JP2002058663A - Plug for vacuum specimen sampling container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug for a vacuum specimen sampling container, which can be plugged in to the specimen sampling container by hand work. SOLUTION: A small diameter leg part 12 is suspended from the head top part 11 of the main body 1 made of a hard synthetic resin. An elastic ring shape body 2 made of a material that 0.1-5.0 wt.% of lubricant is added to a thermoplastic elastomer 100 wt.% is fixed to the leg part 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a plug for a vacuum sample collection container.

[0002]

2. Description of the Related Art Conventionally, a sample collection container in which a small-diameter leg is suspended from the top of a rigid synthetic resin body at the opening of the sample collection container, and a soft elastomer layer is formed on the outer peripheral surface of the leg. Japanese Patent Application Laid-Open No. 10-201742 discloses, for example, a method of detachably inserting a stopper body and sealing the stopper.

[0003]

However, in such a plug for a vacuum sample collection container, since the frictional resistance of the soft elastomer is large, the plug is manually inserted into the sample collection container. There was a problem that was difficult.

[0004] It is an object of the present invention to solve the above-mentioned conventional problems and to provide a plug for a vacuum sample collection container, which can easily and manually plug the plug into the sample collection container.

[0005]

In the plug for a vacuum sample collection container according to the present invention, a small-diameter leg is vertically provided from the top of a hard synthetic resin main body, and no lubricant is contained in 100 parts by weight of a thermoplastic elastomer. The elastic annular body added with 0.1 to 5.0 parts by weight is fixed to the leg.

In the plug for a vacuum sample collection container of the present invention,
The shape of the hard synthetic resin body is not particularly limited, but it is preferably a substantially bottomed cylindrical shape so that it can be securely gripped with a fingertip when plugging and unplugging, and a parallel line is formed on the peripheral wall. It is preferable that irregularities for non-slip such as shapes and oblique lattices are carved.

[0007] A circular through-hole is formed in the center of the main body, and a needle tube for sample collection can be pierced through the through-hole. When the needle tube is withdrawn, a needle hole penetrated therethrough is formed. A thermoplastic elastomer rod is tightly fitted to reclose. The circular rod may close the upper surface of the elastic annular body with a plate-shaped lid, and may be integrally provided on the upper surface of the lid or on both upper and lower surfaces.

In the stopper for a vacuum sample collection container according to the present invention,
The hard synthetic resin used for the main body is not particularly limited, and for example, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyamide (P
A), polycarbonate (PC), polyacetal (P
OM) and the like, and a synthetic resin having a high gas barrier property is preferable.

In the plug for a vacuum sample collection container according to the present invention,
The shape of the elastic annular body is not particularly limited as long as it can be fixed to the outer peripheral surface of the leg portion. For example, the shape may be a narrow band shape or a substantially U-shaped cross section. It is preferable that the latter is difficult to be easily removed from the legs when the sample is removed from the sample collection container by being inserted into the concave groove.

In the plug for a vacuum sample collection container according to the present invention,
The thermoplastic elastomer used for the elastic annular body is not particularly limited, and is, for example, a polyester-based thermoplastic elastomer (TPEE), a urethane-based thermoplastic elastomer (TPU), or a polyamide-based thermoplastic elastomer (TP).
EA), olefin-based thermoplastic elastomer (TPO)
And the like.

The combination of the hard synthetic resin used for the main body and the thermoplastic elastomer used for the elastic ring is selected so as to have good mutual adhesion.

In the plug for a vacuum sample collection container of the present invention,
The lubricant added to the thermoplastic elastomer is not particularly limited, for example, fatty acid-based lubricant, higher alcohol-based lubricant,
Examples include amide-based lubricants and ester-based lubricants.

Examples of the fatty acid-based lubricant include stearic acid and 12-hydroxystearic acid. Examples of the higher alcohol-based lubricant include stearyl alcohol, cetyl alcohol and the like.

Examples of the amide-based lubricant include fatty acid amides such as stearic acid amide, oleic acid amide, erucic acid amide, and palmitic acid amide; Alkylene bis fatty acid amides can be mentioned.

Examples of the ester lubricant include butyl stearate, stearyl stearate, cetyl palmitate, monoglyceride stearate, monoglyceride oleate, monoglyceride ricinoleate, and pentaerythritol tetrastearate.

In the plug for a vacuum sample collection container according to the present invention,
The amount of the lubricant added to 100 parts by weight of the thermoplastic elastomer used for the elastic ring is 0.1 to 5.0 parts by weight. If the amount is less than 0.1 part by weight, the effect of reducing the stopper resistance is not exhibited. If the amount is more than 5.0 parts by weight, the flexibility, strength and moldability of the thermoplastic elastomer are reduced, and the hard synthetic resin and This is because the fixing force with the plastic elastomer decreases.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view showing a cross section of an example of the plug for a vacuum sample collection container of the present invention.

[Embodiment 1] In the stopper for a vacuum sample collection container according to the present invention shown in FIG. 1, reference numeral 1 denotes a main body made of PBT, which has a small diameter from a top 11 having a substantially bottomed cylindrical shape. A leg 12 is vertically provided, and a circular through hole 13 is formed in the center of the crown 11.

Reference numeral 2 denotes an elastic annular body in which 0.5 part by weight of a fatty acid amide is added to 100 parts by weight of a polyester-based thermoplastic elastomer.
A substantially circular bar-shaped projection 22 is provided on the upper and lower surfaces of the center of the lid 21.

The annular body 2 has a circumferential concave groove which opens upward.
23 is engraved and has a substantially U-shaped cross section. Ring 2
The leg 12 of the main body 1 is inserted into the concave groove 23 of the main body 1 and the projection 22 is
The annular body 2 is fixed to the outer peripheral surface of the leg 12.

A plug 1 having an elastic annular body 2 fixed to the outer peripheral surface
When the leg portion 12 is pressed into the opening of the substantially test tubular sample collection container having a diameter slightly smaller than the outer diameter of the elastic annular body 2, a lubricant having a small frictional resistance is added to the elastic annular body 2. Therefore, the tapping resistance value is reduced.

After the press-fitting, the outer peripheral wall of the elastic annular body 2 is brought into close contact with the inner peripheral wall of the opening of the sample collection container by the restoring force of the compressed elastic annular body 2, and the sample collection container is sealed with a stopper. You.

The above stopper resistance value means that a PET sample collection container having a substantially bottomed cylindrical shape whose edge is cut off at a right angle in the axial direction and whose bottom is substantially hemispherical is formed by an LRX type material testing machine. It is fixed with the lower chuck, a stopper having the same outer diameter as the inner diameter of the sample collection container is lightly placed on the opening, and the plug is pressed into the sample collection container at a compression speed of 200 mm / min on the flat portion of the upper chuck. It means the maximum resistance value measured from the start to the completion of press-fitting.

Example 2 This example is the same as Example 1 except that 1 part by weight of the fatty acid amide was added to 100 parts by weight of the polyester-based thermoplastic elastomer used for the elastic ring. Omitted.

Comparative Example 1 The description is omitted because it is the same as Example 1 except that the fatty acid amide is not added to the polyester-based thermoplastic elastomer used for the elastic ring.

Comparative Example 2 The procedure of Example 1 was repeated except that 0.05 part by weight of the fatty acid amide was added to 100 parts by weight of the polyester-based thermoplastic elastomer used for the elastic ring. The description is omitted.

Comparative Example 3 When 7 parts by weight of the fatty acid amide was added to 100 parts by weight of the polyester-based thermoplastic elastomer TPEE, the moldability deteriorated and an elastic ring could not be formed.

With respect to the plugs of Examples 1 and 2 and Comparative Examples 1 and 2, tapping resistance was measured using an LRX type material tester manufactured by LLOYD. Table 1 summarizes the measurement results.

[0029]

[Table 1]

As is clear from Table 1, the plug of the embodiment is
The plugging resistance value is significantly reduced as compared with the plug of the comparative example, and the plugging by hand can be easily performed.

[0031]

Since the stopper for a vacuum sample collection container of the present invention is configured as described above, the stopper can be easily inserted into the sample collection container by manual operation.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a cross section of an example of a plug for a vacuum sample collection container according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Elastic annular body 11 Top part 12 Leg part 13 Through-hole 21 Plate-shaped lid part 22 Projection 23 Groove

Claims (1)

[Claims] 1. An elastic annular body having a small-diameter leg suspended from the top of a rigid synthetic resin body and having 0.1 to 5.0 parts by weight of a lubricant added to 100 parts by weight of a thermoplastic elastomer. A plug for a vacuum sample collection container, which is fixed to a part.