Molded article and hollow tube
A coating film is provided in a cable, a medical hollow tube, a molded article and a hollow tube. The coating film is formed from a rubber composition including a rubber component and fine particles. A static friction coefficient on a surface of the coating film is 0.5 or less. When the coating film is subjected to a testing such that a long fiber non-woven fabric including cotton linters including an alcohol for disinfection with a length of 50 mm along a wiping direction is brought contiguous to the surface of the coating film at a shearing stress of 2×10 −3 MPa to 4×10 −3 MPa, followed by wiping off the surface of the coating film at a speed of 80 times/min to 120 times/min and 20,000 repetitions thereof for a wiping direction length of 150 mm, a difference (an absolute value of a difference) between the static friction coefficients of the coating film before and after the testing is not greater than 0.1.
1. A method for manufacturing a molded article comprising a molded article main body, and a coating film covering a surface of the molded article main body, the coating film adhering to the molded article main body, the method comprising:
a process to prepare the molded article main body;
a process to coat a liquid rubber composition on a surface of the molded article main body and form a coating film; and
a process to cure the coating film by heating the coating film by an infrared heater and form the coating film,
wherein the molded article main body comprises an infra-red absorbing component comprising at least one of titanium oxide, cobalt oxide, iron oxide, manganese oxide, chromium oxide, copper oxide, nickel oxide, and carbon, and the coating film comprises a rubber composition including a thermal curing rubber component, wherein a static friction coefficient on a surface of the coating film is 0.5 or less, and
wherein an adhesion strength between the molded article main body and the coating film is 0.30 MPa or more.
2. The method according to claim 1 , wherein a thermal curing rubber component in the rubber composition is an addition reaction type silicone rubber.
3. The method according to claim 1 , wherein the molded article main body comprises a silicone rubber.
4. The method according to claim 1 , wherein a content of the infra-red absorbing component is 0.1% by mass to 10% by mass per 100 parts by mass of a material of the molded article main body.
5. The method according to claim 1 , wherein no voids having a size of 10 μm or more is substantially present in the surface of the coating film when observed with an electron microscope SEM in a condition of a magnification of 1000 times.
6. A method for manufacturing a cable including a molded article as a sheath, wherein the molded article is prepared by the method according to claim 1 .
7. A method for manufacturing a medical hollow tube comprising a molded article as a hollow tube main body, wherein the molded article is prepared by the method according to claim 1 .