JPH06134899A - Aluminum tray for measuring non-volatile component of aqueous resin, and aluminum tray molding machine - Google Patents

Abstract

PURPOSE:To secure a anity of the wt. of a sample by molding aluminum foil permitting an aqueous resin sample to spread in an almost uniform planar state without repelling the sample. CONSTITUTION:Aluminum foil permitting a sample of an aqueous resin (e.g; an acrylic emulsion, polyacrylic acid) to spread in an almost uniform planar state without repelling the sample is molded. In this case, a recessed mold 1 is provided on a stand 2 so that the opening thereof is turned upwardly and the aluminum foil permitting the aqueous resin to spread in almost uniform planar state without repelling the same is placed on the recessed mold 1 and the up-and-down movable projected mold 4 fitted in the recessed mold 1 is moved up and down to be fitted in the recessed mold 1 to form an aluminum tray. By this constitution, the repellency of liquid sample is eliminated when the non-volatile component of the aqueous resin is measured and the wt. of the sample can be easily made constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum dish and an aluminum dish molding machine for measuring the non-volatile content of a water-based resin. More specifically, the present invention relates to an aluminum dish that can be easily constant weighted when measuring non-volatile components, and an aluminum dish molding machine with high molding efficiency.

[0002]

BACKGROUND OF THE INVENTION One of the quality inspection items for water-based resins is the nonvolatile content value. This non-volatile content value is measured by placing a sample in a container, heating it at a constant temperature for a predetermined time, and then measuring it.

Conventionally, a commercially available aluminum dish was used for this container, but in this case, when a sample is placed in the commercially available aluminum dish, it may not be dispersed in a uniform plane, and a hill-like bulge may occur. . When the sample swelled like a mountain, the volatile component was not completely volatilized, so that the constant amount was not easily obtained, and there was a problem that an analysis error occurred. For this reason, there has been a demand for a non-volatile content measuring aluminum dish that can be easily made constant.

On the other hand, as a method of forming the above-mentioned aluminum dish, a method of forming the aluminum foil into a dish shape by hand and a method of pressing the aluminum foil into it using a mold such as a rubber stopper and folding it by hand are considered. However, these methods are time consuming, mass production cannot be expected, and if the aluminum tray is not molded well, the sample will spill, or the sample will enter between the folds and the heating of that part will be insufficient and constant weighting will not be achieved. There is a problem that there is no. Further, the rubber mold also has a problem of poor releasability, and an aluminum dish molding machine that solves these problems has been desired.

[0005]

OBJECTS OF THE INVENTION Accordingly, it is an object of the present invention to provide an aluminum dish which can be easily constant weighted, and secondly
To provide an aluminum dish forming machine with good work efficiency.

[0006]

[Means for Solving the Problems] The first object is to provide an aluminum dish for measuring the non-volatile content of a water-based resin obtained by molding an aluminum foil that spreads in a substantially uniform plane without repelling the water-based resin sample. It was found to be achieved. That is, the commercially available aluminum dish did not achieve constant weighting, but the use of the aluminum foil found by the present inventor eliminated the repellency of the liquid sample and achieved constant weighting.

A second object is to provide a concave mold on the pedestal with the opening facing upward, and to mount an aluminum foil spread on the concave mold opening in a uniform plane without repelling the aqueous resin sample,
It has been found that this can be achieved by an aluminum dish molding machine characterized in that a vertically movable convex mold that fits with the concave mold is provided.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be specifically described below.

In the present invention, the aqueous resin includes a water-dispersible resin such as acrylic emulsion, styrene-butadiene rubber and methylmethacrylate-butadiene rubber, and a water-soluble resin such as polyacrylic acid.

The aluminum foil used in the present invention has the property that the water-based resin sample spreads in a substantially uniform plane without being repelled.

The size of the aluminum foil is not particularly limited,
It is preferably 10 × 10 cm. The thickness of the aluminum foil is preferably 10 to 20 μm, more preferably 1
It is 0 to 15 μm.

The contact angle θ of the aqueous resin sample when the aluminum foil of the present invention is used is preferably θ = 60 to 70 degrees in the low viscosity range (18 to 500 CP).

The contact angle θ can be measured by dropping a small amount of the sample on the aluminum foil and measuring the angle of the contact surface between the aluminum foil and the sample with a contact angle measuring device.

Next, an example of the aluminum dish forming machine of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic front view showing an example of the aluminum dish molding machine of the present invention, and FIG. 2 is a schematic side view showing an example of the aluminum dish molding machine of the present invention.

Reference numeral 1 is a concave type, and is fitted on a pedestal 2 with its opening facing upward. 3 is a stand on which the aluminum foil is placed. When the aluminum foil is placed on the table 3 on which the aluminum foil is placed, the opening of the concave mold 1 is just closed.

Reference numeral 4 is a convex mold that fits with the concave mold 1 and is movable up and down. Although the mode in which it can move up and down is not limited, a preferred mode will be described with reference to the drawings. In the figure, 5 is a stanchion fixed to the pedestal 2, and a guide 6 is provided upright in the center of the stanchion 5. A support portion 8 is provided via an arm portion 7 which is fitted with the guide 6 and is vertically movable. The convex mold 4 is attached below the supporting portion 8 via a coupler-type attaching jig 9. As the coupler type attachment jig 9, for example, an auto joint XM-5
(Product name, manufactured by Sunrise Trading Co., Ltd.) can be used.

The upper portion of the supporting portion 8 is fixed to the constant load spiral spring 10. Reference numeral 11 denotes a grip bar, and the convex mold 4 can be moved downward by pulling the grip bar 11 downward. However, when the grip bar 11 is released, the convex mold 4 returns to its original position by spring elasticity. This constant force spiral spring can always be pulled with a constant force regardless of the length to be pulled.

According to the above aspect, the concave mold 1 and the convex mold 4 can be easily replaced by a fitting jig and a coupler fitting jig, respectively, so that various types of aluminum dishes can be molded.

The material of the molding machine may be different depending on the respective constituent parts, but it is preferable that it is resinous, and it is more lightweight because it is composed of unsaturated polyester resin for almost all constituent parts. It is preferable because it can be made compact, desktop and easy to move. In particular, by forming the concave type and the convex type with an unsaturated polyester resin, the peelability of the finished aluminum dish is better than that of rubber, and it is stronger than that of glass and is also lighter in weight.

As a method of using the above-mentioned molding machine, 10 × 10 cm of aluminum foil is placed on a table 3 on which the aluminum foil is placed, the grip bar 11 is grasped, the convex mold 4 is pulled downward, and pushed to the bottom of the concave mold 1. . Then release the grip bar 11 and the convex type 4
Is pulled upward by the elastic force of the constant load spiral spring 10. Next, the aluminum dish formed in the concave mold 1 is taken out.

As another aspect of the above embodiment, the constant load spiral spring 10 can be changed to a constant load tension spring or the like.
Further, instead of the spring force, a gear or the like can be used to automatically move up and down. Further, a method of reversing the positions of the convex mold 4 and the concave mold 1, fixing the convex mold, and moving the concave mold up and down is also conceivable.

In the above embodiment, the base 3 for mounting the aluminum foil on which the aluminum foil is mounted is provided, but this is not always necessary, and the aluminum foil can be directly mounted on the concave mold 1.

[0024]

【Example】

Example 1 An aluminum dish was manufactured from an aluminum foil using the molding machine shown in FIGS. 1 and 2, and a nonvolatile sample (N
V value) was measured. For comparison, the NV value was similarly measured using a commercially available aluminum dish (manufactured by Toyo Echo Co., Ltd., product number 107). The contact angle θ is an average value of values measured twice by using a goniometer type contact angle measuring instrument GI type manufactured by Elma.

The results are shown in Table 1.

[0026]

[Table 1] (Note) 1 is ALMATEX SPMM47BF (trade name,
Mitsui Toatsu Chemical Co., Ltd. 2 is Polylac 760A (trade name, manufactured by Mitsui Toatsu Chemical Co., Ltd.) 3 is Structbond 5028 (trade name, manufactured by Mitsui Toatsu Chemical Co., Ltd.) It can be seen that the aluminum dish of No. 1 does not repel any of the samples, and it is easy to make a constant weight.

On the other hand, the comparative commercial aluminum dish has a drawback that the NV value becomes high in the case of the low-viscosity sample 1, and the NV value varies in the high-viscosity sample 3.

Example 2 The NV value was measured using an aluminum dish molded by the aluminum dish molding machine of the present invention, and a sample capable of constant weighting was confirmed by an experiment.

As a result, it is possible to make constant for samples of acrylic emulsion, styrene butadiene rubber, methyl methacrylate butadiene rubber, polyacrylic acid, etc. as brands, and all of them can obtain NV values with little error for aqueous samples. .

For comparison, a commercially available aluminum dish is used.
As a result of an experiment on each of the above-mentioned samples, it was found that the samples tend to repel in the low viscosity region.

[0031]

EFFECTS OF THE INVENTION According to the present invention, firstly, an aluminum dish can be provided which can be easily subjected to constant weighting when measuring an NV value.
It is possible to obtain an aluminum plate with good work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an example of an aluminum dish molding machine of the present invention.

FIG. 2 is a schematic side view showing an example of the aluminum dish molding machine of the present invention.

[Explanation of symbols]

 1: Concave type 2: Frame 3: Stand on which aluminum foil is placed 4: Convex type 5: Stance 6: Guide 7: Arm 8: Support 9: Coupler type mounting jig 10: Constant load spiral spring 11: Grip bar

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Atsuko Furuyama 1900 Togo, Mobara-shi, Chiba Mitsui Toatsu Chemical Co., Ltd. (72) Inventor Mariina Kawakami 1900 Togo, Mobara-shi, Chiba Mitsui Toatsu Chemical Co., Ltd.

Claims (2)

[Claims] 1. An aluminum dish for measuring the non-volatile content of a water-based resin obtained by molding an aluminum foil, which is spread in a substantially uniform plane without the water-based resin sample being repelled. 2. A concave mold is provided on a pedestal with an opening directed upward.
An aluminum dish, characterized in that an aluminum foil that spreads in a uniform plane without being repelled by an aqueous resin sample is placed in the concave opening, and a vertically movable convex mold that fits with the concave mold is provided. Molding machine.