CN1391626A - Thick and smooth multi-ply tissue - Google Patents

Abstract

The present invention relates to a paper tissue, and in particular to facial tissue, and disposable handkerchiefs. Claimed and described is a paper tissue comprising at least two plies, characterised in that the paper tissue has a physiological surface smoothness parameter of less than 700 microns, preferably from 650 microns to 50 microns, more preferably from 650 microns to 300 microns and in combination has a caliper per ply of more than 0.09 mm, preferably from 0.09 mm to 0.5 mm, more preferably from 0.1 mm to 0.2 mm. In one preferred embodiment a three-ply tissue with embossed middle ply is provided. Further is a related process claimed and described.

Description

Abundant and smooth multi-layered tissue paper

Invention field

The present invention relates to tissue paper, particularly face tissue and disposable handkerchief.A kind of three layers of tissue paper with embossing intermediate layer are provided in a preferred embodiment.

Background of invention

Paper web or paper are referred to as tissue paper or tissue webs or paper sometimes, or are referred to as tissue paper here, in modern society extensive use are arranged.Described article are the commodity of a large amount of supplies as face tissue and toilet paper, and these article all are called tissue paper here.For a long time, people think that always the important physical characteristic of these products is its intensity and slide calliper rule thickness, its pliability and smoothness, its absorbability and its resistance to picking.Various research-and-development activitys concentrate on one of them that improve these characteristics under the not serious situation that influences other performance always, or concentrate on and improve two or three described characteristics simultaneously.

Pliability and smoothness are that the consumer holds a certain products, it is rubbed mutually with skin, or the user rub the sense of touch of being experienced in hand.This sense of touch is that the combination of some physical properties provides.Those skilled in the art it has been generally acknowledged that, one of prior physical property relevant with pliability and smoothness is the surface structure of the tissue paper of the described tissue paper product use of preparation, and its available physiology surface flatness (PSS) parameter characterizes better, as US 5,855,738 is described.The slide calliper rule thickness of thin-paged paper products also is very important for consumer's sense of touch.

Intensity is that product is kept physical integrity and tear-resistant under service condition, anti-broken and anti-ability of tearing up.

Absorbability is measuring of product the absorption liquid scale of construction, the particularly aqueous solution or aqueous dispersion ability.Total absorbability that the consumer feels is considered to usually: the tissue paper of given quality absorbs the total amount of liquid and the speed that given quality tissue paper absorbs liquid when saturated.

Resistance to picking is a fiber product, with and form the ability that bonds together when paper web comprises hygrometric state under service condition.In other words, resistance to picking is high more, paper web fall the hair tendency will be low more.

WO97/44528 discloses a kind of multi-layered tissue paper goods with high-absorbable.Embodiment 4 discloses a kind of goods, and one of them is figuratum to have between the layer of the no textured structure that is placed on two essentially no decorative patterns of certain textured structure relatively.

EP 0 264 676 discloses the preparation method that a kind of multi-layered tissue paper is opened.Embodiment 3 discloses three laminates that a kind of paper that forms by wet method is made, and wherein the internal layer paper web is to be 18g/m by weight ²Cruddy paper form, and outer paper web is to be 14g/m by weight ²The press polish paper handled form.With nozzle cellulose ether binder is coated on these layers, they are bonded together.

US 5,855, and 738 disclose a kind of method for preparing smooth tissue paper, and this method contains the press polish step.

Thick relatively disposable paper products, promptly paper handkerchief and face tissue are known.Procter ﹠amp for example; The Tempo that Gamble company sells ^TM, its slide calliper rule thickness is about 0.3mm.High slide calliper rule degree transmits the notion of high dry strength and high wet strength to the consumer.High wet strength is also referred to as wet burst strength, can prevent from especially to tear or break, and tear or break can cause the user hand by mucus or other humoral pollution.

Thicker disposable paper products also is known, generally as kitchen-towel, for example Procter ﹠amp; The Bounty that Gamble company sells ^TM, its slide calliper rule thickness is about 0.7mm, and wet burst strength is greater than 200g.Yet the slide calliper rule thickness of this kitchen-towel depends on that on sizable degree this embossing causes surface texturisation coarse in whole lip-deep embossing, and suitable smooth wipe surfaces can not be provided when blowing one's nose

The goods that other has the broken intensity of high humidity and generally has relative caliper are those products that adopt the Tad method to produce.But, on the paper machine of routine, there is not this Tad equipment, therefore preparing such equipment just means the sizable investment of needs.

In theory, the wet strength and the slide calliper rule thickness of goods can be increased, smooth outer surface can be kept thus by the number of plies being increased to 5,6 layers or more multi-layered (replace embossing etc.).But this method is very expensive, and will obtain stiff goods, therefore can destroy sense of touch.

Attempting providing very smooth when surperficial, the method with the tissue paper press polish is normally adopted in this area.But press polish means it is with slide calliper rule thickness and the compromise method (for example US 5,855, and 738 is described) of pliability for slickness all the time.

Consider prior art, still have the demand to thin-paged paper products here, particularly to the demand of face tissue, described goods are characterised in that:

-be combined with best intensity, i.e. wet burst strength, absorbability and resistance to picking

-sense of touch of desirable pliability, smoothness and thickness also is provided

-be that cost is effective for preparation, and preferably can on the paper machine of routine, prepare

-optional the skin-care function that provides

Summary of the invention

The present invention relates to a kind of tissue paper, particularly face tissue and disposable handkerchief.Claimed and tissue paper that be described contains two-layer at least; it is characterized in that physiology surface flatness parameter that tissue paper has is less than 700 microns; be preferably the 650-50 micron; more preferably 650 microns-300 microns; and every layer slide calliper rule thickness is greater than 0.09mm; be preferably 0.09mm-0.5mm, more preferably 0.1mm-0.2mm.In a preferred embodiment, a kind of three layers of tissue paper are provided with embossing intermediate layer.The invention still further relates to claimed and method that be described.Detailed Description Of The Invention

According to the present invention, cellulosic fibrous structure is to use well-known principle of field of papermaking and machine wet method shop to make.In the preparation method of tissue paper matrix, preferred suitable intermittent pulp proportioning contains basically the fiber (comprising for example artificial fibre, viscose) by cellulose fibre (being referred to as wood pulp fibre usually) or cellulose-derived.Attempt to use the fiber of deriving in the present invention from cork (gymnosperm or coniferous tree) and hardwood (angiosperm or deciduous tree).The specific seeds that fiber is derived are unessential.Can adopt any methods of beating easily to produce wood pulp fibre with local trees.Such as sulphite, the chemical method of sulfate (comprising kraft pulp) and soda process is suitable for.Mechanical means such as heat chemistry (or Asplund) method also is suitable for.In addition, also can use various half chemistry or half mechanical means.And the fiber of bleaching or non-bleaching is used in trial.Preferably do not use non-cellulosic fibre, for example the latex fiber.

Can contain wet strength chemical agent according to tissue paper of the present invention as preferred ingredient.In the weight of dried fiber, it is about 3.0% that wet strength chemical agent, for example water miscible content permanent and provisional wet-strength resins are up to, and preferably is at least 0.5%, more preferably at least 0.8% weight.

Be used for wet-strength resins of the present invention some classes can be arranged.For example, Westfelt is at CelluloseChemistry and Technology, and 13 volumes have been described many such materials, and their chemical is discussed in the 813-825 page or leaf (1979).

Usually, wet-strength resins is water miscible cationic materials.That is to say that described resin is water miscible in adding papermaking batching to the time.Probably in addition expectation be that in process subsequently, resin becomes water insoluble as described in will making as crosslinked action.And some resins are water miscible in the pH scope that limits for example only in certain conditions.It has been generally acknowledged that wet-strength resins is being deposited on the paper fibre, after being deposited in the fiber or being deposited between the fiber, will carry out crosslinked or other curing reaction.As long as have a large amount of water, can not carry out crosslinked usually or curing.

Useful especially is various polyamide-epichlorohydrin resins.These materials are to have for example low-molecular weight polymer of amino, epoxy radicals and oxetane groups of active function groups.Patent documentation has fully been described described preparation methods, and described patent comprises US-A-3 700 623 that was issued to Keim on October 24th, 1972 and the US-A-3 772 076 that was issued to Keim on November 13rd, 1973.

Useful especially in the present invention is Hercules Inc.of Wilmington, and the trade mark that Delaware sells is polyamide-epichlorohydrin resins of Kymene 557H and Kymene LX.These resins generally have description in the patent of aforesaid Keim.

Polyamide-the epichlorohydrin resins that is used for alkali activation of the present invention is by Monsanto Company of St.Louis, and Missouri sells, and trade mark is Santo Res, and for example Santo Re 31.The material of these types is described in the US-A-3 855 158 that on December 17th, 1974 was issued to Petrovich usually; Be issued to the US-A-3 899 388 of Petrovich on August 12nd, 1975; Be issued to the US-A-4 129 528 of Petrovich on December 12nd, 1978; Be issued to the US-A-4 147 586 of Petrovich on April 3rd, 1979; With the US-A-4 222 921 that was issued to Van Eenam on September 16th, 1980.

Being used for other water-soluble cationic resin of the present invention is polyacrylamide resin, American Cyanamid Company of Sandford for example, and Connecticut product sold, trade mark are Parez, for example Parez 631 NC.These materials are described in the US-A-3 556 932 that was issued to Coscia etc. on January 19th, 1971 usually; With the US-A-3 556 933 that was issued to Williams on January 19th, 1971.

The water-soluble resin that is used for other type of the present invention comprises acrylic emulsion and anion styrene-butadiene latex.Be issued to a large amount of example that the resin of these types is provided among the US-A-3 844 880 of Meisel Jr etc. on October 29th, 1974.Also having some to can be used for water-soluble cationic resin of the present invention is urea formaldehyde resin and melamine resin.These polyfunctional living polymers have several thousand molecular weight.More common functional group comprises nitrogenous group, for example amino and the methylol that is connected on the nitrogen.Although not too preferred, the polyethyleneimine: amine resins can be used for the present invention.

More complete explanation to aforementioned water-soluble resin, comprise its preparation method, can be referring to TAPPIMonograph Series No.29, Wet Strength in paper and Paperboard, TechnicalAssociation of the Pulp and Paper Industry (New York; 1965).

Also can choose wantonly and use temporary wet strength agent, for example modified starch.Can use the mixture of temporary transient and permanent wet strength agent.

The present invention can contain the dry strength chemical agent, and its consumption preferably is up to 3% weight in dry fiber weight, more preferably is at least 0.1% weight.Highly preferred dry strength chemical agent is a carboxymethyl cellulose.Other suitable dry strength chemical agent comprises: and polyacrylamide (for example by AmericanCyanamid of Wayne, the Cypro that N.J. produces ^TM514 and Accostrength ^TM711 combination), starch (for example cornstarch or farina); Polyvinyl alcohol (Air Products Inc.ofAllentown for example, the Airvol that PA produces ^TM540); Melon that natural gum or locust bean gum; And polyacrylic ester latex.Suitable starch material also can comprise the cationic starch of modification, for example modification becomes to have nitrogen-containing group as amino and the modified starch that is connected to the methylol groups on the nitrogen, they derive from National Starchand Chemical Company (Bridgewater, NJ).

Comprising the dissociate chemical softening composition of agent of chemistry is optional member of the present invention.The US-A-3 821 068 that authorized on June 28th, 1974 points out, can use the chemistry agent of dissociating to reduce hardness, and therefore increase the pliability of tissue webs.The US-A-3 554 862 that authorized on January 12nd, 1971 discloses the agent of dissociating of suitable chemistry.The agent of dissociating of these chemistry comprises quaternary ammonium salt.

Preferred chemical softening composition comprises the quaternary ammonium compound of about 0.01%-about 3.0%, preferred biodegradable quaternary ammonium compound; Polyol with about 0.01%-about 3.0%; Be preferably selected from glycerine, D-sorbite, mean molecule quantity is polyoxyethylene glycol and the polyoxypropylene diols of about 200-4000 for polyglycereol and the weight average molecular weight of about 150-about 800.The weight ratio of preferred quaternary ammonium compound and polyol is about 1.0: 0.1-0.1: 1.0.Have now found that, in being added into papermaking batching before, when polyol and quaternary ammonium compound are preferable at least 40 ℃ when mixing at first together, this chemical softening composition is more effective.In addition, perhaps can be, chemical softening composition can be applied on the tissue webs of substantially dry for what replace, for example by printing process carry out (annotate: except as otherwise noted, at these all percentages all in the weight of dried fiber).

The example that is applicable to quaternary ammonium compound of the present invention comprises the variant of the unmodified dialkyl dimethyl ammonium salt of knowing and alkyl trimethyl ammonium salt or its monoesters or diester.Example comprises the diester variations of diester variations and two (hydrogenated tallow) alkyl dimethyl ammonium chloride of two (hydrogenated tallow) dimethyl methyl ammonium sulfate.Be not bound by theory, it is believed that ester moiety gives these compounds with biological degradability.The commercially available material can derive from Witco Chemical Company Inc.of Dublin, Ohio, and commodity are called RewoquatV3512.The details of analysis and method of testing is disclosed among the W095/11343 that publishes April 27 nineteen ninety-five.

The example that is used for polyol of the present invention comprises: weight average molecular weight particularly preferably is PEG-400 for the polyoxyethylene glycol of about 200-about 600.

Tissue paper of the present invention can prepare by the common method that those of ordinary skills know, and for example utilizes as one or more felt and/or making paper web dewater suitable paper pulp and prepare.For the present invention, Chang Gui papermaking process is preferred.Here the method for any routine of being referred to is meant the papermaking process that does not comprise the Tad step.Perhaps, can use the papermaking process that comprises the Tad step.After this these class methods of describing in patent documentation of mentioning are relevant with the Tad tissue paper.

Tissue paper according to the present invention has at least 2 layers, it is abundant and smooth, therefore its physiology surface flatness parameter that has is less than 700 microns, be preferably the 650-50 micron, more preferably 650 microns-300 microns, and every layer slide calliper rule thickness is preferably 0.09mm-0.5mm, more preferably 0.1mm-0.2mm greater than 0.09mm.According to the present invention, have now found that, be each synusia when having great slide calliper rule thickness in statement with cost effective manner, every layer of slide calliper rule thickness is a relevant parameter.Any combination of the PSS parameter that provides above and the scope of every layer of slide calliper rule thickness is within the scope of the present invention.

Preferred tissue paper has the ratio of low every layer of slide calliper rule thickness and PSS parameter, and this ratio is lower than 6500 microns/mm, more preferably less than 5000 microns/mm, more more preferably less than 3000 microns/mm.

Tissue paper according to the present invention has first and second surfaces, and place relative to one another on these surfaces, and thickness is vertical with first and second surfaces.This thickness is also referred to as the slide calliper rule thickness of tissue paper.

Slide calliper rule thickness according to tissue paper of the present invention is preferably 0.1mm-1mm, more preferably 0.2mm-0.5mm.

And, preferably have wet burst strength according to tissue paper of the present invention greater than 100g, be preferably 150g-500g, more preferably 250g-400g.

In a preferred embodiment of the invention, the tissue webs that provides is made of two-layer.In a preferred two-layer embodiment of the present invention, one deck is made of the press polish tissue paper, and another layer is by textured tissue paper, and preferred embossing tissue paper constitutes.Do not wish to be bound by theory, but it is believed that: embossing has increased the whole slide calliper rule thickness of product, has therefore also increased every layer of slide calliper rule thickness.Press polish increases the smoothness of each layer usually, and therefore the surface that obtains has low PSS parameter.

" press polish " used herein comprises the high pressure press polish, and the high pressure press polish is meant the press polish of using pressure/contact length of 3kN/m at least to carry out, more preferably 5kN/m-50kN/m, more more preferably 10kN/m-25kN/m.Use the press polish of high pressure to increase the smoothness of tissue paper, so reduced the PSS parameter.

According to the present invention, preferably individual layer is carried out press polish, but also can carry out press polish simultaneously or to whole multi-layered tissue paper which floor.

Perhaps adopt other technology known in the art to increase the smoothness of tissue paper, for example select suitable fourdrinier machine silk screen, felt and belt in the water smoking, and further (binder content under appropriate condition, adhesive is formed, and the blade angle of attack is wrinkling auxiliary) wrinkling.For example use the further surface treatment of back, also within the scope of the invention with disclosed washing lotion (lotion).

" textured " used herein, be meant that for tissue paper tissue paper is through Tad, or integral embossed, or comprise the zone of different basic weights, or have weavy grain after the drying, or under appropraite condition (binder content, adhesive is formed, the blade angle of attack, wrinkling auxiliary) wrinkling, as hereinafter described.

" integral embossed " used herein is meant with the slide calliper rule thickness of tissue paper before the integral embossed and compares that embossing can make the slide calliper rule thickness of tissue paper increase by 5% at least, and be preferred 15%, more preferably 25%.Preferred integral embossed provides the pattern of embossing and the zone of embossing not, its in a procedure of processing only to multi-layered tissue paper of the present invention in the limited number of plies work, preferably in a procedure of processing, only one deck is worked.The outmost embossed area of preferred pattern surpasses 75% of embossing ply of paper total surface area at least, and is preferred 85%, and more preferably 95%.Protruding button is well-known in the art to protruding button embossing, and as being issued to the United States Patent (USP) 3,414 of the common transfer of Wells December 3 nineteen sixty-eight, 459 is described.Also can adopt the nested embossed tissue paper weavy grain of giving, as being issued to the United States Patent (USP) 4,320,162 of Schulz etc. May 16 nineteen eighty-two.Perhaps, can adopt double-deck stacked embossing to give the tissue paper weavy grain, be issued to the United States Patent (USP) 5,468,323 of the common transfer of McNeil as November 21 nineteen ninety-five.Preferred this integral embossed adopts steel to steel, protruding button that protruding button embossing is provided, and this protruding button preferably has the ellipse cross section, and highly is 0.5mm-3mm, more preferably 1mm-2mm.The embossing area that preferred integral embossed provides is 1 with the ratio of embossing area not: 1-1: 20, more preferably 1: 2-1: 15, more more preferably 1: 5-1: 10.

For the one or both sides of appointing first and second apparent surfaces obtain weavy grain, can select this tissue paper is carried out Tad.Tad is disclosed in the United States Patent (USP) of following common transfer: be issued to the US 4,529,480 of Trokhan on July 16th, 1985; Be issued to the US 4,637,859 of Trokhan on January 20th, 1987; Be issued to the US5 of Smurkoski etc. on November 15th, 1994,364,504; Be issued to the US 5,529,664 of Trokhan etc. on June 25th, 1996; Be issued to the US 5,679,222 of Rasch etc. on October 21st, 1997; Be issued to the US5 of Ayers etc. on February 3rd, 1998,714,041; Be issued to the US 5,906,710 of Trokhan etc. on May 25th, 1999.Perhaps, tissue paper can make through Tad and by the method for following patent disclosure: be issued to the US 5,429,686 of Chiu etc. July 4 nineteen ninety-five and be issued to the US5 of Wendt etc. on September 30th, 1997,672,248.

Perhaps, tissue paper can by provide different basic weights various zones produce weavy grain, so there is many-basic weight tissue paper.Many-basic weight tissue paper is disclosed in the United States Patent (USP) of following common transfer: the US 5,245,025 that was issued to Trokhan etc. on September 14th, 1993; Be issued to the US 5,527,428 of Trokhan etc. on June 18th, 1996; Be issued to the US5 of Trokhan etc. on July 9th, 1996,534,326; Be issued to the US 5,654,076 of Trokhan etc. on August 5th, 1997; Be issued to the US 5,820,730 of Phan etc. on October 13rd, 1998; Be issued to the US5 of Phan etc. on January 11st, 1994,277,761; Be issued to the US 5,443,691 of Phan etc. August 22 nineteen ninety-five; Be issued to the US 5,804,036 of Phan etc. on September 8th, 1998; Be issued to the US5 of Trokhan etc. on April 2nd, 1996,503,715; Be issued to the US 5,614,061 of Phan etc. on March 25th, 1997; Be issued to the US 5,804,281 of Phan etc. on September 8th, 1998; With the US 5,900,122 that was issued to Huston on May 4th, 1999.

Perhaps, for example according to the United States Patent (USP) of following common transfer, can obtain having the paper of weavy grain by conventional drying: be issued to the US 5,549,790 of Phan on August 27th, 1996; Be issued to the US 5,556,509 of Trokhan etc. on September 17th, 1996; Be issued to the US5 of Ampulski etc. on December 3rd, 1996,580,423; Be issued to the US 5,609,725 of Phan on March 11st, 1997; Be issued to the US 5,629,052 of Trokhan etc. on May 13rd, 1997; Be issued to the US5 of Ampulski etc. on June 10th, 1997,637,194; Be issued to the US 5,674,663 of McFarland etc. on October 7th, 1997; Be issued to 5,693,187 of Ampulski etc. on December 2nd, 1997; Be issued to the US5 of Trokhan etc. on January 20th, 1998,709,775; Be issued to the US 5,776,307 of Ampulski etc. on July 7th, 1998; Be issued to the US 5,795,440 of Amputski etc. on August 18th, 1998; Be issued to the US5 of Phan, 814,190 on September 29th, 1998; Be issued to the US 5,817,377 of Trokhan etc. on October 6th, 1998; Be issued to the US 5,846,379 of Ampulski etc. on December 8th, 1998; Be issued to the US5 of Amputski etc. on January 5th, 1999,855,739; Be issued to the US 5,861,082 of Ampulski etc. on January 19th, 1999; Be issued to the US 5,871,887 of Trokhan etc. on February 16th, 1999; Be issued to the US5 of Ampulski etc. on April 27th, 1999,897,745; With the US 5,904,811 that was issued to Ampulski etc. on May 18th, 1999.

In highly preferred embodiment of the present invention, a kind of tissue paper constitutes by three layers.Preferred one deck at least is press polish, and one deck is textured at least, preferably embossing.More preferably two-layer is press polish, and embossed layers preferably places between them.The advantage of this specific embodiment is: provide smooth surface two towards the user.Alternate embodiment of the present invention is that for example those have the tissue paper of any amount weavy grain layer, and preferably each embossed layers places between the press polish layer of two outsides, and one of them is that two embossed layers place four layers of tissue paper between two press polish layers.

When the two-layer or multiple layer combination of tissue paper formed tissue paper, these layers can be randomly link together with the mode of for example gummed or embossing, are called " connection embossing " here.Because gummed tends to make product hardening and not soft, not preferred therefore.

" connection embossing " used herein be meant in a procedure of processing, according to all embossed a kind of embossing in a processing step of all layers of multi-layered tissue paper of the present invention.Preferred connection embossing can or can not influence the smoothness of any press polish layer substantially largely.Therefore, preferably on the overwhelming majority of tissue paper surf zone, preferably on first and second surfaces, tissue paper has the surface of not embossing.As this is employed, this means that tissue paper has one or more zones of connecting embossing and randomly of not comprising, one or more zones that connect embossing that comprise, and do not contain the zone that connects embossing and be at least 50% of tissue paper surface area, be up to 99%.Modally be to comprise the zone that connects embossing near the edge of tissue paper (for example along both sides or four limits); And comprise the zone that connects embossing and also can be used for decorative purpose (for example produce a kind of pattern or be used for outstanding logo or brand name).Not comprising the zone that connects embossing is comprising between the zone that connects embossing and/or the continuum around it.Connect embossing preferably by needle point being carried out embossing with steel to steel, needle point.

If use adhesive to come each layer of bonding multiple tissue paper,, preferably adhesive be coated in unevenly the surface of each layer that will bond according to the present invention.Therefore, preferably do not adopt to apply,, the specific region of tissue paper is selected less than preferential, even when applying adhesive forms discontinuous network because such nozzle applying adhesive is equably as the nozzle mode.

A kind of textured, preferably the tissue paper with embossing contains bossing.In a preferred embodiment of the invention, only apply adhesive to those bossings of tissue paper.Because these bossings are mainly related with adjacent layer, particularly related with adjacent press polish layer, applying adhesive to these bossings is enough to guarantee adhesiveness well, but will avoid using too much amount of binder, because it makes the tissue paper hardening easily.

Is to adopt roll printing to come applying adhesive with adhesive coated to a preferable methods on the tissue paper layer.Perhaps available melt-blown method applying adhesive is to form preferred adhesive the area of application, i.e. adhesive tape.

Can randomly further handle tissue paper with washing lotion, and the one or both sides of preferred process tissue paper, the two sides of most preferably handling tissue paper.Washing lotion can work to the smoothness of tissue paper, therefore can reduce its PSS parameter.

Washing lotion can contain softness/remover, emollient, fixative and composition thereof.Suitable softness/remover comprises quaternary ammonium compound, polysiloxanes and composition thereof.Suitable emollients comprises propylene glycol, glycerine, and triethylene glycol, spermaceti or other wax, vaseline has aliphatic acid, fatty alcohol and the fatty alcohol ether of 12-28 carbon atom in its fatty acid chain, and composition thereof.Suitable fixative comprises mulit-hydroxy fatty acid ester, polyhydroxy fatty acid amide and composition thereof.Other optional component comprises spices, antibacterial activity thing, antiviral activity thing, disinfectant, pharmaceutical actives, film forming agent, deodorant, opacifier, astringent, solvent etc.The specific examples of washing lotion component comprises camphor, thymol and menthol.

The tissue paper that the method according to this invention can utilize any method known in the art to make, preferred method disclosed herein.

This method comprises through the following steps: expansion is two-layer at least from corresponding patent roller number, and optimum selecting three-layer provides tissue paper.This method also comprises the following steps: to provide to one deck at least the pattern of band weavy grain, preferably adopts integral embossed technology disclosed herein.This method also is included in the step that one deck at least carries out the high pressure press polish, employing be press polish pressure as disclosed here.Further, this method comprises described each layer and puts the step that forms multi-layered tissue paper.

Preferred method comprises also washing lotion is coated onto step on the layer that described layer forms the skin of multi-layered tissue paper, most preferably, washing lotion only is coated onto on the surface that forms the multi-layered tissue paper outer surface.In addition, preferable methods comprises the step that connects each and put layer by embossing, and described embossing is meant aforesaid connection embossing.Randomly, this method also can comprise the applying step of adhesive, preferably only is coated onto the bossing on the layer of being with weavy grain. Method of testing

The slide calliper rule thickness of paperMeasure according to follow procedure: before carrying out the slide calliper rule thickness measurement, tissue paper preliminary treatment 2 hours under the relative humidity condition of 21-24 ℃ and 48-52%.If measure the slide calliper rule thickness of toilet paper, at first tear and discard 15-20 and open paper.If measure the slide calliper rule thickness of face tissue, from place sampling near package centre.Select sample, and then regulate 15 minutes.

The slide calliper rule thickness of multi-layered tissue paper as used herein is to bear 14.7g/cm when tissue paper ²Thickness during compressive load.Preferably, (the 89-11 type available from Thwing-Albert Instrument Company of Philadelphia, Pa) is measured slide calliper rule thickness to use underload Thwing-Albert micrometer.The slide calliper rule thickness of every layer of paper is the total slide calliper rule thickness divided by the multi-layered tissue paper of the contained number of plies.Every layer of slide calliper rule thickness and slide calliper rule thickness for the individual layer tissue paper equate.If possible, should avoid the decorative zones of tissue paper, perforation, edge effect etc.

Utilize electronics tester and the following test condition test of breaking Wet burst strengthThe tester that breaks is the Thwing-Albert tester Cat.No.177 that breaks that 2000 gram load cells are housed.The described tester that breaks is that (Philadelphia, PA 19154, USA) provide by ThwingAlbert Instrument Company.

Get 8 tissue papers, and two a pair of stacked with it.Use the scissor cut sample, they are cut into about 228mm (vertically) * 114mm (laterally), the thickness of each sample is the twice of finished product.

With little folder sample is piled up and to connect together, and the other end " pectinid " that sample is piled up and make paper separately, air is circulated betwixt, thereby make sample carry out 1-2 hour aging.By anchor clamps each sample is stacked on and hangs 5 minutes (± 10 seconds) in the forced air draft oven of 107 ℃ (± 3 ℃).After heating cycle, from stove, take out sample and pile up, and minimum cooling 3 minutes before test.

Get a sample bar, hold the narrow transverse edge of sample bar, the center of sample is immersed be equipped with in the dish of about 25 millimeters distilled water.Make sample in water, stop four (4 ± 0.5) second.Take out sample and hold sample drainage three (3 ± 0.5) second, so that water is from laterally pouring off.After drainage, test immediately.Wet sample is placed on the following ring of sample fixing device, the outer surface that makes product up so that the wet end of sample divides the open surfaces that covers the sample retainer ring fully.If shrinkage is arranged, then abandon sample and also test again with new sample.After under sample suitably places, encircling, open and reduce the switch of going up ring.Like this, sample to be tested is clipped in the sample fixed mechanism now firmly.By pushing start button, begin the test of breaking immediately in this position.Piston will begin to raise.When sample tears or break, the record full-scale reading.Piston will be back to its original position automatically.Other three samples are repeated this method, therefore carried out test, i.e. four replicate tests altogether four times.Mean value report test result with four replicate tests is accurate to gram.

For the mensuration of the physiology surface flatness of reporting the PSS parameter, select the tissue paper sample that does not have wrinkle, crack, perforation or depart from macroscopical monoplane property too greatly.Before measuring, with tissue paper conditioning at least 2 hours under the relative humidity condition of 22-24 ℃ and 48-52%.This sample placed on the electronic platform and suitably carry out magnetic protection.Can select any surface is measured, but all records must derive from same surface.

Obtain Z to the function of displacement by scan the tissue paper sample in any direction with profilograph, obtain the physiology surface flatness as distance.By Fourier transformation Z is converted into the spectrogram of amplitude to frequency to displacement.Use a series of wave filters to adjust this spectrogram then to be suitable for the human body haptic response.Amount to the peak height through the amplitude frequency curve of filtering of 0-10 circulation/millimeter, provide the result.

The size of tissue paper sample is about 100 millimeters * 100 millimeters, and is installed on the electric platforms.Though any suitable platform can meet the demands, but found that following two kinds of platforms are suitable:, perhaps in the closed-loop control model, use the small-sized accurate platform of CP3-22-01 DCl of NuStep 2C NuLogic diaxon stepping motor controller available from the platform that has surperficial detection model KES-FB-4NKES-SE of Japanese Kato Tech Company Limited of Koyota.This platform tool has the constant speed drive motors, and it is with the speed running of 1 mm/second.In 30 millimeters in the forward scan sample of 1 millimeter of horizontal indication, be reversed then.Collect data for 26 millimeters from forward and oppositely.Ignore each scanning initial and last 2 millimeters, and in calculating, do not adopt.

It is 2.54 microns probe that profilograph has needle type radius, and its active force is 0.20 gram.Whole Z of 3.5 millimeters are calibrated the scale scope to displacement.After the process scanning distance of sample, profilograph is experienced the Z of recording pen to displacement in the millimeter scope.From the speed digitlization of the output voltage of scale controller with at least 20 of per seconds.Through after the whole 26 millimeters sweep limits, obtain 512 pairs of times surface altitude information points for forward that scans and reverse both direction.Profilograph is installed on the above-mentioned example platform, can measure surface appearance.Suitable profilograph is EMD 4320 W1Vertical Displacement Transducer, and it has an EPT 010409 record nib and EAS 2351 analogue amplifiers.This equipment derives from Federal Products of Providence, RhodeIsland.

With digitized data to being input in the standard statistical analysis bag further to analyze.Suitable software analysis bag comprises SAS of Cay (North Carolina), and preferably controls software 3.1 available from the LabVIEW instrument of NationalInstruments of Austin (Texas).When using LabVIEW software, apparent height of each scanning of contact and the initial data of time are to being to accumulate in around the mean value that the Mean.vi analysis tool of using LabVIEW software obtains.Use amplitude and spectrogram .vi analysis tool mutually, will be converted into 16 Zhang Zhen's width of cloth spectrograms from 512 data points that scan each time for 16 times.Use level and smooth each spectrogram of the described method of PROC spectrogram method of SAS software then.Use following LabVIEW smoothing filter value: 0.000246,0.000485,0.00756,0.062997,0.00756,0.000485,0.000246.The output valve of getting this instrument as amplitude spectrum value (AmpSpectrum Mag) (vrms).

Use a series of frequency filters to regulate amplitude data then to be suitable for the human body haptic response, described frequency filter is according to designing as the vibration frequency function in the listed Verrillo data with vibrations sense of touch threshold value of following document, described document is Journal of Acoustical Society of America, article title is " Effect Of Contactor Area On The Vibrotactile Threshold ", 35 volumes, 1962 (1963).Aforementioned data is to report with the time domain of cycles/sec, and be converted to the cycle/spatial domain of millimeter.At 1991 International Paper Physics Conference, TAPPI Book1, more specifically be in the 19 page listed programs of title of Ampulski etc., can find transformation ratio and filter value for the article of " Methods For The Measurement OfThe Mechanical Properties Of Paper tissue ", the specific program that uses is listed in 22 pages, and title is " PhysiologicalSurface Smoothness ".Response from wave filter is set at 0, and this response is lower than minimum threshold and is higher than the peak response frequency, and changes between 0-1, and the article of Ampulski etc. is described as described above.

Be multiplied by with suitable filter value and state amplitude spectrum and just obtain the frequency and amplitude data that physiology is regulated in each frequency.Typical amplitude spectrum and filtered amplitude spectrum are shown among Fig. 5 of article of aforementioned Ampulski etc.The frequency and amplitude curve that Verrillo regulated be with 0-10 the cycle/the point of some total between the millimeter.Its summation is considered to the physiology surface flatness.8 forwards and 8 reverse physiology surface flatness values that on average so obtain then, and report with micron.

The physiology surface flatness assay method that uses SAS software has been described: be issued to the U.S.P 4,959,125 of Spendel September 25 nineteen ninety in the United States Patent (USP) of following common transfer; Be issued to the U.S.P 5,059,282 of Ampulski etc. on October 22nd, 1991; Be issued to the U.S.P 5,855,738 of Weisrnan etc. on January 5th, 1999 and be issued to the U.S.P5 of Weisman etc. on November 9th, 1999,980,691.

Can select any one side of tissue paper to carry out the mensuration of smoothness, prerequisite is that all records derive from same surface.If any one side of tissue paper satisfies listed any smoothness standard herein, then think whole this standard of tissue paper samples met.Above-mentioned standard is all satisfied on the two sides of preferred tissue paper.

Embodiment

Preparation contains the aqueous slurry of 3% weight north needlebush sulfate (NSK) fiber in the pulper of routine.Gently the NSK slurries are made with extra care and with the ratio of dried total weight of fiber 0.9% with 2% permanent wet strength resin (Kymene ^TM617) solution adds in the NSK slurry pipe.Strengthen the absorption of permanent wet strength resin on the NSK fiber by blender in the pipeline.Before mixing pump, in the NSK slurries, add 1% dry strength resin (carboxymethyl cellulose) with the ratio of dried total weight of fiber 0.14%.At the mixing pump place with the concentration of NSK slurry dilution to about 0.2%.

Preparation comprises the chemical softening composition that two sclerosis tallow diethyl ester dimethyl chlorination quaternary ammoniums and mean molecule quantities are 400 polyethylene glycol (PEG-400).PEG-400 is heated to about 66 ℃, and quaternary ammonium compound is dissolved among the PEG-400 of fusion, to form uniform mixture.

Preparation contains the aqueous slurry of 3% weight eucalyptus fibers in the pulper of routine.Ratio with dried total weight of fiber 0.09% is starched the chemical softening composition solution of adding 1% in the pipe to eucalyptus.At the mixing pump place with the concentration of eucalyptus slurry dilution to about 0.2%.After CMC adds with at the mixing pump place with slurry dilution to about 0.2% the concentration, the also chemical softening composition solution of adding 1% in the NSK slurries.

Two kinds of slurries are mixed, and the ratio that makes NSK fiber and eucalyptus fibers is 40: 60, and by the individual layer flow box slurries that obtain is deposited on the fourdrinier wire, forms the paper embryo.Dewater by fourdrinier wire and under the help of water fender and vacuum tank.

At the transfer position place, be that about 20% paper embryo is passed on the conventional dry felt by fourdrinier wire with fibre concentration.Utilize the creping adhesives of the spray that comprises 0.25% polyvinyl alcohol (PVA) aqueous solution then, paper web is adhered on the surface of raising the gram drying cylinder.

Utilize scraper make paper web carry out drying wrinkling before, fibre concentration is increased to about 96%.Described scraper has about 25 ℃ oblique angle, and is provided with respect to raising the gram drying cylinder, so that about 81 ° angle of shock is provided.Raise the gram drying cylinder with the speed operation of about 4m/s, and make dry uncalendered paper on reel, be rolled into 1-layer paper roll.

Get three such 1-layer paper rolls and carry out off-line recoil operation to form 3-layer paper roll, it is converted into 3-layer thin-paged paper products subsequently, and its overall size is about 210mm ²

3-layer paper roll is like this preparation: 3 the 1-layer paper rolls of reeling simultaneously obtain, and make central core carry out the operation of steel integral embossed by rubber, and with two not the skin of embossing and the central core of embossing reel again together, form the three-ply paper volume.The smooth rubber roller that is used for the central core embossing is installed with respect to patterned steel rider.Patterned steel rider has the protruding button of ellipse embossing of the projection that highly is about 1.7mm, and it has the major axis of about 2mm and the minor axis of about 1mm on the surface.Embossing is to arrange with the concentric argyle design that repeats, and wherein said concentric rhombus is at 900mm ²Area on constitute by about 72 protruding buttons.

Subsequently 3-layer coil paper is converted to 3-layer thin-paged paper products.Launch the three-ply paper width of cloth and before folding, carry out the embossing step.According to the method for describing among the W095/27429 that publishes October 19 nineteen ninety-five, the edge that will be from the edge extends the thin-paged paper products of about 15mm to the center carries out embossing.The major part on thin-paged paper products surface (promptly at the intramarginal all surface of 15mm) is not embossed.This tissue paper also can be by decorating than impressing trade name on the zonule of embossing not formerly, and formerly not the zone of embossing also can add four kinds of ornamental blade patterns.

Before folding, can washing lotion be printed on each outer surface of 3-layer paper web by two step coated techniques.This washing lotion is the aqueous solution of two sclerosis tallow diethyl ester dimethyl chlorination quaternary ammoniums.This printing is by 3-layer paper web finished by two continuous printing equipments, and wherein each printing equipment is to hold the paper bottom roller by the anilox roller of a pair of rag and rubber to constitute.

It is about 3ml that this anilox roller is engraved as every square metre cell volume, and can provide washing lotion to fill the engraving volume with washing lotion from the airtight supply room of design.Gap between anilox roller and the rubber bottom roller is set at 0.35mm, and 3-layer paper web is transferred to washing lotion on the surface of contact anilox roller by this gap.Make this paper web by second printing equipment then, it is that reticulate pattern ink transfer/rubber rollers of 0.35mm is right that this equipment has same gap.Arrange that reticulate pattern ink transfer/rubber rollers is right, make second anilox roller contact the surface that also is not stained with washing lotion, and washing lotion is transferred on this surface.For the dry weight of final 3-layer tissue paper, the active quaternary of this layout transferable 0.45%.

The tissue paper that obtains by said method quantitatively be 54 grams/square metre, total slide calliper rule thickness is 0.35 millimeter, every layer of slide calliper rule thickness is 0.12 millimeter, wet burst strength is 375 grams, the PSS parameter is 620 microns.

Second sample is that the matrix by above-mentioned preparation constitutes, and its ectomesoderm passes smooth press polish axle.And find that carrying out press polish under 12kN/m-15kN/m can further be reduced to the PSS parameter about 500-450 micron.

Claims (20)

1. tissue paper, described tissue paper comprises two-layer at least, described tissue paper has slide calliper rule thickness and every layer of slide calliper rule thickness, described tissue paper also has physiology surface flatness parameter, it is characterized in that, described physiology surface flatness parameter is lower than 700 microns, and described every layer of slide calliper rule thickness is greater than 0.09 millimeter.

2. the tissue paper according to claim 1 is characterised in that, described physiology surface flatness parameter is 650 microns-100 microns.

3. the tissue paper according to aforementioned any claim is characterised in that, described every layer of slide calliper rule thickness is 0.1 millimeter-0.2 millimeter.

4. the tissue paper according to aforementioned any claim is characterised in that, the ratio of described physiology surface flatness parameter and described every layer of slide calliper rule thickness is lower than 5000 microns/millimeter.

5. tissue paper according to aforementioned any claim, described tissue paper has wet burst strength, it is characterized in that, and described wet burst strength is 150 grams-500 grams.

6. tissue paper according to aforementioned any claim, described tissue paper has wet burst strength, it is characterized in that, and described wet burst strength is 250 grams-400 grams.

7. the tissue paper according to aforementioned any claim is characterised in that, it does not comprise the paper through Tad.

8. the tissue paper according to aforementioned any claim is characterised in that, the one deck at least in the described multilayer contains integral embossed, and the one deck at least in the described multilayer does not contain integral embossed.

9. a tissue paper according to Claim 8 is characterised in that, described one deck at least that does not contain described integral embossed is press polish.

10. the tissue paper according to aforementioned any claim is characterised in that, described tissue paper comprises at least three layers.

11. the tissue paper according to claim 10 comprises two skins and at least one internal layer, it is characterized in that described skin does not contain described integral embossed, and at least one described internal layer contains described integral embossed.

12. the tissue paper according to claim 11 is characterised in that, at least one described skin is press polish.

13. the tissue paper according to aforementioned any claim is characterised in that, described integral embossed is that the zone by the pattern of embossing and not embossing provides, and it is characterized in that the ratio of described embossing area and described not embossing area is 1: 1-1: 20.

14. the tissue paper according to aforementioned any claim is characterised in that one deck contains a kind of washing lotion at least.

15. the tissue paper according to aforementioned any claim is characterised in that, described multilayer does not adopt adhesive to connect.

16. the tissue paper according to aforementioned any claim is characterised in that described multilayer connects by embossing.

17. a method for preparing according to the tissue paper of aforementioned any claim comprises the following steps:

-expansion is two-layer at least from female roller, optimum selecting three-layer,

-provide weavy grain to one deck at least, preferred embossed pattern,

-carry out the high pressure press polish at one deck at least,

-with described layer and put the formation multi-layered tissue paper.

18. the method according to claim 15, it also comprises washing lotion is coated to step on one deck at least of described press polish layer.

19. the method according to aforementioned any claim, it also comprises the step that all described layers are carried out embossing.

20. the method according to aforementioned any claim, it comprises the step of coming coating adhesive with roll printing.