TW200300810A - Tissue products having reduced lint and slough - Google Patents

Abstract

A method for forming a tissue product that is soft and produces relatively low levels of lint and slough is provided. The method includes providing a liquid furnish of cellulosic fibers and forming a multi-layered wet web therefrom. At least one latex having a glass transition temperature less than about 30 DEG C is applied to the furnish , wet web, or combinations thereof in an amount less than about 60 pounds per ton of the dry weight of the cellulosic fibers. The web is then dried such that at least one outer layer of the dried web contains the latex-treated cellulosic fibers.

Description

200300810 发明 Description of the invention (Description of the technical field, prior art, description, implementation, and drawings of the logo), [Technical field to which the invention belongs] Tissue products, such as facial tissue, paper towels, and toilet paper , Sanitary napkins and other similar products will be designed to have several important properties at the same time. For example, this type of product should have good bulk, be soft to the touch, and have good strength. 'However, unfortunately, when a means to increase a product's properties is implemented,' other characteristics of the product often have an adverse effect. [Prior Art] For example, during the papermaking process, various resins are generally used to increase the wet strength of a fabric. For example, cationic resins are often used because they are easier to form bonds with anionic valence cellulose fibers. In addition, resins that are negative in nature are also used. For example, U.S. Patent No. 3,844,880, issued by Meisei, et al., Describes that anionic styrene-butadiene latex is bound to anionic cellulose fibers by retention. Although strength resins can increase the strength of fabrics, they can also easily change fabrics. As a result, multiple methods are often used to offset this type of hardness and soften the product. For example, chemical debonding agents can be used to reduce fiber bonding and thereby increase softness. Nevertheless, reducing the bonding of fibers to chemical debonding agents sometimes adversely affects the strength of tissue products. For example, hydrogen bonds between adjacent fibers can be disrupted by such chemical debonding agents and mechanical forces in papermaking processes. Therefore, this type of debonding agent will produce loosely bonded fibers, allowing the fibers to extend from the surface of the tissue product. During manufacturing and / or use, these loosely bonded fibers 讦 are removed from tissue paper products, thereby producing lint, which is defined as individual airspace

0 Continuation page ΡΚΟΟ 1 -08 1 8-B (When the invention description page is insufficient, cky- 20030220 -February 20, 2003 Please note and use the continuation page) 7 200300810 Invention description $ Selling stomach Dispersed fibers and fiber fragments. Furthermore, the papermaking process can also produce fibers that are weakly connected to each other but not connected between adjacent areas. As a result, during use, specific shearing forces can release weakly connected areas from other fibers, thereby creating shedding, that is, fiber bundles or pellets on the surface (such as the skin or fabric). As such, the use of such debonding agents often results in weaker ' s products ' when used, and larger amounts of cotton and delloid. Therefore, there is currently a need for a strong, soft tissue product with only a small amount of lint and shedding. [Content] According to one embodiment of the present invention, a method for forming a tissue paper product is provided. The method includes providing a liquid raw material of cellulose fibers and forming a multilayer wet fabric from the liquid raw material of cellulose fibers. At least one latex (non-ionic or anionic) is added to the raw materials, wet fabrics (such as by spraying), or their composition t 'added at an amount of 60 pounds per ton of cellulose fiber dry weight, in some implementations In the example, the dry weight is between 1 and 40 pounds per ton of cellulose fiber, and in some embodiments the amount is between i and 20 pounds per ton of cellulose fiber dry weight. This latex has a glass transition temperature of less than 30 and in some embodiments greater than -25 ° C. For example, in some embodiments, the glass transition temperature is between -15. 0 to 15 ° c, and in some embodiments between −10 ° to 0 °. The latex may be selected from a styrene-butadiene copolymer, a polyvinyl acetate homophase polymer, a vinyl-vinyl acetate copolymer, a 'vinyl-acetate acrylic copolymer, an ethylene-acetamidine gaseous copolymer, Acetyl-vinyl, gaseous-ethylene, acetate terpolymers, acrylic polyvinyl chloride polymers, acrylic polymers, and nitrous acid copolymers. [2 Continued pages (if the invention description page is insufficient, please note and use the continued alfalfa) PK〇〇i.〇8l8-Becky-20030220 -February 20, 2003 〆, 200300810 Can force σ to raw materials, wet fabrics or combinations thereof. The debonding agent is added in a fine amount of >, ~ 1 ', to 1 to 30 pounds of the mother ton of cellulose fiber. In some embodiments, the sterilizer VII,,, and w may include a quaternary quaternary compound and / or a vinegar functional quaternary ammonium compound. You can also add active, strong strength agents to raw materials, wet fabrics, or combinations thereof. When you use it, the total amount of temporary wet strength agent can be the dry weight of cellulose fiber per day ... ". Furthermore, when used, the total strength of the wet strength agent may be from i to 20 pounds of dry weight of cellulose fiber per mouth. The wet fabric can then be dried so that the final dry fabric has an outer layer of at least-latex-treated fiber dimensions. Other features and aspects of the invention are discussed in more detail below. [Brief description of the drawings] The present invention will fully disclose those skilled in the art (including the best mode), which will be described in more detail in the rest of this specification, including referenced additional drawings . The first diagram is a schematic flowchart of one embodiment that can be used in the papermaking process of the present invention. The first diagram is a schematic flowchart of one embodiment that can be used in the papermaking process of the present invention. The second figure is a schematic flowchart of another embodiment which can be used in the papermaking process of the present invention. The fourth figure is a schematic illustration of an example of a device that can be used to measure the degree of shedding of tissue products. Θ Continued page P K00 1 -08 I 8-1 Please note the sickle page) 9 200300810 Description of the invention, _ Stomach reference number indicates the same or similar element or feature of the present invention in repeated use in this specification and drawings . [Embodiment] Now, reference will be made in detail to this issue.

Face raised. Examples are provided by way of explanation of the invention, but do not limit the name. In fact, those skilled in the art can easily make various corrections and changes according to the present invention without departing from the spirit of the present invention. For example, features that are described or described in one embodiment may be used in another embodiment to create another embodiment. Therefore, the present invention should cover such amendments and changes as within the scope of the attached patent application, and their equivalents. Roughly, the present invention is directed to a tissue product comprising a multilayer paper fabric having an outer layer formed of at least-cellulose fibers coated with latex. Latex can form an elastic connection with cellulosic fibers, so that the fabric produced is elastic, strong, and can only produce cotton. Once you ’re done, the cotton linters and sheds. "Tissue paper products" as used herein generally refer to various papers,

明 σ, such as tissue paper, bath paper, paper towels, napkins, etc. The weight of the thin paper products of the present invention is less than 80 grams per square meter (gsm), which is less than 6 per square meter in this case. Gram, and in some embodiments between 10 and 60 revolutions. : A variety of materials can be used to form tissue paper products. For example, the materials used to make tissue products can include fibers formed by various pulp processes (such as cowhide, our table ’sulphite pulp, and mechanical pulping temples). Pulp fiber and quasi-cork fiber, their average fiber „, factory reduction, quasi-length based on length and weight on average is greater than 1mm, specifically between 1 ~ k η to 5mm. Such softwood fibers can be Dagger (but not limited to this) North and South softwood, mahogany, red cedar, reverse] Continued page ΡΚΟΟ 1 -08 1 8- (When the description page of the invention is insufficient, Becky-20030220 -February 20, 2〇03 Please Note and use continuation page) 10 200300810 、 Instructions of the invention, Hemlockia spiralis, pine (ie southern pine), spruce adult, etc. Applicable to the quotient of the present invention: "), and the combination of these fibers

Commercially available pulp fiber products from Kimbedy-CIark. Hardwood fibers produced under the trademark "LongIac-19", such as eucalyptus, maple ’white sticks, mountain poplars-used. In the specific example 10, Eucalyptus, ', can make ^ M, especially can increase the softness of the fabric. Eucalyptus fiber can also improve the pores of bright and shiny materials…% plus opacity, and changing the fabric structure of the fabric has increased the capillary capacity. Furthermore, if the second fiber of the desired raw material can be used, such as 1. Reduced-dimensional pulp, its sources include newsprint, recycled cardboard, office waste news, ^ .. ^ ^ AI, AI ΰ In addition, other natural fibers can also be used in the present invention, such as T such as Lümu hemp , Sabai hundred grass, milkweed thick silk, Lililai, etc. In addition, in some examples, synthetic fibers can also be used. Some suitable synthetic fibers can include (but not limited to) snail fiber, B Polyvinyl alcohol copolymer fibers, polyolefin fibers, polyesters, etc. As described above, the tissue paper product of the present invention contains at least-multilayer paper fabrics. The tissue paper product may be a single central layer tissue paper product. Layered (ie, having multiple layers); or a multi-layered tissue paper product in which the fabric forming the multi-layered tissue paper product itself may be single or multiple layers. For example, in an embodiment A 'tissue paper product includes three layers A central layer consisting of eucalyptus fibers and northern softwood kraft fibers. If desired, these layers may also include a mixture of multiple fibers. However, it should be understood that tissue products may include any number of interlayer or Layer, and can be made from many kinds of fibers. According to the present invention, 'latex is used in cellulose fiber to reduce lint and shedding of the final tissue product. The "latex" used here refers to the natural 0th order. Pages (please note and use continuation pages when the invention description page is not enough) PKO〇l-0818-Becky-20〇30220 -February 20, 2003 11 200300810 Description of invention, ¾ The stomach is the main water-like liquid system, polymerization Natural or synthetic colloidal dispersion of materials. The glass transition temperature of the latex suitable for the present invention is usually less than 3 so that the elasticity of the most textile fabrics will not be limited. Furthermore, the glass transition temperature of the latex is usually greater than -25 to minimize the viscosity of the latex & for example, in some embodiments' the glass-breaking transition temperature of the latex used in the present invention is between _ ton and Μ υ, and in some implementations In the example, it is between -10 and 0. The latex used in the present invention is usually nonionic or anionic to help the application of the rhyme. For example, some of the Suitable latexes include (but are not secretive of) negative acetophenone-butadiene copolymers, polyethenyl acetate homopolymers, acetoacetate-acetate copolymers, ethylene acetate propionic acid copolymers Polymers, ethylene-vinyl gaseous copolymers, ethylene-vinyl acetate dipolymers, acrylic polyethylene gaseous copolymers, acrylic acid 'nitrite polymers, and any other Suitable anions are known in the art. The electronic valence (anionic or non-ionic) of the above-mentioned latex can be easily changed. Such a technology has already been used. In the preparation process of latex, a stable price with the desired electricity price is used. An example of a suitable latex is described in U.S. Patent No. 384, et al., The entire contents of which are incorporated herein by reference. · Fibre =: No =: Latex is usually added to the cellulose mat on the "wet end" of the papermaking process. The term "wet end" as used herein refers to any stage in the papermaking process where the fabric is left to dry or after drying. For example, in some embodiments, milk = can be added to the papermaking raw materials of the machine's "dumping tank", cleaning storage tanks, or directly to the front rafter, etc. 2: After the raw materials are made into wet fabric, Add human latex. For example, in some embodiments: latex may be sprayed or printed onto a wet fabric surface. For example, in the embodiment

ΞContinued on the next page PK00 1 -081 8-B Please note and use (continued) In 200300810, the wet fabric passes through the paper machine at any position. Description of the invention, the f-selling solution will be sprayed on the fabric where: ===: where in the paper program, the multilayer paper fabric is: two Γ glue. For example, in the-embodiment, the latex is incorporated into the outer surface of a two-layer paper fiber. Milk in the outer layer of tissue paper products: defines the raw lint and shedding of tissue paper products. J can reduce the production of tissue paper products. The multi-layered paper fabric used to form tissue paper products has a stiffness of two, which can be achieved by many different technologies. For example, you can add less gift gel. Example towels are based on the dry weight of the fibrous material. The amount of latex added is 60 pounds (60 lb / T) per ton, and in some embodiments it ranges from 1 to 40 lb / MT. In some embodiments, it ranges from 0.1 to 20 lb / MT. In addition, in specific layers, the amount of latex added is usually less than 3% of the dry weight of the fiber material, in some embodiments it is between 0.05% and 2%, and in some embodiments it is between 0.000 and 0.000. Between 5% and 1%. Further, in some embodiments, the amount of latex added is less than 3% of the dry weight of the entire tissue product, which is between 0.05% and 2 ° / 〇 in a certain embodiment, and in some implementations. Examples range between 0.05% and 1%. Further, the stiffness of the fabric can be reduced by adding only pulp to the outer layer of the fabric. For example, in one embodiment, using three layers of paper-based fabrics' allows each outer layer to contain latex, while the inner layer is completely free of latex. In another embodiment, the inner and outer layers of the 'three-layer fabric may be substantially free of latex. It will be appreciated that 'when referring to "substantially free of" latex, it is possible that a small amount of latex is present. However, this small amount of latex is usually added by the outer layer

0 Continued page ρΚΟ〇1 -08 1 8-B (When the description page of the invention is insufficient, please note and use the continuation page) ecky'20030220 -February 20, 2003 13 200300810 The description of the invention is caused by the latex and is generally It does not affect the stiffness of tissue products. If desired, latex can also be added to the cellulose fibers by precipitation aid to help the latex stay on the fibers. For example, it is useful to add a "reaction composition" to the cellulose fibers. The reaction composition can form a bond (ie, covalent, ionic bond, etc.) with an anionic group on the cellulose fiber. For example, in one example, a cationic composition can be used to form an ionic bond with a free carbonyl group on the fiber. Such a reaction composition can reduce the negative valence of the entire fiber, and in some embodiments, even make the fiber become positive valence. Therefore, when latex is added to such electricity-modified fiber, the latex can be easily left on it. In general, many reaction compositions can be added to cellulosic fibers to aid in the retention of latex. Under normal circumstances, such a reaction composition is also expected to have additional functions, such as the ability to increase strength and / or softness. For example, in certain embodiments ' -wet strength agents may be added to further increase the strength of tissue paper products, and to aid in the retention of latex. As used herein, a "wet strength agent" is a substance that, when added to cellulose fibers, allows the ratio of wet geometric tensile strength to dry geometric tensile strength of the final product or sheet to exceed 0 ". These substances are often referred to as "permanent" and "temporary" moisturizers. Such a technique: the well-known 'temporary and permanent wet strength agents' sometimes also have the function of dry strength agents to improve tissue paper products when dry. The strength of the wet strength agent can vary, depending on the desired characteristics of the tissue product. For example, in some embodiments, the total amount of wet strength agent added to the cellulose fiber may be between ( Based on the dry weight of the fiber material) per mouth] between ib ib / τ) and 601b / T, in some embodiments between η · to Er ^ 200300810 Invention Description $ Sale; 1; between ' In some embodiments between 7 lb / T and 13 lb / T. Wet strength agents can be added to any layer of multilayer paper fabrics. Suitable permanent wet strength agents are usually soluble in water, less cation or polymerized resins 'It can cross-link itself (homogeneous cross-linking) or with cellulose or other compositions of wood fibers. Examples of such compounds are disclosed in U.S. Patents 2345543; 29261 16; and 2926154, which are incorporated herein by reference. One of these classes of agents includes poly -Epoxy propane, polyamino compound epoxy propane or polyamino compound-amine epoxy propane resin, collectively referred to as "PAE resin". Examples of these materials are described in US Patent No. 3700623 to Keim and No. 3772076 in Keim, which The contents are incorporated herein by reference and these materials are sold by Hercules, Inc. (located in Wilmington, Del.) Under the trade name "Kymene", that is, Kymene 557H or 557LX. For example, Kymene 557LX is a polyamino compound epoxy The chloropropane polymer 'which contains cationic groups and can form an ionic bond with an anionic group on the pulp fiber' also contains an azetidinium group, which can form a covalent bond with a carbonyl group on the paper cover fiber and act with the polymer branch when acting Other suitable materials include base-activated polyurethane-epichlorohydrin resins, which are disclosed in U.S. Patent No. 3885 to Petrovich, U.S. Patent No. 3899388 to Petrovich, and U.S. Patent to Petrovch No. 4 丨 29528, U.S. Patent No. 4147586 to Petrovich, U.S. Patent No. 4 ^ 29 ^ to Van Eanam, in which Herein incorporated by reference. Polyethyleneimine resins are also suitable for fixing fiber-to-fiber bonds. Another type of permanent wet strength agents include amino resins (ie, urea_formaldehyde and melamine-formaldehyde). 0Continued The next page (please note and use when the description page of the invention is not enough, Continue W) PKOO! -08l8-Becky ~ 20030220 -February 20, 2003 2003, 200300810 Invention description, if the continuation page is used, the permanent wet strength agent can be added The cellulose fiber is added in an amount based on the dry weight of the fiber material, between i lb / T and 20 lb / T, and in some embodiments between 2 lb / T and 10 〇b / T Between, and in some embodiments between 3 lb / T and 6 lb / T. Temporary wet strength agents can also be used in the present invention. Suitable temporary wet strength agents can be selected from agents known in the art, such as diacetaldehyde starch, polyethyleneimine, mannan galactan gum, and ethylenediamine. Aldehyde, and diacetaldehyde mannogalactan. Acetate amino compound wet strength resins are also useful.

It is described in Darlington et al. U.S. Patent No. 5,466,337, the entire contents of which are incorporated herein by reference. Useful water-soluble resins include polypropylene amine resins such as those sold under the trade name Parez, Parez 631NC, which is sold by the American Cyanamid Company (Stanford, Conn). Coscia et al., U.S. Pat. No. 3,556,932 and Wiuiams et al., No. 355 6933, generally describe such resins, and their entire inner valleys are incorporated herein by reference. For example, "parez" usually includes a polypropylene amine-glyoxylic acid polymer which contains a cationic hemiacetal radical and can form an ionic bond with a cellulose radical or a hydroxide radical on a cellulose fiber. These bonds increase the strength of the pulp fiber fabric. In addition, because hemiacetal groups are easily hydrolyzed, the wet strength provided by such resins is primarily temporary.

Guerro et al., U.S. Patent No. 4,605,702 (herein incorporated by reference) also describes a suitable temporary prepared by reacting a vinyl ammonia polymer with glyoxal and then basically treating the polymer in an aqueous solution. Wet strength agent. Similar resins are also described in U.S. Patent No. 4,603,176 to Biorkquist et al., 593 5 3 83 to Sun et al., And 6017417 to Wendt et al. (Continued pages) Use continuation page) ^^ 001-0818-Becky-20030220 -February 20, 2003 16 200300810 Description of the invention_page For reference, the entire contents are incorporated herein. The temporary wet strength agent provided by the manufacturer is usually in the form of an aqueous solution. In some embodiments, the amount of cellulose fiber (based on the dry weight of the fiber material) is 1 lb / T to 60 lb / T. And in some embodiments between 3 lb / T and 40 lb / T, and in some embodiments between 4 lb / T and i5. If desired, the pH of the pulp can be adjusted before the resin is added. For example, the pH of Parez resins in use is usually between 4 and 8. A chemical debonding agent can also be used to soften the fabric and help the latex stay on the fabric. Specifically, chemical debonding agents can reduce the amount of hydrogen bonding in one or more layers of the fabric, resulting in a softer product. The amount of debonding agent added can be varied according to the characteristics desired for the final tissue product. For example, T 'In some embodiments, the debonding agent can be added in an amount of 1 lb / T to 30 lb / T (based on the dry weight of the fiber material), in some embodiments it is between 3 lb / T to 20 lb / T, and in some embodiments between 6 ib / τ to 15 lb / T. Debonding agents can be added to any layer of the multilayer paper fabric. Any substance which can be added to cellulose fibers and which can improve the softness of the fabric by breaking hydrogen bonds can generally be used as the debonding agent of the present invention. In particular, as described above, it is generally desirable that the debonding agent has a positive valence to form an ionic bond with an anionic group on the cellulose fiber. Some suitable positive debonding agents include, but are not limited to, quaternary ammonium compounds, imidazolinium compounds, bis-imidazolinium compounds, diquaternary ammonium compounds, polyquaternary ammonium compounds, ester functional quaternary ammonium compounds (ie, tetrafatty acid trialkanes) Ester salts), phospholipid derivatives, polydimethylsiloxane and related cationic and nonionic silicone resin compounds, fat and carboxylic acid derivatives, monomers and glycan derivatives, polyoxygen Pages (please note and use continuation pages when the invention description page is insufficient) PKOOl-0818-Becky-20030220 -February 20, 2003 \ η 200300810 Invention description $ Sell and buy; Shiyan hydrogen compounds and so on. For example, some suitable debonding agents are described in

U.S. Patent No. 5,998, Jenny et al .; 5,730,839 Wendt et al .; 621 1 139, Keys et al .; 5,430,67, Phan et al .; and European Patent WO / 0021918, the contents of which are hereby incorporated by reference. Incorporate it. For example, Jenny et al. And Phan et al. Describe a variety of quaternary bond debonding agents (ie, quaternary fatty acid trisalinated hydrocarbon amine esters) that are suitable for the S-class bases of this month. In addition, Wendt et al. Describe imidazolin quaternary debonding agents suitable for use in the present invention. Further, Keys et al. Described polyester polyester quaternary debonding agents useful in the present invention. Other suitable debonding agents are described in Kaun U.S. Patent No. 5,9665 and Funk et al. 5,558,873, which are incorporated herein by reference. In particular, Kaun discloses the use of various cationic silicone resin compositions as softeners. Although the reaction composition, as described above, can be added to cellulose fibers to help the latex stay on it, it should also be understood that such a composition can also be used after the latex is added. In particular, the present invention does not limit the order of addition of latex and reaction composition. For example, in one embodiment, latex, wet strength agent, and debonding agent may be added to the fabric in percent. In another embodiment, wet strength agents, latex and debonding agents may be added to the fabric continuously. Tissue paper products made according to the present invention can generally be made according to various papermaking methods known in the art. In fact, any procedure capable of making paper fabrics can be used in the present invention. For example, the papermaking process of the present invention can use wet pressing to start, air dry, crepe air dry, not crepe air dry, repeat crepe once, repeat crepe, calender, print, air laying , 18 200300810 Description of the invention and other steps for processing paper fabrics. ~~ ^ 一 ~-In some embodiments, in addition to using various chemical treatments, as described above, the papermaking process itself can be selectively modified to produce tissue paper products with material properties. For example, a papermaking process can be utilized to form a multi-layer paper fabric, such as US Patent No. 5,129,988 disclosed by Farrington, Jr., et al .; Edwards Temple No. 5,494,554; and kappa surface No. 5,526,665, the contents of which are incorporated herein Refer to it. In this regard, various embodiments of the method for forming a multilayer paper fabric will now be described in more detail. Please refer to the figure, which shows a method for manufacturing a wet-pressed tissue paper according to an embodiment of the present invention, while referring to laying forming, in which two wet fabric layers are individually formed and then combined to form a single- Fabric. In order to form the -fabric layer 'come the duvet-fibers (whether hardwood or softwood) in a manner known in papermaking technology, and then transport this fiber to the first raw material trough' where the fibers are stored in the form of a suspension solution ... Pump pump supplies the required amount of suspension to the suction side of the fan pump pump. If desired, the metering pump (5) can be supplied with additives (ie, latex, reaction composition, etc.) to the fiber release water (3) is also mixed with the fiber-assisted floating liquid. The entire fiber mixture is then pressurized and delivered to the front E (6). The water suspension leaves the front E⑹ and sinks on the endless papermaking tissue ⑺ above the suction box ⑻. The pressure in the suction box is below the emptiness and the water in the suspension can be sucked out, so the first layer is formed. In this example, the raw material flowing out of the head box ⑹ will be regarded as the "empty 4 Yu Γ I 'during the final drying, this layer will be placed away from the dry surface. The forming structure can be any forming fabric, such as fiber support Index 15 or 19 200300810

Invention description liM larger organization. Some suitable shaped tissues include, but are not limited to, single-layer tissues, such as those available from Albany International Corporation, Appleton Wire Division, Menasha, Appleton Wire 94M, Wis; double-layer tissues, such as obtained from Asten Group, Appleton, Wis · Asten866; and a three-layer structure, such as Lindsay 3080 ° from Lindsay Wire, Florence, Miss, when the papermaking fiber leaves the front box, the concentration of the suspended aqueous solution is between 0.05% and 2%, and in one embodiment is 0.2%. The first front box (6) may be a layered front box having two or more layered compartments, and may convey a layered first wet fabric layer, or may be a mixed or homogeneous first wet fabric layer. Single layer front. In order to form the second fabric layer, specific fibers (whether hardwood or softwood) are prepared in a manner known in papermaking technology and sent to a second raw material tank (11), where the fibers are stored in the form of a suspended aqueous solution in among them. A raw material pump (2) supplies the required amount of suspension to the suction side of the fan pump (14). A metering pump (5) can supply additives (ie, latex, reaction composition, etc.) to the fiber suspension as described above. Additional dilution water (13) is also mixed with the fiber suspension. The entire fiber mixture is then pressurized and delivered to the headbox (16). The aqueous suspension leaves the front centimeter (16) and is settled on a ring-shaped papermaking structure (17) above the suction box (18). The pressure in the suction box is below the emptiness and the water in the suspension can be sucked out, thus forming a second wet fabric. In this example, the material flowing out of the front 11 (16) is considered as the “dryer side” because this layer will eventually come into contact with the dry surface. Eight groups of openings (17) suitable for forming the second frontal structure (17), including the first mentioned the forming continuation sheet used to form the first front box forming structure) a continuation page ΡΚ001-0818-Bee 20 200300810 Invention Description $ sells stomach material. 1-4 After the soil cloth and the second wet fabric layer are formed, the two fabric layers are brought into contact with each other (in the form of a tile), and the concentration is ι0% to 30%: 1: 2: The concentration is charged, and it is generally expected that the concentration of the two wet fabrics is substantially the same. 2㈣-The purpose of the wet fabric layer in contact with the second wet-to-tile pattern on the roller (19). The contacted fabric is sent to the felt on the empty box (20). The traditional method can be used to dehydrate, dry and lift the combined fabric. More specifically, the tile is further advanced. It is dewatered and conveyed to a dryer (30) (that is, a Yankee dryer) using a ... wheel (31), which is used to squeeze the k-knife out of the fabric (the water will be absorbed by the felt) and let The fabric sticks to the surface of the dryer. The 'fabric is then dried and selectively rolled onto a roller (32)' to be subsequently transformed into the final creped product. The second figure is a flowchart which can be used in another embodiment of the papermaking process of the present invention. For example, it shows a layered front E (41), a forming structure (42), a forming roller (43), and a papermaking. Felt (44), a pressure roller (45), a Yankee dryer (46) and a crepe scraper (47). In addition, a variety of gears (not labeled) or tensioning rollers used to define the organization shown in the figure are shown, and their actual effects can be different. In operation, the layered front head box continuously shoots a layered raw material between the forming tissue (42) and the felt (44), and the layered raw material ejection is partially wrapped around the forming roller (43). As the newly formed fabric traverses the arc-shaped portion of the forming roller, the water in the suspended aqueous solution passing through the forming tissue (42) is removed by centrifugal force. When the forming fabric (42) is separated from the felt (44), the wet fabric will be with the felt (44) and sent to the Yankee dryer (46). pii continuation page (please note and use the continuation page when the invention description page is insufficient) 2 1 ^ 〇〇l-〇818-Becky-20030220 -February 20, 2003 2UUJU0810 Invention Description It;

On the Yankee Dryer (46), the knee is a top of the adhesive in the form of a floating liquid. Therefore, the chemical used in Rongji is continuously added to the suspension. If a sprayer is used, 1 can be added to the surface of the machine in any convenient way. The dryer (46; "continuous adhesive solution sprayed on the drying point to the knife (ο) I will be immediately connected to the scale and crepe and dry. Read the adhesive film has enough time to spread to the weaving: : Some :: ', latex' reaction composition can be added when the blood is dry *. For example, the spray nozzle can be divided into I: the agent-add the additive to the drum, The fabric is passed through the two layers: The agent is added to the outer layer of the fabric. In some embodiments, the point of addition on the surface of the dryer (46) is immediately followed by a fresh adhesive film in the bathroom + ^ ^… ": The fabric can be used for a sufficient time before contact. The method and technique for adding additives to the drying drum are described in more detail in Smith: U.S. Patent No. 5,853,539 and Smith et al., 59936G2, for reference. These are incorporated herein. The wet fabric is spread on the surface of the dryer (46) by a pressure roller ⑹ with an applied pressure. In the embodiment, the applied pressure is 200 pounds per square inch After the compaction or dehydration step, the concentration of the fabric is usually 30% or more. The Yankee dryer's steam energy and hood drying capacity are applied to this fabric to achieve a final concentration of 95% or more, specifically 97% or more. The temperature of the sheet or fabric will immediately exceed the crepe scraper (47) For example, the temperature measured by an infrared temperature sensor is usually 250 ° C. The fabric can also be dried using non-compressive drying technology, such as air drying. The air dryer is used to pass air through the fabric without applying any machinery. Press 22 200300810 Description of the invention® sheet force to achieve the effect of removing moisture from the fabric. Air drying increases the volume and softness of the fabric. Examples of such techniques are disclosed in US Patent No. 5048589 by CGQk et al .; Sudall et al. No. 5399412; et al. 5510001; Rugowski et al. 55913〇9; and et al. 601 74 17 are incorporated herein by reference. For example, refer to the third figure, which illustrates An embodiment of a papermaking machine that can be used to form an uncreped dried tissue product. For simplicity and ease of understanding, various tensions are used to roughly define the movement of the tissue. The wheels are shown without labels. As shown in the figure, a papermaking head box (11) can be used to eject or place a floating solution of papermaking fiber g on an upper forming structure (丨 丨 2). Then, a suspension aqueous solution of the fibers Is sent to a lower formed tissue (11 3) which can be used to support and carry this newly formed wet fabric (111) down during the procedure. If desired, the wet fabric (111) is formed tissue (113) The dehydration of the wet fabric (111) can be completed during the support period, such as by emptying. Then, the wet fabric (111) is sent from the forming tissue (113) to the conveying tissue (U7), during which the wet fabric The solid concentration of (111) is 10% to 35%, specifically between 20% and 30%. As used herein, a "conveying structure" is a structure that is located between a forming area and a drying area in a fabric manufacturing process. In this embodiment, the 'transporting tissue (117) is a patterned tissue with protrusions or embossing marks' as described in Wendt et al., U.S. Patent No. 6017417. Generally, the moving speed of the conveying tissue (117) is lower than that of the forming tissue (113) to improve the "MD stretchability" of the fabric, which usually refers to the tensile tension of the fabric in the direction of the length of the machine (in terms of failed samples) Pull percentage indicated). For example, the relative speed difference between the two organizations can be between 0% and 80%. E] continued page (if the invention description page is insufficient, please note and use the continued page) PK〇〇I-〇8I8 ~ Becky-20030220 -February 20, 2003 23 200300810 Description of the invention, in some embodiments, it is greater than 1G%, and in some embodiments, it is between #% and 60%, and in some embodiments it is between 15% and 15%. % To 30%. This generally refers to "rapid delivery. One useful method of performing rapid delivery is described in US Patent No. 5,667,636 to Engel et al., The contents of which are incorporated herein by reference. Delivery to tissue (117) can be achieved by / For example, in one embodiment, the empty shoes (118) can provide negative pressure, so that the forming tissue (113) and the conveying tissue (117) will merge at the leading edge of the empty slit at the same time. The pressure supplied by the empty shoes (118) is between 10 and 25 inches of mercury. As mentioned above, the empty shoes (丨 i 8) (negative pressure) can be supplemented or replaced by using positive pressure on the opposite side of the fabric. To blow the fabric to the next tissue. In some embodiments, other empty shoes can also be used to help attract fibrous tissue (111) to the surface of the transport tissue (117). Then, from the transport tissue (117), The fibrous tissue (m) is sent to the dried tissue (11 9). When the wet fabric (1 丨 丨) is supported by the dried tissue (113), the fabric (1 1 1) is passed through the dryer (121) Dry to give a solid concentration of 95% or more. This is dried (121) Remove moisture from the fabric (n) by passing air through the fabric (m) without applying any mechanical pressure. Drying can also increase the volume and softness of the fabric (111). For example, in a In an embodiment, the dryer (121) may include a rotatable, perforated cylinder and a cover, and the cover may receive the cylinder when the dried tissue (119) carries the fabric (111) through the upper part of the cylinder. The hot air blown out by the perforation. The heated air is forced to pass through the circular teeth of the dryer (丨 2 i) and removes the remaining moisture in the fabric (111). It is forced through the dryer (121) through the fabric (111) The temperature of the air can be changed, but it is usually between 250F and 500p. It should also be understood that other uncompressed drying [3 Continued page (if the invention description page is insufficient, please note and use the continued page) PK001 -0818-Becky-20030220 -February 20, 2003 24 200300810 Description of the invention $ Sale method 'such as microwave or infrared heating can also be used. As mentioned above, latex can sometimes be added to the fabric when the fabric passes through the paper machine according to the procedure. ... such as 'in-specific embodiments' Latex can be sprayed onto the fabric. Spraying can improve the ability of the latex to generally maintain on the outer layer of the fabric, thereby better restraining the shedding on the outer layer of the fabric. In general, latex can be sprayed onto the fabric at any time during the fabric formation Above, for example, in the embodiment shown in the third figure, a nozzle (140) can spray the latex onto the fabric (in) after the fabric (111) is fed to the fabric foot and before it is dried. However, it should be understood that the nozzle (14) can be positioned at any desired position. Any device suitable for spraying additives onto a paper tissue can be used in the present invention. For example, 'one example of a suitable spraying device includes an external mixing, air atomizing nozzle, such as a 2 mm nozzle available from V.j.B Systems, Inc (Tucker, Ga.). Another usable nozzle is available from

Systems, Inc. (Milwaukee, Wisconsin) η 1/8 "vV-SS 650017 VeeJet Nozzle. Other spraying techniques and equipment are described in U.S. Pat. No. 5164 (M6, the contents of which According to the present invention, there are ten desires to control the percentage of latex remaining on cellulose fibers. Specifically, one or more variables, such as the order of adding latex and reaction composition, the type of latex The type of the reaction composition, the addition amount of the latex and the reaction composition, and the like can be selectively changed so that the final retention percentage is within a desired range. For example, in some embodiments, it is expected that the latex retention The percentage on the fiber is at least 60%, and in some embodiments it is between 75% and 90%. The retention percentage of the latex on the cellulose fiber can be based on the following formula Q Continued PK001-0818 -Bee _ 面 鬼 顾) 25 200300810 Description of the invention, _:!; To decide: Percent retention (%) = 100 × [(Lt — Lf) / Lt] where

Lt is the total amount of latex added to the pulp; and

LF is the amount of latex remaining in the filter after the pulp is removed from the filter. For example, LF can be determined by the "turbidity" of the filter. The term "turbidity" as used herein generally refers to the optical clarity of a substance, which can be measured, for example, using a Model DRT 100B turbidity from HF Scientific, lnc. The degree is expressed as "suspension turbidity unit" (N. For example, in an embodiment, a known "^" 値 can be used to establish a linear regression equation, that is, LF = ax + b, and is widely used The "X" is turbidity. "A" and "B" in the "by controlling the retention percentage of latex, the strength and rigidity added to tissue paper products can be properly balanced as desired. Furthermore, a higher retention percentage can allow

-Lower total latex, if the retention percentage is lower. Therefore, because the shoulder needs a lower amount of latex, the IJ ^ k supply cost can be reduced to a certain extent, and the efficiency of the papermaking process is really improved. With both hands, flawed tissue paper products can be weaker and produce more Low-position cotton weaving and stripping% Same as Luan 6, the thin paper products at the end of the flaws maintain ideal elasticity and softness. Example Latex maintenance capacity determined by turbidity is proven. First, it is made from 1 (white kraft paper cork fiber—made from fiber mud. This pulverizer is pulverized for 5 minutes, so that the f, U, and f a U can be 1.6%. Then,

S Continued page PK00J-08J8-B (When the description page of the invention is insufficient, ecky-20030220 -February 20. 2003 Please note and use continued page) 26 200300810 Description of the invention $ Sale page The slurry is diluted to a concentration of 0.33%. Then ‘take four samples of fiber material (volume 909 nd, weight_ 3 ag) from the pulp and place them in a beaker. Then, an anionic acetophenone-butadiene latex solution (solid content (depending on the weight of the solution) was obtained from Dow Chemica brand "dl_239") was added to each fiber raw material sample, and the addition amounts were as shown in the table As shown. Once the latex is added, the raw material sample is diluted to 1000 Å with water. Then wait for 10 minutes and pass the sample through a Freeness Tester screen to filter according to the TAPPPI test method τ227.

The bottom and side filters were collected and mixed together for this measurement. The amount of anionic latex on the cellulosic fabric will be determined by measuring the "turbidity" of the material. Specifically, the Model DRT 100B / m turbidimeter was obtained from hf Scientific, Inc., which was first calibrated with a standard solution in a test tube. 40 ml of the filtrate was then collected and added to a test tube. This tube is then placed in a turbidity measuring instrument, which has a light source ' and provides light perpendicular to the test tube. Then read the final turbidity from the turbidity meter and record it green. The final results of each sample were compared with a control sample without pulp. The results are also shown in Table 1. Table 1: Turbidity test results Sample emulsion amount (lbs / ton) Turbidity test with pulp without pulp Control group 0 44.4 N / A 1 5 52 47 2 10 87 83 Ξ Continued on page PK00] -08 I8-Bec (Invention When the description page is insufficient, please note and use the continuation page) ky- 2 0 〇3 0 2 2 0 -February 20, 2003 27 200300810 Invention Description 1 Selling page 3 20 165 1 60 4 40 1 274 X \ J \ J __268 ----------- As shown above 'At the same amount of latex, the excess of the sample transferred is slightly higher than the turbidity of the sample. Although not limited by theory, it is believed that the result of this result 'is that a small amount of pulp particles will affect the turbidity. After the fiber is screened, the amount of latex remaining in the filter will be measured by the King-Regression equation, where the residual amount of the latex in the transition (⑽ / per: US) is the y variable, and the measured control The sample turbidity is “χ”. In the data provided in the table, the final regression equation is: y = 0.l504x—1.8589, where the correlation coefficient (R2) is equal to 099. Example 2 The ability of milk to combine with fiber raw materials is demonstrated. First, a fiber slurry was prepared from 10% bleached T-paper cork pulp fibers. This slurry was pulverized for 5 minutes in a pulverizer to make the solid concentration of 16%. Then, the mud was diluted to a concentration of 0.33%. Then, six samples of the fiber raw material (volume 109 ml, weight 3 g) were taken from the pulp, and they were placed in a 1000-m beaker. Thereafter, an anionic epithelium-butadiene latex solution (solid content (based on solution weight) of 0-5 ° / 〇) (available from Dow Chemical, trademark "DL-239") was added to each fiber material core 'The added amounts were 20 rations / d. In addition, Yimi Junkoulin Grade IV Debonding Agent (available from Hercules, inc., Under the trade name "PrOsft TQ-1〇03") and "Parez" Polyacrylamide temporary wet strength agent (Also as a dry strength agent) Yehusi / Renewal 1 Saying the month? (Insufficient use, please note and make the title page)

Becky-20030220 -February 20, 2003 28 200300810 Description of the invention $ Selling stomach is added to the raw materials at 16.5 lb / T and 6.5 lb / T, respectively. The order in which these additives are added to the sample is different for each sample, and the order is shown in Table 2. Each additive is separated from the next additive by 5 minutes. Once the additives were added, the raw material samples were diluted to 100 ml with water. After 25 minutes', the sample was filtered through a Freeness Tester screen according to the method described in Example 1. The turbidity and the amount of latex remaining in the filter are determined as described in Example 1. After obtaining, according to the following formula, the amount of latex remaining in the filter is used to calculate the percentage of anion remaining on various cellulose fabrics:

Percent retention (%) = 100 × [(LT — LF) / LTJ where LT is the total amount of latex added to the pulp; and LF is the amount of latex remaining in the pulp after the pulp is removed from the filter. the amount. The results are shown in Table 2. Table 2: Sample results Sample first addition second addition second addition turbidity retention rate 1 debonding agent latex strength agent 38 — ^ _ 2 latex debonding agent strength agent 86-Λ C 3 strength debonding agent Milk U 51 J ~~ __ 〇r \ 4 & Bonding agent strength agent latex BU 37 5 Latex strength agent debonding agent 66 ^^-6 6 Strength agent latex debonding agent 67 Λ0 ^ _ Retention rate. For example, there is a minimum. As shown in the table, the order of addition of the chemical agent can affect the latex. For example, in samples 1 to 4, the debonding agent is the latex plus the previous home. 29 200300810

Haze coefficient The ability of latex to incorporate fiber raw materials.... The trowel is proven here. First, a + epidermal fiber slurry was prepared from 10% bleached dry cork pulp fibers. This slurry was crushed for 5 minutes in a line of slag meal slamming machine and the time was h6%. Then, the mud was diluted to a concentration of 0.33%. Then ‘take six samples of fiber material from the pulp (volume gift‘ one: 3 males! :) ’and place them in 1000 beakers, respectively. After that, Λ ς. / 、 ~ 〃 4 (solid content (according to the weight of the solution) is •.) (Passed from Dow Chemical, trademark "m Post # ^ i 冏 琛 DL-239") added to each fiber original family, the amount added In addition, a diaminoamine quaternary dehydration agent (obtained from Goldschmidt, Shang Zhangzhen "Δ" "N Shima Ar0surf pa-727") and p coffee "polypropylene amine temporary wet strength agent (also As a dry strength agent): It is also added to the raw materials, with the addition amounts of 16.5 lb / T and 6 5 Ib / T. The order of addition of some additions to the sample, each bismuth is different. The sequence is as shown in Table 3. The time between each additive and the next additive is 5 minutes. Once the additives are added, the raw material sample is diluted with water to ι〇〇〇〇〇 丨 After h minutes, according to the method described in Example 1. Pass the sample through a Freeness Tester screen. Then, measure the turbidity and retention percentage as described in Example 1 and 2. The results are shown in Table 3.

Debonding agent Table 3: Sample (%) First addition latex

Ucky-2003 0220 -February 20, 2003 30 200300810 Description of the invention, 3 strength agent debonding agent latex 48 73 4 debonding i strength agent latex 55 68__ 5 latex strength debonding agent ^ 55 68 ______ 6 1 strength agent Latex debonding agent 45 75 __ --- As shown in the table 'When using a diaminoamine quaternary compound, the effect of the order of addition of the chemical agent on the turbidity coefficient will not be the same as that of Example 2 As big as a bonding agent. Example 4 The ability of latex to incorporate fiber materials is demonstrated here. First, a fiber mud paddle was prepared from 100/0 white kraft softwood pulp fibers. This slurry was slammed in a pulverizer for 5 minutes to make its solid concentration 丨 · 6%. Then, the mud was diluted to a concentration of 0.33%. Then “take out six samples of fiber material (volume 109, weight 3 g) from the pulp” and place them in 1 beakers. Thereafter, an anionic styrene-butadiene latex solution (solid content (by weight of the solution) was 0.5%) (obtained from Dow Chemica brand "DL 239") was added to each fiber raw material sample 'addition amount 2 ( ) lb / T. In addition, the quaternary fatty acid trisalinyl amine vinegar debonding agent (available from Goldschmidt, trade names "" and "!"丨 Propylene 强度 temporary wet strength agent (also used as dry strength f agent) is also added to the raw materials, and the added amounts are 165_ and 65_, respectively. The order in which these additives are added to the sample is different for each sample, as shown in Table IV. The time between each additive and the next additive is as follows: points; one: once the additives are added, the raw material sample is diluted to _ Erli Daoyili with water, and the ^ ^^ passes the free tester according to the method described in Example 1. 31 200300810 A Freeness Tester screen came over to measure turbidity and percent retention. Then, as described in Examples 1 and 2. The results are shown in Table IV.

Example 5 The ability of latex to incorporate fiber materials is demonstrated here. First, a 'fiber slurry' was prepared from 10% bleached white kraft softwood pulp fibers. This slurry was pulverized in a line of pulverizers for 5 minutes' to give a solid concentration of 16%. Then, the slurry was diluted to a concentration of 0 33 0/0. Then, take out six samples of fiber raw material (volume 109 mi, weight 3 grams) from the pulp, and place them in the beaker. After that, a f-benzene acetophenone-butadiene latex solution (solid content (depending on the weight of the solution) of 0.5%) (obtained from Dow Chemica brand "DL_239") was added to each fiber original tincture sample, and the amount was added. They are 20 lb / T. In addition, dialkyl dimethyl quaternary debonding agent (available from Goldschmidt, trade name "Vads 0ft 137") and polypropylene amine temporary wet strength agent (also used as dry strength agent) are also added to the raw materials. The amount of Chinese 'added was 16.51b / T and 65 dices. (Add these, avoid the title page) 200300810 Description of the invention continued page The order of adding agents to samples is different for each sample ^ The order is shown in Table 5. Each additive is separated from the next additive by 5 minutes. Once the additives have been added, the raw material sample is diluted to 1005 minutes with water. 'After passing the sample through a freeness tester (Freeness Teste 0) according to the method described in Example 1. Then, according to the example ... Measure the turbidity and retention percentage. The results are shown in Table 5. Table 5: Samples of the results of phase 1 ------ The first addition of thorium bonding agent the second addition of the third addition of turbidity thorium 60 Retention rate (%) 65 2 latex debonding agent strength agent 81 48 3_ strength agent debonding agent latex 80 49 4 debonding agent strength agent latex 56 67 5 latex strength debinding agent 56 67 6 ^ strength agent latex debonding agent r 57 66 As shown above, the order in which the chemicals are added has an effect on the ratio of latex remaining on the fibers. For example, samples 4 and 5 produce low turbidity coefficients. Example 6 The ability of latex to incorporate fiber raw materials is here Proof. First, a fibrous slurry was prepared from 10% bleached kraft softwood pulp fibers. This slurry was pulverized in a column grinder for 5 minutes to a solid concentration of 1.6%. Then, the slurry was diluted to a concentration of 0.3 3%. Then four samples of the fiber material (volume of 909 m and weight of 3 grams) were taken from the pulp and placed in a 1000-mi beaker. After that, an anionic styrene-butane Ethylene latex solution (solid content (based on solution weight) is 0'5 / 〇) (obtained from Dow Chemica, "DL 239") added to each fibrilogen: ky ~ 20030220 -February 20, 2003 33 200300810

In the sample, the addition amount is 20 lb / T. "Furthermore," PrSoft TQ__ "," Ar〇 thank f M claw ", Vamoft We_16" and "Varis〇ft 137" were added to the sample BU 40 respectively, and the addition amounts were 16.5 lb / T. " ,is one

This kind of polyurethane epoxychloropropene sintering permanent wet strength agent can also be added to the raw material, and its added amount is 8.5 Lin. These additives are added in the order of debonding agent, strength agent and latex. Each additive is separated from the next additive by 5 minutes. Once the additives were added, the raw material samples were diluted to 1,000 claws per minute with water, and then the samples were passed through a freeness tester screen according to the method described in Example 1. Then, use the example described to measure turbidity and retention. The results are shown in Table 6. Sample Plant-Private, • Xiuling Baihe Debonding Agent Clouding Retention Rate (%) 1 Prosoft T (^ 1003 (Quizolin 4th Compound, 20 1 4 1 \ χ ^ / 94 2 ArosmfPA727G ^ Ammonia Diamine quaternary compound) 34 Q Λ 3 Vansoft ------ 〇 4 bonding agent) 24 91 4 Vansoft 137 (dialkyldimethyl quaternary compound) 41 78

Produces the lowest turbidity factor Example 7 The ability to form a soft tissue that produces only a small amount of shedding has been demonstrated. Nine tissue paper samples (samples 7-15) were produced on a paper machine, as described in the first figure and above. Specifically, two thin paper sheets are formed, and the two thin paper sheets are flatly adhered together to form a single sheet. This single sheet is then compressed, dried and creped. Individual stock tanks are used to form each separate tissue sheet. Air in the raw material tank [3 Continued pages (Please note and use continuation pages when the invention description page is insufficient.) P K 〇〇 ^ ~ ^ ^ ^ 8-Becky- 20030220 -February 20, 2003 34 200300810 Invention description continued page The side contains northern softwood kraft fiber (LL_19, available from Kimberiyciark), while the dry side raw material tank contains the plant fiber from Bahll Su., Inc •. In this HM5, the LL-19 fiber is borrowed from the refiner chain located under the raw material tank for 7 minutes. Each sample had a basis weight of 30 grams per square meter 'and contained 35% LL-19 softwood fibers and 65% eucalyptus fibers. In Samples 7-9, "Kymene 557 LX" was added to the dry side raw material tank from the lean-industrial, LX (a polyaminoepoxypropane dry water long-time wet strength agent) at an addition amount of 4 lb / T. 'And added to the air-side raw material tank with an addition amount of 4 lb / T. In addition, "P㈣'Polymeridamine's temporary wet strength agent (also used as a dry strength agent) was added to the air-side raw material pump in an amount of 0 to 3 ratios. In the sample 10-12 towels, "Kymene 557 Lx" was added to the raw material tank at the side of ㈣41b / T in an amount of 4 ib / T. The raw material tank was filled with air. After 15 minutes, the slurry was 6lbs / T @ an⑽⑽ DC- i 83-type Mimid (4th grade debonding agent, obtained from Meintym) is also added to the raw material tank on the dry side. Further, "卩 CA" & trimethoprim temporary wet strength agent (also used as a dry strength agent) It is also added to the air-side raw material pump, and its addition amount is between 0 and 7.5 lb / T. ^ Samples 13-15 are formed in the same way as sample 1 (M2, but an additional 20 lbs / T is added Airflex A_1〇5 (an ethylidene acetate ethylate copolymer latex 'from Air * PrGduets') into the air-side raw material tank. Further, polypropylene amine fermented temporary wet strength agent (also used as a dry strength agent) ) Is also added to the air-side raw material pump, with the addition amounts of 2 丨 b / T and 10b / T. The tensile strength, shedding and hardness of the shaped core are below Mrnmrnm) 200300810 Description of the invention $ 1 selling page strength ~ ~ The tensile strength is expressed as "GMT" (how many grams per 3 inch sample), it is a geometric mean tensile strength and is based on the MD tensile strength of the product and ^ 〇 Resistivity = Calculated as the square root of strength. MD and CD tensile strengths were determined using a Mτ_η_ Tensile Tester (available from MTS Systems Corp., Eden Praire, MN). Measure and cut in the machine direction and cross direction of the machine 3 inches wide thin:

sample. In each test, the sample was placed in the jaws of the tester, the range of facial tissue was set to 4 inches, and the toilet paper was set to 2 inches. During the test, it is connected to a computer with a data acquisition system (such as MTS Testw for Windows software) through a tester with a speed of 1G in./mine in the front. Read directly from the breakpoint on the computer screen to obtain Tensile strength of each sample. Electrical shedding 1

——In order to determine the abrasion resistance or tendency of the fibers to rub on the fabric, each fine person rubs a tissue paper sample and measures it by the following method. This test measures the abrasion resistance of a thin material on the surface of a horizontally reciprocating grinding stone. All counties tested for 4 hours at a temperature of 2rc ± rc and a relative humidity of 5% ± 2%. The fourth figure is a diagram of the test equipment. The friction shaft contains a stainless steel rod with a diameter of 5 ”, the friction part of which is t 〇 Xiao, deep 的 4 · 25” length of the stone pattern around the circumference of the rod “to form a friction shaft system perpendicular to the surface of the instrument and So that the friction part of the rod extends from the instrument surface to the entire length. On each side of the friction shaft is a guide pin with a royal button, one of which can be moved and the other fixed, separated from each other 4 , And the 4 wiper shaft is exactly in the middle. The movable pliers and guide pin can slide in a vertical direction, and the weight of the jaw ensures that the sample can have on the surface of the friction shaft—

S3 Continued page PK001 -08 1 8-B 4¾¾¾ Please note and make the face page) 36 200300810 Description of the invention _ stomach tension. '一 ·'-A die press with a die cutter was used to cut a strip with a width of 3, and a soil length of '05 × 8, which had two holes at each end of the sample. For thin paper samples, the MD direction corresponds to the longer dimension. Then, each test bar is weighed, and the minimum unit is 0.01 mg. Place each end of the sample on the guide pin and secure the sample with magnetic forceps. Then, let the movable jaw fall down and form a stable tension by rubbing the shaft. —Then, the friction axis is placed at a 15-degree angle from the central vertical line, and the test bar is moved horizontally back and forth by 20 turns (counting back and forth once) at a speed of 80 turns per minute. Loose fibers are removed. In addition, the friction shaft rotates in a clockwise direction (the direction when looking at the front of the instrument) at a speed of 5 RPMs. Then remove the magnetic sweet from the sample and remove the sample from the guide pin, and use compressed air (5-10) to blow loose fibers from the surface of the sample. The test sample was then weighed (the smallest unit was 0 3 mg) and the weight lost was recorded. Ten samples of each type of tissue paper were tested and the average weight loss in green was recorded in milligrams. The hardness (or softness) of the sacred hard Tang is evaluated on a scale of 0 to 6, where lower 値 indicates softer tissue and higher 値 indicates harder tissue. Twelve participants were asked to evaluate the sensation of the tip, wavy or cracked edges or spikes of the sample while the sample was in their hands. Ask participants to place two thin paper samples flat on a smooth table. The two samples overlap each other by 0.5 inch (1.27 cm) and are turned over so that the opposite side of the tissue paper sample appears during the test. Participants used their forearms / elbows on the table to open their hands on the samples with their palms down. Every 0 Continued pages ρ Κ 00 1 -os 18-B e i (please note the female page) 37 200300810 Description of the invention It] places where individuals put their hands and let their heart divide). Each participant put their fingers lightly. They gently moved the sample to the palm of their hands ... 乂 ... ‘this. Each participant then averaged and recorded ^ test the rating of thin, ·, and 、 samples. The results are shown in Table VII.

As shown in Table 7, the latex added in the present invention can provide a strong soft tissue product with a lower amount of shedding.

Example 8 The ability to form soft, low-volume tissue paper is demonstrated here. Three tissue paper samples (samples 16 · 18) were formed as shown in the third figure, but _ sheets were separated in two ^ flatly attached to the _ formed single _ sheet into uncontinuous dried tissue paper, As shown in the first figure. The cypress paper is formed by a two-layer head box. Before the second layer The lower layer of the top contains the eucalyptus fiber from Bahil Su, Inc., and the first 0 continued pages

Ρ κοο 1 -0 8 I8-B 38 200300810 Description of the invention, the upper layer of the continuation head E has northern softwood kraft fibers (lli9, available from Kimberly_Clark). The upper lamellae are formed from the centipede-derived t-fibers Γ. Each layer of tissue paper has its own raw material system (including raw material tank, metering pump, fan pump, and water flow treatment). The basis weight of each tissue paper sample is 30 grams per square meter and contains 40% LL_19 softwood fiber and 60% eucalyptus. Fiber (Each sheet is equal). In Sample 16, 4.5 lb / T of "Parez" polypropylene methamine temporarily wet strength agent (also used as a dry strength agent) and 16 5 lb / T of Mackernium DC_i83 (a kind of Mitoguline four-level debonding agent), Since Mclntyre, W) was added to the eucalyptus plant material tank to supply the double-layer front E and the upper sheet. In addition, 8 lb "" Parez "polypropylene ammonium temporary wet strength agent (also used as dry strength agent) was added to the LL-19 raw material. Using a refiner located under the raw material tank to refine the LL-19 fiber for 10 minutes Sample 17 was prepared in the same manner as Sample 16 except that when the solids concentration of the flakes was 20%, Airflex a105 (an ethyl acetate vinyl salt copolymer latex of 10 lb / T) was obtained. (From Ak PrQduets) was sprayed onto the lower eucalyptus sheet layer between the fast conveyer 4 and the full air dryer (third picture). Using a Hl / 8, VV-SS65〇17VeeJet nozzle (obtained Self-cooking coffee called ystems, Inc. (milwaukee, wisconsin) to spray latex on thin

a. The nozzle sprayed the latex onto the sheet at a 65-degree angle with a spray rate of 0.017 gallons per minute and a pressure of 40 pounds per square inch. In addition, a 6 lb / T "Parez" polypropylene amidamide temporary wet strength agent (also called a dry strength agent) was added to the LL-19 raw material pump. "The present 18 was prepared in the same manner as in the sample 17, but the lactation continuation sheet used was P CK00 1 -os] s ^ B ec (when the invention description sheet is insufficient, ky-20030220 -February 20, 2003 Please note and use the continuation sheet) 39 200300810 Glue is a must-have --- 2_ It is called "Γ: 9" latex (obtained from D〇W ^ hr wet, outside, 71b / T "Parez" polypropylene The "strengthening agent (also known as dry strength agent) is added to the LL-19 raw material pump. Strong production: ^ You can use the method described in Example 7 to determine the tensile and deloxation of the sample. And the hardness. The results are shown in Table 8. Shedding hardness 9.50 4.47 * 7.36 4.53 6.83 —------ _4.69 Yiba

Soft tissue products with lower amount of shedding ^ While the present invention is described in detail with specific embodiments, it should be understood by those skilled in the art_ Once you understand the foregoing, you can tap out these embodiments , Cross compound or equivalent. Therefore, the scope of the present invention will be evaluated by the additional patent application park and all equivalents thereof. Θ Continued page P K00 I -08I8-β 40 200300810 Brief description of the components in the diagram 1 first stock chest First raw material tank 2 stock pump Raw material pump 3 Dilution water 4 fan pump Fan pump 5 metering pump 量 会 浦 6 headbox front paper box 7 papermaking fabric papermaking organization 8 sunction box suction box 11 second stock chest second raw material tank 12 stock pump raw material pump 13 dilution water dilution water 14 fan pump fan pump 16 headbox front paper box 17 papermaking fabric papermaking organization 18 suction box suction box 19 roll roller 20 vaccum box empty box 22 felt felt 30 dryer dryer 31 pressure roll pressure roller 32 roll roller 41 layered headbox layered front head box 42 forming fabric forming tissue 43 forming roll 44 felt papermaking wool 8¾ 45 press roll 46 Yankee dryer Yankee dryer 47 creping doctor blade 110 creping doctor blade 110 papermaking headbox 111 newly-formed wet web 112 upper forming fabric 113 lower forming fabric Low forming structure 117 transfer fabric 119 through-drying fabric 121 through-dryer 140 through nozzle 140 spray nozzle Nozzle □ Continued (If the description page of the invention is insufficient, please note and use the continued page) PK001- 0818-Becky-20030220 -February 20, 2003 4 1

Claims (1)

200300810 Scope of Patent Application Continued, Patent Application Scope 1 · A method for forming tissue paper products, comprising: providing a liquid raw material of cellulose fiber; forming a multilayer wet fabric from the liquid raw material of cellulose fiber; A bonding agent to the raw material, the wet fabric or their composition; adding at least one latex having a glass-breaking transition temperature of less than 301 to the liquid raw material, the wet fabric or their composition, the addition of the latex In an amount less than 60 pounds per dry weight of cellulose fibers; and drying the wet fabric, wherein at least one outer layer of the dried fabric comprises the latex-treated cellulose fibers. 2. The method according to item 1 of the patent application park, wherein the glass transition temperature of the latex is greater than -25¾. 3. The method according to item 1 of the scope of patent application, wherein the latex has a glass transition temperature between -15¾ and 15 ° C. 4. The method according to item 1 of the scope of patent application, wherein the latex has a slope transition temperature between -1010 and 0 eC. 5. The method according to item 1 of the patent application park, wherein the latex is selected from the group consisting of phenethylfluorene-butadiene copolymer, polyethyleneacetate homophase polymer, ethylacetate · acetate B Fluorene copolymer, ethynyl-acetate acrylic copolymer, ethylene-vinyl chloride copolymer, ethylene-vinyl gaseous-vinyl acetate terpolymer, acrylic polyvinyl chloride polymer, acrylic polymer and A group of nitrous acid polymers. (3 continuation pages (please note and use continuation pages when the invention description page is insufficient) p κ 0 〇I-〇8 1 8-B ec ky-2 0 0 3 0 2 2 0 -February 20, 2003 42 200300810 Scope of Patent Application Continued 6. The method described in item 1 of the patent application park, wherein the added amount of the latex is 1 to 40 pieces per ton of cellulose fiber dry weight. The said square enamel, wherein the added amount of the latex is 1 mile per 20 tons of dry weight of cellulose fiber. 8 · The formula described in item 1 of the patent application scope, wherein the debonding agent is added in Before the latex. 9. The method as described in item 1 of the scope of patent application, further comprising adding a wet strength agent to the raw material, the wet fabric, or a combination thereof. I 0. As claimed in Patent Application Park No. 9 The method according to item 1, wherein the wet strength agent is added before the latex. II. The method according to item 9 of the scope of patent application, wherein the wet strength agent includes a temporary wet strength agent. 12. The scope of patent application The method of item π, wherein the temporary wet strength agent comprises a cationic polypropylene Ammonium polymer. 1 3. The square enamel according to item 11 of the patent application park, wherein the temporary wet strength agent is added in an amount of 1 to 60 pounds per cell dry weight of the cellulose fiber. 14 · as applied The method according to item 9 of the patent model, wherein the wet strength agent comprises a permanent wet strength agent. 1 5 · The square enamel according to the item 14 of the application for the patent model, wherein the permanent wet strength agent comprises a cationic polymer Ammonia polymer. 16. The method according to item 14 of the scope of the patent application, wherein the permanent wet strength agent is added in an amount of 1 to 20 pounds per ton of the cellulose fiber dry weight. The method described in the above item, wherein the debonding agent includes an imidazole called a quaternary compound. Ξ Continued on the next page PK001-0818-Bec (When the description page of the invention is insufficient, please note and use the continuation page) ^ 20030220 -February 20 , 2003 43 200300810 __ Patent application scope $ buy page 18. The method as described in item 1 of the patent application scope, wherein the debonding agent includes a monofunctional quaternary ammonium compound. 1 9. The method according to the item, wherein the debonding agent is added The amount is 1 to 30 pounds of dry weight of the cellulose fiber per ton. 20. The method according to item 1 of the scope of patent application, wherein more than 60% of the latex is left on the cellulose fiber. 2 1 · The square enamel according to item 1 of the patent application scope, wherein 75% to 90% of the latex remains on the cellulose fiber. 22. The method according to item 1 of the patent application scope, wherein the latex is Sprayed onto the wet fabric. 23. A method for forming a tissue product, comprising: providing a liquid raw material of cellulose fibers; forming a multilayer wet fabric from the liquid raw material of cellulose fibers; adding a debonding agent to the raw material, the wet fabric Or their composition, the debonding agent is added in an amount of 1 to 30 pounds per ton of dry weight of the cellulose fiber; a wet strength agent is added to the raw material, the wet fabric or their composition, the wet The strength agent is selected from the group consisting of temporary wet strength agent, permanent wet strength agent and their composition; adding at least one latex to the raw material, the wet fabric or their composition, and the addition amount of the latex is per ton The cellulose fiber has a dry weight of 1 to 40 pounds, the latex has a glass transition temperature of less than 300c and is greater than -25 ° C; and a dry 1¾ wet fabric, wherein at least one outer layer of the dry fabric contains the latex-treated fiber Plain fiber. [3 Continued pages P K00 1 -0818-Bec (When the description page of the invention is insufficient, ky-20030220 -February 20, 2003 Please note and use the continuation page) 44 200300810 Scope of Patent Application Continued 2 4 · If the scope of Patent Application The method according to item 23, wherein the latex has a glass transition temperature of -15¾ to 15. 〇between. 25. The method according to item 23 of the patent application park ', wherein the glass transition temperature of the latex is from -10¾ to 0. 〇between. 26. The method as described in item 23 of the scope of patent application, wherein the latex is selected from the group consisting of styrene-butadiene copolymer, polyvinyl acetate homopolymer, vinyl-acetic acid ethyl acetate copolymer, ethyl acetate Ammonium-acetate acrylic acid copolymer, acetamidine-vinyl gaseous copolymer, ethylene-vinyl gaseous-vinyl acetate terpolymer, acrylic polyvinyl chloride polymer, propionic acid polymer and nitrous acid Base ring made of polymer. 27. The method of claim 23, wherein the debonding agent is added before the latex. 28. The method of claim 23, wherein the wet strength agent is added before the latex. 29. The method according to item 23 of the scope of patent application, wherein more than 60% of the latex is retained on the cellulose fibers. 30. The method according to item 23 of the patent application park, wherein 75% to 90% of the latex remains on the cellulose fibers. 3 1. The method according to item 23 of the scope of patent application, wherein the latex is sprayed onto the wet fabric. 32. The method according to item 23 of the patent application park, wherein the latex is added in an amount of 1 to 20 pounds per ton of cellulose fiber dry weight. 33 · A tissue product having a basis weight of less than 80 grams per square meter. The tissue product includes a multilayer paper fabric having at least one defining tissue product. Continued page PK00I-0818-Bec (Invention When the instruction sheet is not enough, please note and use the continuation sheet) ky-2〇〇〇２〇220 -February 20, 2003 45 200300810 Scope of patent application: One of the outer surface of the purchase page, the outer layer is made of cellulose fiber Formed, the cellulose fiber is added with a debonding agent, a wet strength agent, and at least one latex. The latex has a glass transition temperature of less than 30 ° C and greater than -25¾, and the content of the latex is less than the dry weight of the outer layer. 3%. 34. The tissue paper product according to item 33 of the scope of patent application, wherein the latex content is 0.05% to 2% of the dry weight of the outer layer. 3 5. The tissue paper product according to item 33 of the patent application park, wherein the latex content is 0.05% to 1% of the dry weight of the outer layer. 36. The tissue paper product as described in item 33 of the patent scope of Shenyang, wherein the glass transition temperature of the latex is between -15 ° C and 15 ° C. 37. The tissue paper product according to item 33 of Shenyang Patent Fanyuan, wherein the glass transition temperature of the latex is between -10 and 0 IQ. 38. The tissue product according to item 33 of the application, wherein the other layers of the multilayered ester fabric are substantially free of the latex. 39 · —Graft paper, as defined in item 33 of the scope of patent application. 40. A kind of toilet paper, as defined in item 33 of the scope of patent application. 41. The toilet paper according to item 40 of the patent application park, wherein the wet strength agent is essentially composed of a temporary wet strength agent. 42. A paper towel 'is defined in accordance with item 33 of the scope of patent application. 43. A tissue product having a basis weight of less than 80 grams per square meter. The tissue product includes a multilayer paper fabric having at least one outer layer defining an outer surface of one of the tissue products. The outer layer is made of It is formed by cellulose fibers. The cellulose fibers are added with a debonding agent, a wet strength agent, and at least one latex. The glass transition temperature of the latex is less than 300c and greater than _25. -——___ The scope of patent application for continuation pages is less than 3% of tissue paper products. 44. The content of tissue paper according to item 43 of the scope of patent application is 0.05% to 2% of the dry weight of the outer layer. 45. The content of the tissue paper product as described in item 43 of the scope of patent application is 0.05% to 1% of the dry weight of the outer layer. 46. The glass transition temperature of tissue paper products described in item 43 of the scope of patent application is between -15¾ and 15¾. 47. The glass transition temperature of tissue paper products as described in item 43 of the scope of patent application is between -10. < 0 to 0. < 0. Where the latex where read latex where read latex where the latex [□ Continued pages (If the description page of the invention is insufficient, please note and use the continued pages) PK001-0818-Becky-20030220 -February 20, 2003 47