Abstract:
A spray nozzle for spraying anti-termite agent has a base portion including a supply portion having a generally cylindrical shape and being formed with one or a plurality of jetting ports at one side end in the axial direction of the supply portion, and a horn portion having one end portion attached to the jetting ports side of the base portion. The horn portion has a plurality of air suction holes peripherally at an adjacent position where the jetting ports are situated about the axial direction thereof, and air is sucked by utilizing the Venturi effect of jet streams of the agent in order to spray the agent in bubble form.
Abstract:
Polyol component essentially consists of polyesterpolyetherpolyol containing polyesterpolyol by the weight ratio of 100:0 to 20:80, in which the polyesterpolyetherpolyol is a copolymer of polytetramethyleneglycol (PTMG) and .epsilon.-caprolactone by the weight ratio of 20:80 to 80:20 with an average molecular weight of 1000 to 3000 and the polyesterpolyol is a condensate of adipic acid as a main acid component with an average molecular weight of 1000 to 3000, is reacted with isocyanate component essentially consists of 4,4'-diphenylmethanediisocyanate (MDI) to make a prepolymer with terminal radical of NCO.Microcellular polyurethane produced from the prepolymer by foaming and polymerization reaction has the durability for vibration-proof material of car use, combining the advantage of PTMG such as high initial modulus at elongation, low heat built up, low-temperature property and hydrolysis-durability under high humid and hot conditions, with the advantage of polycaprolactone such as good molding property and anti-bending-fatigue property, as well as making up for the disadvantage of both polyols each other. Thus improving the problems of microcellular polyurethane using MDI such as low initial modulus at elongation and high heat built up.
Abstract:
A transparent film, the back-face of which has excellent resistance to scratch and printability, and a surface protection film which has such a transparent film are provided. A transparent film 10 has a substrate layer 12 formed of a transparent resin material, and a back-face layer 14 with a thickness of 1 μm or less provided on a first face 12A thereof. A percent change in coefficient of friction Δμ is less than 10% for the transparent film 10 when the percent change is determined from a coefficient of friction μ50 of the back-face layer after being conserved at 50° C. and 15% RH for three days and a coefficient of friction μ80 of the back-face layer after being conserved at 80° C. and 80% RH for three days, with an absolute value of difference between the two coefficients of friction |μ80−μ50| being divided by the smaller value of the two coefficients of friction.