JP3116100B2 - Extrusion container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extrusion container .

[0002]

2. Description of the Related Art Conventionally, in the fields of civil engineering, construction, automobiles, aircrafts, electric appliances, etc., for example, in order to seal joints and gaps and repair cracks, for example, drying is performed. Paste-like sealants and caulks, which become elastomeric by reaction or react with moisture or air to become elastomeric, are used.

[0003] Such sealant materials and caulking materials
(S) is a cylindrical body (1a) having both ends opened as shown in FIG.
And a container body (1) comprising a closing plate (1b) fixed to one end of the body (1a), and a discharge port (not shown) formed in the closing plate (1b) of the container body (1). Discharge nozzle (2),
A short cylindrical peripheral wall that slides on the inner peripheral surface of the body (1a) of the container body (1)
(3a) and the end of the peripheral wall (3a) on the side of the discharge nozzle (2).
A movable closing member comprising a bottom wall portion (3b) provided and slidably fitted in the container body (1) in its axial direction.
(3) is filled in the extrusion container, and by moving the movable closing member (3) to the discharge nozzle (2) side, it is extruded from the discharge nozzle (2) tip to be used. Has become.

The body (1a) of the container body (1) is mainly made of plastic such as polyethylene or polypropylene, or paper, and is made of a composite material obtained by combining a plastic film and / or a metal foil with this, or a surface treatment. It is formed using a metal such as aluminum (including an aluminum alloy) and tinplate in consideration of required airtightness, corrosion resistance, water resistance, and the like.

The movable closing member (3) is entirely made of plastic,
It is formed of a metal thin plate or a composite material mainly composed of these . However, the caulking material (S) put inside due to environmental changes such as temperature and humidity during storage etc. expands and contracts, and the movable closing member (3) slides slightly in the axial direction of the trunk (1a), As a result, a gap is formed between the container body (1) and the movable closing member (3), and air or moisture enters from the gap, gas generated from the content leaks, and the content is deteriorated. There was a problem . An object of the present invention is to provide an extrusion container that solves the above-mentioned problem.

[0006]

An extrusion container according to the present invention has a cylindrical body open at both ends and is fixed to one end of the body.
A container body consisting of a closure plate and a closure plate formed on the container body
Discharge nozzle provided at a closed discharge port, and a container body
Of the short cylindrical peripheral wall that is in sliding contact with the inner peripheral surface of the
A bottom wall integrally provided at the end of the outlet nozzle,
Is slidably fitted in the container body in the axial direction.
An extrusion container comprising a movable closing member,
Between the inner peripheral surface of the torso and the outer peripheral surface of the peripheral wall of the movable closing member
To, polypropylene and one in which the sealant comprising at least a mixture of any one of polybutene and polyisobutylene are interposed.

In the above, as the polypropylene,
Atactic polymer, syndiotactic polymer,
Any of the isotactic polymers may be used. The softening point of the polypropylene used is preferably 125 ° C. or higher.

As the polybutene and polyisobutylene, those having a low to medium molecular weight are preferably used.

The mixing ratio of polypropylene to at least one of polybutene and polyisobutylene is 30 to 90 parts by weight of polybutene and at least one of polyisobutylene to 70 to 10 parts by weight of polypropylene. Good to do. The mixing ratio of both is particularly preferably 50 to 1 for polypropylene.
At least one of polybutene and polyisobutylene is 50 to 90 parts by weight with respect to 0 parts by weight.

The mixing of polypropylene with at least one of polybutene and polyisobutylene is performed by heating and melting polypropylene and mixing at least one of polybutene and polyisobutylene.

Incidentally, an appropriate antioxidant may be mixed in the sealant. In addition, a dye or a pigment may be mixed in the sealant in order to facilitate identification of a container using the sealant or to facilitate management of a coating layer.

The sealant is applied to required portions of the extrusion container by various known methods in a state of being melted by heating, and then left at room temperature or actively cooled to obtain a coating film. You.

[0013]

In the above-mentioned extruded container , the temperature and humidity at the time of storage etc.
Coke placed inside the extrusion container due to environmental changes such as temperature
The sealing material and sealant expand and contract, causing the movable closure
Even if it slides slightly in the axial direction of the container body,
Air and moisture infiltration and
Leakage of gas generated from this is prevented. In addition, the extrusion container
In manufacturing, for example, on the inner peripheral surface of the body of the container body,
Annular sealing agent on the outer peripheral surface of the peripheral wall of the movable closing member
And the caulking material was put in the container body
Later, it is only necessary to fit the movable closing member into the container body.
So the task is simplified. In addition, when extruding the contents
Moving the movable closure with a relatively small force
Can be. Also, when the polypropylene constituting the sealant acts to improve the heat resistance of the sealant and prevent sagging when the temperature rises, the temperature of the polybutene or polyisobutylene falls to room temperature or lower. Nishi
It acts to prevent the viscosity of the curing agent from increasing and hardening.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.
explain. As shown in FIG. 3, the body (1a) of the container body (1)
Between the inner peripheral surface and the outer peripheral surface of the peripheral wall (3a) of the movable closing member (3)
In addition, the sealant (4) is interposed over the entire length of the peripheral wall (3a).
It has been impatient. That is, the body (1a) of the container body (1)
On the inner peripheral surface, the axial direction of the peripheral wall (3a) of the movable closing member (3)
Loop the sealant (4) so that the width is approximately equal to the length
Apply the caulking material (S) into the container body (1)
After that, the movable closing member (3) is fitted. This and
Then, the sealant (4) is pressed inward, as shown in FIG.
The movable closing member (3) slightly outside the inner end.
You. This annular protrusion is indicated by (4a). As a sealant
Polypropylene, polybutene and polyisobut
From a mixture with at least one of styrene
Is used. In addition, as a general sealant
Is a silicone oil polyethylene substrate micro
Grease or latex of crystallin wax
Are known. However, the silicone oils described above
Is easy to apply and has a uniform coating
On the other hand, it is easy to lean at room temperature,
After the application, the movable closing member (3) is fitted into the container body (1) after application.
When inserted, the space between the container body (1) and the movable closing member (3)
The coating film collapses by flowing into and out of the container body (1) and seals
Is reduced. Moreover, inside the container body (1)
If it leaks into the caulking material (S), it
There is also the problem of quality. In addition, the above polyethylene
Grease or microcrystalline wax
Is a latex sealant at a high temperature of about 70 ° C.
Once reached, it becomes easier to drip and has the same problem as above. I
Maybe this sealant cures below room temperature
When used in an extrusion container, as described above,
The chain member (3) expands and contracts due to the expansion and contraction of the caulking material (S).
As shown in Fig. 5, when the body (1) slides slightly in the axial direction,
As shown, the protruding portion (4a) of the sealing agent (4) falls off,
Fragments are mixed into the caulking material (S) and deteriorate its function
There was a problem of letting it. Furthermore, the hardening of the sealant (4)
As the process progresses, the caulking material (S) is discharged from the tip of the discharge nozzle (2).
The maximum static friction force of the movable closing member (3) when releasing is large
Using an automatic air gun (pressure 2-3 kg / cm ² )
Manual extrusion has to be used
Therefore, there is a problem that workability is deteriorated. Hereinafter, experimental examples of the present invention will be described together with comparative experimental examples .

EXPERIMENTAL EXAMPLE 1 A low molecular weight polypropylene (softening point: 145 ° C.) was melted by heating and mixed with polybutene (kinematic viscosity at 37 ° C. 32,000).
cst), a sealant consisting of a mixture having a composition of 30% by weight of polypropylene and 70% by weight of polybutene obtained by mixing.

EXPERIMENTAL EXAMPLE 2 A sealant comprising a mixture having a composition of 10% by weight of polypropylene and 90% by weight of polybutene obtained by using the same low molecular weight polypropylene and polybutene as in Experimental Example 1.

Experimental Example 3 A low molecular weight polypropylene (softening point: 145 ° C.) was heated and melted, and polybutene (kinematic viscosity at 37 ° C .: 11600) was added thereto.
cst), a sealant consisting of a mixture having a composition of 30% by weight of polypropylene and 70% by weight of polybutene obtained by mixing.

EXPERIMENTAL EXAMPLE 4 A sealant comprising a mixture having a composition of 40% by weight of polypropylene and 60% by weight of polybutene obtained by using the same low molecular weight polypropylene and polybutene as in Experimental Example 1.

Experimental Example 5 Atactic polypropylene (softening point 125 to 165)
And a polybutene (kinematic viscosity at 37 ° C .: 32,000 cst), and a mixture comprising 70% by weight of polypropylene and 30% by weight of polybutene.

Comparative Experimental Example Sealant made of grease of polyethylene matrix microcrystalline wax.

Evaluation Tests The sealing agents of Experimental Examples 1 to 5 and Comparative Experimental Example were applied to a polyethylene plate in a molten state, allowed to cool to room temperature to form a sealing agent layer, and then heated to 80 ° C. The occurrence of sagging was observed. Table 1 shows the results.

3.14 on the upper surface of the plate made of polyethylene
After forming the sealing agent layer in the range of cm ² as described above, a plate made of polyethylene was placed thereon and left at room temperature for one day. The amount used to form the sealant layer was 0.1 g. By applying the friction coefficient test method for plastic films and sheets specified in JISK7125, a 1 kgf load was applied to the upper polyethylene plate, the plate was pulled at a speed of 100 mm / min, and the static friction force was measured. . The result is shown in FIG. Table 1 shows the static friction force when the sliding distance reached 0.3 mm.
Shown in

A sealing agent is applied to a predetermined portion of the inner peripheral surface of the body (1a) of the container body (1) by heating and melting, and is allowed to cool to room temperature to form a sealing agent layer. ), And a plastic movable closing member (3) was fitted into the body (1a). Then, after being left at room temperature for 60 days, the sliding property of the movable closing member (3) was examined. The results are summarized in Table 1.

[0024]

[Table 1]

[0025]

According to the extrusion container of the present invention, as described above, the movable closing member slides slightly in the axial direction of the body of the container body.
Even if it moves, air and water
And the leakage of gas generated from the contents is prevented.
Therefore, deterioration of the contents is prevented. In addition, the extrusion container
In manufacturing, for example, on the inner peripheral surface of the body of the container body,
Annular sealing agent on the outer peripheral surface of the peripheral wall of the movable closing member
And the caulking material was put in the container body
Later, it is only necessary to fit the movable closing member into the container body.
So the task is simplified. In addition, when extruding the contents
Moving the movable closure with a relatively small force
, The workability is excellent. Also see
At high temperatures. Therefore, the extrusion volume
Mixing vessels to the contents of a decrease in sealing performance caused by the outflow from between the container body and the movable closure member is prevented, deterioration of the contents is Ru is prevented. Further, since the curing of the sealant at a temperature lower than the room temperature is prevented, the slidability of the movable closing member is prevented from lowering. Therefore, extrusion using an automatic air gun becomes possible, and workability is improved. In addition, shea
The curing agent is prevented from curing at temperatures below room temperature, so the contents of the sealant can be repeated even if the contents inside expand and contract repeatedly due to environmental changes such as temperature and humidity during storage. incorporation into the Ru is prevented.

[Brief description of the drawings]

FIG. 1 is a graph showing a relationship between a static friction force and a sliding distance of each sealant of Experimental Examples 1 to 5 and Comparative Experimental Example .

FIG. 2 is a partially cutaway side view showing an extrusion container.

[3] In extruding container according to the present invention, it is a partially enlarged cross-sectional view of an extrusion container showing a state before fitted into the movable closure member in the container body.

[4] Also in the extrusion container according to the present invention, is a partially enlarged cross-sectional view of an extrusion container showing a state after fitted a movable closure member in the container body.

FIG. 5 is a partially enlarged cross-sectional view of an extrusion container showing a problem of a commonly used sealant.

[Explanation of symbols] (1): Container body (1a): trunk (1b): Closure plate (2): Discharge nozzle (3): movable closing member (3a): Surrounding wall (3b): Bottom wall (4): Sealant

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-50-84377 (JP, A) JP-A-63-164457 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 35/44 C08J 5/00 CES C08L 23:00

Claims (1)

(57) [Claims] 1. A cylindrical body having both ends opened and one end of the body.
Container body consisting of a fixed closure plate and closure of the container body
Discharge nozzle provided at discharge port formed in plate
And a short cylindrical peripheral wall that is in sliding contact with the inner peripheral surface of the container body.
And a bottom wall integrally provided at the discharge nozzle side end of the peripheral wall
And slidable in the container body in the axial direction.
Extruded container with movable closing member to be fitted
Outside of the inner peripheral surface of the container body and the peripheral wall of the movable closing member.
An extrusion container in which a sealant made of a mixture of polypropylene and at least one of polybutene and polyisobutylene is interposed between the peripheral surface and the peripheral surface .