Method for making a multiply absorbent paper sheet and resulting product
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B31F-001/20
D21H-011/00
출원번호
US-0381449
(2001-09-27)
우선권정보
EP-00402673(2000-09-27)
국제출원번호
PCT/FR01/003000
(2001-09-27)
§371/§102 date
20030909
(20030909)
국제공개번호
WO02/026481
(2002-04-04)
발명자
/ 주소
Basler,Michel
Laurent,Pierre
Roussel,Gilles
Ruppel,Rė
my
출원인 / 주소
Georgia Pacific France
대리인 / 주소
Quarles &
인용정보
피인용 횟수 :
7인용 특허 :
1
초록▼
The invention concerns a method for making a sheet of paper comprising at least two crimped cotton-wool-like cellulose plies (20, 40). It consists in: unwinding a first ply (20) in the form of a strip from a reel, embossing it on an embossing unit (10, 12) and forming protuberances at its surface, u
The invention concerns a method for making a sheet of paper comprising at least two crimped cotton-wool-like cellulose plies (20, 40). It consists in: unwinding a first ply (20) in the form of a strip from a reel, embossing it on an embossing unit (10, 12) and forming protuberances at its surface, unwinding a second ply ( 40) in the form of a strip from a reel, guiding it downstream of the embossing unit (10, 12), superposing the two strips, with their protuberances facing inwards, and in applying a linking means (14, 16) so as to make the two strips integral with each other. Said method is characterised in that immediately upstream of said linking means (14, 16), a tension regulating means (18) is applied in the machine direction on one of the strips, such that the two strips have the same elastic deformation in the machine direction when the linking means is applied. The invention also concerns a product obtained by said method.
대표청구항▼
The invention claimed is: 1. A method for manufacture of a paper sheet comprising at least two plies of creped cellulose wadding, involving unwinding a first ply in a form of a strip from an unwinder, embossing it on an embossing group in order to form protuberances on its surface, unwinding a seco
The invention claimed is: 1. A method for manufacture of a paper sheet comprising at least two plies of creped cellulose wadding, involving unwinding a first ply in a form of a strip from an unwinder, embossing it on an embossing group in order to form protuberances on its surface, unwinding a second ply in the form of a strip from an unwinder, guiding it downstream of the embossing group as an unembossed second ply, superposing the two strips, with protuberances toward an inside between the two strips, and applying a connecting means so as to make the two plies integral with one another, wherein immediately upstream of said connecting means, a tension-regulating means is applied to one of the two strips in the running direction, so that the two strips have a same elastic deformation in a running direction when the connecting means is applied; and wherein the tension-regulating means is applied to the unembossed second ply and accelerates said second ply in the running direction, so that the two strips have the same elastic deformation in the running direction when the connecting means is applied. 2. The method as claimed in claim 1, wherein said regulating means is at a distance lower than three meters and preferably at two meters from the connecting means. 3. The method as claimed in claim 1, wherein regulating means consists of a pair of rollers, between which one of the strips of cellulose wadding is passed, the rollers being driven so as to modify the tension of said strip in a longitudinal direction. 4. The method as claimed in claim 1, wherein the connecting means consist of a knurling group. 5. The method as claimed in claim 1, wherein the connecting means consists of a mating cylinder cooperating with a steel cylinder of said embossing group in order to make a connection between the strips at tops of the protuberances formed. 6. The method as claimed in claim 1, wherein an adhesive is applied to the tops of said protuberances before the connecting means is applied. 7. The method as claimed in claim 4, wherein the protuberances in an embossing pattern of the first strip are spaced from one another, uninvolved zones between the protuberances occupying an area greater than 2 cm2. 8. The method as claimed in claim 7, the strips of cellulose wadding having a gsm count of between 10 and 40 g/cm2 and having between 40 and 80 creping lines per cm2, wherein the second strip is accelerated, immediately upstream of the connecting means, by the tension-regulating means to a speed higher by 0.5 to 3% than that of the two strips during their passage through the connecting means. 9. The method of claim 1, wherein the first ply is an embossed ply of creped cellulose wadding of 10 to 40 g/m2, comprising relief patterns consisting at least partially of discrete protuberances oriented toward the inside of the two plies, and wherein the second ply is the unembossed ply, and wherein the embossed ply has, over at least a portion of its surface, at least 30 protuberances per cm2, of which an area at a top is lower than 1 mm2, preferably lower than 0.7 mm2, the two plies having different gsm counts and/or different fibrous compositions. 10. The method as claimed in claim 9, wherein the gsm counts of the two plies differ by at least 5%, preferably by 5 to 30%. 11. The method as claimed in claim 10, wherein the gsm count of the embossed ply is between 15 and 20 g/m2 and that of the unembossed ply is between 21 and 25 g/m2. 12. The method as claimed in claim 10, wherein the gsm count of the embossed ply is between 21 and 25 g/m2 and that of the unembossed ply is between 15 and 20 g/m2. 13. The method as claimed in claim 9, wherein fibrous compositions of the two plies differ in such a way that one of the plies has a tearing strength higher than the other. 14. The method as claimed in claim 13, wherein the embossed ply has at least 30 protuberances per cm2 over at least 30% and preferably at least 50% of the total area. 15. The method as claimed in claim 9, wherein a number of protuberances is at least 50 per cm2, and their area at a top is lower than or equal to 0.4 mm2. 16. The method as claimed in claim 9, wherein a second pattern of embossing protuberances is provided between surface portions of said two plies. 17. The method as claimed in claim 16, wherein the two plies are combined by means of a connection of distal surfaces of at least some of the protuberances of the embossed first ply to said unembossed second ply. 18. The method as claimed in claim 17, wherein the connection is obtained by an adhesive bonding of the protuberances of the second pattern at least partially.
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이 특허에 인용된 특허 (1)
Roussel, Gilles; Laurent, Pierre; Ruppel, Remy, Absorbent paper product comprising two plies.
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