JPH07278359A - Resin composition for washing - Google Patents

Abstract

PURPOSE:To obtain a resin composition for washing the inside of a T die- equipped extruder, capable of easily replacing the resin in such an extruder as far as both ends of the T die when a color or resin exchange operation is to be made in a molding processing using said extruder, also capable of easily removing a colorant master batch attached to the screw feed part, in a shortened washing time with reduced amounts thereof, and having no adverse effects on the succeeding molded products. CONSTITUTION:This resin composition comprises 60-85wt.% of a low-fluidity polyolefin resin 0.3-2g/10min in melt flow rate, 10-30wt.% of a high-fluidity polyolefin resin 10-50g/10min in melt flow rate differing in kind from the above low-fluidity resin, 0.5-10wt.% of a higher fatty acid monoglyceride boric ester calcium salt, 0.1-5wt.% of zeolite, and 0.005-0.3wt.% of ethylenebisamide.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a resin composition for cleaning inside a molding machine. More specifically, the present invention relates to a resin composition for cleaning the inside of an extruder with a T-die, which is excellent in cleaning the preceding resin remaining in the extruder after molding using the extruder with a T-die.

[0002]

2. Description of the Related Art The appearance of a screw, cylinder, or the preceding resin adhering to the T-die part is mixed with the succeeding resin product when the product type is changed in a molding process using an extruder with a T-die. It causes damage. Especially when changing the type from black resin using carbon black or graphite etc. to the succeeding resin of natural color as the preceding resin, complicated work such as disassembly cleaning of the extruder and co-washing with the cleaning resin and long time They are forced to perform cleaning work that involves production suspension. In order to solve these problems, various molding machine cleaning resin compositions for cleaning the inside of the molding machine have been developed. For example, in JP-A-62-195045, 2-30% by weight of alkylbenzene sulfonic acid sodium salt in a thermoplastic resin,
A composition containing 0.5 to 10% by weight of a water-repellent compound (higher fatty acid metal salt, wax, liquid paraffin, synthetic wax, etc.) is disclosed in JP-A-63-66245. A composition containing 2 to 30% by weight and 0.05 to 5% by weight of a powdery inorganic compound having an average particle size of 0.005 to 20 μm (silicon dioxide, diatomaceous earth, etc.) is disclosed in JP-A-2-180.
No. 941 discloses a composition in which a thermoplastic resin is blended with 1 to 20% by weight of a calcium salt of a boric acid ester of higher fatty acid monoglyceride and 2 to 45% by weight of an inorganic filler.
No. 0 is a composition in which a thermoplastic resin is blended with 0.5 to 15% by weight of a boric acid ester calcium salt of higher fatty acid monoglyceride and 0.05 to 5% by weight of an inorganic compound (silicic acid anhydride etc.) having an average particle size of 0.005 to 20 μm. The number of nonionic surfactants 1 to 15 whose decomposition initiation temperature is 200 ° C or higher is disclosed in Kaisho 58-14998.
By weight, a cleaning resin composition comprising 5 to 30% by weight of metallic soap, 20 to 70% by weight of an inorganic filler and 20 to 70% by weight of an olefin resin is disclosed in JP-A-59-124999. , Consisting of inorganic filler and lubricant, the inorganic filler is about 30
A resin composition for cleaning in a molding machine is disclosed, which comprises ˜70 wt% and a lubricant of about 1-30 wt%, respectively.

However, when these cleaning resin compositions are used for cleaning the preceding colored resin in the extruder with a T-die, the cleaning resin composition flows only in the central portion of the T-die and both ends thereof are cleaned. Remains without being replaced with the resin composition for
Even if a large amount of subsequent washing resin is not easily removed, there is a problem that after the product type is switched to the subsequent resin, it suddenly peels off and contaminates the subsequent molded product. In the cleaning of the preceding resin using, the colorant master batch pellets adhering to the feed zone of the screw of the extruder with T-die are not removed by the cleaning resin composition used, and the subsequent cleaning is performed. Even if a large amount of resin for use is poured, it is not easily removed and remains, and there is a drawback in that the molded product after the product type is switched causes coloration.

[0004]

DISCLOSURE OF THE INVENTION The present inventors have conducted extensive studies to solve the above problems. As a result, the low-flowing polyolefin resin and the low-flowing polyolefin resin are different from the polyolefin, and two types of high-flowing polyolefin resin are added to two types of resins, higher fatty acid monoglyceride borate calcium salt, zeolite, and ethylene. When a resin composition containing bisamide is used for cleaning the inside of an extruder with a T-die, both ends of the T-die can be uniformly replaced with the cleaning composition, and a highly fluid polyolefin resin. With a melting point of 110 ° C. or lower,
The cleaning resin composition obtained by using low-density polyethylene or linear low-density polyethylene can easily peel off the colored pellets attached to the feeding zone of the extruder screw,
It was found that they could be removed, and the present invention was completed based on this finding. As is clear from the above description,
The object of the present invention is to easily replace both ends of the T-die with a cleaning resin composition for color change or resin change during molding using an extruder with a T-die, and a screw feeder. By developing a cleaning resin composition that can easily remove the colorant master-batch adhering to, the amount of cleaning resin used is reduced, the cleaning time is shortened, and the subsequent molded products are adversely affected. The purpose of the present invention is to provide a resin composition for cleaning the inside of an extruder with a T-die.

The present invention has the following configuration. (1) 60 to 85% by weight of a low-flowing polyolefin resin having a melt flow rate of 0.3 to 2 g / 10 minutes, a polyolefin resin different from the low-flowing polyolefin resin, and having a melt flow rate of 10 〜50g / 10min Highly fluid polyolefin resin 10〜30wt%, higher fatty acid monoglyceride borate calcium salt 0.5〜10wt%, zeolite
A resin composition for cleaning the inside of an extruder with a T-die, which comprises 0.1 to 5% by weight and 0.005 to 0.3% by weight of ethylenebisamide. (2) The low fluidity polyolefin resin is a crystalline propylene homopolymer, a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less, and a crystalline propylene-ethylene random copolymer having an ethylene content of 5% by weight or less. Polymer, crystalline ethylene-propylene-butene-1 terpolymer having ethylene content of 5% by weight or less and butene-1 content of 10% by weight or less, butene-1 content of 10% by weight
Melt flow rate 0.3 to 2.0 g / 10 selected from the following crystalline propylene-butene-1 copolymer, polyethylene, polybutene-1 and a mixture of two or more thereof.
Which is a polyolefin resin having a high fluidity, including a crystalline propylene homopolymer, a crystalline propylene-ethylene block copolymer having an ethylene content of 5 wt% or less, and a crystalline propylene having an ethylene content of 5 wt% or less. -Ethylene random copolymer, crystalline ethylene-propylene-butene-1 terpolymer having an ethylene content of 5% by weight or less and a butene-1 content of 10% by weight or less, a butene-1 content of 10% by weight. The melt-float selected from the following crystalline propylene-butene-1 copolymer, polyethylene, polybutene-1 and a mixture of two or more kinds thereof is a polyolefin resin of 10 to 50 g / 10 min. The resin composition for washing inside an extruder with a T-die according to item 1. (3) The resin composition for washing in an extruder with a T-die according to the above item 1 or 2, wherein the high fluidity polyolefin resin is a polyethylene having a melt flow rate of 10 to 50 g / 10 min. (4) The melt flow rate of 10 to 50 g / 10 min polyethylene is low density polyethylene or linear low density polyethylene and the melt flow rate is 10 to 50 g / 10 min. ~ The resin composition for washing in an extruder with a T-die according to any one of items 3 to 4. (5) The polyethylene having a melt flow rate of 10 to 50 g / 10 min is low density polyethylene or linear low density polyethylene, and the melt flow rate is 110 ° C. or less.
The resin composition for cleaning in an extruder with a T-die according to any one of the above items 1 to 4, wherein the resin composition is 10 to 50 g / 10 min. (6) The resin composition for cleaning the inside of an extruder with a T-die according to any one of items 1 to 5, wherein the zeolite is a synthetic zeolite having an effective diameter of 1 to 100 µ.

Melt flow rate used in the present invention 0.3-2
Examples of the low fluidity polyolefin resin having g / 10 minutes include a crystalline propylene homopolymer, a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less, and a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less. Ethylene random copolymer, crystalline ethylene-propylene-butene-1 terpolymer having an ethylene content of 5% by weight or less and a butene-1 content of 10% by weight or less, a butene-1 content of 1
0% by weight or less of crystalline propylene-butene-1 copolymer, polyethylene, polybutene-1 or these 2
A mixture of one or more kinds may be mentioned, preferably a melt flow rate is 0.4 to 1.5 g / 10 minutes of a crystalline polypropylene homopolymer, an ethylene content of 5% by weight or less of a crystalline propylene-ethylene block copolymer. A crystalline propylene-ethylene random copolymer having an ethylene content of 5% by weight or less, or a mixture of two or more thereof,
The melt flow rate is 0.3 to 3 g / 10 minutes. The blending ratio of the low-flowing polyolefin resin is 60 to 85% by weight, preferably 65 to 85% by weight, based on the composition.
Is.

Melt flow rate 10 to 50 used in the present invention
Examples of the high fluidity polyolefin resin having g / 10 minutes include polyethylene such as low density polyethylene and linear low density polyethylene, crystalline propylene homopolymer, and crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less. Polymer, crystalline propylene-ethylene random copolymer having an ethylene content of 5% by weight or less, crystalline ethylene-propylene-butene-having an ethylene content of 5% by weight or less and butene-1 content of 10% by weight or less 1 terpolymer,
A crystalline propylene-butene-1 copolymer having a butene-1 content of 10% by weight or less, polybutene-1 or a mixture of two or more thereof, wherein the melt flow rate is 10% or less.
We can list up to 50g / 10min, especially the melting point.
When low-density polyethylene having the melt flow rate of 10 to 50 g / 10 min at 110 ° C. or less and the same linear low-density polyethylene are used, not only the both ends of the die are washed but also adhered to the screw supply part. Colorant master-The batch pellets are sufficiently infiltrated with the calcium salt of borate ester of higher fatty acid monoglyceride in the resin composition for cleaning, and the colorant master-
It is preferable because batch pellets can be easily removed and washed.

When the melt flow rate of the highly fluid polyolefin resin exceeds 50 g / 10 minutes, the cleaning resin composition passing through the T-die becomes too soft and flows only in the center of the die. , It becomes difficult to remove the preceding resin remaining on both ends of the die, and the melt flow
If the rate is less than 10 g / 10 minutes, the removal ability of the colorant master batch adhering to the screw feeding section of the extruder with a T-die becomes small. Specific preferred examples of the high fluidity polyolefin resin having a melting point of 110 ° C. or lower include a melting point of 105 ° C. and a melt flow rate of 22.0 g, which are commercially available from Nippon Petrochemical Co., Ltd. under the trade name of Nisseki Lexron J61. / 10 minutes of low density polyethylene can be mentioned.

The high fluidity polyolefin resin is compounded in an amount of 10 to 30% by weight based on the composition. If the blending amount is less than 10% by weight, the content of the low-flowing polyolefin resin in the cleaning resin composition increases, and as a result, it becomes difficult to clean both ends of the die of the extruder with T-die, and the screw is used. -Colorant master adhering to the supply section-Peeling and removing the batch becomes difficult. On the other hand, if the blending amount exceeds 30% by weight, the resin composition for cleaning that passes through the extruder and the T-die becomes too soft, and it becomes difficult to clean both ends of the die.

In the present invention, the high fluidity polyolefin resin and the low fluidity polyolefin resin use different polyolefins, and a preferred combination is polyethylene as the high fluidity polyolefin resin and low fluidity. Polyolefin resin is a crystalline polypropylene homopolymer, ethylene content of 5 wt% or less crystalline propylene-ethylene block copolymer, ethylene content of 5 wt% or less crystalline propylene-ethylene random copolymer or these A mixture of two or more kinds having a melt flow rate of 0.4 to 1.5 g / 10 minutes. In particular, when low-density polyethylene or linear low-density polyethylene having a melting point of 110 ° C. or less and a melt flow rate of 20 to 50 g / 10 min is used as the highly fluid polyolefin resin, it adheres to the screw feeding section of the extruder. A resin composition for cleaning which can easily remove and clean the preceding colorant master-batch pellets is obtained.

The calcium salt of a boric acid ester of higher fatty acid monoglyceride used in the present invention is a calcium salt of a boric acid ester obtained from a higher fatty acid monoglyceride having an alkyl group having 11 to 17 carbon atoms as a raw material. 0.5-10% by weight, preferably 1.0
~ 7.5% by weight. When the content is less than 0.5% by weight, the effect of cleaning the preceding resin existing in the extruder is small, and when it exceeds 10% by weight, the melt fluidity of the cleaning resin composition becomes high, and the cleaning resin composition Since the material concentrates on the central portion of the T-die, it is difficult to remove the preceding resin existing at both ends of the die.

The calcium salt of the boric acid ester of higher fatty acid monoglyceride comprises higher fatty acid monoglyceride and boric acid, for example, in a molar ratio of 1: 0.2 to 1, and a reaction temperature of 95 to 20.
It can be obtained by reacting at 0 ° C. and then neutralizing the obtained reaction product with calcium hydroxide. Examples of the higher fatty acid monoglyceride include stearic acid monoglyceride, lauric acid monoglyceride, behenic acid monoglyceride, and the like, and as the boric acid, usually commercially available boric acid, boric anhydride, etc. may be used. A specific example thereof is a boric acid ester calcium salt of higher fatty acid monoglyceride, which is commercially available from Daiichi Kogyo Seiyaku Co., Ltd. under the trade name of “GX-8076”.

The zeolite used in the present invention is a so-called aluminum hydrous silicate mineral, that is, crystalline alumina, hydrous alkali metal salt or alkaline earth metal salt of silicate, and natural zeolite such as Na, K, Ca and synthetic zeolite as metal. The effective diameter is 1μ ~ 100
μ is preferable. If the effective diameter is less than 1 μm, the substances that can be adsorbed are limited, and the detergency of the resulting cleaning resin composition is weakened. On the other hand, when it exceeds 100 μm, the zeolite may stay in the extruder, which may deteriorate the appearance of the subsequent molded product and impair the quality of the resulting molded product.

The content of the zeolite is preferably 0.1 to 5.0% by weight with respect to the composition obtained. A content of less than 0.5% by weight has no cleaning effect, and a content of more than 5.0% by weight results in a cleaning resin. The composition becomes more lubricious and the cleaning effect is reduced. A specific example of the zeolite used is "Molecular Sieve 13X" under the trade name Union Showa Co., Ltd.
The more commercially available zeolite can be mentioned.

Examples of the ethylene bisamide used in the present invention include ethylene bisstearic acid amide and ethylene bispalmitic acid amide. The blending amount of ethylenebisamide is 0.005 to 0.3% by weight. If the blending amount is less than 0.005% by weight, the resulting cleaning resin composition easily sticks to the screw, and after being used for cleaning, it is difficult to be replaced by the subsequent cleaning resin, so that the amount of the cleaning resin used is large. It is not preferable. Also, 0.3
If the blending amount is more than wt%, the resulting cleaning resin composition will be too slippery and the cleaning effect will be reduced, such being undesirable.

If necessary, metallic soaps such as calcium stearate, magnesium stearate and zinc stearate, and waxes such as carnauba wax and polyethylene wax may be added to the cleaning resin composition of the present invention. it can.

In the cleaning resin composition of the present invention, predetermined amounts of low fluidity polyolefin, high fluidity polyolefin, boric acid ester calcium salt of higher fatty acid monoglyceride, zeolite and ethylene bisamide are mixed by using a stirrer. Alternatively, it can be obtained in the form of pellets by melt-kneading and extruding at a melting temperature of 170 to 300 ° C. As a stirring and mixing device, a Henschel mixer
(Trade name), super mixer, tumbler mixer,
A stirring and mixing device such as a riboblender may be used. As the extruder, a single-screw extruder, a twin-screw extruder, a kneader or the like can be used. Pelletization may be performed by cutting the extruded strand underwater, in the mist or in the air. The cleaning resin composition of the present invention is preferably in the form of pellets.

The cleaning resin composition of the present invention can be used in an injection molding machine, an extrusion molding machine, and a blow molding machine, but it is particularly effective in cleaning an extruder with a T-die. The extruder with a T-die may be either a single-screw extruder or a twin-screw extruder, and the screw is a full-flight screw and an extruder equipped with a screw having a shape intended for strong kneading (for example, a dullage screw). I can raise the opportunity. The T-die to be mounted may be a general T-shaped straight manifold type, a coat hanger type, a fishtail type T-die for forming a flat film or a sheet. .

The washing temperature is usually 200 to 250 ° C., and the washing can be performed with the screen pack at the same rotation speed and discharge amount as in the case of molding using a normal polyolefin resin. The washing with the washing resin used after washing can be carried out under the same conditions as the washing with the washing resin composition. Prior resins to be washed are polyolefins colored with organic or inorganic pigments and filler-containing polyolefins.

The melt flow rate referred to in the present invention is JIS K7210 (flow test method for thermoplastics).
The melt flow rate of the resin measured by the corresponding resin test conditions described in 1.

[0021]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited thereto.

Example 1 As a low fluidity polyolefin resin, propylene homopolymer 8 having a melt flow rate (JIS K6758: 230 ° C.) of 0.5 g / 10 min.
1.0 kg (81% by weight), as a highly fluid polyolefin resin, melting point 105 ° C, melt flow rate (JIS K6760: 190
℃) 22.0g / 10min Low density ethylene homopolymer 10.80Kg (1
0.8 wt%), calcium salt of boric acid ester made from higher fatty acid monoglyceride [GX-8076, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.] 5.00 Kg (5 wt%), zeolite with average particle size of 10 μm or less [13X, Union Showa Co., Ltd.] 3.15Kg
(3.15% by weight), ethylene bis-stearic acid amide 0.
05Kg (0.05wt%) was put into a 300l high speed mixer and stirred for 2 minutes, and then the resulting mixture was screw diameter 50mmφ.
Into a twin-screw extruder and extruded at a cylinder temperature of 220 [deg.] C., and the strand was subjected to a pelletizer to obtain a milky white granular resin composition for washing. Using the cleaning composition, a cleaning test was performed using an extruder with a T-die. The extruder with a T-die used in the test was a single-screw extruder with a cylinder diameter of 65 mmφ and an L / D of 28, and a T-die with a width of 500 mm attached. The extrusion temperature was set to 220 ° C for the cylinder part and 250 ° C for the die part.
Phthalocyanine blue-colorant master-batch (brand name: ECE0507 manufactured by Toyo Ink) as a preceding resin, mixed with 2% polypropylene (JIS K6758: 230 ° C) 2.0g / 10min. The sheet was formed into a film. After flowing the colored polypropylene, 15 kg of the cleaning resin composition was put into the hopper of the extruder and extruded to wash the preceding resin, the colored polypropylene. After starting cleaning 10
The blue color at both ends of the sheet extruded from the die in minutes disappeared. After the washing resin composition had been poured, the interior of the machine was washed with a polypropylene resin of natural color (melt flow rate 2.0 g / 10 minutes) as the washing resin. The washing polypropylene consumed until the washing resin composition was removed was 12 kg. Further, the time from the start of pouring the cleaning resin composition to the end of pouring the cleaning polypropylene was 17 minutes. After the completion of washing, the extruder was stopped and the screw was taken out. No stain of the colored resin, which is the preceding resin, was observed in both the feeding section and the kneading section of the screw. The test results are shown in Table 1.

Examples 2 to 4 The blending components shown in Table 1 were mixed by stirring according to Example 1 using the blending amounts shown in Table 1 and granulated with an extruder (in the table, crystalline polypropylene is crystalline. Crystalline propylene homopolymer, and the crystalline PE block represents a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight). A cleaning test was carried out in accordance with Example 1 using the obtained cleaning resin composition. Both ends of the die are bull-
The color disappeared, and the screw was not stained with the colored resin as the preceding resin over the entire surface. The results are shown in Table 1.

Comparative Example 1 A resin composition for mixing with stirring and extruding was obtained in the same manner as in Example 1 except that the blending components shown in Table 1 were blended in amounts shown in Table 1.
A cleaning test was performed according to Example 1 using the obtained resin composition for cleaning. 50 Kg of the washing resin polypropylene was consumed until the blue color on both ends of the die almost disappeared, and the washing time was 40 minutes. In addition, a slight bluish color remained at both ends of the obtained film, and a slight bluish color remained in the screw supply part.

Comparative Example 2 A washing resin composition was obtained by stirring, mixing and extruding in accordance with Example 1 except that low density polyethylene having a melting point of 118 ° C. and a melt flow rate of 3.0 g / 10 min was used. . A cleaning test was performed according to Example 1 using the obtained cleaning resin composition. Consume 75 kg of polypropylene for cleaning, 55
After washing for minutes, the extruder intermittently discharged a blue color.

Comparative Example 3 According to Example 1 except that polyethylene was not used,
A cleaning resin composition was obtained. A cleaning test was performed according to Example 1 using the obtained resin composition for cleaning. The blue color was removed from both ends of the die, but the blue color remained in the screw supply section.

Comparative Example 4 56.0 kg of a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight and 35.8 of a low-density polyethylene were used.
Except that Kg was used, the mixture was stirred and mixed according to Example 1 and extruded with an extruder to obtain a resin composition for washing. A cleaning test was performed in accordance with Example 1 using the obtained resin composition for cleaning. The blu-color on both ends of the die could not be removed despite flushing with wash polypropylene for 60 minutes.

[0028]

When the inside of the extruder with a T-die is cleaned with the cleaning resin composition of the present invention, both ends of the T-die can be easily cleaned by using a small amount of the cleaning resin in a short time. In addition, when low-density polyethylene having a melting point of 110 ° C. or less or linear low-density polyethylene is used as the high-fluidity polyolefin resin, not only the both ends of the T-die can be washed but also the colorant masterbatch attached to the screw supply section. Pellets can be easily removed by using a small amount of cleaning resin in a short time. That is, as shown in the examples, the amount of the cleaning resin used can be 1/2 or less, and the cleaning time can also be 1/2 or less, as compared with the case of using the conventional cleaning resin composition. It exerts a remarkable cleaning effect on the inside of the attached extruder.

[0029]

[Table 1]

Claims (6)

[Claims] 1. A low fluidity polyolefin resin having a melt flow rate of 0.3 to 2 g / 10 minutes, 60 to 85% by weight, and a polyolefin resin different from the low fluidity polyolefin resin. Is 10 to 50 g / 10 min, which is a high fluidity polyolefin resin 10 to 30% by weight, boric acid ester calcium salt of higher fatty acid monoglyceride 0.5 to 10% by weight, zeolite 0.1 to 5% by weight and ethylene bisamide 0.00.
A resin composition for cleaning the inside of an extruder with a T-die, which comprises 5 to 0.3% by weight. 2. A low fluidity polyolefin resin comprising a crystalline propylene homopolymer, a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less, and a crystalline propylene-ethylene having an ethylene content of 5% by weight or less. Random copolymer, crystalline ethylene-propylene-butene-1 terpolymer having an ethylene content of 5% by weight or less and a butene-1 content of 10% by weight or less, a butene-1 content of 1
Melt flow rate selected from 0% by weight or less of crystalline propylene-butene-1 copolymer, polyethylene, polybutene-1 and a mixture of two or more thereof.
It is a polyolefin resin of 3 to 2.0 g / 10 minutes, and the high fluidity polyolefin resin is a crystalline propylene homopolymer, a crystalline propylene-ethylene block copolymer having an ethylene content of 5% by weight or less, an ethylene content of 5% by weight. % Or less of a crystalline propylene-ethylene random copolymer, an ethylene content of 5% by weight or less and a butene-1 content of 10% by weight or less of a crystalline ethylene-propylene-butene-1 terpolymer, butene-1. Melt flow rate selected from a crystalline propylene-butene-1 copolymer having a content of 10% by weight or less, polyethylene, polybutene-1 and a mixture of two or more thereof, 10 to 50 g / 10 min. The resin composition for cleaning the inside of an extruder with a T-die according to claim 1, which is a polyolefin resin. 3. The resin composition for cleaning the inside of an extruder with a T-die according to claim 1 or 2, wherein the high fluidity polyolefin resin is a polyethylene having a melt flow rate of 10 to 50 g / 10 min. 4. The melt flow rate polyethylene of 10 to 50 g / 10 minutes is low density polyethylene or linear low density polyethylene, and the melt flow rate is 10 to 50 g / 10 minutes. The resin composition for cleaning the inside of an extruder with a T-die according to any one of claims 1 to 3. 5. A polyethylene having a melt flow rate of 10 to 50 g / 10 min is a low density polyethylene or a linear low density polyethylene having a melting point of 110 ° C. or less and a melt flow rate of 10 to 50 g / The resin composition for washing in an extruder with a T-die according to any one of claims 1 to 4, which is for 10 minutes. 6. The resin composition for cleaning the inside of an extruder with a T-die according to any one of claims 1 to 5, wherein the zeolite is a synthetic zeolite having an effective diameter of 1 µ to 100 µ.