JP2003034372A - Pocket tissue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pocket tissue provided with a bag that can be disposed of in the natural environment without causing any problems. SOLUTION: Laminated tissue papers are packaged in the bag made of a film to make the pocket tissue, wherein the film consists of more than one kind of polymers selected among a biodegradable fatty polyester, a biodegradable polyester-aromatic copolymerized polyester, and a biodegradable polyester carbonate copolymer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pocket tissue in which laminated tissue paper is wrapped in a film bag.

[0002]

2. Description of the Related Art A pocket tissue in which folded tissue papers are laminated and housed inside a film bag has been known. The bag is generally made of a plastic film such as a CPP film.

[0003]

However, the bag formed of the ordinary plastic film does not decompose due to its chemical stability when it is discarded in the natural environment,
It just accumulates as garbage. In the future, it is becoming more and more difficult to secure landfills and landfills, and there are concerns about problems such as adversely affecting the natural environment and wild animals. Even in the case of incineration, there are problems that harmful gas is generated and the incinerator is deteriorated.

Therefore, an object of the present invention is to solve the above problems and provide a pocket tissue having a bag body that can be discarded without problems.

[0005]

In order to achieve this object, the present invention is a pocket tissue in which folded and laminated tissue paper is wrapped in a bag made of a film, wherein the film is a biodegradable aliphatic Polyester,
A gist of a pocket tissue characterized by being formed of at least one polymer selected from a biodegradable aliphatic-aromatic copolyester and a biodegradable polyester carbonate copolymer. is there.

With such a structure, since the bag body for packaging the tissue paper is formed by the film made of the biodegradable polymer as a raw material, the bag is disposed even in the natural environment. The body can be decomposed by microorganisms and the like, and therefore should not adversely affect the natural environment.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a bag for packaging laminated tissue paper in a pocket tissue comprises a biodegradable aliphatic polyester, a biodegradable aliphatic-aromatic copolyester, and a biodegradable aliphatic polyester. It is necessary to be composed of a film formed of at least one kind of polymer selected from a decomposable polyester carbonate copolymer.

Of these, examples of the biodegradable aliphatic polyester include polymers made of polyglycolic acid or polylactic acid such as poly (α-hydroxy acid) or copolymers thereof, and poly (ε). -Caprolactone), poly ([omega] -hydroxyalkanoates) such as poly ([beta] -propiolactone), poly-3-hydroxypropionate, poly-3-hydroxybutyrate,
Such as poly-3-hydroxycaprolate, poly-3-hydroxyheptanoate, poly-3-hydroxyoctanoate, poly-3-hydroxyvalerate, poly-4-hydroxybutyrate or copolymers thereof. And poly (β-hydroxyalkanoate). Further, as a polycondensate of glycol and dicarboxylic acid, for example, polyethylene oxalate, polyethylene succinate, polyethylene adipate, polyethylene azelate, polybutylene oxalate, polybutylene succinate, polybutylene adipate, polybutylene sebacate, Examples thereof include polyhexamethylene sebacate, polyneopentyl oxalate, and copolymers thereof.

To these, a urethane bond, an amide bond, an ether bond or the like can be introduced to the extent that biodegradability is not affected. Among these biodegradable aliphatic polyesters, polylactic acid, which has sufficient heat resistance because of its high melting point and is relatively inexpensive, is sometimes obtained from a natural product, and as a polymer with excellent practicality. Is expected. Examples of such polylactic acid are poly L-lactic acid whose structural unit is lactic acid, poly D-lactic acid whose structural unit is D-lactic acid, and a copolymer of L-lactic acid and D-lactic acid. Examples thereof include copolymers of poly DL-lactic acid, lactic acid or lactide with other hydroxycarboxylic acids, dicarboxylic acids, diols, cyclic lactones, and mixtures thereof. The number average molecular weight of polylactic acid is preferably in the range of 50,000 to 300,000, more preferably 80,000 to 150,000. If the number average molecular weight is less than 50,000, the mechanical strength of the obtained film will be insufficient, and cutting will frequently occur during the stretching and winding steps, resulting in a decrease in operability. On the other hand, when the number average molecular weight exceeds 300,000, the fluidity at the time of heating and melting becomes poor and the film formability deteriorates.

The biodegradable aliphatic-aromatic copolyester may be one having an aliphatic component and an aromatic component, and examples thereof include hydroxycaproic acids such as lactic acid, glycolic acid, hydroxybutyric acid and hydroxycaproic acid. Cyclic lactones such as caprolactone, butyrolactone, lactide and glycolide, diols such as ethylene glycol, butanediol, cyclohexanedimethanol, bis-hydroxymethylbenzene and toluenediol, succinic acid, adipic acid, suberic acid, sebacic acid, terephthalic acid, Examples thereof include copolymers containing dicarboxylic acids such as isophthalic acid and naphthalene dicarboxylic acid, cyclic acid anhydrides, and oxiranes as components and having an aliphatic component and an aromatic component. Among them, 1, as an aliphatic component
A copolyester having 4-butanediol, adipic acid, and terephthalic acid as an aromatic component is preferable. Further, to these, a urethane bond, an amide bond, an ether bond, or the like can be introduced to the extent that biodegradation is not affected.

The number average molecular weight of such aliphatic-aromatic copolyester is preferably 20,000 or more, more preferably 100,000 to 300,000. The method for polymerizing the aliphatic-aromatic copolyester is not particularly limited, and examples thereof include condensation polymerization method and ring-opening polymerization method. In addition, at the time of polymerization or immediately after the polymerization, other polymers, monomers, oligomer components, etc.
A method in which one or more kinds of subcomponents are added and the polymerization is further advanced is also possible.

The biodegradable polyester carbonate copolymer in the present invention is obtained by reacting a polyester obtained by reacting dicarboxylic acids, diols, hydroxycarboxylic acids, acid anhydrides and the like with a carbonate compound. Is.

Among these, examples of the dicarboxylic acid include oxalic acid, malonic acid, glutaric acid, succinic acid, adipic acid, suberic acid, sebacic acid, dodecanoic acid, azelaic acid, terephthalic acid, isophthalic acid and naphthalenedicarboxylic acid. Can be used together appropriately. These dicarboxylic acids may be their esters or acid anhydrides.

Examples of the diol include ethylene glycol, trimethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, pentanediol, hexanediol, octanediol, neopentyl glycol, cyclohexanediol and cyclohexane. Dimethanol, bis-hydroxymethylbenzene, toluene diol, etc. can be appropriately used in combination.

Examples of the hydroxycarboxylic acid compound include lactic acid, glycolic acid, β-hydroxybutyric acid, hydroxypivalic acid, hydroxyvaleric acid and the like, and these can also be used as derivatives such as esters and cyclic esters.

These dicarboxylic acid, diol and hydroxycarboxylic acid compounds can be used alone or as a mixture, and any combination can be used. However, in the present invention, 1,4 as the diol
It is preferable to use -butanediol and succinic acid or adipic acid as the dicarboxylic acid.

Specific examples of the carbonate compound in the present invention include diphenyl carbonate, ditolyl carbonate, bis (chlorophenyl) carbonate,
Mention may be made of diaryl carbonates such as m-cresyl carbonate and also carbonate compounds such as dimethyl carbonate, diethyl carbonate, diisopropyl carbonate, dibutyl carbonate, diamyl carbonate, dioctyl carbonate. However, it is not limited to these. In addition to the above-mentioned carbonate compound composed of the same kind of hydroxy compound, an asymmetric carbonate compound or a cyclic carbonate compound composed of different kinds of hydroxy compounds can be used.

The film constituting the pocket tissue of the present invention is at least two kinds selected from biodegradable aliphatic polyester, biodegradable aliphatic-aromatic copolyester and biodegradable polyester carbonate copolymer. It can also be formed by a mixture of

In the pocket tissue of the present invention,
From the viewpoint of imparting appropriate flexibility to the film forming the bag body for packaging the laminated tissue paper and improving the touch, the elastic modulus of the film is 2.0 G.
It is preferably Pa or less. Thus, as a means for imparting flexibility to the film, a flexible resin is used or added, or other components are copolymerized,
For example, adding a plasticizer.

Further, in order to wrap the laminated tissue paper inside, a heat-sealing strength of this film is preferably 4 N / cm or more from the viewpoint of forming a bag body from the film. In order to impart heat sealability to the film as described above, a method of lowering the melting point or softening point of the film by using or copolymerizing a resin having a low melting point or softening point, and the like can be mentioned.

When the film is made of polylactic acid,
Since this polylactic acid has the properties of being hard and brittle among aliphatic polyesters and has a high melting point, it is preferably subjected to a plasticizing treatment for the purpose of softening. In order to perform such plasticization, biodegradable aliphatic-aromatic copolyester having a flexible property, aliphatic polyester copolymer, polyester carbonate copolymer, polylactic acid, and the like are added to polylactic acid. It is preferable to mix them. With such a composition, flexibility can be imparted to the polylactic acid, which is hard and brittle at room temperature. For this purpose, it is effective to use a resin having a glass transition temperature of 0 ° C. or lower, particularly a biodegradable aliphatic-aromatic copolyester. If the glass transition temperature is higher than 0 ° C, it becomes difficult to impart sufficient flexibility to the film.

As described above, even if a plasticizer is added to polylactic acid, flexibility can be imparted, but if the plasticizer is simply added, the plasticizer tends to bleed out.
However, by blending a low-crystallinity copolyester, especially a biodegradable aliphatic-aromatic copolyester, bleed-out of the plasticizer is suppressed, and good film-forming property is obtained, and a film is obtained. Even if printing is performed, the ink does not flow out or peel off, and good printability can be obtained. Further, the plasticizer and biodegradable aliphatic-aromatic copolyester reduces the crystallinity of the resin composition, but by blending an inorganic filler as described below, this inorganic filler becomes a crystal nucleating agent. Good film formability is obtained,
Further, it is possible to suppress blocking of the film during film formation and to impart slipperiness.

That is, when polylactic acid is blended with a biodegradable aliphatic-aromatic copolyester and a plasticizer, the crystallinity is remarkably lowered, and a resin design with extremely high flexibility can be obtained. Retention is also greatly improved, and bleed-out resistance can be improved.

Specifically, in the conventional biodegradable aliphatic polyester, the dicarboxylic acid component constituting the polyester is an aliphatic dicarboxylic acid, so the melting point of the obtained resin is different from the critical processing temperature in a general processing method. The temperature drops to about 100 ° C. Further, when a large amount of a component such as adipic acid is copolymerized for the purpose of imparting flexibility, the melting point is further lowered and the processability of the resin is deteriorated. Can not.

However, since the biodegradable aliphatic-aromatic copolyester also uses an aromatic dicarboxylic acid as a constituent component of the polyester as described above, an aliphatic dicarboxylic acid which induces a melting point lowering is used as an aliphatic dicarboxylic acid. Even if it is copolymerized in a larger amount than in the case of polyester, the melting point of the resin is maintained at about 100 ° C., the processability of the resin is not adversely affected, the crystallinity is remarkably lowered, and the flexibility is extremely high. Enables resin design. As described above, the biodegradable aliphatic-aromatic copolyester according to the present invention is excellent in processability and flexibility, the retention of the plasticizer is remarkably improved, and the bleed-out resistance can be improved.

As such a biodegradable aliphatic-aromatic copolyester, those having a glass transition temperature of 0 ° C. or less are preferable, and those having a heat of crystal fusion of 25 J / g or less are preferable. When the heat of crystal fusion of this biodegradable aliphatic-aromatic copolyester exceeds 25 J / g, the plasticizer cannot be retained due to the decrease of the amorphous region due to the improvement of the crystallinity of the resin, and the plasticizer bleeds out. It will be easier.

As the plasticizer, polylactic acid is compatible with the biodegradable aliphatic-aromatic copolyester, is non-volatile, is non-toxic from the viewpoint of environmental problems, and is FDA ( Food and Drug Ad
Those that have passed the ministration) are preferable. Specifically, ether ester-based plasticizers and oxyacid ester-based plasticizers are preferably used from the viewpoint of bleed-out resistance that suppresses bleed-out of plasticizers into molded articles and plasticization efficiency of resin compositions. it can. Bismethyldiethylene glycol adipate and bisbutyldiethylene glycol adipate can be preferably used as the ether ester plasticizer, and tributyl acetyl citrate and triacetin can be preferably used as the oxyacid ester plasticizer. These plasticizers may be used alone or in combination of two or more.

The inorganic filler functions as a crystal nucleating agent and a lubricant. Examples of the inorganic filler include talc, silica, calcium carbonate, magnesium carbonate, kaolin, mica, titanium oxide, aluminum oxide, zeolite, clay and glass beads. Particularly, talc is preferable because it exhibits the most effect as a crystal nucleating agent for polylactic acid. An organic lubricant may be used in combination with this inorganic filler, and specific examples of the organic lubricant include, for example, liquid hydrocarbon, microcrystalline wax, natural paraffin, synthetic paraffin, and other aliphatic hydrocarbon lubricants, stearic acid, and lauryl. Fatty acid type lubricants such as acids, hydroxystearic acid, hydrogenated castor oil, erucic acid amides, stearic acid amides, oleic acid amides, ethylenebisstearic acid amides, ethylenebisoleic acid amides, ethylenebislauric acid amides and the like, Metal soap lubricants, which are fatty acid metal salts having 12 to 30 carbon atoms such as aluminum stearate, lead stearate, calcium stearate, and magnesium stearate, fatty acid (partial) of polyhydric alcohol such as glycerin fatty acid ester, sorbitan fatty acid ester. Ether-based lubricants, butyl stearate, and long chain ester wax is a fatty acid ester lubricant or a composite lubricant These were combined, such as montan wax.

In particular, when a plasticizer is added to a resin component composed of polylactic acid and a biodegradable aliphatic-aromatic copolyester, the melt tension of the film is lowered with the plasticization of the resin and the film-forming property is lowered. However, blocking of the film and the like occur, but by incorporating an inorganic filler, blocking during film formation and slipperiness can be imparted.

The compounding ratio of the polylactic acid and the biodegradable aliphatic-aromatic copolyester constituting the film is a mass ratio of (polylactic acid) / (biodegradable aliphatic-aromatic copolyester) = It is preferably in the range of 95/5 to 30/70 (mass%). When the content of the polylactic acid-containing component exceeds 95% by mass, the obtained film has poor flexibility. If the content of the polylactic acid-containing component is less than 30% by mass, the biodegradable aliphatic-aromatic copolymerized polyester component will be the main component, resulting in poor heat resistance, mechanical properties and degradability. Therefore, the compounding ratio of the polylactic acid and the biodegradable aliphatic-aromatic copolyester is (polylactic acid) / (biodegradable aliphatic-aromatic copolyester) = 80/20 by mass ratio.
50/50 (mass%) is more preferable, and 80
It is more preferably / 20 to 60/40 (mass%).

The blending ratio of the plasticizer is 100 in total of polylactic acid and biodegradable aliphatic-aromatic copolyester.
It is preferably 1 to 30 mass% with respect to mass parts.
When the content ratio of the plasticizer is less than 1% by mass, the glass transition temperature of polylactic acid is hardly lowered, and thus the obtained film is inferior in flexibility and is not suitable for the bag field. Further, when the content ratio of the plasticizer exceeds 30% by mass,
The glass transition temperature of polylactic acid is too low, and the hydrolysis rate of the obtained film is rapidly accelerated, resulting in too short product life. Further, bleeding out of the plasticizer occurs, which causes problems such as film blocking during film formation and defective printing. Therefore, the blending ratio of the plasticizer is more preferably 7 to 20% by mass.

The mixing ratio of the inorganic filler is 10 in total of polylactic acid and biodegradable aliphatic-aromatic copolyester.
It is preferably in the range of 0.5 to 40 mass% with respect to 0 mass part. If the content ratio of the inorganic filler is less than 0.5% by mass, the effect of the crystal nucleating agent of the inorganic filler does not appear, and the film formation becomes difficult due to insufficient melt tension of the film during film formation. In addition, the film itself is inferior in slipperiness and blocking resistance, and processing problems such as post-processing may occur. On the other hand, when the content ratio of the inorganic filler exceeds 40% by mass, the physical properties of the obtained film, particularly tear strength, heat seal strength and the like are remarkably deteriorated, which poses a practical problem. Therefore, the mixing ratio of the inorganic filler is preferably 5 to 30% by mass, and 10 to 2
It is more preferably 0% by mass.

The resin composition constituting the film of the present invention contains the resin composition for the purpose of suppressing a decrease in melt tension during film formation.
If necessary, a crosslinking agent such as an organic peroxide and a crosslinking aid may be used in combination to slightly crosslink the resin composition.

Specific examples of the cross-linking agent include n-butyl-
4,4-bis-t-butylperoxyvalerate, dicumyl peroxide, di-t-butylperoxide,
Di-t-hexyl peroxide, 2,5-dimethyl-
2,5-di (t-butylperoxy) hexane, 2,5
-Dimethyl-2,5-t-butylperoxyhexyne-
3, such as organic peroxides, phthalic anhydride, maleic anhydride, trimethyladipic acid, trimellitic anhydride, 1,
Polyvalent carboxylic acids such as 2,3,4-butanetetracarboxylic acid, metal complexes such as lithium formate, sodium methoxide, potassium propionate and magnesium ethoxide, bisphenol A type diglycidyl ether, 1,6
-Epoxy compounds such as hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, terephthalic acid diglycidyl ester, hexamethylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate Isocyanate compounds such as

Specific examples of the crosslinking assistant include glycidyl methacrylate, normal-butyl methacrylate, hydroxypropyl monomethacrylate, polyethylene glycol monomethacrylate and the like.

The resin composition constituting the film may be a slip agent, a crystal nucleating agent, an ultraviolet protective agent, a light stabilizer, an antifogging agent, an antifogging agent, an antistatic agent, a flame retardant, an anti-coloring agent, depending on the use. Additives other than the above, such as antioxidants, fillers, and pigments can also be added.

The method for producing the film of the present invention is not particularly limited, but, for example, after the raw material is sufficiently dried to remove the water content, it is melted at a melting temperature suitable for the composition from a T die, an I die, a round die or the like. A sheet or cylinder extruded to a predetermined thickness is cooled and solidified with a cooling roll, water, compressed air or the like. The raw material resin composition may be melt-kneaded in advance in order to perform sufficient mixing. After that, uniaxial or biaxial stretching may be performed by a roll method, a tenter method, a tubular method, or the like. In the case of stretching, the stretching temperature is in the range of 50 to 110 ° C., and the stretching ratio is in the range of 1.5 to 10 in both the longitudinal and transverse directions.
After stretching, heat treatment may be performed by a method of blowing hot air, a method of irradiating with infrared rays, a method of irradiating with microwaves, a method of contacting with a heat roll, or the like. Among them, the method of blowing hot air is preferable because it can be uniformly and accurately heated, and the heat treatment is preferably performed in the range of 70 to 170 ° C.

[0038]

EXAMPLES Next, examples of the present invention will be described. In addition, the measurement of various physical property values in the following Examples and Comparative Examples was performed by the following methods. (1) Tensile Strength (MPa) and Tensile Elongation (%) Measured according to the method described in JIS K-7127. (2) Tensile elastic modulus (GPa) It was measured according to the method described in JIS K-7127. (3) Heat seal strength ((N / cm) 120 ° C.) The film is 15 mm wide and 100 m long along the MD direction.
It was cut into a strip of m, and two strips of this sample were stacked and set so as to be orthogonal to a heat sealer having a heat seal bar with a width of 20 mm, then heated at 120 ° C. from one side and at a pressure of 0.2 MPa. Heat sealing was performed for 2 seconds to obtain a sample. Using an autograph manufactured by Shimadzu Corporation, this sample is peeled off at a peeling speed of 300 mm / min according to JIS K-6854 until the heat-sealed portion is peeled off or the bonded portion by heat-sealing remains to 1 mm. , T-type peel test. The measured peak value at that time was defined as the heat seal strength. (4) Biodegradability A sample with a width of 250 mm and a length of 500 mm was used, and the water content was 6
Composting treatment was performed at a temperature of 80 ° C. at 5%, and the state of the film after 5 days was visually observed. As a result, a sample having 80% or more disappearance was evaluated as good (○),
A sample disappearance of less than 50% was evaluated as poor (x).

Example 1 Polylactic acid (manufactured by Cargill Dow: Nature Work)
s) A resin composition prepared by adding 0.08 part by weight of agglomerated silica having an average particle diameter of 1.8 μm as a surface lubricant to 100 parts by weight of a surface-lubricating agent using a single screw extruder with a T-die and a bore of 90 mm,
After extruding into a sheet at a resin temperature of 230 ° C., it was pressed against a cast roll having a surface temperature of 25 ° C. with an air knife to cool. Next, the cooled sheet is introduced into a variable magnification pantograph type simultaneous biaxial stretching machine, and while preheating the film at 60 ° C., at 85 ° C., the MD direction is 3.0 times, and the TD direction is 3.0 times. Simultaneous biaxial stretching treatment was performed. Then 1
While heat-treating at 25 ° C., relaxation heat treatment of 5% was performed in the TD direction to obtain a 30 μm-thick film for pocket tissues.

Table 1 shows the physical properties of the obtained film.

[0041]

[Table 1]

Example 2 80% by mass of the polylactic acid used in Example 1 and 20% by mass of polybutylene succinate adipate (Bionore # 3001 manufactured by Showa High Polymer Co., Ltd.), which is an aliphatic polyester having a heat of fusion of crystal of 45 J / g. % Was used as a blend. Then, except that the same as in Example 1, the thickness was 30 μm.
A film for pocket tissue was obtained. Table 1 shows the physical properties of the obtained film.

Example 3 70% by mass of the polylactic acid used in Example 1 was blended with 30% by mass of polyester carbonate having a crystal fusion heat of 42 J / g (Made by Mitsubishi Gas Chemical Co., Inc .: UPEC 550). Then, other than that, in the same manner as in Example 1,
A film for pocket tissue having a thickness of 30 μm was obtained. Table 1 shows the physical properties of the obtained film.

Example 4 As polylactic acid, 70% by mass of crystalline polylactic acid (Nature Works manufactured by Cargill Dow) having a content of D-lactic acid of 1.2 mol% and a mass average molecular weight of 200,000, and D-
Amorphous polylactic acid having a lactic acid content of 10 mol% and a mass average molecular weight of 200,000 (manufactured by Cargill Dow: Nature)
(Works) 30% by mass was used.

60% by mass of this polylactic acid and polybutylene adipate terephthalate (manufactured by BASF: Eco) as a biodegradable aliphatic-aromatic copolyester having a glass transition temperature of -30 ° C. and a heat of crystal fusion of 15 J / g. Flex F) 100 parts by mass including 40% by mass,
8 mass% of bismethyldiethylene glycol adipate (manufactured by Daihachi Chemical Co., Ltd .: MXA) as a plasticizer, and 15 mass% of talc having an average particle diameter of 2.75 μm (Hayashi Kasei: Upu HST-0.5) as an inorganic filler. And are mixed so as to be blended, and melt-kneaded using a twin-screw extrusion kneader (manufactured by Japan Steel Works: model number TEX44α), and an extrusion temperature of 230 ° C.
A polylactic acid-based compound raw material was produced.

Next, this polylactic acid-based compound raw material was melt-extruded at a preset temperature of 190 ° C. using a uniaxial extruder (made by Tommy Machinery Co., Ltd.) with a screw diameter of 50 mm equipped with a circular die having a diameter of 100 mm. The molten resin composition discharged from the die was expanded by air pressure and simultaneously formed into a tubular film while being air-cooled by an air ring. Such film formation of the composition was carried out in an environment temperature-controlled at 25 to 30 ° C.

The tube-shaped film was taken at a speed of 20 m / min by a set of pinch rolls installed on the upper part of the die, and after a cooling time of about 7 seconds, the tube-shaped film was nipped by the pinch rolls. A film having a thickness of 30 μm and a film folding width of 250 mm was prepared by winding the film with a winding machine for 100 m. Table 1 shows the physical properties of the obtained film.

Example 5 Tributyl acetylcitrate (manufactured by Taoka Chemical Co., Ltd .:
ATBC) and its blending ratio was 10% by mass. Then, other than that, in the same manner as in Example 3, the thickness is 30 μm.
I got a film of. Table 1 shows the physical properties of the obtained film.

Example 6 Polybutylene adipate terephthalate (B
A film having a thickness of 30 μm was obtained in the same manner as in Example 4 except that the setting temperature of the extruder was set to 160 ° C. using only ASF's Ecoflex F). Table 1 shows the physical properties of the obtained film.

Example 7 A film having a thickness of 30 μm was obtained in the same manner as in Example 6 except that only polybutylene succinate adipate (manufactured by Showa Highpolymer Co., Ltd .: Bionole # 3001) was used as the resin. Table 1 shows the physical properties of the obtained film.

Comparative Example 1 Using a commercially available CPP film (Pyrene film-CT manufactured by Toyobo Co., Ltd., thickness 30 μm), the same physical properties as those in the above-mentioned Examples were measured. The results are shown in Table 1.

The films of Examples 1 to 7 all had good biodegradability and could be suitably used in the pocket tissue of the present invention. On the other hand, the film of Comparative Example 1 was inferior in biodegradability and could not be used for the pocket tissue of the present invention.

[0053]

As described above, according to the present invention, in a pocket tissue in which laminated tissue paper is packaged in a bag made of a film, the film is a biodegradable aliphatic polyester and a biodegradable aliphatic- Since it is made of at least one polymer selected from the group consisting of aromatic copolyester and biodegradable polyester carbonate copolymer, the bag for packaging the tissue paper has a biodegradable polymer. Since it is formed by a film made from, the bag body can be decomposed by microorganisms even if it is discarded in the natural environment, and therefore it should not adversely affect the natural environment. You can

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B65D 65/46 B65D 65/46 C08L 67/02 C08L 67/02 67/04 67/04 F term (reference) 2D034 AB01 3E014 LD01 LD05 3E086 AD01 BA02 BA15 BB90 CA35 4J002 CF03X CF04X CF18W GG02

Claims (6)

[Claims] 1. A pocket tissue in which folded and laminated tissue paper is packaged in a film bag body, wherein the film is a biodegradable aliphatic polyester and a biodegradable aliphatic-aromatic copolyester. And a biodegradable polyester carbonate copolymer, the pocket tissue comprising at least one polymer selected from the following. 2. The pocket tissue according to claim 1, wherein the elastic modulus of the film is 2.0 GPa or less. 3. The heat-sealing strength of the portions where the films are heat-sealed to form a bag body is 4 N / cm.
It is above, The pocket tissue of Claim 1 or 2 characterized by the above-mentioned. 4. The pocket tissue according to any one of claims 1 to 3, wherein the biodegradable aliphatic polyester is polylactic acid. 5. The film is formed of a resin composition containing polylactic acid and a biodegradable aliphatic-aromatic copolyester having a glass transition temperature of 0 ° C. or less as constituent components. The pocket tissue according to any one of claims 1 to 4. 6. The pocket tissue according to any one of claims 1 to 5, wherein the biodegradable aliphatic-aromatic copolyester has a heat of crystal fusion of 25 J / g or less.