TWI352099B - Conductive plastic composition - Google Patents

Description

1352099 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a plastic composition. More specifically, the present invention relates to a conductive plastic composition. The electroconductive plastic composition is preferably used for producing a thin package for a semiconductor such as an electronic component including 1 [Prior Art] In order to package and transport an electronic component including ic, an injection molded tray, vacuum forming has been used. Pallets, carrier tapes (also known as embossed carrier tapes), etc. In order to prevent damage to electronic parts caused by static electricity from friction or insulation, a package container containing a thermoplastic resin component and a conductive component has been developed. Such a packaged package typically includes a cover film for packaging, transport, and Seal and secure electronic components during assembly. The thermoplastic resin component is usually 匕3 acrylonitrile-butadiene-styrene resin, polystyrene resin, polyvinyl chloride resin or stupid ethylene-co-butylene resin, and fine metal powder, carbon fiber and conductive carbon black are used. As a conductive component. In order to meet the requirements of small size and fast packaging speed, the mechanical strength of the packaged content should be strengthened. At present, a composite of plastic sheets has been proposed.

113682.doc t 1352099 is satisfactory, and this usually causes the two layers to separate from each other. Accordingly, there is a need in the art for a conductive plastic composition for making a conductive surface layer having acceptable mechanical strength that is capable of sealing to a capping film and having satisfactory compatibility with the substrate layer. SUMMARY OF THE INVENTION The present invention provides a conductive plastic composition comprising: (A) a copolymer comprising a styrene block and an acrylate block; (B) a copolymer comprising an olefin block and an enoate block; And (C) carbon black; the composition contains 5 to 40 parts by weight of the dilute hydrocarbon block and the enoate per 100 parts by weight of the copolymer (A) comprising the styrene block and the acryl vine block. The block copolymer (B); and the carbon black (C) is contained in an amount of 5 to 35 parts by weight per 1 part by weight of the copolymer (A) comprising the styrene block and the acrylate block. On the other hand, the present invention provides a conductive plastic sheet which is made of the above composition. In still another aspect, the present invention provides a conductive composite plastic sheet comprising a substrate layer and a conductive surface layer laminated on at least one side of the substrate layer, wherein the conductive surface layer is made of the conductive plastic sheet. [Embodiment] The present invention provides a novel conductive plastic composition for preparing a conductive plastic sheet having good sealing strength, mechanical strength and surface resistivity. The package container for encapsulating and transporting the electronic component (4) made of the conductive plastic sheet according to the present invention can (4) to the cover film, 113682.doc 1352099 and has satisfactory compatibility with the substrate layer. • The conductive plastic composition comprises: (A) a copolymer comprising a styrene block and an acrylate block; (B) a copolymer comprising an olefin block and an enoate block; and (C) a carbon black; The composition contains 5 to 40 parts by weight of the copolymer comprising the olefinic segment φ and the enoate block per 100 parts by weight of the copolymer (A) comprising the styrene block and the acryl-acid vine block. (B); and 5 to 35 parts by weight of the carbon black (C) per 1 part by weight of the copolymer (A) comprising the styrene block and the acrylate block. • The composition according to the invention is used to form a conductive plastic sheet. Preferably, the conductive plastic sheet is used for manufacturing a conductive composite plastic sheet, the conductive composite plastic sheet comprising a substrate layer and a conductive surface layer laminated on at least one side of the substrate layer, wherein the conductive surface layer comprises Composition of the text. In addition, the package container comprises a conductive composite plastic sheet as described above and a cover film. The styrene containing the copolymer of styrene block and acrylate block (A) is designed to maintain a low softening point which facilitates sealing to the cover film. Preferably, the copolymer (A) comprising a styrene block and an acrylate block comprises from 10 to 80% by weight of a styrene block. In a preferred aspect of the present invention, the acrylate block of the copolymer (A) comprising a styrene block and an acrylic vine block is selected from the group consisting of acrylate, methyl acetonate, and methacrylic acid. a group of esters, butyl acrylates, and mixtures thereof 113682.doc 1352099. The sulphuric acid vinegar segment is a polar rear segment having excellent compatibility with the underlayer of the electroconductive composite plastic sheet according to the present invention. Further, the acrylate vinegar nipple has a satisfactory sealing property to the sealing film when applied to the packaging container according to the present invention.

In a preferred embodiment of the invention, the inclusion of the phenethyl ester and the propylene copolymer (4) further comprise a diene disintegration. In a preferred embodiment, the dilute block is butadiene. Specifically, when the dilute block is incorporated, the copolymer (4) has a relatively good firmness, flexibility, and timely folding properties, and both the seal strength between the container and the cargo and the adhesion to the carbon black are improved. . In a preferred aspect of the invention, the copolymer (A) comprising a styrene block and an acrylate block is selected from the group consisting of styrene-methacrylic acid vinegar copolymer, styrene-butadiene-methyl A group consisting of a methyl acrylate copolymer, a styrene butadiene-butyl acrylate copolymer, a styrene-butadiene-methyl methacrylate-acrylonitrile copolymer, and a mixture thereof.

According to the invention, the copolymer (B) comprising an olefin block and an enoate block is used to improve the compatibility between the copolymer (A) comprising a styrene block and an acrylate block and a substrate layer. And preventing the conductive surface layer from separating from the substrate layer. Further, the copolymer comprising the olefin block and the enoate block is also fastened to the capping film. In a preferred aspect of the invention, the olefin block comprising the copolymer (B) of the olefin block and the enoate block is ethylene. In a preferred aspect of the present invention, the enoate block of the copolymer (B) comprising an olefin block and an enoate block is selected from the group consisting of butyl acrylate, 曱113682.doc 1352099-based acrylate, A group consisting of vinyl acrylate and mixtures thereof. In a preferred aspect of the invention, the copolymer (B) comprising an olefinic segment and a dilute vinegar block is selected from the group consisting of ethylene, butyl acrylate, ethylene methacrylate, ethylene-acrylic acid. a group of vinyl esters and mixtures thereof. In a preferred embodiment of the present invention, the composition contains 20 to 30 parts by weight of the olefin-containing copolymer per 1 part by weight of the copolymer (A) comprising a stupid ethylene block and an acrylate block. a segment of the polymer with a polyester block (8). In a preferred aspect of the invention, the carbon black (c) is selected from the group consisting of furnace black, channel black, superconducting furnace black, and conductive furnace black. More preferably, the carbon black (c) has a large specific surface area, whereby a relatively small amount of carbon black can be used to obtain higher conductivity, etc., and, for example, σ, which can be Degussa®, Carbot®, Denka® or

High structural carbon black from Ketjen Black®. The carbon black should be incorporated in an amount such that the surface resistivity of 6 is in the range of 102 to 108 Torr, and preferably from 1 〇 3 to 10 Torr. If the right surface resistivity exceeds 1 〇 8β, sufficient antistatic charge should not be obtained and if it is less than i 〇 2 β, excessive power production capacity will destroy the electronic components. The carbon black (C) is used in an amount of from 5 to 35 parts by weight, preferably from 20 to 30 parts by weight, per 100 parts by weight of the copolymer (?) containing a styrene block and an acrylate block. If the amount is less than 5 parts by weight, sufficient conductivity is obtained without abalone, and the surface resistivity will increase. On the other hand, if it exceeds 35 parts by weight, it is often difficult to uniformly disperse into the resin, moldability tends to be remarkably deteriorated, and properties such as mechanical strength are also deteriorated. In a preferred embodiment of the invention, the composition further comprises 113682.doc (D) a stearthene-butadiene dilute copolymer, m ethylene vinyl acetate or chlorinated polyethylene. It is clear that Luzhi, the stupid ethylene copolymer provides a fairly good elongation strength without changing the sealing strength between the package and the grain. Furthermore, the composition according to the invention may be added with various additives such as lubricants, plasticizers, auxiliary fields, auxiliary agents, reinforcing agents (resin modifiers) or to improve the flow of the composition. Other resin components and mixtures thereof that characterize the dynamic properties of the molded product.

In order to prepare the composition, the starting material can be kneaded together with the starting material, or the starting material can be gradually kneaded and then finally the crucible and the product are put together and rubbed again and can be extruded by, for example, a Banbury® or Kneader® twin screw. The machine knows the machine to execute.

According to the invention, the substrate layer comprises a thermoplastic resin. For example, the thermoplastic resin is acrylonitrile-butadiene styrene, polystyrene or polycarbonate. Preferably, the substrate layer is preferably a thickness of an acrylonitrile-butadiene-styrene ruthenium foil layer. Between 〇·! and 3 〇mm, and the thickness of the conductive surface layer is 2 to 8 〇 0 / 厚度 of the thickness of the conductive composite plastic sheet. According to the present invention, the cover film is heat-sealed or pressure-sealed to the surface of the electroconductive composite plastic sheet. Preferably, the capping film is a poly(ethylene terephthalate) (PET) film. The package container according to the present invention can be produced by any conventional method, such as a method selected from the group consisting of pressure forming, vacuum forming, and thermoforming. The following examples are described for illustrative purposes only and are not intended to limit the scope of the invention. 113682.doc 1352099 Examples 1 to 5 and Comparative Examples 1 to 6 Table 1 lists the contents of the composition. The material of the backing layer is acrylonitrile-butadiene-stupid vinyl. Each material was weighed and uniformly mixed by a high-speed mixer, then kneaded by a 0 125 mm and 0 40 mm open-type twin-screw extruder, and pelletized by a wire-cut method to obtain a conductive plastic sheet as a conductive surface layer. . The substrate layer was laminated with a conductive surface layer on each side to form a sheet of 0.3 mm, wherein the thickness ratio of the conductive surface layer: substrate layer: conductive surface layer was 1:8:1. Table 1: Example Comparative Example Materials 1 2 3 4 5 1 2 3 4 5 PM-200 100 100 TI-300S 100 100 100 100 100 100 100 100 100 100 20 40 TOYOLAC920 100 EMA1209 5 15 15 15 15 25 15 15 15 15 TC020 5 EBA3107 15 EC300J 5 7 Denka 21 21 23 23 24 24 25 27 15 15 20 25 25 25 25 PH-88S 100 80 60 HP-9450 100 HI 043 5 Taipol3152 5 10 10 10 10 10 10 Select Y Υ Υ Υ Υ Υ Υ Υ Υ Υ

Comparative Example 6 is ECM3, Denka®. Copolymer comprising styrene block and acrylate block (A): styrene-methyl methacrylate copolymer: PM-200, A&L® styrene-butadiene-mercapto methacrylate copolymer : TI-300S, DIC® styrene-butadiene-decyl methacrylate-acrylonitrile copolymer: 113682.doc -11 - 1352099 TOYOLAC920, Toray® contains a copolymer of an olefin block and an enoate block ( B): Ethylene-methyl acrylate: EMA 1209, Dupont®: TC020, Exxon

Mobil® Ethylene-butyl acrylate: EBA 3107, Dupont® (C) Carbon black: Carbon black: Granular, Denka®; EC-300J, KETJEN BLACK INTERNATIONAL COMPANY® (D) Styrene-butadiene copolymer: Benzene Ethylene-butadiene copolymer: PH-88S, CHI MEI CORPORATION®, HP9450, FORMOSA CHEMICALS & FIBRE CORPORATION® Hydrogenated styrene-butadiene copolymer: H1043, Asahi®; Taipol 3152, TSRC® Methods to evaluate the characteristics of Examples 1 to 5 and Comparative Examples 1 to 6: Surface resistivity: As ASTM D-257, the surface resistivity in the detectable range was employed. Sealing strength: 25 mm wide strips prepared from the sheets of Examples 1 to 5 and Comparative Examples 1 to 6 were sealed with a sealing film by a sealing machine (TP-1000 manufactured by E&R®), and a conductive plastic sheet The sealing strength of the cap film was measured by a peeling tester (JE PFT-500 manufactured by OVERTOP TECHNOLOGY CO., LTD.) such as the EIA-481 method. Mechanical properties: Each of the sheets of Examples 1 to 5 and Comparative Example (1) was cut into a width of 2.5 cm and a length of 20 cm in the lateral and longitudinal directions thereof according to the ASTM D-882 method 113682.doc -12-1352099. Five strips. The five strips: the average of the tensile strength and elongation to the money were obtained from a universal tensile tester. Peel strength: Each of the sheets of Example (1) and Comparative Examples 1 to 6 was evaluated as listed below. - Method 1: A notch is formed by cutting on the sheets, and then a semicircular portion (about 5 cm2) is obtained by tearing off the sheet from the notch. Weighing ^ half φ * shaped part. The greater the weight of the round portion of the sheep, the more the conductive surface layer is peeled off. This reflects the compatibility between the conductive surface layer and the substrate layer. Method 2. From the sheets of Examples 1 to 5 and Comparative Examples 丨 to 6, a strip having a width of 25 mm and a length of m was prepared at 24 Å. The sealing temperature of the crucible and the pressure of 4 psi are sealed to the sealing film by a sealing machine (TP_1〇〇〇 manufactured by E&R®). The remainder of the conductive surface layer on the cover film is weighed. ◎ The greater the weight of the remainder, the more the conductive surface layer is peeled off. This reflects the compatibility between the conductive surface layer and the substrate layer. • The results are listed in Tables 2 and 3: Table 2: Example Comparison Example 1 2 3 4 5 1 2 3 4 5 6 Surface Resistivity (104 ohms/square) 4.2 5.2 5.3 4.7 4.0 410 4.3 6.2 5.0 5.2 4.9 Average Seal Strength 52 62 65 65 86 43 38 50 53 57 58 Sealing strength over 90 s NNNNYNNNNNN Mechanical strength (kg/cm2) 470 455 440 435 435 465 472 410 420 435 450 415 405 405 420 415 413 416 390 400 405 410 Elongation 6 6 9 15 13 7 5 9 8 8 8 5 5 7 10 9 6 4 6 6 5 6 Brake chamber weight (mg) Method 1 3.2 3.0 3.3 3.4 2.8 3.4 3.8 15 12 10 13 Method 2 0.5 0.4 0.6 07 0.3 0.8 0.9 2.0 1.6 1.4 1.4 U3682.doc -13- As shown in Table 2, the surface resistivities of Examples 1 to 5 are almost the same as those of Comparative Examples 2 to 5 because the carbon black content is the same (16 gamma%) Examples 1 and 2 are not contained ( D) styrene-butadiene dibutyl copolymer, and its elongation is lower than that of Examples 3 to 5. Compared with Comparative Example 2, the example ruthenium added 5% by weight of the olefin-containing block and the enoate block. The copolymer (7) and the seal strength and peeling were improved. With the addition of the examples in the examples 2 to 5, The ester block copolymer (B) has a significant increase in seal strength. However, the excess copolymer (B) (for example in Example 5) causes an excessively high seal (over 90 g) which will be packaged. Interference is caused when the electronic components in the packaged container are unpacked. The compatibility of Examples 丨 to 5 is superior to Comparative Examples 3 to 6. The above embodiments are merely illustrative of the principles and effects of the present invention, and The present invention is not limited to the spirit and scope of the present invention. The scope of the present invention should be as set forth in the appended claims. 113682.doc - 14-

Claims (1)

X. Patent Application Range: 1. A conductive plastic composition comprising: (A) a copolymer comprising a stupid ethylene block and an acrylate block; (B) a copolymer comprising an olefin block and an enoate block And (C) carbon black; the composition contains 5 to 40 parts by weight of the olefin-containing block and alkene per 100 parts by weight of the copolymer (A) comprising the styrene block and the acrylate block a copolymer (B) of an acid ester block; and containing 5 to 35 parts by weight of the carbon black (〇. 2) per 1 part by weight of the copolymer comprising the styrene block and the acrylate block. The composition of claim 1, wherein the copolymer (A) comprising a styrene block and an acrylate block comprises from 10 to 80% by weight of a styrene block. 3. The composition of claim 1, wherein the inclusion The acrylate block of the styrene block and the acrylate block copolymer (A) is selected from the group consisting of acrylate, methacrylate, methacrylate, butyl acrylate, acrylonitrile. And a mixture thereof. 4. The composition of claim 1, wherein the inclusion of the stupid ethylene block The acrylate block copolymer (A) further comprises a diene block. 5. The composition of claim 1, wherein the copolymer (A) comprising a stupid ethylene block and an acrylate block is selected from the group consisting of Group of components: styrene-methyl methacrylate copolymer, styrene-butadiene-methyl methacrylate copolymer, styrene-butadiene-butyl acrylate copolymer, styrene-butadiene - a mercapto methacrylate-acrylonitrile copolymer and a mixture thereof. 6. The composition of claim 1, wherein the olefin block comprising the olefin block and the olefin ester intercalation 113682.doc 1352099 copolymer (B) The segment is ethylene. The composition of the monthly claim 1 wherein the enoate block of the copolymer (B) comprising the dilute hydrocarbon block and the dilute vinegar block is selected from the group consisting of the following groups: The composition of claim 1, wherein the copolymer comprising the olefin block and the enoate block is selected from the group consisting of the following: Group: ethylene butyl butyl acrylate, ethylene methyl acrylate, ethylene propylene And a mixture thereof. The composition of claim 1 which contains 2 to 3 parts by weight per 100 parts by weight of the copolymer (A) comprising the styrene block and the acrylate block. The composition comprising the olefin block and the enoate block (B). The composition of claim 1, wherein the carbon black (c) is selected from the group consisting of: Black, channel black, superconducting furnace black, and conductive furnace black. 11. The composition of claim 1 which further comprises (D) a styrene-butadiene copolymer, ethylene-vinyl acetate or chlorinated polyethylene. 12. The composition of claim 1, further comprising an additive. The composition of claim 12, wherein the additive is selected from the group consisting of: a lubricant, a plasticizer, a processing aid, a reinforcing agent And other resin components and mixtures thereof for improving the flow characteristics of the composition and the dynamic properties of the molded product. A conductive plastic knee sheet comprising a composition as claimed. 15. The conductive plastic sheet of claim 14, which has ... to... Surface resistivity. 113682.doc 1352099 16. A conductive composite plastic sheet comprising a substrate layer and a conductive surface layer laminated on at least one side of the n layer, wherein the conductive surface layer comprises the composition of claim 1. 17. The electrically conductive composite sheet of claim 16, wherein the substrate layer is selected from the group consisting of acrylonitrile butadiene styrene, polystyrene, and polycarbonate. 18. The electrically conductive composite plastic sheet of claim 17, wherein the substrate layer is acrylonitrile-butadiene-styrene. 19. A package container comprising the electrically conductive composite plastic sheet of claim 16 and a cover film. 20. The electrically conductive composite plastic sheet of claim 19, wherein the cover film is a poly(ethylene terephthalate) film. 113,682.doc