摘要:
PROBLEM TO BE SOLVED: To provide a heat insulating wall having improved heat insulating performance as compared with a conventional one, a heat insulating box body, and a method of manufacturing the same.SOLUTION: A heat insulating housing comprises: a hollow wall body; and an open-cell resin body integrally foamed so as to fill a heat insulating space that is a hollow portion of the hollow wall body. The open-cell resin body includes: a plurality of air bubbles 47; air bubble film portions; air bubble skeleton portions 43; first through-holes formed so as to penetrate the air bubble film portions; and second through-holes 45 formed so as to penetrate the bubble skeleton portions. The plurality of air bubbles communicate with one another via the first through-holes and the second through-holes.
摘要:
PROBLEM TO BE SOLVED: To provide a water-proof and dust-proof membrane assembly having sufficient water-proofness, dust-proofness, sound transmittance and air-permeability, while having superior supporting member strength and pressure resistance.SOLUTION: The water-proof and dust-proof membrane assembly comprises a body and a supporting member. The body is in form of membrane and has a first surface, a second surface and an asymmetric porous structure. The supporting member is made of a polymeric material and has a first contacting surface and a second contacting surface, wherein a second volumetric porosity of the supporting member is greater than the first volumetric porosity and is 10-99.9%. The first contacting surface of the supporting member is adhered to the first surface of the body.
摘要:
PROBLEM TO BE SOLVED: To provide a crystalline polymer microporous membrane efficiently capturing microparticles and ensuring high flow rate without clogging, long filtration life, and high strength; to provide a method for accurately producing the crystalline polymer microporous membrane; and to provide a filtration filter using the same.SOLUTION: The method for producing the crystalline polymer microporous membrane includes: a laminate forming step where a first crystalline polymer is laid in a mold, and compressed to form a first preform, and a second crystalline polymer is laid in a mold and compressed to form a second preform, and the first and second preforms are respectively extruded to form first and second extrusion bodies and a laminate is formed by laminating the first and second extrusion bodies; an asymmetric heating step of heating one surface of the laminate to form temperature gradient in the thickness direction of the laminate; and a drawing step of drawing the laminate.
摘要:
Sheet of gastight film is wrapped around a porous open-celled cuboid core. The free film end is welded to the rear end of the film wrapping along a core face and the sealed area folded onto the core face. Excess film at each side edge of the core is folded together without tension, laid against the entire surface of each core edge face and sealed. The film wrapped core is then completely evacuated and the remaining opening sealed under vacuum. Sheet of gastight film is wrapped tightly around the outer face of a porous open-celled cuboid core (3) with flat edges. The free film end is welded (13,14) to the rear end of the film wrapping along a core face (16) and the sealed area folded onto the core face. Excess film at each side edge (24) of the core is folded together without tension, laid against the entire surface of each core edge face and sealed. The film wrapped core is then completely evacuated and the remaining opening sealed under vacuum. An Independent claim is made for a flat edged prism shaped, preferably rectangular, heat insulating element comprising an open celled cuboid core (3) completely enclosed in a single sheet of gastight film.
摘要:
In a process for perforating smooth, skinned surfaces of open cell plastic foams, an extruded plastic foam sheet (16) is heated, vacuum formed, cooled and one of the facing skins (12,13) is perforated by needles (4). Process equipment has a tool part (11) with fixed or movable needle (4) in a matrix pattern. Needle tips (18) extend above the tool (11) surface during perforation. Pref. in process variations (i) the sheet (16) may be coextruded with a coloured or uncoloured facing layer of similar or dissimilar material to the sheet (16) before vacuum forming and perforating or (ii) the plastic sheet (16) itself is extruded without facing layers. Needling may be performed before or after sheet (16) thermoforming. Needles (4) may oscillate backwards and forwards or are fixed in a tool block which is moved towards the sheet (16) supported on a backing plate. In an alternative process perforating is effected by needles on a rotating roller, prior to thermoforming. A container can be perforated in both sidewalls and base by needles moving perpendicular to the respective surfaces. In a further alternative process the thermoformed prod. is moved to a perforating station and pressed against a fixed plate by moveable perforating blocks. Needles fixed to a plate are then raised to perforate the prod. resting on the perforating block.