Single ply webs with increased softness having two outer layers and a middle layer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-027/30
D21H-027/38
B31F-001/00
B32B-029/00
출원번호
US-0354866
(2003-01-30)
발명자
/ 주소
Bakken, Andrew P.
Runge, Troy M.
Zwick, Kenneth J.
출원인 / 주소
Kimberly-Clark Worldwide, Inc.
대리인 / 주소
Dority &
인용정보
피인용 횟수 :
2인용 특허 :
56
초록▼
“Products made from a process for increasing the tactile properties of a base web without adversely affecting the strength of the web is disclosed. In general, the process includes the steps of placing a base web in between a first moving conveyor and a second moving conveyor. The conveyors are then
“Products made from a process for increasing the tactile properties of a base web without adversely affecting the strength of the web is disclosed. In general, the process includes the steps of placing a base web in between a first moving conveyor and a second moving conveyor. The conveyors are then wrapped around a shear inducing roll which creates shear forces that act upon the base web. The shear forces disrupt the web increasing the softness and decreasing the stiffness of the web. The shear inducing roll typically has a relatively small diameter. In some applications, more than one shear inducing roll may be incorporated into the system.”
대표청구항▼
1. A single-ply paper web comprising:a stratified base web containing a middle layer positioned in between a first outer layer and a second outer layer, said first and second outer layers having a greater shear strength than said middle layer, said middle layer containing stiffened cellulose fibers,
1. A single-ply paper web comprising:a stratified base web containing a middle layer positioned in between a first outer layer and a second outer layer, said first and second outer layers having a greater shear strength than said middle layer, said middle layer containing stiffened cellulose fibers, wherein said stratified base web has been subjected to external shear forces in an amount sufficient to weaken said middle layer, said in-plane shear forces having been exerted on the exterior surfaces of the base web. 2. A paper product as defined in claim 1, wherein said stiffened cellulose fibers comprise mercerized fibers.3. A paper product as defined in claim 1, wherein said stiffened cellulose fibers are chemically crosslinked.4. A paper product as defined in claim 1, wherein said paper product comprises a paper towel.5. A paper product as defined in claim 1, wherein said paper product comprises a bath tissue.6. A paper product as defined in claim 1, wherein said first outer layer and said second outer layer contain softwood fibers.7. A paper product as defined in claim 1, wherein said base web has a basis weight of from about 5 pounds per ream to about 90 pounds per ream.8. A paper product as defined in claim 1, wherein said stratified base web has been guided around a shear inducing roll while positioned between a first moving conveyor and a second moving conveyor in order to produce said external shear forces.9. A single-ply paper web comprising:a stratified base web containing a middle layer positioned in between a first outer layer and a second outer layer, the first and second outer layers having a greater shear strength than the middle layer, the middle layer containing stiffened cellulose fibers, and wherein the base web has been subjected to in-plane shear forces applied to the outer layers of the base web, the in-plane shear forces being applied to an exterior surface of each outer layer of the base web in an amount sufficient to weaken the middle layer and increase the softness of the web. 10. A single-ply paper web as defined in claim 9, wherein the stiffened cellulose fibers comprise mercerized fibers.11. A single-ply paper web as defined in claim 9, wherein the stiffened cellulose fibers comprise chemically crosslinked fibers.12. A single-ply paper web as defined in claim 9, wherein the first outer layer and the second outer layer contain softwood fibers.13. A single-ply paper web as defined in claim 12, wherein the stiffened cellulose fibers comprise mercerized fibers.14. A single-ply paper web as defined in claim 12, wherein the stiffened cellulose fibers comprise chemically crosslinked fibers.15. A single-ply paper web as defined in claim 9, wherein the paper web comprises a paper towel having a basis weight of from about 5 lbs. per ream to about 25 lbs. per ream.16. A single-ply paper web as defined in claim 9, wherein the paper web comprises a bath tissue having a basis weight of from about 5 lbs. per ream to about 15 lbs. per ream.17. A single-ply paper web as defined in claim 9, wherein the base web has been guided around a shear inducing roll while positioned between a first moving conveyor and a second moving conveyor in order to produce the in-plane shear forces.18. A single-ply paper web comprising:a stratified base web containing a middle layer positioned in between a first outer layer and a second outer layer, the first outer layer and the second outer layer comprising softwood fibers, the first and second outer layers having a greater shear strength than the middle layer, the middle layer containing fibers selected from the group consisting of mercerized fibers and chemically crosslinked cellulose fibers, and wherein the base web has been subjected to external, in-plane shear forces in an amount sufficient to weaken the middle layer and increase the softness of the base web, the in-plane shear forces having been exerted on the exterior surfaces of the base web. 19. A single-ply paper web as defined in claims 18, wherein the stratified base web has been guided around a shear inducing roll while positioned between a first moving conveyor and a second moving conveyor in order to produce the external, in-plane shear forces.20. A single-ply paper web as defined in claim 18, wherein the middle layer comprises mercerized fibers.
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