日本电子级玻璃纤维布专利3汇总

NOTICES * JP。2003-89967

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DETAILED DESCRIPTION

[Detailed Description of the Invention]

[0001]

[Field of the Invention]The present invention relates to the opening method of the glass fiber fabric used for a printed-circuit board etc. [0002]

[Description of the Prior Art]In recent years, it is becoming what also has the more advanced characteristic required of a printed-circuit board with highly-efficient-izing of the electrical and electric equipment, and a miniaturization.

[0003]As one of such the demands, improvement in the surface smoothness on the surface of a fiber base material is mentioned. If surface smoothness is inferior, when a fiber will become is hard to be impregnated in resin uniformly in resin impregnation down stream processing at the time of producing the prepreg which serves as a printed-circuit board, for example and it will use for a printed-circuit board, in order to produce a continuity hole, make a hole with a drill etc., but. There is a possibility that the fault of a hole not deviating or a hole not becoming perfect circle-like may arise.

[0004]Therefore, in order to improve surface smoothness, it is preferable that opening treatment is performed, many research and development about this opening treatment are done, and the appearance of the opening method that the degree of opening is high is expected more efficiently. [0005]

[Problem to be solved by the invention]The present invention is the new method of opening a glass fiber fabric, and an object of the present invention is to provide the high method of the opening effect. [0006]

[Means for solving problem]The inventors inquired intensively that the aforementioned problem should be solved. When various conditions at the

time of producing a glass fiber fabric were examined and the glass fiber fabric after weaving in a damp or wet condition was heat-treated with the cylinder dryer currently conventionally used for warping processing of warp, the glass fiber fabric was opened by the surprising thing and it discovered that the opening effect was unexpectedly high.

[0007]When producing a glass fiber fabric, the warp which constitutes this glass fiber fabric is given to the process usually called warping processing in advance of weaving. The warping process sized warp, it was a process performed in order to make a weaving process easy to perform, when warp was dried after warp sizing, the cylinder dryer was used, but the cylinder dryer was not conventionally used for the opening treatment of textiles. After producing a glass fiber fabric conventionally and carrying out opening treatment of this by the water jet, the Vibrowasher, or an ultrasonic wave in the present invention, a ceramic heater or an infrared heater is used, When the place which was drying the glass fiber fabric was dried using the cylinder dryer, the knowledge of a glass fiber fabric being opened further was carried out by heat-treatment according to this cylinder dryer also unexpectedly. In the opening method by a conventional method, it discovered that especially the heat-treatment by a cylinder dryer could make warp open to what the direction of weft is easy to open among warp and weft. Furthermore examination is repeated and it came to complete the present invention.

[0008]Namely, the opening method of the glass fiber fabric heat-treating the textiles which the present invention contains (1) moisture and contain glass fiber in at least one copy with a cylinder dryer, (2) The opening method of the glass fiber fabric the description to the above (1), wherein glass fiber is E glass, (3) The above (1), wherein a cylinder dryer consists of two or more cylinders, or the opening method of the glass fiber fabric the description to (2), (4) The skin temperature of two or more cylinders is related with the above (3) being a temperature different, respectively, without the opening method of the glass fiber fabric a description.

[0009]

[Mode for carrying out the invention]The opening method of the present invention makes it the feature to heat-treat the textiles which contain glass fiber in at least one copy with a cylinder dryer. As long as it is satisfying even these requirements, it may be what kind of form. A preferable mode is described below.

[0010]Although the glass fiber in particular used for the present invention is not limited, glass fibers, such as E glass, D glass, T glass, C glass, and H glass, are mentioned, for example. These glass fibers could be manufactured in accordance with the publicly known manufacturing method, and even if a commercial item is used for them, they are not cared about. Especially, especially a preferable thing is E glass fiber.