Search: 161/128,129,146,148,150
• US Class Current: 428/196
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres vinyl or acrylic copolymers B32B2262/0223 or B32B2262/0246
• CPC Class Codes: B32B 29/02 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 7/14 applied in spaced arrangements, e.g. in stripes
• CPC Class Codes: D04H 5/04 strengthened or consolidated by applying or incorporating chemical or thermo-activatable bonding agents in solid or liquid form
• CPC Class Codes: Y10T 428/2481 including layer of mechanically interengaged strands, strand-portions or strand-like strips
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 442/668 Separate nonwoven fabric layers comprise chemically different strand or fiber material

Abstract

Laminates comprising cellulose wadding and a web of continuous thermoplastic filaments are disclosed. The laminates have a good hand, are strong, attractive in appearance, and absorb and retain fluid.

Claims

1. A NONWOVEN FABRIC-LIKE LAMINATE COMPRISING IN COMBINATION, A. A LOW BASIS WEIGHT, SINGLE PLY NONWOVEN WEB OF SUBSTANTIALLY CONTINUOUS AND RANDOMLY DEPOSITED, MOLECULARLY ORIENTED FILAMENTS OF A HYDROPHOBIC THERMOPLATIC POLYMER, SAID WEB PREPARED BY CONTINUOUS POLYMER EXTRUSION THROUGH A SPINNERET AND FILAMENT DEPOSITION ON A SUPPORTING SURFACE AND HAVING A BASIS WEIGHT OF UP TO ABOUT 0.7 OZ./YD.2 WITH THE FILAMENTS THEREOF HAVING A DENIER OF ABOUT 6, B. A WEB OF CELLULOSE WADDING HAVING A BASIS WEIGHT OF ABOUT 0.3-ABOUT 0.7 OZ./YD.2 DISPOSED IN LAMINAR RELATIONSHIP WITH RESPECT TO THE SINGLE PLY WEB (A), AND C. PATTERNED AREAS OF ADHESIVE DISPOSED BETWEEN SAID WEBS WHICH PENETRATE INTO SAID CELLULOSE WADDING WEB AT SPACED OPEN AREAS IN A MANNER SO AS TO PROVIDE DELAMINATION RESISTANCE IN COMBINATION WITH FABRIC-LIKE FLEXIBILITY, SAID NONWOVEN WEB AND CELLULOSE WADDING WEB COMBINING TO PROVIDE A MATERIAL WITH DESIRABLE ISOTROPIC STRENGTH CHARACTERISTICS, FABRIC-LIKE OPAQUENESS, ABSORBENCY, AND A NATURAL FABRIC FEEL.

2. The nonwoven fabric-like laminate of claim 1 wherein the nonwoven web has a basis weight of about 0.3-about 0.7 oz./yd.2, the thermoplastic polymer is polypropylene, and the filaments have a denier of about 0.8-about 2.5.

3. The nonwoven fabric-like laminate of claim 1 comprising outer plies of cellulose wadding and, as an inner ply, the single ply nonwoven web.

4. The nonwoven fabric-like laminate of claim 3 wherein the continuous filament web is bonded by the application of heat and pressure at intermittent areas occupying about 5-50% of the web area and in a density of about 50-3200 per square inch.

5. The nonwoven fabric-like laminate of claim 4 wherein the thermoplastic polymer is polypropylene.

6. The nonwoven fabric-like laminate of claim 3 wherein the nonwoven web has a basis weight of about 0.3-about 0.7 oz./yd.2, the thermoplastic polymer is polypropylene, and the filaments have a denier of about 0.8-about 2.5.

7. A nonwoven fabric-like laminate comprising, in combination, a. a low basis weight, single ply nonwoven web of subsTantially continuous and randomly deposited, molecularly oriented filaments of a hydrophobic thermoplastic polymer selected from polyolefins, polyurethanes, polyvinyls, polyamides and polyesters, said web prepared by continuous polymer extrusion through a spinneret and filament deposition on a supporting surface and having a basis weight of up to 0.7 oz./yd.2 with the filaments thereof having a denier of about 0.5-about 6, b. a web of cellulose wadding having a basis weight of about 0.3-about 0.7 oz./yd.2 disposed in laminar relationship with respect to the single ply web (a), and c. patterned areas of a plastisol adhesive disposed between said webs which penetrate into said cellulose wadding web at spaced open areas occupying less than about 25% surface area in a manner so as to provide delamination resistance in combination with fabric-like flexibility, said nonwoven web and cellulose wadding web combining to provide a material with desirable isotropic strength characteristics, fabric-like opaqueness, absorbency, and a natural fabric feel.

8. The nonwoven fabric-like laminate of claim 7 wherein the continuous filament web is bonded by the application of heat and pressure at intermittent areas occupying about 5-50% of the web area and in a density of about 50-3200 per square inch.

9. The nonwoven fabric-like laminate of claim 8 wherein the nonwoven web has a basis weight of about 0.3-about 0.7 oz./yd.2, thermoplastic polymer is polypropylene, and the filaments have a denier of about 0.8-about 2.5.

10. The nonwoven fabric-like laminate of claim 8 comprising outer plies of cellulose wadding and, as an inner ply, the single ply nonwoven web.

11. The nonwoven fabric-like laminate of claim 10 wherein the spaced open areas of plastisol adhesive occupy less than about 15% surface area.