Thermoplastic resin sheet having hairlike bodies and molded product thereof

A manufacturing method for a resin sheet having hairlike bodies arranged regularly on at least one surface of an underlayer, the hairlike bodies being formed by:

• melt extruding, from a die with an extrusion molding method, a thermoplastic resin having, on a log-log graph having elongational viscosity η(t) (unit:
• Pa·S) as measured at a strain rate of 0.5 (unit:
• S−1) and at a temperature at which elongation is possible as the vertical axis and elongation time t (unit:
• S) as the horizontal axis, a region in which the slope (log η/log t) in the interval 0.1<t<1.0 is no greater than 0.5 and by the temperature range in which the adhesive force in probe tack measurement is 0.05-0.25 N/mm2 at least partially overlapping with the temperature at which elongation is possible;
• and
• adjusting a temperature of a transfer roll to the temperature of the thermoplastic resin at which elongation is possible and the temperature at which the adhesive force of the thermoplastic resin in probe tack measurement is 0.05-0.25 N/mm2 and casting with a pinch pressure between the transfer roll and a touch roll of 30-120 Kg/cm2,
• wherein the hairlike bodies extend hairlike in a direction away from the underlayer in a shape in which the hairlike bodies thin approaching a tip, the average height of the hairlike bodies is no less than 100 μm and no greater than 1,200 μm, the average diameter of the hairlike bodies is no less than 1 82 m and no greater than 50 μm, and the average spacing of the hairlike bodies is no less than 20 μm and no greater than 200 μm,
• the elongation viscosity is measured by using an elongation viscosity measuring instrument, retaining a 2 mm diameter cylindrical test piece on a roll with a width of 100 mm in an oil bath maintained at the temperature of the thermoplastic resin at which elongation is possible and stretching the test piece by rotating the roll at a fixed speed of 0.5 S−1,
• the adhesive force is measured using a tackiness tester and, under the following conditions, placing a sample material on a stage, contacting a bottom surface of a columnar probe with a sample adhesive surface from above at a designated speed and with a designated load control and penetration control method, removing the probe from the sample at a set speed, and the resistance experienced by the probe due to the adhesive force at this time is measured as the load value:
• Temperature:
• temperature at which elongation is possible of each thermoplastic resin,
• Contact rate:
• 120 mm/minute,
• Release rate:
• 600 mm/minute,
• Contact load:
• 500 gf (0.25 N/mm2),
• Contact time:
• 15 seconds,
• Probe shape:
• Columnar, ø 5 mm,
• Probe material:
• Chromium oxide, and
• the temperature at which elongation is possible is temperatures positioned between those of the rigid state and the molten state when a strand is set in a uniaxial elongation viscometer and stretched.