Cleaning balde for use in image-forming apparatus
A technology for cleaning scrapers and imaging devices, which is applied in the fields of instruments, electrography, optics, etc., and can solve problems such as the impossibility of cleaning scrapers
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Examples
preparation example Construction
[0165] The preparation process of the thermosetting elastomer composition used in the present invention is as follows:
[0166] First, the rubber component (1) and the filler (2) are kneaded at a temperature of 80 to 120°C using a kneading device such as a single-screw extruder, 1.5-screw extruder, twin-screw extruder, open roll mill, kneading machine, Banbury mixer or heated roll mill kneading for 5 to 6 minutes. If the kneading temperature is lower than 80° C., and the kneading time is less than 5 minutes, the rubber component (1) is insufficiently plasticized and the mixture is not sufficiently kneaded. If the kneading temperature is more than 120° C., and the kneading time is more than 6 minutes, the rubber component (1) may decompose.
[0167] After adding the crosslinking agent (3) to the prepared mixture, it is kneaded at 80 to 90° C. for 5 to 6 minutes using the above-mentioned kneading equipment. If the kneading temperature is lower than 80° C. and the kneading time...
Embodiment
[0201] Examples and comparative examples of the present invention are described below.
[0202] Examples 1 to 18 and Comparative Examples 1 to 8 are as follows.
[0203] Measure the mixing amount of various rubber components (1) and fillers (2a, 2b) as shown in Table 1 to Table 3, then rubber components (1) and fillers (2a, 2b) are added to rubber kneading equipment such as double Screw extruder, open roll mill, or Banbury mixer. Then, it is kneaded at a temperature of 80 to 120° C. for 5 to 6 minutes.
[0204] The prepared mixture is fed into a rubber kneading device such as an open roll mill, a Banbury mixer or a kneader together with a crosslinking agent (3). The compounding quantity of a crosslinking agent (3) is shown in Table 1-Table 3. Then, it is kneaded for 5 to 6 minutes at a temperature of 80 to 90°C.
[0205] The prepared rubber composition is placed in a hard mold, and pressurized and vulcanized at a temperature of 160-170° C. for 20-40 minutes to obtain a thi...
Embodiment 25～30
[0290] In the cleaning blades of Examples 19 to 24, 40 to 100 parts by mass of carboxyl group-introduced acrylonitrile-butadiene rubber or carboxyl group-introduced hydrogenated acrylonitrile-butadiene rubber is contained in 100 mass parts of rubber component (1). Butadiene rubber, based on 100 parts by mass of the rubber component (1), further contains 5 to 60 parts by mass of zinc oxide or magnesium oxide. The tensile strength of each cleaning blade is much greater than 10 MPa, and the volume expansion rate is not greater than 150%. Therefore, it has excellent cleaning effect and abrasion resistance. Embodiment 25~30 and comparative example 12~15
[0291] As shown in Table 5, each of the compositions of Comparative Example 11 and Comparative Example 12 contained XNBR or HXNBR, methacrylic acid and zinc oxide, the rubber was scorched and the kneading operation could not be performed. Therefore, a cleaning blade cannot be formed. In the cleaning blade of Comparative Example...
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Abstract
Description
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