JPS5845346B2 - Fukurosozite Sonoseihou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to a bag material for a desiccant such as quicklime to be stored in food containers such as confectionery and seaweed, and a manufacturing method thereof.

The conventional bag material for quicklime desiccant is made by forming a polyethylene resin film layer on paper, but in this case, the polyethylene resin film layer is not very effective in reinforcing the paper, so the material is used as a quicklime desiccant. When used as a commercial bag, it is easy to tear in the longitudinal direction due to its manufacturing method, and when the material to be filled absorbs moisture, the bag is even more likely to tear.

Once the filling is damaged, the filling desiccant leaks out and contaminates the food products, which is unfavorable in terms of food hygiene.

Such accidents have become a social problem, and solving this problem has become a serious concern in the industry.

The object of the present invention is to provide a bag material for a desiccant such as quicklime that is completely unbreakable and a method for manufacturing the same, which eliminates the above-mentioned conventional drawbacks.

To explain the embodiment, 1 is an outer bag paper of a bag for a desiccant such as quicklime, 2 is an inner bag paper, and 3 is a gauze-like cloth held between the inner bag paper 2 and the outer bag paper 1. be.

5 is a laminated polyethylene resin film laminated on the surface of the inner bag paper 2 and having a moisture-absorbing ventilation section.

The outer bag paper 1, the inner bag paper 2, and the gauze-like fabric 3 are bonded together with an adhesive having air permeability.

This adhesive requires air permeability in order to promote moisture absorption, and for example, American starch paste is suitable, but it is of course possible to use other chemical adhesive materials without being limited thereto.

Further, the laminated polyethylene resin film 5 has a large number of moisture absorption ventilation parts, and although the ventilation holes 4 are shown as the ventilation holes in the illustrated embodiment, the ventilation parts are not limited to this, for example, ventilation grooves may be provided. Good too.

The vent hole 4 may be provided by a needle roll 10 heated to a temperature higher than the melting point of polyethylene, as shown in FIG. 4, as desired.

Further, as for the material of the gauze-like cloth 3, it is preferable to use cloth, but the material is not limited to this, and it is technically possible to use, for example, cotton, wool, chemical fiber, etc.

In the above structure, when manufacturing a bag material for desiccant such as quicklime, a gauze-like cloth 3 is sandwiched between the inner bag paper 2 and the outer bag paper 1, and both sides of the cloth 3 are coated with an air-permeable adhesive. A bag material is completed by adhering and laminating a polyethylene resin film 5 having moisture-absorbing vents on the surface of the inner bag paper 2.

The polyethylene resin film 5 to be attached to the surface of the inner bag paper 2 can be easily applied by laminating it.

That is, as shown in FIG. 3, after the gauze-like fabric 3 and the inner bag paper 2 are superposed on the upper surface of the outer bag paper 1, the inner bag paper 2 is
By placing molten polyethylene 7 heated from a melting tank 6 on the top surface and pressing it with a cooling roll 8 and a rubber roll 9, a polyethylene resin film 5 is laminated on the top surface of the inner bag paper 2. However, other laminating methods may be used, such as polymerizing the polyethylene resin film 5 on the upper surface of the inner bag paper 2 and pressing it with two heated rolls heated to a temperature higher than the melting point of polyethylene; Optionally, either or both of the inner bag paper 2 and the polyethylene resin film 5 may be coated with an adhesive for bonding.

The bag material for desiccant such as quicklime obtained by the above manufacturing method is sealed by bending along its center line and heat-pressing the periphery of the bag material, which copolymerizes. First, the side edges and the bottom are welded. Then, a desiccant such as quicklime is filled from the upper opening, and finally the upper edge is tightly sealed to complete a sealed bag containing the desiccant.

As mentioned above, the bag material for desiccant such as quicklime according to the present invention is
Since the gauze-like fabric 3 is interposed between the inner bag paper and the outer bag paper, the breakage resistance is significantly improved compared to conventional bag materials consisting only of paper and resin film, and the bag can be used for foodstuffs. When stored in a container, it will not be damaged by any external force, and it will have the great effect of completely preventing food contamination due to desiccant leakage.

In particular, an experimental example shows that although quicklime is a large solid when initially filled, once it absorbs moisture, it immediately becomes fine powder, and if the bag causes minute tears, there is a risk of leakage to the outside during shaking. , this danger can also be prevented.

In addition, it has a simple structure consisting of polyethylene resin film, inner bag paper, gauze-like cloth, and outer bag paper polymerized in this order, and when manufacturing it, an air permeable adhesive is used.
In addition, since the laminated polyethylene resin film is provided with a large number of moisture-absorbing vents, it is possible to sufficiently ensure the moisture-absorbing effect of the desiccant sealed in the bag.

It goes without saying that the bag material according to the present invention exhibits a sufficient function when filled with a suitable moisture absorbent such as calcium chloride in addition to quicklime used as a desiccant.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view with main parts broken away showing the superposition state of each member, Fig. 2 is a vertical cross-sectional view of Fig. 1, and Fig. 3 shows lamination processing. FIG. 4 is a front view showing a method of providing a moisture absorption vent. 1 is outer bag paper, 2 is inner bag paper, 3 is gauze-like fabric, 4 is a moisture absorption vent, 6 is a polyethylene resin film, 6 is a melting tank, 7 is molten polyethylene, 8 is a cooling roll, 9
1 indicates a rubber roll, and 10 indicates a needle roll.

Claims (1)

[Scope of Claims] 1. A gauze-like cloth is sandwiched between an inner bag paper and an outer bag paper, and a laminated polyethylene resin film having moisture absorption vents is laminated on the surface of the inner bag paper. Bag material for drying agents such as quicklime. 2. A gauze-like fabric is sandwiched between the inner bag paper and the outer bag paper, and both sides of the fabric are adhered with a breathable adhesive, and a Bot ethylene resin film is laminated on the surface of the inner bag paper. A method for producing a bag material for a desiccant such as quicklime, characterized in that the film is provided with an appropriate moisture-absorbing vent.