JP3022441U - Powder packaging paper bag - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To prevent fine powder from back jetting and adhering to a filling port of a bag body at the time of powder filling, and to prevent a defective product or a defective sealing when hot sealing after filling. To provide a powder packaging paper bag. SOLUTION: A cylindrical injection valve having polyethylene laminated on the outer peripheral surface is housed in the central portion of the stepped cutting portion of a tubular bag body having polyethylene laminated on the inner surface, and the stepped cutting portion is hot-sealed. Then, the entire mouth except for the tubular injection valve is adhered, and hot melt is applied to the entire surface of the stepped cut mouth, and after the powder is filled, the mouth is folded back and heat-bonded to the tubular bag body.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention mainly relates to a paper bag for packaging fine powder such as protein and milk powder.

[0002]

[Prior art]

 This type of paper bag has a closed bottom and an open mouth. At the time of use, the spout (cylindrical powder injection port) is inserted into the mouth and the powder is filled by the drop method, and the rear mouth is closed. Therefore, a space is created between the spout and the cross-sectional area of the mouth of the bag, from which the finely powdered contents flow backward and spout out. As a result, fine powder adhered to the voids that formed the passages, and during hot sealing after filling, this became "kogation" which could cause defective products or cause poor sealing.

[0003]

[Problems to be solved by the device]

 The problem to be solved by the present invention is to prevent backflow of fine powdered contents from the mouth of the bag during powder filling, resulting in defective products or hot sealing after filling. To provide a powder packaging paper bag without

[0004]

[Means for Solving the Problems]

 The means of the present invention are as follows. It is made by stacking kraft paper, etc., and polyethylene-laminated the innermost surface, or consists of a tubular bag body using polyethylene film on the innermost layer. Insert it into the bag body almost at the center of the stepped cut opening and hot seal the stepped cut opening to seal the entire mouth except the tubular injection valve. Hot melt was applied to the entire surface of the cutting opening, and after filling the powder, the opening including the opening of the tubular injection valve was folded back and heat-bonded to the tubular bag body to seal it.

[0005]

【Example】

 1 to 4 show a first embodiment of the present invention, in which reference numeral 1 is a tubular bag main body made by stacking kraft paper in two layers, and the left and right sides are gusseted as shown in FIG. Polyethylene laminate layer 2 is applied to the inside, and the mouth of the tubular bag body 1 is stepped by cutting the inside and outside of the kraft paper to form a stepped cutting port 3, and the tubular injection valve 4 is housed in the center. Then, the opening 4a of the tubular injection valve 4 is seen through the stepped cutting opening 3, and a polyethylene laminate layer 5 is layered on the outer peripheral surface of the tubular injection valve 4. Therefore, when the stepped cutting portions 3 and 3a are hot-sealed, all the openings other than the cylindrical injection valve 4 are adhered to be in a sealed state. After that, as shown in FIG. 1, hot melt 6 is applied to the entire surface of the stepped cutting opening 3 and the opening 4a of the cylindrical injection valve 4. After filling the powder, the mouth is folded back and heat-bonded to the tubular bag body 1 to seal it. Next, in the second embodiment shown in FIGS. 5 to 7, a band-shaped paper (inner patch) 7 is attached to the stepped cutting opening 3 to seal the opening other than the tubular injection valve 4, As shown in FIG. 3, hot melt 8 is applied to the inner surface of the mouth 4a of the tubular injection valve 4 (this may not be applied), and the hot paper 6 is applied to the strip 7 and the upper edge of the tubular bag body 1. Is applied, and after filling the powder, the mouth is folded back and heat-bonded to the tubular bag body 1 to seal it.

[0006]

[Effect of device]

 According to the present invention, the powder does not flow backward when the powder is filled. That is, since no void is created between the cross-sectional areas of the tubular bag body and the tubular injection valve, it is possible to prevent the powder from back jetting and ejecting to the outside as in the conventional case. Since it does not adhere, there is no "kogure" when hot-sealing after powder filling, and it is possible to reliably bond and seal.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

4 is a cross-sectional view taken along the line CC of FIG.

FIG. 5 is a front view showing a second embodiment.

FIG. 6 is a front view showing a state in which a band-shaped paper is attached to the stepped cutting opening of the tubular bag body.

FIG. 7 is a perspective view of a tubular injection valve.

[Explanation of symbols]

 1 Cylindrical bag 2 Polyethylene laminate layer 3 Step cutting part 3a Heat sealing part of step cutting part 4 Cylindrical injection valve 4a Cylindrical injection valve opening 5 Polyethylene laminating layer 6 Hot melt 7 Strip paper (8 Hotmelt)

Claims (2)

[Scope of utility model registration request] 1. A tubular injection in which kraft paper or the like is laminated and formed, and a polyethylene bag is used for the innermost surface or a polyethylene bag is used for the innermost surface, and a polyethylene bag is used for the outer peripheral surface. While inserting the valve into the approximately central part of the step cut opening of the tubular bag body,
Hot seal the stepped cutting port to seal the entire mouth except the tubular injection valve, and apply hot melt to the entire surface of the tubular injection valve opening and the stepped cutting port, and after filling the powder into a tubular shape. A powder packaging paper bag, characterized in that the mouth portion including the opening portion of the injection valve is folded back and heat-bonded to the tubular bag body for sealing. 2. The stepped cutting opening is coated with a band-shaped paper to seal the openings other than the tubular injection valve, and hot melt is applied to the inner surface of the opening of the tubular injection valve. Powder packaging paper bag.