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Pressure-sensitive adhesive label for hard disk driveRelated Patent Categories: Stock Material Or Miscellaneous Articles, Layer Or Component Removable To Expose AdhesivePressure-sensitive adhesive label for hard disk drive description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070104913, Pressure-sensitive adhesive label for hard disk drive. Brief Patent Description - Full Patent Description - Patent Application Claims
[0001] The present application is a Divisional of co-pending application Ser. No. 11/000,203, filed on Dec. 1, 2004, which is a Divisional of co-pending application Ser. No. 10/127,724, filed on Apr. 23, 2002, now U.S. Pat. No. 6,903,898, issued Jun. 7, 2005, and for which priority is claimed under 35 U.S.C. .sctn. 120; and this application claims priority of Application Nos. 2001-123792, 2001-125514, 2001-125515 and 2001-128552 filed in Japan on Apr. 23, 2001, Apr. 24, 2001, Apr. 24, 2001 and Apr. 26, 2001, respectively, under 35 U.S.C. .sctn. 119; the entire contents of all are hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a pressure-sensitive adhesive label for a hard disk drive, which is used in a state that the pressure-sensitive adhesive label is stuck on the outer surface of a housing of a hard disk drive so as to exert a function of various indications as a primary function of a pressure-sensitive adhesive label and so as to reduce noise generated when the hard disk drive is driven. [0004] 2. Description of the Related Art [0005] In recent years, there is a greatly increasing demand for civilian hard disk drives for use in personal computers and so on. Along with this demand, a property of miniaturization of the hard disk drive itself and a property of reduction in generated noise (securement of silence) at the time of driving of the hard disk drive have been treated to be as important as the property of increase in storage capacity. [0006] As a measure to reduce noise generated when a hard disk drive is driven, a vibration damping steel sheet is generally used on a part (for example, a cover) of a housing of the hard disk drive. However, the method using a vibration damping steel sheet cannot yet be rated as a satisfactory measure from the point of view of reduction in size and weight, reduction in noise, productivity or cost particularly for a hard disk drive having recording disks each with a diameter not larger than 2.5 inches. [0007] Therefore, the present inventor et al. proposed a pressure-sensitive adhesive label for a hard disk drive (hereinafter, occasionally referred to as "HDD pressure-sensitive adhesive label") which was stuck on the outer surface of a housing of a hard disk drive so as to reduce noise generated when the hard disk drive was driven. By use of such an HDD pressure-sensitive adhesive label, reduction in noise can be attained while the information indication function is exerted. The HDD pressure-sensitive adhesive label has a pressure-sensitive adhesive layer normally coated (protected) with a release liner until the HDD pressure-sensitive adhesive label is used (stuck). When the HDD pressure-sensitive adhesive label is used, the release liner is released to expose the surface of the pressure-sensitive adhesive layer, and then the HDD pressure-sensitive adhesive label is stuck onto the outer surface of a housing of a hard disk drive. [0008] On the other hand, a precision electronic apparatus such as a hard disk drive may be broken due to weak static electricity. Such a precision electronic apparatus is required to be prevented from being broken by static electricity. [0009] In the HDD pressure-sensitive adhesive label, however, static electricity may be generated to cause peeling electrification when the release liner coating the pressure-sensitive adhesive layer is released from the HDD pressure-sensitive adhesive label. There is a possibility that a weak current generated at this time causes a failure in the precision electronic apparatus. Therefore, the HDD pressure-sensitive adhesive label is required to have a small amount of peeling electrification generated when the release liner is released. [0010] Further, in the HDD pressure-sensitive adhesive label, however, damage such as curling in the HDD pressure-sensitive adhesive label as a whole or wrinkles produced therein comes into problem when the release liner coating the pressure-sensitive adhesive layer is released. It is therefore necessary to prevent such damage when the release liner is released. Further, when the HDD pressure-sensitive adhesive label in which the release liner has been released to expose the pressure-sensitive adhesive layer is to be stuck onto a hard disk drive, it is difficult to position the place where the HDD pressure-sensitive adhesive label is to be stuck on the hard disk drive because the pressure-sensitive adhesive layer has been exposed thoroughly. Accordingly, the workability in sticking the HDD pressure-sensitive adhesive label is low. Further, with weight reduction in the hard disk drive, reduction in thickness of the pressure-sensitive adhesive label is demanded accordingly. Along with this demand, it is anticipated that the pressure-sensitive adhesive label will be damaged easily when release liner is released. Thus, the solution to the problems is required more and more strongly. [0011] On the other hand, in recent years, a product in which a hard disk drive has been incorporated, for example, various computer equipment such as a personal computer or a server or household appliances as a video/audio recording apparatus, are dissassembled after retirement so that various parts are reused (recycled). [0012] HDD pressure-sensitive adhesive labels are, however, stuck on hard disk drives manually or automatically by machines. For example, when a wrong HDD pressure-sensitive adhesive label is stuck, the HDD pressure-sensitive adhesive label has to be peeled after the sticking. Further, when hard disk drives are reused, HDD pressure-sensitive adhesive labels stuck on the hard disk drives have to be peeled. In spite of such increasing necessity to peel HDD pressure-sensitive adhesive labels which have been stuck, it is difficult to peel, with ease, the related-art HDD pressure-sensitive adhesive labels after the HDD pressure-sensitive adhesive labels have been once stuck. Thus, there has occurred a problem that the workability in peeling the HDD pressure-sensitive adhesive labels is low. A requirement made on an HDD pressure-sensitive adhesive label is that the HDD adhesion label exhibiting adherence excellent enough not to be peeled easily when it is stuck, while the HDD pressure-sensitive adhesive label can be peeled easily when it has to be peeled. SUMMARY OF THE INVENTION [0013] A first object of the invention is to provide an HDD pressure-sensitive adhesive label in which the voltage level of peeling electrification generated when a release liner of the HDD pressure-sensitive adhesive label is released is reduced so that damage to the hard disk drive caused by the peeling electrification can be suppressed or prevented. [0014] A second object of the invention is to provide an HDD pressure-sensitive adhesive label in which damage to the pressure-sensitive adhesive label caused when a release liner of the HDD pressure-sensitive adhesive label is released can be suppressed or prevented so that the workability when the release liner is released can be further improved. [0015] A third object of the invention is to provide an HDD pressure-sensitive adhesive label which can be peeled easily when the HDD pressure-sensitive adhesive label stuck on a hard disk drive has to be peeled, and a method for peeling the pressure-sensitive adhesive label from the hard disk drive on which the pressure-sensitive adhesive label has been stuck. [0016] A fourth object of the invention is to provide an HDD pressure-sensitive adhesive label which can provide a possibility of solving the foregoing problem when a pressure-sensitive adhesive label stuck on a hard disk drive to keep airtightness and to indicate information is provided with a function of reducing noise generated when the hard disk drive is driven. [0017] That is, a first invention provides a pressure-sensitive adhesive label for a hard disk drive, which includes an information indication portion in one surface of a base, and a pressure-sensitive adhesive layer on the other surface of the base. The pressure-sensitive adhesive label for a hard disk drive is stuck on the outer surface of a housing of a hard disk drive so that noise generated when the hard disk drive is driven can be reduced. The pressure-sensitive adhesive label for a hard disk drive has a feature that the pressure-sensitive adhesive layer is coated with a release liner having an antistatic function. [0018] According to the first invention, the release liner having an antistatic function may have a structure in which an antistatic-treated layer has been formed on at least one surface of a base. It is preferable that the release liner having an antistatic function has one selected from a structure of an antistatic-treated layer and a base, and a structure of a base, an antistatic-treated layer and a base. Further, the antistatic-treated layer may be constituted by either one of metal foil and a metal-vapor-deposited film. [0019] A second invention provides a pressure-sensitive adhesive label for a hard disk drive, which includes an information indication portion in one surface of a base, and a pressure-sensitive adhesive layer on the other surface of the base. The pressure-sensitive adhesive label for a hard disk drive is stuck onto the outer surface of a housing of a hard disk drive so that noise generated when the hard disk drive is driven can be released. The pressure-sensitive adhesive label for a hard disk drive has a feature that the pressure-sensitive adhesive layer is coated with a release liner having at least one cut line. [0020] According to the second invention, it is preferable that split portions split by the at least one cut line have areas different in size in the release liner having the at least one cut line. The at least one cut line in the release liner may be formed into either one of a continuous line and a perforated line. Further, two or more cut lines may be provided in the release liner. [0021] Further, according to the second invention, it is preferable that the release liner having the at least one cut line is constituted by a polyolefin-based film. Furthermore, it is preferable that the release liner having the at least one cut line has a structure in which a release-treated layer made of a polyolefin-based film is formed on at least one surface of a substrate. Particularly according to the invention, it is preferable that the release liner having the at least one cut line contains a silicone-free release agent as its release agent. [0022] A third invention provides a pressure-sensitive adhesive label for a hard disk drive, which includes an information indication portion in one surface of a base, and a pressure-sensitive adhesive layer on the other surface of the base. The pressure-sensitive adhesive label is stuck on the outer surface of a housing of a hard disk drive so that noise generated when the hard disk drive is driven can be reduced. The pressure-sensitive adhesive label is a pressure-sensitive adhesive label for a hard disk drive having a feature that the pressure-sensitive adhesive label has a function of reducing adhesive force due to the pressure-sensitive adhesive layer by heating. Continue reading about Pressure-sensitive adhesive label for hard disk drive... Full patent description for Pressure-sensitive adhesive label for hard disk drive Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Pressure-sensitive adhesive label for hard disk drive patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. 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