JPH06285956A - Tube container and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a tube container of which the body part is always kept in a flat state and which is excellent in the-property of pressing out the contents and, moreover excellent in a placing stability and the property of display and in discriminability of the contents displayed on the body part. CONSTITUTION:A tube container 1 is composed of a mouth part 3, a flat shoulder part 4, a body part 5 and a bottom part 6. The sectional shape of the body part 5 being continuous to the shoulder part 4 is flat and the rate of flatness is 170 to 300%, while the radius ratio of curvature constituting a long side and a short side 15 300 to 600%. The wall thickness on the long side of the body part 5 is made larger than that on the short side thereof and the thickness ratio thereof is made 1:98 to 1:60. The tube container 1 is prepared by a method wherein a flat hollow body is molded by blowing parison of thermoplastic, the end edge part of the bottom part 6 of the blow-molded hollow body is cut the contents are filled up therein and then opposite long-side cut end edges of the hollow body are joined by solvent welding so that a sealed part 8 is made.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothpaste, a viscous cosmetic, a viscous food, and a tube container for other viscous materials, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a plastic tube container such as a toothpaste has a basic sectional shape of a body as described in, for example, Japanese Patent Publication No. 57-57338 and Japanese Utility Model Publication No. 3-56546. It is a perfect circle, and by filling the contents and welding and sealing the bottom edge, it has a flat shape to some extent.

[0003]

This type of tube container is used to squeeze out the contents by the operation of opening the mouth and crushing the body, but as described in the above-mentioned publication. In a conventional tube container in which the shape of the body is basically circular, even if the bottom edge is welded and sealed and the body is flat, the body always swells so as to approach a perfect circle. Since it has resilience, there is a disadvantage that the air is sucked in from the mouth and a space is created in the body, especially when the remaining amount of the content is low, and the squeezing property of the content is greatly deteriorated. .

In view of the above-mentioned drawbacks of the prior art, the present invention has a flat body portion at all times, is excellent in squeezing out contents, and is excellent in placement stability and exhibitability. It is an object of the present invention to provide a tube container excellent in distinguishability of the displayed contents displayed on the section, and a manufacturing method thereof.

[0005]

In order to achieve the above object, the present invention is directed to a thermoplastic tube container comprising a mouth portion, a flat shoulder portion, a body portion and a bottom portion. The cross section is flat and the flatness is 170
% -300%, the radius of curvature that constitutes the long side and the short side is 3
It is a tube container having a content of 00% to 600%.

Further, according to the present invention, in the tube container having the above construction, the thickness of the long side of the body is made thicker than the thickness of the short side, and the thickness ratio is 1:98 to 1:60. Is.

In the method for manufacturing a tube container according to the present invention, a thermoplastic parison is placed in a blow molding die, and a mouth portion, a flat shoulder portion, a flat tubular body portion and a bottom portion are provided. Blow molding a flat tubular hollow body consisting of, cutting the bottom of the blow molded flat tubular hollow body, welding the opposite long side cutting edges of the flat tubular hollow body And the step of joining with each other.

[0008]

In the tube container according to the present invention, since the sectional shape of the body portion connected to the shoulder portion is flat, the body portion always has a flat shape regardless of the viscosity of the content or the decrease of the content. Therefore, the contents can be squeezed out easily and surely from the beginning to the end of use. The flatness of the body is 170% to 300%, the radius of curvature of the long side and the short side is 300% to 600%, and the body has a flat shape with an appropriate bulge. Therefore, the display surface of the body is directed upward, and its distinguishability is good.

In addition, the thickness of the long side of the body is made thicker than the thickness of the short side, and the thickness ratio is 1:98 to 1:60, whereby the long side of the flat body is The smooth surface is always maintained, and the squeezing property of the contents is further improved.

According to the method of manufacturing a tube container of the present invention, the tube container can be efficiently manufactured by blow molding of thermoplastics.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 illustrates a tube container according to the present invention. 1 is a tube container. This tube container 1 is formed by molding the hollow body 2 shown in FIG. 2 by blow molding of a thermoplastic as described later. 3 is a mouth part, 4 is a shoulder part, 5 is a body part, and 6 is a bottom part. The shoulder part 4 has an elliptical flat shape as shown in FIG. 3, and the body part 5 connected to the shoulder part 4 is also formed. As shown in FIG. 3, the cross section from the shoulder 4 to the bottom 6 is elliptical and flat. A label 7 is attached to one side or both sides of the body portion 5. A cap (not shown) is attached to the mouth portion 3 and sealed. Reference numeral 8 is a sealing portion of the bottom portion 6. The blow-molded hollow body 2 constituting the tube container 1 has a closed bottom portion 6 as shown in FIG. 2. Therefore, the bottom portion 6 is cut by cutting as shown by AA in FIG. Open and fill the contents from the opening. Then, as shown in FIG. 1, the opposing long side edges of the bottom portion 6 are welded and sealed.

The thermoplastic resin forming the tube container 1 is made of blow-moldable material such as polyethylene, polypropylene, polyamide, vinyl chloride and ABS resin in a single layer or a laminated structure of these thermoplastics. However, especially the flexural modulus is 700
If the elastic material is 0 Kg / cm ² or less, the squeezability of the content is good. Label 8 is optional,
If this is the same material as the tube container 1, the body part 5
It is preferable because it has a good sticking property to (1) and is easy to process when recycling the tube container 1.

As shown in FIG. 3, in the tube container 1, the sectional shape of the body portion 5 connected to the shoulder portion 4 is elliptical and flat as described above. L1,
If the minor axis is L2, flatness (%) = (L1 / L2) ×
100, the flatness of the body 5 is 170% to 300%
(Preferably 180% to 250%). If the radius of curvature of the long side is R1 and the radius of curvature of the short side is R2, the radius of curvature ratio (%) = (R1 / R2) × 100, and the radius of curvature ratio of the body portion 5 is 300% to 600% (preferably 400% to 600%) Furthermore, the thickness of the long side of the body 5 is thicker than the thickness of the short side, and the thickness ratio is 1:98 to 1:60. .

According to the tube container 1 configured as described above, since the body portion 5 connected to the shoulder portion 4 has a flat cross-sectional shape, the body portion 5 is irrespective of the viscosity of the content and the decrease of the content. Is always flat. Therefore, the contents can be squeezed out easily and surely from the beginning to the end of use. The flatness of the body 5 is 170
% -300%, the ratio of the radius of curvature forming the long side and the short side is 3
00% to 600%, which is a flat shape having an appropriate bulge, so that the tube container 1 has good placement stability, and therefore the display surface of the body portion 5 can be stably directed upward. It is possible, and its distinguishability is good. Moreover, the thickness of the long side of the body 5 is thicker than the thickness of the short side, and the thickness ratio is 1:98 to 1:60. At this time, the short side is largely deformed, and the long side always holds a substantially smooth surface, and the squeezing property of the contents is further improved.

FIG. 4 shows another embodiment. As shown in FIG. 4, the flat body portion 5 may be formed by further deforming the elliptical shape so that the long side thereof has a planar shape. And if it does in this way, the operativity which squeezes the body part 5 and squeezes out a content is improved further. Further, it is easy to attach the label 7 to the body portion 5.

FIG. 5 shows a blow molding mode of the hollow body 2 constituting the tube container 1 according to the present invention. In FIG. 5, 9 and 9 are split molds and 10 and 10 are cavities thereof, and the cavities 10 and 10 have molding portions 11 and 11 of the sticking concave portion of the label 7, respectively, and A label 7 is arranged on the molding portions 11, 11.
Reference numeral 12 is a die, and 13 is a thermoplastic parison. The cavities 10, 10 of the split molds 9, 9 are shown in FIG.
The hollow container 2 constituting the tube container 1 shown in FIG. In order to manufacture the tube container 1 according to the present invention, the hollow body 2 is blow-molded by the blow molding mode. The hollow body 2 has a flat tubular shape including a mouth portion 3, a flat shoulder portion 4, a flat tubular body portion 5 and a bottom portion 6. Next, the blow-molded flat tubular hollow body 2 is cut at the edge AA of the bottom 6 and opened to fill the tube container 1 with the contents. And the flat tubular hollow body 2
The opposite long side cut edges are joined by welding and sealed to obtain the tube container 1 filled with the contents.

[0017]

EFFECTS OF THE INVENTION According to the present invention, the body is always kept flat, and the contents are excellently squeezed out, and the placement stability and the exhibitability are good, and the contents are displayed on the body. It is possible to obtain a tube container having excellent distinguishability of displayed contents.

[Brief description of drawings]

FIG. 1 is a front view of a tube container according to the present invention.

FIG. 2 is a front view of a blow-molded hollow body according to the present invention.

FIG. 3 is a plan view of what is shown in FIG.

FIG. 4 is a plan view of a tube container according to another embodiment.

FIG. 5 is a cross-sectional view showing an aspect of blow molding the hollow body according to the present invention.

[Explanation of symbols]

 1 Tube Container 2 Hollow Body 3 Mouth 4 Shoulder 5 Body 6 Bottom 7 Label 8 Sealing Section 9,9 Split Mold 10,10 Cavity 11,11 Labeling Recessed Molding Section 12 Die 13 Parison

Claims (3)

[Claims] 1. A thermoplastic tube container comprising a mouth, a flat shoulder, a body and a bottom, wherein the body connecting to the shoulder has a flat cross-section and an oblateness of 17.
A tube container characterized in that 0% to 300% and a radius of curvature ratio of the long side and the short side are 300% to 600%. 2. The tube container according to claim 1, wherein the thickness of the long side of the body is made thicker than the thickness of the short side, and the thickness ratio is 1:98 to 1:60. . 3. A thermoplastic cylindrical parison is placed in a blow molding die to blow mold a flat tubular hollow body comprising a mouth, a flat shoulder, a flat tubular body and a bottom. And the step of cutting the bottom of the blow-molded flat tubular hollow body, and the step of joining the opposing long side cut edges of the flat tubular hollow body by welding. A method for manufacturing a tube container, comprising: