Inflated polypropylene (IPP) odor-proof bags

Abstract

To provide an odor-proof bag that can improve odor-blocking functionality. [Solution] The inflation polypropylene (IPP) odor-proof bag 100 comprises a polypropylene sheet 105 formed into a tube shape by inflation molding, an opening 110 provided at one end of the polypropylene sheet, a bottom 120 formed by closing the other end of the polypropylene sheet, a pair of bag surfaces 150 facing each other between the opening and the bottom, and a pair of side parts 130, 140 connecting the pair of bag surfaces. The pair of bag surfaces and the pair of side parts are side walls of a polypropylene sheet that do not have a circumferentially continuous joint. The polypropylene sheet has a molecular orientation resulting from inflation molding.

Description

Technical Field

[0001] This specification discloses a technology related to deodorant bags.

Background Art

[0002] <� A deodorant bag is a bag for containing odorous substances so that the odor does not leak to the outside. Patent Document 1 describes a deodorant bag made using a sheet made of an unstretched polypropylene film. The deodorant bag of Patent Document 1 is formed into a bag shape by folding a single rectangular sheet in half and joining a pair of side portions of the sheet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since the deodorant bag of Patent Document 1 is formed by joining the side portions of the sheet, there is a problem that odor easily leaks from the joined portion. In addition, the unstretched polypropylene film has a relatively high gas permeability, and further improvement in deodorant performance has been demanded.

Means for Solving the Problems

[0005] One embodiment disclosed herein is an odor-proof bag made of blown polypropylene (IPP). This odor-proof bag comprises a polypropylene sheet formed into a tube shape by blown molding, an opening provided at one end of the polypropylene sheet, a bottom formed by closing the other end of the polypropylene sheet, a pair of bag surfaces facing each other between the opening and the bottom, and a pair of sides connecting the pair of bag surfaces. The pair of bag surfaces and the pair of sides are side walls of the polypropylene sheet that do not have a circumferentially continuous joint. The polypropylene sheet has a molecular orientation resulting from blown molding. With this embodiment of the odor-proof bag, by using a polypropylene sheet formed into a tube shape, a joint at the side is unnecessary, and the path of odor leakage can be reduced. In addition, since the polypropylene sheet formed by blown molding is slightly stretched during molding, the molecular orientation is increased compared to an unstretched film, and gas permeability is reduced. This contributes to improved odor-proof performance. [Brief explanation of the drawing]

[0006] [Figure 1] This is an explanatory diagram showing an odor-proof bag. [Figure 2] This is a cross-sectional view showing the cross-section of the odor-proof bag. [Figure 3] This is a cross-sectional view showing the longitudinal section of the odor-proof bag. [Modes for carrying out the invention]

[0007] Figure 1 is an explanatory diagram showing the odor-proof bag 100. Figure 2 is a cross-sectional view showing the cross-section of the odor-proof bag 100. Figure 3 is a cross-sectional view showing the longitudinal section of the odor-proof bag 100. The cross-section in Figure 2 is the cross-section obtained by cutting the odor-proof bag 100 along the line segment F2-F2 in Figure 1. The longitudinal end face in Figure 3 is the cross-section obtained by cutting the odor-proof bag 100 along the line segment F3-F3 in Figure 1.

[0008] The odor-proof bag 100 is a bag designed to contain items with odors (such as food waste, soiled items, used diapers, etc.) to prevent odors from leaking out. The odor-proof bag 100 can also be used to contain food items such as bread. The dimensions of the odor-proof bag 100 are 310 mm in height, 125 mm in width, and 60 mm in depth. The dimensions of the odor-proof bag 100 can be adjusted as needed depending on the items to be contained. The thickness of the odor-proof bag 100 is approximately 0.025 mm. The thickness of the odor-proof bag 100 can be adjusted as needed depending on the items to be contained.

[0009] The odor-proof bag 100 is formed using a polypropylene sheet 105. The polypropylene sheet 105 is a sheet made of blown polypropylene (IPP) formed into a tubular shape by inflation molding. The polypropylene sheet 105 has molecular orientation resulting from inflation molding.

[0010] The polypropylene sheet 105 is milky white. The polypropylene sheet 105 is not limited to milky white; it may also be blue, pink, brown, or other colors. By coloring the polypropylene sheet 105, the contents contained in the odor-proof bag 100 can be made less visible. The polypropylene sheet 105 may also be transparent. The polypropylene sheet 105 may also be semi-transparent. At least one surface of the polypropylene sheet 105 may be provided with a coating layer that has an odor-proof function.

[0011] The odor-proof bag 100 comprises an opening 110, a bottom 120, a pair of bag surfaces 150, 160, and a pair of side surfaces 130, 140.

[0012] The opening 110 of the odor-proof bag 100 is a portion provided at one end of the tubular polypropylene sheet 105. The user of the odor-proof bag 100 can place the contents into the bag 100 through the opening 110.

[0013] The bottom 120 of the odor-proof bag 100 is a portion formed by closing the other end of a tubular polypropylene sheet 105. As shown in Figure 3, the bottom 120 is closed by joining a pair of bag surfaces 150 and 160 together. The bottom 120 is a joint formed by heat welding the pair of bag surfaces 150 and 160 together. The bottom 120 may also be a joint formed by joining the pair of bag surfaces 150 and 160 together with adhesive.

[0014] The pair of bag surfaces 150 and 160 in the odor-proof bag 100 are surfaces that face each other between the opening 110 and the bottom 120. The pair of bag surfaces 150 and 160 are part of the side wall of the polypropylene sheet 105, which does not have a continuous joint in the circumferential direction.

[0015] The pair of side portions 130 and 140 in the odor-proof bag 100 are the parts that connect the pair of bag surfaces 150 and 160. The pair of side portions 130 and 140 are part of the side wall of the polypropylene sheet 105, which does not have a continuous joint in the circumferential direction. The pair of side portions 130 and 140 have gussets formed on them to give depth to the odor-proof bag 100. The pair of side portions 130 and 140 may also have folds that connect the pair of bag surfaces 150 and 160 without forming gussets.

[0016] As shown in Figure 2, the pair of bag surfaces 150, 160 and the pair of side portions 130, 140 are side walls of the polypropylene sheet 105 that do not have a continuous joint in the circumferential direction.

[0017] As described above, the odor-proof bag 100 eliminates the need for joints at the sides 130 and 140 by using a tubular polypropylene sheet 105, thereby reducing the path of odor leakage. Furthermore, the polypropylene sheet 105 formed by inflation molding is subjected to slight stretching during molding, resulting in higher molecular orientation and reduced gas permeability compared to an unstretched film. This contributes to improved odor-proof performance.

[0018] The technologies disclosed herein are not limited to the embodiments, examples, and modifications described above, and can be implemented in various configurations without departing from the spirit thereof. For example, the technical features of the embodiments, examples, and modifications described above that correspond to the technical features of each form described in the summary of the invention may be replaced and combined as appropriate to solve some or all of the above-described problems or to achieve some or all of the above-described effects. Furthermore, technical features not described as essential in this specification may be deleted as appropriate. [Explanation of symbols]

[0019] 100... Odor-proof bags 105...Polypropylene sheet 110...Opening 120...Bottom 130, 140... side 150,160…Bag side

Claims

[Claim 1] It is an odor-proof bag, A polypropylene sheet formed into a tube shape by inflation molding, An opening provided at one end of the aforementioned polypropylene sheet, The bottom portion is formed by closing the other end of the polypropylene sheet, A pair of bag surfaces facing each other between the opening and the bottom, A pair of side portions connecting the pair of bag surfaces Equipped with, The pair of bag surfaces and the pair of side portions are side walls of the polypropylene sheet that do not have a continuous joint in the circumferential direction. The polypropylene sheet is an inflated polypropylene (IPP) odor-proof bag having a molecular orientation resulting from the inflation molding process.

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