JPH0723734Y2 - Equipment for measuring odor components such as packaging materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an apparatus for measuring residual odorous component gas such as an organic solvent in a packaging material sample in an atmosphere containing an organic solvent during printing.

<Prior Art> Conventionally, a method using an odor bottle has been generally used as a method for measuring a residual odor component of a packaging material sample or the like. That is,
Put a suitable amount of the packaging material sample into a glass bottle with an internal volume of about 100 to 200 ml, which has a metal lid with packing such as silicone rubber, and tightly stopper it.After a certain time at a certain temperature, the residual odorous components are sufficient. A small amount of the gas phase gas diffused in the glass bottle is sucked and the concentration is measured by the gas chromatography method to estimate the amount of residual odorous components such as the packaging material sample.

Further, as another quick and simple method for measuring the residual odor component of a packaging material sample or the like, there is a method of using an odor diffusion box incorporating a metal oxide semiconductor sensor or the like as shown in FIG. That is, the sample inlet (20) with a closed structure, which is made of plastic, glass, or metal having a low adsorbability of odor component gas, the recess (14) in which a semiconductor sensor or the like is installed, the gas phase having a temperature control function Using a odor diffusion box with an internal volume of about 200 to 400 ml equipped with a gas circulation device (19), put an appropriate amount of packaging material sample, etc. and seal it, and force the residual odor component for a certain time at a certain temperature. The concentration of the vapor-phase gas that has diffused physically is immediately measured by a semiconductor method or the like.

<Problems to be solved by the invention> Recently, trace amounts of residual odor components such as organic solvents at the time of printing or laminating often become a problem in packaging materials such as paper or resin films, and the odor bottle or In the measurement method using an odor diffusion box, it is difficult to replace fresh air in the odor bottle or the odor diffusion box when the packaging material sample is put in the organic solvent atmosphere during printing, etc. An error occurs in the concentration measurement of the gas phase gas diffused from the material sample piece,
It is difficult to control the quality of a small amount of residual odor components such as packaging materials.

<Means for Solving the Problems> As shown in FIGS. 1 and 2, the present invention is directed to a surface of an inner cylinder (12) such as a cylindrical body or a rectangular parallelepiped body and a floor surface body (or side surface body,
A structure in which the inner surface of an outer cylinder (15) such as a cylindrical body or a rectangular parallelepiped body with a ceiling body is airtightly meshed in a movable state, and an internal void portion formed by the movement of the inner cylinder or the outer cylinder. By providing a gas-phase gas inlet / outlet (13), a recess (14) for installing a semiconductor sensor, etc., and a recess (11) for placing a sample piece, etc., in an atmosphere containing an organic solvent such as during printing. The odor of the packaging material, etc. can be measured easily with a small error by facilitating the replacement of the packaging material sample with fresh air at the time of introduction and measuring the concentration of a small amount of gas phase gas diffused from the packaging material sample, etc. A component measuring device is provided.

The inner cylinder (12) and the outer cylinder (15) of the present invention are made of plastic such as Teflon resin or polyethylene terephthalate resin, glass, or chrome-plated metal that has low adsorption of odorous component gases such as organic solvents. A used structure such as a columnar shape (and a cylinder with a floor surface body or the like) or a rectangular columnar body (and a rectangular parallelepiped body with a floor surface body or the like), the inner cylinder (12) or the outer cylinder ( The volume of the internal void, which can be created by moving 15), is made to be about 200-400 ml.

The degree of airtightness of the surface of the inner cylinder (12) and the inner surface of the outer cylinder (15) of the present invention is about 0.01 mm when the inner cylinder and the outer cylinder are engaged in a movable state, and the meshing dimensional accuracy of the structure It may be manufactured so as to have surface smoothness. That is, since the internal cavity of the present invention has the gas phase gas intake / exhaust port (13), there is no pressure difference with the outside, and the gas phase gas can be prevented from leaking. In this case, use of lubricating oil, grease, or the like in the meshing portion causes an error in the measurement of the concentration of the gas phase gas, so caution is required.

In addition, the inner cylinder (12) or the outer cylinder (15) of the present invention has a scale (16) indicating the volume of the internal cavity formed by the movement of the inner cylinder or the outer cylinder, and the inner cylinder and the outer cylinder at fixed positions. It is necessary to provide a fixing tool (17) such as a thumbscrew for fixing (fixed volume).

The gas-phase gas intake / exhaust port (13) of the present invention is made of the same material as the inner cylinder (12) and the outer cylinder (15) and has an inner diameter of 2 to 5 mm and a length of 2 to 5 cm.
One tube is provided in the internal space by using a tube of a certain size. In this case, the valve or the valve is not used because it causes a measurement error, and the gas-phase gas intake / exhaust port (13) is sealed with a silicone rubber stopper (18).

A recess (14) for mounting a semiconductor sensor or the like provided in the internal void portion of the present invention and a recess (11) for placing a sample piece or the like.
Is a size suitable for the shape of semiconductor sensors, sample pieces, etc., and it is necessary to minimize the volume in order to facilitate replacement with fresh air when the packaging material sample pieces, etc. are introduced. is there. Further, in the internal void portion of the present invention, a gas phase gas circulation device (19, micro fan) having a temperature control function may be provided in order to facilitate diffusion of residual odorous components such as packaging material sample pieces. desirable.

<Operation> The method of using the device for measuring odorous components such as packaging materials of the present invention is to collect a packaging material sample during printing in an atmosphere containing an organic solvent such as a printing room and cut it to a certain size (or a certain weight). Insert the sample piece into the recess for placing the sample piece, etc., with the inner cylinder or outer cylinder moved and the meshing open, and then with the inner cylinder and outer cylinder meshed again, Move the inner cylinder or outer cylinder so that the volume of the part becomes zero, discharge all the air containing the organic solvent in the inner cavity, and then use fresh air prepared separately in a clean bag etc. to clean the inner cylinder or outer cylinder. By moving it, a certain amount is sucked and replaced from the gas phase gas intake / exhaust port.

The movement of the inner cylinder or the outer cylinder of the present invention serves both to discharge the organic solvent-containing air in the internal cavity and to operate the metering pump for sucking in fresh air. And inhalation are repeated several times, such as a recess for placing a semiconductor sensor and a recess for placing a sample piece,
After completely replacing the remaining organic solvent-containing air with fresh air, set a certain volume of the internal cavity with the scale and fixing tool described above, and seal the gas-phase gas intake / exhaust port with a silicone rubber stopper, etc. To do.

<Example 1> As shown in FIG. 1, a cylindrical inner cylinder (12) of 120 mm high x 90 mm outer diameter having a recess (11,5 mm deep, 80 mm inner diameter) for placing a sample piece or the like on the upper part, , With a ceiling body that has a gas phase gas inlet / outlet (13,3 mm inner diameter, 40 mm length) and a recess (14,20 mm deep, 35 mm inner diameter) for installing semiconductor sensors, etc. inside the upper part
A cylindrical outer cylinder (15) with a height of 120 mm and an inner diameter of 90 mm is fitted into the outer cylinder (15) by airtightly meshing the surface of the lower inner cylinder (12) with the inner surface of the upper outer cylinder (15). ) Is movable up and down, Teflon resin was cut to prepare an odor component measuring device such as a packaging material.

Next, a scale (16) showing the volume of the internal space and a fixture (17) for the brass inner and outer cylinders are provided on the inner cylinder (12) of the measuring device to introduce and exhaust gas phase gas. A silicone rubber stopper (18) for sealing (13) was prepared.

The method of using the device for measuring odorous components such as packaging materials of the present embodiment is as follows. First, the outer cylinder (15) is lifted by hand to release the engagement with the inner cylinder (12), and the packaging material sample collected by the above-mentioned method. Insert the piece into the recess (11) for placing the sample piece, etc., again engage the outer cylinder (15) with the inner cylinder (12) and push it down by hand to fully remove the air containing the organic solvent in the inner cavity. After discharging, then fresh air prepared separately in a clean Teflon resin bag is connected to the gas-phase gas intake / exhaust port (13) and the outer cylinder (15) is lifted by hand to create an internal cavity. 400 ml (about 6 cm, according to scale 16)
After inhaling and fixing the inner cylinder and the outer cylinder with a fixture (17), the gas-phase gas intake / exhaust port (13) is sealed with a silicone rubber plug (18).

<Embodiment 2> As shown in FIG. 2, a cylindrical outer cylinder with a floor surface body having a concave portion (11) for placing a sample piece and the like in the lower portion and a gas phase gas inlet / outlet port (13) ( 15), a cylindrical inner cylinder (12) having a recess (14) for installing a semiconductor sensor and the like and a gas phase gas circulation device (19) having a temperature control function, and an outer cylinder (15) located below ) And the surface of the upper inner cylinder (12) are airtightly meshed with each other so that the inner cylinder (12) can move up and down. Then, the Teflon resin was cut to produce an odor component measuring device such as a packaging material.

Next, a scale (16) indicating the volume of the internal space is provided on the inner tube (12) of the measuring device, and a fixture (17) for brass inner tube and outer tube is provided on the outer tube (15) of the measuring device. Then, in the same manner as in Example 1, after exhausting all the organic solvent-containing air in the internal cavity, sucking 400 ml of fresh air into the internal cavity, and fixing the inner cylinder (12) of the measuring device, The gas phase gas inlet / outlet (13) was closed.

In the present Example 2, in order to completely replace the fresh air, the above-mentioned discharge and inhalation were repeated several times, and in order to facilitate the diffusion of the residual odorous components such as the packaging material sample pieces, The gas phase gas circulation device (19) having a control function is operated to perform a more rapid and accurate gas phase gas concentration measurement.

<Effect> As described above, the device for measuring odorous components such as packaging materials of the present invention is
It is easy to replace the packaging material sample with fresh air when the packaging material sample is put in an atmosphere containing organic solvent during printing (it was conventionally transported to a measurement room with fresh air). Therefore, after sampling a sample of packaging material during printing, it is possible to diffuse the odorous components held under the same conditions (replacement air, temperature, time) in the vapor phase, and trace amount of residual odorous components such as packaging material sample. It improves the accuracy of gas concentration measurement.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention. FIG. 1 is an explanatory view according to the first embodiment of the present invention, and FIG. 2 is an explanatory view according to a second embodiment of the present invention. Is. Further, FIG. 3 is an explanatory diagram relating to a conventional technique of the present invention, that is, a method of using an odor diffusion box. 11 …… Concave for placing sample etc. 12 …… Inner cylinder of measuring device 13 …… Intake / exhaust port for gas phase gas 14 …… Concave for mounting semiconductor sensor 15 …… Outer cylinder of measuring device 16 …… Scale indicating the volume of the internal void 17 …… Fixing tool for inner and outer cylinders (such as thumbscrew) 18 …… Silicone rubber stopper 19 …… Gas-phase gas circulation device (ultra-small fan) 20 …… With closed structure Sample inlet

Claims (1)

[Scope of utility model registration request] 1. A surface of an inner cylinder having a cylindrical shape or a rectangular parallelepiped body,
A structure in which the inner surface of an outer cylinder such as a cylindrical or rectangular parallelepiped body with a floor surface body (or side surface body, ceiling body) is movably and airtightly engaged, and the inner cylinder or outer cylinder moves An apparatus for measuring an odor component such as a packaging material, characterized in that it has a concave portion for placing a gas phase gas intake / exhaust port, a semiconductor sensor, etc., and a concave portion for placing a sample piece, etc. in the internal cavity.