JP2006188246A - Article package, and food package to which article package is pasted - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an article package which can stably be manufactured, is excellent in dimensional stability and appearance, and can be heat-welded to a container with a stable and sufficient sealing strength, and to provide a food package which can stably be manufactured, to the container of which the article package is heat-welded with sufficient sealing strength, and from the container of which the article package can easily be peeled at the time of disposal. <P>SOLUTION: This article package houses an article by heat-welding the peripheral edges 13 and 15 of a first film 14 and a second film 16. In the article package, the first film 14 is made into a multi-layer film having a sealant layer 21 and an outermost layer 22. The second film 16 is formed into a multi-layer film having a sealant layer 23 and an outermost layer 24. The melting point of a resin of the sealant layer 21 is made lower than the melting point of a resin of the outermost layer 22. The melting point of a resin of the sealant layer 23 is made lower than that of a resin of the outermost layer 24. The melting point of the resin of the outermost layer 24 is made lower than that of the resin of the outermost layer 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an article packaging body in which an article such as a straw is packaged, and a food packaging body in which an article packaging body is attached to a container containing food such as a beverage.

  2. Description of the Related Art An article packaging body in which articles such as straws, spoons, forks, and chopsticks are wrapped with a film and the like, and a food packaging body in which an article packaging body is attached to a container that contains food are well known. Examples of the food packaging body include a beverage pack in which a straw packaging body in which straws are packaged in a film is attached to a container containing beverages such as milk and juice.

  A container of a beverage pack is made of a packaging material in which both sides of a paper base are coated with a resin such as polyethylene. Moreover, the straw wrapping body is one in which the straw is wrapped in two films whose peripheral portions are sealed by thermal fusion. The sticking of the straw packaging body to the container is performed by adhesion with a hot melt adhesive, or heat fusion between the surface resin of the container and the film of the straw packaging body.

  The used beverage pack is discarded by peeling the film of the straw package from the container. However, since a film bonded to a container with a hot melt adhesive has a high adhesive force, a considerable force is required when the film is peeled off from the container. Therefore, a beverage pack in which a straw package is adhered to a container with a hot melt adhesive is not preferable in promoting separation and disposal. Further, when the container and the film of the straw package are separated, the hot melt adhesive remains in the container or the film and is discarded without being separated.

A beverage pack in which a straw package is attached to a container by heat fusion is preferable in that the film of the straw package can be easily peeled off from the container, and the container and the film can be separated and discarded. As a film of a straw packaging body, single layer films, such as polyethylene and polypropylene, are well known. However, a single layer film of low density polyethylene has a problem that it is inferior in self-supporting properties and easily curls at the end. In order to solve this, a laminated film for straw packaging is proposed in which the intermediate layer is polyethylene having a density of 0.945 g / cm ³ or more, and both outer layers are 0.925 g / cm ³ or less of polyethylene or ethylene-vinyl acetate copolymer. (See Patent Document 1). This laminated film is said to be excellent in heat fusion to a container and excellent in self-supporting properties.

  However, the conventional single-layer film or laminated film is not only for the heat-sealing surface, when the peripheral edge of the film is heat-sealed to wrap the straw, or when the straw wrapping body is heat-sealed to the container, The surface in contact with the heater on the side opposite to the heat-sealing surface is also melted, the molten resin adheres to the heater, and further, the resin adhering to the heater adheres to another film. If the resin adheres to the heater or the film, the transfer of heat to the heat-sealing surface is hindered, leading to a decrease in the seal strength, and the appearance of the seal portion is also poor.

Therefore, special surface processing such as fluororesin processing is required on the surface of the heater that comes into contact with the film, which makes maintenance difficult and causes a decrease in productivity. Moreover, since the film of a straw packaging body is as thin as about 20 micrometers, it will wrinkle a film by the heat shrink after heat sealing | fusion. Furthermore, in a straw roller in which a straw packaging body having a rectangular shape in front view is connected in the short direction, the pitch between the straw packaging bodies varies due to heat shrinkage, and the straw packaging bodies are separated from the straw roller one by one, In the applicator device for heat-sealing the package, troubles such as the straw package being cut or a mistake in sticking to the container occur, and stable production cannot be performed.
For this reason, the straw packaging body using the film which can suppress the maintenance frequency of a heater was requested | required.

  In Patent Document 2, the upper film is a polyethylene film in which medium density polyethylene and low density polyethylene are mixed, and has a melting point of 125 to 130 ° C. and a crystallization temperature of 100 to 115 ° C., and the lower film has a melting point of 115 to 125 ° C. A straw package that is a low-density polyethylene film having a conversion temperature of 90 to 110 ° C. is disclosed. In this straw package, the melting point of the lower film is made slightly lower than that of the upper film. Therefore, when the straw package is attached to a container, the upper film on which the heater hits is more heat resistant than the lower film. It is said that it is difficult to receive damage such as light, and the temperature setting of the heater can be widened.

However, when wrapping the straw by heat-sealing the peripheral portions of the upper film and the lower film, the heater hits both the upper film and the lower film, so the surface of the heater hitting the lower film Special treatment for preventing adhesion, for example, special surface processing such as fluororesin processing was required.
Japanese Examined Patent Publication No. 3-76832 JP 2004-249999 A

  Therefore, an object of the present invention is an article that can be stably manufactured, has excellent dimensional stability and appearance, does not cause trouble when thermally fused to a container, and can be thermally fused with sufficient sealing strength to the container. Provided are a package and a food package that can be produced stably, the article package is heat-sealed to the container with sufficient sealing strength, and can be easily peeled off from the container when discarded. There is.

The article packaging body of the present invention is an article packaging in which articles are accommodated in a space formed between the first film and the second film by heat-sealing the peripheral portions of the first film and the second film. In the body, the first film is a multilayer film having a sealant layer thermally fused to the second film and an outermost layer on the surface opposite to the sealant layer, and the second film is the first film A multilayer film having a sealant layer thermally bonded to the film and an outermost layer on the surface opposite to the sealant layer, the melting point TmA (° C.) of the resin of the sealant layer of the first film, The melting point TmB (° C.) of the resin of the outermost layer, the melting point TmC (° C.) of the resin of the sealant layer of the second film, and the melting point TmD (° C.) of the resin of the outermost layer of the second film are expressed by the following formula (1) Satisfy the relationship of (3) It is an feature.
TmA <TmB (1)
TmC <TmD (2)
TmD <TmB (3)

The resin of the sealant layer and the resin of the outermost layer are preferably polyethylene resins.
The resin of the sealant layer of the first film and / or the second film is desirably an ethylene-vinyl acetate copolymer.
The resin of the outermost layer of the second film is desirably a mixture of a plurality of polyethylene resins having different densities and / or melting points.
The resin of the sealant layer of the first film is polyethylene having a density of 0.930 g / cm ³ or less, and the resin of the outermost layer of the first film is polyethylene having a density of 0.945 g / cm ³ or more. Yes, the resin of the sealant layer of the second film is polyethylene having a density of 0.925 g / cm ³ or less, and the resin of the outermost layer of the second film is polyethylene having a density of more than 0.925 g / cm ^3. It is desirable that the density of the resin in the outermost layer of the first film is higher than that of the resin in the outermost layer of the second film.

The article is preferably a straw.
The food packaging body of the present invention has a container containing food and the article packaging body of the present invention attached to the container, and the outermost layer of the second film of the article packaging body and the surface of the container are It is heat-sealed.

The article package of the present invention can be stably produced, has excellent dimensional stability and appearance, does not cause trouble when thermally fused to the container, and can be thermally fused to the container with sufficient sealing strength.
In addition, the food packaging body of the present invention can be produced stably, the article packaging body is heat-sealed to the container with sufficient sealing strength, and the article packaging body can be easily peeled from the container when discarded.

<Package for goods>
The article packaging body of the present invention includes an article, a first film on which a bulging portion for accommodating the article is formed, and a second film, and the peripheral portions of the first film and the second film. The article is stored in a space formed between the first film and the second film by heat-sealing.
Examples of articles include sticks such as straws, spoons, forks, and chopsticks; toys, confectionery, and medicines.
Hereinafter, as an example of the article packaging body, a straw packaging body in which the article is a straw will be described.

(Straw package)
1-3 is a figure which shows an example of the straw packaging body which is the goods packaging body of this invention. The straw wrapping body 10 includes a straw 11 (article), a vertically long bulging portion 12 that accommodates the straw 11, a first film 14 having a flat peripheral edge portion 13, and a second flat portion that is generally flat. The peripheral portion 13 of the first film 14 and the peripheral portion 15 of the second film 16 are heat-sealed to form the bulging portion 12 of the first film 14 and the second film 16. The straw 11 is accommodated in a space 17 formed between the two.

  The first film 14 is preferably transparent enough to allow the straw 11 to be seen through. 10-40 micrometers is preferable and, as for the thickness of the 1st film 14 and the 2nd film 16, 20-30 micrometers is more preferable.

FIG. 4 is an enlarged cross-sectional view of a portion where the peripheral edge portion 13 of the first film 14 and the peripheral edge portion 15 of the second film 16 are heat-sealed.
The first film 14 is a multilayer film having a sealant layer 21 that is thermally fused to the second film 16 and an outermost layer 22 on the surface opposite to the sealant layer 21. The outermost layer 22 is a surface in contact with the heater surface when the first film 14 and the second film 16 are heat-sealed and when the straw package 10 and the container are heat-sealed.
The second film 16 is a multilayer film having a sealant layer 23 that is heat-sealed with the first film 14 and an outermost layer 24 on the surface opposite to the sealant layer 23. The outermost layer 24 becomes a surface in contact with the heater surface when the first film 14 and the second film 16 are heat-sealed, and becomes a sealant layer when the straw package 10 and the container are heat-sealed.

The sealant layer 21 of the first film 14, the outermost layer 22 of the first film 14, the sealant layer 23 of the second film 16, and the outermost layer 24 of the second film 16 have a melting point of the resin of the sealant layer 21. When TmA (° C.), the melting point of the resin of the outermost layer 22 is TmB (° C.), the melting point of the resin of the sealant layer 23 is TmC (° C.), and the melting point of the resin of the outermost layer 24 is TmD (° C.) The relations 1) to (3) are satisfied.
TmA <TmB (1)
TmC <TmD (2)
TmD <TmB (3)

  The difference in melting points in the formulas (1) to (3) is preferably 5 ° C. or more, and more preferably 10 ° C. or more. The “melting point” in the present invention is a value measured using a differential scanning calorimeter (DSC) according to JIS K7121.

  It is preferable that the resin of the sealant layer 21, the resin of the outermost layer 22, the resin of the sealant layer 23, and the resin of the outermost layer 24 have transparency that allows the straw 11 to be seen through. Examples of the resin include polyethylene resins such as polyethylene, ethylene-vinyl acetate copolymer, and ethylene- (meth) acrylate copolymer; polypropylene resins such as homopolypropylene, random polypropylene, and block polypropylene; polyethylene terephthalate, polybutylene terephthalate And polyester resins such as polytrimethylene terephthalate; polyamide resins such as polyamide 66 and polyamide 6; and mixtures of these resins. Of these, polyethylene resins are preferred because of their excellent low-temperature heat-fusibility. Of the polyethylene resins, polyethylene or ethylene-vinyl acetate copolymer is preferable, and ethylene-vinyl acetate copolymer is preferable for a layer that requires sufficient low-temperature heat-fusibility.

Examples of the polyethylene include high pressure method low density polyethylene, linear low density polyethylene, medium density polyethylene, and high density polyethylene.
The melt flow rate of the polyethylene and the ethylene-vinyl acetate copolymer is preferably 0.1 g / 10 min to 20 g / 10 min. The melt flow rate is determined in accordance with JIS K 7210 at 190 ° C. and a load of 21.18N. Moreover, 1-30 mass% is preferable, as for content of the vinyl acetate unit in an ethylene-vinyl acetate copolymer, 2-20 mass% is more preferable, and 4-10 mass% is especially preferable.

Since the sealant layer 21 and the sealant layer 23 serve as a sealant layer at the time of heat fusion, the resin of the sealant layer 21 and the resin of the sealant layer 23 are preferably the same type of resin from the viewpoint of seal strength. In addition, since the heat-sealing time at the time of manufacturing the straw package 10 is extremely short, the resin of the sealant layer 21 and / or the resin of the sealant layer 23 is an ethylene acetate-vinyl copolymer having high low-temperature heat-fusibility. Polymers are preferred.
The resin of the outermost layer 22 is a resin having the highest melting point TmB. Therefore, when all the films of the straw packaging body are manufactured from a polyethylene resin, the resin of the outermost layer 22 is preferably high density polyethylene ethylene having a density of 0.945 g / cm ³ or more.

  The resin of the outermost layer 24 of the second film 16 is preferably a polyethylene resin, and more preferably polyethylene, because it can be easily heat-sealed with polyethylene on the surface of the container. Moreover, it is preferable that the resin of the outermost layer 24 is a mixture of a plurality of polyethylene resins having different densities and / or melting points to enhance the low-temperature heat-fusibility. The melting point of a mixture of a plurality of resins is a weighted average. For example, the melting point of a mixture of 80% by mass of polyethylene having a melting point of 135 ° C. and 20% by mass of polyethylene having a melting point of 100 ° C. is 135 × 0.8 + 100 × 0.2 = 128 ° C.

By using polyethylene as the resin, the first film 14 and the second film 16 can be recovered, melted and regenerated, and reused as a raw material resin. In this case, the resin of the sealant layer 21 is a polyethylene having a density of 0.930 g / cm ³ or less, the resin of the outermost layer 22 is a polyethylene having a density of 0.945 g / cm ³ or more, and the resin of the sealant layer 23 is The density of the polyethylene is 0.925 g / cm ³ or less, the resin of the outermost layer 24 is a polyethylene having a density exceeding 0.925 g / cm ³ , and the density of the resin of the outermost layer 22 is higher than that of the resin of the outermost layer 24. It is preferable in terms of facilitating reuse as a raw material resin in the manufacturing process of the straw package. The density of polyethylene is a value described in the catalog of the manufacturer of the raw resin used for each layer, such as a value measured according to the density gradient tube method of JIS K 7112 D method.

(Manufacturing method of straw package)
Below, the manufacturing method of the straw packaging body 10 is demonstrated.
FIG. 5 is a diagram illustrating an example of a manufacturing apparatus for the straw package 10. This manufacturing apparatus is a rotatable main drum having a hopper 31 in which a straw 11 is stored, a plurality of grooves 32 in which the straw 11 supplied from the hopper 31 is held, and suction holes 33 provided in the grooves 32. 34, a push roll 36 having a plurality of ridges 35 for pushing the first film 14 into the groove 32 of the main drum 34, and the first film 14 and the second film overlapping the surface of the main drum 34 other than the groove 32. A first heating roll 37 for thermally fusing the film 16, a second heating roll 38 for thermally fusing both edges of the first film 14 and the second film 16, and the first film 14 and the second film. A stroller in which a cutter (not shown) for cutting excess portions of both edges of 16 and a straw packaging body 10 having a rectangular shape in front view are connected in a short direction. And and a winder 39 for winding the 0 are those schematic configuration.

Manufacture of the straw packaging body 10 using this manufacturing apparatus is performed as follows.
At the same time as the first film 14 supplied from a first film roll (not shown) is pushed into the groove 32 on the outer periphery of the main drum 34 by the protrusion 35 of the push roll 36 that rotates in synchronization with the main drum 34. The suction holes 33 provided in the grooves 32 are sucked and brought into close contact with the grooves 32 of the main drum 34. In this way, the bulging portion 12 of the first film 14 is formed.

  Next, the straw 11 is supplied from the hopper 31 onto the first film 14 brought into close contact with the groove 32. Next, a second film supplied from a second film roll (not shown) is supplied onto the main drum 34 so as to cover the straw 11. The first film 14 and the second film 16 that are overlapped on the surface of the main drum 34 except for the grooves 32 are heat-sealed by the first heating roll 37.

  The first film 14 and the second film 16 that are heat-sealed with the straw 11 sandwiched between them are separated from the main drum 34, and then both ends of the first film 14 and the second film 16 are heat-sealed by the second heating roll 38, and a cutter (not shown) Omitted) cuts excess portions on both sides of the first film 14 and the second film 16. The stroller 20 in which the straw packaging body 10 obtained in this way is connected in the short direction is wound up by the winder 39.

(Function)
In the straw packaging body 10 described above, the melting point TmA of the resin of the sealant layer 21 and the melting point TmB of the resin of the outermost layer 22 satisfy the above formula (1), whereby the outermost layer 22 of the first film 14 is satisfied. Is a heat-resistant layer having a heat resistance higher than that of the sealant layer 21, and the sealant layer 21 is a layer that melts at a lower temperature than the heat-resistant layer. Further, when the melting point TmC of the resin of the sealant layer 23 and the melting point TmD of the resin of the outermost layer 24 satisfy the above formula (2), the outermost layer 24 in the second film 16 is more heat resistant than the sealant layer 23. The sealant layer 23 is a layer that melts at a lower temperature than the heat resistant layer. Further, when the melting point TmB of the resin of the outermost layer 22 and the melting point TmD of the resin of the outermost layer 24 satisfy the above formula (3), the outermost layer 22 in the straw package 10 has heat resistance more than the outermost layer 24. The outermost layer 24 is a sealant layer that melts at a lower temperature than the outermost layer 22.

  Thus, by selecting the resin of each layer of the sealant layer 21, the outermost layer 22, the sealant layer 23, and the outermost layer 24 so as to satisfy the formulas (1) to (3), the first film 14 and the second film When the film 16 is heat-sealed, the heat-resistant layers (outermost layer 22 and outermost layer 24) are always in contact with the heater surface. Even if the heater temperature is lower than the melting point of the heat-resistant layer, the sealant layer 21 and The sealant layer 23 melts. Further, when the straw package 10 and the container are heat-sealed, the heat-resistant layer (outermost layer 22) is always in contact with the surface of the heater, and even if the heater temperature is lower than the melting point of the heat-resistant layer, the sealant layer ( The outermost layer 24) melts. That is, even if excessive heat is not applied at the time of heat fusion, the sealant layer melts, so that the resin of the heat-resistant layer does not adhere to the heater, and as a result, heat transfer to the heat fusion surface may be hindered. The seal strength does not decrease, and the appearance of the seal portion is also improved. Moreover, the film damage by heat | fever is suppressed by making temperature of a heater lower than melting | fusing point of a heat-resistant layer. In addition, the thermal shrinkage after heat fusion is reduced, and the dimensional change of the stroller is suppressed. As a result, no trouble occurs when the straw package 10 is stuck to the container. Therefore, heat fusion can be performed stably at high speed and continuously, and the straw package 10 and the food package can be stably manufactured.

Further, the outermost layer 22 and the outermost layer 24 having a relatively high melting point give the straw wrapping body 10 the first film 14 and the second film 16 so that the dimensional stability and the cutting suitability are improved.
In addition, since the straw package 10 can be attached to the container by thermal fusion, the straw package 10 can be easily peeled off from the container as compared with adhesion by a hot melt adhesive.

  In the illustrated example, the first film 14 and the second film 16 are examples of a two-layer film, but the sealant layer, the outermost layer, the sealant layer, and the first film and the second film, As long as the melting points of the resins of the outermost layers satisfy the formulas (1) to (3) and the effects of the present invention are not lost, the first film and the second film may be different between the sealant layer and the outermost layer. You may use the film of 3 or more layers which provided the layer of. Further, the article packaging body of the present invention includes those in which a plurality of article packaging bodies are connected like the stroller 20 in which the straw packaging bodies 10 in the illustrated example are connected in the short direction. In addition, for the attachment to the container, a method using a hot melt adhesive or double-sided tape other than heat fusion can be used as a matter of course.

<Food packaging>
The food packaging body of the present invention has a container containing food and the article packaging body of the present invention attached to the container, and the outermost layer of the second film of the article packaging body and the surface of the container are It is heat-sealed.
Examples of food include beverages such as milk, juice, and soy milk.
Examples of the container include a gable top type container having an inclined top portion, a brick type container having a flat top portion, a cup type container, and a cart can (registered trademark) which is a cylindrical paper container.
Hereinafter, as an example of a food package, a beverage pack in which the straw package 10 is attached to a brick container containing a beverage will be described.

(Beverage pack)
FIG. 6 is a diagram showing an example of a beverage pack that is a food package of the present invention. The beverage pack 40 includes a brick-type container 41 that contains a beverage, and a straw package 10 that is attached to a side surface of the container 41. The outermost layer 24 of the second film of the straw package 10, The side surface of the container 41 is heat-sealed.
The container 41 is preferably a substrate whose surface is coated with a resin. As the resin, a polyethylene resin is preferable and polyethylene is more preferable because it is excellent in low-temperature heat-fusibility. In addition, as long as it is a container which consists of a base material which can be heat-sealed even if it is not resin-coated, it is not necessary to provide resin coating.

In this beverage pack 40, the sealant layer (outermost layer 24) is ahead of the heat-resistant layer (outermost layer 22) without applying excessive heat when the straw package 10 and the container 41 are heat-sealed. Therefore, the resin of the heat-resistant layer (outermost layer 22) does not adhere to the heater. As a result, the transfer of heat to the heat-sealing surface is not hindered, and the sealing strength does not decrease. Therefore, heat fusion can be performed stably at high speed and continuously, and the beverage pack 40 can be manufactured stably.
In addition, since the beverage pack 40 is attached to the container 41 of the straw package 10 by heat fusion, the straw package 10 can be easily peeled off from the container 41 as compared with adhesion by a hot melt adhesive. As a result, it is excellent in waste disposal.

[Example 1]
Low density polyethylene (density 0.918 g / cm ³ , melt flow rate 2 g / 10 min, melting point 108 ° C.) is used as the sealant layer resin, and high density polyethylene (density 0.960 g / cm ³ ) is used as the outermost layer resin. And a melt flow rate of 3 g / 10 min, a melting point of 135 ° C.), these were formed by an inflation film molding machine having a die diameter of 100 mmφ under conditions of a die temperature of 190 ° C. and a blow ratio of 2.0, and a thickness of 30 μm. A first film was obtained.
Further, low density polyethylene (density 0.918 g / cm ³ , melt flow rate 2 g / 10 min, melting point 108 ° C.) is used as the resin for the sealant layer, and medium density polyethylene (density 0.928 g / cm 2) is used as the outermost layer resin. cm ^3, a melt flow rate 2 g / 10 min, with melting point 123 ° C.), these, by an inflation film molding machine die diameter 100 mm, die temperature 190 ° C., a film was formed by a condition of a blow ratio of 2.0, a thickness A second film of 25 μm was obtained.

The obtained first film, the second film, and a two-stage straw having a diameter of 6 mm and a length of 88 mm when contracted are supplied to the manufacturing apparatus shown in FIG. Manufactured. The temperature of the 1st heating roll was set to 130 degreeC, and the temperature of the 2nd heating roll was set to 125 degreeC.
Using an applicator device, the straw packaging body is separated from the straw roller one by one to obtain a straw packaging body having a width of 15 mm, a length of 101 mm, and a height of the bulging portion of about 6 mm, and the outermost layer of the second film of the straw packaging body. A beverage pack was obtained by heat-sealing to the side of the container containing the beverage. The temperature of the heater in the applicator device was set to 120 ° C. As the container, a paper substrate whose outer surface was coated with polyethylene was used.

[Example 2]
As the resin of the outermost layer of the second film, high-density polyethylene (density 0.960 g / cm ³ , melt flow rate 3 g / 10 minutes, melting point 135 ° C.) 80% by mass and low-density polyethylene (density 0.910 g / cm ³ ; Example 1 except that a mixture (melting point 128 ° C., mixture density 0.950 g / cm ³ (calculated value)) with 20% by mass of melt flow rate 2 g / 10 min, melting point 100 ° C. was used. In the same manner as above, a straw package and a beverage pack were obtained.

[Comparative Example 1]
Example 1 was the same as Example 1 except that the first film and the second film were single-layer films made of high-density polyethylene (density 0.960 g / cm ³ , melt flow rate 3 g / 10 min, melting point 135 ° C.). Thus, a straw package and a beverage pack were obtained.

  In Examples 1 and 2, when producing the straw packaging body, the shrinkage of the first film and the second film is small, the straw packaging pitch in the stroller is small, and the resin is welded to the heating roll. There was no stable heat fusion. Even when the straw package is heat-sealed to the container, since there is little deviation in the straw packaging pitch in the stroller, it can be stably supplied to the cutting drum of the applicator device, and the straw package is heat-fused to the container. I was able to wear it stably. It was also easy to peel the straw package from the container.

  In Comparative Example 1, when manufacturing the straw packaging body, the film melts, the heat-sealing surface becomes rough, the appearance of the straw packaging body deteriorates, and the adhesion of the resin to the heating roll occurs and is stable. The straw package could not be manufactured. In addition, troubles such as breakage of the stroller occurred during the heat fusion of the straw package to the container.

  The article packaging body of the present invention is excellent in dimensional stability and appearance, does not cause any trouble when affixed to a container, and can be heat-sealed with a sufficient sealing strength to the container, and thus is suitable for application to a container. It is.

It is a front view which shows an example of the goods packaging body of this invention. It is a longitudinal cross-sectional view which shows an example of the goods packaging body of this invention. It is a cross-sectional view showing an example of the article packaging body of the present invention. It is an expanded sectional view of the peripheral part in FIG. It is a schematic block diagram which shows an example of the manufacturing apparatus of an article packaging body. It is a front view which shows an example of the food packaging body of this invention.

Explanation of symbols

10 Straw packaging (packaging of goods)
11 Straw (goods)
13 peripheral part 14 1st film 15 peripheral part 16 2nd film 17 space 21 sealant layer 22 outermost layer 23 sealant layer 24 outermost layer 40 beverage pack (food packaging)
41 containers

Claims (7)

In the article packaging body in which the peripheral portions of the first film and the second film are heat-sealed and the article is accommodated in a space formed between the first film and the second film,
The first film is a multilayer film having a sealant layer thermally fused with the second film and an outermost layer on the surface opposite to the sealant layer;
The second film is a multilayer film having a sealant layer thermally fused to the first film and an outermost layer on the surface opposite to the sealant layer;
The first film sealant layer resin melting point TmA (° C), the first film outermost layer resin melting point TmB (° C), the second film sealant layer resin melting point TmC (° C), and the first film sealant layer resin melting point TmC (° C) The article packaging body, wherein the melting point TmD (° C.) of the outermost resin of the film 2 satisfies the relationships of the following formulas (1) to (3).
TmA <TmB (1)
TmC <TmD (2)
TmD <TmB (3)   The article packaging body according to claim 1, wherein the resin of the sealant layer and the resin of the outermost layer are polyethylene resins.   The article packaging body according to claim 1 or 2, wherein the resin of the sealant layer of the first film and / or the second film is an ethylene-vinyl acetate copolymer.   The article packaging body according to any one of claims 1 to 3, wherein the resin of the outermost layer of the second film is a mixture of a plurality of polyethylene resins having different densities and / or melting points. The resin of the sealant layer of the first film is polyethylene having a density of 0.930 g / cm ³ or less,
The resin of the outermost layer of the first film is polyethylene having a density of 0.945 g / cm ³ or more,
The resin of the sealant layer of the second film is polyethylene having a density of 0.925 g / cm ³ or less,
The resin of the outermost layer of the second film is polyethylene having a density exceeding 0.925 g / cm ³ ,
The article packaging body according to claim 1, wherein the density of the outermost resin layer of the first film is higher than that of the outermost resin layer of the second film.   The article packaging body according to any one of claims 1 to 5, wherein the article is a straw. A container containing food and the article packaging according to any one of claims 1 to 6 attached to the container;
A food packaging body, wherein the outermost layer of the second film of the article packaging body and the surface of the container are heat-sealed.

Images