JPH11152146A - Thermoplastic resin bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent extraordinary temperature-rise within an incineration furnace, and also prevent dispersion of noxious gas and leakage of a toxic substance in incineration residual ashes by incorporating an inorganic compound having a BET specific surface area of a specific value or more after incineration in thermoplastic resin at a specific ratio relative to bag total weight. SOLUTION: As a material of a bag, thermoplastic resin is filled with an inorganic compound having a BET specific surface area of 30 m<2> /g or more after incineration at 10-50 wt.% relative to the bag total weight. Aluminum hydroxide (zeolite, clay, silicate or the like) is appropriate as an inorganic compound. Aluminum hydroxide releases crystal water in a high temperature condition in an incineration furnace, and is transited to an active alumina (transition alumina) having a high specific surface area. The reaction has an effect to reduce a combustion temperature in a furnace. An inorganic compound having a BET specific surface area of 30 m<2> /g or more after incineration absorbs harmful components such as HCl, dioxin, etc. In addition, the compound absorbs heavy metal ions in incineration residual ashes, and prevent them from being dissolved in reclaimed land.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag made of a thermoplastic resin, and more particularly, to a bag used as a garbage bag or a shopping bag. In the case of incineration treatment with garbage, it suppresses abnormal heat generation in the incinerator and suppresses the emission of harmful gas components such as dioxin generated during incineration from the incinerator. The present invention relates to a thermoplastic resin bag having an environmental protection function, which has an effect of suppressing leakage of contained heavy metal ions and the like.

[0002]

2. Description of the Related Art In recent years, the amount of household waste and commercial waste has increased along with the increase in income level, and disposal of these wastes has become a very serious problem in each local government. From the viewpoints of resource saving, resource recycling, and environmental protection, these garbage are often separated from non-combustible garbage and combustible garbage after being collected for various valuable components, and then subjected to landfill or incineration. .

[0003] By the way, combustible garbage normally discharged from ordinary households is collected in a garbage bag made of a thermoplastic resin such as polyethylene or a shopping bag (plastic bag) distributed and sold at general retail stores and the like. It is generally incinerated in an incinerator. However, such incineration has the following problems at present. In other words, the thermoplastic resin, which is the raw material of the garbage bag, generates a large amount of heat during incineration, the temperature inside the incinerator rises abnormally, and the incinerator material is severely damaged. Vinyl chloride, vinylidene chloride (for food packaging) When burning chlorine-containing resins such as wraps), harmful dioxins may be released to the atmosphere,
When the incineration residual ash is landfilled, heavy metal ions contained in the ash may be dissolved in rainwater or the like at the landfill and may leak.

[0004] As a method for addressing such a problem, for example, with respect to a temperature rise in an incinerator, a method of suppressing the temperature rise in the incinerator by spraying water on the incinerated material in the incinerator,
There is a method in which a resin filled with calcium carbonate is used as a raw material for a garbage bag or the like to reduce the combustion heat of the resin itself.
On the other hand, there are measures to reduce dioxin emissions into the atmosphere from both directions of reducing the generation of dioxins themselves and adsorbing and collecting dioxins. A method of completely combusting combustibles and suppressing the generation of dioxin precursors by controlling the operation of furnaces and introducing new types of furnaces, as described in the incinerator operation guidelines set by the Agency, can be cited. Further, as the latter adsorption and recovery measure, for example, there is a method in which activated carbon or the like is charged into a bag filter portion of a dust collector. Examples of a method for preventing leakage of harmful substances at the time of landfill include a method of insolubilizing a contained harmful substance, and then solidifying it with cement or the like and disposing of it by landfill.

[0005] However, all of these methods are:
Individual measures should be taken according to each purpose, such as protection of refractory materials for furnaces, prevention of dioxin scattering due to new installation and modification of facilities, and prevention of leakage of heavy metal ions from incineration ash. Since simultaneous processing requires enormous processing costs, a method that is inexpensive and that can solve both problems simultaneously has been desired.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to prevent abnormal temperature rise in an incinerator during operation of the incinerator and to prevent harmful gases such as dioxin from being scattered into the atmosphere while preventing damage to the furnace material. It is an object of the present invention to provide a thermoplastic resin bag which is effective in preventing harmful substances such as heavy metal ions contained in incineration ash from dissolving and leaking in a landfill.

Under these circumstances, the present inventors have conducted intensive studies to achieve the above object. As a result, a thermoplastic resin bag containing a specific amount of a specific inorganic compound has a sufficient mechanical strength. In addition to exhibiting the function as a bag, when it is used as a garbage bag, it is incinerated together with combustible garbage, solving all the above problems in the garbage incineration process at the same time, and finding that it satisfies all its purposes. Thus, the present invention has been completed.

[0008]

That is, the present invention provides a thermoplastic resin having a BET specific surface area of 30 m ² / g after combustion.
The present invention provides a thermoplastic resin bag containing the inorganic compound described above in an amount of more than 10% by weight and 50% by weight or less based on the total weight of the bag.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. A feature of the present invention is that an inorganic compound having a BET specific surface area of 30 m ² / g or more after burning is added to a thermoplastic resin as a material of the bag in an amount of more than 10% by weight and 50% by weight or less based on the total weight of the bag, preferably 15 to 50% by weight. After being used as a garbage bag, the thermoplastic resin bag having such a configuration is collected at a local government or the like and incinerated with other combustible materials. At this time, the inorganic compound kneaded and used in the resin is diluted with the combustible material. The effect reduces the combustion temperature in the furnace.

[0010] Particularly, when the resin contains aluminum hydroxide, it releases crystallization water under high temperature conditions in an incinerator and is transformed into activated alumina (transition alumina) having a high specific surface area. That this reaction is an endothermic reaction,
Further, it has the effect of reducing the combustion temperature in the furnace by the combustible substance dilution effect.

Further, after combustion in an incinerator, an inorganic compound having a BET specific surface area of 30 m ² / g or more exhibits an effect of adsorbing toxic components such as HCl and dioxin contained in the combustion exhaust gas. Furthermore, when the incineration residue ash and fly ash containing the inorganic compound are disposed of in landfill, the inorganic compound also has an effect of adsorbing heavy metal ions contained in the ash and preventing leakage.

Incinerators generally used for incineration of garbage in local governments and establishments equipped with incineration facilities include stoker incinerators and fluidized bed incinerators in many cases. The incineration temperature of the garbage in the incinerator is usually about 500 ° C. to about 1100 ° C., but the inorganic compound to be present in the thermoplastic resin garbage bag of the present invention has a BET specific surface area after incineration at that temperature atmosphere. Is required to be 30 m ² / g or more.

[0013] Such an inorganic compound usually has a BET specific surface area of 30 at room temperature, such as aluminum hydroxide.
m ² / be less than g BET specific surface area after the incineration others becomes more 30m ² / g, or BET specific surface area of 30m at room temperature ² / g or more and after combustion even 30m a BET specific surface area of ² / g or more of inorganic compounds.

The type of aluminum hydroxide used in the present invention is generally gibbsite, bayerite, boehmite, nortostrandite, etc. Among them, gibbsite is a large amount as a raw material for alumina and aluminum by the Bayer method. Since it is produced, it can be easily used and can be obtained at low cost, so that it is preferably used.

On the other hand, the inorganic compound is not particularly limited.
However, in general, zeolite, clay, silicate, activated white
Earth, activated alumina and the like. Zeolite is Al,
It is a hydrated silicate of Na and Ca. The general formula is WmZnO_Two
n ・ SH_Two O (W = Na, Ca, K, Ba, Sr, Z
= Si + Al (Si: Al> 1), S is constant
No). Type A, Ho
There are jasite type (X, Y type) and ZSM-5 type. clay
Is mainly composed of silicon, Al, Fe, Mg, alkali gold
Genus, water, etc. Alofe to typical
, Kaolin, talc, saponite, hallosite, pie
Loferrite, Montmorillonite, Beiderite, Non
Tronite, permiculite, illite, sepiolai
And Attapulgite. In addition, silicate is
Consisting of iodine and metal oxide, general formula xMnO.ySiO
It is represented by 2. Inorganic ion exchangers include
Water zirconia, hydrous titania, hydrous antimony, etc.
Oxides or hydroxides of valent metals, zirconium phosphate,
Titanium phosphate, zirconium arsenate, tin arsenate, phosphate
Acid salts of polyvalent metals such as lium, NH_FourPMo₁₂O₄₀・
nH_TwoA heteropoly acid represented by O or the like, KCu [Fe (C
N)₆], Sn [Fe (CN)₆] / NH_TwoSuch as O
Soluble ferrocyanide compound, other hydroxyapatite
, Hydrotalcite, alkali metal titanate, cubic
Crystal antimony, spinel-type manganese oxide, etc.
It is. Activated alumina is a type of alumina oxide.
Formula Al_TwoO _ThreeΓ, δ, κ, η,
Seeds such as θ, σ, χ, ι, ρ, amorphous alumina, etc.
Shows various crystal forms, preferably in θ, γ, χ, η, ρ
is there.

Since the aluminum hydroxide used in the present invention has water of crystallization, the BET specific surface area before combustion is 3%.
30 m ² with even less than 0 m ² / g, releasing water of crystallization thermally decomposed by the high temperature combustion conditions within the incinerator
/ G or more to transition alumina (active alumina) having a high specific surface area. In particular, the BET specific surface area of gibbsite, which is preferably used among the aluminum hydroxides exemplified above, is usually 10 m ² / g or less before combustion. The crystal form of transition alumina produced by the thermal decomposition of these aluminum hydroxides varies depending on the crystal form of the raw material aluminum hydroxide and combustion conditions, but is usually θ, γ, χ, η, ρ-alumina.

The inorganic compound used in the present invention, it is essential BET specific surface area after combustion is about 30 m ² / g or more, preferably a BET specific surface area of about 50 m ² / g to
The upper limit of the BET specific surface area is not particularly limited, but is preferably about 300 m ² / g. On the other hand, if the lower limit of the BET specific surface area is less than 30 m ² / g, the ability to adsorb harmful gases such as dioxin and heavy metal ions decreases.

The combustion conditions of the inorganic compound in the present invention are in accordance with the combustion temperature in an incinerator, and the incineration temperature in a stoker type incinerator or a fluidized bed type incinerator, which is currently frequently used, is about 500 ° C. to about 500 ° C. 1100 ° C, preferably about 500 ° C
To 1000 ° C, more preferably from about 600 ° C to about 900 ° C
After burning, the BET specific surface area is measured. However, in the present invention, the BET specific surface area of the powder after heat treatment at 800 ° C. for 30 minutes may be about 30 m ² / g or more.

The size of the inorganic compound used in the present invention is usually one having a central particle size of 50 μm or less and a maximum particle size of 100 μm or less. Preferably, the central particle diameter is about 15 μm or less, and more preferably, the central particle diameter is 1 μm to 1 μm.
It is 0 μm. When particles having a center particle diameter exceeding 50μ or particles having a maximum particle diameter exceeding 100μ are used, the tensile strength of the thermoplastic resin bag of the present invention may decrease when it is contained in the bag. The center particle size was measured using a laser diffraction particle size distribution analyzer.

In the thermoplastic resin bag of the present invention, in addition to the inorganic compound having a BET specific surface area of 30 m ² / g or more after burning, other inorganic fillers are simultaneously contained as long as the effects of the present invention are not hindered. No problem. Examples of such an inorganic filler include calcium carbonate, talc, titanium oxide, aluminum oxide, iron hydroxide and the like. Of these, calcium carbonate is particularly preferred. Calcium carbonate, like aluminum hydroxide, has the effect of neutralizing hydrogen chloride gas generated by the burning of dust and suppressing the generation of acid gas.

In the present invention, the content of the inorganic compound having a BET specific surface area after burning of 30 m ² / g or more contained in the thermoplastic resin is from 10% by weight to 50% by weight based on the total weight of the bag.
%, Preferably 15% to 50% by weight. When the content is less than 10% by weight, the effect of suppressing the calorific value is insufficient when the thermoplastic resin bag containing the same is incinerated. Sufficient effects are not exerted on adsorption. On the other hand, if it exceeds 50% by weight, the mechanical strength of the film constituting the thermoplastic resin bag containing the same decreases, and the amount of residual ash increases. Even when other inorganic fillers are used in combination, the addition amount is preferably 50% by weight or less based on the total weight of the bag for the same reason as described above.

In the present invention, the thermoplastic resin bag contains
30m BET specific surface area after combustion ^Two/ G or more
Organic compounds and other inorganic fillers used with them
It can be used after surface treatment. Such surface treatment
Any known method may be used.
As the surface treatment agent used in the method, for example, stear
Fatty acids such as phosphoric acid and derivatives thereof, paraffin, wax
Organic silane, organic titanate and the like. Heel
The surface treatment of the thermoplastic resin bag of the present invention
In addition to improving the resin molding processability,
To improve the dispersibility of inorganic compounds and fillers in resins
The mechanical strength of the film that composes the thermoplastic resin bag
Can be improved.

The thermoplastic resin bag of the present invention may contain, if necessary, a processing aid, an antioxidant, a pigment, a concealing agent, an antistatic agent, a deodorant, a deodorant, a repellent for insect pests and the like. Additives can also be included. The method for producing the thermoplastic resin bag of the present invention is not particularly limited, and any method can be used as long as the effect of the present invention is not hindered. Examples of the method include, for example, a thermoplastic resin such as polyethylene and an inorganic compound having a BET specific surface area of 30 m ² / g or more after burning;
Furthermore, if necessary, an inorganic filler, other additives, etc. are added and mixed, and these are kneaded under heating to obtain a resin composition having a uniform composition. Then, a film is formed by an inflation molding method, a T-die molding method, or the like. And finally manufactured through a bag making process such as heat pressing and cutting.

In the above method, the BET specific surface area after burning is 30 m ² /
g or more of an inorganic compound, an inorganic filler, and other additives are kneaded together with a resin, and a master batch is generally prepared in which the concentration of the compound with respect to the resin is increased to about 50% by weight to 90% by weight. It is a target. A pressure kneader, a Banbury mixer, a single-screw extruder, a twin-screw extruder, or the like is used for preparing the master batch.

The master batch prepared by the above method is
A resin for diluting the masterbatch and, if necessary, additives and the like are mixed, and heated and kneaded by a device such as a single screw extruder, and the resin composition in a molten state is blown and molded by a T-die molding method. The film can be formed into a film having a predetermined thickness by a method such as the above, and then subjected to a bag making process.

Although the thickness of the film constituting the thermoplastic resin bag of the present invention is not particularly limited, it is usually about 20 μm to
It is used with a thickness of about 150 μm. Thickness 2
If it is less than 0 μm, the mechanical strength is low, while
If it exceeds μm, it may be difficult to handle as a bag.

Although the tensile strength of the film constituting the thermoplastic resin bag of the present invention thus obtained is not unique depending on the type of the thermoplastic resin used, it is generally used.
When measured by the measurement method of Japanese Industrial Standards (JIS) K-6781, the strength is about 250 kg / cm ² or more in the machine direction (MD) and about 150 kg / cm ² or more in the transverse direction (CD). For example, it sufficiently satisfies the mechanical strength required as a garbage bag or the like.

When a transparent thermoplastic resin is used as the raw material thermoplastic resin, translucent thermoplastic resin bags can usually be obtained, and various bags such as garbage bags and shopping bags can be obtained. Etc. can be applied. In addition, the thermoplastic resin bag of the present invention exerts an even more specific effect when a combustible material is put into the bag and incinerated as combustible waste.

At present, incinerators frequently used are stoker type incinerators and fluidized bed incinerators, and the incinerator usually has an incineration temperature of about 500.degree. C. to about 1100.degree. C., preferably about 500.degree. 1000 ° C, more preferably from about 600 ° C to about 900 ° C. The inorganic compound contained in the thermoplastic resin bag of the present invention has a BET specific surface area of 30 m ² / g or more after incineration in the temperature atmosphere. When aluminum hydroxide is contained in the bag, activated alumina having a large BET surface area (transition of aluminum hydroxide) has a very high ability to adsorb harmful gas and heavy metal ions while releasing water of crystallization. (Alumina). When the bag contains an inorganic compound having a BET specific surface area of 30 m ² / g or more, the bag itself exhibits high gas adsorption ability and heavy metal ion adsorption ability.

The amount of the plastic resin bag of the present invention at the time of incineration is defined as 0. 1 in terms of the total amount of the inorganic compound having a BET specific surface area of 30 m ² / g or more after combustion with respect to the entire incinerated material. It is preferably about 001% to 30% by weight, more preferably about 0.01% to 20% by weight. This amount does not need to be entirely supplied by the plastic resin bag of the present invention, and the BET specific surface area after burning is separately 30 m ² / g in the form of powder or another molded body.
The inorganic compound described above may be present in the firing furnace. There is no particular limitation on the shape and size of the inorganic compound to be present in the furnace as described above, but if it is a powder, the center particle diameter is usually about 0.1 μ to 200 μ, preferably about 1 μ to 100 μ. Is used.

[0031]

The thermoplastic resin bag of the present invention described in detail above satisfies the physical properties such as mechanical strength required for ordinary resin bags, and of course, incinerates it with other refuse. In order to prevent abnormal temperature rise in the incinerator, suppress damage to the furnace, promote combustion, suppress the generation of unburned products such as carbon monoxide, and reduce hydrogen chloride gas generated from chlorine-containing resin. It is also possible to adsorb harmful exhaust gas such as dioxin caused by it and suppress its emission, and also adsorb harmful substances such as heavy metal ions contained in incineration ash to prevent leakage from landfill. Therefore, its industrial value as an invention contributing to environmental protection is extremely large.

[0032]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples.

Example 1 Melt flow rate 0.05 g / 10 min, density 0.
Using a high-density polyethylene of 95 g / cm ³ and aluminum hydroxide (manufactured by Sumitomo Chemical Co., Ltd.) at the ratio (parts by weight) shown in Table 1, a thickness of 30 μm and a folded diameter were obtained by an inflation molding machine equipped with a single screw extruder. A 500 mm cylindrical thermoplastic resin film was produced. Next, the film was heat-sealed to obtain a bag having a length of 700 mm. The tensile strength of the film constituting the obtained bag was measured in accordance with Japanese Industrial Standard JIS-K6781. Table 1 shows the results. In Experimental Examples 1 and 3, the central particle size was 6 μm.
m, aluminum hydroxide having a maximum diameter of 25 μm was prepared in Experimental Example 2
In this case, aluminum hydroxide having a central particle diameter of 3 μm and a maximum diameter of 15 μm was used. The tensile strength data is shown as the median value of the results of ten measurements, with the molding direction being the longitudinal direction (MD) and the perpendicular direction being the transverse direction (CD). From the results in Table 1, it can be seen that the thermoplastic resin bags of Experimental Examples 2 and 3 have sufficient mechanical strength.

[0034]

【table 1 】

Example 2 100 parts by weight of a high-density polyethylene film containing 30% by weight of aluminum hydroxide powder (center particle diameter 8 μm, manufactured by Sumitomo Chemical Co., Ltd.), and high-density polyethylene containing no aluminum hydroxide powder at all Film 10
0 parts by weight were burned, and the calorific value was measured using a cylinder calorimeter. As a result, the heat of combustion of the high-density polyethylene film containing the aluminum hydroxide powder was 7%.
791 cal / g, not containing 11200 cal
/ G. From these results, it can be seen that the thermoplastic resin bag composed of the high-density polyethylene film containing the aluminum hydroxide powder has a low combustion heat during incineration and can prevent an abnormal temperature rise in the incinerator. I understand.

Example 3 A high-density polyethylene film containing 30% by weight of aluminum hydroxide was obtained in the same manner as in Experimental Example 2 of Example 1, and this was burned in an electric furnace together with wood pieces and cardboard, and incinerated. Residual ash was obtained. This incineration residue ash was substantially activated alumina, and its BET specific surface area was 105 m ² / g. 5 m high-density polyethylene film containing 1.5 mg of the above incinerated residue ash and 30% by weight of aluminum hydroxide
g and 10 mg of vinyl chloride powder were put into a plastic combustion tester PCT (manufactured by Sugiyama Genryiki) and the combustion temperature was set to 7
The combustion was performed under the conditions of 50 ° C., an air supply amount of 0.5 L / min, and a combustion time of 10 minutes, and a combustion test was performed. JIS-K721
7 and the hydrogen chloride gas generated at this time was 20 mM
After absorption with sodium carbonate, it was quantified by silver nitrate titration. As a result, the detected amount of hydrogen chloride gas was 4.2 mg.
On the other hand, the above incinerated residue ash and aluminum hydroxide 30% by weight
When a combustion test was performed in accordance with the above method except that 5 mg of a high-density polyethylene film containing no aluminum hydroxide was used instead of using a high-density polyethylene film containing 0.1 mg. From these results, it can be seen that a thermoplastic resin bag made of a high-density polyethylene film containing aluminum hydroxide suppresses discharge of hydrogen chloride gas when incinerated.

Example 4 10 g of municipal solid waste incineration ash and 4 g of the same incineration ash used in Example 3 (activated alumina having a BET specific surface area of 105 m ² / g) were added to 90 g of distilled water, followed by 6 hours. After shaking, solid-liquid separation was performed, and the concentration of heavy metal ions in the aqueous solution was measured with an atomic absorption spectrophotometer. As a result, the concentration of heavy metal ions in the aqueous solution was as follows: Cr: 0.07 ppm, Pb: 0.01 pp
m, Cu: 0.06 ppm. On the other hand, for comparison, only 10 g of municipal waste incineration residue ash was added to 90 g of distilled water, and shaken for 6 hours in the same manner as above, followed by solid-liquid separation.
When the heavy metal ion concentration in the aqueous solution was measured, the heavy metal ion concentration in the aqueous solution was Cr: 0.11 ppm, P
b: 0.04 ppm and Cu: 0.13 ppm. Based on these results, the thermoplastic resin bag composed of high-density polyethylene film containing aluminum hydroxide adsorbs heavy metal ions contained in municipal waste incineration residual ash by incineration and exhibits the effect of suppressing its emission. You can see that

Example 5 90 g of an aqueous solution containing 100 ppb of Hg ions was prepared, and the same incineration residue (BE) as used in Example 3 was added thereto.
After adding 4 g of activated alumina having a T specific surface area of 105 m ² / g, the mixture was shaken for 6 hours, and then subjected to solid-liquid separation, and the Hg ion concentration in the aqueous solution was measured. As a result, the Hg ion concentration in the aqueous solution was 22 ppb. From these results, it can be seen that the thermoplastic resin bag composed of the high-density polyethylene film containing aluminum hydroxide exhibits the effect of absorbing Hg ions by incineration and suppressing its discharge.

Example 6 Assuming continuous incineration of refuse on a commercial basis, a high-density polyethylene film containing 30% by weight of aluminum hydroxide powder (central particle size: 3 μm, manufactured by Sumitomo Chemical Co., Ltd.) was mixed with wood chips and cardboard. It was burned in an electric furnace to obtain incineration residual ash. This incineration ash was substantially activated alumina and had a BET specific surface area of 114 m ² / g.
A gas chromatograph column (outer diameter 5 mm, inner diameter 3 mm, length 50 cm) filled with 0.5 g of the incineration residue ash was set on a gas chromatograph, and a carrier gas (N ₂ ) was passed while keeping the temperature at 200 ° C. 0.2 ml of a 0.8 μg / ml dioxin / n-hexane solution was injected in four portions with a 50 μl syringe over 2 minutes. The dioxin / n-hexane solution used was 1,3,6,8-tetrachlorodibenzodioxin, 1,2,4,7,8-pentachlorodibenzodioxin, 1,2,6,7-tetrachlorodibenzofuran, , 3,4,7,8-pentachlorodibenzofuran at 1.2 μg / ml each. After injecting the dioxin / n-hexane solution, the carrier gas was kept flowing for 5 minutes, then the heater and the carrier gas were stopped, and the apparatus was rapidly cooled. After cooling, the incineration ash (activated alumina) in the column was taken out, and the amount of dioxin contained in the incineration ash (activated alumina) was analyzed. The analysis used a method based on the "Manual for Standard Measurement and Analysis of Dioxins in Waste Disposal (February 1997)" prepared by the Environment Improvement Section of the Water Environment Department of the Ministry of Health and Welfare. The results are shown in Table 2.

Comparative Example 1 In Example 6, the incineration ash (activated alumina) was replaced with
The measurement was performed according to Example 6, except that the incineration residue ash prepared by the following procedure was used. 30% by weight calcium carbonate
Was burned in an electric furnace together with wood pieces and cardboard to obtain incineration residual ash.
The main component of this incineration ash is calcium carbonate.
The ET specific surface area was 4 m ² / g. The results are shown in Table 2.

Comparative Example 2 In Example 6, the incineration residue ash (activated alumina) was replaced with
The measurement was performed according to Example 6, except that activated carbon having a BET specific surface area of 1200 m ² / g was used. The results are shown in Table 2.

[0042]

[Table 2]

From the results shown in Table 2, it can be seen that the thermoplastic resin bag made of the high-density polyethylene film containing aluminum hydroxide exhibits the effect of adsorbing dioxin by incineration and suppressing its emission. Further, it can be seen that the effect is superior to activated carbon.

Claims (4)

[Claims] 1. A thermoplastic resin bag containing an inorganic compound having a BET specific surface area of at least 30 m ² / g after burning in an amount of more than 10% by weight and not more than 50% by weight based on the total weight of the bag. . 2. The thermoplastic resin according to claim 1, wherein the inorganic compound is at least one selected from the group consisting of aluminum hydroxide, zeolite, clay, silicate, activated clay and activated alumina. Bag making. 3. The thermoplastic resin bag according to claim 1, wherein the inorganic compound is aluminum hydroxide. 4. The thermoplastic resin bag according to claim 1, wherein the inorganic compound is activated alumina.