JPH09296086A - Moistureproof polyvinyl chloride sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a moistureproof polyvinyl chloride sheet excellent in persistence of heat resistance during sheet processing and free of deterioration of initial discoloration by forming (B) a vinylidene chloride resin layer on at least one surface of (A) a vinyl chloride resin layer comprising (a) a vinyl chloride resin, (b) a calcium compd., (c) a zinc compd. and (d) hydrotalcite. SOLUTION: (B) A vinylidene chloride resin layer is formed on at least one surface of (A) a vinyl chloride resin layer having a thickness of 0.02 to 1mm and a softening temp. of 50 to 80 deg.C, and made of a compsn. comprising (a) 100 pts.wt. vinyl chloride resin of 500 to 1,000 in average degree of polymn., (b) 0.01-2 pts.wt. calcium compd. (e.g. calcium stearate), (c) 0.01-2 pts.wt. zinc compd. (e.g. zinc stearate) and (d) 0.01-5 pts.wt. hydrotalcite of the formula I (wherein W, X, Y and Z satisfy 2W+3X= Y+2Z, provided that 2<=W<=6 and 2<=m<=4). The vinylidene chloride compsn. used for the resin layer (B), the thickness of which is 1 to 500μm, may be a vinylidene chloride resin alone though not particularly limited in so far as the desired moistureproofing properties can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION Vinyl chloride resin has excellent physical property balance and cost performance among various resins, and is particularly used in a wide range of fields including food and pharmaceutical packaging due to its excellent moldability. The present invention relates to packaging materials for foods, pharmaceuticals and the like.

[0002]

2. Description of the Related Art A halogen-containing resin such as a vinyl chloride resin causes remarkable disadvantages when it is subjected to a heat-molding process due to thermal decomposition mainly caused by dehydrohalogenation, resulting in deterioration of physical properties and deterioration of color tone. . To avoid such disadvantages,
It is necessary to add one kind or several kinds of heat stabilizers at the time of sheet processing to suppress deterioration in the processing step. For such a purpose, a heat stabilizer in which an organic phosphite ester, a phenol compound, and an epoxy compound are added to a combination of metal compounds such as lead, cadmium, barium, and zinc has been used. However, metals such as cadmium, lead, and barium are highly toxic and easily cause problems during use or disposal, so without using a cadmium, lead, or barium-based metal compound stabilizer, use a calcium-zinc-based metal. A heat stabilizer in which an organic phosphite ester, a phenol compound, and an epoxy compound are added to a combination of compounds is used. However, thermal decomposition due to dehydrohalogenation, heat resistance persistence with it, and initial coloration (a phenomenon in which the color is initially colored due to the heat history during processing) prevent cadmium, lead, and barium metal compound stabilizers. It has the drawback of being inferior to the stabilizers contained.

In order to solve these drawbacks, a β-diketone compound represented by the following general formula is used as a heat stabilizer for calcium-zinc-based metal compound stabilizers, especially as an initial color-preventing agent. (Japanese Patent Laid-Open No. 52-47)
948). R-CO-CHX-CO-R (In the formula, X represents a hydrogen atom or an alkyl group having 1 to 2 carbon atoms, and R represents an alkyl group or an aryl group.) However, the recent large scale and high speed of calendar equipment Therefore, only a combination of a calcium-zinc-based metal compound stabilizer and other organic phosphite ester, a stabilizing aid of an epoxy compound diketone compound is insufficient in thermal stability, and further heat resistance persistence and initial coloration preventive property are obtained. It has been demanded.

Calcium compounds are used because they have the effect of not thermally decomposing, and zinc compounds are used because they have the effect of making initial coloring difficult.
However, a calcium compound has a problem that it tends to be initially colored, and a zinc compound must be used together to prevent the initial coloration. When the zinc compound is contained, it is called zinc burning during sheet processing. There was a problem that rapid thermal decomposition occurred and decomposed and turned black within a short time, resulting in poor heat resistance. The problem of zinc burning is polyhydric alcohol such as mannitol, sorbitol, pentaerythritol, dipentaerythritol, hydrotalcite, zeolite, oxide (calcium, magnesium), hydroxide (calcium, magnesium).
It is solved by adding a costabilizer represented by an inorganic salt such as. However, the stabilization time of the polyhydric alcohol substance is relatively short, and the zinc compound added for preventing the initial coloring tends to be incorporated into the structure, so that the initial coloring tends to deteriorate.

A hydrotalcite compound having a specific crystal structure is used as a stabilizer for a halogen-containing resin. The hydrotalcite compound has an effect of trapping and stabilizing hydrogen chloride generated by thermal decomposition of a vinyl chloride resin to neutralize it, and is used in combination with a calcium-zinc stabilizer to enhance the effect. The vinyl chloride resin sheet is produced by calender rolling, and as the lubricant to be added, higher fatty acid compounds such as stearic acid and lauric acid are mainly used. However, the acid-based lubricant having a carboxylic acid group has a drawback that the hydrotalcite compound and the carboxylic acid react with each other, the resulting magnesium soap compound is colored in red, and the hydrochloric acid scavenging effect is lost, resulting in poor initial coloring. It was
On the other hand, in recent packagings, especially pharmaceuticals and food packagings, the contents sensitive to the environment are increased, and especially in pharmaceuticals and the like, moisture may deteriorate the performance of the pharmaceuticals, and thus moisture resistance is strongly required.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a vinyl chloride sheet which is moisture-proof, has excellent heat resistance and durability during sheet processing, and does not deteriorate initial coloring.

[0007]

According to the present invention, the vinyl chloride resin layer (A) comprises 0.01 to 2 parts by weight of a calcium compound and 0.01 to 2 parts of a zinc compound based on 100 parts by weight of the vinyl chloride resin. Parts by weight, general formula [Mg _W · Al _X · (OH) _Y ·
(CO ₃ ) _Z ] mH ₂ O (W, X, Y, Z are 2W + 3X = Y
+ 2Z, W is 2 ≦ W ≦ 6, m is a positive number and 2 ≦ m ≦ 4).
0.01 to 5 parts by weight of the composition, or 100 parts by weight of the vinyl chloride resin, calcium compound 0.01 to
2 parts by weight, compounds 0.01 to 2 parts by weight of zinc, the formula _{[Mg W · Al X · (OH} ) Y · (CO 3) Z ] mH ₂ O (W,
X, Y and Z are positive numbers satisfying 2W + 3X = Y + 2Z and W
Is 2 ≦ W ≦ 6, m is a positive number and 2 ≦ m ≦ 4) 0.01 to 5 parts by weight of the hydrotalcite compound, 0.1 to 5 parts by weight of epoxidized vegetable oil, and β-diketone compound 0. .0
1 to 1 part by weight and a composition containing 0.01 to 2 parts by weight of an ester compound, a vinylidene chloride resin layer (B) is provided on at least one surface of the resin layer (A), and a vinyl chloride resin layer. The vinyl chloride resin (A) has an average degree of polymerization of 500 to 1000, and the ester compound is 1 to 3
It is a compound consisting of high valency glycerin and higher fatty acids.
The soft temperature of the vinyl chloride resin layer (A) according to the soft temperature test of IS K6734 is 50 to 80 ° C., the thickness of the vinyl chloride resin layer (A) is 0.02 to 1 mm, and the vinylidene chloride resin layer (B) is Is a vinyl chloride sheet having a thickness of 1 to 500 μm.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Vinyl chloride resin layer (A) of the present invention
The vinyl chloride resin used for has an average degree of polymerization of 500 to 1
If the average degree of polymerization is less than 500, the melt viscosity becomes low, the stiffness of the sheet decreases, and the processability of the sheet such as a calendar becomes poor. Average degree of polymerization is 1000
When it exceeds, the melt viscosity becomes high, and a high temperature is required at the time of sheet processing, which hinders sheet production.

The calcium compound used in the vinyl chloride resin layer (A) includes C _{8 to} C ₂₂ such as carbonates, silicates, orthophosphates, heptanoates, 2-ethylhexylates and stearates. Higher fatty acid salts of 1,2-hydroxystearate, lactate, citric acid, gluconate, sorbate, rosinate, ethyl acetoacetate, benzoate, isodecanoate, neodecanoate, naphthenic acid Examples thereof include salts and hydroxides. The amount of calcium compound added is 100 parts by weight of vinyl chloride resin,
0.01 to 2 parts by weight is suitable, preferably 0.05 to 1
Parts by weight. If it is less than 0.01 part by weight, zinc burning will occur and the thermal stability will be poor, and if it is more than 2 parts by weight, the initial coloring will be poor.

Examples of the zinc organic compound used in the vinyl chloride resin layer (A) include high-grade C _{8 to} C ₂₂ carbonates, orthophosphates, heptanoates, 2-ethylhexylates, stearates and the like. Examples thereof include fatty acid salt, rosin acid salt, dibutyldithiocarbamate salt, salicylate salt, isodecanoic acid, neodecanoic acid salt and naphthenic acid salt. The amount of the zinc compound added is appropriately 0.01 to 2 parts by weight, preferably 0.05 to 100 parts by weight of the vinyl chloride resin.
１1 part by weight. If the addition amount is less than 0.01 parts by weight, the initial coloration is poor, and if it is more than 2 parts by weight, zinc burning is rapidly caused and the thermal stability is deteriorated.

[0011] hydrotalcite compound used in the layer Vinyl chloride resin (A) has the general formula [Mg _W · Al _X · (O
H) _Y · (CO ₃ ) _Z ] mH ₂ O (where W, X, Y and Z are positive numbers satisfying 2W + 3X = Y + 2Z, 2 ≦ W ≦ 6, m
Is a positive number represented by 2 ≦ m ≦ 4), but generally magnesium hydrotalcite represented by the formula (Mg ₆ · Al ₂ · (OH) ₁₆ · (CO ₃ )) 2H ₂ O The compound is used. The hydrotalcite compound may be a natural product or a synthetic product. As a synthesis method, for example, Japanese Patent Publication No.
-2280, 50-3039, 51-2912
Known methods in No. 9 can be exemplified. The hydrotalcites in the present invention can be used without limitation in particle size, and the surface thereof may be covered with higher fatty acid such as stearic acid, higher fatty acid amide, higher fatty acid ester, or wax. The addition amount of the hydrotalcite compound is 0.01 to 5 relative to the vinyl chloride resin.
Parts by weight, preferably 0.1 to 1 part by weight.
If the amount is less than 0.01 part by weight, the effect is not recognized, and if the amount is more than 5 parts by weight, the improvement in performance is small, and the appearance is likely to be deteriorated due to foaming and the mechanical strength is likely to decrease.

Epoxidized vegetable oil can be added to the vinyl chloride resin layer (A) composition of the present invention. Examples of the epoxidized vegetable oil include epoxidized linseed oil, epoxidized soybean oil, epoxidized castor oil, epoxidized safflower oil, epoxidized linseed oil fatty acid butyl, octyl epoxystearate, and 3- (2-xenoxy) -1. Two
-Epoxy propane, epoxidized polybutadiene, di-2-ethylhexyl epoxyhexahydrophthalate, di-n-octyl epoxyhexahydrophthalate, bis (9,10-epoxystearyl) epoxyhexahydrophthalate and the like can be mentioned. The addition amount of the epoxidized vegetable oil is preferably 0.1 to 5 parts by weight with respect to 100 parts by weight of the vinyl chloride resin. If it is less than 0.1 parts by weight, the fluidity of the vinyl chloride resin is deteriorated and the calender processability is impaired. If the amount is more than 5 parts by weight, the soft temperature of the sheet will decrease,
The rigidity of the sheet becomes low, which tends to cause problems in sheet processing and formability.

An organic phosphite compound may be added to the vinyl chloride resin layer (A) composition. Examples of the organic phosphite compound include tris (nonylphenyl) phosphite, 2-tert-butyl-α (3-t
ert-Butyl-4-hydroxyphenyl) p-cumenylbis (p-nonylphenyl) phosphite, 4′4-
Isopropylidene - diphenol alkyl (C ₁₂ ~
C ₁₅₎ phosphite.

A β-diketone compound may be added to the vinyl chloride resin layer (A) composition. The amount of the β-diketone compound added is preferably 0.01 to 1 part by weight, based on 100 parts by weight of the vinyl chloride resin. However, there is no effect by increasing the dose. Vinyl chloride resin layer (A)
To improve the light stability of the composition, or when used as a packaging material after sheet processing, an ultraviolet absorber may be added for the purpose of preventing photodegradation of the contents. Examples thereof include benzophenone-based, benzotriazole-based, salicylate-based, substituted acrylonitrile-based, various metal salts, or metal chelates, particularly nickel or chrome salts, or chelates, triazine-based, piperidine-based, and the like.

In the vinyl chloride resin layer (A) composition, the intermolecular force of the vinyl chloride resin is weakened by making it penetrate between the vinyl chloride resin molecules, and the heating temperature is lowered to increase the fluidity, and at the same time, the second transition temperature is lowered. In order to enable the micro-Brownian motion of the vinyl chloride resin molecular segment and obtain a flexible elastic gel, a plasticizer usually used as an additive for vinyl chloride resin can be added. Examples of the plasticizer include phthalic acid ester compounds, aliphatic dibasic acid ester compounds,
Examples thereof include phosphoric acid ester compounds, hydroxy polycarboxylic acid ester compounds, fatty acid ester compounds, polyhydric alcohol ester compounds, polyester compounds and the like.

The vinyl chloride resin layer (A) sheet of the present invention is produced, for example, by a calender rolling method, and an ester compound is used as a lubricant to be added. The ester compound is a compound formed by an ester bond between a long-chain fatty acid and an alcohol. Fatty acids include long-chain saturated and unsaturated monocarboxylic acids, dicarboxylic acids, and oxycarboxylic acids.Alcohols include monohydric alcohols such as butanol and octanol, and polyalcohols such as ethylene glycol, glycerin, pentaerythritol, and sorbitol. There are hydric alcohols, and many ester compounds are made with a combination of acid and alcohol. The ester compound used must have all of its carboxylic acid groups reacted with alcohol to form an ester bond. This is because the hydrotalcite compound and the carboxylic acid react with each other, the resulting magnesium soap compound is colored red, the hydrochloric acid scavenging effect is lost, and the initial coloring is deteriorated. For this reason, the ester compound used is preferably a mono- to tri-valent ester compound of glycerin and a fatty acid, and the addition amount is 0.1 to 100 parts by weight of the vinyl chloride resin.
01 to 2 parts by weight is preferred. If the addition amount is less than 0.01 parts by weight, it tends to be a problem during sheet processing such as calendering method, and if the addition amount is more than 2 parts by weight, the lubricity becomes excessive.
A sheet with a good appearance cannot be obtained. Examples of the ester compounds include stearic acid glyceride lubricants such as stearic acid monoglyceride, stearic acid diglyceride, and stearic acid triglyceride, oleic acid glyceride lubricants, and palmitic acid glyceride lubricants. The thickness of the vinyl chloride resin layer (A) is 0.02 to 1
mm is preferable, and more preferably 0.05 to 0.6 m
m. If it is thinner than 0.02 mm, it is difficult to process the sheet, and if it is thicker than 1 mm, it is difficult to process the sheet.

The vinyl chloride resin layer (A) of the present invention comprises JI
According to the soft temperature test shown in SK6734, that is, Crushberg soft temperature measurement, the soft temperature is 50 to 80.
℃ is preferable, the higher the softening temperature, the more heat resistance, that is, the change in appearance when heated is small, but if it is higher than 80 ℃, it tends to be a problem during sheet processability and molding.
When the temperature is lower than 0 ° C, the heat resistance is poor, the appearance change upon heating becomes large, and a problem tends to occur during molding, and more preferably 55 to 70 ° C. Vinyl chloride resin layer (A)
Is a vinyl chloride-vinyl acetate copolymer, a lubricant, a cross-linking agent, a pigment, a filler, a foaming agent, an antistatic agent, an antifogging agent, a plate-out prevention agent, a surface treatment, depending on the desired sheet processability and performance. Agents, processing aids, release agents, reinforcing materials and the like may be included.

The vinylidene chloride resin composition used in the vinylidene chloride resin layer (B) of the present invention is not particularly limited as long as the required moisture resistance can be obtained, and vinylidene chloride resin monomer can be used as another resin for improving processability. A copolymer with
Examples of the monomer to be copolymerized include vinyl chloride, vinyl acetate, acrylonitrile, methyl methacrylate, methacrylic acid, methyl acrylate, ethyl acrylate and the like, and they can be used alone or in combination of two or more. Further, as is known, an antiblocking agent such as silica may be added.

The method for producing the vinylidene chloride resin layer (B) is not particularly limited as long as the required moisture resistance is obtained, but the vinylidene chloride resin composition is formed into a sheet by a hot melt extrusion method, or a vinyl chloride resin layer ( A vinylidene chloride resin composition obtained by emulsifying A) as a base material or dissolving it in a solvent such as tetrahydrofuran,
Using the vinyl chloride resin layer (A) as a base material, coating and drying,
There is a method of forming a coating film on the vinyl chloride resin layer (A). The method for laminating the vinylidene chloride resin layer (B) and the vinyl chloride resin layer (A) is not particularly limited as long as the adhesion between the layers can be obtained, and examples thereof include dry lamination, extrusion lamination, hot pressing and solution coating. Is mentioned. Further, an adhesive such as urethane, isocyanate, acrylic, polyester, vinyl acetate-based adhesive may be interposed between the layers in order to improve the adhesion between the layers. The thickness of the vinylidene chloride resin layer (B) is preferably 1 to 500 μm, and if it is thinner than 1 μm, it is difficult to obtain moisture resistance, and if it is thicker than 500 μm, it tends to be a problem because molding is difficult, and preferably 1 to 30 μm.
It is 0 μm, more preferably 1 to 250 μm.

[0020]

The present invention will be described in detail below with reference to examples. <Examples 1 to 4> Vinyl chloride resin 1 having an average degree of polymerization of 700
Each of the additives shown in Table 1 was mixed with 00 parts by weight and kneaded between two rolls at 155 ° C for 3 minutes, and then hot-plate pressed at 140 ° C for 2 minutes to obtain a sheet-shaped vinyl chloride resin layer (A). It was The obtained vinyl chloride resin layer (A) was evaluated for blackening time, initial coloring, softening temperature, and calender processability.
Next, one side or both sides of the obtained vinyl chloride resin layer (A) is anchor-coated and dried, and then vinylidene chloride resin emulsion (L-530, manufactured by Asahi Kasei Kogyo Co., Ltd.)
Is coated and dried to obtain a vinylidene chloride resin layer (B),
Secondary workability and moisture resistance were evaluated. The agent for the anchor coat between the (A) and (B) layers was compounded with Rack Skin UB-520: U-4000 = 10: 1 manufactured by Seiko Kasei Co., Ltd. and then diluted 5 times with ethyl acetate. Was used.

<Examples 5 to 7> 100 parts by weight of a vinyl chloride resin having an average degree of polymerization of 700 was mixed with the additives shown in Table 2 and kneaded between two rolls at 155 ° C for 3 minutes, and then at 140 ° C for 2 minutes. A hot plate press was performed for a minute to obtain a vinyl chloride resin layer (A).
The obtained vinyl chloride resin layer (A) was evaluated for blackening time, initial coloring, softening temperature, and calender processability. Next, the vinylidene chloride resin layer (B) obtained by the hot melt extrusion method was laminated on one side or both sides of the obtained vinyl chloride resin layer (A), and the secondary workability and moisture resistance were evaluated. During lamination, the same anchor coating agent as in Example 1 was used between layers (A) and (B).

<Comparative Examples 1 to 12> 100 parts by weight of a vinyl chloride resin having an average degree of polymerization of 700 was mixed with the additives shown in Tables 3, 4, and 5 and kneaded between two rolls at 155 ° C. for 3 minutes.
It was hot-pressed at 140 ° C. for 2 minutes to obtain a vinyl chloride resin layer (A). The obtained vinyl chloride resin layer (A) was evaluated for blackening time, initial coloring, softening temperature, and calender processability. Next, obtained vinyl chloride resin layer (A)
After one side or both sides are anchor-coated and dried, a vinylidene chloride resin emulsion (L-530, manufactured by Asahi Kasei Co., Ltd.) is applied and dried to obtain a vinylidene chloride resin layer (B). The workability and moisture resistance were evaluated.
The same anchor coating agent as in Example 1 was used between the (A) and (B) layers. Comparative Example 9 is an example not containing the vinylidene chloride resin layer (B). <Comparative Example 13> Vinyl chloride resin 10 having an average degree of polymerization of 300
Add 0 parts by weight of each additive shown in Table 5 to 2 at 155 ° C.
After kneading between the main rolls for 3 minutes, hot plate pressing was attempted at 140 ° C. for 2 minutes, but a good vinyl chloride resin layer (A) was not obtained. <Comparative Example 14> Vinyl chloride resin 1 having an average degree of polymerization of 1300
Each of the additives shown in Table 5 was added to 00 parts by weight and kneaded between two rolls at 155 ° C. for 3 minutes, and hot plate pressing was attempted at 140 ° C. for 2 minutes. A good vinyl chloride resin layer (A) was obtained. I couldn't get it.

Each evaluation method is as follows. (1) Blackening time (heat resistance stability) The obtained vinyl chloride resin layer (A) was placed in a gear type aging tester set at 180 ° C., and samples were taken out every 10 minutes until browning or blackening. The time (minutes) was measured. (2) Initial coloration The obtained vinyl chloride resin layer (A) is laminated to a thickness of 1 mm, and 1
Preheat at 80 ° C. for 3 minutes, pressurize at 100 kg / cm ² × 2 minutes to make a plate, and measure the yellowness (b value) of the plate with a colorimeter.
Was measured. (3) Soft temperature Measured according to JIS K6734. (4) Calender processability During the production and kneading of the vinyl chloride resin layer (A), the peelability of the sheet from the calender roll and the stains on the roll such as bleed and bloom were visually observed. ○ …… No problem, × …… There is a problem. <5> Secondary workability Molded with a hot platen press molding machine with a plug. The shape of molding and the feeding of the sheet after molding were visually observed. ○ …… No problem, × …… There is a problem. <6> Moisture Proof Property Tables 1 to 5 show the evaluation results of Examples and Comparative Examples measured according to JIS Z0208.

[0024]

[Table 1]

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

[0028]

[Table 5]

[0029]

As described above, according to the present invention, it is possible to obtain a vinyl chloride resin sheet which has excellent heat resistance and durability during sheet processing, does not deteriorate initial coloring, and has moisture resistance.

Claims (7)

[Claims] 1. The vinyl chloride resin layer (A) comprises 0.01 parts of a calcium compound based on 100 parts by weight of the vinyl chloride resin.
˜2 parts by weight, a compound of zinc 0.01 to 2 parts by weight, and a hydrotalcite compound of the general formula (I) 0.01
The resin layer (A) is composed of a composition containing 5 parts by weight.
A vinyl chloride sheet having moisture resistance, which has a vinylidene chloride resin layer (B) on at least one side thereof. [Mg _W · Al _X · (OH) _Y · (CO ₃ ) _Z ] mH ₂ O (I) However, W, X, Y, and Z are positive numbers satisfying 2W + 3X = Y + 2Z, and W is 2 ≦. W ≦ 6, m is a positive number, and 2 ≦ m ≦ 4. 2. The vinyl chloride resin layer (A) comprises 0.01 parts of a calcium compound based on 100 parts by weight of the vinyl chloride resin.
˜2 parts by weight, a compound of zinc 0.01 to 2 parts by weight, and a hydrotalcite compound of the general formula (I) 0.01
5 parts by weight, 0.1 to 5 parts by weight of epoxidized vegetable oil, 0.01 to 2 parts by weight of an ester compound, 0.01 to 1 part by weight of a β-diketone compound are added, and the resin layer (A A vinylidene chloride resin layer (B) on at least one surface of (1), and a vinyl chloride sheet having moisture resistance. [Mg _W · Al _X · (OH) _Y · (CO ₃ ) _Z ] mH ₂ O (I) However, W, X, Y, and Z are positive numbers satisfying 2W + 3X = Y + 2Z, and W is 2 ≦. W ≦ 6, m is a positive number, and 2 ≦ m ≦ 4. 3. The moisture-proof vinyl chloride sheet according to claim 2, wherein the ester compound comprises a compound of glycerin having a valence of 1 to 3 and a higher fatty acid. 4. The moisture-proof vinyl chloride sheet according to claim 1, wherein the vinyl chloride resin of the vinyl chloride resin layer (A) has an average degree of polymerization of 500 to 1000. 5. The moisture-proof chlorinated salt according to claim 1, 2, 3 or 4, wherein the vinyl chloride resin layer (A) has a softening temperature of 50 to 80 ° C. according to a softening temperature test of JIS K6734. Vinyl sheet. 6. The thickness of the vinyl chloride resin layer (A) is 0.02.
~ 1 mm, Claims 1, 2, 3, 4
Alternatively, the vinyl chloride sheet having the moisture-proof property according to item 5. 7. The vinylidene chloride resin layer (B) has a thickness of 1 to
The thickness is 500 μm.
A vinyl chloride sheet having moisture resistance according to 4, 5, or 6.