JP2001055263A - Automatic manju (kind of bun) packaging material and automatic packaging method using the packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new packaging material for Manju (bun with bean-jam filling) and an automatic packaging method which is suitable for a continuous processing for the Manju without applying any manual handling to the warm Manju produced by an automatic manufacturing machine, discharge and yet generating water vapor from it. SOLUTION: This complex sheet 1 comprises hydrophobic resin mono-fiber with an average diameter of mono-fiber being 10 μm or less, a single of melt- blown non-woven fabric 2 with a unit weight of 5 g/m2 or more is arranged or the melt-blown non-woven fabric 2 is arranged at the inner-most layer. In this case, it is possible to attain an automatic packaging material for case with a degree of aeration being 50 cc/cm2/sec to 300 cc/cm2/sec and not cooled down to a room temperature after its manufacturing and generating water vapor. This automatic packaging method is carried out to package the Manju discharged out of the manufacturing device with this single piece of melt-blown non-woven fabric or a complex sheet having the melt-blown non-woven fabric at its innermost layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material that can be used for packaging a still-warm steamed bun immediately after production, and an automatic packaging method using the packaging material.

[0002]

2. Description of the Related Art In the production of buns by an automatic maker, it is necessary to treat buns coming out of a conveyor one after another in a warm state by an automatic packaging machine. However, if the bun in a warm state is wrapped with a conventional packaging material comprising a composite of paper and film, there is a drawback that generated steam is trapped inside and becomes water droplets, which wets the bun and impairs flavor. Therefore, it is inevitable that the packaging process must be led to a stock zone for cooling the buns, cooled, and then taken out and taken out, such as taking out the cooled buns from the stock zone. The fact is that it is necessary to take the trouble of wrapping with hands, and there is also a problem that a stock zone for cooling must be set up.

[0003]

SUMMARY OF THE INVENTION The present invention provides a hot bun produced and discharged by an automatic manufacturing machine without human intervention.
It is an object of the present invention to provide a novel packaging material suitable for continuous processing by an automatic packaging machine, and to provide an automatic packaging method thereof. The inventor of the present invention has diligently studied this problem and has completed the present invention.

[0004]

Means for Solving the Problems The first invention is a single fiber.
The average diameter is made of a hydrophobic resin single fiber of 10 μm or less,
5g / m^TwoThe above melt blown nonwoven fabric alone or
Is a composite sheet in which the melt blown nonwoven fabric is disposed in the innermost layer.
With air permeability of 50cc / cm^Two/ Sec not
300cc / cm^Two/ Sec
Not yet cooled to room temperature after production
It is a packaging material for automatic packaging of buns. Also, the second invention is a manufacturing method.
Water not yet cooled to room temperature after production
Steamed steamed bun, average single fiber diameter is 10μm or less
Consisting of a hydrophobic resin single fiber having a basis weight of 5 g / m^Twothat's all
Has air permeability of 50cc / cm^Two/ Sec to 300cc
/ Cm ^Two/ Sec melt blown nonwoven fabric alone or innermost
With a composite sheet in which the melt blown nonwoven fabric is arranged in a layer
This is an automatic packaging method for buns, characterized by packaging.

[0005] In this specification, "bun" is typically
It refers to buns, both Japanese and Western, and includes its analogues.

[0006] The packaging material for buns of the present invention comprises one or more layers, and a melt-blown nonwoven fabric made of a hydrophobic resin as the innermost layer is disposed on the side in contact with the bun. The hydrophobic melt-blown nonwoven fabric itself does not retain moisture, so that it does not get wet, and its air permeability is in the specific range as described above, so that the steam generated from the hot bun is quickly diffused to the outer layer as it is. There is no disadvantage that the surface of the bun is moistened with moisture to impair the flavor.

As such a hydrophobic resin, polymers such as polyethylene, polypropylene and polyester are suitable.

[0008] The hydrophobic melt-blown nonwoven fabric is a fiber having a diameter as small as a so-called ultrafine fiber having an average fiber diameter of 10 µm or less in terms of the constituent fiber diameter. If properly set, it becomes a nonwoven fabric with high water resistance,
As described above, not only a non-woven fabric having water vapor permeability to the outside of the non-woven fabric, but also a non-woven fabric having a water resistance for preventing liquid permeation from the outside of the non-woven fabric, and this characteristic is
This is extremely preferable as a packaging material for automatically producing and continuously packaging buns.

In the sense of exhibiting the ventilation and water resistance,
That is, the air permeability is 50 cc / cm ² / sec to 300 cc.
/ Cm ² / sec, and the average diameter of the melt-blown nonwoven fabric fibers for making the water resistance 5 cm or more is 10 μm.
m, more preferably 5 μm or less, and the basis weight is 5 g / m ² or more, more preferably 7 to 20 g / m ^2.
Is preferred. If the basis weight is reduced, the air permeability increases but the water resistance decreases. If the basis weight is increased, the water resistance increases but the permeability decreases.

The air permeability as the packaging material for automatic packaging in the present invention is 50 cc / cm ² / s according to JIS L-1096A method.
ec to 300 cc / cm ² / sec. If the air permeability is less than 50 cc / cm ² / sec, when the hot bun is packaged as it is, the steam generated by the bun cannot be diffused sufficiently to the outside, and the bun surface gets wet, resulting in impaired flavor. On the other hand, if the air permeability exceeds 300 cc / cm ² / sec, the steamed bun is abnormally dried, which is not preferable.

The water resistance of the nonwoven fabric is determined according to JIS L-1092.
As measured by Method A, if the packaging material for automatic packaging of the present invention has a water resistance of 5 cm or more, more preferably 10 cm or more, even if water vapor escaping to the outside of the nonwoven fabric condenses, the water droplets remain inside the nonwoven fabric. It is preferable because it can be prevented from entering.

When the strength of the melt blown nonwoven fabric alone is insufficient, the meltblown nonwoven fabric is used as a composite sheet body reinforced with another sheet, for example, a material such as a spunbond nonwoven fabric or tissue paper. These reinforcing materials need to be air-permeable, and are used by placing them on the outer layer that does not directly touch the bun. Needless to say, these reinforcing materials may be those designed with colors and patterns that promote the taste of buns and the like.

As a method of combining these materials with a melt blown nonwoven fabric, that is, laminating and unifying, the whole may be lightly bonded by flat calendering, or partially bonded by a method such as hot embossing or ultrasonic bonding. You may. In order to perform such thermal bonding integration, the other sheet to be composite-integrated with the melt-blown nonwoven fabric should be one in which at least the fiber surface is blended with a heat-adhesive fiber composed of a heat-sealing component. Is preferred. In any case, it is important to prevent excessive adhesion so that the air permeability does not fall below the specified value during the lamination and integration.

As described above, the basis weight of the melt blown nonwoven fabric alone is 7 g / m ² or more, and more preferably 10 to 20 g / m ^2.
g / m ² is preferable, but when this is used as a packaging material composited with another sheet, the total basis weight is preferably 50 g / m ² or less. If the basis weight is more than 50 g / m ² , the entire sheet becomes too thick, which impairs the commercial value of the packed bun. More preferably, it is 40 g / m ² or less.

Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

Example 1 A polypropylene resin was formed into a nonwoven fabric by a melt blown method, and the average fiber diameter was 3 μm.
A sheet having a basis weight of 13 g / m ² was obtained. A polypropylene spunbond having a basis weight of 15 g / m ² was laminated and integrated with the above melt blown nonwoven fabric using a flat calender to form a composite. The air permeability of this sheet was 75 cc / cm ² / sec. Next, the sheet was folded in two in this lamination, and the two sides were sealed in a state where the melt blown nonwoven fabric was arranged inside, thereby forming a bag with one opening. A freshly prepared hot bun was inserted into the bag, and the insertion opening was heat-sealed. The bun which had been left in this state was opened and observed after 20 minutes, and the bun was completely cooled to room temperature, but the surface was not wet or moist and had a good taste.

<< Comparative Example 1 >> An impermeable sheet obtained by laminating a polyethylene film having a thickness of about 10 μm and a polypropylene spunbond having a basis weight of 15 g / m ² with a flat calender was used so that the former film was on the inner surface side. Was made, and a freshly prepared bun was processed and treated in the same manner as in Example 1 and wrapped.
Twenty minutes later, when the bag was opened and observed, dew condensation was observed on the inner surface of the bag, and water droplets due to the dew had soaked on the surface of the bun, the flavor was inferior, and the shape changed due to moisture.

[0018]

According to the bun packaging material of the present invention, a freshly prepared hot bun can be immediately packaged without cooling down to room temperature, so that continuous packaging by automatic packaging is possible and the production efficiency is large. To improve. It also has the advantage that it can be stored without losing the flavor of the bun.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example in which a packaging material for automatic packaging of buns according to the present invention is processed into a bag shape with two sides closed, and the innermost layer of the bag-like packaging material comprising a composite sheet 1 is a melt blown. The nonwoven fabric 2 and the outer layer are the polypropylene spunbond nonwoven fabric 3.

[Explanation of symbols]

 1 Composite sheet 2 Melt blown nonwoven fabric 3 Polypropylene spunbond

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) D04H 1/54 D04H 1/54 Q 3/16 3/16 F term (reference) 3E035 AA06 AA20 BA08 BB02 BC02 BD01 BD03 CA07 3E086 AD01 BA02 BA04 BA15 BA19 BB02 BB47 BB51 CA01 4F100 AK01A AK07A AK07B BA02 BA25 DG03A DG15A DG15B EC03 GB23 JB06A JD02 JJ03 YY00 YY00A 4L047 AA14 AB03 CC05CA08 CB02

Claims (3)

[Claims] 1. A melt-blown non-woven fabric having a single fiber average diameter of 10 μm or less and having a basis weight of 5 g / m ² or more, a melt-blown non-woven fabric alone or a composite sheet in which the melt-blown non-woven fabric is disposed in the innermost layer. Degree is 50cc
/ Cm ² / sec to characterized in that it is a 300cc / cm ² / sec, after production still steam generating automatic packaging packaging material in the middle of the bun not cooled to room temperature. 2. The composite sheet, wherein the innermost melt-blown non-woven fabric is made of a polypropylene resin, the other sheet bonded to the melt-blown non-woven fabric is a polypropylene spun-bonded non-woven fabric, and the two non-woven fabrics are laminated and integrated by heat-sealing means. The packaging material for automatic packaging of steamed steamed buns which have not yet been cooled down to room temperature after production, according to claim 1, characterized in that the steamed buns are not yet cooled to room temperature after production. 3. The steamed steamed bun discharged from the manufacturing apparatus, which has not yet been cooled down to room temperature, is made of a hydrophobic resin single fiber having a single fiber average diameter of 10 μm or less, and has a basis weight of 5 g / m ² or more. Air permeability is 50 cc / cm ² / sec
An automatic packaging method for buns, comprising packaging the melt-blown non-woven fabric alone at a thickness of from 300 cc / cm ² / sec or a composite sheet having the melt-blown non-woven fabric disposed on the innermost layer.