JP2003026185A - Thermoplastic resin-made bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thermoplastic resin-made bag showing effects in suppressing scatter of toxic gases such as dioxin and the like into the atmosphere while keeping a temperature of an incineration furnace from abnormally increasing to thereby suppress damage of the furnace during operation of the incineration furnace and preventing harmful substances such as heavy metal ions contained in the incineration ash from dissolving in a reclaimed ground and leaking. SOLUTION: A thermoplastic resin-made bag contains more than 10 wt.% to not more than 50 wt.% of an inorganic compound (zeolite, silicate, active clay, active aluminum or the like) showing a BET specific surface area of not less than 30 m<2> /g after being heat-treated for 30 minutes at 800 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a thermoplastic resin bag.
Related, and more specifically, a machine as a garbage bag or shopping bag.
Noh, of course, can be used in a garbage incinerator after using it.
Abnormalities in the incinerator when incinerated with combustible waste
Dioxin generated during incineration while suppressing excessive heat generation
Harmful gas components are prevented from being discharged from the incinerator.
Reduce leakage of heavy metal ions etc. contained in combustion residue ash.
Thermoplastic tree with environmental protection function that has the effect of controlling
It relates to a bag made of fat. [0002] 2. Description of the Related Art Recently, household garbage has been increasing due to rising income levels.
And the amount of commercial waste is increasing.
This is a very big problem for local governments. This
These garbage can save resources, recycle resources, and protect the environment.
From the point of view, after collecting various valuable components,
It is separated into combustible waste and is subject to landfill or incineration.
In many cases. [0003] By the way, the flammable fuel usually released from ordinary households
Garbage is a garbage bag made of thermoplastic resin such as polyethylene.
And shopping bags distributed and sold at general retail stores, etc.
(Plastic bag) and incinerated in an incinerator.
General. However, in such incineration,
At present, the following problems have arisen. That is, garbage
Thermoplastic resin, which is a raw material for bags, generates a large amount of heat during incineration.
The temperature inside the incinerator rises abnormally, causing damage to incinerator materials.
Violent, vinyl chloride, vinylidene chloride (food packaging
Harmful when burning chlorine-containing resin such as
Dioxins could be released to the atmosphere,
When the incinerated ash is landfilled, it is not included in the ash.
Heavy metal ions dissolve in rainwater at landfills and leak
And the like. [0004] As a method for addressing such problems,
For example, if the temperature in the incinerator rises,
Methods to control the temperature rise in the furnace by spraying water on
Uses resin filled with calcium carbonate for raw materials such as garbage bags
However, there is a method of reducing the heat of combustion itself.
On the other hand, for emission of dioxin into the atmosphere,
Direction and reduction of oxin generation itself
Measures for adsorbing and recovering toxin from both directions
In order to prevent the former, the Japan Environment Agency
Oven operation described in the specified incinerator operation guidelines
Complete combustion of combusted materials through management and introduction of new furnaces
Method to suppress generation of dioxin precursor
Can be For the latter adsorption recovery measure,
For example, put activated carbon etc. into the bag filter of the dust collector.
Method. In addition, harmful substances at the time of landfill
As a method for preventing material leakage, for example,
After insolubilizing it, it is solidified with cement etc.
Landfill disposal methods and the like can be mentioned. However, all of these methods are:
Furnace composition Refractory material protection, equipment installation / remodeling
Prevents scattering of toxins, leakage of heavy metal ions from incineration ash
Individual measures are taken according to each purpose, such as prevention.
There is a huge processing cost to perform all measures simultaneously
Required, inexpensive and both problems at the same time
There has been a demand for a method that can solve the problem. [0006] SUMMARY OF THE INVENTION An object of the present invention is to provide incineration.
During operation of the furnace, abnormal temperature rise inside the incinerator is prevented, and
Hazardous gases such as dioxin enter the atmosphere while suppressing wounds
Suppresses scattering and prevents heavy metals contained in incineration ash
To prevent harmful substances such as on from dissolving and leaking at landfill sites.
Providing thermoplastic bags that are effective in stopping
It is in. [0007] In view of such circumstances, the present inventors have proposed the above
As a result of intensive studies to achieve the target, certain inorganic compounds
Thermoplastic bags containing a certain amount of
In addition to having strength and functioning as a bag,
When used as a bag, it is incinerated with combustible
All of the above problems in incineration are solved simultaneously
And found that all the objectives were satisfied,
It was completed. [0008] That is, the present invention provides a heat-resistant
B after heating at 800 ° C. for 30 minutes in a plastic resin
ET specific surface area is 30m^Two/ G or more of an inorganic compound,
Contains more than 10% by weight and not more than 50% by weight based on the total weight of the bag
A thermoplastic resin bag. [0009] BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.
I do. The feature of the present invention is that the thermoplastic resin is used as the material of the bag.
Has a BET specific surface area of 30 m after combustion.^Two / G or more
More than 10% by weight of inorganic compound and 50 weight
%, Preferably 15 to 50% by weight
I did it. Thermoplastic resin bag having such a configuration
Is used as a garbage bag and collected by local governments
And is incinerated with other combustible materials.
The inorganic compound used during kneading is
Reduce combustion temperature. [0010] Particularly, aluminum hydroxide is contained in the resin.
If contained, release crystallization water under high temperature conditions in the incinerator.
Activated alumina with high specific surface area
Lumina). That this reaction is an endothermic reaction,
Furthermore, the combustion temperature in the furnace is reduced by the combustible substance dilution effect.
Has the effect of reducing Further, the BET ratio after combustion in the incinerator
30m surface area^Two / G or more of inorganic compounds
Adsorbs toxic components such as HCl and dioxin
It also has the effect of The incineration residue further containing the inorganic compound
When ash and fly ash are disposed of by landfill, the inorganic compound
Absorbs heavy metal ions contained in ash and prevents leakage
It also has effects such as [0012] Local governments and establishments with incineration facilities
Incinerators commonly used for incineration of garbage are stokers.
There are many incinerators and fluidized bed incinerators. Garbage in the incinerator
The incineration temperature is usually from about 500C to about 1100C
Is present in the thermoplastic resin garbage bag of the present invention.
BET specific surface area after incineration in this temperature atmosphere
Is 30m^Two / G or more must be applied.
And [0013] Such an inorganic compound is, for example, an aluminum hydroxide.
At room temperature, such as minium, the BET specific surface area is usually 30.
m^Two / G is less than the BET specific surface area after incineration
30m^Two / G or more, or BET ratio table at normal temperature
Area is 30m^Two / G or more and BET specific surface area after combustion
30m^Two / G or more inorganic compounds
You. The species of aluminum hydroxide used in the present invention
Species are generally gibbsite, bayerite, boehmite
And Nordstrandite, among which
Also gibbsite is alumina, aluminum
Easily and inexpensively because it is produced in large quantities as a raw material
It is preferably used because it is available. 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_TwoO (W = Na, Ca, K, Ba, Sr, Z =
Si + Al (Si: Al> 1), S is not constant
). A type, fauja due to the difference in its skeletal structure
There are site type (X, Y type) and ZSM-5 type. Clay is silicon
Al, Fe, Mg, alkali metal, water
And so on. Allophane and Khao are typical
Phosphorus, talc, saponite, hallosite, pyrofera
Light, montmorillonite, beidellite, nontrony
G, permiculite, illite, sepiolite, ata
There is Pulgite. Silicates are silicon dioxide and gold.
Consisting of oxides of the same group and having the general formula xMnO.ySiO2
Be forgotten. As the inorganic ion exchanger, hydrated zircon
Of polyvalent metals such as near, hydrated titania and hydrated antimony
Oxide or hydroxide, zirconium phosphate, titanium phosphate
Tan, zirconium arsenate, tin arsenate, cerium phosphate
Which polyvalent acid salt, NH_Four PMo₁₂O₄₀・ NH_TwoO
Heteropolyacid represented by KCu [Fe (C
N)₆], Sn [Fe (CN)₆ ] / NH_TwoInsoluble such as O
Ferrocyanide compound, other hydroxyapatite,
Hydrotalcite, alkali metal titanate, cubic
Antimony, spinel-type manganese oxide, etc.
You. Activated alumina is a type of alumina oxide and has the general formula
Al_TwoO_ThreeΓ, δ, κ, η, θ,
σ, χ, ι, ρ, amorphous alumina, etc.
Shows a crystal form, preferably θ, γ, χ, η, ρ
You. The aluminum hydroxide used in the present invention is a crystal
Since it has water, the BET specific surface area before combustion is 3
0m^Two / G, even if less than the above-mentioned high temperature combustion in the incinerator
Decomposes under the condition, releases water of crystallization and 30m^Two
/ G or more transition alumina (active Al
Transfer to Mina). In particular, the aluminum hydroxide described above
BET ratio table of gibbsite which is preferably used in um
Area is usually 10m before burning^Two / G or less. these
Of transition alumina produced by thermal decomposition of aluminum hydroxide
The crystal type is the crystal type of aluminum hydroxide, the raw material, and combustion
Normally θ, γ, χ, η, ρ- aluminum
Na. The inorganic compound used in the present invention is obtained after combustion.
BET specific surface area is about 30m^Two / G or more is essential
And preferably has a BET specific surface area of about 50 m^Two / G ~
About 300m^Two / G, but the upper limit of the BET specific surface area is
There is no particular limitation, and the larger the better. On the other hand, BET specific surface area
30m^Two / G is less than
The ability to adsorb harmful gases and heavy metal ions such as
You. In the present invention, the combustion conditions of the inorganic compound are as follows:
It is based on the combustion temperature in the incinerator and is currently used frequently.
Temperature in a stalking incinerator or fluidized bed incinerator
About 500 ° C. to about 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 heat treatment is simply performed at 800 ° C. for 30 minutes.
BET specific surface area of powder after applying^Two / G or less
It may be above. The size of the inorganic compound used in the present application is generally
Usually, the center particle size is 50μ or less, and the maximum particle size is 100μ or less
belongs to. Preferably, the central particle diameter is about 15 μm or less
And more preferably the central particle diameter is 1 μm to 1 μm.
The thickness is 0 μm. Particles whose central particle diameter exceeds 50μ
If particles with a maximum particle size exceeding 100μ are used,
When contained in the thermoplastic resin bag of the invention, the tensile strength of the bag
May decrease. Laser for measuring the central particle size
A diffraction particle size distribution analyzer was used. In the thermoplastic resin bag of the present invention, the present invention
As long as the light effect is not hindered, the BET specific surface area after combustion is
30m^Two / G or more, and other inorganic charge
A filler may be contained at the same time. Such inorganic
Fillers include calcium carbonate, talc, titanium oxide
, Aluminum oxide, iron hydroxide and the like. this
Among them, calcium carbonate is particularly preferred. Calcium carbonate
Similar to aluminum hydroxide, waste is generated by burning garbage.
Neutralizes hydrogen chloride gas and suppresses the generation of acid gas.
There is fruit. In the present invention, the thermoplastic resin contains
BET specific surface area after combustion is 30m^Two/ G or more inorganic
The content of the compound is 10% by weight to 50% based on the total weight of the bag.
%, Preferably between 15% and 50% by weight.
is there. If the content is less than 10% by weight,
The effect of suppressing the amount of heat generated when burning thermoplastic resin bags
Is insufficient, and harmful gas is adsorbed and heavy metals in residual ash
Sufficient effects are not exerted on the adsorption of ions. other
If the amount exceeds 50% by weight,
Mechanical strength of the film that composes the conductive resin bag
This also increases the amount of residual ash. Other inorganic fillers
Even when used in combination, the amount of addition is the same as above.
For reasons, it must not exceed 50% by weight based on the total weight of the bag.
Is preferred. 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
A 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 resin moldability,
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 have
First, processing aids, antioxidants, pigments, concealing agents, antistatic
Additives such as chemicals, deodorants, deodorants, repellents against pests, etc.
Can also be contained. Thermoplastic resin bag of the present invention
There is no particular limitation on the production method of
Any method can be used as long as it is possible. As an example of that method
Is, for example, a thermoplastic resin such as polyethylene and after combustion
BET specific surface area is 30m^Two / G or more of an inorganic compound,
Add inorganic fillers and other additives as needed.
Mix and knead these under heating to obtain a uniform composition
After obtaining the resin composition, inflation molding method, T-die
Formed into a film by a molding method, etc.
Press, cutting and other bag manufacturing processes
It is. In the above method, before film formation
The BET specific surface area after combustion is 30 m^Two /
g or more of inorganic compounds, inorganic fillers and other additives
Are kneaded with the resin, and their concentration with respect to the resin is adjusted.
50% to 90% by weight of the master batch
It is generally prepared. Preparation of master batch
Has a pressure kneader, Banbury mixer, single screw extrusion
And a twin-screw extruder. The master batch prepared by the above method is
Resin for diluting the masterbatch, if necessary
Mix with additives, etc. and heat knead with equipment such as single screw extruder
The resin composition in the molten state is blown
Forming a film of a predetermined thickness by the die method, T-die molding method, etc.
It can be molded and subjected to a bag making process. The filler constituting the thermoplastic resin bag of the present invention.
The thickness of the lum is not particularly limited, but 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
is there. The thermoplastic resin of the present invention thus obtained
The tensile strength of the film that makes up the resin bag
Is not unique depending on the type of thermoplastic resin,
Measured according to the measurement method of Japanese Industrial Standards (JIS) K-6781
Approximately 250 kg / cm in the vertical direction (MD)^Two Less than
Approximately 150 kg / cm in the top and side directions (CD)^Two More than
Strength and required as normal bags, for example garbage bags
Mechanical strength is sufficiently satisfied. As the thermoplastic resin as a raw material, transparent heat
When using a plastic resin, usually a translucent thermoplastic
Resin bags can be obtained and various bags, such as garbage
It can be applied to bags, shopping bags and the like. In addition, the present invention
The thermoplastic resin bag of the above, put a combustible material in the bag,
Excellent uniqueness when incinerated as combustible waste
It has a special effect. At present, incinerators that are frequently used are stokers.
Incinerators or fluidized bed incinerators.
The temperature is usually from about 500 ° C to about 1100 ° C, preferably about
500 ° C to 1000 ° C, more preferably about 600 ° C to about
900 ° C. Contained in the thermoplastic resin bag of the present invention
Ratio table after incineration in this temperature atmosphere
Area is 30m^Two / G or more. Aluminum hydroxide in the bag
When containing aluminum, aluminum hydroxide
The ability to release water and adsorb harmful gases and heavy metals
Very high ion adsorption capacity, large BET surface area
Crystal transition to active alumina (transition alumina). Ma
The bag has a BET specific surface area of 30 m^Two / G or more
High gas adsorption by itself
Demonstrates its ability and ability to adsorb heavy metal ions. The plastic resin bag of the present invention at the time of incineration
Abundance is the BET specific surface after combustion with respect to the total amount of incineration.
The product is 30m^Two / G or more of the total amount of inorganic compounds
Is preferably about 0.001% to 30% by weight.
Preferably, it is about 0.01% to 20% by weight.
More preferred. This amount depends entirely on the plastic tree of the present invention.
It does not need to be supplied in a grease bag, but can be supplied separately with powder or other components.
BET specific surface area after combustion is 30m^Two / G
Make sure that the above inorganic compounds are present in the firing furnace.
May be. The form of inorganic compounds that are present in the furnace
The shape and size are not particularly limited.
In general, the center particle size is preferably about 0.1 to 200 μm,
For example, those having a size of about 1 μ to 100 μ are used. [0031] The thermoplastic resin bag of the present invention described in detail above.
Is the physical property such as mechanical strength required for ordinary resin bags.
Satisfying, of course, incineration this with other garbage
The furnace, prevent abnormal temperature rise inside the incinerator and damage the furnace.
Promote combustion and reduce unburned products such as carbon monoxide
Generation of hydrogen chloride gas generated from chlorine-containing resin
Harmful exhaust gas such as dioxin caused by
Of heavy metal ions contained in incineration ash
Adsorb harmful substances such as waste gas and leak from landfill
It is also possible to prevent
Its industrial value as a contributing invention is extremely large. [0032] EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples.
However, the present invention is limited by the following examples.
There is no. Embodiment 1 Melt flow rate 0.05 g / 10 min, density 0.
95g / cm^Three High density polyethylene and aluminum hydroxide
(Manufactured by Sumitomo Chemical Co., Ltd.)
Parts) and inflation with a single screw extruder
By the forming machine, a cylindrical shape with a thickness of 30 μm and a folding diameter of 500 mm
A film made of a thermoplastic resin was produced. Then the fill
The bag was heat-sealed to obtain a bag having a length of 700 mm. Get
Strength of the film that composes the bag
It measured according to JIS-K6781. The results are displayed
1 is shown. 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
Then, aluminum hydroxide with a central particle diameter of 3 μm and a maximum diameter of 15 μm
Nium was used in each case. Tensile strength data is based on the molding direction.
Is the vertical direction (MD), and the perpendicular direction is the horizontal direction (CD).
And the central value of the results of 10 measurements is shown. Table 1 results
Therefore, the thermoplastic resin bags of Experimental Examples 2 and 3
It turns out that it has mechanical strength. [0034] [Table 1] Embodiment 2 Aluminum hydroxide powder (center particle diameter 8μm, Sumitomo Chemical
High-density poly containing 30% by weight dispersedly
100 parts by weight of ethylene film and aluminum hydroxide
High density polyethylene film 10 containing no powder
0 parts by weight are burned, and using a cylinder calorimeter
The amount of generated heat was measured. As a result, aluminum hydroxide powder
The heat of combustion of high-density polyethylene film containing powder is 7
791 cal / g, not containing 11200 cal
/ G. From these results, it was found that aluminum hydroxide powder
Made of high-density polyethylene film containing
Plastic resin bags have low heat of combustion during incineration, and
That it is possible to prevent abnormal temperature rise
You. Embodiment 3 Aluminum hydroxide was prepared in the same manner as in Experimental Example 2 of Example 1.
High-density polyethylene film containing 30% by weight
This is burned in an electric furnace together with pieces of wood and cardboard.
Then, incineration residue ash was obtained. This incineration ash is substantially activated
Lumina, its BET specific surface area is 105m^Two / G
there were. 1.5 mg of the above incineration residue ash, aluminum hydroxide
5m high density polyethylene film containing 30% by weight
g and vinyl chloride powder 10mg, plastic combustion
Test machine PCT (Made by Sugiyama Motoi Riki), combustion temperature 7
50 ° C, air supply 0.5 liter / min, burning time 10 min
A combustion test was performed under the conditions. JIS-K721
7 and hydrogen chloride gas generated at this time was 20 mM
After absorption with sodium carbonate, it was quantified by silver nitrate titration. So
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
Instead of using high-density polyethylene film containing
High-density polyethylene without aluminum hydroxide
In accordance with the above method, except that 5 mg
When the combustion test was performed, the detected amount of hydrogen chloride gas was
It was 5.1 mg. From these results, it was found that aluminum hydroxide
Composed of high-density polyethylene film containing film
Hydrogen chloride gas is emitted from plastic resin bags when incinerated.
It can be seen that this is suppressed. Embodiment 4 The same as that used in Example 3 with 10 g of municipal waste incineration residue ash
Remnant ash (BET specific surface area is 105m^Two / G activity
(Lumina) 4 g was added to 90 g of distilled water and shaken for 6 hours
Then, solid-liquid separation is performed and the concentration of heavy metal ions in the aqueous solution is determined by atomic absorption.
It was measured with a photometer. As a result, heavy metal ions
Concentration: Cr: 0.07 ppm, Pb: 0.01 pp
m, Cu: 0.06 ppm. On the other hand,
To add 90 g of distilled water, add only 10 g of municipal waste incineration residue ash
After shaking for 6 hours in the same manner as above, solid-liquid separation was performed,
When the heavy metal ion concentration in the aqueous solution was measured,
The concentration of heavy metal ions in Cr is 0.11 ppm, P
b: 0.04 ppm, Cu: 0.13 ppm
Was. From these results, it was found that high density containing aluminum hydroxide
Thermoplastic bag made of polyethylene film
Means heavy metals contained in municipal solid waste incineration ash
It has the effect of adsorbing ions and suppressing their emission.
I understand. Embodiment 5 Prepare 90g aqueous solution containing 100ppb Hg ion
Then, the same incineration residue as used in Example 3 (BE
T specific surface area is 105m^Two / G of activated alumina).
After shaking for 6 hours, solid-liquid separation was performed, and Hg
The ON concentration was measured. As a result, Hg ion concentration in aqueous solution
The degree was 22 ppb. From these results,
Made of high-density polyethylene film containing
Thermoplastic resin bags absorb Hg ions by incineration
It can be seen that the effect of suppressing the emission is exhibited. Embodiment 6 Assuming continuous incineration of garbage on a commercial basis, aluminum hydroxide
Powder (center particle size 3μm Sumitomo Chemical Co., Ltd.)
High density polyethylene film containing 30% by weight
Is burned in an electric furnace together with pieces of wood and cardboard and incinerated
Residual ash was obtained. This incineration ash is substantially activated alumina.
And its BET specific surface area is 114m^Two / G.
A glass color for gas chromatography filled with 0.5 g of the incineration residue ash
Gas (outer diameter 5mm, inner diameter 3mm, length 50cm)
Set on a chromatograph, hold at 200 ° C,
(N_Two ) And dioxin with a concentration of 4.8 μg / ml
0.2 ml of n / n-hexane solution in a 50 μl syringe
The injection was divided into four times for 2 minutes. Dioxin used
/ N-hexane solution is 1,3,6,8-tetrachlorodi
Benzodioxin, 1,2,4,7,8-pentachloro
Dibenzodioxin, 1,2,6,7-tetrachlorodi
Benzofuran, 1,3,4,7,8-pentachlorodibe
Each containing 1.2 μg / ml of nzofuran. Die
5 minutes after injecting oxine / n-hexane solution
Keep the gas flowing, then turn off the heater and carrier gas
The device was quenched. After cooling, the incineration residue in the column
(Activated Alumina)
D) The amount of dioxins contained therein was analyzed. Analysis is thick
Created by the Ministry of Health, Health and Welfare Bureau Water Supply Environment Department
"Manufacturers for standard measurement and analysis of dioxins in waste treatment
Manual (February 1997) ". Conclusion
The results are shown in Table 2. Comparative Example 1 In Example 6, in place of incineration residual ash (activated alumina),
Example except that incineration residue ash prepared by the following procedure was used
6 was measured. 30% by weight calcium carbonate
A high-density polyethylene film containing
The ash was burned in an electric furnace together with the incinerator to obtain incineration ash.
The main component of this incineration ash is calcium carbonate.
ET specific surface area is 4m^Two / G. The results are shown in Table 2.
Was. Comparative Example 2 In Example 6, in place of incineration residual ash (activated alumina),
BET specific surface area 1200m^Two / G of activated carbon
Was measured according to Example 6. The results are shown in Table 2.
did. [0042] [Table 2] From the results in Table 2, it was found that aluminum hydroxide was contained.
Made of high-density polyethylene film
Resin bags absorb dioxin by incineration,
It can be seen that the effect of suppressing discharge is exhibited. Also,
It turns out that the effect is superior to activated carbon.

Continuation of front page    F-term (reference) 3E023 BA03                 3E064 AA01 BA22 BA60 BB01 BC20                       EA22 EA30

Claims (1)

1. An inorganic compound having a BET specific surface area of 30 m ² / g or more after heat treatment at 800 ° C. for 30 minutes is added to a thermoplastic resin in an amount of 10% by weight based on the total weight of the bag. Over 5
A thermoplastic resin bag containing 0% by weight or less.