32results about How to "Does not affect wear resistance" patented technology

The present invention provides a pneumatic tire for passenger vehicles that can significantly reduce tire weight and rolling resistance without affecting desired tire performance. At least one carcass ply is spanned between a pair of bead parts, a bead core is embedded in each bead part, at least one reinforcing layer is arranged on the outer peripheral side of the carcass ply, and a tread rubber layer is laminated on the outer peripheral side of the reinforcing layer In the pneumatic tire, a pair of first boundary lines orthogonal to the inner surface of the tire are defined by the intersection of the extension line of the side arc and the extension line of the shoulder arc that constitute the tread profile, and a pair of first boundary lines orthogonal to the inner surface of the tire is defined by the rim detection line. For the second boundary line, divide the first area between a pair of first boundary lines, divide the second area between the first boundary line and the second boundary line, divide the third area on the toe side of the second boundary line, divide the first The cross-sectional area (mm2) from the region to the third region is respectively set as SA, SB, and SC, and the edge lengths (mm) along the inner surface of the tire from the first region to the third region are respectively set as a, b, and c, the ratio SA / a, SB / b satisfy the relationship of 7.5≤SA / a≤11.5, 2.0≤SB / b≤6.0.

The invention provides a highly wear-resistant bio-based polyamide composite material and a preparation method thereof. The bio-based polyamide composite material contains polyamide resin and a wear-resisting agent. Production raw materials of the polyamide resin comprise pentanediamine and diacid. A weight ratio of the polyamide resin to the wear-resisting agent is 100: 0.5-25. The preparation method comprises the following steps: at least mixing the polyamide resin and amino polysiloxane at room temperature; and successively carrying out extrusion granulation at 220 to 300 DEG C, cooling and drying so as to obtain the highly wear-resistant bio-based polyamide composite material. The polyamide composite material provided by the invention has good mechanical properties and wear resistance; the wear-resisting agent amino polysiloxane does not influence the color of the polyamide composite material and poses no restriction to application occasions of the polyamide composite material; and the the preparation method provided by the invention has the advantages of easiness, low cost and accordance with production requirements of industrialization.

The invention discloses an organic-inorganic hybrid sealant for a plasma spraying ceramic coating. The organic-inorganic hybrid sealant comprises a precursor A, a methyl silicone resin film forming agent B, absolute ethyl alcohol, ammonia water and deionized water; the precursor A comprises ethyl orthosilicate and methyl triethoxysilane with a molar ratio of 100:(60-200); the molar ratio of the precursor A to the absolute ethyl alcohol to the ammonia water to the deionized water is 1: (30-35):(2-3):(5-7); and the addition amount of the methyl silicone resin film forming agent B accounts for 1-5% of the total mass of the organic-inorganic hybrid sealant for the coating. The invention further discloses a preparation method of the organic-inorganic hybrid sealant for the plasma spraying ceramic coating and application of the sealant to sealing treatment of the plasma spraying ceramic coating. The sealant disclosed by the invention is capable of taking a long-acting effect on protecting the plasma spraying ceramic coating used in a water environment and incapable of affecting the wear resistance of the ceramic coating.