WO2007073087A1 - Sheet for using in extreme environments and tray for electronic parts produced therefrom - Google Patents
Sheet for using in extreme environments and tray for electronic parts produced therefrom Download PDFInfo
- Publication number
- WO2007073087A1 WO2007073087A1 PCT/KR2006/005580 KR2006005580W WO2007073087A1 WO 2007073087 A1 WO2007073087 A1 WO 2007073087A1 KR 2006005580 W KR2006005580 W KR 2006005580W WO 2007073087 A1 WO2007073087 A1 WO 2007073087A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- parts
- binder
- weight
- tray
- polymer
- Prior art date
Links
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 46
- 239000011230 binding agent Substances 0.000 claims description 27
- -1 acryl Chemical group 0.000 claims description 25
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 22
- 229920001940 conductive polymer Polymers 0.000 claims description 18
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 16
- 239000011248 coating agent Substances 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011256 inorganic filler Substances 0.000 claims description 13
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 229920001577 copolymer Polymers 0.000 claims description 10
- 238000003856 thermoforming Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 8
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000005060 rubber Substances 0.000 claims description 7
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 4
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 2
- 229920005822 acrylic binder Polymers 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims description 2
- 230000003078 antioxidant effect Effects 0.000 claims description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 239000003086 colorant Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 239000010433 feldspar Substances 0.000 claims description 2
- 239000005350 fused silica glass Substances 0.000 claims description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 2
- 150000003949 imides Chemical class 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 229920000553 poly(phenylenevinylene) Polymers 0.000 claims description 2
- 229920000767 polyaniline Polymers 0.000 claims description 2
- 229920000128 polypyrrole Polymers 0.000 claims description 2
- 229920000123 polythiophene Polymers 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 11
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 17
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 230000035939 shock Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 6
- 238000010998 test method Methods 0.000 description 6
- 229920005669 high impact polystyrene Polymers 0.000 description 5
- 239000004797 high-impact polystyrene Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000005062 Polybutadiene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 229960004592 isopropanol Drugs 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920002285 poly(styrene-co-acrylonitrile) Polymers 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 239000011877 solvent mixture Substances 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007756 gravure coating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011369 resultant mixture Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 239000005456 alcohol based solvent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
- H05K13/0084—Containers and magazines for components, e.g. tube-like magazines
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/06—Dyes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/20—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain
- D01F6/22—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of cyclic compounds with one carbon-to-carbon double bond in the side chain from polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/08—Copolymers of styrene
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
Definitions
- the present invention relates to an antistatic tray for electronic parts, which can be used in environments of extreme temperature and humidity, and in particular, to a sheet, which is used to produce a tray for electronic parts without dimensional changes, including distortion or contraction, in an environment of extreme temperatures ranging from -5O 0 C to 85 0 C and relative humidity of 10-90%, and also without the generation of impurities from the surface of the tray upon a vibration test in a state in which the parts are mounted, and to a tray produced using the same.
- Various electronic part modules must be transported using a tray that has been subjected to permanent antistatic treatment in order to decrease damage due to the generation of static electricity during transport and handling.
- the trays in which the electronic parts are contained may pass through the hottest regions near the equator, where the temperature can be as high as 85 0 C or relative humidity can reach a maximum of 90%, or through the coldest regions, where the temperature in the winter season is decreased to about -5O 0 C or the relative humidity is decreased to about 10%, or otherwise, may be stored in such extreme environments. In such cases, attributable to the dimensional change of the material for trays, the packaged parts may be damaged.
- a styrene polymer is a typical polymer that can be easily produced into a tray through a thermoforming process using a thermoforming machine.
- a general styrene polymer including general-purpose polystyrene or high impact polystyrene, has low heat resistance in its form, and thus cannot be used in the hottest and coldest regions. It is also difficult for a binary styrene polymer, modified using a component of butadiene, acryl or acrylonitrile, to satisfy the above requirements.
- a styrene copolymer including butadiene it has problems in which heat resistance is drastically decreased depending on the amount of the butadiene component, and thus it cannot be used.
- a styrene copolymer, modified using a component of acryl or acrylonitrile has too little elongation and is thus highly brittle, and consequently cannot be used unchanged.
- an object of the present invention is to provide a sheet for use in a tray for electronic parts to which dimensional changes or distortion are not caused even under extreme conditions, including the hottest temperature, the coldest temperature and very low relative humidity, while almost no black impurities are generated due to friction between an electronic part and a tray during transport, and also to provide a tray produced using the same.
- styrene copolymers used is a styrene polymer, which is modified using an acrylonitrile or acryl component to increase heat resistance, and is furthermore modified using a butadiene or acryl rubber component to eliminate a problem of high brittleness due to too little elongation.
- the styrene copolymers in the case of the styrene polymer modified using the acrylonitrile component or acryl component, the heat resistance is increased depending on the amount of the above component. Thereby, it is possible to prepare a sheet for forming a tray, which satisfies the requirements for heat resistant and cold resistance.
- the extent of heat resistance varies depending on the range of the amount of the above component.
- heat resistance may be increased, however, polystyrene itself is a highly brittle polymer, and furthermore, even if the above component is added to thus increase heat resistance, the resultant mixture or copolymer is also very brittle.
- the acryl or butadiene rubber component should be further added or copolymerized, so that the resultant mixture or copolymer can withstand a thermal shock test comprising tens of cycles of temperature shifts in the temperature range from -5O 0 C to 85 0 C, without undergoing distortion or dimensional changes.
- the present invention uses a styrene polymer, which is designed in the form of a ternary styrene polymer using the acrylonitrile or acryl component to enhance heat resistance, and furthermore, using the acryl or butadiene rubber component to exhibit cold resistance.
- a polymer sheet may be designed using a process in which a component for helping heat dissipate, that is, an inorganic filler, is added.
- the styrene polymer modified using the acrylonitrile component includes a styrene- acrylonitrile copolymer or a styrene-acrylonitrile copolymer and an acrylonitrile - butadiene-styrene terpolymer.
- the styrene-acrylonitrile copolymer has excellent heat resistance but has too little elongation, and therefore cannot be used unchanged.
- the acryl or butadiene rubber component is further used, or a polymer containing both acrylonitrile and rubber, for example, an acry- lonitrile-butadiene- styrene terpolymer, is used.
- the same principle is applied.
- the molar ratio of the amount of acrylonitrile or acryl component, the amount of butadiene or acryl rubber component, and the amount of styrene component should be adjusted to be within the range of (5 ⁇ 30):(5 ⁇ 30):(40 ⁇ 90).
- the acrylonitrile or acryl component is used at a molar ratio less than 5, the effect of enhancement of tensile strength or heat resistance is insignificant.
- the amount thereof exceeds 30 parts by weight, brittleness is undesirably increased.
- the butadiene or acryl rubber component which is used for heat resistance enhancement and impact reinforcement, is used at a molar ratio less than 5, the effect of impact reinforcement is insignificant.
- the amount thereof exceeds 30 parts by weight, elongation is excessively increased, that is, ductility becomes too high.
- styrene-based antistatic tray which withstands the thermal shock of repeated heating and cooling between -5O 0 C and 85 0 C, generates no impurities during transport, and is easily subjected to thermoforming.
- an inorganic filler including a silica filler such as fused silica or precipitated silica, a titanate filler such as titanium dioxide, talc (Mg Si O (OH) ), mica (XY Z O
- the amount of the inorganic filler is added in an amount of 0.5-30 parts by weight.
- the amount of the inorganic filler is less than 0.5 parts by weight, the effect of heat transfer due to the inorganic filler is insignificant.
- the amount of the filler exceeds 30 parts by weight, it is difficult to perform an extrusion process and a process of thermoforming the extruded polymer sheet. As the amount of the inorganic filler is increased, it is difficult to perform thermoforming, and therefore the sharp corner portion cannot be expected to be precisely shaped upon thermoforming. Consequently, it is preferable that the amount of the inorganic filler be in the range of 1-5 parts by weight.
- the tray Upon the addition of the inorganic filler, if 0.001-5 parts by weight of a colorant is added, the tray can exhibit a desired color, which is more effective.
- an antistatic coating layer including a conductive polymer as an effective component is conducted as follows. First, 0.02-10 parts by weight of a conductive polymer, 5-40 parts by weight of a binder, and 50-94.98 parts by weight of a solvent are mixed. Preferably, 0.1-5 parts by weight of a dispersant, 0.1-5 parts by weight of a thickener, 0.01-0.1 parts by weight of a lubricant, and 0.01-5 parts by weight of an antioxidant, based on 100 parts by weight of the coating solution, are further included, thus preparing a conductive polymer coating solution having a total solid content of 0.1-10%. The coating solution thus prepared is applied on the surface of the polymer sheet and is then dried at 30 ⁇ 150°C for 0.5-5 min, thereby forming an antistatic layer 0.05-5 D thick.
- the conductive polymer used in the preparation of the antistatic coating solution of the present invention includes polyaniline, polypyrrole, polythiophene, polyphenylene vinylene, or modified conductive polymers derived therefrom.
- polyaniline polypyrrole
- polythiophene polythiophene
- polyphenylene vinylene or modified conductive polymers derived therefrom.
- polyethylenedioxythiophene which is a conductive polymer available from H.C.Starck, Germany.
- the binder usable in the present invention may be one or more selected from among an acrylic binder, a urethane binder, an epoxy binder, an amide binder, an imide binder, a hydroxyl binder, a carboxylic acid binder, an ester binder, and mixtures thereof.
- an acrylic binder a urethane binder
- an epoxy binder an epoxy binder
- an amide binder an imide binder
- a hydroxyl binder a carboxylic acid binder
- an ester binder and mixtures thereof.
- the dispersant includes silicon compounds or fluorine compounds
- the thickener includes cellulose compounds, acryl compounds, or urethane compounds.
- the solvent may be any one or a mixture of two or more selected from among various solvents, including water, alcohol solvents having 4 or fewer carbons, ketone solvents having 5 or fewer carbons, toluene, xylene, cresol, chloroform, N- methylpyrrolidinone, acetate solvents, and cellosolve solvents.
- the process of applying the conductive polymer on the surface of the polymer sheet includes, for example, gravure coating, reverse gravure coating, roll coating, bar coating, comma coating, etc.
- a combination process including dip coating or spray coating and then leveling using a bar coater may be used.
- Comparative Example 1 a high impact polystyrene mixture including 25 parts by weight of carbon black, commercially available, was subjected to thermoforming to thus produce a tray, which was then subjected to a thermal hysteresis test and a vibration test.
- the surface resistivity of the tray was measured to be 10 ohm/sq, which is considered to be a good antistatic property.
- results of a thermal shock test comprising 30 cycles of heating and cooling between -5O 0 C and 85 0 C, the dimensions of the tray were observed to decrease.
- great amounts of impurities were detected.
- a phenomenon in which the tray was partially distorted did not occur. This is believed to be because heat applied to the tray is efficiently dissipated by carbon black included in the styrene resin.
- Example 1 with the exception that a commercially available sheet, three layer extruded at a thickness ratio of 10:80:10, in which the middle layer was composed of high impact polystyrene and the surface layer was composed of high impact polystyrene containing a surfactant as an antistatic agent, was subjected to thermoforming to thus produce a tray. [26] The tray thus produced was subjected to a thermal shock test as in Comparative Example 1. As the results, a phenomenon in which the tray was partially distorted occurred.
- the antistatic coating solution used in Comparative Examples 3-4 and Examples 1-3 of Table 1 below was prepared by mixing 5 parts by weight of Baytron PH which is a conductive polymer available from H. C. Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
- Baytron PH which is a conductive polymer available from H. C. Starck, Germany
- a urethane binder 20 parts by weight of a urethane binder
- a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1
- the antistatic coating solution used in Comparative Examples 5-6 and Examples 4-6 of Table 2 below was prepared by mixing 5 parts by weight of Baytron PH, which is a conductive polymer available from Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
- Baytron PH which is a conductive polymer available from Starck, Germany
- a urethane binder 20 parts by weight of a urethane binder
- a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1
- Example 7 a polymer sheet having a predetermined amount of acrylic inorganic filler of the present invention was used. The test methods were the same as in Comparative Example 1.
- the antistatic coating solution used in Example 7 of Table 3 below was prepared by mixing 5 parts by weight of Baytron PH, which is a conductive polymer available from H. C. Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
- Baytron PH which is a conductive polymer available from H. C. Starck, Germany
- a urethane binder 20 parts by weight of a urethane binder
- a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1
- a sheet for use in extreme environments and a tray for electronic parts produced using the same can assure the dimensional stability of the tray even under conditions of rapid changes in temperature and humidity during the transport and storage of electronic parts, thus preventing damage to the parts in the tray.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Packaging Frangible Articles (AREA)
- Laminated Bodies (AREA)
Abstract
Disclosed is an antistatic tray for electronic parts, which is usable in environments of extreme temperature and humidity. A polymer sheet, which is used to produce a tray for electronic parts, having dimensional stability related to the distortion, contraction and etc. of the tray under extreme conditions between -50 °C and 85 °C and without the generation of impurities from the surface thereof during a vibration test in a state in which the parts are mounted, and a tray for electronic parts, which is imparted with permanent antistatic performance by forming a permanent antistatic layer on the surface of the sheet, are provided. The tray for electronic parts is imparted with permanent antistatic performance to thus inhibit electrostatic damage, and the dimensional stability of the tray is assured even under conditions of rapid changes in temperature and humidity during transport and storage, thus preventing damage to the parts in the tray.
Description
Description
SHEET FOR USING IN EXTREME ENVIRONMENTS AND TRAY FOR ELECTRONIC PARTS PRODUCED THEREFROM
Technical Field
[1] The present invention relates to an antistatic tray for electronic parts, which can be used in environments of extreme temperature and humidity, and in particular, to a sheet, which is used to produce a tray for electronic parts without dimensional changes, including distortion or contraction, in an environment of extreme temperatures ranging from -5O0C to 850C and relative humidity of 10-90%, and also without the generation of impurities from the surface of the tray upon a vibration test in a state in which the parts are mounted, and to a tray produced using the same. Background Art
[2] Various electronic part modules must be transported using a tray that has been subjected to permanent antistatic treatment in order to decrease damage due to the generation of static electricity during transport and handling. The trays in which the electronic parts are contained may pass through the hottest regions near the equator, where the temperature can be as high as 850C or relative humidity can reach a maximum of 90%, or through the coldest regions, where the temperature in the winter season is decreased to about -5O0C or the relative humidity is decreased to about 10%, or otherwise, may be stored in such extreme environments. In such cases, attributable to the dimensional change of the material for trays, the packaged parts may be damaged.
[3] Conventional trays have been produced using a polymer sheet extruded from a styrene polymer or high impact polystyrene mixture essentially including 20-30 parts by weight of carbon black. However, since this tray material has a large amount of carbon black in order to prevent static electricity from being generated, there are problems in which black impurities are generated due to friction between the electronic part and the surface of the packaging material during transport. Recently, in order to impart the tray with antistatic performance, an antistatic coating layer including a conductive polymer as an effective component is applied, instead of using carbon black.
[4] A styrene polymer is a typical polymer that can be easily produced into a tray through a thermoforming process using a thermoforming machine. A general styrene polymer, including general-purpose polystyrene or high impact polystyrene, has low heat resistance in its form, and thus cannot be used in the hottest and coldest regions. It is also difficult for a binary styrene polymer, modified using a component of
butadiene, acryl or acrylonitrile, to satisfy the above requirements. For example, in the case of a styrene copolymer including butadiene, it has problems in which heat resistance is drastically decreased depending on the amount of the butadiene component, and thus it cannot be used. In addition, a styrene copolymer, modified using a component of acryl or acrylonitrile, has too little elongation and is thus highly brittle, and consequently cannot be used unchanged.
[5] Accordingly, there is a need to invent a sheet to which dimensional changes or distortion are not caused even under extreme conditions, including the coldest temperature (-5O0C), the hottest temperature (850C), and very low relative humidity (10 RH%), while almost no black impurities are generated due to friction between the packaged part and the tray during transport, and also to invent a tray produced using the same.
Disclosure of Invention Technical Problem
[6] Therefore, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a sheet for use in a tray for electronic parts to which dimensional changes or distortion are not caused even under extreme conditions, including the hottest temperature, the coldest temperature and very low relative humidity, while almost no black impurities are generated due to friction between an electronic part and a tray during transport, and also to provide a tray produced using the same.
Technical Solution
[7] In order to achieve the above object, in the present invention, among styrene copolymers, used is a styrene polymer, which is modified using an acrylonitrile or acryl component to increase heat resistance, and is furthermore modified using a butadiene or acryl rubber component to eliminate a problem of high brittleness due to too little elongation. Among the styrene copolymers, in the case of the styrene polymer modified using the acrylonitrile component or acryl component, the heat resistance is increased depending on the amount of the above component. Thereby, it is possible to prepare a sheet for forming a tray, which satisfies the requirements for heat resistant and cold resistance. However, in the case of the styrene polymer modified using the acrylonitrile or acryl component, the extent of heat resistance varies depending on the range of the amount of the above component. In the case of the styrene polymer modified using only this component, heat resistance may be increased, however, polystyrene itself is a highly brittle polymer, and furthermore, even if the above component is added to thus increase heat resistance, the resultant mixture or copolymer is also very brittle. Hence, in order to eliminate such problems, the acryl or butadiene
rubber component should be further added or copolymerized, so that the resultant mixture or copolymer can withstand a thermal shock test comprising tens of cycles of temperature shifts in the temperature range from -5O0C to 850C, without undergoing distortion or dimensional changes.
[8] With the goal of satisfying heat resistance and cold resistance, the present invention uses a styrene polymer, which is designed in the form of a ternary styrene polymer using the acrylonitrile or acryl component to enhance heat resistance, and furthermore, using the acryl or butadiene rubber component to exhibit cold resistance. Additionally, a polymer sheet may be designed using a process in which a component for helping heat dissipate, that is, an inorganic filler, is added.
[9] The styrene polymer modified using the acrylonitrile component includes a styrene- acrylonitrile copolymer or a styrene-acrylonitrile copolymer and an acrylonitrile - butadiene-styrene terpolymer. Among these polymers, the styrene-acrylonitrile copolymer has excellent heat resistance but has too little elongation, and therefore cannot be used unchanged. Thus, the acryl or butadiene rubber component is further used, or a polymer containing both acrylonitrile and rubber, for example, an acry- lonitrile-butadiene- styrene terpolymer, is used. In the case of the copolymer or mixture modified using the acryl component, the same principle is applied. As such, in the final styrene mixture of copolymer, the molar ratio of the amount of acrylonitrile or acryl component, the amount of butadiene or acryl rubber component, and the amount of styrene component should be adjusted to be within the range of (5~30):(5~30):(40~90). When the acrylonitrile or acryl component is used at a molar ratio less than 5, the effect of enhancement of tensile strength or heat resistance is insignificant. On the other hand, when the amount thereof exceeds 30 parts by weight, brittleness is undesirably increased. Further, when the butadiene or acryl rubber component, which is used for heat resistance enhancement and impact reinforcement, is used at a molar ratio less than 5, the effect of impact reinforcement is insignificant. On the other hand, if the amount thereof exceeds 30 parts by weight, elongation is excessively increased, that is, ductility becomes too high.
Advantageous Effects
[10] According to the technique of the present invention, provided is a styrene-based antistatic tray, which withstands the thermal shock of repeated heating and cooling between -5O0C and 850C, generates no impurities during transport, and is easily subjected to thermoforming. Mode for the Invention
[11] When excessive heat or cold is locally applied to a polymer having very low heat transfer rate, such heat is not dissipated to the surroundings, and thus, a polymer sheet
itself or a tray formed therefrom may be distorted due to the difference in the temperature upon the temperature shift between a high temperature and a low te mperature. To prevent this problem, the locally applied heat or cooling temperature must be rapidly dissipated to the surroundings. As such, when an inorganic filler is uniformly dispersed in the polymer, heat transfer is achieved through the inorganic filler particles, thus making it possible to prevent local overheating or overcooling. To this end, an inorganic filler, including a silica filler such as fused silica or precipitated silica, a titanate filler such as titanium dioxide, talc (Mg Si O (OH) ), mica (XY Z O
(OH,F) ), feldspar, calcium carbonate, calcium oxide, or magnesium oxide, is added in an amount of 0.5-30 parts by weight. When the amount of the inorganic filler is less than 0.5 parts by weight, the effect of heat transfer due to the inorganic filler is insignificant. On the other hand, when the amount of the filler exceeds 30 parts by weight, it is difficult to perform an extrusion process and a process of thermoforming the extruded polymer sheet. As the amount of the inorganic filler is increased, it is difficult to perform thermoforming, and therefore the sharp corner portion cannot be expected to be precisely shaped upon thermoforming. Consequently, it is preferable that the amount of the inorganic filler be in the range of 1-5 parts by weight.
[12] Upon the addition of the inorganic filler, if 0.001-5 parts by weight of a colorant is added, the tray can exhibit a desired color, which is more effective.
[13] On the surface of the styrene polymer sheet thus prepared, the process of forming an antistatic coating layer including a conductive polymer as an effective component is conducted as follows. First, 0.02-10 parts by weight of a conductive polymer, 5-40 parts by weight of a binder, and 50-94.98 parts by weight of a solvent are mixed. Preferably, 0.1-5 parts by weight of a dispersant, 0.1-5 parts by weight of a thickener, 0.01-0.1 parts by weight of a lubricant, and 0.01-5 parts by weight of an antioxidant, based on 100 parts by weight of the coating solution, are further included, thus preparing a conductive polymer coating solution having a total solid content of 0.1-10%. The coating solution thus prepared is applied on the surface of the polymer sheet and is then dried at 30~150°C for 0.5-5 min, thereby forming an antistatic layer 0.05-5 D thick.
[14] The conductive polymer used in the preparation of the antistatic coating solution of the present invention includes polyaniline, polypyrrole, polythiophene, polyphenylene vinylene, or modified conductive polymers derived therefrom. In consideration of environmental contamination and toxicity problems, particularly preferable is the use of polyethylenedioxythiophene, which is a conductive polymer available from H.C.Starck, Germany.
[15] The binder usable in the present invention may be one or more selected from among an acrylic binder, a urethane binder, an epoxy binder, an amide binder, an imide
binder, a hydroxyl binder, a carboxylic acid binder, an ester binder, and mixtures thereof. In some cases, when various silicate and titanate binders are used together with an organic binder, the coating film becomes harder, which is more effective.
[16] The dispersant includes silicon compounds or fluorine compounds, and the thickener includes cellulose compounds, acryl compounds, or urethane compounds. Also, the solvent may be any one or a mixture of two or more selected from among various solvents, including water, alcohol solvents having 4 or fewer carbons, ketone solvents having 5 or fewer carbons, toluene, xylene, cresol, chloroform, N- methylpyrrolidinone, acetate solvents, and cellosolve solvents.
[17] The process of applying the conductive polymer on the surface of the polymer sheet includes, for example, gravure coating, reverse gravure coating, roll coating, bar coating, comma coating, etc. In addition, a combination process including dip coating or spray coating and then leveling using a bar coater may be used.
[18] Below, the present invention is described in detail through the following examples, which are set forth to illustrate, but are not to be construed to limit the scope of the present invention.
[19]
[20] <Comparative Example 1>
[21] In Comparative Example 1, a high impact polystyrene mixture including 25 parts by weight of carbon black, commercially available, was subjected to thermoforming to thus produce a tray, which was then subjected to a thermal hysteresis test and a vibration test.
[22] The surface resistivity of the tray was measured to be 10 ohm/sq, which is considered to be a good antistatic property. As results of a thermal shock test comprising 30 cycles of heating and cooling between -5O0C and 850C, the dimensions of the tray were observed to decrease. Further, upon a vibration test through 60 back- and-forth movements of a distance of 1 cm, great amounts of impurities were detected. However, a phenomenon in which the tray was partially distorted did not occur. This is believed to be because heat applied to the tray is efficiently dissipated by carbon black included in the styrene resin.
[23]
[24] <Comparative Example 2>
[25] Comparative Example 2 was conducted in the same manner as Comparative
Example 1, with the exception that a commercially available sheet, three layer extruded at a thickness ratio of 10:80:10, in which the middle layer was composed of high impact polystyrene and the surface layer was composed of high impact polystyrene containing a surfactant as an antistatic agent, was subjected to thermoforming to thus produce a tray.
[26] The tray thus produced was subjected to a thermal shock test as in Comparative Example 1. As the results, a phenomenon in which the tray was partially distorted occurred.
[27] In Comparative Examples 1 and 2, the conventional resin containing carbon black withstood the thermal shock test, but great amounts of black impurities were detected in the vibration test. Therefore, the above trays were unsuitable for use as a tray that must withstand the thermal shock test without generating black impurities in the vibration test, as is required in the present invention.
[28] [29] <Comparative Examples 3-4, Examples 1~3> [30] In Comparative Examples 3-4 and Examples 1-3, polymer sheets having various molar ratios of acrylonitrile, butadiene, and styrene components of the present invention were used. The test methods were the same as in Comparative Example 1.
[31] The antistatic coating solution used in Comparative Examples 3-4 and Examples 1-3 of Table 1 below was prepared by mixing 5 parts by weight of Baytron PH which is a conductive polymer available from H. C. Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
[32] Table 1
[33] : molar ratio of respective components in a final compound, : test method: ASTM D3359, 3: ESD STM 11.11
[34] O: No, X: Yes [35] [36] <Comparative Examples 5-6, Examples 4~6> [37] In Comparative Examples 5-6 and Examples 4-6, polymer sheets having various molar ratios of acryl, butadiene, and styrene components of the present invention were used. The test methods were the same as in Comparative Example 1.
[38] The antistatic coating solution used in Comparative Examples 5-6 and Examples 4-6 of Table 2 below was prepared by mixing 5 parts by weight of Baytron PH, which is a conductive polymer available from Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
[39] Table 2
1 9
[40] : molar ratio of respective components in a final compound, : test method: ASTM D3359, 3: ESD STM 11.11
[41] O: No, X: Yes [42] [43] As is apparent from the results of Comparative Examples 3-6 and Examples 1-6, when the amount of the acrylonitrile or acryl component was 5% or more and the amount of the butadiene or acryl rubber component was about 30%, neither dimensional changes nor distortion were observed in the thermal shock test. Further, in the vibration test, there was no generation of black impurities. Furthermore, when the antistatic layer including the conductive polymer, that is, polyethylenedioxythiophene, as an effective component, was formed on the surface of the above material, the surface resistivity was measured to be 10 ohm/sq, which is considered to be very good antistatic performance.
[44] [45] <Example 7> [46] In Example 7, a polymer sheet having a predetermined amount of acrylic inorganic filler of the present invention was used. The test methods were the same as in Comparative Example 1.
[47] The antistatic coating solution used in Example 7 of Table 3 below was prepared by mixing 5 parts by weight of Baytron PH, which is a conductive polymer available from H. C. Starck, Germany, 20 parts by weight of a urethane binder, and 0.4 parts by
weight of a dispersant with 74.6 parts by weight of a solvent mixture comprising ethylalcohol and isopropylalcohol mixed at 1:1, was applied on the polymer sheet, and was then dried, thereby forming an antistatic layer 1 D thick.
[48] Table 3
1 9
[49] : molar ratio of respective components in a final compound, : test method: ASTM D3359, 3: ESD STM 11.11
[50] O: No, X: Yes [51] [52] As is apparent from the results of Example 7, in the case of using 5% of the acry- lonitrile or acryl component, 15% of the butadiene or acryl rubber component, 80% of the styrene component, and 2 parts by weight of the inorganic filler (talc), neither dimensional changes nor distortion were observed in the thermal shock test. In addition, in the vibration test, there was no generation of black impurities. When the antistatic layer including the conductive polymer, that is, polyethylenedioxythiophene, as an effective component, was formed on the surface of the above material, the surface resistivity was measured to be 10 ohm/sq, which is considered to be very good antistatic performance. Industrial Applicability
[53] According to the present invention, a sheet for use in extreme environments and a tray for electronic parts produced using the same can assure the dimensional stability of the tray even under conditions of rapid changes in temperature and humidity during the transport and storage of electronic parts, thus preventing damage to the parts in the tray.
Claims
[1] A polymer sheet for thermoforming, comprising a styrene mixture or copolymer, in which an acrylonitrile or acryl component, a butadiene or acryl rubber component, and a styrene component are ultimately included at a molar ratio of (5~30):(5~30):(40~90).
[2] The polymer sheet according to claim 1, wherein 0.5-30 parts by weight of an inorganic filler is included in order to transfer heat to the mixture or copolymer.
[3] The polymer sheet according to claim 1 or 2, wherein 0.001-5 parts by weight of a colorant is added so that a predetermined color is exhibited.
[4] The polymer sheet according to claim 2 or 3, wherein the inorganic filler is one or more selected from among a silica filler, including fused silica or precipitated silica, a titanate filler, including titanium dioxide, talc, mica, feldspar, calcium carbonate, calcium oxide, and magnesium oxide.
[5] The polymer sheet according to claims 1 to 4, wherein an antistatic coating layer including a conductive polymer as an effective component is formed on the sheet.
[6] The polymer sheet according to claim 5, wherein the antistatic coating layer is formed by applying a coating solution comprising 0.02-10 parts by weight of the conductive polymer, 5-40 parts by weight of a binder, and 50-94.98 parts by weight of a solvent.
[7] The polymer sheet according to claim 6, wherein the coating solution further comprises 0.1-5 parts by weight of a dispersant, 0.1-5 parts by weight of a thickener, 0.01-0.1 parts by weight of a lubricant, and 0.01-5 parts by weight of an antioxidant, based on 100 parts by weight thereof, to thus prepare a conductive polymer coating solution having a total solid content of 0.1-10%.
[8] The polymer sheet according to any one of claims 5 to 7, wherein the conductive polymer is polyaniline, polypyrrole, polythiophene, polyphenylene vinylene, or a modified conductive polymer, including polyethylenedioxythiophene, derived therefrom.
[9] The polymer sheet according to any one of claims 6 to 8, wherein the binder is one or more selected from among an acrylic binder, a urethane binder, an epoxy binder, an amide binder, an imide binder, a hydroxyl binder, a carboxylic acid binder, an ester binder, and a multifunctional binder thereof, or comprises a silicate binder and a titanate binder mixed with an organic binder.
[10] A tray, produced by thermoforming the sheet of any one of claims 1 to 9, to thus have heat resistance and cold resistance and less dimensional change and distortion at low relative humidity.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2005-0125881 | 2005-12-19 | ||
KR1020050125881A KR100649887B1 (en) | 2005-12-19 | 2005-12-19 | Sheet for using in extreme environments and tray for electronic parts produced therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007073087A1 true WO2007073087A1 (en) | 2007-06-28 |
Family
ID=37713589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2006/005580 WO2007073087A1 (en) | 2005-12-19 | 2006-12-19 | Sheet for using in extreme environments and tray for electronic parts produced therefrom |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR100649887B1 (en) |
WO (1) | WO2007073087A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458060A (en) * | 2017-07-20 | 2017-12-12 | 南通梵圣纺织品有限公司 | A kind of Efficient textile product processing technology |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01124685A (en) * | 1987-11-06 | 1989-05-17 | Toray Ind Inc | High heat insulating fiber sheet |
KR20000049998A (en) * | 2000-05-10 | 2000-08-05 | 김진원 | Novel natural fabric coated with anti-electrostatic agent and process of preparation thereof |
KR20030060464A (en) * | 2002-01-09 | 2003-07-16 | (주)우노파이버 | Synthetic Hair Comprising Polyvinylchloride and Method of Preparing the Same |
KR20050067112A (en) * | 2005-05-23 | 2005-06-30 | 서광석 | Plastic sheet having enhanced formability for carrier tape |
-
2005
- 2005-12-19 KR KR1020050125881A patent/KR100649887B1/en active IP Right Grant
-
2006
- 2006-12-19 WO PCT/KR2006/005580 patent/WO2007073087A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01124685A (en) * | 1987-11-06 | 1989-05-17 | Toray Ind Inc | High heat insulating fiber sheet |
KR20000049998A (en) * | 2000-05-10 | 2000-08-05 | 김진원 | Novel natural fabric coated with anti-electrostatic agent and process of preparation thereof |
KR20030060464A (en) * | 2002-01-09 | 2003-07-16 | (주)우노파이버 | Synthetic Hair Comprising Polyvinylchloride and Method of Preparing the Same |
KR20050067112A (en) * | 2005-05-23 | 2005-06-30 | 서광석 | Plastic sheet having enhanced formability for carrier tape |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107458060A (en) * | 2017-07-20 | 2017-12-12 | 南通梵圣纺织品有限公司 | A kind of Efficient textile product processing technology |
Also Published As
Publication number | Publication date |
---|---|
KR100649887B1 (en) | 2006-11-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI602910B (en) | Systems, structures and materials for electronic device cooling | |
US5428100A (en) | Liquid crystal polyester resin composition and molded article | |
KR100902033B1 (en) | Manufacturing method of anti-static polyester film | |
JP5444707B2 (en) | Method for producing antistatic polyester film, antistatic polyester film produced by the method, and use thereof | |
WO2003074601A2 (en) | Printing of organic conductive polymers containing additives | |
KR102559995B1 (en) | Heat-curing antistatic agent, cured coating thereof and plastic film | |
JP4922569B2 (en) | Antistatic coating composition, antistatic film formed by applying the composition, and method for producing the same | |
KR100715554B1 (en) | Antistatic polymer films with improved antistatic properties | |
KR100902034B1 (en) | Manufacturing method of anti-static polyester film | |
KR20020016549A (en) | Antistatic coating composition | |
JP2008179809A (en) | Antistatic material and antistatic film | |
KR20190054095A (en) | Silver paste for flexible substrate | |
WO2007073087A1 (en) | Sheet for using in extreme environments and tray for electronic parts produced therefrom | |
KR102360000B1 (en) | Thermoplastic resin composition and molded product using the same | |
JP2005281704A (en) | Antistatic coating composition | |
US10227426B2 (en) | Antistatic polymers and methods of making the same | |
CN108129794B (en) | Styrene polymer-based conductive master batch based on carbon nanotube and graphene compound system and preparation method thereof | |
KR101382784B1 (en) | Biodegradable sheet having an antistatic finishing property and excellent shock and heat resistance and manufacturing method thereof | |
KR102640877B1 (en) | Conductive solution composition and conductive structure using the same | |
KR20190129812A (en) | Conductive coating composition for anti-static and anti-static sheet applying the same | |
JP3392285B2 (en) | Flame retardant thermoplastic adhesive for insulation tape | |
KR101671564B1 (en) | Thermal conductive composition for dual bonding having improved adhesive property with substrate | |
JP3318410B2 (en) | Cyclic olefin resin composition | |
JP2654078B2 (en) | Antistatic resin composition | |
JPH01259052A (en) | Antistatic resin composition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC; EPO FORM 1205A DATED 26.08.2008 |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 06835287 Country of ref document: EP Kind code of ref document: A1 |