EP0373974A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of preparation of a highly absorbent nonwoven fabric
Assignee: Fitesa Simpsonville Inc
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Filing: 1989-06-22
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Granted: —
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Expires: 2009-06-22
Abstract
Abstract A strong, highly absorbent hard finished nonwoven toweling fabric consisting of wood pulp and textile fibers essentially free from added binders is prepared by forming a wet-laid web of a blend of fibers containing 30 to 80 weight percent wood pulp and 20 to 70 weight percent staple length fibers subjecting the fibers in the wet-laid web to hydroentanglement, and embossing the hydroentangled web. The embossed fabric may be apertured or essentially nonpertured, and may be made lint resistant or water repellant or both. The fabric may be converted into pads or towels having medical and surgical applications, or into household cloths, food service wipes, industrial machinery wipes or the like.
Inventors
- 👤 James Manning
- 👤 Stuart Suskind
- 👤 Kambiz Makoui
- 👤 Joseph Israel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
CPC Classifications
D; D21; D21H; D21H15/00; D21H15/02; D21H15/06; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/492; D21H25/00; D21H25/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A method of making a highly absorbent nonwoven fabric consisting essentially of wood pulp and staple length synthetic fibers which comprises forming a wet-laid web containing from about 30 to about 80 weight percent wood pulp and 70 to 20 weight percent staple length synthetic fibers basis the dry weight of the fibers, forming a compacted highly absorbent web of entangled fibers by subjecting the fibers in the wet-laid web to hydroentanglement, and drying said web to form said nonwoven fabric and embossing the hydroentangled web with a matched die pattern at ambient temperature.
Claim 2
Independent Claim
94 words
A method of making a highly absorbent nonwoven fabric consisting essentially of wood pulp and staple length synthetic fibers which comprises forming a wet-laid web containing from about 30 to about 80 weight percent wood pulp and 70 to 20 weight percent staple length synthetic fibers basis the dry weight of the fibers, forming a compacted highly absorbent web of entangled fibers by subjecting the fibers in the wet-laid web to hydroentanglement, and drying said web to form said nonwoven fabric and embossing the hydroentangled web with a matched die pattern at ambient temperature.
Claim 3
Dependent Claim
33 words
A method as defined in Claim 1 wherein the wet-laid web contains 55 to 65 weight percent wood pulp and 35 to 45 weight percent staple synthetic fibers, on a dry weight basis.
Claim 4
Dependent Claim
33 words
A method as defined in Claim 1 wherein the length of said staple synthetic fibers is in the range of from about one-half inch (12 mm) to about seven eighths inch (22 mm).
Claim 5
Dependent Claim
26 words
A method as defined in Claim 1 wherein the diameter of the synthetic fiber is in the range of from about .5 to about 3 denier.
Claim 6
Dependent Claim
57 words
A method as defined in Claim 1 wherein the wet-laid web is subjected to the entanglement action of water jets ejected from 0.005 inch (0.127 mm) diameter orifices equivalent to at least two passes at a head pressure 200 psig (1380 KPa), four passes at 600 psig (4140 KPa) and eight passes at 800 psig (5520 KPa).
Claim 7
Dependent Claim
32 words
A method as defined in Claim 5 wherein the weight of the nonwoven fabric is in the range of from about three to four ounces per square yard (102 to 135 g/m²).
Claim 8
Independent Claim
94 words
A method of making a highly absorbent nonwoven fabric consisting essentially of wood pulp and staple synthetic textile fibers free from added binders which comprises laminating a plurality of wet-laid webs each containing 50 to 75 weight percent wood pulp and 25 to 50 weight percent staple synthetic fibers, combining said webs into a single compacted highly absorbent web of entangled wood pulp fibers and synthetic fibers by subjecting the laminated webs to hydroentanglement, drying and embossing the hydroentangled webs with a matched die pattern at ambient temperature to form a highly absorbent fabric.
Claim 9
Independent Claim
94 words
A method of making a highly absorbent nonwoven fabric consisting essentially of wood pulp and staple synthetic textile fibers free from added binders which comprises laminating a plurality of wet-laid webs each containing 50 to 75 weight percent wood pulp and 25 to 50 weight percent staple synthetic fibers, combining said webs into a single compacted highly absorbent web of entangled wood pulp fibers and synthetic fibers by subjecting the laminated webs to hydroentanglement, drying and embossing the hydroentangled webs with a matched die pattern at ambient temperature to form a highly absorbent fabric.
Claim 10
Dependent Claim
33 words
A method of making a nonwoven fabric according to Claim 7 wherein the dry weight ratio of wood pulp to synthetic fibers is in the range of from about 1 to about 3.
Claim 11
Dependent Claim
21 words
A method of making nonwoven fabric according to Claim 7 wherein the synthetic fiber is a polypropylene, nylon or polyester fiber.
Claim 12
Dependent Claim
39 words
A method of making a nonwoven fabric as defined in Claim 7 wherein the dry hydroentangled fabric has a basis weight in the range of from about 3 to about 10 ounces per square yard (102 to 339 g/m²).
Claim 13
Dependent Claim
43 words
A method of making a nonwoven fabric as defined in claim 7 wherein the wet laid webs are dried prior to lamination and have a basis weight in the range of 1 to 4 ounces per square yard (33,9 g/m² to 135 g/m²).
References Cited (Backward Citations)
No citation records indexed.
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