受験番号：32IPC010

Q1[Background Art]
[0002]
Thermoplastic resins, in particular, engineering
plastics such as PBT resins, ABS resins, and nylon resins arewidely used for, for example, electric and electroniccomponents and automobile components. For electroniccomponents, blending of metal fibers into various resins has
been recently studied to provide electromagnetic shielding
materials for the purpose of preventing interference fromelectromagnetic waves and the like. PBT resins and the likeare also expected to be used in applications that require
electromagnetic shielding properties in, for example,
automobile electrical components exposed to high-temperatureand low-temperature atmospheres by taking advantage of their
thermal stability. However, as a result of evaluation
performed by the present inventors for conductivity and the likeby blending various metal fibers into thermoplastic resins, thepresent inventors have found that the conductivity is excellent
at the initial stage, but the electromagnetic shielding
properties deteriorate when thermal shock at high temperatureand low temperature is repeated. In this state, it is difficult
to use such a material in consideration of exposure tohigh-temperature and low-temperature atmospheres undervarious practical conditions. Therefore, it is desired toprovide an electromagnetic shielding material that solves thisproblem and takes advantege of the excellent properties
inherent in thermoplastic resins.
Q2[0014]For aluminum alloys, in particular, alloys called
heat-treated alloys, heat treatment such as solution treatment
and aging treatment represented by T6 treatment is performed

to improve the characteristics such as strength. Precipitates
produced by the aging treatment and crystallized products
produced during casting include those that are dissolved by atreatment liquid used for anodic oxidation treatment andintermetallic compounds and metal elements that are notdissolved by the treatment liquid, but has conductivity.
Therefore, the following is considered. A material in which
precipitates or crystallized products are sufficiently madepresent by performing heat treatment such as solution treatment
and aging treatment or adjusting casting conditions before
anodic oxidation treatment is provided and subjected topretreatment such as etching to make the precipitates or thelike present on a surface layer of the material. As a result,the precipitates or the crystallized products are dissolved
during anodic oxidation treatment or an anodized layer is notformed on the precipitates or the crystallized products,
whereby an anodized layer having through-holes that reach a basematerial can be formed.
Q3Hereafter, the present invention will be described indetail with reference to Examples.
Table 1 shows chemical compositions of various steel
materials together with those of comparative samples. Samples
A, B, and C correspond to steel materials according to thepresent invention, and samples D to F are shown for comparison.
For the samples A to D, heat treatment was performed suchthat the samples were held at 820°C for 22 hours, thenwater-cooled, and tempered while being held at 600°C for 40hours.
The reason why tempering was performed on the samples Eand F twice is as follows. When the chromium content is 1% or
more, austenite is not completely transformed into amartensitic microstructure at 840°C. Therefore, retained
austenite is completely transformed in the first tempering, andthe second tempering is performed to achieve good mechanicalproperties.
In other words, it is found that the Cr content needs tobe 0.4% or less to achieve an FATT increase of 5°C or less andembrittlement substantially does not occur particularly at aCr content of 0.25% or less.
The above-described test revealed that embrittlement
substantially did not occur particularly at a chromium contentof 0.25% or less. Therefore, the degree of embrittlement after
long-term treatment was actually confirmed by performing a
constant-temperature embrittlement test.
Q4
1. An immunochromatographic test kit comprising:first and second reagents that immunologically react witha substance to be analyzed; anda membrane carrier,wherein the first reagent is immobilized in advance ata predetermined position of the membrane carrier to form acapturing site for capturing the substance to be analyzed, andthe second reagent is labeled in advance with metal
colloid particles on which a platinum colloid has been carried
and is disposed on the membrane carrier so as to be away fromthe capturing site, thereby allowing chromatographic
development.
2. The immunochromatographic test kit according to claim
1, further comprising a sensitizer solution containing copper
ions,
wherein the sensitizer solution is brought into contact
with the capturing site after chromatographic development, andthe copper ions are reduced on the metal colloid particles ofthe second reagent, thereby precipitating copper.
3. The immunochromatographic test kit according to claim

2, further comprising a protective layer-forming liquid thatis brought into contact with a portion in which the copper has
been precipitated, thereby covering the portion.
4. The immunochromatographic test kit according to claim
2 or 3, wherein the sensitizer solution contains copper sulfate
and a reducing agent.
5. The immunochromatographic test kit according to claim
3 or 4, wherein the protective layer-forming liquid contains
glycerol or derivatives thereof.