Abstract: To provide a method and apparatus for seamless tubes in which the occurrence of material peeling can be prevented even when the skew angle ? and tube expansion ratio are increased. A piercing-rolling method for seamless tubes using a piercer, which is provided with a pair of cone-shaped main rolls and a pair of disk rolls, each pair being arranged in an opposing manner with a pass line therebetween as a center axis, and a plug whose center axis coincides with the pass line, wherein a billet to be pierced and rolled is advanced while being spirally rotated by a drive rotation of the main rolls; the method of which is characterized in each of the disk rolls being arranged in an inclined state at a fixed skew angle ? to the pass line.

Abstract: A high quality hollow shell in which the occurrence of internal surface flaws caused by the rotary forging effect and/or shear deformation is prevented by suppressing the rotary forging frequency and shear deformation in a transient region at the stage of billet gripping and a worsening of thickness deviations in the top portion of the hollow shell is also prevented is reliably produced with preventing miss-rolling such as incomplete billet gripping and troubles in bottom withdrawal and an increase in the outer diameter of the hollow shell in the bottom portion.

Abstract: A plug has a tip end portion, a taper portion, and a middle portion. The surface of the tip end portion is a spherical surface whose radius of curvature is R1 and length is L1 that is shorter than R1. The outer diameter of the taper portion on the front end side is D1, and the outer diameter on the back end side is D2 that is larger than D1, and the length is L2. The plug satisfies Expression (1), Expression (2) if 0<L1/R1<0.5 and Expression (3) if 0.5?L1/R1<1. The curve of the spherical surface of the tip end portion is gentler than that of the semi-spherical surface, and the diameter of a hole formed in a billet by the tip end portion is larger than that in the case of the semi-spherical surface. Therefore, the taper portion does not contact with the billet 0.5D1<L1+L2?2.5D1??(1) 1.0<D2/D1?1.4??(2) 1.0<D2/D1<1.8?0.8L1/R1??(3).

Abstract: The present invention provides a seamless tube piercing/rolling plug and a seamless tube producing method in which piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. The seamless tube piercing/rolling plug is used while a front part and a rear part of the split plug are held as an integral plug, at least the front part is made of low alloy steel, and oxide films are formed on surfaces of the front part and rear part. The present invention also provides a seamless tube piercing/rolling apparatus and a seamless tube producing method in which the front part and/or rear part is replaceable in a tube making process line using the seamless tube piercing/rolling apparatus.

Abstract: A high quality hollow shell in which the occurrence of internal surface flaws caused by the rotary forging effect and/or shear deformation is prevented by suppressing the rotary forging frequency and shear deformation in a transient region at the stage of billet gripping and a worsening of thickness deviations in the top portion of the hollow shell is also prevented is reliably produced with preventing miss-rolling such as incomplete billet gripping and troubles in bottom withdrawal and an increase in the outer diameter of the hollow shell in the bottom portion.

Abstract: The present invention provide a two-component anti-seizure agent for hot metal working process comprising the first aqueous solution and the second aqueous solution, wherein the first aqueous solution contains 10˜30 mass % of sodium silicate equivalent to anhydride to 100 mass % of total mass of the first aqueous solution, and the second aqueous solution contains at least one kind selected from a group consisting of: an organic acid and water-soluble amine salts thereof, an inorganic acid and water-soluble amine salts thereof, a water-soluble amine, a water-soluble alcohol, and a water-soluble metal chloride. When the two-component anti-seizure agent is applied onto disk-roll type guide shoes, it can be provided and maintained on the circumferential surface of the disk-roll type guide shoes without washed away by rolls' cooling water. Thereby, the anti-seizure agent does not adhere to rolls and the rolls and a pipe material do not cause slippage each other.

Abstract: A billet is provided on a pass line between a pusher and a plug, and the billet is advanced and caught between a plurality of inclined rolls. At least between when said caught billet contacts said plug and when the piercing and rolling reaches a steady state, the advancing speed of the billet is not less than the advancing speed of the billet when the piercing and rolling is carried out without pushing the billet forward by the pusher in the steady state. By this manufacturing method, inner surface defects at a tip end of a hollow shell can be restrained.

Abstract: A plug has a tip end portion, a taper portion, and a middle portion. The surface of the tip end portion is a spherical surface whose radius of curvature is R1 and length is L1 that is shorter than R1. The outer diameter of the taper portion on the front end side is D1, and the outer diameter on the back end side is D2 that is larger than D1, and the length is L2. The plug satisfies Expression (1), Expression (2) if 0<L1/R1<0.5 and Expression (3) if 0.5?L1/R1<1. The curve of the spherical surface of the tip end portion is gentler than that of the semi-spherical surface, and the diameter of a hole formed in a billet by the tip end portion is larger than that in the case of the semi-spherical surface. Therefore, the taper portion does not contact with the billet. 0.5D1<L1+L2?2.5D1??(1) 1.0<D2/D1?1.4??(2) 1.0<D2/D1<1.8?0.

Abstract: [Objective] To provide a method and apparatus for seamless tubes in which the occurrence of material peeling can be prevented even when the skew angle ? and tube expansion ratio are increased. [Means for solution] A piercing-rolling method for seamless tubes using a piercer, which is provided with a pair of cone-shaped main rolls and a pair of disk rolls, each pair being arranged in an opposing manner with a pass line therebetween as a center axis, and a plug whose center axis coincides with the pass line, wherein a billet to be pierced and rolled is advanced while being spirally rotated by a drive rotation of the main rolls; the method of which is characterized in each of the disk rolls being arranged in an inclined state at a fixed skew angle ? to the pass line.

Abstract: First and second polarizing plates are placed to be crossed nicols across a film to be inspected. A light source projects light toward the film through the first polarizing plate. Alight receiver receives the light transmitted through the film and the second polarizing plate. When ?1 represents an angle formed between an optical axis of the light receiver and a normal line that is perpendicular to the film surface, and ?2 represents a rotational angle formed between the optical axis and a reference line that is orthogonal to a slow axis of the film, the light receiver is positioned to satisfy the following conditions: 15°??1?35°, 20°??2?60°.

Abstract: An optical compensation film including: a support; an alignment film layer including a polymer having a radical polymerizable group; and an optical anisotropic layer including a liquid crystal compound, laminated in this order, wherein a content of a polymerization initiator capable of reacting with the radical polymerizable group and/or a compound capable of reacting with the radical polymerizable group and having two or more vinyl groups is 0.05% by mass to 30.0% by mass with respect to a total solid content of the polymer having a radical polymerizable group contained in the alignment film layer; and the like.

Abstract: A liquid crystalline composition is disclosed. The composition comprises at least one liquid-crystal compound and at least one fluoroaliphatic group-containing polymer of a formula (1-1). In the formula, i and j each indicate an integer equal to or more than 1; M represents k types of repetitive units each derived from an ethylenic unsaturated monomer (k indicates an integer equal to or more than 1); a, b and c each mean a mass percentage indicating a polymerization ratio; R11 and R12 each represent a hydrogen atom or a methyl group; X1 and X2 each represent an oxygen atom, a sulfur atom or —N(R13)—; R13 represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms; m1 and m2 each indicate an integer of from 1 to 6; and n1 indicates an integer of from 0 to 3.

Abstract: An aspect of the present invention defines the composition and the physical properties of a coating solution so that drying unevenness is not caused even when the coated film is dried rapidly based on the premise that the coating solution containing a liquid crystal compound is coated on a flexible strip substrate being transferred in an amount of 4.5 to 12 mL/m2. In the invention, a fluoroaliphatic-group-containing polymer including prescribed repeating units and also satisfying the prescribed condition is added to a coating solution for forming an optically anisotropic layer. As a result, the fluoroaliphatic-group-containing polymer travels rapidly to the interface between the coating solution and air in initial drying after coating, stabilizing the air interface of the coated film. Use of the invention therefore prevents drying unevenness even when the coating amount is increased and the solution is rapidly dried under conditions that tend to cause drying unevenness.

Abstract: In a drying method of an aspect of the present invention, drying steps are conducted immediately after coating in a drying zone, and during the execution of drying by blowing the one-way flow drying wind flowing from one edge side to another edge side in the width direction of the continuous support, the windless drying step is conducted in a windless drying zone provided in the drying zone where the drying wind is not blown.

Abstract: According to the drying method and apparatus of the present invention, at first, the coated film on one end side of the support is more quickly dried than that on the other end side, because drying air is supplied from one end side of the support. Subsequently, the coated film on the other end side of the support is more quickly dried than that on one end side, because drying air is supplied from the other end side of the support. Accordingly, the method and the apparatus can diminish a difference between drying rates in on one end side and in the other end side of the long support, in the whole drying zone. Thus, the method and the apparatus can uniformly dry the support and inhibit the production of a dry spot.

Abstract: The present invention provides a seamless tube piercing/rolling plug and a seamless tube producing method in which piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. The seamless tube piercing/rolling plug is used while a front part and a rear part of the split plug are held as an integral plug, at least the front part is made of low alloy steel, and oxide films are formed on surfaces of the front part and rear part. The present invention also provides a seamless tube piercing/rolling apparatus and a seamless tube producing method in which the front part and/or rear part is replaceable in a tube making process line using the seamless tube piercing/rolling apparatus.

Abstract: A seamless tube producing method uses a piercing/rolling plug wherein piercing/rolling is performed with an inclined rotary piercing mill while the seamless tube piercing/rolling plug is used as a piercing tool. In one mode, a front part and a rear part of the split plug are held as an integral plug, the front part being made of low alloy steel, and oxide films are formed on surfaces of the front part and rear part. In a second mode, the front part and/or rear part are replaceable via a removable mounting wherein a mandrel bar holding the plug goes through the rear part, the mandrel bar being coupled with the front part. A thickness of the oxide film formed in the front part can be 200 ?m or more and the oxide film of the front part can be thicker than the oxide film of the rear part.

Abstract: First and second polarizing plates are placed to be crossed nicols across a film to be inspected. A light source projects light toward the film through the first polarizing plate. A light receiver receives the light transmitted through the film and the second polarizing plate.

Abstract: Anti-reflection film includes a transparent support, at least one optical functional layer overlaid on the support, and a low refractive index layer, overlaid on the optical functional layer, and having a lower refractive index than the optical functional layer. An anti-reflection film producing apparatus to produce this includes a coater for coating a surface of the optical functional layer with liquid for forming the low refractive index layer, to form a coating layer. A dryer promotes drying of the coating layer. A heater hardens the coating layer from the dryer at a first temperature level, and then hardens the coating layer at a second temperature level higher than the first temperature level, to form the low refractive index layer. Preferably, a difference between the first and second temperature levels is 1-50 deg. C. Also, ultraviolet rays are applied to the low refractive index layer after the hardening of the heater.

Abstract: A pierced shell of an austenitic stainless steel having a good inner surface condition is provided, and a means is established which can perform mass production on an industrial scale of a good quality seamless steel pipe of stainless steel. An austenitic stainless steel billet with a P content of at most 0.040% and an S content of at most 0.020% is pierced under conditions such that the pipe expansion ratio H (outer diameter of shell/diameter of billet to be worked) satisfies the following equation to obtain a tube shell of an austenitic stainless steel. {P(%)/(0.025×H?0.01)}2+{S(%)/(0.015×H?0.01)}2?1. When manufacturing a seamless steel pipe of an austenitic stainless steel, the above-described shell is rolled to form a pipe.