The present invention provides a corrugated tube and a method for manufacturing the same capable of improving workability in press-fitting work of a pipe or a quick connector. A corrugated tube includes a flexible section having a first corrugated section and a second corrugated section, and straight sections integrally formed at both ends of the flexible section respectively. A length of valley portions in an axial center direction is larger than a length of valley portions in the first corrugated section, thereby allows a pitch P2 of mountain portions in the second corrugated section provided between the straight section and the first corrugated section to be larger than a pitch P1 of mountain portions in the first corrugated section.

The present invention provides a corrugated tube and a method for manufacturing the same capable of improving workability in press-fitting work of a pipe or a quick connector. A corrugated tube includes a flexible section having a first corrugated section and a second corrugated section, and straight sections integrally formed at both ends of the flexible section respectively. A length of valley portions in an axial center direction is larger than a length of valley portions in the first corrugated section, thereby allows a pitch P2 of mountain portions in the second corrugated section provided between the straight section and the first corrugated section to be larger than a pitch P1 of mountain portions in the first corrugated section.

A multi-component extrusion die head for producing a composite tube comprises an extrusion nozzle, a main die head, and a melt flow distributor device. The main die head is configured to supply the extrusion nozzle with a first melt flow and a second melt flow, which are guided separately from one anther in the extrusion nozzle away from the main die head and toward a nozzle outlet of the extrusion nozzle. The melt flow distributor device is arranged in the extrusion nozzle outside of the main die head and is configured to split the first melt flow in a peripheral direction thereof, and to supply the second melt flow to the first melt flow such that at least one section of the second melt flow is arranged within the first melt flow in the peripheral direction.

A multi-component extrusion die head for producing a composite tube comprises an extrusion nozzle, a main die head, and a melt flow distributor device. The main die head is configured to supply the extrusion nozzle with a first melt flow and a second melt flow, which are guided separately from one anther in the extrusion nozzle away from the main die head and toward a nozzle outlet of the extrusion nozzle. The melt flow distributor device is arranged in the extrusion nozzle outside of the main die head and is configured to split the first melt flow in a peripheral direction thereof, and to supply the second melt flow to the first melt flow such that at least one section of the second melt flow is arranged within the first melt flow in the peripheral direction.

There is provided a touch fastener that has high followability to the relative movement of portions to be engaged and does not easily separate from a mating member, and thus is usable in a wider range of applications. In the touch fastener, all the elements, that is, first strands, second strands, and engagement elements are formed of a thermoplastic elastomer. Further, the plurality of first strands and the plurality of second strands are disposed to intersect with each other, and consequently, hole portions each surrounded by the two adjacent first strands and the two adjacent second strands are provided. Accordingly, it has a high elastic function, easily stretches, and has high followability to the relative movement of portions to be engaged.

A versatile silicone resin reflective substrate which exhibits high reflectance of high luminance light from an LED light source over a wide wavelength from short wavelengths of approximately 340-500 nm, which include wavelengths from 380-400 nm near lower limit of the visible region, to longer wavelength in the infra-red region. The silicone resin reflective substrate has a reflective layer which contains a white inorganic filler powder dispersed in a three-dimensional cross linked silicone resin, the inorganic filler powder having a high reflective index than the silicone resin. The reflective layer is formed on a support body as a film, a solid, or a sheet. The silicone resin reflective substrate can be easily formed as a wiring substrate, a packaging case or the like, and can be manufactured at low cost and a high rate of production.

Net-shape composites and methods of manufacturing are described herein. The method of preparing net-shape composites may include combining a first semi-solid component with a second semi-solid component to form a polymer composition, and forming the polymer composition into the net-shape composite, wherein each of the semi-solid components has a yield stress of at least 50 Pa. The first semi-solid component may include a first portion of a filler, and the second semi-solid component may include a second portion of a filler that is the same or different than the filler of the first semi-solid component.

Net-shape composites and methods of manufacturing are described herein. The method of preparing net-shape composites may include combining a first semi-solid component with a second semi-solid component to form a polymer composition, and forming the polymer composition into the net-shape composite, wherein each of the semi-solid components has a yield stress of at least 50 Pa. The first semi-solid component may include a first portion of a filler, and the second semi-solid component may include a second portion of a filler that is the same or different than the filler of the first semi-solid component.

Provided are a method and an apparatus for extruding into a tube and filling the tube at a high speed and simultaneously sealing the tube. Specifically provided is a method for producing a polymer tube, containing a liquid therein and being sealed at constant intervals, the method including an extrusion step of continuously melt-extruding a polymer material through a die into at least one tube, while feeding a liquid into the tube to obtain at least one liquid-containing tube; and sealing step of discontinuously pressing the at least one liquid-containing tube between a pair of pressurizing members at constant intervals to cause pressure-bonding before the tube solidifies, while continuously taking up the extruded tube.

Coextruded polymeric netting having a machine direction comprising: a plurality of pairs of: first segments each having first and second opposed major surfaces and a thickness, the first segments comprising first material; second segments comprising second material, wherein adjacent first segments are joined together via a second segment, wherein the second segments extend from the second major surface past the first major surface of each first adjacent segment and has a distal end, the second segments having first and second opposed major surfaces, wherein there is a gap between adjacent second segments; and a third material, different from the first and second materials on at least one of the first or second major surfaces of at least every other second segment, wherein the first segments, second segments, and third material each extend continuously for at least 5 mm in the machine direction, and wherein first and second materials of adjacent pairs are periodically bonded together in the machine direction. Uses for coextended polymeric articles described herein include fasteners.