KR100919463B1 - Composition and its use in papermaking - Google Patents

Abstract

The present invention relates to compositions used to enhance the softness in paper products. The composition comprises (i) an oil, a lipid or a wax (ii) at least one non-ionic surfactant (iii) at least one anionic compound selected from anionic microparticles and anionic surfactants (iv) cationic, non At least one polymer that is ionic or amphoteric, wherein the non-ionic surfactant is added in an amount of about 60 to about 1000 parts by weight per 100 parts by weight of the polymer. The present invention also relates to a method of making paper comprising the step of adding the composition to a cellulosic suspension or a wet or dry paper web.

Description

COMPOSITION AND ITS USE IN PAPERMAKING}

The present invention relates to compositions used to enhance softness in paper products. The invention also relates to a papermaking process in which the composition is added to a cellulose suspension or treated on a wet or dry paper web. The composition may be oil, wax or fat; At least one cationic, amphoteric or non-ionic polymer; Anionic compounds selected from anionic surfactants and anionic microparticles; And one or more non-ionic surfactants.

Background

Paper webs or sheets, commonly referred to as tissue or paper tissue webs, are commonly used as paper towels, napkins, facials and toilet tissues. Important properties for these papers are softness, absorbency, and strength. We are continuing to work on improving each of these characteristics without seriously affecting other characteristics.

Usually pressurized leaf paper and methods of making such paper are well known to those skilled in the art. Such papers are typically made by draining and shaping cellulose suspensions on a wire. Cellulose suspensions are typically contained in the headbox prior to being precipitated on the pneumatic wire to form a paper web. The paper web is then dewatered typically by vacuum dehydration and further dried by a press operation, where the web is subjected to pressure developed by replacing mechanical members such as, for example, cylindrical rolls or expanded nip presses. The dewatered web is then further pressurized and dried by a Yankee cylinder with steam drum apparatus known in the art.

Traditional fluff and methods for making such papers are known in the art. Such paper is typically made by making a paper sheet on a pourdrier wire and subsequently pressing the paper sheet with a package or roll to dry it. The dry paper is then defiberized using a hammer mill or pin defiberizer to form fluff. Typical products made from fluff are diapers and feminine hygiene products. Fluff may also be used to make air laid paper products.

Softness is the touch perceived by the consumer when grabbing a special product, rubbing the skin or wrinkling in the hand. The softness of the sheet can be achieved by mechanical means. For example, the sheet may be calendered to flatten the ridges formed when pleating the sheet. The sheet can also be rubbed to remove roughness. However, these approaches are often insufficient.

One way to make softer papers is to add softening compounds to the cellulose suspension. Softening compounds interfere with the natural fiber-to-fiber bonds that occur during sheet formation in the papermaking process. This reduction in bonding results in softer or rougher paper sheets.

WO 98/07927 describes the preparation of soft absorbent paper products using softeners. Softeners include quaternary ammonium surfactants, non-ionic surfactants, and strength additives. Softeners are added to the cellulose suspension before the paper web is formed. The softening compounds may also be treated on dry or wet paper webs, for example by spraying. If the paper web is dry, softening compounds may also be printed on the paper.

US 5,389,204 describes a process for producing soft lamination paper using a functional-polysiloxane softener. Emollients include functional-polysiloxanes, emulsifier surfactants, and surfactants that are noncationic. The softener is delivered to the dry paper web through the heater delivery surface. The softener is then pressed onto the dry paper web.

WO 97/30217 describes a composition used as a lotion to increase the softness of an absorbent paper. The composition comprises an emollient which is preferably a fatty alcohol or a wax ester. The composition also includes a quaternary ammonium surfactant and one or more non-ionic or amphoteric emulsifiers.

Most softening compounds added to the cellulose suspension or added to the paper web contain quaternary ammonium surfactants. Since manufacturers and consumers have experienced growing environmental considerations, quaternary ammonium surfactants are not always acceptable. Quaternary ammonium surfactants are generally toxic to aquatic organisms and are generally considered undesirable chemicals.

It is an object of the present invention to provide a composition for enhancing the softness of a paper product.

It is another object of the present invention to provide a composition that is substantially free of quaternary ammonium surfactants.

It is yet another object of the present invention to provide one single composition which is suitable for addition to cellulose suspensions and which is treated in a wet or dry paper web, as described in the prior art, but not in several different compositions.

Yet another object of the present invention is to provide a composition having high resistance to anionic carryover from the preceding manufacturing step. Thus, standard compositions can be neutralized at the wet end when small amounts of hazardous substances are released in the preceding manufacturing steps.

It is also an object of the present invention to provide a composition which, when added to a cellulose suspension, imparts low burst strength, high wetting rate and low defiberization energy to the paper produced.

It is another object of the present invention to provide a composition which, when added to a cellulose suspension, will impart a low note content to the product.

invent

The present invention relates to compositions used to enhance softness in paper products, preferably products made from tissues or fluff. The composition can be applied at various stages in the papermaking process. The composition can be added to the cellulose suspension, for example, at the wet end. The composition added to the cellulose suspension to enhance the softness of the product is called a debonder. The composition may also be treated on a paper web to enhance the surface feel of the product, such as softness. When the composition is treated to a wet paper web, the composition is called a softener. When the composition is processed into a dry paper web, the composition is called a lotion.

Compositions of the present invention include

(i) oils, fats or waxes;

(ii) at least one non-ionic surfactant;

(iii) at least one anionic compound selected from anionic microparticles and anionic surfactants; And

(iv) at least one polymer, cationic, non-ionic or amphoteric,

Wherein the non-ionic surfactant is added in an amount of about 60 to about 1000 parts by weight per 100 parts by weight of polymer.

According to one embodiment, the composition is substantially free of quaternary ammonium surfactants. By "substantially free" is meant that less than 5% by weight of the composition consists of quaternary ammonium surfactants, such as less than 1% by weight, or less than 0.5% by weight.

According to the present invention any oil, fat or wax that acts as an emollient may be used. Suitable oils are refined or cured grade oils, most preferably coconut oils, such as vegetable oils such as grape oil, olive oil, coconut oil, rapeseed oil, sunflower oil, and palm oil. Other oils that may be used in accordance with the present invention are mineral oils and silicone oils.

In order to retain oils, fats or waxes in the paper produced, a polymer is needed which functions as a retention aid. Suitable polymers for use as retention agents or as part of retention systems may be highly charged. According to one embodiment, the polymer is a cationic polymer. The polymer may be derived from natural or synthetic raw materials and may be straight, branched or crosslinked, for example in the form of microparticles. Preferably, the polymer is water soluble or water dispersible.

Examples of suitable natural cationic polymers include cationic polysaccharides such as starch, guar gum, cellulose derivatives, chitin, chitosan, glycan, galactan, glucan, xanthan gum, pectin, mannan, dextrin, preferably starch and Guar gum is preferred. Suitable starches include potatoes, corn, wheat, tapioca, rice, waxy corn, oats and the like. Cationic synthetic organic polymers can also be used, such as cationic chain-growth polymers, for example cationic vinyl addition polymers such as acrylate-, acrylamide-, vinylamine-, vinylamide- and allylamine-based polymers. Examples include diallyldialkyl ammonium chloride, such as diallyldimethyl ammonium chloride, and homo- and copolymers based on (meth) acrylamide and (meth) acrylate. Still other polymers are included in the cationic step-growth polymers, which include polyamines such as cationic polyamidoamines, polyethylene imines such as dimethylamine-epichlorohydrin copolymers; And polyurethanes. Another example of a suitable cationic organic polymer includes those disclosed in WO 02/12626.

According to one embodiment, the polymer is selected from the group consisting of polydiallyldimethyl ammonium chloride, polyamine, cationic starch, amphoteric starch, and polyamidoamine-epichlorohydrin (PAAE), polyethylene imine and polyvinylamine do.

As used herein, the term "step-growth polymer" refers to a polymer obtained by step-growth polymerization, and also refers to a step-reaction polymer and a step-reaction polymerization, respectively. As used herein, the term "chain-growth polymer" refers to a polymer obtained by chain-growth polymerization, and also refers to a chain reaction polymer and a chain reaction polymerization, respectively.

Polymers according to the present invention may have a molecular weight of about 10000 to about 10000000, such as about 15000 to about 5000000, or about 40000 to about 1000000.

According to one embodiment, anionic microparticles are included in the composition. Examples of suitable anionic microparticles include anionic silica microparticles such as anionic colloidal silica particles, and smectite clay, most preferably anionic hydrophobically modified colloidal silica particles. The anionic microparticles preferably have a specific surface area of about 40 to about 900, such as about 150 to about 600, or about 250 to about 400 m ² / g.

Colloidal silica particles can be derived from, for example, precipitated silica, micro silica (silica fume), pyrogenic silica (fumed silica) or silica gel, traditional sodium silicate, and mixtures thereof with sufficient purity.

Colloidal silica particles according to the present invention may be modified and may contain other elements such as amines, aluminum and / or boron, which may be present in the particles and / or in the continuous phase. Boron-modified silica sol is disclosed, for example, in US Pat. No. 2,630,410. The aluminum modified silica particles suitably have an Al ₂ O ₃ content of about 0.05 to about 3 weight percent, such as about 0.1 to about 2 weight percent. Procedures for preparing aluminum modified silica sol are further described, eg, in "The Chemistry of Silica" by Her, K. Ralph, by Her, K. Ralph, pages 407-409, John Wiley & Sons (1979) and US 5,368,833. It is described.

Colloidal silica particles suitably have an average particle diameter in the range of about 2 to about 150, such as about 3 to about 50, or about 5 to about 40 nm. Suitably, the colloidal silica particles have a specific surface area of about 20 to about 1500, such as about 50 to about 900, or about 70 to about 600 m ² / g.

Anionic surfactants that can be used in accordance with the present invention are generally anionic surfactants having a hydrophobic "tail" having about 6 to about 30 carbon atoms. Examples of preferred anionic surfactants are saponified fatty acids, alkyl (aryl) sulfonates, sulfate esters, phosphate esters, alkyl (aryl) phosphates, alkyl (aryl) phosphonates, fatty acids, naphthalene sulfonates (NAS), formaldehyde Polycondensates, polystyrene sulfonates, hydrophobically-modified NAS. Most preferred are saponified fatty acids, alkyl (aryl) sulfonates, sulfate esters, phosphate esters, alkyl (aryl) phosphates, alkyl (aryl) phosphonates, and mixtures thereof.

According to one embodiment, the anionic compound is an anionic surfactant.

Non-ionic surfactants that can be used in accordance with the present invention generally include ethoxylated or propoxylated fatty acids or fatty alcohols. Ethoxylated fatty acids and fatty alcohols are preferably ethoxylated with about 1 to about 30 ethylene oxide (EO), or about 4 to about 25 EO. Ethoxylated fatty acids and fatty alcohols may have about 6 to about 30 carbon atoms, or about 6 to about 22 carbon atoms. Propoxylated fatty acids and fatty alcohols may be propoxylated with about 1 to about 30 propylene oxide (PO), or about 1 to about 8 PO. Propoxylated fatty acids and fatty alcohols preferably have about 6 to about 30 carbon atoms, such as about 6 to about 22 carbon atoms. Carbon dioxide may also be used instead of propylene oxide.

The polymer is present in the composition in an amount of about 1 to about 50%, such as about 5 to about 40, or about 10 to about 30 weight percent, based on the dry weight of the composition.

The oil, fat or wax is suitably present in the composition in an amount of about 1 to about 95%, such as about 30 to about 80, or about 35 to about 75 weight percent, based on the dry weight of the composition.

The anionic compound is present in the composition in an amount of about 0.1 to about 10%, suitably based on the dry weight of the composition, such as about 0.5 to about 4, or about 0.6 to about 2% by weight.

According to one embodiment, the non-ionic surfactant is present in an amount of about 70 to about 800, or about 80 to about 600, or about 100 to about 500, or about 150 to about 400 parts by weight per 100 parts by weight of the polymer. .

The composition can be prepared by first mixing the anionic and non-ionic surfactants together with oils, fats or waxes to provide an emollient-surfactant blend. The emollient-surfactant blend may be heated to about 25 to about 70 ° C. Suitably aqueous solutions containing polymers are prepared which, in solution, comprise a polymer content of about 0.1 to about 50, such as about 0.5 to about 25 weight percent. The aqueous solution may be heated to about 25 to about 70 ° C. The emollient-surfactant blend may then be emulsified in an aqueous solution containing the polymer by a fixed mixer, high shear device or high pressure homogenizer. The product emulsion may then be cooled to room temperature. For example, cooling can be performed by using a heat exchanger.

According to one embodiment, the emollient surfactant mixture is emulsified in an aqueous solution containing the polymer by a fixed mixer.

The composition may be prepared in advance and then delivered to the paper machine as a product. The composition can also be prepared in one section in the paper machine from different components.

It is also possible to add additional components to the composition. To prevent degradation of the composition, preservatives may be added. Some cosmetic additives may also be included, such as antioxidants such as tocopherol and aloe vera and the like.

The present invention also relates to a method of making paper comprising adding the composition described herein to a cellulose suspension, wherein the method further comprises draining the cellulose suspension onto a wire to form a paper web.

According to one embodiment, the composition may be added in an amount of dry cellulose fibers of about 0.1 to about 15 kg / ton.

When a debonder is used to make the fluff, the composition is typically added to the cellulose suspension in an amount of dry cellulose fibers of about 0.1 to about 15, such as about 0.3 to about 10 kg / ton.

When a debonder is used for tissue preparation, the composition is typically added to the cellulose suspension in an amount of dry cellulose fibers of about 0.1 to about 15, such as 0.5 to about 4 kg / ton.

If the composition is used as a debonder in this process, the composition already mentioned herein is added to the cellulose suspension before the paper web is formed. The use of debonders is very common in the manufacture of fluff and tissue. The debonder will interfere with natural fiber-to-fiber bonds and reduce strength. By reducing the strength, the softness of the fluff and tissue products is increased. According to one embodiment, the components of the composition may be added separately to the cellulose suspension. Preferably, emulsions of oils, fats or waxes and anionic and non-ionic surfactants can be added, for example, as pre-blends and polymers to aqueous solutions and as separate components to the cellulose suspension.

According to one embodiment, when the components are added separately, the amount of each component added to the cellulose suspension corresponds to the amount of each component in the composition as described herein.

According to one embodiment, in the preparation of the fluff, the polymer may be added to the cellulose suspension in an amount of dry -cellulose fibers of about 0.01 to about 6 kg / ton. According to one embodiment, in the preparation of the fluff, the polymer may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.025 to about 3.5 kg / ton. According to one embodiment, in the preparation of the fluff, the polymer may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.05 to about 2.5 kg / ton.

According to one embodiment, in the preparation of the fluff, oils, waxes or fats may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.001 to about 14 kg / ton. According to one embodiment, in the preparation of the fluff, oil, wax or fat may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.03 to about 12 kg / ton. According to one embodiment, in the preparation of the fluff, oils, waxes or fats may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.035 to about 11 kg / ton.

According to one embodiment, in the preparation of the fluff, the anionic compound may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.001 to about 1.5 kg / ton. According to one embodiment, in the preparation of the fluff, the anionic compound may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.003 to about 0.6 kg / ton. According to one embodiment, in the preparation of the fluff, the anionic compound may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.004 to about 0.3 kg / ton.

According to one embodiment, in the preparation of the fluff, the non-ionic surfactant is suitably about 80 to about 600, or about 100 to about 500, or about 150 to about 400 parts by weight per 100 parts by weight of the polymer. It is added to the cellulose suspension in an amount of 70 to about 800 parts by weight.

According to one embodiment, in preparing fluff, oil, wax or fat is added in an amount of dry cellulose fibers from about 0.001 to about 14 kg / ton and the anionic compound is from about 0.001 to about 1.5 kg / ton of dry cellulose The amount of fiber is added and the polymer is added in an amount of dry cellulose fiber of about 0.01 to about 6 kg / ton.

According to one embodiment, in making the tissue, the polymer may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.01 to about 8 kg / ton. According to one embodiment, in making the tissue, the polymer may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.03 to about 6 kg / ton. According to one embodiment, in making the tissue, the polymer may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.035 to about 5.5 kg / ton.

According to one embodiment, in making the tissue, oil, wax or fat may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.001 to about 10 kg / ton. According to one embodiment, in making the tissue, oil, wax or fat may be added to the cellulose suspension in an amount of about 0.03 to about 8 kg / ton dry cellulose fibers. According to one embodiment, in making tissues, oil, wax or fat may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.035 to about 7.5 kg / ton.

According to one embodiment, in making the tissue, the anionic compound may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.001 to about 1 kg / ton. According to one embodiment, in making the tissue, the anionic compound may be added to the cellulose suspension in an amount of about 0.003 to about 0.4 kg / ton of dry cellulose fibers. According to one embodiment, in making the tissue, the anionic compound may be added to the cellulose suspension in an amount of dry cellulose fibers of about 0.004 to about 0.2 kg / ton.

According to one embodiment, in making the tissue, the non-ionic surfactant is suitably about 80 to about 600, or about 100 to about 500, or about 70 to about 800 parts by weight, such as about 150 to about 400 parts by weight. Can be added to the cellulose suspension in an amount.

In order to evaluate the performance of the debonder, burst strength, defiberization energy and wetting speed can be measured. Low burst strength and low defiberization energy are weak in fiber-to-fiber bonding, which in turn shows that it facilitates the manufacture of tissues with improved softness. The wetting rate indicates that the final product will have good absorbency.

In addition, when fluff is used in air-laid applications, it is important to minimize the number of knots. A note can be described as a fibrous mass. A large number of notes can lead to poor moldability and runability in the air-laid process.

When the composition is treated with a wet or dry paper web, the surface feel can be improved. Surface feel can be described as surface quality, which is the feel perceived by the consumer. Surface feel can be evaluated by people in panel experiments. Examples of these properties are softness, slippage and smoothness. According to one embodiment, the composition is added to the sheet in one single addition. According to another embodiment, the polymer may be added to the cellulose suspension prior to the formation of the web, while oils, fats or waxes; Anionic compounds; And non-ionic surfactants are added to the wet or dry paper web.

The invention also relates to a method of making paper, comprising the step of treating the composition described herein to a wet paper web. When the composition is used in the papermaking process as a softener, the composition is typically sprayed onto the wet paper web after the press section but before the Yankee cylinder. By using the composition as a softener, it is possible to obtain paper with a minimum reduction in strength and a very large surface smoothness.

According to one embodiment, when the composition is used to make thin paper as a softener, the composition is typically added in an amount of dry cellulose fibers of about 0.1 to about 10, preferably about 0.3 to about 4 kg / ton.

The present invention also relates to a method of making paper comprising treating the composition described herein to a dry paper web.

When the composition is used as a lotion in the process, it is usually sprayed or printed onto a dry paper web. This is typically done in the conversion process in which the final tissue product is formed. The lotion is present as a droplet on the paper web surface and does not bind the fibers in the same way as a softener. The lotion modifies the surface properties of the tissue, but is added for cosmetic reasons because the lotion can also be released from old paper and delivered to the consumer.

According to one embodiment, the dry paper web has a dry content of at least about 50%, such as at least about 65, or at least about 80% by weight.

According to one embodiment, when the composition is used as a lotion in tissue making, the composition is typically added in an amount of dry cellulose fibers of about 0.1 to about 70 kg / ton, such as about 5 to about 50 kg / ton.

Cellulose fibers used by the present invention will typically include fibers derived from wood pulp, such wood pulp including chemical pulp, such as kraft, sulfite and sulfate pulp, and ground wood, hot air pulp and chemically modified hot air systems. Mechanical pulp such as pulp is included. Recycled fibers may also be used. The recycled fiber may contain all of fillers, printing inks, etc. in addition to the above-mentioned pulp. However, chemical pulp is preferred because chemical pulp imparts a better soft feel to the tissue sheets produced therefrom. The use of recycled fibers in tissue making often involves a process step known as demelting to remove the amount of printing ink and most fillers from the fiber slurry to obtain acceptable whiteness and paper machine runability. Deinking processes often include adding anionic materials such as saponified fatty acids and water glass to the fiber slurry. These materials are sometimes carried out in paper machines, and because they are anionic, they can inactivate cationic chemicals added to the stock. These substances are called anionic hazardous substances or "anionic waste."

According to one embodiment, further ingredients may be added to the cellulose suspension used to prepare the tissue or fluff. Such additives can be, for example, wet strength formulations, dry strength formulations, and wetting agents, as well as other components conventionally used in the manufacturing process. According to one embodiment, the additional polymer is cationic, non-ionic or amphoteric and can be added to the cellulose suspension. Suitably the polymer is, for example, a natural polymer such as starch, or a synthetic polymer.

According to one embodiment, the anionic polymer is added to the cellulose suspension, which may comprise anionic step-growth polymers, chain-growth polymers, polysaccharides, natural aromatic polymers and variants thereof.

The invention is further illustrated by the following examples, but the invention is not to be considered as being limited by the following examples.

Example  One

Unsubstituted 16 to 18 carbon atoms which are first mixed with para-substituted alkyl benzylsulphonic acid (~ C12) (anionic surfactant) and coconut oil and ethoxylated using 5 EO (non-ionic surfactant) Mixing with a fatty alcohol produced a composition of the present invention. The content of the components was 50% by weight oil, 25% by weight anionic surfactant and 25% by weight non-ionic surfactant. The oil-surfactant blend was then heated to 50 ° C. A polymer aqueous solution was prepared. The concentration of polymer in the aqueous solution was 1 to 4% by weight. The polymer concentration for each composition is specified below. The aqueous polymer solution was heated separately to 50 ° C. The oil-surfactant blend was then emulsified in aqueous polymer solution under high shear ultra-turrax. The composition was then cooled to room temperature in a water bath. The weight ratio of the oil-surfactant blend to the aqueous solution was 15:85.

The concentrations of the polymers and aqueous solutions used to prepare the compositions C1-C6 are listed below:

C1: 1 wt% poly-DADMAC (SNF No. FL45DL)

C2: 3.4 wt% poly-DADMAC (SNF No. FL45DL)

C3: 4 wt% poly-DADMAC (SNF No. FL45DL)

C4: 1 wt% poly-DADMAC (SNF No. FL45C)

C5: 4 wt% poly-DADMAC (SNF No. FL45C)

C6: 1 wt% polyamine

For comparison, a debonder composition sold under the trade name Berocell® was used. The contents of two debonder compositions comparison 1 and 2 are shown below.

1: Beroceil-589, hydrogenated tallow benzyl dimethyl ammonium chloride; Unsaturated ethoxylated C16-18 fatty alcohols with 5 EO

Comparative 2: Berocell-509, dihydrogenated tallow dimethyl ammonium chloride; C16-C20 fatty alcohols unsaturated ethoxylated with 6 EO; C12-C18 fatty acids propoxylated with 6PO

A dry paper sheet was prepared by mixing 15 grams of chemical pine sulphate pulp with up to 750 ml of water or contaminated white water. The composition was added to the pulp suspension and then stirred for 10 minutes. The sheets were then prepared in a standard PFI-sheet former (A4 sheet). The sheet was then pressurized, dried and conditioned according to the standard method SCAN C26: 76.

Example  2

References to compositions C2 and C5 according to example 1 as described in example 1. 1 (Berocell-589). The composition was added to the cellulose suspension in an amount of 3.0 kg / ton based on dry cellulose fibers.

A dry paper sheet was then prepared as described in Example 1. The paper sheet was cut into stripes and then defiberized using a pin-defiberizer.

The pin-defiberizer is connected to an energy meter which enables to measure the energy consumption per kg of paper, ie the defiberization energy. The results are shown in Table 1.

Defiberization Energy (kJ / kg) Composition tap water jobless C3 56 74 C4 50 69 compare. One 61 88

Lower defiberization energy will give the product a higher degree of softness. In Table 1, it is clearly shown that the compositions, C3 and C5 of the present invention impart lower defiberization energy, which shows an improved softness compared to comparison 1, a composition according to the prior art.

Example  3

Compositions C1, C3, C4, C5 and C6 according to Example 1 were compared with Comparative 1 of Example 1. The composition was added to the cellulose suspension in an amount of 3.0 kg / ton based on dry cellulose fibers.

A dry paper sheet was then prepared according to Example 1. The wet rate for the dry paper sheet was measured according to the standard method SCAN-C33: 80. The results can be seen in Table 2.

Composition Wetting Speed (s / 3g Pulp) C1 3.8 C3 4.1 C4 4.0 C5 4.3 C6 3.9 compare. One 5.6

Low wetting rates are advantageous for both tissue and fluff products. In Table 2, the compositions according to the invention, C1, C3, C4, C5, and C6, compared with the compositions according to the prior art. It clearly shows that the paper produced compared to 1 gives a lower wetting rate.

Example  4

Comparison of Example 1 with Composition C2 of Example 1. Compared with 2. The amount of composition added to the cellulose composition varies from 0.5 to 4.0 kg / ton based on the dry cellulose fiber.

Dry paper sheets were prepared from cellulose suspensions as described in Example 1. Burst strength was measured according to the standard method ISO 2758-2001. The results can be seen in Table 3.

Bursting Strength (kPa% vs. Comparison) Added amount kg / ton paper C2 compare. 2 0.5 77 91 1.0 65 75 1.5 55 63 2.0 45 58 2.5 40 50 3.0 37 49 3.5 32 45 4.0 30 43

Low burst strength will give the product a softness. In Table 3, the composition according to the invention, C2 is a composition of the prior art, comparison. Compared to 2 clearly shows that it has lower burst strength for various amounts of added composition.

Example  5

Comparison of Example 1 with Composition C2 of Example 1. Compared with 2. The amount of composition added to the cellulose suspension varied from 1 to 2 kg / ton based on dry cellulose fibers.

The note content was determined using the standard method SCAN-CM 37. The results can be seen in Table 4.

Added amount kg / ton dry paper note% C2 One 3.3 C2 2 1.1 compare. One One 4.2 compare. One 2 1.5

A large number of notes can lead to inferior running and formability. Therefore a low note content is advantageous. In Table 4, the composition of the present invention, C2 is compared. Clearly have fewer notes than 1

Example  6

Anionic surfactant, alkyl benzylsulphonic acid (~ C12) and coconut oil are first mixed, and two non-ionic surfactants, (1) ethoxylated caster oil using (15) EO and (2) 5 An oil-surfactant blend was prepared by mixing ethoxylated C16-C18 unsaturated fatty alcohols using EO. The oil-surfactant blend is then emulsified in water to form an oil emulsion. 0.3 g of oil-surfactant blend was used in 100 ml of water. An aqueous polymer solution containing polyDADMAC having a polymer concentration of 0.08% by weight was prepared.

A dry paper sheet was prepared by mixing 15 grams of chemical fine sulphate pulp with up to 750 ml of water. An oil emulsion was added to the pulp suspension. The suspension was then stirred for 8 minutes. The polymer solution was then added, at which time the suspension was stirred for 2 minutes. The sheets were then prepared in a standard PFI-sheet former (A4 sheet). The sheet was then pressurized, dried and conditioned according to the standard method SCAN C26: 76. The weight of each component added to each test is given in Table 5.

Composition number Coconut oil Non-ionic Surfactant (1) Non-ionic Surfactants (2) Anionic surfactant Polymer One 9.2 0.40 0.30 0.1 2.67 2 8.7 0.65 0.55 0.1 2.67 3 8.1 0.95 0.85 0.1 2.67 4 7.6 1.2 1.1 0.1 2.67 5 5.0 2.45 2.45 0.1 2.27

The ratio of non-ionic surfactant to polymer was calculated as parts by weight of non-ionic surfactant per 100 parts by weight of polymer. Defiberization energy was measured according to Example 2. The amount of composition added was 1 kg / ton and 3 kg / ton of dry cellulose fibers. The results are given in Table 6.

Composition number 100 parts by weight of sugar nonionic surfactant Defiberization Energy (kJoule / kg) 1 kg / ton 3 kg / ton One 26 132 124 2 45 125 115 3 67.5 103 67 4 86 98 64 5 216 93 62

Lower defiberization energy will give the product a higher degree of softness. In Table 6, it can be clearly seen that the defiberization energy decreases as the weight ratio of non-ionic surfactant to polymer increases.

Example  7

Two oil emulsions, E1 and E2, were prepared by mixing two non-ionic surfactants, (1) castor oil ethoxylated with 15 EO and (2) unsaturated C16-C18 fatty alcohols ethoxylated with 5 EO Prepared. In emulsion E1, coconut oil; The weight ratio between the non-ionic surfactant (1) and the non-ionic surfactant (2) was 5: 2.5: 2.5, and 7: 1.5: 1.5 in the emulsion E2. The oil emulsion was formed by emulsifying 15 g of oil-surfactant blend with 85 g of 0.353 wt% dispersion silica sol having a specific surface area of 525 m ² / g using ultra-turrax. An aqueous polymer solution containing polyDADMAC having a concentration of 0.08 wt% was also prepared.

A dry paper sheet was prepared by mixing 15 grams of chemical fine sulphate pulp with up to 750 ml of water. The oil emulsion was added to the pulp suspension and stirred for 8 minutes. The polymer solution was then added and stirred for 2 minutes. The sheets were then prepared in a standard PFI-sheet former (A4 sheet). The sheet was then pressurized, dried and conditioned according to the standard method SCAN C26: 76. In Experiment 3, comparison in Example 1. The traditional debonder Berocell 589, referred to as 1, was used for comparison. When preparing the sheet, the suspension was stirred for 10 minutes after adding a traditional debonder. Defiberization energy was measured in accordance with Example 2. The results are given in Table 7.

Experiment Defiberization Energy (kJoule / kg) One E1 64 2 E2 62 3 compare. One 78

Lower defiberization energy will give the product a higher degree of softness. In Table 7, the compositions of the present invention, El and E2, are compared to traditional debonders. It can be clearly seen that it provides a lower defiberization energy than one.

Example  8

The same oil-surfactant blend and polymer solution as No. 5 in Table 5 was prepared according to Example 6. In Experiment 1, the oil-surfactant blend was emulsified into the polymer solution to form one single composition.

A paper sheet was prepared by mixing 15 grams of chemical fine sulphate pulp with up to 750 ml of water. The pulp suspension was then stirred for 10 minutes. In Experiment 2, the polymer was added after stirring for 8 minutes. In experiments 1 and 3, no addition was made to the pulp suspension. The sheets were then prepared in a standard PFI-sheet former (A4 sheet). The sheet was then pressurized at 4.85 Bar for 5 minutes, resulting in a dry content of about 50% by weight.

In Experiment 1, the composition was sprayed onto the sheet in amounts of 1 and 3 kg / ton of dry cellulose fibers. In Experiment 2, an oil emulsion containing an oil-surfactant blend was sprayed onto the sheet to add a total of 1 and 3 kg / ton of dry cellulose fibers along with the polymer in the pulp suspension.

In Experiment 3, comparison in Example 1. The traditional debonder Berocell 589 mentioned as 1 was used for comparison. Traditional debonders were sprayed onto sheets in amounts of dry cellulose fibers of 1 and 3 kg / ton.

The sheet was then pressurized to 4.85 Bar for 2 minutes and then dried in a drum at 80 ° C. for 2 hours. After drying, the sheets were conditioned at least 24 hours at 23 ° C. and 50% relative humidity before testing.

Then defiberization energy was measured according to Example 2, the note content was measured according to the standard method SCAN-CM 37, and the wetting rate was measured according to the standard method SCAN-C33: 80. The results are given in Table 8.

Experiment number Defiberization Energy (kJoule / kg) Knots (%) Wetting speed (s) 1 kg / ton 3 kg / ton 1 kg / ton 3 kg / ton 1 kg / ton 3 kg / ton One 97 78 3.66 2.00 4.2 4.4 2 93 83 3.66 1.67 4.4 4.7 3 122 84 4.00 2.67 5.0 5.2

The compositions used in Experiments 1 and 2 show a clear improvement in defiberization energy, note content and wetting rate over Experiment 3 in which traditional debonders were used.

Example  9

First anionic surfactant, alkyl benzylsulphonic acid (~ C12) and coconut oil are mixed, two non-ionic surfactants, (1) castor oil ethoxylated with 15 EO and (2) ethoxy with 5 EO An oil-surfactant blend was prepared by mixing the simulated unsaturated C16-C18 fatty alcohols. The oil-surfactant blend was then emulsified with water to form an oil emulsion. 0.3 g of oil-surfactant blend was used in 100 ml of water. An aqueous solution containing the cationic starch, Amylofax PW, having a concentration of 0.08% by weight was prepared.

A dry paper sheet was prepared by mixing 15 grams of chemical fine sulphate pulp with up to 500 ml of water. The oil emulsion was added to the pulp suspension at 0 hours and then stirred for 10 minutes. After 8 minutes cationic starch was added. It was then pressurized, dried and conditioned in a standard PFI-sheetformer. Cationic starch was added in the amount of dry cellulose fibers of 2.5 kg / ton. The addition of oil emulsions varied in 0-3 kg / ton of dry cellulose fibers. Defiberization energy was measured in accordance with Example 2. The results are given in Table 9.

Defiberization Energy (kJoule / kg) Amount of oil emulsion added 0 kg / ton 1 kg / ton 2 kg / ton 3 kg / ton 168 145 118 90

Lower defiberization energy will give the product a higher degree of softness. In Table 9 it can be clearly seen that as the amount of oil emulsion increases, the defiberization energy decreases.

The present invention relates to compositions used to enhance the softness in paper products. The composition comprises (i) an oil, a lipid or a wax (ii) at least one non-ionic surfactant (iii) at least one anionic compound selected from anionic microparticles and anionic surfactants (iv) cationic, non At least one polymer that is ionic or amphoteric, wherein the non-ionic surfactant is added in an amount of about 60 to about 1000 parts by weight per 100 parts by weight of the polymer. The present invention also relates to a method of making paper comprising the step of adding the composition to a cellulosic suspension or a wet or dry paper web.

Claims (22)

Compositions comprising: (i) oils, fats or waxes; (ii) at least one non-ionic surfactant; (iii) at least one anionic compound selected from anionic microparticles and anionic surfactants; And (iv) at least one polymer that is cationic, non-ionic or amphoteric Wherein the non-ionic surfactant is present in an amount of 100 to 1000 parts by weight per 100 parts by weight of the at least one polymer. The composition of claim 1, wherein the composition is substantially free of quaternary ammonium surfactants. The composition of claim 1 or 2, wherein the polymer is a cationic polymer. The composition of claim 3, wherein the cationic polymer is a chain-growth polymer. The composition of claim 3, wherein the cationic polymer is a step-growth polymer. The composition of claim 1 or 2, wherein the oil is a vegetable oil. The composition of claim 1 or 2, wherein the oil is coconut oil. delete delete The composition of claim 1 or 2, wherein the non-ionic surfactant is added in an amount of 100 to 800 parts by weight per 100 parts by weight of the polymer. The composition of claim 1 or 2, wherein the non-ionic surfactant is an ethoxylated or propoxylated fatty acid or fatty alcohol. The method of claim 1 or 2, wherein the anionic surfactant is a saponified fatty acid, alkyl (aryl) sulfonate, sulfate ester, phosphate ester, alkyl (aryl) phosphate, alkyl (aryl) phosphonate, and mixtures thereof A composition, characterized in that it is selected from the group consisting of. A method of making paper comprising the step of adding the composition of claim 1 to a cellulose suspension, the method further comprising dewatering the cellulose suspension on a wire to form a paper web. 13. The method of claim 12, wherein the composition is added with dry cellulose fibers in an amount of 0.1 to 15 kg / ton. A method of making paper comprising the steps of adding to the cellulose suspension: (i) oils, fats or waxes; (ii) at least one non-ionic surfactant; (iii) at least one anionic compound selected from anionic microparticles and anionic surfactants; And (iv) at least one polymer that is cationic, non-ionic or amphoteric, Wherein the method further comprises dewatering the cellulose suspension on a wire to form a paper web, wherein the non-ionic surfactant is added in an amount of 60 to 1000 parts by weight per 100 parts by weight of the polymer. The method of claim 15, wherein the oil, wax or fat is added in an amount of 0.001 to 14 kg / ton of dry cellulose fiber, the anionic compound is added in an amount of 0.001 to 1.5 kg / ton of dry cellulose fiber, Wherein said polymer is added in an amount of 0.01 to 6 kg / ton of dry cellulose fibers. A method of making paper, comprising treating the wet paper web with the composition of claim 1. 18. The method of claim 17, wherein the composition is treated in an amount of 0.1 to 10 kg / ton of dry cellulose fibers. A process for producing paper comprising the step of treating the composition of claim 1 or 2 to a dry paper web. 20. The method of claim 19, wherein the composition is treated in an amount of 0.1 to 70 kg / ton of dry cellulose fibers. 16. The method of claim 13 or 15, wherein the non-ionic surfactant is added in an amount of 80 to 1000 parts by weight per 100 parts by weight of the polymer. 16. The method of claim 13 or 15, wherein the non-ionic surfactant is added in an amount of 100 to 1000 parts by weight per 100 parts by weight of the polymer.