Electrically conductive resin composition

[Detailed Description of the Invention]

The present invention relates to the outstanding resin purport constituent of high rigidity, solvent resistance 1 dimensional stability, forming processability, and conductivity. In connection with the earliness of the high-speed and high-density progress in Engineering C, the problem of an electromagnetic wave shield to electronic equipment has surfaced. Only from the device exterior, an internal IC comrade also influences each other in a noise, and has thrown doubt on stability and reliability. In a motion of a Light Bin small tendency, since a plastic begins to be used for housing material or component parts, committee Request other than the characteristics, such as merit of the processability and Inner productivity, such as rigidity and shield nature, have been advanced. They are Zn thermal spraying, sputtering, plastic plating, and 2j as a method of giving conductivity to a plastic and giving the effect of an electromagnetic wave shield! It acted as a 1 city of a Electricity paint, a carbon fiber composite material, the aluminum flakes compound material, etc., and they have put the part in practical use. However, it cannot say that there are not necessarily about a problem when applying these methods to the electronic equipment of precision accessories, and Zn thermal-spraying method is reliability by exfoliation over a long period of time, and the certainty of the effect to details, the hazardous property on work environment, etc. are not enough as it to a complicated-shaped cast. Sputtering is not fit for mass production with a thing with high device tt cost. Parcel plating is impossible for plastic plating, and also the resin which can be plated is limited. By exfoliation, cracking crack, etc., in respect of reliability, the mask which application to a complicated shape cast spreads in difficulty is necessity etc., and a conductive paint has a problem in respect of badge-of-a-company nature. In order that a carbon fiber composite material may acquire the high shield effect, it needs to be high-filled up with 20~30-fold Site %, and intensity, such as rigidity, improves, but processability is inferior and also it becomes an expensive material. In order for A17 Les 1 The compound material to realize sufficient shield effect moreover a gate jam arises and it does not become a shadow when flakes particle diameter molds an accessories precision component above IUXn, It is next to impossible to worsen the basic property of base resin failing in °, if there is no addition t about 20~60 capacity %, and to make a form as a light-gage cast. On the other hand, personalization of electronic equipment, FA-izing by a manufacturing process, production line-ization by a robot, etc. are severely demanded of the plastic material side in respect of accuracy of accessories precision component 1 intensity. It had to stop having to produce commercially by putting on a product and carrying it supposing the environment to the extent that it must have been expected more than former, such as shock resistance, solvent resistance, and heat resistance. However, it is weak to rigidity and heat resistance, and AB8 commercial resin is polycarbonate Abstract of trees (hereafter, purport A has ripple in solvent resistance and processability in p o November, and, as for polyacetal resin, there is a problem in the intensity and dimensional stability under high humidity environment at shock resistance, as for nylon resin.). As a result of repeating research and examination in consideration of the above, it resulted in this proposal. That is, it excelled in solvent resistance, high rigidity 0 dimensional stability, flow processability, and conductivity, and realized the wonderful characteristic especially in the precision accessories electronic equipment field. It is poly butylene terephthalate (henceforth) to 30~95 % of the weight of PC Shogun. pBT4tlJ111r and 1~30% of the weight, carbon fiber (henceforth, OF) O and 1~30% of the weight, it found out that it was a resin composition which comprises composition of 0.1~30 % of the weight of glass fibers (henceforth, GF), and 1~30 % of the weight of aluminum textiles (henceforth, MP), and reached the present invention. Even what depends p a 4J fat used for the present invention on the ester exchange reaction of the diester of a carbonic acid and the hydroxy compound which are obtained from ■ monofunctional aromatic series or a fatty acid hydroxy compound, ■ It may be PO resin of part-3'm10.000~100.000 which whichever may be sufficient as although based on the reaction of a dihydroxy compound and phosgene, and is produced by the industrial technique under existence of acid binding materials, such as a caustic alkali and pyridine. PBT resin is manufactured by the polymerization of butylene glycol and terephthalic acid, and should just be marketed. 81 oil may be added, while it has been liquefied, or where resin is impregnated. (Either a PAN system or a pitch system is OK as 3F, and 1~30 micro of Wire diameter and ten or more-aspect ratio highly efficient carbon fiber are used for it.) As 1 m of table processing, an epoxy system, acrylic, the Silang system, and a titanate system are applied. a F'- can consider 5~50 micro of Wire diameter, a 50 or more-aspect ratio Strand type, and D-Ping type. The surface treatment of the Silang system and a titanate system is good. Aluminum Filigree, brass textiles, and stainless steel textiles have a good Strand type by 1~50 micro of Wire diameter, and the Chatter oscillating cutting method beyond mass Pect ratio 50. The fiber manufactured by the fusion drawing-out method becomes a high aspect, and, also in Wire diameter, its effect improves thinly uniformly. The finishing agent of an epoxy system, acrylic, the Silang system, and a titanate system is applied. When pc resin is made below into 30-fold Site % by combination of the present invention, intensity, rigidity, and creeping property are no longer secured, and it is preferably [ 60~ao book tit% of ] good. Solvent resistance and flow processability worsen at less than 1]Hit%, and PBT resin is inferior in rigidity in 30 % of the weight or more. Preferably 10~15 % of the weight is good. 81 oil raises flow processability, at 5 % of the weight or more, does not show the effect expected more than fixed, but degrades other factors rather. Preferably 0.2~1 % of the weight is good. Although G shows an effect to high rigidity and 24 Electricity, 30% of the weight or more of addition has a problem in respect of a price side and the high shield effect not being acquired etc. Preferably it is 5~20-fold certificate %. Appearance worsens and GF carries out wear of a making machine or a metallic mold early, although addition beyond 30 pile company % improves rigidity. Preferably, 10~20-fold Touch % is good. MP has an effect in 4 Electricity and rigidity, and 30% of the weight or more of addition is difficult at a price and flow processability -- preferably 5~15 % of the weight is good. By it, a volume resistivity value attains to the range of 101~10-30alpha. The important point of the present invention has high viscosity as high strong round resin to general ■, in order to acquire the high shield effect in the low amount of addition, the large metal fiber of an aspect ratio is being used for it, but when carrying out melt kneading, it will be in the state where a metal fiber is cut and the shield effect can hardly be found out. Here, shield nature is held by being high-filled up with brass textiles and aluminum textiles. The Admiration effect more remarkable than the case where independent use is carried out has been realized by combining a metal fiber comrade, such as stainless steel textiles. OF also found out that the same effect was shown. It does not become invalid even if it adds the bulking agent generally used for the constituent of the present invention, lubricant, fire retardant, a metal degradation prevention agent, the stabilizer to acid ■zeta or heat, paints, etc. Melt kneading of the manufacturing process of a present invention resin composition is carried out using mixers, such as a Hensil mixer, the Banbury mixer, a kneader, roll-mill, and an extrusion machine, and it is made into a pellet. It is a master batch method beforehand, the Also, ingredient is blended, and it is also possible to carry out a simultaneous injection at the time of fabrication. That is, 2~3 steps of injection methods are also good at a manufacturing process. A forming process is extrusion molding. Forming methods currently generally used, such as injection molding, press-forming, compression molding, vacuum forming, extrusion sheet forming, and prore fabrication, may be applied. As a Garment use of the resin composition of the present invention, they are the (A) printer, FDD, and a word processor. Although raised as housing Kidnapping and internal parts, such as a microcomputer, a personal computer, a facsimile, a camera, VTR, a calculator, TV apparatus 1 communication equipment, and an image movie camera machine, it is not what was limited to these. An example and a comparative example explain the present invention concretely below. Example 1 * PC resin (molecule jlL20.000) -- 59.2 % of the weight PBT resin 10.4 pile f!L%81 oil 0.3 company % 5.0 % of the weight of OF(s) (0.5micro Silang system surface treatment article in thickness) 10.0 % of the weight of 15.0 % of the weight of ay(s) (0.5micro Silang system surface treatment article in thickness) brass textiles (processing article for the 0.5micro Silang system tables in thickness) were kneaded by fi[280degreeC and screw-rotation-speed 100 rpm with the machine for biaxial Push (the Ikegai place, POM30). The obtained pellet was fabricated with the injection molding machine (Quotation resin industry, ps40) with cylinder 1 temperature 290degreeC, injection pressure 1 *800+j/sd, and tool temperature C of 100 degrees after Jnu100 degrees of Warm Cx3-hour dryness. The flow value according a cast to a stress crack test in tensile strength, a tensile elastic modulus, Engineering zOd shock value 9 with Notch accuracy of dimension, and carbon tetrachloride:butanol =1:1 solvent and a flow tester and the volume resistivity value were measured. The result was summarized in the 1st table. As mentioned above, the Stalk constituent of the present invention is a useful material which can realize new physical-properties combination by which a superior hempen cloth was not carried out until now, and the effect is large and can be expected focusing on precision electronic equipment. Written amendment (spontaneity) Showa 6m Z ... 14 The Showa 58 patent application No. [ two ] 196982, the title of an invention Conductive resin composition It is a Mellow name about 3 and amendment. 4 Representative Several lots of the invention which increases by 2-6-21, Kyobashi, Chuo-ku, Tokyo, 104 >"5 and amendment 6, the object of amendment Written amendment (spontaneity) 1, the specification 6 Chastity of the 11th line "D-Ping tights" It amends to all the certain "roving type." 2, the page 7 of the 10th line of a specification "G" and is there are amended to "GF." 3 From under Ming Ill Document ? Page to the 6th Line It amends to "59.2-% of the weight" a certain Conference and 59 or 5-fold [ [] jtt%." 4, and the detailed Eclectic 11 negative 1st table are amended as the following. Above