JPH11199736A - Wrap film made from vinylidene chloride resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vinylidene chloride resin wrap film having sufficient close adhesion, possessing excellent unrolling properties even after a heat history, and having good transparency, etc. SOLUTION: There is provided a vinylidene chloride resin wrap film comprising an epoxidized vegetable oil, (1) at least one glycerol fatty acid ester, and (2) an aliphatic dibasic acid ester, wherein the total content of (1) and (2) is 3 wt.% or above, the content of (2) is 0.05-0.5 wt.%. Desirably the glycerol fatty acid ester is an acetylated monoglyceride, and the aliphatic dibasic acid ester is dibutyl sebacate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrap film used for simple packaging of foods and the like, and more particularly, to a film wrapped under a high temperature in summer, which maintains sufficient adhesion and has improved drawability. Relates to a vinylidene chloride-based resin wrap film having excellent transparency and the like.

[0002]

2. Description of the Related Art Vinylidene chloride-based resin wrap films have been used in many ordinary households as simple packaging materials for foods and the like because of their excellent properties such as adhesion and gas barrier properties. In recent years, vinylidene chloride-based resin wrap films have been required to function as simple packaging materials.In particular, consumers are strongly demanding good drawability, which is a contradictory property while ensuring sufficient adhesion. Have been. The term "adhesiveness" as used herein means the adhesiveness between the food container and the wrap film, and the "pull-out property" refers to the peeling of the wrap films when the wound wrap film in the decorative box is pulled out of the box. Means gender.

Conventionally, in producing a vinylidene chloride-based resin wrap film, a vinylidene chloride-based resin is used as a stabilizer such as epoxidized vegetable oil or a plasticizer such as acetyltributyl citrate (hereinafter, referred to as "plasticizer") in order to obtain processability and physical properties. It is known that ATBC is added. In Japanese Patent Publication No. 59-46984, acetylated monoglyceride (hereinafter, referred to as ACGL), which is a kind of glycerin fatty acid ester, is used in place of a conventional plasticizer or in combination with a conventional plasticizer. Thus, it is disclosed that a food packaging film having good transparency and good adhesiveness of a wrap film is obtained.

[0004]

However, generally, a wrap film is put in a decorative box in a state of being wound around a paper tube (this state is called a wound wrap film).
Until the consumer uses it, it usually receives a heat history during distribution. For example, when only ATBC is used as the plasticizer, the wrap film becomes a film when subjected to a long-term heat history in a storage warehouse in the middle of summer when the temperature reaches 40 ° C. or higher, in addition to the history during normal distribution. Suddenly the close contact of
As a result, the drawability of the film is reduced, and when the consumer who purchases the film tries to pull out the wrap film in a kitchen in the middle of winter (for example, at 5 ° C.), the film may be broken.

In Japanese Patent Publication No. 59-46984, although the adhesion is improved by using ACGL, no reference is made to the drawability, which is a practically required characteristic of a wrap film. Furthermore, the present inventors have studied that there is a problem that the content of the aliphatic dibasic acid ester used in combination with ACGL is too large, so that the drawability is deteriorated. In the present invention, there is provided a vinylidene chloride-based resin wrap film which solves such a problem, maintains sufficient adhesiveness, has excellent drawability even when subjected to heat history, and further has good transparency and the like. With the goal.

[0006]

Means for Solving the Problems The inventors of the present invention have made intensive studies from the viewpoints of adhesion and drawability, and as a result, have found that an aliphatic dibasic used in combination with a glycerin fatty acid ester, which the prior art has not found at all. It has been found that the content of the acid ester has a specific range. That is, the present invention is as follows. [1] A vinylidene chloride-based resin wrap film containing an epoxidized vegetable oil, (1) at least one glycerin fatty acid ester, and (2) an aliphatic dibasic acid ester,
A vinylidene chloride-based resin, wherein the total content of (1) and (2) is 3% by weight or more, and the content of (2) is 0.05 to 0.5% by weight. Wrap film. [2] The vinylidene chloride-based resin wrap film of the above-mentioned [1], wherein the glycerin fatty acid ester is an acetylated monoglyceride. [3] The vinylidene chloride-based resin wrap film of the above-mentioned [1] or [2], wherein the aliphatic dibasic acid ester is dibutyl sebacate.

Hereinafter, the contents of the present invention will be described. The most different points of the present invention from the prior art are the total content of aliphatic dibasic acid esters used in combination with glycerin fatty acid esters and the content of aliphatic dibasic acid esters.
The role of the constituent element of the present invention, which is different from the above-mentioned conventional technology, is to appropriately derive both of the contradictory characteristics of adhesiveness and drawability. First, the glycerin fatty acid ester and the aliphatic dibasic acid ester used in the wrap film of the present invention will be described with reference to FIGS. FIG. 1 and FIG. 2 are diagrams showing the characteristics of the quantitative effect in a combined system of a glycerin fatty acid ester and an aliphatic dibasic acid ester in the wrap film of the present invention, and correspond to the results of Examples and Comparative Examples. ing.

FIG. 1 shows the adhesion (work volume, work amount) due to aging of a film at 40 ° C. (corresponding to the heat history in a warehouse in the middle of summer).
g · cm / 25 cm ² ). Similarly, FIG. 2 shows the drawability (peak value,
g / 30 cm width). ○, △, so that the level of the prior art and the present invention can be easily understood.
×, □. In FIGS. 1 and 2, a circle indicates a vinylidene chloride-based resin wrap film containing a predetermined amount of a glycerin fatty acid ester and an aliphatic dibasic acid ester used in the present invention (Example 1, Wrap No. 1 in Table 1). To
In the case of a vinylidene chloride-based resin wrap film containing only a glycerin fatty acid ester as a plasticizer (the wrap film described in Japanese Patent Publication No. 59-46984: Comparative Example 1, Wrap No. 2 in Table 1), a mark Δ indicates a cross. The mark indicates the case of a vinylidene chloride-based resin wrap film containing an amount of an aliphatic dibasic acid ester used in combination with a glycerin fatty acid ester as a plasticizer in an amount larger than the required amount of the present invention (Japanese Patent Publication No. 59-46).
Wrap film described in JP-A-984: Comparative Example 2 in Table 1, Wrap No. 3), □ indicates ATB as a plasticizer
In the case of a vinylidene chloride-based resin wrap film containing only C (Comparative Example 3, Wrap No. 4 in Table 1), each additive composition is shown in Table 1. The dashed line with a work amount of 12 g · cm / 25 cm ² running in parallel with the axis of aging in FIG.
The minimum value of the practical adhesion level was set to the peak value of 80 g /
The dashed line with a width of 30 cm indicates the maximum value of the practical level of drawability (the level at which problems such as film breakage are unlikely to occur even when the wound wrap film is pulled out of the decorative box in a kitchen in the middle of winter (for example, 5 ° C.)). I have.

In FIGS. 1 and 2, AT is used as a plasticizer.
Wrap film containing BC only (of Comparative Example 3) (marked with □)
In this case, the adhesion is at a practical level (work amount is 12 g · cm / 2).
(5 cm ² or more level), but when subjected to the above-mentioned heat history, the drawability is not stabilized and the change with time continues to increase (peak value exceeds 80 g / 30 cm width). Then, there is a problem that the film is broken. In other words, the drawability deteriorates, and it becomes useless. In the case of the wrap film (x mark) containing the aliphatic dibasic acid ester used in combination with the glycerin fatty acid ester in a larger amount than the predetermined amount of the present invention (indicated by "x"), the adhesion was at a practical level (working amount was 12 g).・
cm / 25 cm ² or more), but with poor extractability (peak value of 80 g / 3).
(Level exceeding 0 cm width) Stabilization over time. Furthermore, in the case of the wrap film (marked with △) containing only the glycerin fatty acid ester (marked with △), the drawability is stabilized at a preferable practical level even under the heat history,
It can be seen that the performance as a wrap film is lost because the adhesiveness does not satisfy a sufficient practical level.

On the other hand, the wrap film (marked with ○) of the present invention (of Example 1) has a sufficient practical level of adhesiveness within a predetermined content ratio of glycerin fatty acid ester and aliphatic dibasic acid ester. Thus, it has been shown that even with the above-mentioned heat history, it has good drawability and excellent stability over time. That is, the present invention particularly selects one or more glycerin fatty acid esters and aliphatic dibasic acid esters as additives, and selects the added amount within a certain range, so that the wrap film receives, for example, heat history. In some cases, it has been found that the contradictory characteristics of good adhesion and excellent drawability are compatible, and the present invention has been achieved.

The fatty acid of the glycerin fatty acid ester (1) in the present invention is a monocarboxylic acid in which carbon atoms are bonded in a chain. Specifically, acetic acid having the simplest structure in this series is used. First, caproic acid, caprylic acid,
Capric acid, lauric acid, oleic acid and the like can be mentioned. The glycerin fatty acid ester (1) is a glycerin monoester such as glycerin monolaurate, which has an acyl group formed from a fatty acid of acetic acid or more in at least one of the three hydroxyl groups of glycerin, and glycerin dioleate. Glycerin diesters such as glycerin monocaprate monolaurate, glycerin tricaproate, glycerin tricaprylate, glycerin tricaprate, glycerin trilaurate, glycerin dicaprate monolaurate, glycerine monocaprate It is a mixture of one or more glycerin triesters such as dilaurate, which is sticky to the film. Undesirable because it seems)
From the viewpoint of reducing the amount of glycerin triesters, glycerin triesters and glycerin monoesters, and / or glycerin diesters when using a mixture of glycerin diesters are more preferred. Is more preferable. And ACGL which is one kind of glycerin fatty acid ester is more preferable.

ACGL has at least one of the three hydroxyl groups of glycerin has an acyl group formed by esterification with a higher fatty acid having 10 to 14 carbon atoms as a main component, and the remaining hydroxyl groups have It is a mixture of one or more acylglycerols having an acyl group formed by esterification having 2 carbon atoms. Acyl acetic acid, acetic anhydride, glycerin triacetate, and the like as a raw material of the acyl group having 2 carbon atoms of the acyl glycerin include those having 10 to 10 carbon atoms.
As the acyl group raw material of No. 14, crude or purified lauric acid obtained by fractionating and refining coconut oil fatty acids, coconut oil hardened oils, and natural fats and oils can be used. If the acyl group of the acylglycerin is less than the above range, it is not suitable because it is likely to be extracted from the film, and if it is more than that, the transparency of the film is lowered.
It is more desirable that the content of the acyl group containing -14 as a main component be as high as possible. Specifically, glycerin diacetomonocaprate, glycerin monoacetodicaprate, glycerin diacetomonolaurate, glycerin monoacetodilaurate,
A mixture of one or more ACGLs containing glycerin monoacetodimyristate, glycerin diacetmonomyristate monoglyceride as a main component, and particularly a mixture of one or more ACGLs containing glycerin diacetomonolaurate as a main component Is preferred.

The aliphatic dibasic acid ester (2) in the present invention is one which is conventionally used as a plasticizer for vinylidene chloride-based resin, and specifically, n-adipic acid
Adipate esters such as dibutyl, dibutyl adipate, di-n-hexyl adipate, di-2-ethylhexyl adipate, dioctyl adipate, azelate esters such as di-2-ethylhexyl azelate, octyl azelate, Dibutyl sebacate (hereinafter referred to as D
BS), and sebacate esters such as di-2-ethylhexyl sebacate.
Sebacic esters such as BS are more preferred.

In the present invention, the total content of the glycerin fatty acid ester (1) and the aliphatic dibasic acid ester (2) is 3% by weight or more, and the content of the aliphatic dibasic acid ester (2) is not less than 3% by weight. Is important to be 0.05 to 0.5% by weight. When the total content of the glycerin fatty acid ester (1) and the dibasic acid ester (2) is less than 3% by weight (Comparative Example 4, Wrap No. 13 in Table 2), the adhesion becomes insufficient. In addition, it becomes brittle, so that the cuttability is deteriorated and an unpleasant odor is liable to be generated due to decomposition during extrusion. When the total content of the glycerin fatty acid ester (1) and the dibasic acid ester (2) exceeds 10% by weight (Example 10, Wrap No. 14 in Table 2), it is practical in terms of adhesion and drawability. Although there is no problem, the transparency is insufficient. Therefore, the total content of the glycerin fatty acid ester (1) and the dibasic acid ester (2) is 3 to
Preferably it is 10% by weight. On the other hand, when the content of the aliphatic dibasic acid ester (2) is less than 0.05% by weight (Comparative Example 5, wrap No. 26 in Table 3), the adhesiveness becomes insufficient, and 0 If it exceeds 0.5% by weight (Comparative Example 6, lap No. 27 in Table 3), the drawability when receiving the above-mentioned heat history will be deteriorated.

Further, the total content of the glycerin fatty acid ester (1) and the aliphatic dibasic acid ester (2) and the content of the aliphatic dibasic acid ester (2) are more preferably 4 to 7 for the former. Wt% range, the latter being from 0.08 to 0.
It is in the range of 3% by weight. It is essential that the wrap film of the present invention contains an epoxidized vegetable oil from the viewpoint of suppressing a change in the color tone of the film. Here, the epoxidized vegetable oil is a known stabilizer for vinylidene chloride resin extrusion processing obtained by epoxidizing edible fats and oils. For example, epoxidized soybean oil, epoxidized linseed oil (hereinafter referred to as ELO) and the like are preferable, and from the viewpoint of suppressing a change in color tone of the film and preventing stickiness due to bleeding, the amount is preferably 0.5 to 0.5% based on the amount of the composition. About 3% by weight, more preferably 1 to
About 2% by weight is used.

The vinylidene chloride-based resin in the present invention is a resin which is conventionally known for a wrap film. The vinylidene chloride component has a vinylidene chloride content of 85 to 97% by weight, and an acrylate such as vinyl chloride, methyl acrylate and butyl acrylate, methyl methacrylate, etc. 1 copolymerizable with methacrylates such as acrylate and butyl methacrylate, and vinylidene chloride such as acrylonitrile and vinyl acetate
And a copolymer resin having a weight average molecular weight of 80,000 to 130,000, comprising 15 to 3% by weight of one or more kinds of monomers. In the wrap film of the present invention, as long as the effects of the present invention are not impaired, other plasticizers used for known food packaging materials, weather resistance improvers, coloring agents such as dyes or pigments, anti-fogging agents, nuclei Agents, oligomers such as polyester, polymers such as MBS, and the like. The thickness of the wrap film of the present invention is not particularly limited, but is generally 5 to 20 μm.

The film of the present invention may be, for example, a ribbon blender or a Henschel mixer in an atmosphere of 50 ° C. containing a vinylidene chloride resin, a glycerin fatty acid ester, a dibasic acid ester, and other additives as required. After aging for 24 hours, the resin composition is melt-extruded and inflation-stretched. The glycerin fatty acid ester may be added at any step before or during the polymerization of the vinylidene chloride resin. Further, it may be mixed with the above-mentioned aliphatic dibasic acid ester and used at the same time, or may be used separately from the glycerin fatty acid ester.

Next, the evaluation method used in the present invention will be described below. <Adhesion> This method assumes that food is wrapped in a wrap film in a non-heated, around 5 ° C winter kitchen.
This is to evaluate the adhesion between the wrap films. This is also to confirm whether sufficient adhesion can be obtained even under the disadvantageous condition of low temperature (5 ° C.). << Adhesion in Case of Not Receiving Heat History >> Two cylinders having a bottom area of 25 cm ² are prepared in a constant temperature room at 5 ° C. A filter paper having the same bottom area as the cylinder is attached to each bottom surface in advance.
The wrap film is tensioned and fixed so that no wrinkles are formed on the bottom surface side of these cylinders, and the two cylinders are joined so that they are perfectly overlapped with each other, and are pressed under a load of 500 g for 1 minute. Next, the work required for peeling the glass surface and the wrap film surface from each other perpendicularly to each other at a speed of 5 mm / min using a universal telecompression tester TCM-200 manufactured by Shinko Tsushin Kogyo Co., Ltd. Measure. (Unit gcm / 2
5cm ² )

<< Adhesion in Case of Receiving Thermal History >> According to this method, a rolled wrap film wound in a decorative box while being wound on a paper tube can be stored in the middle of summer when the temperature reaches 40 ° C. or more. This is to evaluate the adhesiveness of the warehouse itself, assuming that it will receive the thermal history when placed in a warehouse for a long time. The rolled wrap film, which has been left in a room at 40 ° C for 3 months, is cooled down to a constant temperature room temperature of 5 ° C.
Next, the measurement was carried out based on the above-mentioned measurement method of “adhesion without heat history”. (Unit gcm / 25c
m ² ) Evaluation symbol Work amount Judgment ◎ 17 or more Satisfactory adhesion, excellent level ○ 12 to less than 17 Adhesion, practical level △ 10 to less than 12 Slightly adhesive × 10 Less than 10 Adhesion is very poor and not practical

<Pullability><< Pullability without heat history >> Length about 31c
m, a driving section (1 in FIG. 3) having a diameter of about 3.6 cm, and a length 3
A bearing type free roll consisting of a fulcrum shaft of 3 cm (2 in FIG. 3) is wound on a paper tube of a wound wrap film so that the center in the width direction of the wound wrap film and the center in the length direction of the free roll drive unit are aligned. (3 in FIG. 3) to integrate them. A hanger (4 in FIG. 3) in which a free roll integrated with the wound wrap film is hung on the load cell side of the upper part of a universal tensile compression tester TCM-200 manufactured by Shinko Tsushin Kogyo Co., Ltd. A bearing (5 in FIG. 3) mounted on a lowering movable body (5 in FIG. 3) at the lower part of the tester so that the 2) in FIG. 3 is parallel and the widthwise center of the wound wrap film is positioned vertically in the center of the hanger. The fulcrum shaft is inserted into 6) in FIG. 3 and fixed. Further, the wrap film integrated with the free roll (7 in FIG. 3) is peeled off and attached to a hanger suspended on the load cell side above the tester. Fix with double-sided tape without wrinkles. Then, in a constant temperature room at 5 ° C., the pull-down movable body (5 in FIG. 3) below the tester is pulled down at a speed of 1000 mm / min, and the wrap film (7 in FIG. 3) is drawn into a paper tube (3 in FIG. 3). And peel it off vertically. In this case, the peak value of the force required to peel the wrap film (7 in FIG. 3) from the paper tube (3 in FIG. 3) is used as a measured value of the pull-out property. (Unit g / 30
cm width)

<< Pullability in Case of Receiving Thermal History >> According to this method, the rolled wrap film wound in a decorative box in a state of being wound on a paper tube can be stored in the middle of summer when the temperature reaches 40 ° C. or more. This is to evaluate the pull-out performance of the warehouse, assuming that it will receive the heat history when placed in a warehouse for a long time. The rolled wrap film left in a room at 40 ° C for 3 months is cooled down to a constant temperature room temperature of 5 ° C. 5
The reason for setting to ° C. is to confirm whether sufficient drawability can be obtained even under disadvantageous conditions at low temperatures. Then
Based on the above-mentioned method of << pull-out property without heat history >>, the peak value of the force required when peeling the wrap film from the paper tube is used as a measured value of pull-out property. (Unit: g / 30 cm width) Evaluation symbol Peak value Judgment ◎ 65 or less Satisfactory withdrawability, excellent level ○ 65, 80 or less Good withdrawability, practical level △ 80, 100 or less Poor drawability, problematic for practical use x 100 excess Poor drawability, impractical

<Cutability> Twenty skilled panelists are prepared. Next, the rolled wrap film is 30 cm wide,
In a 5 ° C. constant temperature room (assuming use in a kitchen at around 5 ° C. in winter), 30 bottles each put in a Asahi Kasei Saran wrap cosmetic box having a length of 20 m were prepared. Then, the work of drawing out the wrap film about 50 cm at a time and cutting it with a saw blade was performed 15 times for each wrap, that is, 450 times in total. At that time, the number of cut troubles (cut film) was counted to evaluate the cut property. Evaluation symbol Number of cut troubles Judgment ◎ Less than 3 cuts Very few cut troubles, at an excellent level ○ 3 or more and less than 10 cuts Less troubles, at a practical level △ 10 or more and less than 20 cuts Many cut troubles, practical problems Yes × 20 times or more

<Transparency> According to ASTM-D-1003, the haze of the film unwound from the wound state was measured.
The transparency of the film is evaluated by the average value of six points (rounded). Evaluation symbol Haze (average of 6 points) Judgment ◎ 0.3 or less Very good transparency ０．４ 0.4 to 0.5 Good transparency △ 0.6 to 0.9 Transparency slightly poor × 1.0 Insufficient transparency <Odor><Smell> A glass cup filled with distilled water was sealed with a wrap film and heated for 3 minutes in a microwave oven, and the film odor immediately after was smelled by 20 skilled panelists, and the sensory results at that time The odor is evaluated on the basis of (A: not noticeable odor, B: slightly odorable but can be tolerated, C: smelled and unbearable). Evaluation symbol Criteria Judgment ◎ A ≧ 15 and C = 0 Almost no odor, excellent level of practical use レ ベ ル A ≧ 15, 1 ≦ C ≦ 5, slightly odor, or 10 ≦ A ≦ 14 and C ≦ 5 is practical level △ A ≦ 9 and C ≦ 5 Slight odor is noticeable, and inferior to practical level × C ≧ 6 Very odor is noticeable, not practical

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on Examples.
explain in detail.

[0025]

Example 1 and Comparative Examples 1-3 A vinylidene chloride resin having a weight average molecular weight of 90,000 (90% by weight of vinylidene chloride component and 10% by weight of vinyl chloride component), ELO, DBS,
And glycerin diacetomonolaurate ACGL (trade name “Poem G-0” manufactured by Riken Vitamin Co., Ltd.)
02 ") in a proportion of 93.98% by weight, 1.0% by weight, 0.11% by weight, and 4.91% by weight (5.02% by weight in total of ACGL and DBS). A total of 30 kg was mixed in a 50-liter ribbon blender for 5 minutes in an atmosphere of 50 ° C., aged at 40 ° C. for 24 hours, and passed through a 40 μm mesh to obtain a vinylidene chloride-based resin composition.

The above vinylidene chloride-based resin composition is supplied to a melt extruder by an extrusion film forming method, ie, melted, and the temperature of the molten resin at a slit outlet of an annular die attached to the tip of the extruder is 170 ° C. While controlling the heating conditions of the extruder so as to adjust the extrusion conditions, the extruder is extruded in a ring at an extrusion speed of 17 kg / hr, supercooled, then inflation-stretched into a tubular film, and the tubular film is pinched and folded flat. A double-layered film having a folding width of 360 mm and a thickness of 10 μm was wound at a winding speed of 20 m / min. This film is slit into a width of 30 cm, and is peeled off into a single film, wound up 20 m onto a paper tube having an outer diameter (diameter) of 4.1 cm and a length of 31 cm to obtain a wound wrap film having a thickness of 10 μm. Was. The wound wrap film is stored at 28 ° C. for 7 days after the film is formed, and then at 40 ° C. for 2 days.
Storage for days (this is a condition presumed to be close to the temperature process in the production and distribution of normal wrap film). It was set to 1.

Next, without adding DBS to vinylidene chloride-based resin (vinylidene chloride component being 90% by weight and vinyl chloride component being 10% by weight), only ACGL was used, and the addition amount was determined as shown in Table 1. Is the lap No. The same conditions as in Lap No. 1 were applied. 2 was obtained. Then, DBS and ACG for vinylidene chloride-based resin (vinylidene chloride component is 90% by weight and vinyl chloride component is 10% by weight)
L, except that the amount of L was determined as shown in Table 1. 1
Lap No. 3 was obtained.

Further, a vinylidene chloride resin (a vinylidene chloride component is 90% by weight and a vinyl chloride component is 10% by weight)
Lap N, except that only ATBC was used without adding DBS and ACGL to
o. The same conditions as in Lap No. 1 were applied. 4 was obtained. Lap No. Table 1 shows the results of evaluating the adhesiveness and the like of the wrap film for Nos. 1 to 4.

According to the results shown in Table 1, in the wrap film of the present invention containing a required amount of the glycerin fatty acid ester and the aliphatic dibasic acid ester, the adhesiveness was sufficiently maintained at a practical level, and at the same time, the thermal history was high. It can be seen that the drawability was good and the transparency and the like were excellent even after receiving the test (lap No. 1). On the other hand, those containing only ATBC without containing glycerin fatty acid ester and aliphatic dibasic acid ester and those containing a large amount of the aliphatic dibasic acid ester used in combination with glycerin fatty acid ester are not adherent. Although the properties are sufficiently maintained, the drawability of the film subjected to the heat history is poor (Wrap Nos. 3 and 4), and only the glycerin fatty acid ester without the aliphatic dibasic acid ester is contained. In this case, it is found that although the film that has undergone the heat history has good drawability, the adhesiveness does not satisfy a sufficient practical level, and the performance as a wrap film is lost (Lap No. 2).

[0030]

Examples 2 to 10 and Comparative Example 4 The amount of ELO, the amount of DBS, and the amount of A added to vinylidene chloride resin (a vinylidene chloride component is 90% by weight and a vinyl chloride component is 10% by weight).
Lap No. except that the amount of CGL was determined as shown in Table 2. 1
Lap No. 5-14 were obtained. That is, Table 2 shows the effect of the total amount of the glycerin fatty acid ester and the aliphatic dibasic acid ester.

When the total content of the glycerin fatty acid ester and the aliphatic dibasic acid ester in the vinylidene chloride resin composition is in the range of 3 to 10% by weight, the adhesiveness and the pull-out property are sufficiently at practical levels. At the same time, it was found that transparency and the like were also excellent (lap Nos. 5 to 12), and the range was set to 4 to 7% by weight from the viewpoint of highly enhancing each evaluation item. (Lap Nos. 5 to 8, 10, 1)
1). On the other hand, if the total amount of the glycerin fatty acid ester and the aliphatic dibasic acid ester contained in the vinylidene chloride-based resin composition does not satisfy 3% by weight, the adhesion is insufficient, and the cuttability and odor are poor. It is not preferable (Lap No. 13), and when it exceeds 10% by weight, the adhesion is sufficiently maintained at a practical level and the drawability is good, but the transparency is insufficient (Lap No. 13). .14).

[0032]

Examples 11 to 21 and Comparative Examples 5 and 6 The amounts of ELO and DBS added to vinylidene chloride resin (90% by weight of vinylidene chloride component and 10% by weight of vinyl chloride component)
And lap N except that the amounts of ACGL and ACGL were determined as shown in Table 3.
o. The same conditions as in Lap No. 1 were applied. 15-27 were obtained. That is, Table 3 shows the effect of the amount of the aliphatic dibasic acid ester added.

When the aliphatic dibasic acid ester is contained in the vinylidene chloride-based resin composition in the range of 0.05 to 0.5% by weight, the adhesion maintains a practical level and at the same time, It can be seen that the drawability is excellent (lap Nos. 15 to 25), and it is understood that it is preferable to set the range to 0.08 to 0.3% by weight from the viewpoint of enhancing each evaluation item to a high degree. (Lap No. 19-2
1). On the other hand, the amount of the aliphatic dibasic acid ester contained in the vinylidene chloride resin composition was 0.05% by weight.
If the film does not satisfy the condition, the film has good pull-out properties, but the adhesion does not satisfy a sufficient practical level (wrap N
o. 26) When the content exceeds 0.5% by weight, the practical level of adhesiveness is sufficiently maintained, but the drawability of the film is poor (Lap No. 27).

[0034]

Examples 22 to 24 Except that the amounts of DBS, ACGL and ATBC added to vinylidene chloride resin (vinylidene chloride component 90% by weight, vinyl chloride component 10% by weight) were determined as shown in Table 4. Is the lap No. The same conditions as in Lap No. 1 were applied. 28-30 were obtained. It can be seen that even when the plasticizer of the present invention and the conventional plasticizer are used in combination, the adhesion and the pull-out property are sufficiently maintained at practical levels, and the transparency and the cut property are also excellent.

[0035]

[Table 1]

[0036]

[Table 2]

[0037]

[Table 3]

[0038]

[Table 4]

[0039]

According to the present invention, by satisfying the above-mentioned constitution, a film which does not change with time even when it is distributed under high temperature in the summer ensures adequate adhesion, improves drawability, and further improves transparency. It is a vinylidene chloride-based resin wrap film having excellent properties. Therefore, the present invention is extremely significant in practical use.

[Brief description of the drawings]

FIG. 1 is a first experimental diagram illustrating the technical contents (adhesion) of the present invention.

FIG. 2 is a second experimental diagram for explaining the technical contents (pullability) of the present invention.

FIG. 3 is a schematic front view showing a method of measuring the pull-out property.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Free-roll drive part 2 Free-roll fulcrum shaft 3 Paper core 4 Hanger 5 Pull-down movable body 6 Bearing 7 Wrap film

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08L 91/00 C08L 91/00

Claims (3)

[Claims] 1. A vinylidene chloride resin wrap film comprising an epoxidized vegetable oil, (1) at least one glycerin fatty acid ester, and (2) an aliphatic dibasic acid ester, wherein the (1) and the ( The total content of 2) is 3% by weight or more, and the content of (2) is 0.05 to
A vinylidene chloride-based resin wrap film, which is 0.5% by weight. 2. The vinylidene chloride resin wrap film according to claim 1, wherein the glycerin fatty acid ester is acetylated monoglyceride. 3. The vinylidene chloride resin wrap film according to claim 1, wherein the aliphatic dibasic acid ester is dibutyl sebacate.