摘要:
A gas laser apparatus having transparent laser windows provided on a laser chamber body, in which operating gases is sealed if necessary, comprising circulation means connected to the laser chamber body through an intake port and a discharge port for circulating gases within the laser chamber body and filtration means disposed in said circulation means, further comprising cutoff means for preventing the laser windows from being stained and open and closeably cutting off between the laser chamber body and the laser windows, and having a construction wherein in replacing the laser window, the cutoff means is once placed in a cutoff state, and the laser window is separated from the laser chamber body to place the laser window.
摘要:
A laser light, whose wavelength is to be measured, is introduced into an etalon, a concentric circular interference stripe derived from the etalon is irradiated onto a one-dimensional photodetector array and a diameter of the interference stripe is measured to measure the wavelength of the laser light. Alternatively, if a reference laser light of known wavelength is introduced into the etalon, as described above, a wavelength measurement of extremely high accuracy can be made without being affected by positional deviations of the optical system.
摘要:
A discharge exciting excimer laser device comprises a pair of main discharge electrodes, a dielectric and an auxiliary electrode. The dielectric is in a cylindrical form and has a side opposed to one of the main discharge electrodes, which side is formed into a flat plate-like portion. The auxiliary electrode is embraced within the dielectric leaving a space and is opposed to one of the main discharge electrodes with the flat plate-like portion of the dielectric sandwiched therebetween. Such a construction increases laser output and improves insulating performance.
摘要:
Angles of inclination of the two wavelength selection elements arranged on an optical path of a laser beam source are varied to make a laser output variable. Light transmitting ranges of the two wavelength selection elements are coincided with each other so as to adjust the light wavelength bands, thereby the laser beam is narrowed without increasing its fineness.
摘要:
This invention is provided with a wavelength selecting means for uses in selectively receiving beam in compliance with each of a reference beam and a measured beam in order to simplify a correction or comparison of oscillating wavelengths in the laser device and further to improve a reliability and a controlling responsive speed.
摘要:
It is an object of the invention to provide polypropylene adhesives which have excellent adhesion to polar materials and exhibit particularly excellent adhesion after high-speed cast film processing, stretching or extrusion coating, and are excellent in blushing resistance, and multilayer structures having the adhesives.The adhesive resin composition is a grafted resin composition comprising a polypropylene component (A), an ethylene/propylene/α-olefin copolymer component (B), an ethylene/α-olefin copolymer component (C), and an unsaturated carboxylic acid and/or a derivative thereof (D), and which contains the component (A) at 5 to 80 parts by mass, the component (B) at 5 to 70 parts by mass and the component (C) at 1 to 40 parts by mass based on 100 parts by mass of the components (A), (B) and (C) combined and has an ethylene/propylene/α-olefin ratio in n-decane-soluble components of 5-95/5-95/1-50 mol % and a graft ratio of 0.01 to 5 wt %.
摘要:
A multilayered article and vessel, which are superior in the properties, such as shock resistance, rigidity, an ability to barrier against gasoline and interlayer adhesion, and are permissible of being recycled for reuse, comprising a base layer (A1) comprising a polyetylene resin (a1) having an MFR (ASTM D 1238, 190° C., 2160 g) of 0.001 to 0.5 g/10 min. and a density of 0.945 to 0.980 g/cm3, an adhesive layer (A2) comprising a modified etylene/&agr;-olefin copolymer (a2) which is modified by having grafted thereon an unsaturated carboxylic acid or its derivative and has a density of 0.900 to 0.940 and a barriering layer (B) comprising an ethylene/vinyl alcohol copolymer (b), wherein the Izod impact strength (with notch) (ASTM D 256, −40° C.) for a sheet specimen which is prepared by mechanically crushing the laminate into powder, granulating the resulting powder on a monoaxial extruder to form a resin composition and pressing the granular composition on a press molding machine into a sheet of 3 mm thickness at a temperature of 230° C. under a pressure of 50 kgf/cm2 with cooling under the condition defined by ASTM D 1928, is at least 100 J/m.
摘要翻译:具有优异性能的多层制品和容器,例如耐冲击性,刚性,阻挡汽油的能力和层间粘合性,并且是允许再循环使用的,包括:包含聚乙烯树脂的基层(A1) a1)具有0.001至0.5g / 10min的MFR(ASTM D 1238,190℃,2160g)。 和密度为0.945〜0.980g / cm3的粘合剂层(A2),其包含改性乙烯/α-烯烃共聚物(a2)的粘合剂层(A2),其通过在其上接枝不饱和羧酸或其衍生物并且具有0.900至 0.940和包含乙烯/乙烯醇共聚物(b)的阻塞层(B),其中用于通过机械破碎所得到的片材试样的悬臂梁式冲击强度(具有切口)(ASTM D 256,-40℃) 层压成粉末,将得到的粉末在单轴挤出机上造粒,形成树脂组合物,并将压制成型机上的粒状组合物在压力为50kgf / cm2的温度下在230℃的温度下压制成3mm厚的片材 在ASTM D 1928规定的条件下冷却至少为100J / m。
摘要:
It is an object of the invention to provide polypropylene adhesives which have excellent adhesion to polar materials and exhibit particularly excellent adhesion after high-speed cast film processing, stretching or extrusion coating, and are excellent in blushing resistance, and multilayer structures having the adhesives. The adhesive resin composition is a grafted resin composition comprising a polypropylene component (A), an ethylene/propylene/α-olefin copolymer component (B), an ethylene/α-olefin copolymer component (C), and an unsaturated carboxylic acid and/or a derivative thereof (D), and which contains the component (A) at 5 to 80 parts by mass, the component (B) at 5 to 70 parts by mass and the component (C) at 1 to 40 parts by mass based on 100 parts by mass of the components (A), (B) and (C) combined and has an ethylene/propylene/α-olefin ratio in n-decane-soluble components of 5-95/5-95/1-50 mol % and a graft ratio of 0.01 to 5 wt %.
摘要:
A multilayered article and vessel, which are superior in the properties, such as shock resistance, rigidity, an ability to barrier against gasoline and interlayer adhesion, and are permissible of being recycled for reuse, comprising a base layer (A1) comprising a polyetylene resin (a1) having an MFR (ASTM D 1238, 190° C., 2160 g) of 0.001 to 0.5 g/10 min. and a density of 0.945 to 0.980 g/cm3, an adhesive layer (A2) comprising a modified etylene/&agr;-olefin copolymer (a2) which is modified by having grafted thereon an unsaturated carboxylic acid or its derivative and has a density of 0.900 to 0.940 and a barriering layer (B) comprising an ethylene/vinyl alcohol copolymer (b), wherein the Izod impact strength (with notch) (ASTM D 256, −40° C.) for a sheet specimen which is prepared by mechanically crushing the laminate into powder, granulating the resulting powder on a monoaxial extruder to form a resin composition and pressing the granular composition on a press molding machine into a sheet of 3 mm thickness at a temperature of 230° C. under a pressure of 50 kgf/cm2 with cooling under the condition defined by ASTM D 1928, is at least 100 J/m.
摘要翻译:具有优异性能的多层制品和容器,例如耐冲击性,刚性,阻挡汽油的能力和层间粘合性,并且是允许再循环使用的,包括:包含聚乙烯树脂的基层(A1) a1)具有0.001至0.5g / 10min的MFR(ASTM D 1238,190℃,2160g)。 和密度为0.945至0.980g / cm 3的粘合剂层(A2),包含改性的亚乙烯/α-烯烃共聚物(a2)的粘合剂层(A2),其通过在其上接枝不饱和羧酸或其衍生物并具有密度 为0.900〜0.940,以及包含乙烯/乙烯醇共聚物(b)的阻挡层(B),其中用于片材试样的悬臂梁式冲击强度(具有切口)(ASTM D 256,-40℃) 将层压体机械破碎成粉末,将所得粉末在单轴挤出机上造粒,形成树脂组合物,并将压制成型机上的粒状组合物在压力为50℃的压力下在230℃的温度下压制成3mm厚的片材 kgf / cm 2,在ASTM D1928规定的条件下冷却至少为100J / m。
摘要:
In order to obtain a weld bead having a good outer appearance with little splash of sputters or the like and a sufficient shearing force, there is provided a flash lamp control section for controlling flash lamps so as to generate two rectangular waves in a pulse wave form at every cycle of a pulse laser beam generated by a pulse YAG laser during the irradiation of the pulse laser beam on coated metal materials. The flash lamp control section is adapted to control a relationship between a peak power and a pulse width of a first rectangular wave and a peak power and a pulse width of a second rectangular wave in predetermined ranges. Under the control of the flash lamp control section, the pulse laser beam generated by the pulse YAG laser is irradiated to the coated metal materials thereby carry out the irradiating operation.