Writing instrument
一种书写用具、书写部的技术,应用在书写器具、书写连接器、笔尖等方向,能够解决不易获得、墨引导管复杂、不能确保可识别性等问题,达到耐久性优异、可识别性优异的效果
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[0158] Next, the present invention will be described in further detail with reference to examples, but the present invention should not be limited to the examples shown below.
[0159] Next, the present invention will be described in further detail with reference to Examples and Comparative Examples, but the present invention should not be limited to the Examples shown below.
[0160] Test Example 1: Examples 1 to 4 and Comparative Examples 1 to 6.
[0161] Writing utensils and inks equipped with pen nibs having the following compositions were used. Table 1 below and Figure 23 The respective dimensions shown in are used for the dimensions of the porous member as the writing portion, the holding member, and the ink guide portion constituting each nib. Common components are used for the components of the writing utensil except for the nib and ink.
[0162] Composition of the nib:
[0163] Porous member of writing part: sintered core made of PE, porosity: 60%
[0164] Holdi...
Embodiment 5 to 7 and comparative example 7 to 8
[0202] In Test Example 2, the writing part porous member and the holding member were bonded by changing the bonding surface shape, bonding surface size, and bonding surface shortest length to evaluate bonding strength and sealing performance by the following evaluation methods. The evaluation results thereof are shown in Table 2 below.
[0203] A writing implement equipped with the nib used in Example 1 above and prepared by the following method was used. The writing portion porous member was attached to the holding member by the following method.
[0204] The relay porous member and the writing portion porous member are bonded by impregnating them with an organic solvent in a state where they are temporarily inserted into the holding member and then drying them.
[0205] Then the evaluation method of strength:
[0206] The bonded writing portion porous member was peeled off with a hand covered with a rubber glove and evaluated according to the following evaluation criteria....
Embodiment 8 to 10 and comparative example 9 to 10
[0221] In Test Example 3, the adhesive strength and sealing performance depending on the thickness of the resin layer of the holding member were evaluated by the above-mentioned evaluation method. The evaluation results thereof are shown in Table 3 below.
[0222] A writing implement equipped with the nib used in the above-mentioned Example 1 and prepared by the same method as in the above-mentioned Test Example 2 except that only the thickness of the resin layer of the holding member was changed was used.
[0223] table 3
[0224]
[0225] As already clear from the results of the above Table 3, compared with the writing implements in Comparative Examples 9 to 10 outside the scope of the present invention, in Examples 8 to 10 falling within the scope of the present invention, the writing implements in the following Excellent in both strength and sealing performance. When the thickness of the holding member resin layer is less than 1 μm, the holding member resin layer cann...
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