JP2008190098A - Release agent and method for improving wet paper releasability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a functional composition enabling stable manufacturing of paper through being applied onto a press roll, and to provide a method for improving releasability using the composition. <P>SOLUTION: The functional composition, which is used by being applied to a press roll for dewatering wet paper, contains 2 mass% or more of a compound represented by general formula (1) [wherein, R is a 10-16C hydrocarbon group which may have a substituent; p and r are each an integer of 0-30, and q is an integer of 0-2, wherein the sum of p and r is an integer of 6-30, and p, q and r are each not 0 at the same time]. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a functional composition and a method for improving the peelability of wet paper using the functional composition.

  The paper making process for producing paper is generally performed by placing a liquid in which pulp is dispersed in water on a paper making net (wire) and letting the excess water fall naturally to make wet paper and wet paper. Passing between a pair of press rolls and pressing with a press roll through a felt, the moisture in the wet paper is transferred to the felt, thereby dehydrating the wet paper, and the wet paper that has passed through the press part. And a dryer part which is dried by bringing it into contact with a heated drum and forms paper, and a reel part which winds the paper on a rod called a spool.

  However, in the conventional press part, in order to rotate the press roll at a high speed, the wet paper does not peel from the press roll after passing through a point where the wet paper is pressed by the press roll (hereinafter referred to as “pressing point”). The press roll may rotate while adhering.

Specifically, as shown in FIG. 5, the wet paper is pressed at a pressing point P, peeled off from the surface of the press roll, and conveyed.
If the wet paper is not peeled off from the surface of the press roll, an excessive tension is applied to the wet paper, resulting in a situation where paper habits deteriorate or the paper is cut.

  On the other hand, in the press part, a doctor blade for removing foreign matter adhering to the surface of the press roll is generally placed in contact with the press roll on the side in contact with the wet paper.

  However, since the press roll rotates at a high speed, the contact portion between the doctor blade and the press roll may be worn by friction between the doctor blade and the press roll, and a gap may be formed between the doctor blade and the press roll. . This is particularly noticeable when the doctor blade is made of carbon.

In this case, since the foreign matter on the surface of the press roll is not sufficiently removed, the wet paper is pressed by the press roll together with the foreign matter, resulting in a defect such as a hole in the wet paper.
From these things, there exists a problem that the stable manufacture cannot be performed in the conventional papermaking process.

In response to these problems, a method of applying a drug to the press roll has been proposed.
For example, during the papermaking process, in the press part of the dewatering section of the wet paper, the wet roll is peeled off from the stone roll by pouring a stone roll antifouling agent containing a predetermined component as an active ingredient onto the surface of the stone roll or felt. There has been disclosed a method for improving the peelability of wet paper from a stone roll, which is remarkably improved and productivity is improved (see Patent Document 1).

In addition, a papermaking press step in which a wet paper containing a large amount of water is sandwiched between a pair of press rolls to dehydrate the wet paper, and a doctor blade is pressed against the press roll to remove deposits on the press roll. Discloses a doctor blade wear prevention method in which a fluorine organic compound having a predetermined structure is adhered to the press roll (see Patent Document 2).
JP-A-11-217787 JP-A-2005-273026

However, according to the method described in Patent Document 1, the peelability of the wet paper from the press roll is improved, but it is not sufficient.
In addition, the wear of the doctor blade is also insufficient.

  On the other hand, according to the method described in Patent Document 2, although abrasion of the doctor blade can be relatively suppressed, the peelability of the wet paper from the press roll is insufficient.

Therefore, the method described in Patent Document 1 or 2 does not satisfy both the peelability of the wet paper to the press roll and the lubricity of the doctor blade.
That is, in the method described in Patent Document 1 or 2, the releasability cannot be maintained, so the paper is cut or the doctor blade is worn out because the lubricity is insufficient, and the foreign matter tends not to be sufficiently removed. .
For this reason, stable production is difficult with the method described in Patent Document 1 or 2.

  This invention is made | formed in view of the subject which the said prior art has, The functional composition in which stable manufacture is possible by giving to a press roll, and the peelable improvement method of a wet paper using the same The purpose is to provide.

［式（１）中、Ｒは置換基を有していてもよい炭素数１０〜１６の炭化水素基を示し、ｐ，ｒはそれぞれ独立に０〜３０の整数を示し、ｑは０〜２の整数を示す。但し、ｐとｒとの和が６〜３０の整数であり、前記ｐ,ｑ,ｒは同時に０とはならない。］ The functional composition of the present invention that solves the above problems is used by being applied to a press roll for dehydrating a wet paper, and contains 2% by mass or more of a compound represented by the following general formula (1). It is characterized by.

[In the formula (1), R represents an optionally substituted hydrocarbon group having 10 to 16 carbon atoms, p and r each independently represents an integer of 0 to 30, and q represents 0 to 2 Indicates an integer. However, the sum of p and r is an integer of 6 to 30, and the p, q, and r are not 0 at the same time. ]

When this functional composition is applied to a press roll for dehydrating the wet paper, the peelability of the wet paper to the press roll is improved.
As a result, even when the press roll rotates at high speed, the wet paper web is peeled off smoothly, and paper breakage is suppressed because no excessive tension is applied to the paper.

In addition to this, since the lubricity of the surface of the press roll is improved, wear due to friction between the doctor blade and the press roll is suppressed.
Therefore, the contact between the doctor blade and the press roll is abraded by the friction between the doctor blade and the press roll, and the generation of a gap between the doctor blade and the press roll is suppressed.

In addition, since the wear of the doctor blade is suppressed, foreign matters on the surface of the press roll are sufficiently removed, and occurrence of problems such as a hole in the wet paper can be suppressed.
Furthermore, since the wear of the doctor blade is suppressed, the frequency of replacement of the doctor blade can be reduced.

  Therefore, according to the functional composition of the present invention, when applied to the press roll, the peelability of the wet paper from the press roll can be improved and the wear of the doctor blade can be suppressed. For this reason, stable production becomes possible.

As described above, the reason why the above-described effects can be obtained by applying the functional composition to the press roll in this case is not clear, but since the surface tension of water decreases, It is presumed that a film with reduced wet paper adhesion is formed.
The factor is not limited to this.

  In the functional composition, the sum of p and r is preferably an integer of 6 to 20, R is a hydrocarbon group having 12 to 15 carbon atoms, and the sum of p and r is 8 to 20. More preferably, it is an integer.

The functional composition preferably further contains a water-soluble polymer.
In this case, when the functional composition is applied to the press roll, the water-soluble polymer is formed into a film on the surface of the press roll together with the compound represented by the general formula (1). Even if it exists, the high peelability to the press roll of a wet paper can be maintained.

この場合、ドクターブレードとプレスロールとの間の摩擦がより低減されるため、ドクターブレードの摩耗がより抑制される。 In the functional composition, the content ratio of the ethylene oxide group represented by the following general formula (2) with respect to the molecular weight of the compound represented by the general formula (1) is preferably 30% by mass or more.

In this case, since friction between the doctor blade and the press roll is further reduced, wear of the doctor blade is further suppressed.

In the functional composition, the mixing ratio of the compound represented by the general formula (1) and the water-soluble polymer is preferably 1: 0.1 to 1:10 by mass ratio.
In this case, a more uniform film is formed when the mixing ratio of the compound represented by the general formula (1) and the water-soluble polymer is within the above range in terms of mass ratio.

  In the above functional composition, it is preferable that the press roll includes a doctor blade for removing foreign substances adhering to the surface.

It is preferable that the functional composition is a release agent that improves the peelability of the wet paper from a press roll.
Moreover, it is preferable that the said functional composition is an abrasion inhibitor which improves the lubricity of a doctor blade and a press roll.

In these cases, by applying the functional composition to the press roll, it is possible to reliably improve the peelability of the wet paper from the press roll and to reliably suppress the wear of the doctor blade.
For this reason, more stable manufacture is attained.

The wet paper peelability improving method of the present invention is characterized by using the functional composition described above.
According to this invention, since the functional composition mentioned above is used, the peelability of wet paper can be improved by giving a functional composition to the press roll which contacts wet paper.

  According to the present invention, by applying to a press roll, it is possible to improve the peelability of the wet paper from the press roll and to suppress the wear of the doctor blade, and thus a functional composition capable of stable production, and the same It is possible to provide a method for improving peelability using

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.
In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified.
Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

The functional composition of the present invention contains a compound represented by the following general formula (1).

Here, in formula (1), R represents an optionally substituted hydrocarbon group having 10 to 16 carbon atoms, p and r each independently represents an integer of 0 to 30, and q is 0. An integer of ~ 2 is shown.
However, the sum of p and r is an integer of 6 to 30, and the p, q, and r are not 0 at the same time.

Examples of the hydrocarbon group having 10 to 16 carbon atoms include linear, branched or cyclic hydrocarbon groups, aryl groups such as phenyl groups and naphthyl groups.
If the carbon number is less than 10, the surface tension tends to be high and the film tends not to be sufficiently formed. If the carbon number exceeds 16, it is difficult to uniformly disperse in water. There is a tendency not to be.

Moreover, the functional composition of this invention may contain 2 or more types of compounds from which carbon number differs in the compound represented by General formula (1).
In addition, it is more preferable that the said carbon number is a 12-15 hydrocarbon group.

Examples of the substituent include an aryl group such as a phenyl group or a naphthyl group, a halogen group, an amino group, an alkylamino group, a carbonyl group, an ester group, a sulfonyl group, a nitro group, and an alkylene oxide group.
In addition, it is preferable that the said hydrocarbon group does not have a substituent.

  The sum of the above p and r is preferably an integer of 6 to 30, more preferably an integer of 6 to 20, and still more preferably an integer of 8 to 20, from the viewpoint of water compatibility. More preferably, it is an integer of 9-16.

Q is preferably an integer of 0 to 2, more preferably 0.
That is, when q is 0, the compound is represented by the following general formula (3).

  Among these, the compound represented by the general formula (1) is more preferably polyoxyethylene lauryl ether, polyoxyethylene tridecyl ether, polyoxyethylene myristyl ether, or polyoxyethylene pentadecyl ether.

When the functional composition is applied to a press roll for dehydrating the wet paper, the peelability of the wet paper to the press roll is improved.
As a result, even when the press roll rotates at high speed, the wet paper web is peeled off smoothly, and paper breakage is suppressed because no excessive tension is applied to the paper.

In addition to this, since the lubricity of the surface of the press roll is improved, wear due to friction between the doctor blade and the press roll is suppressed.
Therefore, the contact between the doctor blade and the press roll is abraded by the friction between the doctor blade and the press roll, and the generation of a gap between the doctor blade and the press roll is suppressed.

Therefore, by applying the functional composition in this case to the press roll, it is possible to improve the peelability of the wet paper from the press roll and to suppress wear of the doctor blade.
For this reason, stable production becomes possible.

In the compound represented by the general formula (1), the functional composition of the present invention preferably further contains a water-soluble polymer.
In this case, when the functional composition is applied to the press roll, the water-soluble polymer is formed into a film on the surface of the press roll together with the compound represented by the general formula (1). Even if it exists, the high peelability to the press roll of a wet paper can be maintained.
Further, by applying the functional composition to the press roll, it is possible to further improve the peelability of the wet paper from the press roll and to further suppress the wear of the doctor blade.
For this reason, more stable manufacture is attained.

The water-soluble polymer is preferably cationic, amphoteric or nonionic, and more preferably cationic or amphoteric.
These water-soluble polymers may be used alone or in combination of two or more.
The amphoteric water-soluble polymer can be obtained by polymerizing a cationic monomer and an anionic monomer.
In this case, there is an advantage that wet paper peelability is further improved.

Examples of the cationic water-soluble polymer include polydiallyldimethylammonium, polydiallyldimethylammonium chloride, dicyandiamide-formaldehyde condensate, and epichlorohydrin-dimethylamine condensate.
The cationic water-soluble polymer is obtained by polymerizing a halogenated amine derivative having a polymerizable functional group that is a cationic monomer and a monomer having an ethylenic double bond that is a nonionic monomer. The obtained polymer may be sufficient.

Examples of the halogenated amine derivative having a polymerizable functional group include (meth) acrylic acid 2- (N, N-dimethylamino) ethylbenzine chloride salt, (meth) acrylic acid 2- (N, N-dimethylamino). An ethyl chloride salt etc. are mentioned.
Examples of the monomer having an ethylenic double bond include ethylene glycol mono (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol mono (meth) acrylate, diethylene glycol di (meth) acrylate, and triethylene glycol mono (meta). ) Acrylate, triethylene glycol di (meth) acrylate, propylene glycol mono (meth) acrylate and the like.
These monomers may be used alone or in combination of two or more.

As the amphoteric water-soluble polymer, a halogenated amine derivative having a polymerizable functional group which is a cationic monomer and a carboxylic acid derivative having a polymerizable functional group which is an anionic monomer are polymerized. The polymer obtained by is mentioned.
When the cationic monomer and the anionic monomer are polymerized, the above-described nonionic monomer may be polymerized at the same time.

As the halogenated amine derivative having a polymerizable functional group, the same ones as described above are used.
Examples of the carboxylic acid derivative having a polymerizable functional group include (meth) acrylic acid.
These monomers may be used alone or in combination of two or more.

In the functional composition, the content of the compound represented by the general formula (1) is preferably 2% by mass or more, and preferably 2 to 30% by mass with respect to the total amount of the functional composition. More preferred.
In this case, it is possible to improve the peelability of the wet paper from the press roll and to suppress the wear of the doctor blade.
In addition, when a content rate exceeds 30 mass%, an effect will not improve.

In the functional composition, the content of the ethylene oxide group represented by the following general formula (2) with respect to the molecular weight of the compound represented by the general formula (1) is preferably 30% by mass or more, and 90% by mass. The following is preferable.

  When the content ratio of the ethylene oxide group is less than 30% by mass, the film strength tends to be insufficient compared to the case where the content ratio of the ethylene oxide group is in the above range, and the content ratio of the ethylene oxide group is When it exceeds 90% by mass, the coating tends not to be sufficiently fixed to the press roll as compared with the case where the content ratio of the ethylene oxide group is in the above range.

  In the functional composition, the mixing ratio of the compound represented by the general formula (1) and the water-soluble polymer is preferably 1: 0.1 to 1:10 by mass ratio, and 1: 0.25. More preferably, it is ˜1: 4.

  When the mass ratio of the water-soluble polymer to the functional composition 1 is less than 0.1, the film tends not to be sufficiently maintained as compared with the case where the mass ratio is in the above range. When the mass ratio of the water-soluble polymer to 10 exceeds 10, the tackiness increases as compared with the case where the mass ratio is in the above range, and thus the peelability tends to decrease.

In the functional composition of the present invention, the surface tension of the compound represented by the general formula (1) is preferably 25 to 40 mN / m.
In this case, the functional composition can be applied more uniformly on the surface of the press roll.

  In addition to the compound represented by the general formula (1) and the water-soluble polymer, the functional composition of the present invention includes a chelating agent, a pH adjuster, a preservative, a dispersant, a viscosity adjuster, a solid lubricant, and the like. An additive may be included.

Next, the dewatering process of the wet paper using the functional composition described above will be described.
The functional composition is used in a paper machine comprising a felt, a pair of press rolls for pressing the wet paper through the felt, and a doctor blade that contacts the press roll on the side in contact with the wet paper. It is done.

FIG. 1 is an explanatory diagram for explaining an example of the configuration of a press part of a paper machine in which the functional composition of the present invention is used.
As shown in FIG. 1, the press part 100 includes a first press part A and a second press part B, and the wet paper web is dehydrated in two places in the first press part A and in one place in the second press part B. Is done.

The first press section A is provided with a central press roll 10 (hereinafter referred to as “center roll”), and the first press section P1 and P2 on the surface of the center roll allow the wet paper to be pressed. A press roll 11 and a second press roll 12 are provided.
In other words, the center roll 10 and the first press roll 11 can press the wet paper at the pressing point P1, and the center roll 10 and the second press roll 12 can press the wet paper at the pressing point P2. It is like that.

On the other hand, the second press section B is provided with an upper press roll 15 (hereinafter referred to as “top roll”), and a third press so that the wet paper can be pressed at the pressing point P3 on the top roll 15 surface. A press roll 13 is provided.
In other words, the top roll 15 and the third press roll 13 can press the wet paper at the pressing point P3.

  The wet paper 30 passes between the center roll 10 and the first press roll 11 of the first press part A and between the center roll 10 and the second press roll 12, and then the top roll 15 of the second press part B and It arrange | positions so that it may pass between the 3rd press rolls 13.

Further, when the wet paper 30 is pressed at the press points P1, P2, and P3, the wet paper 30 is pressed through the felts 21, 22, and 23 between the press rolls.
That is, the felt 21 is disposed between the center roll 10 and the first press roll 11 and comes into contact with the first press roll 11.
Further, the felt 22 is disposed between the center roll 10 and the second press roll 12 and comes into contact with the second press roll 12.
Further, the felt 23 is disposed between the top roll 15 and the third press roll 13 and is in contact with the third press roll 13.

Therefore, when the wet paper 30 passes through the first press part A, it comes into contact with the center roll 10, and when it passes through the second press part B, it comes into contact with the top roll 15.
These felts 21, 22, and 23 are movable together with the wet paper, and can absorb moisture in the wet paper when the wet paper is pressed.

The press part 100 includes doctor blades 10 a and 15 a that are in contact with the press rolls (center roll 10 and top roll 15) that are in contact with the wet paper 30.
That is, the center roll 10 is in contact with the doctor blade 10a, and the top roll 15 is in contact with the doctor blade 15a.

These doctor blades 10 a and 15 a can remove foreign matters such as separated matter from the wet paper 30 attached to the surfaces of the center roll 10 and the top roll 15.
The press part 100 includes spray nozzles 10b and 15b for applying the functional composition of the present invention to the press rolls (center roll 10 and top roll 15) on the side in contact with the wet paper 30.
That is, the functional composition of the present invention described above is used by being applied to a press roll for dehydrating wet paper.

The spray nozzles 10b and 15b are both provided on the downstream side of the positions where the doctor blades 10a and 15a are provided with respect to the rotation directions R1 and R2 of the center roll 10 and the top roll 15.
Thus, by providing the spray nozzles 10b and 15b downstream of the doctor blades 10a and 15a, there is an advantage that uniform formation of the peelable film and excess functional composition can be removed.

  Here, as the spray nozzles 10b and 15b, uniform fan type nozzles, wide angle fan type nozzles, single fan type nozzles, empty cone nozzles, full cone type nozzles, full cone type nozzles, straight nozzles, and the like are used.

When the wet paper 30 enters the press part 100, the wet paper 30 is pressed at the pressing point P1 by the center roll 10 and the first press roll 11 through the felt 21 in the first press part A.
Then, since the moisture in the wet paper 30 is absorbed by the felt 21, the wet paper 30 is dehydrated.

Next, the wet paper 30 is pressed by the center roll 10 and the second press roll 12 through the felt 22 at the pressing point P2.
Then, since the moisture in the wet paper 30 is absorbed by the felt 22, the wet paper 30 is further dehydrated.

Then, the wet paper 30 is peeled from the center roll 10 and conveyed to the second press part B.
At this time, the foreign matter separated from the wet paper 30 is removed by the doctor blade 10a.

The wet paper 30 conveyed to the second press part B is pressed at the pressing point P3 by the top roll 15 and the third press roll 13 through the felt 23.
Then, since the moisture in the wet paper 30 is absorbed by the felt 23, the wet paper 30 is further dehydrated.

The wet paper 30 is peeled off from the top roll 15 and sent to a dryer part (not shown) and dried.
The foreign matter separated from the wet paper 30 is removed by the doctor blade 15a.

  In this way, in the press part 100, the wet paper is dehydrated by passing the wet paper through the felt between the pair of press rolls.

  Moreover, the peeling property of a wet paper can be improved by providing the functional composition mentioned above to the press roll which contacts a wet paper.

  Furthermore, wear of the doctor blade can be suppressed by applying the functional composition described above to a press roll in contact with the doctor blade for removing foreign matter adhering to the surface.

  That is, the functional composition can function as a release agent that improves the peelability of the wet paper from the press roll and / or an abrasion inhibitor that improves the lubricity between the doctor blade and the press roll.

As described above, by applying the functional composition to the press roll, it is possible to reliably improve the peelability of the wet paper from the press roll and to reliably suppress the wear of the doctor blade.
For this reason, more stable manufacture is attained.

  In addition, when the wet paper is peeled off from the surface of the press roll by applying tension in the length direction of the wet paper (hereinafter referred to as “drawing”) in order to peel the wet paper from the press roll, the functionality of the present invention. Since the press roll to which the composition is applied has improved peelability of the wet paper from the press roll, the draw can be loosened.

Therefore, it is possible to suppress the end face of the wet paper web from being shrunk inward due to excessive drawing or from being cut.
Note that when the end face of the wet paper shrinks inward, the paper structure itself is distorted, and color misregistration occurs when used as printing paper.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, in the above embodiment, when the wet paper 30 is passed between the press rolls, one surface is brought into contact with the felt, but the felt may be brought into contact with both surfaces of the wet paper 30.

  Moreover, in this embodiment, although one press roll which contact | connects wet paper among a pair of press rolls is equipped with a doctor blade, both of a pair of press rolls may be equipped with a doctor blade.

  EXAMPLES Hereinafter, although this invention is demonstrated more concretely based on an Example and a comparative example, this invention is not limited to a following example.

(Example 1)
[Preparation of functional composition]
In 80% by mass of water, a compound represented by the following general formula (1) (ethylene oxide group content: 55% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 6, q = 1 , Surface tension 26.9 mN / m) (hereinafter referred to as “Compound A” for convenience) and 10% by weight of a cationic water-soluble polymer were added to obtain a functional composition.

  The cationic water-soluble polymer is composed of (meth) acrylic acid 2- (N, N-dimethylamino) ethylbenzine chloride salt which is a cationic monomer and ethylene glycol mono (meta) which is a nonionic monomer. ) Acrylate is mixed at a mass ratio of 1: 1 and radically polymerized.

(Example 2)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 59% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 7, q = 1, A functional composition was obtained in the same manner as in Example 1 except that a surface tension of 27.0 mN / m) was used.

(Example 3)
Instead of the compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 62 mass%, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 8, q = 1, A functional composition was obtained in the same manner as in Example 1 except that a surface tension of 27.0 mN / m) was used.

Example 4
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 65% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 9, q = 1, A functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.5 mN / m).

(Example 5)
Instead of the compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 75 mass%, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 15, q = 1, A functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.5 mN / m).

(Example 6)
Instead of the compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 77% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 16, q = 1, A functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.5 mN / m).

(Example 7)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 79% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 17, q = 1) A functional composition was obtained in the same manner as in Example 1 except that was used.

(Example 8)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 82% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 20, q = 1) A functional composition was obtained in the same manner as in Example 1 except that was used.

Example 9
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 82% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl), p + r = 21, q = 1) A functional composition was obtained in the same manner as in Example 1 except that was used.

(Example 10)
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 70% by mass, R is a hydrocarbon having 9 carbon atoms (straight chain nonyl), p + r = 10, q = 1 ) Was used in the same manner as in Example 1 except that a functional composition was obtained.

(Example 11)
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 67% by mass, R is a hydrocarbon having 10 carbon atoms (branched decyl) and 12 carbon atoms (straight chain dodecyl)) A functional composition was obtained in the same manner as in Example 1 except that p + r = 10, q = 1) was used.

(Example 12)
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 62 mass%, R is a hydrocarbon having 12 carbon atoms (straight chain dodecyl), p + r = 7, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.8 mN / m).

(Example 13)
Instead of compound A, the compound represented by the above general formula (1) (content ratio of ethylene oxide group: 66% by mass, R is a hydrocarbon having 12 carbon atoms (straight chain dodecyl), p + r = 8, q = 0 A functional composition was obtained in the same manner as in Example 1 except that the surface tension was 28.5 mN / m).

(Example 14)
Instead of compound A, the compound represented by the above general formula (1) (ethylene oxide group content: 70% by mass, R is a hydrocarbon having 12 carbon atoms (linear dodecyl), p + r = 10, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 31.0 mN / m).

(Example 15)
Instead of compound A, the compound represented by the above general formula (1) (content ratio of ethylene oxide group: 81% by mass, R is a hydrocarbon having 12 carbon atoms (straight chain dodecyl), p + r = 18, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 39.0 mN / m).

(Example 16)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 64% by mass, R is a hydrocarbon having 13 carbon atoms (linear tridecyl), p + r = 8, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.5 mN / m).

(Example 17)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 69% by mass, R is a hydrocarbon having 13 carbon atoms (linear tridecyl), p + r = 10, q = 0 A functional composition was obtained in the same manner as in Example 1 except that the surface tension was 27.9 mN / m).

(Example 18)
Instead of compound A, the compound represented by the above general formula (1) (ethylene oxide group content: 73% by mass, R is a hydrocarbon having 13 carbon atoms (linear tridecyl), p + r = 12, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 31.3 mN / m).

(Example 19)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 82% by mass, R is a hydrocarbon having 13 carbon atoms (linear tridecyl), p + r = 20, q = 0 The functional composition was obtained in the same manner as in Example 1 except that the surface tension was 36.3 mN / m).

(Example 20)
Instead of compound A, compound represented by the above general formula (1) (ethylene oxide group content: 57% by mass, R is carbon number 14 (linear tetradecyl) and carbon number 15 (linear pentadecyl) carbonization) A functional composition was obtained in the same manner as in Example 1 except that a mixture of hydrogen, a mixture of p + r = 8 and 9, q = 1, surface tension 32.0 mN / m) was used.

(Example 21)
Instead of compound A, a compound represented by the above general formula (1) (content ratio of ethylene oxide group: 59% by mass, R is carbonized with 14 carbon atoms (linear tetradecyl) and 15 carbon atoms (linear pentadecyl) A functional composition was obtained in the same manner as in Example 1 except that a mixture of hydrogen, p + r = 9, q = 1, and surface tension 32.5 mN / m) was used.

(Example 22)
Instead of compound A, compound represented by the above general formula (1) (ethylene oxide group content: 64% by mass, R is carbonized with 14 carbon atoms (linear tetradecyl) and 15 carbon atoms (linear pentadecyl) A functional composition was obtained in the same manner as in Example 1 except that a mixture of hydrogen, p + r = 11, q = 1, and surface tension 34.0 mN / m) was used.

(Example 23)
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 67% by mass, R is carbonized with 14 carbon atoms (linear tetradecyl) and 15 carbon atoms (linear pentadecyl) A functional composition was obtained in the same manner as in Example 14 except that a mixture of hydrogen, p + r = 13, q = 1, and surface tension 35.0 mN / m) was used.

(Example 24)
Instead of compound A, a compound represented by the above general formula (1) (ethylene oxide group content: 70% by mass, R is carbon number 14 (linear tetradecyl) and carbon number 15 (linear pentadecyl) carbonization) A functional composition was obtained in the same manner as in Example 14 except that a mixture of hydrogen, p + r = 15, q = 1, and surface tension of 37.0 mN / m was used.

(Example 25)
Instead of compound A, the compound represented by the above general formula (1) (content ratio of ethylene oxide group: 61% by mass, R is a hydrocarbon having 16 carbon atoms (straight hexadecyl), p + r = 10, q = 1 ) Was used in the same manner as in Example 14 except that a functional composition was obtained.

(Example 26)
Instead of compound A, the compound represented by the above general formula (1) (ethylene oxide group content: 60% by mass, R is carbonized with 16 carbon atoms (linear hexadecyl) and 18 carbon atoms (linear octadecyl) A functional composition was obtained in the same manner as in Example 14 except that a mixture of hydrogen, p + r = 10, q = 1) was used.

(Example 27)
A functional composition was obtained in the same manner as in Example 23 except that the amphoteric water-soluble polymer was used instead of the cationic water-soluble polymer.
The amphoteric water-soluble polymer is a cationic monomer (meth) acrylic acid 2- (N, N-dimethylamino) ethylbenzine chloride salt, an anionic monomer methacrylic acid, and nonionic. A monomer, ethylene glycol mono (meth) acrylate, is mixed at a mass ratio of 5: 2: 3 and radically polymerized.

(Example 28)
A functional composition was obtained in the same manner as in Example 1 except that the amount of Compound A added was 2% by mass.

(Example 29)
A functional composition was obtained in the same manner as in Example 1 except that the amount of Compound A added was 30% by mass.

(Comparative Example 1)
A functional composition was obtained in the same manner as in Example 1 except that alkyldimethylbenzalkonium chloride was used in place of Compound A.

(Comparative Example 2)
A functional composition was obtained in the same manner as in Example 1 except that Compound A was not used.

(Comparative Example 3)
A functional composition was obtained in the same manner as in Example 1 except that the amount of Compound A added was 1% by mass.

(Evaluation methods)
In the press part of the paper machine shown in FIG. 1, the functional compositions obtained in Examples 1 to 29 and Comparative Examples 1 to 3 are applied to a center roll (press roll), and the wet paper peelability and doctor blade The wear resistance of the steel was investigated. The operating conditions of the actual machine used in the test are as follows.
Papermaking varieties: Coated paper basis weight: 44 g / m ²
Paper width: 5m
Center roll rotation speed: 1100 m / min
Center roll material: Ceramic spray roll Doctor blade material: Carbon doctor blade linear pressure: 350 g / cm
Top roll rotation speed: 1140 m / min
Top roll material: Ceramic sprayed roll Functional composition: 25 cc / min
Application amount of water to the center roll: 50 L / min

[Real machine peelability]
FIG. 2 is an explanatory diagram for explaining an actual machine peelability test.
As shown in FIG. 2, in a state where the functional composition is not applied, when the press roll is operated at a predetermined speed S1, the wet paper 30 is peeled off at the separation point T1.
On the other hand, in a state where each functional composition is applied, when the press roll is operated at the same speed S1, the wet paper 30 is peeled off at the separation point T2.
Since the separation point swings up and down during operation, the position that becomes the center of the deflection is defined as the separation point.

Next, the operating speed is decreased in a state where each functional composition is applied.
If it does so, the force at the time of taking a draw will become weak, and the leaving point T2 will transfer to the direction of the leaving point T1 gradually.
Then, the speed S2 when the leaving point T2 and the leaving point T1 coincide is measured.
The difference between the speed S1 and the speed S2 was defined as the peelability.
The obtained results are shown in Table 1.

[Abrasion]
In addition, in the state where each functional composition was applied, the wear amount of the doctor blade when the actual machine was operated for two weeks was measured by converting it per day.
The results are shown in Table 1.
In addition, the abrasion amount at the time of providing only water (blank) is set to 100, and the abrasion property of each Example is shown by a standard value (relative value with respect to a blank).

[Wet paper peelability]
Next, a wet paper peelability test was performed as an auxiliary test showing the effect of the functional composition of the present invention.
The method will be described below with reference to the drawings.

FIGS. 3A and 3B are explanatory diagrams for explaining the wet paper web peelability test.
As shown in FIG. 3, 5 cc of each functional composition diluted 2000 times with water was applied to the entire upper surface of the ceramic spray plate 51.

Next, the wet paper 30 was placed on the ceramic sprayed plate 51, and the felt 52 was placed on the wet paper 30 to obtain a laminate.
And this laminated body was pressed with the metal press roll 53, and the laminated body was moved to the horizontal direction so that the whole wet paper 30 might be pressed by the uniform pressure.

As a result, the wet paper 30 was dehydrated.
The ratio (dryness) of the weight of the wet paper 30 from which the moisture was removed from the wet paper was about 38%.

  Next, a hook 54 with a wire was attached to the end of the wet paper web 30, the hook 54 with a wire was hooked on a horizontally movable pulley, and the tip of the wire was connected to a load cell 55 (manufactured by Kyowa Denki Co., Ltd.).

Then, the pulley was moved, and the wet paper 30 was peeled from the ceramic sprayed plate 51 while maintaining a constant angle (θ = 15 °) when the wet paper actually left the actual machine.
At that time, the peeling force indicated by the load cell 55 was measured.
The obtained results are shown in Table 1.
In addition, the peeling force at the time of giving only water (blank) to the ceramic sprayed board 1 is set to 100, and the peeling force of each Example is shown by a standard value (relative value with respect to a blank).

[Dynamic friction force measurement]
Next, a test was conducted to confirm the effect of the functional composition of the present invention to reduce the dynamic friction force.
FIG. 4 is an explanatory diagram for explaining the dynamic friction force measurement test.
As shown in FIG. 4, 5 cc of a functional composition diluted 2000 times with water was applied to the entire surface of the ceramic sprayed plate 1.

  Next, the carbon spray blade 56 and the load cell 55 which were set up at a certain angle (α = 30 °) with the ceramic sprayed plate 51 were connected by a wire, and the load cell 55 and the motor 57 were connected by a wire.

Then, the load cell 55 was pulled by the motor 57, and the dynamic friction force exhibited by the load cell 55 was measured while the carbon doctor blade 56 was sliding on the ceramic sprayed plate 51.
The obtained results are shown in Table 1.
In addition, the dynamic friction force at the time of giving only water to the ceramic sprayed plate 51 is set to 100, and the dynamic friction force of each Example is shown by a standard value (relative value with respect to a blank).

  As is clear from the results shown in Table 1, according to the functional compositions of Examples 1 to 29, compared with the functional compositions of Comparative Examples 1 to 3, actual peelability, abrasion, wet paper It was found that both the peelability and the dynamic friction force were excellent.

  From this, according to the present invention, by applying to the press roll, it is possible to improve the peelability of the wet paper from the press roll and to suppress the wear of the doctor blade, so that a functional composition that enables stable production is possible. It was confirmed that a method for improving the peelability of a product and wet paper using the product can be provided.

FIG. 1 is an explanatory diagram for explaining an example of the configuration of a press part of a paper machine in which the functional composition of the present invention is used. FIG. 2 is an explanatory view for explaining an actual machine peelability test in Examples. 3A and 3B are explanatory diagrams for explaining a wet paper peelability test in Examples. FIG. 4 is an explanatory diagram for explaining the dynamic friction force measurement test. FIG. 5 is an explanatory diagram for explaining wet paper peelability in a press roll.

Explanation of symbols

10 ... Center roll (press roll)
10a, 15a, 56 ... Doctor blades 10b, 15b ... Spray nozzles 11, 12, 13, 53 ... Press roll 15 ... Top roll (press roll)
21, 22, 23, 52 ... felt 30 ... wet paper 51 ... ceramic sprayed plate 54 ... hook 55 with wire ... load cell 57 ... motor 100 ... press part A ... first press part B ... second press part P, P1, P2 , P3 ... Pressing point Q ... Points R1, R2 ... Rotational directions T1, T2 ... Leaving points

Claims (10)

A functional composition characterized by containing 2% by mass or more of a compound represented by the following general formula (1), which is used by being applied to a press roll for dehydrating a wet paper.

[In the formula (1), R represents an optionally substituted hydrocarbon group having 10 to 16 carbon atoms, p and r each independently represents an integer of 0 to 30, and q represents 0 to 2 Indicates an integer. However, the sum of p and r is an integer of 6 to 30, and the p, q, and r are not 0 at the same time. ]   The functional composition according to claim 1, wherein the sum of p and r is an integer of 6 to 20.   2. The functional composition according to claim 1, wherein R is a hydrocarbon group having 12 to 15 carbon atoms, and the sum of p and r is an integer of 8 to 20.   The functional composition according to claim 1, further comprising a water-soluble polymer. The functional composition according to claim 1, wherein the content of the ethylene oxide group represented by the following general formula (2) with respect to the molecular weight of the compound represented by the general formula (1) is 30% by mass or more. object.

  The functional composition according to claim 4, wherein a mixing ratio of the compound represented by the general formula (1) and the water-soluble polymer is 1: 0.1 to 1:10 by mass ratio. .   The functional composition according to claim 1, wherein the press roll includes a doctor blade for removing foreign substances adhering to the surface.   The functional composition according to claim 1, wherein the functional composition is a release agent that improves the peelability of the wet paper from the press roll.   The functional composition according to claim 7, wherein the functional composition is an abrasion inhibitor that improves lubricity between the doctor blade and the press roll.   A method for improving the peelability of a wet paper, comprising using the functional composition according to any one of claims 1 to 9.

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