WO2008072661A1

WO2008072661A1 - Kitchen paper

Info

Publication number: WO2008072661A1
Application number: PCT/JP2007/073952
Authority: WO
Inventors: Akira Hirasawa
Original assignee: Daio Paper Corporation
Priority date: 2006-12-13
Filing date: 2007-12-12
Publication date: 2008-06-19
Also published as: JP2008142434A; JP4448509B2

Abstract

[PROBLEMS] To provide kitchen paper excellent in oil absorption. [MEANS FOR SOLVING PROBLEMS] A kitchen paper obtained by laminating plural sheets, wherein the face is constituted of an embossed sheet having a basis weight of 15 to 60g/m2 and a sheet density of less than 0.14g/cm3 and the back is constituted of a sheet having a sheet density of 0.14g/cm3 or above.

Description

Specification

、、 / Hand 、ノ ^ ~ ^ ノヽ ^ ~ 'Technical Field

[0001] The present invention relates to kitchen paper, and more particularly, to a kitchen paper excellent in oil absorption.

Background art

[0002] In kitchens, kitchens, etc., so-called kitchen paper made of paper non-woven fabric is widely used. Kitchen paper can be used for food packaging, boiled drop lids, drip absorbent for fresh fish, water draining, oil simmering, absorption of excess oil in deep-fried food, wiping and cleaning around the kitchen, etc. S, liquid absorption Therefore, the kitchen paper is generally formed by laminating an appropriate number of sheets of crepe paper and nonwoven fabric that have been embossed to prevent capillary action due to gaps between the sheet fibers. The main liquid absorption mechanism is configured to take in moisture, oil, and the like into the gaps between the embossments of each sheet.

Patent Document 1: JP 2001-146665

Patent Document 2: JP 2005-132710

Disclosure of the invention

Problems to be solved by the invention

[0003] However, conventional products often have a sufficient absorption rate for water with a low viscosity, but the viscosity is higher than that of water! / And the absorption rate of oil is not sufficient. There are few cases! /. For example, when fried food, the force to lay kitchen paper on the pad that picks up the deep fried food that absorbs excess oil S, the oil absorption speed is insufficient, and the oil from the fried food may accumulate on the sheet It is often seen.

Therefore, the main problem of the present invention is that it has excellent oil diffusibility on the sheet surface, can retain oil in a wide range of sheets, has a large amount of oil absorption, and oil is quickly moved to the gap between sheets. To provide kitchen paper.

Means for solving the problem [0004] The present invention and effects obtained by solving the above-described problems are as follows.

A kitchen paper made by laminating a plurality of sheets,

The sheet constituting the surface is embossed, the basis weight is 15-60 g / m ² , the sheet density is less than 0.14 g / cm ³ ,

The sheet density of the sheet constituting the back surface is 0.14 g / cm ³ or more,

Kitchen paper characterized by that.

[0005] <Invention of Claim 2>

2. The kitchenette according to claim 1, wherein the sheet constituting the front and back surfaces is a sheet made of pulp.

[0006] <Invention of Claim 3>

The kitchen paper according to claim 1 or 2, wherein the sheets constituting the front and back surfaces are embossed, and the tops of the embosses applied to each sheet are adhered to each other.

[0007] <Invention of Claim 4>

The kitchen paper according to claim 1 or 2, wherein the sheet constituting the front and back surfaces is embossed and the top and bottom of the emboss applied to each sheet are adhered.

<0008> <Invention of claim 5>

The kitchen paper according to any one of claims 1 to 4, wherein the adhesion area ratio power S between the top sheet and the back sheet is 3 to 20%.

[0009] <Invention of Claim 6>

The kitchen paper according to any one of claims 1 to 5, wherein a sheet constituting the surface is coated or impregnated with a triglyceride having 6 to 12 carbon atoms and 12 saturated carbon atoms.

The invention's effect

[0010] In the present invention, the sheet constituting the surface is embossed, the basis weight is 15 to 60 g / m ² , the sheet density is less than 0.14 g / cm ^3, and the sheet density of the sheet constituting the back surface is 0. By setting it to 14 g / cm ³ or more, the oil absorption amount is improved, the oil is rapidly moved to the gap between the sheets, and the oil retention in the gap is enhanced. In addition, the sheet density of the sheet constituting the front surface is lower than that of the sheet constituting the back surface, so that good oil absorption on the top sheet side is achieved. While ensuring the performance, the oil can be prevented from falling through.

Preferably, the dry tensile strength in the machine direction of the top sheet is 2500 cN or less, and the dry tensile strength in the transverse direction is 700 cN or less.

Furthermore, if the sheet | seat which comprises front and back is made into a pulp raw material, it can manufacture at low cost. Embossing is applied to the sheets that make up the front and back surfaces! /, And the relationship between the embosses of each sheet is bonded to the embossed tops of each sheet. Alternatively, when the so-called “Nested” type is used in which the top and bottom of the emboss applied to each sheet are bonded together, a gap is surely formed between the sheets, and oil retention is further improved.

When bonding the top sheet and the back sheet, it is desirable that the bonding area ratio be 3 to 20% because the sheets can be bonded to each other reliably and the influence of the liquid absorption inhibition by the bonded portion is small. In addition, the effect of hardening by the adhesive is small, and the softness by the embossing can be secured sufficiently, and the influence of the oil absorption inhibition by the bonded part is also small. Furthermore, if the sheet constituting the surface is coated or impregnated with 6 to 12 carbon atoms and saturated triglycerides, the oil absorption performance can be further improved.

As described above, according to the present invention, the oil diffusibility on the sheet surface is excellent, the oil content can be retained in a wide range of the sheet, the oil absorption amount is large, and the oil is quickly moved to the gap between the sheets. Kitchen paper is provided.

BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described in detail below with reference to the drawings. Fig. 1 is an enlarged cross-sectional view of kitchen paper XI in this form.

The kitchen paper XI of this embodiment is formed by laminating a plurality of sheets 1 and 2, and the sheets constituting the front and back surfaces are sheets made from pulp, and both are embossed. In the illustrated embodiment XI, only a top sheet 1 and a back sheet 2 are employed. However, in the present invention, an appropriate number of intermediate layers may be interposed between the front and back sheets. Moreover, the sheet | seat which comprises a back surface does not necessarily need to be embossed.

Each component of this kitchen paper is not limited! /, But in consideration of absorption of excess oil such as deep-fried food, use of high-temperature oil for oil strainers, etc., it comes into contact with high-temperature oil of about 200 ° C. However, it is desirable to use a material that does not melt or denature.

The sheets 1 and 2 constituting the front and back surfaces are sheets made of pulp such as non-woven fabric using pulp fibers, stacked fiber pulp sheets, thin papers, crepe papers, and the like, which can be used for kitchen paper. It is selected from the inside. Of course, the seat design is based on the configuration of the present invention. As the raw material for the sheet, the ability to use synthetic fibers as well as pulp is the most suitable, considering the ease of production and cost.

The front and back sheets 1 and 2 do not need to be made of the same material, and a configuration in which different sheet types are combined as necessary can be adopted.

[0012] The basis weight of the entire paper towel XI is preferably from flexibility and strength points or less 30 g / m ² or more on 120 g / m ^2. More preferably 50 g / m ² or more 100 g / m ² hereinafter. If the basis weight is too small, the strength becomes insufficient and the embossing effect is difficult to be exhibited, and the liquid retention is lowered. On the other hand, if the basis weight is too large, the flexibility decreases.

This form of kitchen paper XI is characteristic in terms of the basis weight of the top sheet and the sheet density with the sheet constituting the back surface. First, the basis weight (weight per unit area) of the top sheet 1 has a relatively high basis weight as one layer of the kitchen paper. Specifically, it is 15 g / m ² or more and 60 g / m ² or less. Preferably, it is 20 g / m ² or more and 40 g / m ² or less. If the basis weight is too small, even if embossed e, e... Are given clearly and clearly, they are liable to collapse and liquid retention is reduced. On the other hand, if the basis weight is too large, the flexibility decreases or the rigidity becomes large when the sheet is bent.

[0013] Next, the sheet density of the top sheet is configured to be lower than the sheet density of the sheet constituting the back surface. As a result, the oil is quickly received from the surface sheet surface and moved into the gap between the sheets, and the moved oil is held in the gap.

The specific sheet density of the top sheet is relatively low for a kitchen paper layer, less than 0.14 g / cm ³ . If the sheet density is higher than 0.14 g / cm ³ , oil diffusibility cannot be obtained, and the absorption rate decreases. The lower limit of the sheet density is preferably set to 0. Olg / cm ³ or more in consideration of strength.

By adopting the composition of the basis weight and sheet density of the above surface sheet, kitchen paper having an unprecedented oil absorption rate and oil retention can be obtained. [0014] Here, in particular, it is preferable that the surface sheet has a relatively high dry tensile strength as a single layer of kitchen paper. Specifically, the dry tensile strength in the machine direction is 2500 cN. In the following, the transverse dry tensile strength should be 700 cN or less. If the dry tensile strength is excessively high, the flexibility decreases. On the other hand, if it is too low, the shape retainability of the embossing is lowered, and for example, the risk of the embossing being broken during oil absorption increases. By making the strength and tensile strength strong, the mobility of oil into the air gap and the retention of oil and water are improved. The dry tensile strength of the present invention is based on JIS P 8113.

On the other hand, the back sheet preferably has a basis weight similar to that of the top sheet, that is, 15 g / m ² or more and 60 g / m ² or less. The basis weight is more preferably 20 g / m ² or more and 50 g Z m or less.

The sheet density of the back sheet is preferably higher than that of the top sheet, that is, 0.14 g / cm ³ or more. The upper limit of the sheet density is preferably 0.50 g / cm ³ or more in consideration of softness and the like.

By setting the strength, the basis weight of the back sheet and the sheet density, the anti-through-through effect is effectively expressed due to the relationship with the top sheet. Also, embossing e, e ... can be given clearly and clearly, and it is difficult to collapse.

[0016] In addition, the thickness of each sheet should be about 200 μm or more and less than 300 μm for the top sheet and about 100 μm or more and less than 200 μm for the back sheet! No!

On the other hand, the raw material pulp of each sheet is, for example, wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, etc., more specifically, groundwood pulp (GP), stone grand pulp (SGP), refiner ground pulp ( Mechanical pulp (MP), chemical mechanical pulp (RGP), pressurized groundwood pulp (PGW), thermo-mechanical double pulp (TMP), chemi-thermo mechanical pulp (CTMP), bleached chemisa-mo mechanical pulp (BCTMP) CGP), semi-chemical pulp (SCP), hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP) and other kraft pulp (KP), soda pulp (AP), sulfite pulp (SP), dissolving pulp (DP) and other chemical pulp (CP), nylon, rayon, polyester, polybutyl alcohol (PVA) and other synthetic pulp, ground pulp (TP), cotton, flax, hemp, jute, maw Rough pulp, straw pulp, esvaltopal made from leek, ramie, etc. One or several types can be appropriately selected and used from stalk and pulp such as pulp, bagasse pulp, bamboo pulp and kenaf pulp, and auxiliary pulp such as bast pulp.

[0017] These raw material pulps, for example, based on a known papermaking technology, specifically through a wire part, a press part, a dryer part, a creping part, a size press, a calendar part, etc. It is a sheet before embossing.

When making paper, for example, appropriate agents such as pH adjusters such as dispersants, caustic soda and aqueous ammonia, antifoaming agents, preservatives, fluorescent dyes, mold release agents, water resistance agents, flow modifiers, yield improvers, etc. Can be added.

[0018] Here, in producing the above-mentioned characteristic surface sheet, it can be achieved by adjusting the freeness (CSF) of raw material pulp slurry to 600cc or more and using a papermaking raw material to which a softening agent is added. is there. This freeness value is extremely low compared to the papermaking raw material of general kitchen paper sheets. Given the force and freeness, the surface sheet can be designed to have the basis weight, sheet density, and dry tensile strength shown above. As the softening agent, softening agents such as known surfactants can be used. Cationic surfactants, particularly fatty acid esters and fatty acid amides are particularly suitable.

[0019] On the other hand, the sheet constituting the surface layer is preferably coated or impregnated with a triglyceride having 6 to 12 carbon atoms and saturated. This gives the top sheet 1 the effect of improving the diffusibility and absorption rate of one layer of oil. As a method for incorporating triglyceride into the nonwoven fabric sheet, a known method for internally or externally adding a drug to a sheet can be used. For example, if it is added internally, it is possible to use a method of making paper from raw pulp or raw pulp slurry added with triglyceride. In the case of external addition, after the sheet is formed, triglycerides can be dispersed, applied, and applied. If spraying, a known spray device that sprays the drug on the sheet can be used, and if coating is performed, a known coating machine or printing machine can be used.

[0020] The method of laminating and bonding the sheets 1 and 2 is not particularly limited, but preferably a method in which embossing is applied to the sheet or embossing is performed, and the sheet is laminated on the facing sheet and bonded with an adhesive. Can be taken. Adhesives used for bonding between sheets are, for example, PVA (polyvinyl alcohol), CMC (carboxyl methylcellulose), starch Etc. are suitable.

Here, the adhesion area ratio between the top sheet and the back sheet, that is, the ratio of the area of the adhesion part to the sheet area (one side) is preferably in the range of 3 to 20%. Within this range, the effect of hardening by the adhesive is small, and the softness by the embossing can be sufficiently secured, and the influence of the oil absorption inhibition by the bonded portion is also small.

As a method of applying the adhesive 3, a method of spraying, applying, and applying can be employed. If spraying, a known spray device that sprays the drug on the sheet can be used, and if coating is performed, a known coating machine or printing machine can be used.

[0021] Here, in this embodiment, the embossing relationship between the two sheets is, as is clear from the drawings and the above description, the tops t, t ... of the embosses e, e ... of the front and back sheets 1, 2 ... Force S taking the form of so-called “Tip to Tip” that faces each other S, but not limited to this, adopting the so-called “Nested” form in which the top of the embossed surface sheet and the bottom of the back sheet are bonded together Is also possible. In particular, the “Tip to Tip” form is superior in terms of large voids and high oil retention, and the “Nested” form is superior in terms of oil diffusibility. The top part t is the top surface of the convex part protruding so as to approach from the facing sheet, and the bottom part is the bottom surface of the concave part recessed so as to be separated from the facing sheet.

The embossing performed on the sheet can be performed, for example, by passing the embossed sheet between a pair of embossing rolls. The pair of embossing rolls is preferably a force _S that can be both a metal roll, one is an elastic roll made of rubber or the like, and the other is a metal roll having an embossing projection. The combination of the elastic roll and the metal roll is preferable because there is no problem in adjusting the clearance of the roll, or problems such as paper dust clogging the roll!

[0022] On the other hand, embossing can be performed with a pair of embossing rolls heating both or one embossing roll. When the embossing roll is heated! /, The embossing is given more clearly and clearly.

The heated embossing roll may be an elastic roll, but is preferably a metal roll. This is because the metal roll has better thermal conductivity and exhibits the effect of heating effectively, and when the metal roll is heated, it has an embossed shape. This is because heat is applied to the sheet in a corresponding manner, and the embossing force S applied becomes clearer and clearer.

In this case, the surface temperature of the heating roll is a pair of embossing roll forces, both of which are metal rolls, or a force that is a combination of an elastic roll and a metal roll, and any of the elastic roll and metal roll is heated. Regardless of force, etc., 40 to 140 ° C, preferably 60 to 120 ° C, more preferably 80 to 100 ° C. If the heating temperature is too low, the effect that the embossing becomes clear may not be sufficiently exhibited. On the other hand, if the heating temperature is too high, energy loss may occur, the sheet may be seized, and the manufactured sheet may become hard.

The embossing is applied so that the embossing pressure between the pair of embossing rolls is 5 to 30 kgf / cm, preferably 10 to 25 kgf / cm, more preferably 15 to 20 kgf / cm. If the embossing pressure is too low, the effect of clear embossing may not be fully demonstrated. On the other hand, if the embossing pressure is too high, the processed base paper may be torn. When the pair of embossing rolls is a combination of an elastic roll and a metal roll, the elastic roll preferably has a Shore hardness force of 40 to 70 on its surface. If the Shore hardness is too low, that is, if the elastic roll surface is too soft, the sheet or the sheet base may be broken. On the other hand, if the Shore hardness is too high, that is, if the surface of the elastic roll is too hard, embossing may not occur.

On the other hand, the specific shape of the emboss is an appropriate design matter. In the illustrated emboss of this embodiment, the shape of the top is square, and the shape of the recess between adjacent tops is a trapezoidal emboss. The shape of the top can be square, diamond, circle, ellipse or polygon.

Moreover, it is preferable that the top portion is flat if each sheet is bonded by an adhesive. Area of Ten咅(or, 0. l ~ 40mm ^2, more preferably (or 0. 25-4. 0 mm ^2, especially ί this preferred (or from 0.5 to 2. Is 0 mm ^2. Area of the top portion is narrower On the other hand, if the area of the top is too large, the volume of the absorption space due to embossing becomes small, so that sufficient absorption capacity cannot be obtained.

The depth D of emboss e, e… is also an appropriate design item. Force is approximately 1.0mm or more, preferably 1. It should be 3mm or more.

An emboss pattern formed by a large number of embosses e, e... Is also an appropriate design item, and conventionally known emboss patterns can be appropriately employed in consideration of aesthetics and functionality.

[0024] The form XI described above has a two-layer structure of only the front and back sheets 1 and 2, but it can have a multilayer structure of three or more layers. In this case, an intermediate layer is formed between the sheets constituting the front and back surfaces. It is preferable to provide a pulp layer. The pulp layer can be formed by interposing a pulp sheet between the front and back sheets. When the pulp layer is provided, the liquid retention is increased. When a pulp layer is provided, the pulp constituting the pulp layer is not limited, but it is desirable to use a pure pulp that does not contain fillers. In particular, it is desirable to use a pulp containing more NBKP than LBKP. That is, the ratio of NBKP: LBKP is set to 50:50 to 100: 0. Preferably, 70:30 to 100: 0. NBKP is stronger than LBKP Because the fiber thickness tends to be thicker, the more NBKP, the higher the bulk. In addition, the absorption rate of moisture and oil adhering to the front and back sheets increases, and the amount retained increases. In particular, the LBKP fiber length is 0.8 to 1.8 mm, the fiber thickness is 1.0 to 2 Odtex, and the NBKP fiber length is 2.5 to 4.5 mm, It is preferable to use pulp having a thickness of 3 · 0 to 4 · Odtex. NBKP fiber lash length of 2.5 to 4.5 mm and fiber lash thickness of 3.0 to 4. Odtex will increase the bulk and increase the water absorption rate and oil absorption rate. Also, if the fiber length of LBKP is 0.8 to 1.8 mm and the fiber thickness is 1.0 to 2. Odtex, it will be arranged so as to be properly entangled with the NBKP fiber and to fill the gap of the NBKP fiber. Strength and strength are improved, and moisture and oil retention are improved.

In the kitchen paper of the present invention described in detail above, the oil is sufficiently and quickly diffused on the surface sheet surface and is quickly moved to the gap between the sheets. Effectively retained and extremely excellent in oil absorption performance

[0025] The examples of the present invention, conventional examples (conventional products), and comparative examples were tested for oil absorption, oil penetration, oil absorption speed, and water absorption.

First, after measuring the weight of unused and dry kitchen paper, Place the kitchen paper on the vat and fry for 5 minutes with 170 ° C salad oil (Nisshin Oillio Group Co., Ltd.) on the spread kitchen paper (commercial frozen croquette; sold by AEON Co., Ltd. “TOPVALU Baron croquette” )) Was taken up and placed for 1 minute. After that, the fried food was removed and the weight of the kitchen paper was measured. The oil absorption was calculated by subtracting the weight of the unused dry state from this measured value. In each example, the top sheet was placed on the bat so that the top sheet was on the top, and the fried food was taken up on the top sheet.

For the amount of oil penetration, we measured the weight of the bat before placing the kitchen paper, and after removing the fried food and kitchen paper in the oil absorption test, we measured the weight of the bat again. The value obtained by subtracting the bat weight before placing the previous kitchen paper from this bat weight was used as the oil penetration amount.

The oil absorption rate was evaluated in three stages by dropping lcc salad oil (manufactured by Nisshin Oillio Group Co., Ltd.) on the side surface of the kitchen paper and visually observing it. Evaluation criteria are time force S until it can be seen that the glossiness (light) due to the dropped oil has disappeared from the sheet surface, 1 (bad) for 1 minute or more, 30 seconds to 1 minute 2 (normal) and 3 (good) for less than 30 seconds.

The amount of water absorption was measured after measuring the weight of a dry paper sample cut to 100 mm square, sufficiently immersing the paper sample in pure water, and then lifting the sample from pure water and measuring the weight after 30 seconds. The measured force was also the value obtained by subtracting the weight in the dry state as the amount of water absorption.

In each case, except for Comparative Example 3, the kitchen paper used for power was a two-layer structure in which the front and back sheets were bonded together with an adhesive. The adhesive in Examples and Conventional Examples is PVA. Also, except for Comparative Example 3, the sheet was made of thin paper on both sides, and the embossed shape was square in all examples.

Triglyceride was a medium chain fatty acid having 8 to 10 carbon atoms, the amount of rice was measured based on JIS P 8124, and the dry tensile strength was measured based on JIS P 8113.

In addition, the composition and test results of kitchen paper in each example are shown in Table 1.

[table 1]

As is clear from the results shown in Table 1, it can be seen that the examples of the present invention have a larger oil absorption than the comparative examples and the conventional examples.

In addition, the amount of oil penetration is very small compared to the conventional and comparative examples. It is. From this force, it can be considered that the structure of this example allows the oil to be quickly moved into the gap by the non-woven fabric surface sheet, and the oil to be effectively retained in the gap.

Regarding the oil absorption rate, it is recognized that the example of the present invention is superior to the comparative examples except the comparative example 3 and the conventional example. In Comparative Example 3, although the oil absorption amount and the oil absorption speed were fast, the oil was retained in the voids! /, NA! /, SE! /, Or a sticky surface was observed.

On the other hand, the amount of water absorption is higher than that of the comparative example and the conventional example. Also, the strength when wet is sufficient. In Comparative Example 3, although the amount of water absorption was large, the holding power was not enough and dripping of water was observed after the measurement.

As a result, it can be said that the examples of the present invention have the same or superior performance in terms of water absorption as the conventional examples, and that the oil absorption performance is excellent in each stage.

[0028] As described above, according to the present invention, a kitchen paper excellent in oil absorbability is provided.

Industrial applicability

[0029] In addition to kitchen paper, the present invention can be used for sheet-like materials for the purpose of wiping off oil.

Brief Description of Drawings

FIG. 1 is an enlarged cross-sectional view of a kitchen paper of the present invention.

Explanation of symbols

[0031] 1 ···· Top sheet, 2 ··· Back sheet, e ... emboss, t ... emboss top, XI ... kitchen

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Claims

The scope of the claims

[1] Kitchen paper made by laminating a plurality of sheets,

Kitchen paper characterized by that.

[2] The kitchenette according to claim 1, wherein the sheets constituting the front and back surfaces are sheets made of pulp.

[3] The kitchen paper according to claim 1 or 2, wherein the sheets constituting the front and back surfaces are embossed and the tops of the embosses applied to each sheet are adhered to each other.

[4] The kitchen paper according to claim 1 or 2, wherein the sheet constituting the front and back surfaces is embossed, and the top and bottom of the emboss applied to each sheet are adhered.

[5] The kitchen paper according to any one of claims 1 to 4, which has an adhesive area ratio power of 3 to 20% between the top sheet and the back sheet.

[6] The kitchen paper according to any one of claims 1 to 5, wherein the sheet constituting the surface is coated or impregnated with a triglyceride having 6 to 12 carbon atoms and 12 saturated carbon atoms.