JP4934970B2 - Textile structure and manufacturing method thereof - Google Patents

Description

  The present invention relates to a fiber structure made of, for example, paper or cellulose, and more particularly to a fiber structure that can improve water resistance and oil resistance without using a fluorine-based oil resistant agent and a method for producing the same.

  Conventionally, as a method for imparting oil resistance and water resistance to a fiber structure such as paper, a fluorine-based oil resistant agent has been used for many years. When applied to the paper surface, the fluorinated oil resistance agent modifies the surface tension of the surface fiber of the paper to be lower than the surface tension of liquids such as general oils and fats, that is, repels water and oil. By preventing the liquid from getting wet, the liquid is prevented from penetrating into the fiber of the paper.

  However, recent research has revealed that fluorinated oil resistance agents for fiber treatment, which have been used for general purposes, are chemical substances accumulating in living organisms. For this reason, several major manufacturers have begun to review the production of fluorine-based oilproofing agents.

  On the other hand, as a technique for imparting oil resistance and water resistance without using a fluorinated oil resistant agent, there is an oil resistant paper obtained by bonding a plastic film such as polyethylene (PE) or polypropylene (PP) to paper (for example, patents). Reference 1). In addition, there is a method in which a film is formed by applying an acrylic resin to impart oil resistance and water resistance.

Patent documents are as follows.
Japanese Utility Model Publication No. 6-32027

  However, although fiber structures such as oil-resistant paper bonded with polyethylene as described above are low in cost, it is difficult to recycle them as paper.

  The method of applying the acrylic resin has a problem that the flexibility is poor, and there is a problem that the acrylic resin film is cracked when it is bent and the oil resistance is easily deteriorated.

So far, the present inventors have considered these problems, and have developed a polyester-based aqueous emulsion that has oil resistance and water resistance without using a fluorine-based oil resistant agent and can easily improve the flexibility of a fiber structure substrate. We have developed fiber structures such as coated oil-resistant paper. (Patent application example: Japanese Patent Application No. 2003-078044)
In general, in a water-based emulsion coat, a coating liquid in which water is a solvent tends to foam with respect to a coating liquid in which an organic solvent is a solvent.

  The water-based emulsion coating method includes a direct gravure method and an offset roll coating method that are applied at a low coating amount, and a thick coating method includes a lip coating method, a comma coating method, and a rod. There are coat methods.

  The greater the coating amount, the better the water and oil resistance, but the disentanglement after disposal becomes worse and the recyclability becomes worse.

  The viscosity of the coating liquid is a physical property greatly related to the transfer amount and the coating surface. In the direct gravure printing method, about 50 to 100 mPa / 25 ° C. is desirable, and in the offset roll coating printing method, about 100 mPa to 500 mPa. The knowledge is desirable.

  Among these, the offset roll coat can achieve the lowest coating amount, so that the recyclability can be improved.

  The general resin coat thickness of the water-based emulsion-coated paper is about 6 to 20 μm, but the resin coat thickness by the offset roll coat can be applied as thin as about 2 to 6 μm. It approaches fiber structures such as thick fluoro paper.

  However, as already described, when the viscosity is adjusted for the offset roll coating, the viscosity is increased, and the bubbles are not easily removed.

  If the bubble is not easily removed, it is applied in the form of a foam, and pinholes are generated with certainty, particularly when thinly applied, so that it is not possible to have water / oil resistance barrier properties.

  In the present invention, it is an object to adjust the coating liquid for offset roll coating to improve bubble removal, prevent the occurrence of pinholes in the coating film, excellent in water and oil resistance, and excellent in recyclability. The object is to produce fiber structures such as paper.

The present invention is for solving the above-mentioned problems, and the present invention according to claim 1 is a chain hydrocarbon having a planar fiber structure base material and a carbon number in the range of 8 to 24 containing acetylene diol. It is a fiber structure characterized by comprising a polyester resin modified with a hydrophobic group, and the solid content weight ratio of the polyester resin and acetylene diol (polyester resin / acetylene diol ) is 10/1 to 4 And the compounding ratio of acetylene diol with respect to 100 parts of aqueous emulsion is 5-20, It is a fiber structure characterized by the above-mentioned.

The invention according to claim 2 is the fiber structure according to claim 1 , wherein the inorganic material using calcium carbonate or silica alone or in combination is 5 to 10 parts by weight with respect to 100 parts by weight of the polyester resin. It is the fiber structure characterized by including in the range.

The invention according to claim 3 is the fiber structure according to claim 1 or 2 , characterized in that the water absorption of Cobb is 10 g / m ² or less and the oil resistance is KIT 8 or more. .

The invention according to claim 4 is the addition of acetylenic diol to an aqueous polyester resin emulsion characterized by being modified with a hydrophobic group of a chain hydrocarbon having a carbon number in the range of 8 to 24. The mixing ratio of the polyester resin aqueous emulsion and acetylene diol is such that the solid content weight ratio (polyester resin / acetylene diol ) is 10/1 to 4, and the mixing ratio of acetylenic diol to 100 parts of the aqueous emulsion is 5 to 5. 20 is a method for producing a fiber structure, characterized in that an aqueous emulsion is applied.

The invention according to claim 5 is the method for producing a fiber structure according to claim 4 , wherein 5 wt.% Of the inorganic material containing calcium carbonate or silica alone or in combination with respect to 100 wt. It is the manufacturing method of the fiber structure characterized by mix | blending in the range of 10 parts by weight from the part, and coating.

The invention according to claim 6, in the manufacturing method according to claim 4 or 5 fiber structure according an aqueous emulsion viscosity are adjusted to a range of 100MPa～500mPa, ranges coating thickness of 2μ m ~6μ m A method for producing a fiber structure, wherein the fiber structure is coated.

The invention according to claim 7 is the method for producing a fiber structure according to any one of claims 4 to 6 , characterized in that the Cobb water absorption is 10 g / m ² or less and the oil resistance is KIT 8 or more. It is a manufacturing method of the fiber structure made into.

According to the first invention and the fourth invention, the water generated during stirring or processing is defoamed in a short time of several seconds to several minutes, and water resistance and oil resistance deterioration due to addition are suppressed as much as possible. An emulsion can be obtained.

According to 2nd invention and 5th invention, the fiber structure which improved paste pasting property by adding an inorganic substance, and its manufacturing method can be provided.

According to the sixth invention, it is possible to provide a fiber structure having excellent oil resistance without a pinhole at a low coating amount by an offset roll coating method, and a method for producing the same.

According to the third and seventh inventions, the fiber structure obtained in the first to second inventions and the production method obtained in the fourth to sixth inventions have a Cobb water absorption of 10 g / m ^2. The present invention provides a fiber structure having excellent water resistance and oil resistance having oil resistance of KIT8 or higher and a method for producing the same.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide the fiber structure which has high oil resistance and water resistance with a very low coating amount without using a fluorine-type oil-proofing agent, and can be recycled easily, and its manufacturing method.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a schematic diagram showing a cross-sectional configuration of a fiber structure according to the first embodiment of the present invention. The fiber structure Ts1 includes a planar fiber structure base T and a polyester resin layer R formed on the fiber structure base T.

Here, the fiber structure base T is a paper or cellulose structure, for example, chemical pulp such as hardwood bleached kraft pulp, softwood bleached kraft pulp, GP (ground pull), RGP (refiner ground pull: refiner) It is possible to use mechanical pulp such as crushed wood pulp) and TMP (thermomechanical pulp), or base paper made from these. The definition of this base paper is as follows: high quality paper, medium quality paper, glossy paper, kraft paper, and other acidic paper produced by a known long net multi-cylinder paper machine, long net Yankee type paper machine, circular net paper machine, etc. Includes neutral paper and alkaline paper. These base papers may contain paper-making auxiliary chemicals such as a paper strength enhancer, a sizing agent, a filler, and a yield improver.

  Specifically, when the fiber structure base T is paper, examples thereof include thin paper such as fine paper, imitation paper, and kraft paper, paperboard, cardboard, and non-woven fabric. Moreover, when the fiber structure base T is a cellulose structure, as an example, a structure mainly composed of cellulose fibers, such as a pulp mold, can be cited.

  The polyester-based resin layer R is a resin layer for imparting water resistance and oil resistance to the fiber structure base T, and is formed by applying a paint in which a polyester resin is dispersed in water. The polyester resin used in the paint is water-dispersible. For example, US Pat. No. 5,958,601 of Seydel companies, Inc., or the prior patent application of the present inventors. 2003-078044.

  Specifically, the polyester resin is modified with a hydrophobic group of a chain hydrocarbon. By having a hydrophobic group (lipophilic group), water resistance is improved. In addition, since water is used as a solvent during coating, the hydrophilic group modifies the resin, and a stable dispersion is obtained when in solution (water dispersion).

  In addition, the structure of the chain hydrocarbon as a hydrophobic group is similar in form to the hydrocarbon group of oil, and water resistance can be imparted because the structure does not wet each other due to the relationship between water and oil. In addition, since the structure is composed of carbon and hydrogen, it has high safety.

  Further, in order to repel water and prevent oil from penetrating into the paper, as shown in FIG. 5, a structure in which the fiber structure base T is coated with a polyester-based resin layer R having a hydrocarbon group as a hydrophobic group is used in an electrochemical process. Water and oil resistance are expressed in terms of structure and structure.

  As shown in the figure, the hydrophobicity of the hydrophobic groups can be improved by arranging them regularly and vertically on the fiber surface.

In addition, the arranged hydrophobic groups have a hydrocarbon carbon number in the range of 8 to 24, more preferably in the range of 12 to 18 carbon, from the viewpoint of preventing highly viscous oil such as oil from entering the fiber surface. The internal configuration is preferred. However, it is limited from the viewpoint of production yield to make the number of carbon atoms of the hydrophobic group uniform during resin production.
(function)
Here, the purpose of the oil resistance of the present invention is to reduce the rate at which the oil penetrates the fiber in order to reduce the possibility that the oil penetrates the fiber surface and penetrates the back surface and adheres to clothes, hands, etc. Or it means that the penetration of oil into the fiber is completely prevented.

The purpose of the water resistance in the present invention is to prevent abnormalities in the appearance of paper, for example, by absorbing water and swelling by not absorbing water. The prevention of abnormal appearance at this time is for the hygiene, safety, and product image protection of the packaged product.
(Use)
The oil resistant paper Ts1 can be used for applications such as printing / information paper, wrapping paper, sanitary paper, and industrial paper. However, the fiber structure Ts1 is not limited to these sheets, and can be used as a package such as a paper container, a bag, a composite container combined with a synthetic resin film, and the like.

  2-4 is a schematic diagram for demonstrating an example of the package P using a fiber structure. The package P is manufactured such that the polyester resin layer R is on the inner side and the fiber structure base T is on the outer side.

  Specifically, as shown in FIG. 2, after folding the ruled line portion (folded portion) fl in contact with the side ae surface of the fiber structure Ts1, the side b surface and the e surface are bonded. . Also, the a1 surface at the bottom and the b1 and c1 surfaces are bonded, and the d surface and the a2 surface at the side are bonded to each other. Thereafter, the broken ruled line portion fl is folded from the outside to produce a folded state as shown in FIG.

  This folded state corresponds to, for example, when transported to a food store or during storage, and can be easily assembled into a box-shaped state as shown in FIG. 4 when used.

  In addition, when the fiber structure Ts1 is used for the package P, as shown in FIG. 5, the resin layer R is selectively applied to the fiber structure base T and glued to the exposed fiber structure base T. A layer (adhesive layer) Adh may be formed.

  In any case, the package P as described above can be similarly applied to the fiber structures Ts2 to Ts3 described later. Furthermore, it is needless to say that the package P is not limited to the configuration illustrated in FIG. 4, and may be any configuration such as a configuration having another box shape or a bag shape.

For example, the package P does not need to have the folded state illustrated in FIG. 3. For example, the package P may be designed so that the bottom portion is smaller than the lid portion and can be stacked. However, this type of stackable configuration is also an example, and is not essential for the package P. That is, as the package P, a configuration for saving space such as the illustrated folded state or stackability is not essential. (use)
The package P is usually transported and stored in a food store in this folded state. Thereafter, when the sold food is packaged, it is assembled into a box shape as shown in FIG.

  And the package P is handed to a user in the state which accommodated the foodstuffs of oil, such as fried chicken.

At this time, inside the package P, for example, water or oil in contact with the surface layer of the polyester resin layer R of the fiber structure Ts1 is difficult to permeate and spreads on the surface layer. However, since the user takes out food from the package P and eats it until the oil oozes out of the package P, his / her hand is not soiled.
(recycling)
The package P after use is discarded as garbage. In the discarded package P, each resin layer R and the material of the fiber structure base T are easily separated in general alkaline water and in a defibrating process using a mixer. The obtained pulp of the fiber structure substrate T is recycled, for example, as recycled paper.

  According to the present embodiment, it is possible to provide a fiber structure that is thinner than the prior art and has oil resistance and water resistance without using a fluorine-based oil proofing agent and can easily recycle the fiber structure substrate.

  In addition, the example of the manufacturing method of such a fiber structure is shown below.

  A coating material is prepared in which a material containing a polyester resin as a main component is dispersed, for example, within a solid content of 10% to 60%. Moreover, the fiber structure base material T which applies these coating materials is prepared.

  Then, the polyester-type resin layer R is formed by applying a coating material to the single side | surface of the fiber structure base T, and making it dry.

  Thereby, as shown in FIG. 1, manufacture of the fiber structure Ts1 which laminated | stacked the polyester-type resin layer R on the fiber structure base material T is completed.

  Next, the fiber structure Ts1 is cut into a developed state in which a ruled line portion fl is formed as shown in FIG. Thereafter, the ruled line portion fl is bent, and the overlapping surfaces of the side portion and the bottom portion are adhered to each other, whereby the package P in a folded state is processed as shown in FIG.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention at the stage of implementation. In addition, the embodiments may be appropriately combined as much as possible, and in that case, combined effects can be obtained.

  Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, when an invention is extracted by omitting some constituent elements from all the constituent elements shown in the embodiment, when the extracted invention is implemented, the omitted part is appropriately supplemented by a well-known common technique. It is what is said.

  In addition, the present invention can be implemented with various modifications without departing from the gist thereof.

< Reference Example 1 (hereinafter referred to as Example 1)
Fiber structures were manufactured and tested as shown in Table 1 and below. Substrate; white paperboard (Pigeon card 260 g / m ² there top- clay court) coating machine; using the offset roll coater was applied an aqueous emulsion of the following. Resin-based; polyester-based resin (solid content: 20% (dispersion solvent water)) hydrophobic group; hydrocarbon decarbonizer of 10 or more carbon atoms; acetylene diol (solid content; 40% (dispersion solvent water)) addition amount: aqueous Stirring 2.5 parts (solid content ratio 10 / 0.5) with respect to 100 parts of emulsion; Aqueous emulsion adjusted to about 100 cc was put into a 300 cc beaker, and stirred for 15 minutes at 1000 rpm with a disper.

Each test was performed according to the following procedure.
Defoaming property 1; Defoaming property after stirring An aqueous emulsion adjusted according to the mixing ratio of each example in 100 cc into a 300 cc tall beaker with a desktop high-speed disper, and stirred for 15 minutes at a high speed of 1000 rpm forcibly generates bubbles. The time until the bubbles disappeared was measured.
Defoaming property 2; roll repelling during coating The aqueous emulsion is once transferred from the ink pan to a rubber roll during coating, and then transferred to a paper substrate. If the ink is transferred from the ink pan to the rubber roll and remains bubbled, a large crater-like repellency is generated when the bubble breaks. As a result, the ink coating applied to the paper has a defect. Using an aqueous emulsion prepared in a capacity of 10 kg, the presence or absence of repelling was visually confirmed by rotating a rubber roll of an actual printing machine at a low speed.
Viscosity: The viscosity at 25 ° C./6 rpm was measured with a Tokyo Keiki B-type viscometer.
Coating thickness: The film was transferred onto a resin film and then observed and measured with an optical microscope.
Oil resistance: It was carried out according to the TAPPI UM-557 KIT method.
Water resistance: Measured according to JIS P8114 Cobb water absorbency.
Pasting suitability; Pasting suitability confirmed the adhesiveness between the oil-resistant surfaces of oil-resistant paper. If the oil-resistant coated surfaces can be bonded to each other, the entire surface can be applied, so that it is not necessary to perform a plate for a box having various shapes. (It is not a serious requirement because there is no problem if the design is such that only the glued part is not oil-resistant coated due to the change in the design of the printing plate.) The oil-resistant paper is cut to a size of 50 mm width x 10 cm, The test was performed with one set of two sheets. The glue is water-based vinyl acetate (Syden Kagaku Cybinol DBA155), applied to the oil-resistant surface of the cut oil-resistant paper with a dry paint film of 15 mm wide x 3 cm to a dry paint film thickness of about 3μ, and then It is overlapped with a sheet of oil-resistant paper and adhered by reciprocating several times with a 200 g roller. Thereafter, it is dried for 30 seconds in a drying oven adjusted to 80 ° C. and taken out. Confirm that there is no peeling when taken out, and then leave the oil-resistant papers for 24 hours in an environment of 25 ° C. and 60%. If the papers are cohesively broken (paper peeling), it is OK. In the case of interface peeling or cohesive failure of the adhesive, it was judged as NG.
Disaggregation (recyclability): Prepare 10 sheets of oil-resistant paper cut to 3cm x 3cm, add 1L of water, put it in the disaggregator container, soften it for 10 minutes, and then disaggregate for 10 minutes with the mixer of the disaggregator Then, the oil-resistant paper in the form of a slurry was concentrated with a metal mesh, and it was determined as OK if the resin coating was broken to a size of 1 mm × 1 mm or less.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring); When the defoaming property after stirring was measured, the foaming was almost eliminated after 3 hours, but there was also a foam remaining on the side of the beaker without defoaming.
Defoaming property 2 (whether or not the roll was repelled during coating); foam was generated in the ink pan and was not defoamed, so it was transferred to the paper while chewing the foam.
Even on the rubber roll, the bubbles did not break, so even if the bubbles were not repelled, the liquid in which the bubbles were held was transferred, and pinholes were found in the coating film formed on the paper.
Viscosity: 88 mPa · s, which was slightly low in coating.
Application thickness: 1.9 μm.
Oil resistance: less than KIT1.
Cobb water absorption: 54 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, it was not possible to obtain oil-resistant paper having oil resistance that can be used for general purposes.

  The amount of acetylene diol added was changed to 5 parts (10/1 in terms of solid content ratio) with respect to 100 parts of the aqueous emulsion, and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, it was almost defoamed in a few seconds and all defoamed in a few dozen seconds.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, they immediately defoamed and did not bite into the roll.
Even on the rubber roll, no repelling occurred and a uniform surface was formed and transferred to the paper.
Viscosity: 145 mPa · s, which is a preferable viscosity for coating.
Coating thickness: 3.6 μm.
Oil resistance: KIT8.
Cobb water absorption: 7 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, an oil-resistant paper having oil resistance that can be used for general purposes could be obtained.

  The addition amount of acetylene diol was changed to 10 parts (10/2 in terms of solid content) with respect to 100 parts of the aqueous emulsion, and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, it was almost defoamed in a few seconds and all defoamed in a few dozen seconds.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, they immediately defoamed and did not bite into the roll.
Even on the rubber roll, no repelling occurred and a uniform surface was formed and transferred to the paper.
Viscosity: 280 mPa · s, which is a preferable viscosity for coating.
The coating thickness was 4.6 μm.
Oil resistance: KIT10.
Cobb water absorption: 7 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, an oil-resistant paper having oil resistance that can be used for general purposes could be obtained.

  The amount of acetylene diol added was changed to 20 parts with respect to 100 parts of the aqueous emulsion (the solid content ratio was 10/4), and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, it was observed that the foaming immediately disappeared even if it occurred.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, they immediately defoamed and did not bite into the roll.
Even on the rubber roll, no repelling occurred and a uniform surface was formed and transferred to the paper.
Viscosity: 510 mPa · s, which is a preferable viscosity for coating.
The coating thickness was 4.8 μm.
Oil resistance: KIT10.
Cobb water absorption: 7 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, an oil-resistant paper having oil resistance that can be used for general purposes could be obtained.

  The amount of acetylene diol added was changed to 10 parts per 100 parts of the aqueous emulsion (solid content ratio: 10/2), and 5 parts of calcium carbonate with a particle size of 0.5μ was added to 100 parts of the aqueous emulsion. The others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring); When the defoaming property after stirring was measured, all bubbles were broken in a few seconds.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, they immediately defoamed and did not bite into the roll.
Even on the rubber roll, no repelling occurred and a uniform surface was formed and transferred to the paper.
Viscosity: 300 mPa · s, which is a preferable viscosity for coating.
The coating thickness was 4.6 μm.
Oil resistance: KIT10.
Cobb water absorption: 7 g / m ² · 2 minutes.
Suitability for pasting; paper fiber portion was agglomerated and broken (peeling).
Adhesion between the oil resistant layers was possible.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, an oil-resistant paper having oil resistance that can be used for general purposes can be obtained, and an oil-resistant paper that can be bonded to the oil-resistant layers and has an advantage in production can be obtained.

  Evaluation was performed in the same manner as in Example 1 except that acetylene diol was not added.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, the foam did not break even when allowed to stand for 1 day.
Defoaming property 2 (presence / absence of roll repelling during coating); even when bubbles were generated in the ink pan, no bubbles were broken. The film was transferred to paper with the bubbles in the roll. No repelling occurred on the rubber roll, but when transferred to paper, the bubbles broke and pinholes were found in the coating layer.
Viscosity: 50 mPa · s, and the coating property was poor because of low viscosity.
Application thickness: 1.8 μm.
Oil resistance: less than KIT1.
Cobb water absorption: 70 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, it was not possible to obtain oil-resistant paper having oil resistance that can be used for general purposes.

  A silicon-based antifoaming agent having a solid content of 2% was added. The addition amount was changed to 0.0125 part (10 / 0.000125 in terms of solid content ratio) with respect to 100 parts of the aqueous emulsion, and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring); When the defoaming property after stirring was measured, all of the foams disappeared in 30 minutes.
Defoaming property 2 (presence / absence of roll repelling during coating);
A large crater-like defect (repel) was generated when the bubbles broke on the roll. Since the defects did not fill up due to the liquid spreading on the rubber roll, the defects were transferred to paper, and large pinholes were seen in the coating layer.
Viscosity: 50 mPa · s, and the coating property was poor because of low viscosity.
Application thickness: 1.8 μm.
Oil resistance: less than KIT1.
Cobb water absorption: 57 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, it was not possible to obtain oil-resistant paper having oil resistance that can be used for general purposes.

  A silicon-based antifoaming agent having a solid content of 2% was added. The addition amount was changed to 0.025 parts (10 / 0.00025 in solid content ratio) with respect to 100 parts of the aqueous emulsion, and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, all the defoaming occurred within a few minutes.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, the bubbles broke, but when the bubbles broke on the roll, a large crater-like defect (repellency) occurred . Compared with Example 7, the size of the repel was increased. Since the defects did not fill up due to the liquid spreading on the rubber roll, the defects were transferred to paper, and large pinholes were seen in the coating layer.
Viscosity: 50 mPa · s, and the coating property was poor because of low viscosity.
Application thickness: 1.8 μm.
Oil resistance: less than KIT1.
Cobb water absorption: 59 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, it was not possible to obtain oil-resistant paper having oil resistance that can be used for general purposes.

  A silicon-based antifoaming agent having a solid content of 2% was added. The amount added was changed to 0.05 parts (10 / 0.0005 in terms of the solid content ratio) with respect to 100 parts of the aqueous emulsion, and the others were evaluated in the same manner as in Example 1.

The evaluation results were as follows.
Defoaming property 1 (defoaming property after stirring): When the defoaming property after stirring was measured, all the defoaming occurred within a few seconds.
Defoaming property 2 (whether or not the roll was repelled during coating); even if bubbles were generated in the ink pan, the bubbles broke, but when the bubbles broke on the roll, a large crater-like defect (repellency) occurred . Compared with Examples 7 and 8, the size of the repel was increased. Since the defects did not fill up due to the liquid spreading on the rubber roll, the defects were transferred to paper, and large pinholes were seen in the coating layer.
Viscosity: 50 mPa · s, and the coating property was poor because of low viscosity.
Application thickness: 1.8 μm.
Oil resistance: less than KIT1.
Cobb water absorption: 56 g / m ² · 2 minutes.
Adhesive paste suitability: Peeled at the interface between the oil-resistant layer and the adhesive.
It was necessary for the glue pasting part not to have an oil-resistant layer.
Recyclability: The resin was broken to 1 mm × 1 mm or less and did not remain as large foreign matter.

  In this example, it was not possible to obtain oil-resistant paper having oil resistance that can be used for general purposes.

  The above is summarized in Table 1.

  The present invention can be used for applications such as printing / information paper, wrapping paper, sanitary paper, industrial paper, etc., in addition to fiber structures used in oily food containers such as fried chicken. However, the fiber structure Ts1 is not limited to these sheets, and the fiber structure Ts1 can be used as a packaging body such as a paper container, a bag, a composite container combined with a synthetic resin film, and the like. The present invention relates to a fiber structure capable of improving oil resistance and a method for producing the same.

It is a mimetic diagram showing the section composition of the textile structure concerning one embodiment of the present invention. It is a schematic diagram for demonstrating an example of the package of the embodiment. It is a schematic diagram for demonstrating an example of the package of the embodiment. It is a schematic diagram for demonstrating an example of the package of the embodiment. It is a schematic diagram for demonstrating the fiber structure of the embodiment.

Explanation of symbols

Ts1 to Ts3 ... Fiber structure T ... Fiber structure base material R ... Polyester resin layer P ... Packaging body fl ... Ruled line part Adh ... Glue layer

Claims (7)

A fiber structure comprising a planar fiber structure base material and a polyester-based resin modified with a hydrophobic group of a chain hydrocarbon having 8 to 24 carbon atoms including acetylenediol The solid content weight ratio of polyester resin and acetylene diol (polyester resin / acetylene diol ) is 10/1 to 4, and the compounding ratio of acetylene diol to 100 parts of aqueous emulsion is 5 to 20. Fiber structure.   The fiber structure according to claim 1, wherein the inorganic material containing calcium carbonate or silica alone or in combination is contained in an amount of 5 to 10 parts by weight with respect to 100 parts by weight of the polyester resin. Fiber structure. The fiber structure according to claim 1 or 2, wherein the water absorption of Cobb is 10 g / m ² or less and the oil resistance is KIT 8 or more. The polyester resin aqueous emulsion is modified with a hydrophobic group of a chain hydrocarbon having a carbon number in the range of 8 to 24, and acetylene diol is added to the polyester resin aqueous emulsion and the acetylene diol . Coating the water-based emulsion in which the blending ratio is blended at a solid content weight ratio (polyester resin / acetylene diol ) of 10/1 to 4 and the blending ratio of acetylene diol to 100 parts of the aqueous emulsion is 5-20. A method for producing a fiber structure, characterized in that:   The method for producing a fiber structure according to claim 4, wherein an inorganic material containing calcium carbonate or silica alone or in combination is blended in an amount of 5 to 10 parts by weight with respect to 100 parts by weight of the polyester resin aqueous emulsion. And a method for producing a fiber structure, characterized by being coated.   The method for producing a fiber structure according to claim 4 or 5, wherein the aqueous emulsion whose viscosity is adjusted to a range of 100 mPa to 500 mPa is applied in a range of a coating thickness of 2 µm to 6 µm. A method for producing a fiber structure. The method for manufacturing a fiber structure according to any one of claims 4 to 6, wherein the water absorption of Cobb is 10 g / m ² or less and the oil resistance is KIT 8 or more.

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