Provided are a super water repellent polymer hierarchical structure, a heat exchanger having super water repellency, and a manufacturing method thereof A super water repellent polymer hierarchical structure can be simply and repeatedly manufactured by using only a method for utilizing a super water repellent hierarchical structure and mechanically molding a polymer material thereon. In addition, a heat exchanger having super water repellency can be provided by providing super water repellency on the fin surface of a heat exchanger by using a dip method and vacuum drying.

A vacuum bagging diaphragm assembly used in forming a component from composite material includes a first sheet of a first material. Also included is a second sheet of a second material for positioning between a three dimensional forming tool and the first sheet. A modulus of elasticity of the second material is greater than a modulus of elasticity of the first material. A method includes a step of positioning a composite laminate material between a first sheet of a first material and a second sheet of a second material. The second material has a modulus of elasticity greater than a modulus of elasticity of the first material. The method further includes a step of positioning the second material of the second sheet in overlying relationship to a three dimensional forming tool with the second material positioned between the three dimensional forming tool and the composite material.

A vacuum bagging diaphragm assembly used in forming a component from composite material includes a first sheet of a first material. Also included is a second sheet of a second material for positioning between a three dimensional forming tool and the first sheet. A modulus of elasticity of the second material is greater than a modulus of elasticity of the first material. A method includes a step of positioning a composite laminate material between a first sheet of a first material and a second sheet of a second material. The second material has a modulus of elasticity greater than a modulus of elasticity of the first material. The method further includes a step of positioning the second material of the second sheet in overlying relationship to a three dimensional forming tool with the second material positioned between the three dimensional forming tool and the composite material.

This invention relates to a method for manufacturing a part of complex shape (3) by successive deposition of layers according to a technique of 3D additive printing and pressure sintering, comprising the following steps: an initial step of producing a model (1) from a material chosen from a porous or pulverulent material based on a metal alloy, a ceramic, a composite material and a lost material by formation of successive layers deposited according to the digitally controlled 3D additive printing technique, followed by a step of introducing a preform (1) made of porous or pulverulent material to be densified, derived from the model (1), into a mold (2) filled with a sacrificial porous or pulverulent material (13) in addition to the preform (1), the uniaxial densifying pressure sintering (10) then being applied to the mold (2) in order to form the part (3) which is finally extracted from the mold (2).

Embodiments relate to a polymerizable composition comprising a phosphorus-based mold releasing agent for an optical use whose preparation process is improved, and a process for preparing the phosphorus-based mold releasing agent. The phosphorus-based mold releasing agents can be prepared more easily and conveniently by using phosphorous pentoxide, which can easily react with a monoalcohol and/or water at room temperature in the absence of a catalyst or a solvent. In addition, byproducts are not generated during the reaction. Thus, when a lens is produced by using the mold release agent obtained therefrom, it is possible to prevent a defective appearance of the lens that may be caused by byproducts, thereby further enhancing the appearance properties thereof. Further, since separate steps for removing byproducts, specifically, such steps as washing and filtration, are not required, wastewater is not generated. Thus, it is not only environmentally friendly, but the production cost can also be reduced as the process is simple.

Embodiments relate to a polymerizable composition comprising a phosphorus-based mold releasing agent for an optical use whose preparation process is improved, and a process for preparing the phosphorus-based mold releasing agent. The phosphorus-based mold releasing agents can be prepared more easily and conveniently by using phosphorous pentoxide, which can easily react with a monoalcohol and/or water at room temperature in the absence of a catalyst or a solvent. In addition, byproducts are not generated during the reaction. Thus, when a lens is produced by using the mold release agent obtained therefrom, it is possible to prevent a defective appearance of the lens that may be caused by byproducts, thereby further enhancing the appearance properties thereof. Further, since separate steps for removing byproducts, specifically, such steps as washing and filtration, are not required, wastewater is not generated. Thus, it is not only environmentally friendly, but the production cost can also be reduced as the process is simple.

A disposable mold core for producing a fiber-reinforced component includes a support core having a granulate and a binder. The support core has a hard shell formed of the binder and the granulate, and an inner core which is binder-free and formed of the granulate. A related method of producing a fiber-reinforced component is disclosed.

To provide a novel fluorine-containing compound that does not include any long chain perfluoroalkyl unit having 8 or more carbon atoms, which is problematic in terms of the environment, and that is excellent in water repellency/oil repellency, and a surface modifier using the compound. [Solution] There are used a fluorine-containing compound represented by the following general formula (1), the following general formula (2) or the following general formula (5): Rf.sup.1—(CR.sup.1═CR.sup.2—X—Rf.sup.2).sub.n—Y—Z (1), Rf.sup.1—(X—CR.sup.1═CR.sup.2—Rf.sup.2).sub.n—Y—Z (2) or Rf.sup.3—(CF═CR.sup.3—CR.sup.4═CF—Rf.sup.4).sub.n—Y—Z (5); and a surface modifier using the compound.

To provide a novel fluorine-containing compound that does not include any long chain perfluoroalkyl unit having 8 or more carbon atoms, which is problematic in terms of the environment, and that is excellent in water repellency/oil repellency, and a surface modifier using the compound. [Solution] There are used a fluorine-containing compound represented by the following general formula (1), the following general formula (2) or the following general formula (5): Rf.sup.1—(CR.sup.1═CR.sup.2—X—Rf.sup.2).sub.n—Y—Z (1), Rf.sup.1—(X—CR.sup.1═CR.sup.2—Rf.sup.2).sub.n—Y—Z (2) or Rf.sup.3—(CF═CR.sup.3—CR.sup.4═CF—Rf.sup.4).sub.n—Y—Z (5); and a surface modifier using the compound.

A molded article of a carbon fiber composite material includes at least carbon fibers and a resin composition. The molded article of a carbon fiber composite material is characterized in that the surface roughness Ra thereof is 0.01-2 μm and in that the tensile shear adhesive strength (F0) thereof when a metal has been adhered to the surface thereof via an adhesive layer that contains an epoxy compound and is 0.1-3 mm thick is 10-40 MPa.