JPH08119297A - Push-out tube - Google Patents

Abstract

PURPOSE: To effectively push out toothpaste and the like contained in a stand tube, make it possible to easily check the remaining quantity of the contents and maintain the stable quality of the contents in shelf stability for a long period of time. CONSTITUTION: A push-out tube whose outermost layer and innermost layer are formed of thermoplastic resin layers has a vapor deposition layer 12 of a gas barrier layer at least at a part of a plurality of intermediate layers positioned between the outermost layer and the innermost layer. A see-through portion 20 is formed between the vicinity of the shoulder of the tube and the central vicinity in the longitudinal direction of the tube. Further, roughness (mean roughness at ten points: Rz) on an inner face of a PE layer of the innermost layer is made to be 1 to 8μ, preferably 2 to 5μ, whereby the settling and dropping of the contents are promoted as a stand tube, and the remaining quantity of the contents can be easily checked from the outside of the tube. Furthermore, the smoothness of the contents is maintained, the contents can be smoothly pushed out of the tube, and the quality guarantee and reliability of the contents can be markedly improved in shelf stability for a long period of time.

Description

Detailed Description of the Invention

[0001]

The present invention relates to toothpaste, cosmetics, foods,
The present invention relates to an extruded tube which contains a paste-like material such as a chemical substance and which is composed of a laminate film having a restoring property.

[0002]

2. Description of the Related Art Heretofore, as a container for packaging toothpaste, cosmetics, and other substances, an extruded tube in which aluminum foil or various plastics are laminated or laminated by multi-layer blow molding or inner surface coating is often used.

[0003]

A conventional extruded tube made of a laminated film is handled with the mouth side facing down so as to expect smooth extruding of the contents without extruding air at the time of extruding. It is known that the contents are settled in the tube as a so-called stand tube, and the contents are hardly dropped when the tube inner surface is rough.
It is difficult to check the remaining amount of contents from the outside even if a transparent window is formed on the tube body while it is still attached to the inner surface, and the contents cannot be pushed out smoothly, while the contents can easily be dropped. Therefore, if the inner surface of the tube is too smooth, in the tube production process, the contact area with the mandrel held by the inner surface of the tube increases, resulting in a decrease in workability, which is a problem. The present invention is intended to eliminate these conventional drawbacks, remarkably good restoration,
Improved appearance and handling as a stand tube makes it easy for the contents to settle and fall, the contents can be seen through from the outside, the remaining amount can be confirmed, and extrusion from the tube can be smoothed for long-term use. It is intended to provide an extruded tube that will withstand.

[0004]

According to the present invention, the outermost layer and the innermost layer are composed of a thermoplastic resin layer, and a gas barrier is provided in at least a part of a plurality of intermediate layers located between the outermost layer and the innermost layer. In an extruded tube having a layer, a see-through portion is formed between at least the vicinity of the shoulder portion and the vicinity of the center in the longitudinal direction of the tube, and the inner surface roughness (Rz) of the innermost layer is formed.
Is 1 to 8 μ.

[0005]

In the tube of the present invention, a transparent portion is formed at least between the vicinity of the shoulder portion and the vicinity of the center in the longitudinal direction of the tube, and the inner surface roughness (Rz) of the innermost layer is set to 1 to 8 µ. When the main body is placed or stored with the mouth down, the contents inside the tube will smoothly settle down along the inner surface of the tube over time, gather at the mouth, and the inside can be seen through from the outside of the tube at the see-through part. Extruded tube that not only allows easy identification of the remaining amount of contents, but also has good restorability and prevents deterioration and reduction of contents such as toothpaste that is difficult to store while maintaining stability, and is reliable in quality. Can be used as

[0006]

EXAMPLE An example of the extruded tube for toothpaste shown in FIGS. 1 and 2 will be described with reference to the examples of the present invention. The outermost layer and the innermost layer are composed of transparent polyethylene (PE) layers 7 and 9, and the outermost layer and the outermost layer are the same. An extruded tube having a vapor-deposited layer 12 of silicon oxide (SiOx) vapor-deposited on a polyvinyl alcohol layer 13 and a colored printing layer 2 on at least a part of a plurality of transparent intermediate layers located between the inner layer and the transparent intermediate layer, An uncolored transparent see-through portion 20 is formed in the printed layer 2 in the longitudinal direction of the tube, and the inner surface roughness (ten-point average roughness: Rz) of the innermost PE layer 9 is 1 to 8 µ, preferably 2 µm. A tubular tube body 17 is constituted by the laminated material 10 having a thickness of 5 μ, a mouth member 14 having a detachable cap 18 is provided at one end of the tube body 17, and the other end is a jointed tail portion 16 and an extruded tube. There is.

That is, the thickness 12 which has been subjected to the double-sided corona discharge treatment.
μm biaxially oriented polyethylene terephthalate (PET)
On the layer 1, a printed layer 2 having an indication of polyurethane-based gravure ink is provided in the longitudinal direction of the tube, which is an uncolored transparent see-through portion 2
It is prepared to form 0. The colored and opaque portions of the printed layer 2 are overlapped with white printing in order to obtain a sufficient hiding property. On the other hand, corona discharge processed on both sides to a thickness of 1
2 μm biaxially stretched polyethylene terephthalate (PE
T) layer 11 and biaxially stretched polyvinyl alcohol (PVA) layer 13 having a thickness of 12 μm and having a transparent or semi-transparent vapor deposition layer 12 of silicon oxide (SiOx) provided on one side thereof are coated with a urethane adhesive on the vapor deposition layer side. 100 μm which was laminated by using the PVA layer 13 on the surface of the non-evaporated layer and which was corona-discharge treated on one surface
A linear low-density polyethylene (PE) layer 4 of m is laminated on the corona-treated surface by the urethane adhesive layer 3 and provided. Then, after coating the printing layer 2 with a urethane anchor coating agent, a low-density polyethylene (PE) having a thickness of 20 μm is formed by an extrusion laminating method at a temperature of 320 ° C.
A PET layer 1 laminated with the surface of the linear low density polyethylene layer 4 via a layer 5 and having the printed layer 2
The surface of is coated with urethane anchor coating agent,
A low-density polyethylene (PE) layer 6 having a thickness of 20 μm is extrusion coated, and an antistatic linear low-density polyethylene (PE) layer 7 having a thickness of 120 μm is further laminated and provided as an outermost layer of the tube. Next, PE with the vapor deposition layer 12
The surface of the T layer 11 is coated with a urethane anchor coating agent, and then an ethylene methacrylic acid resin (EMAA) layer 8 is provided by extrusion coating with a thickness of 40 μm, and a low density polyethylene (PE) layer 9 is further extruded with a thickness of 60 μm. It is coated and provided as an innermost layer of the tube, and the inner surface of the PE layer 9 has a roughness of 1 to 8 by using a semi-mat type cooling roll.
The laminate material 10 is capable of ensuring a proper slipperiness of μ. Then, using this laminated material 10, the PE
A tubular tube body is formed by a heat welding method with the layer 9 as an inner surface, and compression molding of high-density polyethylene is performed to provide a shoulder of the tube container, a mouth member 14 and a joint end portion 16 to form an extruded tube.

In this example, the PVA layer 13 has a silicon oxide (Si
Ox) is provided as the vapor deposition layer 12, but two or more transparent plastic layers of PE layers 6 and 7 which are outside the tube body 17 via the PET layer 1 are laminated on the surface of the printing layer 2 to form an air layer. In addition to providing good backing properties, the stand-type tube body 17 is provided with appropriate waist strength.
In addition, the vapor deposition layer 12 is positioned inside the PVA layer 13 to effectively block the permeation of water, and
It is preferable to properly protect the VA layer 13 and ensure the gas barrier property, but the PET layer 11, the EMAA layer 8 and the PE also on the inner side.
Two or more transparent plastic layers of the layer 9 are laminated so that the inner and outer layers are balanced around the vapor deposition layer 12. In this case, the transparent portion 20 is formed as a window portion in the opaque portion, but not limited to a continuous slit, an intermittent slit or a scattered pattern may be used as the transparent portion, and a printed pattern or The characters may be used as the see-through portion, or a predetermined range other than the printed portion such as the character may be used as the area of the transparent portion and used as the see-through portion 20.

The vapor-deposited layer 12 may be vapor-deposited on a layer such as the PET layer 11 located inside the PVA layer 12 in some cases, and the vapor-deposited layer 12 does not necessarily have to be adjacent to the PVA layer 13. Also, the EMAA layer 8 can be omitted. Further, by performing white printing on the inside of the printing layer 2 twice or more in advance, the yellow coloring of the vapor deposition layer 2 can be prevented from being seen from the outside, and the outside printing layer 2 can sufficiently exert its effect. it can.

Further, in the example of FIG. 3, the ethylene instead of the PVA layer 13 (example of FIG. 1) for depositing the deposition layer 12 - vinyl alcohol copolymer (EVOH) layer 13 ₁ used,
A polyester layer 11 ₁ and a polyethylene layer 9 are laminated on the vapor deposition layer 12 with an adhesive layer 3 ₁ interposed therebetween, and the EVO
If necessary, the anchor coat layer 2 may be provided on the other surface of the H layer 13 _1.
1, a white polyethylene layer 22 whitened by titanium oxide is laminated, a printing layer 2 is laminated using it as a back layer, and a polyester layer 9 and a polyethylene layer 7 are laminated thereon as a protective film. The film 10 ₁ is used and has substantially the same performance as the embodiment of FIGS. 1 and 2. In this case, on the outer side of the vapor deposition layer 12 of the tube body 17, a white polyethylene layer 22 of about 50 to 200 μm whitened by titanium oxide.
Is preferably laminated so that the yellow coloring of the vapor deposition layer 2 cannot be seen from the outside so that the printing layer 2 on the outside can sufficiently exert its effect.

[0011] In the case of FIGS. 1 and 2, wherein the deposited layer 2 is deposited to a thickness 500~2000Å the PVA layer 13 or the EVOH layer 13 ₁ having a thickness of 5 to 30 [mu] m, further the whole of the laminate material 10 Total thickness is 250
To 450 μm, preferably 330 to 400 μm, the PET layers 1 and 11 and the PE layer 6 serving as inner and outer protective layers.
Select the thickness of 7, 8 and 9. Further, as the vapor deposition base material, a PET layer, a nylon layer or the like may be used in addition to the TVA layer and the EVOH layer.

The transparent portion 20 has a slit-like shape of 1 to 8 mm, preferably 3 to 5 m, between the vicinity of the shoulder of the tube body 17 and the vicinity of the center in the longitudinal direction or the hip.
One or a plurality of strips each having a width of m are formed at a position that does not cover the display portion of the printing layer 2, for example, in the vicinity of the seal portion 15 or at a position facing the seal portion 15. Each layer in the transparent portion can be seen through from the outside of the tube body 17. Is considered as. In this case, in addition to forming the transparent portion 20 in the printing layer, it is easily formed by a manufacturing method in which the pigment is removed or the side edge is laminated with a transparent portion laminating material at the sealing portion. You can choose.

The stand extruded tubes of Examples 1 and 2 were tested for drop of toothpaste using a commercially available toothpaste, and the results are shown in Tables 1 and 2.

[0014]

[Table 1]

[0015]

[Table 2]

In the drop test 1 of the toothpaste shown in Table 1, it was 25
C., 100% RH, viscosity 68 cps.
30g of toothpaste A (Clear Clean) at 25 ° C is attached to the upper end of the inner surface side of a plastic sheet test piece made by cutting open slitted tubes with a length of 10 cm and different inner surface roughness, and the tube is prepared at each elapsed time. The slit portion was observed from the outer surface, and the length from the upper end of the slit portion that was seen from the outer surface side after the toothpaste dropped (the length of the slit that was seen after the toothpaste dropped) was measured. Further, in Table 2, as in Experiment 1, the viscosity was 92 cps. / 25 ° C
Using toothpaste B (medicinal denter lion), after the toothpaste drops on the inner surface side of the plastic sheet test piece, the length from the upper end of the slit part that can be seen through from the outer surface side (the slit visible after dropping the toothpaste (Length) was measured.

As shown in Tables 1 and 2, the inner surface roughness (Rz) of the PE layer 9 which is the innermost layer of the tube body 17 was 5 μm and 7 μm, and excellent results were obtained when the toothpaste was dropped.
In terms of workability in the plastic tube production process, if the inner surface of the tube is too smooth, the contact area with the mandrel that holds the tube from the inner surface increases and slippage tends to deteriorate, resulting in a roughness of the inner surface of the tube of 1 μm. It is necessary to be not less than 2 μm, preferably 2 μm or more (semi-matte type), and it is effective that the upper limit is 8 μm or less, preferably 5 μm or less. Further, if it is 11μ (matte type), the toothpaste hardly drops and cannot be used. In addition, for the measurement of the roughness (Rz) of the inner surface of the PE layer 9 which is the innermost layer,
Measuring equipment manufactured by Kosaka Laboratory: Model number, three-dimensional shape roughness measuring instrument 2EF-10K, roughness analyzer AY-22
It measured based on the standard of S-B0601.

As the tube main body 17, a tubular body is formed by the joint seal portion 15 in which both side edges of the laminate material 10 are butted against each other, or are laminated and bonded.
A mouth member 14 having a shoulder portion having a detachable cap 18 by screwing or fitting is adhesively arranged at one end of the cylindrical body, and the other end is adhered to form a joint bottom portion 16, and tooth brushing is performed. It is a container that can be filled with contents such as, and can be stored and transported, without changing the flavor, separating liquid, and other changes, maintaining the smoothness of toothpaste and smoothing out of the container for long-term storage. Is possible.

[0019]

INDUSTRIAL APPLICABILITY In the present invention, the outermost layer and the innermost layer are composed of a thermoplastic resin layer, and an extrusion having a gas barrier layer in at least a part of a plurality of intermediate layers located between the outermost layer and the innermost layer. In the tube, a transparent portion is formed between at least the vicinity of the shoulder of the tube and the vicinity of the center in the longitudinal direction, and the roughness (Rz) of the inner surface of the innermost layer is set to 1 to 8 μ. When placed or stored with the tube down, the contents inside the tube will settle down along the inside surface of the tube over time and collect at the mouth. In addition to being easy to use, the extruded tube also has good air bag properties and restoration properties, and it can be used without being unclean in handling, and it can reduce the deterioration and flavor deterioration of toothpaste as much as possible for the contents. Without adversely various adverse effects, maintaining the smoothness of the contents, extruded from the tube can also be smooth, it can significantly improve the quality assurance and reliability in long-term storage.

[Brief description of drawings]

FIG. 1 is a partially enlarged vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a partially cut side view showing a usage state of the example of FIG.

FIG. 3 is a partial enlarged vertical sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 polyethylene terephthalate layer 2 printing layer 3 adhesive layer 4 polyethylene layer 5 polyethylene layer 6 polyethylene layer 7 polyethylene layer 8 ethylene methacrylic acid resin layer 9 polyethylene layer 10 laminating material 11 polyethylene terephthalate layer 12 vapor deposition layer 13 polyvinyl alcohol layer 14 mouth member 15 joining seal part 16 joining bottom part 17 tube body 20 see-through part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keisuke Kato 3-19-14 Ogimachi, Odawara City, Kanagawa Prefecture (72) Kiyoshi Toda 1-1-1, Ichigayakacho, Shinjuku-ku, Tokyo Dai Nippon Printing Co., Ltd. (72) Inventor Masahiro Shimoyamada 1-1-1, Ichigayaka-cho, Shinjuku-ku, Tokyo Within Dai Nippon Printing Co., Ltd.

Claims (1)

[Claims] 1. An extruded tube comprising a thermoplastic resin layer as an outermost layer and an innermost layer, and a gas barrier layer in at least a part of a plurality of intermediate layers located between the outermost layer and the innermost layer, An extruded tube, wherein a see-through portion is formed at least between the vicinity of the shoulder portion and the vicinity of the center in the longitudinal direction of the tube, and the roughness (Rz) of the inner surface of the innermost layer is set to 1 to 8 µ.