JP2005067635A - Bag for steam cooking - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag for steam cooking, in which a content is stored and kept under cryopreservation and can be cooked in a steamer directly when needed, after which steam does not condense on the inner surface of the bag when the content is left as it is so that the content does not get sodden or sticky, and the content can be checked from the outside. <P>SOLUTION: The bag is composed of a plastic film, in which 100,000 to 500,000 pores having diameters of 0.1 to 0.6 mm are formed per 1 m<SP>2</SP>, and a gas permeable base material, and the periphery of the bag is glued together via a heat adhesive part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a steaming cooking bag that can store contents and store them in a frozen state and put them in a steamer when they are used for cooking.

Conventionally, as a bag that can be heated in a microwave oven or cooked, an electronic material in which one sheet made of only a nonwoven fabric is folded, or two sheets are stacked and heat-sealed on at least one of the four sides. Food packaging bag for range heating (for example, see Patent Document 1), a bag having a bottom made of a plastic film, a plastic film having no holes on one side, and a perforated plastic film having holes formed on the other side except for the vicinity of the bottom For example, a packaging bag for food heated by a microwave oven (see, for example, Patent Document 2) is known.
Japanese Utility Model Publication No. 5-82873 ACT 7-22985

  However, since the former food packaging bag for microwave heating is composed only of non-woven fabric, it has the disadvantages that the contents stored inside cannot be seen and the bag is difficult to tear and open. The packaging bag for food heated by microwave oven is composed of a perforated plastic film with a bottom surface made of a plastic film and a top surface formed with a hole. It has the disadvantages that the product becomes sticky and the bag is torn and difficult to open.

  The purpose of the present invention is to store the contents and store them in a frozen state, and when they are used, they can be cooked in a steamer as they are. To provide a steaming cooking bag in which moisture can hardly be condensed on the inner surface of the bag and the packed contents can be visually recognized even when condensation occurs, and the contents are not sticky due to moisture. It is in.

  It is a steaming cooking bag having a configuration in which the upper surface is made of a plastic film having a plurality of pores, the lower surface is made of a breathable base material, and the periphery is bonded by a heat bonding portion.

  In the steam cooking bag, the pore diameter is 0.1 to 0.6 mm, and the pores are formed at a rate of 100,000 to 500,000 per square meter.

  The said plastic film of said steaming cooking bag is a structure which consists of a laminated body of a biaxially stretched film and a thermoadhesive resin layer.

  The said breathable base material of said steaming cooking bag is a structure which consists of a nonwoven fabric and paper.

  The steaming cooking bag of the present invention has a configuration in which the upper surface of the bag is made of a plastic film having a plurality of pores and the lower surface is made of a breathable base material. After storing it in a steamer when it is needed, store it in a frozen state and store it in a steamer when necessary. Even when the bag is left as it is, water vapor does not condense on the inner surface of the bag, so that the content can be prevented from getting wet and sticky due to the condensed water droplets. Further, since the bag can be easily torn and opened from anywhere without using a notch or the like in the bag, the contents can be easily taken out, and the stored contents can be visually confirmed, which is very convenient.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view taken along the line I-I of FIG. Each represents a hole.

  The embodiment of the steaming cooking bag according to the present invention has a plan view as shown in FIG. 1 and a cross-sectional view as shown in FIG. It is a quadrangular bag made of a conductive base material 2 and having a peripheral edge bonded by a heat bonding part 3.

  The pores 4 formed in the plastic film 1 of the steam cooking bag of the embodiment have a pore diameter of 0.1 to 0.6 mm, and the pores 4 are 100,000 to 500,000 per square meter. The plastic film 1 is formed at a ratio. Improve air permeability and vapor permeability of plastic film by forming pores with a pore diameter of 0.1-0.6mm in plastic film 1 at a rate of 100,000-500,000 per square meter. Even if it is cooked and left as it is, it is possible to prevent water vapor from condensing and forming water droplets inside the bag, so that the content can be prevented from sticking or swelling due to the condensed water droplets. it can. Even if the strength of the plastic film is strong, it can be easily torn from any part of the bag without notching the bag.

  The method for forming the pores 4 in the plastic film 1 is not particularly limited, but it is fine using a processing machine having a hot needle perforated part using induction heat generation with high temperature uniformity as a heat source and a cooling mechanism for solidifying the molten resin. The holes 4 are preferably formed. In the case of the hot needle punching method, it is easy to adjust the hole diameter and change the density of the holes to be formed and obtain a stable hole.

  As the plastic film 1, any heat-adhesive film having excellent heat resistance can be used. However, it is preferable to use a film in which a biaxially stretched film and a heat-adhesive resin layer are laminated. Since the biaxially stretched film is excellent in heat resistance, the heat bonding process between the plastic film 1 and the breathable substrate 2 becomes easy. As the biaxially stretched film, biaxially stretched polyethylene terephthalate (PET), biaxially stretched polypropylene (OPP), or the like can be used. As the thermal adhesive resin, unstretched polypropylene (CPP), low density polyethylene (LDPE), medium density polyethylene (MDPE), or the like can be used. Lamination of the biaxially stretched film and the heat-adhesive resin layer is performed by dry lamination (DL), or is laminated by extrusion lamination (EC) of the heat-adhesive resin on the surface of the biaxially stretched film. As a structure of the plastic film 1, for example, a thermal adhesive resin coat OPP, OPP / DL / CPP, PET / DL / CPP, OPP / DL / LDPE, PET / DL / LDPE, OPP / DL / MDPE, PET / DL / MDPE, OPP / EC-PP, PET / EC-PP, OPP / EC-PE, PET / EC-PE, and the like.

As the breathable substrate 2, a nonwoven fabric, paper, synthetic fiber mixed paper, or the like is used. Although there is no restriction | limiting in particular as basic weight of a breathable base material, About 30-50 g / m < ² > is preferable when bag-making aptitude, ease of handling, cost, etc. are considered. The nonwoven fabric used as the breathable base material is preferably one that has excellent breathability and is easy to tear, and is preferably a nonwoven fabric made of pulp fiber, regenerated cellulose fiber, polyethylene fiber, polypropylene fiber, polyester fiber, etc. and manufactured by a wet method. Can be used for In addition, in the case of a nonwoven fabric containing polyethylene fiber and polypropylene fiber, it can be a nonwoven fabric having thermal adhesiveness, so that the thermal adhesiveness with the thermal adhesive resin layer constituting the plastic film is improved, and the plastic film and The thermal adhesive strength of is increased, which is more preferable.

  The paper used as the breathable base material is 100% bleached chemical pulp such as pure white roll paper, bleached kraft paper, and imitation paper, or thermal bonding of bleached chemical pulp to polyethylene fiber, polypropylene fiber, polyester fiber, etc. Synthetic fiber mixed paper and the like which are mixed with the synthetic fiber can be used. The heat-adhesive resin layer and the paper constituting the plastic film can be heat-bonded. However, by using a mixed paper obtained by mixing the heat-adhesive synthetic fibers, the heat-adhesion with the plastic film can be improved.

  In the case of the steaming cooking bag of the embodiment, with the contents such as the buns stored inside the bag, steaming with a steamer has good steam permeability and excellent steaming effect, and left after steaming cooking At this time, it is possible to prevent water vapor from condensing and forming water droplets inside the bag, so that it is possible to prevent the content from sticking due to the dewed water and preventing the content from being absorbed and swollen. Moreover, since the contents stored in the bag can be visually recognized, it is convenient for use.

  The steaming cooking bag of the present invention wraps the buns, pork buns, meat buns, etc. for business use individually, puts them in a large bag, puts them in a cardboard box, etc., freezes them, and wraps them in a steaming cooking bag when necessary It is especially useful for applications where steamed buns, pork buns, meat buns, etc. are put into a steamer and steamed, but the use is not particularly limited and can be used for packaging the contents to be eaten after steaming is there. This steaming cooking bag is used without printing a pattern or the like.

The top view which shows embodiment of this invention. FIG. 2 is an enlarged sectional view taken along line II in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plastic film 2 Breathable base material 3 Thermal bonding part 4 Pore

Claims (4)

A steam cooking bag, characterized in that the upper surface is made of a plastic film having a plurality of pores, the lower surface is made of a breathable base material, and the periphery is bonded by a heat bonding part. The pore diameter of the pores is 0.1 to 0.6 mm, and the pores are formed at a rate of 100,000 to 500,000 per square meter. Steamed cooking bag. The steaming cooking bag according to claim 1 or 2, wherein the plastic film is a laminate of a biaxially stretched film and a heat-adhesive resin layer. The steamable cooking bag according to any one of claims 1 to 3, wherein the breathable base material is made of a nonwoven fabric or paper.

Images