Minnesota Mining and Manufacturing Company

Shell Oil Comapny

John A Miller

Leigh E Wood

Alan J Sipinen

Susan K Nestegard

George J Clements

Ruben E Velasquez Urey

Earl Tate, Jr

Egbert A Von Jakusch

William L Melbye

Steven S Chin

Ramsis Gobran

Stephen W Bany

Roland R Midgley

Yoshihiro Akiyama

Donald L Plaschko

Robert S Mulder

Yasuhiro Kono

Anthony J Zoia

Brad W Eaton

A pressure-sensitive adhesive and tape are provided having a rubber component (30-60 weight percent) of polyisoprene (4-55 weight percent) blended with a styrene-isoprene-styrene block copolymer (96-45 weight percent) and a tackifying component (70-40 weight percent) to provide an adhesive that exhibits superior adhesion performance to low surface energy substrates.

Pressure-sensitive adhesive and disposable diaper closure system

An adhesive of certain elastomeric block copolymers and tackifying materials can be hot-melt coated onto a flexible backing to provide an adhesive tape, two pieces of which can bond to each other to have excellent resistance to shear forces but can be easily peeled apart, even after prolonged periods of time. The adhesive can be low-tack or tack-free. When the novel adhesive is tacky, it can bind sheets into a note pad from which individual sheets can be removed, temporarily adhered to paper and other substrates, and later cleanly removed, even after prolonged contact.

Repositionable adhesive tape

A linear styrene-isoprene-styrene block copolymer composition comprised of linear polymeric blocks wherein the block copolymer composition has a coupling efficiency of 25 to 82 percent, a polystyrene content of from 19 to 27 percent by weight, a polystyrene block molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of 12,000 to 18,000, and an overall molecular weight (peak polystyrene equivalent molecular weight as determined by gel permeation chromatography) of from 170,000 to 280,000. The invention also contemplates adhesive formulations comprising these block copolymer compositions and a tackifying resin.

Styrene-isoprene-styrene block copolymer composition and adhesives made

A tape closure system exhibiting high shear and high non-shocky peel to a low adhesion backsize coated substrate is disclosed. The adhesive used on the fastening tape used in the closure system comprises a high diblock (.gtoreq.25 percent) styrene-isoprene-styrene elastomer component with a composite midblock glass transition temperature of 244 to 264 Kelvin with 30 to 60 percent elastomer.

Frontal tape-based diaper closure system

Pressure-sensitive adhesive compositions and an improved refastenable tape closure system comprising a release tape and a fastening tape wherein the fastening tape has a balance of properties such that the tape exhibits a maximum in the peel force between peel rates of 10 cm./minute and 400 cm./minute when peeled from a polyolefin substrate as found in disposable diaper back sheets are disclosed. The adhesive of the fastening tape comprises a specific range of compositions including an elastomeric component based on an A-B-A block copolymer wherein the A blocks are derived from styrene or alphamethylstyrene and the B block are derived from isoprene, butadiene, or hydrogenated versions of these or an (AB) block copolymer of the same type of composition in another geometry such as a tapered block copolymer or a radial block copolymer, a solid tackifier resin, a liquid tackifier resin, and an end block reinforcing resin.

Pressure-sensitive adhesive composition, tape and diaper closure system

A disposable garment or diaper including a laminate and a hook and loop fastener for fastening together portions of the laminate to secure the diaper to an individual. The fastener includes a loop fastener portion adjacent a first end of the laminate comprising a multiplicity of loops, a pair of flexible elongate polymeric tab assemblies having first end portions attached at opposite sides to the laminate adjacent a second end of the laminate and having distal end portions unattached to the laminate, and hook fastener portions at the distal end portions of the tab assemblies comprising a plurality of projecting hook members adapted to make releasable engagement with the loops. The tab assemblies include a layer of pressure sensitive adhesive on the distal end portions adjacent the hook fastener portion which can, after the diaper has been soiled and removed from the individual, be used for securing the soiled diaper in a rolled or folded condition surrounding the soiled portion of the diaper to facilitate its disposal by engagement of the layer of pressure sensitive adhesive with the laminate.

Disposable diaper with improved hook and loop fastener system

Pressure-sensitive adhesive compositions and an improved refastenable tape closure system comprising a release tape and a fastening tape wherein the fastening tape has a balance of properties such that the tape exhibits a maximum in the peel force between peel rates of 10 cm./minute and 400 cm./minute when peeled from a polyolefin substrate as found in disposable diaper back sheets are disclosed. The adhesive of the fastening tape comprises a specific range of compositions including an elastomeric component based on an A-B-A block copolymer wherein the A blocks are derived from styrene or alphamethylstyrene and the B blocks are derived from isoprene, butadiene, or hydrogenated versions of these or an (AB) block copolymer of the same type of composition in another geometry such as a tapered block copolymer or a radial block copolymer, a solid tackifier resin, a liquid tackifier resin, and an end block reinforcing resin.

A diaper, adhesive fastening tab which exhibits good peel, quick-stick, shear strength and aging when used with a diaper outer film, either with or without a low adhesion backside. The adhesive used with the fastening tab is based on a composition comprising a slightly aromatic containing aliphatic oil, a styrene/isoprene block copolymer and a solid C.sub.5 tackifying resin.

Adhesive fastening tab

A disposable garment or diaper having a fastener including fastener portions adapted for releasably mechanically engaging each other; and a bonding layer of room-temperature non-tacky thermoplastic material adhering one of the fastener portions to a thin polyolefin layer of the garment and being bonded to that polyolefin layer under heat and pressure that leaves the polyolefin layer substantially undeformed. The bonding layer holds the fastener portion to the polyolefin film with greater force than that which is required to separate the engaged fastener so that the fastener may be repetitively closed and opened.

Disposable diaper with improved fastener attachment

A disposable diaper is provided which includes an outer liquid-impermeable film and a bilayer film bonded to the liquid-impermeable film as a peel-resistant reinforced fastening area. The bilayer film comprises a reinforcing layer and a room-temperature-nontacky bonding layer. The bonding layer holding the reinforcing layer to the liquid-impermeable film with greater force than that which the fastening tape applies when adhered to the top of bilayer film.

Growing community of inventors

Woodbury, MN, United States of America

John A Miller