JPH0427084B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method of applying anti-fog treatment to the inner surface of a lid material in a filling packaging method for packaging foods and the like.

(Prior Art) Conventionally, there is a filling and packaging method in which a molded tray is filled with food, etc., a long lid is placed over the molded tray, and the tray is sealed with a seal around the periphery of the tray. For example, if the contents are raw meat, a package packaged using this method will prevent the inner surface of the lid material from becoming cloudy due to condensation of moisture contained in the raw meat, which will damage the appearance of the product, when displayed and sold in a refrigerated case. In order to do this, a film in which an anti-fog treatment agent such as a surfactant was mixed was laminated on the inner surface of the lid material. (Unexamined Japanese Patent Publication No. 59-74008) (Problems to be solved by the invention) The kneaded film used in this case is generally a stretch film made of polyethylene, polyvinyl chloride, etc., but it is not possible to use this by laminating them. However, the disadvantage is that the cost is quite high. One possible way to solve this problem is to use a lid material in which a treatment agent such as an anti-fog agent is directly applied to the inner surface of the lid material, without laminating the film as described above.
There was a problem in that when the treatment agent was applied to the sealing portion of the lid material, a sealing failure occurred.

Therefore, as a result of intensive research to solve this problem, the present invention has been arrived at.

(Means for Solving the Problems) That is, the present invention fills a pre-formed tray with food, etc., sequentially transports the tray, and unwinds the rolled lid material while feeding it onto the tray. In the filling packaging method, in which a lidding material is stacked on a tray and sealed at the periphery of the tray, during the process from unrolling the lidding material to stacking it on the tray,
This filling and packaging method is characterized in that a treatment agent such as an antifogging agent is applied to the inner surface of the lid material except for the sealing surface.

The present invention will be explained in detail below.

The tray used in the present invention is formed from a plastic sheet made of polyvinyl chloride, polypropylene, or the like by vacuum forming, pressure forming, or the like.

Further, as the lid material, polyethylene terephthalate, polyvinyl chloride, polypropylene, etc., or a polyolefin layer laminated thereon can be used.

As the processing agent in the present invention, any processing agent that can be coated, such as an antifogging agent or an antistatic agent, can be suitably used.

A more detailed explanation will be given below based on the accompanying drawings.

FIG. 1 is a schematic side view showing an example of an apparatus for implementing the filling and packaging method of the present invention, FIG. 2 is a schematic side view showing an enlarged portion of FIG. 1, and FIG. FIG. 3 is a plan view showing an example of the lid material.

As shown in FIG. 1, a tray 1 that has been formed in advance and filled with contents is conveyed to a conveyor 2 for conveying the tray.
The waste is transferred to the waste replacement seal chamber 3.

On the other hand, the rolled lid material 4 is unwound by a drive roll 5 and a nip roll 51, is supplied via a dancing roll 52 and a guide roll 53, and is superimposed on the tray 1 by a chucking device to the gas displacement seal chamber 3. be transported. During this time, the lid material 4 passes through a coating device 6, and as shown in FIG. 3, a treatment agent 61 such as an antifogging agent is applied to the inner surface of the lid material except for the sealing surface 41.

After that, the stacked tray 1 and lid material 4 are gas-exchanged in the gas-exchange seal chamber 3, and the tray 1
Heat sealed around the periphery. At this time, no processing agent is attached to the sealing surface, and the tray is immediately overlapped with the sealing surface, so that sealing can be performed without any problem. Further, the sealed tray 1 and lid material 4 are then trimmed into a final shape by a Thomson cutter 7 and delivered to a carry-out table 8. The scrap film 42 after being cut is wound onto a scrap spool 43. In this case, if the treatment agent is applied to the lid material according to the outline, the pitch alignment becomes complicated, but since it is only necessary to synchronize the application device 6 with the movement of the gas displacement seal chamber 3, it is accurate and easy. can be applied and sealed in place.

For example, as shown in FIG. 2, the coating device 6 includes a processing agent container 62, a coating section 63, and a Tatsuchiroll 64. The material is supplied with the inner surface facing the coating device. Next, the lid material is attached to the gas displacement seal chamber 3 inside the packaging machine.
When conveyed to the painting section 6 by the drive device 65,
3 is pressed against the lid material 4 for a certain period of time, and intermittently, as shown by the solid line, or released as shown by the dotted line.
This pressing movement may be performed by the coating section 63 itself, or by pressing the touch roll 64 against the coating section 63.

The coating range (area) can be controlled by the following method. In other words, the width direction of the lid material 4 is the coating portion 6.
3, and the flow direction is set by pressing for a pressing time calculated from the speed at which the lid material 4 is conveyed. Further, there is no particular restriction on the driving device 65 that causes the pressing movement, and any device such as a motor or an air cylinder can be used.

(Examples) The present invention will be explained in more detail below based on Examples.

An antifogging agent application device 6 as shown in FIG. 2 was attached to a raw meat gas displacement filling and packaging machine as shown in FIG. 1.

Tray: PVC white sheet (thickness 0.25
19cm wide and 12cm long.
cm, 2.7cm deep.

Lid material: PVC transparent sheet, 0.1mm thick.
The one with a width of 24.4cm.

was used.

The coating device 6 was a stainless steel container with an internal volume of about 500 ml, and a coating section 63 made of felt (about 2 mm thick) for impregnating the aqueous solution of the antifogging treatment agent was attached thereto, and the coating width was 18 cm.

The antifogging agent was a commercially available product whose main component was sucrose fatty acid ester, Rikemar A manufactured by Riken Vitamin Oil Co., Ltd., and was made into a 1.5% aqueous solution.

In this packaging machine, the conveyance speed of the lid material is 13.8 cm/sec, so when the coating length in the machine direction is set to 11 cm, the contact time of the coating part 63 to the lid material is 0.8 cm.
Since the contact time was 0.8 seconds, the contact was adjusted for 0.8 seconds when transporting the lid material.

Under these conditions, place the beef (usugiri) on the tray, about
When 150 g of the product was introduced into the packaging machine and packaged, it was possible to uniformly coat the lid material except for the sealing surface area 41, as shown in Figure 3.
It was possible to seal reliably, and the inner surface of the lid material did not become cloudy even when placed in the refrigerator, and the product value was satisfactory.

(Effects of the Invention) The filling and packaging method of the present invention applies a treatment agent such as an anti-fogging agent to the inner surface of the lid material except for the inner surface of the seal during the process from unwinding the lid material to stacking it on the tray. Therefore, it is possible to perform inexpensive treatment on the inner surface of the lid material, and it is possible to perform filling and packaging without adversely affecting the sealing performance, and the pitching of the application area and the sealing area can be performed extremely accurately and easily. It has the excellent effect of being able to

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an example of an apparatus for implementing the filling and packaging method of the present invention, FIG. 2 is a schematic side view showing an enlarged portion of FIG. 1, and FIG. FIG. 3 is a plan view showing an example of the lid material. 1...Tray, 3...Gas displacement seal chamber, 4...Lid material, 6...Coating device.

Claims (1)

[Claims] 1 Pre-formed trays are filled with food, etc., and the trays are conveyed one after another, and the rolled lid material is unwound and fed onto the tray, the lid material is overlapped with the tray, and the tray is sealed with a seal at the periphery of the tray. In the filling and packaging method, a treatment agent such as an anti-fog agent is applied to the inner surface of the lid material except for the sealing surface during the process from unwinding the lid material to stacking it on the tray. Filling and packaging method.