JPH04332748A - Vinyl chloride-based resin composition and plugging part using the same - Google Patents

Abstract

PURPOSE:To provide a low toxic composition good in thermal stability, low in initial discoloration and excellent in molding processability and to provide plugging parts for suitable use in the inlet and outlet of flexible medical containers from the composition. CONSTITUTION:The objective composition can be obtained by incorporating 100 pts.wt. of polyvinyl chloride with (A) 0.01-3 pts.wt. of a zinc salt of organic monocarboxylic acid (e.g. zinc caproate), (B) 0.1-2 pts.wt. of a beta-diketone of the formula (R<1> is methyl, phenyl, etc.; R<2> is methyl, ethyl, etc.) (e.g. acetylacetone), (C) 0.1-20 pts.wt. of a copolymer having at least glycidyl (meth) acrylate unit (e.g. glycidyl methacrylate-methyl methacrylate copolymer), (D) 0.0-5 pts.wt. of a phosphite-based antioxidant (e.g. tributyl phosphite), and (E) 0.01-5 pts.wt. of a hindered phenol-based antioxidant. The other objective plugging parts given in the figure can be obtained from the composition.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin composition that has excellent thermal stability and is non-toxic or low-toxic, and a closure component using the same.

0002

BACKGROUND OF THE INVENTION Vinyl chloride resins are widely used in packaging materials, containers, etc. with advances in molding technology.

[0003] This vinyl chloride resin lacks stability against heat and light, so metal soap is added to improve moldability. However, vinyl chloride resin compositions using cadmium soap or lead soap as metal soaps are toxic and cannot be used for packaging materials or containers that come into direct contact with food or for medical purposes.

[0004] Therefore, vinyl chloride resin is used for food packaging materials, food containers, medical packaging materials, equipment, etc., for example, by attaching it to the entrance and exit of flexible containers to block the liquid content, and to close the closed part. When used in closed parts that can be easily broken to open the entrance/exit by bending, metal soaps other than cadmium soap or lead soap, such as calcium soap, zinc soap, magnesium soap, barium soap, etc., should be replaced with vinyl chloride soap. It was used by adding it to the resin.

[0005]

[Problems to be Solved by the Invention] By the way, the above-mentioned metal soaps other than cadmium soap and lead soap all have a considerably smaller thermal stability effect on vinyl chloride resins than cadmium soap and lead soap. Therefore, non-metallic stabilizers such as polyhydric alcohol, trisnonylphenyl phosphate, aminocrotonic acid ester, diphenylthiourea, pentaerythol adipate, and pentaerythol are used in combination with these metal soaps. However, even such vinyl chloride resin compositions do not have much higher thermal stability than vinyl chloride resin compositions containing cadmium soap or lead soap.

[0006] Therefore, the above-mentioned metal soaps other than cadmium soap and lead soap are used in combination with epoxidized soybean oil. When used as a resin, the softening point is lowered. Furthermore, a combination of calcium soap or barium soap with zinc soap not only has insufficient thermal stability, but also tends to cause initial discoloration. In addition, a dioctyltin stabilizer is sometimes used, but in this case, a long period of work is required for the molding process.

As described above, vinyl chloride resin compositions using non-toxic or low-toxic heat stabilizers other than cadmium soap or lead soap do not necessarily have sufficient thermal stability, and the vinyl chloride resin is It easily deteriorates due to heat, and tends to cause discoloration and quality of molded products due to heat deterioration. In addition, these vinyl chloride resin compositions were not designed with special consideration given to the bending breakability of the above-mentioned closing parts, so when bending and breaking, it is difficult to completely break the broken part by just bending it in one direction. First, it had the disadvantage that it had to be bent further in the opposite direction, and that it would not break unless a considerable amount of force was applied with both hands.

[0008] In view of these points, the present invention provides packaging materials, especially medical packaging materials, equipment, food packaging materials, etc., which are non-toxic or low-toxic, have excellent thermal stability, have no initial coloring, and are easily molded. The purpose of the present invention is to provide a vinyl chloride resin composition suitable for uses such as food containers.

[0009] It is also an object of the present invention to particularly provide the above-mentioned closure component with good bending and breakability.

0010

[Means for Solving the Problems] The vinyl chloride resin composition of the present invention contains the following substances (
It is characterized by containing a) to (e). (a) Zinc salt of organic monocarboxylic acid (b) β-diketone represented by the following formula (1)
R1 -COCH2 CO-R2 ──────────
--(1) (Here, R1 represents a methyl group, phenyl group, or trifluoromethyl group, and R2 represents a methyl group, ethyl group, phenyl group, or heptadecyl group.) (c) At least glycidyl (meth)acrylate (d) Phosphite-based antioxidant (e) Hindered phenol-based antioxidant A broken part formed by carving a groove is provided on the outer periphery of the closed cylindrical body with one end closed, and the one end side that is closed across this broken part is the closed part and the unclosed part. The other end side is a fixed part, and by fixing this fixed part to the entrance/exit of a flexible container, the closing cylindrical body is arranged so as to close the inside of the conduit communicating with this entrance, and the closing cylindrical body is installed from the outside of the conduit. By bending the shaped body, the broken portion is broken and the entrance/exit is opened.

[0011] The vinyl chloride resin used in the present invention includes a homopolymer of vinyl chloride, a copolymer containing vinyl chloride as a main component and one or more other monomers copolymerizable therewith. , refers to post-chlorinated polyvinyl chloride. This vinyl chloride resin can be obtained by a conventional suspension polymerization method, emulsion polymerization method, or the like. Note that a vinyl chloride homopolymer and a vinyl chloride copolymer may be mixed and used.

Monomers copolymerizable with the vinyl chloride include α-olefins such as ethylene and propylene;
Vinyl esters such as vinyl acetate, unsaturated carboxylic acid esters such as (meth)acrylic acid alkyl esters, vinyl ethers such as alkyl vinyl ethers, vinyl halides such as vinyl bromide and vinyl fluoride, other styrene, acrylonitrile, Vinyl monomers other than those mentioned above, such as vinylidene chloride, or vinylidene monomers may be mentioned.

Among the above-mentioned vinyl chloride resins, polyvinyl chloride with an average degree of polymerization of 800 to 1700, or polyvinyl chloride with an ethylene content of 2 to 8% by weight and an average degree of polymerization of 800 to 1,700, is particularly preferred.
2000 vinyl chloride-ethylene copolymer is preferably used. Further, this polyvinyl chloride and vinyl chloride-ethylene copolymer may be mixed and used in any ratio.

Examples of the organic monocarboxylic acid zinc salt (a) include zinc caproate, zinc pelargonate, zinc laurate, zinc 2-ethylhexylate, zinc myristate, zinc palmitate, zinc oleate, zinc stearate,
Examples include zinc 1,2-dihydroxystearate, zinc behenate, and zinc erucate. The organic monocarboxylic acid zinc salt (a) is preferably 0.01 to 3 parts by weight, more preferably 0.0 parts by weight, based on 100 parts by weight of the vinyl chloride resin.
It is desirable that the content be in the range of 2 to 1 part by weight. 0.0
If it is less than 1 part by weight, the desired thermal stability cannot be obtained, and if it exceeds 3 parts by weight, not only will the thermal stability not improve significantly, but it will have an unfavorable effect on the physical properties of the vinyl chloride resin composition.

Examples of the β-diketone (b) include acetylacetone, benzoylacetone, benzoylpropionylmethane, dibenzoylmethane, stearoylbenzoylmethane, and trifluoroacetylacetone. This β-diketone (b) is desirably blended in an amount of 0.1 to 2 parts by weight, more preferably 0.3 to 2 parts by weight, per 100 parts by weight of the vinyl chloride resin. If it is less than 0.1 parts by weight, the desired thermal stability will not be obtained and the initial coloring will be high, and if it exceeds 2 parts by weight,
Not only does the thermal stability not improve much, but it also has an undesirable effect on the physical properties of the vinyl chloride resin composition.

The copolymer (c) having at least glycidyl (meth)acrylate units may include glycidyl (meth)acrylate units.
Other monomers copolymerizable with meth)acrylate, such as ethyl acrylate, butyl acrylate, propyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, stearyl acrylate, behenyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl Examples include copolymers with one or more of methacrylate, n-octyl methacrylate, 2-ethylhexyl acrylate, lauryl methacrylate, cetyl methacrylate, stearyl methacrylate, behenyl methacrylate, styrene, acrylonitrile, and the like. This copolymer preferably contains glycidyl (meth)acrylate units in an amount of 5 to 90% by weight, preferably 30 to 60% by weight. If it is less than 5% by weight, the desired thermal stability cannot be obtained, and if it exceeds 90% by weight, the moldability of the resulting vinyl chloride resin composition will decrease.

Examples of such copolymers include glycidyl methacrylate-methyl methacrylate copolymer, glycidyl methacrylate-methyl methacrylate-ethyl methacrylate copolymer, and glycidyl methacrylate-styrene-acrylonitrile copolymer. can be given.

This copolymer has a weight average molecular weight of 5
000 to 50,000, and the glass transition point is 60 to 1
Preferably, the temperature is 20°C. This copolymer is 0.1 to 20 parts by weight per 100 parts by weight of vinyl chloride resin,
It is desirable that the amount is preferably 0.5 to 10 parts by weight. If it is less than 0.1 part by weight, the desired thermal stability cannot be obtained, and if it exceeds 20 parts by weight, the resulting vinyl chloride resin composition will have increased stickiness and poor moldability.

Examples of the phosphite antioxidant (d) include trialkyl phosphites such as tributyl phosphite and triiso-octyl phosphite, and mono-iso-octyl phosphites.
- alkylaryl phosphites such as octyldiphenyl phosphite, monoiso-decyl diphenyl phosphite, triarylphosphites such as triphenyl phosphite, tris(P-nonylphenyl) phosphite, tetraphenyldipropylene diphosphite,
Examples include oligophosphites such as distearyl pentaerythritol diphosphite. in particular,
Mark 329K (trade name: manufactured by Adeka Argus) is particularly suitable for medical use. The amount of this phosphite-based antioxidant is 0.0% per 100 parts by weight of the vinyl chloride-based resin.
It is desirable that the amount is in the range of 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight. If it is less than 0.01 parts by weight, desired thermal stability cannot be obtained, and if it exceeds 5 parts by weight, it tends to bleed.

[0020] Hindered phenolic antioxidant (e)
Specifically, Irganox 1010 (trade name: manufactured by Ciba Geigy) is particularly preferably employed, and the blending amount is 0.01 parts by weight per 100 parts by weight of vinyl chloride resin.
-5 parts by weight, preferably 0.1-3 parts by weight. If it is less than 0.01 parts by weight, desired thermal stability cannot be obtained, and if it exceeds 5 parts by weight, it tends to bleed.

[0021] The vinyl chloride resin composition of the present invention includes:
Phthalate ester plasticizers, phosphate ester plasticizers, other low-molecular ester plasticizers, epoxidized soybean oil, antioxidants other than those listed above, ultraviolet absorbers, within the range that does not have an unfavorable effect on the physical properties. Additives such as pigments, fillers, lubricants, processing aids, reinforcing agents, etc. may be added. In particular, it is preferable for molding processing that epoxidized soybean oil be added within a range that does not significantly lower the softening point of the vinyl chloride resin.

[0022] The closing component is arranged such that its fixed portion is fixed to the entrance/exit of the flexible container so that the closing cylindrical body closes the conduit communicating with the entrance/exit. Then, force is applied manually from the outside of the conduit to bend the blocking component, thereby breaking the broken portion of the blocking tubular body. As a result, the inlet/outlet of the container becomes open, allowing the fluid in the container to flow out. By the way, regarding the shape and dimensions of the groove of the broken part provided on the outer periphery of the closed cylindrical body in the closed part made from the vinyl chloride resin composition of the present invention, the bottom width of the groove is set to 0 to 1. .5 mm, the minimum wall thickness of the closed cylindrical body in the groove of the broken part is 0.35 to 0.6 mm, and the side surface on the fixed part side of both sides of the groove of the broken part has an inclination angle of 25 to 9.
It is preferable that the angle of inclination is 0°, and the side surface on the fixed part side has an inclination angle of 45 to 90°. Note that the inner diameter of the closed cylindrical body at the fractured portion is generally 5 mm or less. By configuring the shape and dimensions of the groove in the breakage portion as described above, the closure component made of the vinyl chloride resin composition can be operated with one hand and exhibits better bending and breakability.

[0023]

EXAMPLES Next, the present invention will be further explained with reference to examples. Hereinafter, parts by weight are referred to as parts.

Example 1 For 100 parts of polyvinyl chloride (average degree of polymerization 800),
A composition obtained by blending the following additives was kneaded at 170 DEG C. for 4 minutes using two 8-inch diameter rolls to form a sheet with a thickness of 1 mm.

Zinc stearate

0.5 part stearoylbenzoylmethane

1 part glycidyl methacrylate-methyl methacrylate copolymer 3 parts (
Glycidyl methacrylate content: 46% by weight, methyl methacrylate content: 53% by weight, weight average molecular weight: 10,000, glass transition temperature: 74°C)
Oxidized polyethylene wax
0.5 part
(Hiwax 4202E, manufactured by Mitsui Petrochemical Industries, Ltd.)
Epoxidized soybean oil

12 parts Processing aid (Kane Ace PA-100, manufactured by Kanebuchi Kagaku Kogyo Co., Ltd.) 0.5 part Phosphite-based antioxidant
0.5 part (Mark 329K, manufactured by Adeka Argus) Hindered phenolic antioxidant
1 part (Irganox 1010, manufactured by Ciba Geigy) The obtained sheet was cut into 3 cm square pieces, and the thermal stability was evaluated by measuring the time until the sheet turned black at 180°C. In addition, after leaving a 3 cm square sheet at 180°C for 30 minutes, a color difference meter (Z
-1001DP, manufactured by Nippon Denshoku Kogyo Co., Ltd.), and
Initial colorability was evaluated by measuring yellow Index). The results are shown in Table 1.

Example 2 For 100 parts of polyvinyl chloride (average degree of polymerization 800),
A sheet was prepared in the same manner as in the example except that the following additives were added.

Zinc stearate

0.02 parts stearoylbenzoylmethane

0.5 parts Glycidyl methacrylate-methyl methacrylate copolymer 1 part (Glycidyl methacrylate content 46% by weight, methyl methacrylate content 53% by weight, weight average molecular weight 10000, glass transition temperature 74°C) Oxidized polyethylene wax
Part 1
(Hiwax 4202E, manufactured by Mitsui Petrochemical Industries, Ltd.)
Epoxidized soybean oil
1
0 parts Stearic acid (F-3, manufactured by Kawaken Fine Chemicals) 0.3 parts Processing aid (Kane Ace PA-100, manufactured by Kanebuchi Chemical Industries)
1 part phosphite antioxidant

0.5 part (Irganox 1010
(manufactured by Ciba Geigy) Hindered phenolic antioxidant
1 part (Mark 329K, manufactured by Adeka Argus) The obtained sheet was subjected to the same quality evaluation as in Example 1. The results are shown in Table 1.

Example 3 The same procedure as in Example 1 was carried out, except that the amount of zinc stearate was 0.04 parts and the amount of glycidyl methacrylate-methyl methacrylate copolymer was 2 parts. The results are shown in Table 1.

Example 4 Zinc stearate was used as 0.04 part, and methyl methacrylate-glycidyl methacrylate-styrene-ethyl acrylate copolymer (methyl methacrylate component) was used instead of glycidyl methacrylate-methyl methacrylate copolymer. Content: 53% by weight, glycidyl methacrylate component content: 27% by weight, styrene component content: 10% by weight, ethyl acrylate component content: 10% by weight, weight average molecular weight: 9000, glass transition temperature: 69°C)
The procedure was the same as in Example 1 except that 1 part of was used. The results are shown in Table 1.

Comparative Example 1 The same procedure as Example 1 was carried out except that zinc stearate was used at 0.02 part and stearoylbenzoylmethane and hindered phenol antioxidant were not used. The results are shown in Table 1.

Comparative Example 2 Zinc stearate was used as 0.02 parts, a hindered phenolic antioxidant and a glycidyl methacrylate-methyl methacrylate copolymer were not used, and 1,4- The same procedure as in Example 1 was carried out except that 0.5 part of butanediol (β-aminocrotonate) was used. The results are shown in Table 1.

Comparative Example 3 Zinc stearate was 0.02 parts, stearoylbenzoylmethane was 0.5 parts, and the hindered phenol antioxidant and glycidyl methacrylate-methyl methacrylate copolymer were not used. , in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 4 Zinc stearate was used at 0.02 parts, no hindered phenolic antioxidant and glycidyl methacrylate-methyl methacrylate copolymer were used, and 0.02 parts of diphenylthiourea was used instead of stearoylbenzoylmethane.
．． The same procedure as Example 1 was carried out except that 5 parts were used. The results are shown in Table 1.

Comparative Example 5 Zinc stearate was used as 0.02 part, phosphite antioxidant and glycidyl methacrylate-methyl methacrylate copolymer were not used, and dipentaerythritol adipine was used in place of stearoylbenzoylmethane. The same procedure as in Example 1 was carried out except that 0.5 part of the acid ester was used. The results are shown in Table 1.

Comparative Example 6 Zinc stearate was used as 0.02 parts, phosphite antioxidant and glycidyl methacrylate-methyl methacrylate copolymer were not used, and stearoyl benzoylmethane was replaced with 0.0 parts of pentaerythol. The same procedure as Example 1 was carried out except that 5 parts were used. The results are shown in Table 1.

Comparative Example 7 The procedure was carried out except that zinc stearate was 0.02 parts, glycidyl methacrylate-methyl methacrylate copolymer was 0.5 parts, and phosphite antioxidant and stearoylbenzoylmethane were not used. The same procedure as Example 1 was carried out. The results are shown in Table 1.

Comparative Example 8 Calcium stearate was used in place of zinc stearate.
The procedure was the same as in Example 1, except that 0.04 parts of stearoylbenzoylmethane, 0.5 parts of glycidyl methacrylate-methyl methacrylate copolymer, and 1 part of glycidyl methacrylate-methyl methacrylate copolymer were used. The results are shown in Table 1.

Comparative Example 9 Barium stearate 0.0 in place of zinc stearate
Using 4 parts, 0.5 parts of stearoylbenzoylmethane,
The same procedure as in Example 1 was carried out except that 1 part of the glycidyl methacrylate-methyl methacrylate copolymer was used. The results are shown in Table 1.

[0039]

[Table 1]

As is clear from the results, the vinyl chloride resin composition of the present invention has excellent thermal stability and low initial coloration. Vinyl chloride resin compositions not according to the present invention have insufficient thermal stability. Moreover, the vinyl chloride resin composition of the present invention has low toxicity, as is clear from the additives used.

Next, the closure component of the present invention will be explained with reference to the drawings. FIG. 1 shows the overall structure of this closure component, where 1 is the closure component, and 2 and 3 are conduits.

The closing component 1 is composed of a closing cylindrical body 10 made of a cylinder with one end closed, and a locking portion 14 formed on the outer periphery of the opening side edge of the closing cylindrical body 10. A broken portion 11 is formed on the outer periphery of the closed cylindrical body 10 by cutting a groove 16 along the circumferential direction approximately in the center thereof. One side of the broken part 11 is a closing part 12, and the other part is a fixed part 13.

The closing portion 12 has a cylindrical shape with a diameter smaller than that of the fixing portion 13, so that the closing portion 12 after rupture can be easily separated from the fixing portion 13 and moved within the conduit 2. Moreover, it is formed so as to become tapered toward the end. This facilitates insertion of the closure component 1 into the conduit 2. Regarding the closed state of the closed portion 12, the entire interior may be in a cylindrical state and only the end side may be closed, or as in this embodiment, almost the entire interior may be closed to prevent the interior from becoming too cylindrical. It's okay. However, the inside of the broken part 11 must be cylindrical and hollow.

The fixing portion 13 has a cylindrical shape with a diameter approximately equal to or slightly larger than the inner diameter of the conduit 2 so that the closure component 1 can be inserted into the conduit 2. Further, a flange-shaped locking portion 14 is formed along the circumferential direction on the outer periphery of the end portion of the fixing portion 13 so as to prevent the fixing portion 13 from entering the conduit 2 in this inserted state.

Furthermore, a fitting groove 15 is formed along the circumferential direction in a thick portion of the fixing portion 13 extending from the inner circumference to the outer circumference. A conduit 3 having a smaller diameter than the conduit 2 can be fitted and fixed into the fitting groove 15 . Note that this conduit 3 is a guide tube for draining the content liquid. Further, in order to stabilize the fitted state of the conduit 3, a portion inside the fitting groove 15 is further protruded to form an insertion portion 19 that can be fully inserted into the conduit 3. .

As shown in an enlarged view in FIG. 2, the groove 16 of the broken part 11 has an inclined surface 17 formed on the closing part 12 side, an inclined surface 18 formed on the fixed part 13 side, and a bottom part (no bottom part). (in some cases), it is almost wedge-shaped. As for the minimum thickness t of the groove 16 portion of the cylindrical body 10, a thinner one is preferable for breakage, but if it is formed too thin, there is a risk of accidental breakage when not in use. It becomes difficult to do so. On the other hand, if it becomes thick, it will not be easy to break it with one hand. Therefore, this groove 16
The thickness t of the portion is preferably in the range of 0.35 to 0.6 mm. Further, the inner width l of the groove 16 is 0 to 1.
．． Preferably, the range is 5 mm. This is because molding becomes difficult if the width exceeds 1.5 mm.

The inclination angle β of the side surface 17 on the side of the closed portion 12 is 4.
The angle of inclination α of the side surface 18 on the fixed portion 13 side is preferably in the range of 25 to 90°. As shown in the figure, it is preferable that the inclination angle α of the side surface 18 on the fixed part 13 side is smaller than the inclination angle β of the side surface 17 on the obstructing part 12 side because bending and breakage properties are excellent.

Further, it is preferable that the inner diameter d of the closed cylindrical body 10 at the groove 16 portion does not normally exceed 5 mm. If it exceeds 5 mm, it may be difficult to bend it with one hand. As a material for such a closure component 1, the above-mentioned vinyl chloride resin composition is used.

[0049] Such a closure component 1 can be used, for example, as a container for an infusion solution, a glycerin enema solution, or the like. Since it is made using the materials mentioned above, when it is blocked,
The contents of these containers can be stored in a sterile state.

Next, an example of an experiment conducted to clarify the practicality of the closure component of the present invention will be described. Using the vinyl chloride resin compositions of Examples 1 to 4 and Comparative Examples 1 to 9 as materials, closed parts having the shapes shown in the figures were molded by injection molding.

[0051] The groove shape and dimensions of the broken part of this closing part are as follows:
It was as follows. Thickness t of tubular body in groove: 0.35m
m, groove bottom width l: 0.7 mm, inclination angle of fixed part side side surface: 31.8°, inclination angle of closed part side side surface: 58.2°,
Inner diameter d of the cylindrical body of the groove: 3.8 mm.

The thus obtained closure component was inserted into a flexible polyvinyl chloride resin tube 2 having an inner diameter of 10 mm and an outer diameter of 12 mm, as shown in FIG. 3, and was bent to perform a bending strength test.

In this bending strength test, the closing part 1 was placed on two supporting points 4, 4 with an interval of 20 mm, and the tip 5 (3 mm) of a hardness meter manufactured by Kiya Seisakusho Co., Ltd. (minimum scale: 0.2 kg, maximum scale: 20 kg) was used. A load was applied to the closed part near the broken part, and the load when the broken part 11 broke and broke was measured. Note that the measurements were performed at room temperature.

[0054] The results are shown in Table 1 above, and all were good, breaking under a load of 10 kg or less.

[0055]

As described above, the vinyl chloride resin composition of the present invention has low toxicity, excellent thermal stability, low initial coloring, and good moldability.

[0056] The closure part made of this vinyl chloride resin composition is attached to the entrance/exit of a flexible medical container, and not only safely seals the liquid inside, but also easily breaks with one hand when in use. This makes it possible to easily separate the broken part.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing the overall configuration of a closure component of the present invention.

FIG. 2 is an enlarged view of a broken portion in FIG. 1;

FIG. 3 is a partially cutaway side view showing a method for measuring the bending strength of a closure component in an experimental example.

[Explanation of symbols]

1 Blocking parts 10 Closed cylindrical body 11 Broken part 14 Locking part 16 groove 17, 18 Side of groove 2, 3 Conduit

Claims (2)

[Claims] Claim 1: A zinc salt of an organic monocarboxylic acid (a) and β represented by the following formula (1) for a vinyl chloride resin.
-diketone (b) and R1 -COCH2 CO-R2 ───
──────── (1) (Here, R1 is a methyl group,
Represents a phenyl group or trifluoromethyl group, R2
represents a methyl group, ethyl group, phenyl group or heptadecyl group. ) A vinyl chloride characterized by containing a copolymer (c) having at least a glycidyl (meth)acrylate unit, a phosphite antioxidant (d), and a hindered phenol antioxidant (e) based resin composition. Claim 2: A broken part formed by carving a groove is provided on the outer periphery of the closed cylindrical body with one end closed, and the one end side that is closed across the broken part is the closed part. The other end that is not connected is a fixed part, and by fixing this fixed part to the entrance/exit of the flexible container, the closing cylindrical body is arranged so as to close the inside of the conduit communicating with this entrance/exit, and the outside of this conduit is The part is made of the vinyl chloride resin composition according to claim 1, and the part is made of the vinyl chloride resin composition according to claim 1, and the part is made of the vinyl chloride resin composition according to claim 1, and the broken part is broken by bending the closed cylindrical body. occluding parts.