JP3355090B2 - Heat sealable binding tape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a novel heat-sealing binding tape.

[0002]

2. Description of the Related Art Conventionally, binding of a box or the like is performed by a resin binding tape having heat sealing properties on both sides. The binding with the binding tape is quickly performed by the binding machine. The binding tape set in the binding machine travels along the arch-shaped rail of the binding machine, makes a round so as to wrap a box or the like to be bound, and stops when the tapes overlap. Thereafter, the tape is rewound to remove the slack, the material to be tied is tightened, and the portion where the tapes overlap is heat-sealed to complete the tying.

On the other hand, in the field of electronics, as a method of stacking and binding electronic component trays on which electronic components such as IC chips are placed, fixing with a vinyl tape, fixing with a rubber band, and the like are performed. Met. However, when using a binding machine to bind electronic component trays with binding tapes to improve efficiency, there is a problem that static electricity is generated, which was not a particular problem when binding boxes and the like. Became clear. The binding tape is charged with static electricity in a wound state, and furthermore, static electricity is generated in the binding tape by peeling the binding tape from the wound state and running on the rail at the time of binding. The IC chip is vulnerable to a high voltage due to static electricity, and the IC circuit is destroyed. Therefore,
It is conceivable that static electricity generated in the binding tape has an adverse effect on an IC chip or the like.

In order to prevent the generation of static electricity, a tray for electronic components on which electronic components such as IC chips are mounted has been bound using a polypropylene tape kneaded with an antistatic agent. I couldn't.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an antistatic property and running property, and to use a binding machine for binding.
Good ties without adversely affecting the IC circuit
It is an object of the present invention to provide a heat-sealing binding tape for an electronic component tray .

[0006]

Means for Solving the Problems In view of the above problems, the present inventors have repeatedly conducted an experiment for imparting an antistatic property to a heat-sealable binding tape. The present inventors have found that a product coated with an antistatic agent has excellent antistatic properties and also has excellent running properties on a rail of a binding machine, and has completed the present invention.

Namely, the present invention is Ri Do a multilayer film having at least one layer comprises the substrate layer biaxially oriented polypropylene film layer, to travel an arcuate rails provided on board
Used in a binding machine that winds the material to be bound
In the heat-sealing binding tape for an electronic component tray to be prepared , both surfaces of the base layer are formed of a heat-sealing film layer, and at least one surface of the heat-sealing film layer is coated with an antistatic agent. The heat-sealing binding tape according to any one of the preceding claims.

[0008] The base layer of the heat-sealable binding tape only needs to include at least one biaxially oriented polypropylene film layer, and may be composed of a single biaxially oriented polypropylene film or a plurality of biaxially oriented polypropylene films. Or a multilayer comprising a biaxially oriented polypropylene film layer and a polyethylene terephthalate film layer. The thickness of the base material layer is generally 35 to 110 μm from the viewpoint of the stiffness of the heat-sealing binding tape and the binding property.
It is.

As the polypropylene film, a film made of a propylene homopolymer, a propylene-α-olefin copolymer, or a mixture thereof can be used. Examples of the above α-olefin include ethylene, 1-butene, 1-pentene 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 4-methyl-1-pentene, and the like. Can be. The copolymer of propylene and α-olefin may be either a block copolymer or a random copolymer.

The resin for the heat-sealing film layer is not particularly limited as long as it exhibits heat-sealing properties. For example, a resin having a known composition such as a propylene-ethylene copolymer or a propylene-1-butene copolymer may be used. Can be used. The thickness of the heat sealable film layer is
Generally, it is 0.5 to 3.0 μm.

The heat-sealing film layers are formed on both sides of the base material layer.

A lubricant, an anti-blocking agent and the like can be added to each film layer of the heat-sealing binding tape of the present invention, if necessary. Further, other resins can be added as long as the performance is not reduced. Other resins include the above α-olefin homopolymer, the above α
-Olefin copolymers, petroleum resins and the like.

Examples of the antistatic agent coated on the surface of the heat-sealing film layer include cationic compounds such as dimethyldialkylammonium salt, dioxyethylenemethylalkylammonium salt and poly (oxyethylene) trialkylammonium salt, dimethylalkylbetaine and the like. Amphoteric systems such as alkylimidazolines and non-amplified compounds such as poly (oxyethylene) alkylamines, poly (oxyethylene) alkylamides, poly (oxyethylene) alkyl ethers, poly (oxyethylene) alkylphenyl ethers, glycerin fatty acid esters and sorbitan fatty acid esters; Known materials such as an ionic antistatic agent can be used without any limitation, but it is preferable to use a cationic antistatic agent because of its excellent antistatic effect. In particular, an antistatic agent composed of a poly (oxyethylene) trialkylammonium salt is preferable because the antistatic effect is stable and the coatability on the film surface is good. The antistatic agent only needs to be coated on at least one surface of the heat-sealing binding tape. However, it is preferable that the antistatic agent be coated on the inner surface when winding the heat-sealing binding tape in view of the running property of the tape.

The antistatic agent is usually prepared by dissolving the antistatic agent in a volatile solvent such as alcohol, and applying and coating the entire surface of the heat sealable film layer by gravure printing or the like. The coating amount of the antistatic agent is not particularly limited as long as it is an amount capable of exhibiting antistatic properties.
m ² is preferred.

The width of the heat-sealing binding tape of the present invention is generally 10 to 100 mm.

The heat-sealing binding tape of the present invention may be manufactured by any method, but is typically manufactured by the following method.

[0017] Two heat-sealable films each having a base layer containing at least one biaxially stretched polypropylene film layer and having a heat-seal layer on one side are laminated by dry lamination such that the heat-seal layer is on the outer surface. After that, an antistatic agent is coated on one side of the film by gravure printing. A heat-sealing film coated on one side with an antistatic agent is cut into a desired width, and wound up with the surface coated with the antistatic agent inside.

[0018]

The heat-sealing binding tape of the present invention is
It has the effect of not only having excellent antistatic properties and lowering the charged voltage, but also having the effect of having a low coefficient of friction and excellent running properties on the rails of the binding machine. Since trouble does not occur, trouble during binding is unlikely to occur. Therefore, trays for electronic components on which electronic components are placed,
It can be suitably used for bundling in fields that dislike static electricity and dust such as precision equipment. Further, the heat sealability is not inferior to a tape not coated with an antistatic agent.

[0019]

The present invention will be described in detail with reference to the following examples.

The measured values were obtained as follows.

1. Antistatic properties (1) Amount of charge due to friction After rubbing a tape of 30 mm x 40 cm and cotton back and forth 10 times, a charged voltage measuring device "STATILON-M" was used.
The charged voltage of the rubbed surfaces was measured using (manufactured by Shisido Shokai). The measurement was performed after the inner surface of the winding and the cotton were rubbed on the inner surface of the winding and the outer surface of the winding was rubbed with the cotton on the outer surface of the winding.

(2) Charging Amount by Bundling A tape having a width of 30 mm is wrapped with a bundling machine “Spot band bundling machine” (manufactured by Masahiro Kiko Co., Ltd.), and is 150 mm long × 100 mm wide.
× A paper box having a height of 50 mm was bound, and immediately after the binding, the heat-sealed portion was peeled off, and the charged voltage on both sides of the tape was measured using a charged voltage measuring device “STATILON-M” (manufactured by Shisido Shokai). The charged voltage of the tape before binding was measured on the outer surface of the wound tape while the tape was wound.

2. Slipperiness (1) Friction coefficient The coefficient of friction between films was measured using a friction coefficient measuring device “TR” (manufactured by Toyo Seiki Co., Ltd.).

(2) Runnability A tape having a width of 30 mm is applied to a binding machine “Spot band binding machine” (manufactured by Masahiro Kiko Co., Ltd.), and is 150 mm long × 100 mm wide.
× A paper box having a height of 50 mm was continuously bound and the time required for binding 1000 times was measured. In addition, when the tape traveled on the rail of the binding machine, it was observed whether or not a waving phenomenon occurred in the tape.

3. Sealing property A 30mm wide tape is heat-sealed with NO.213 YSS Typ
e "(manufactured by Yasuda Seiki Co., Ltd.) and heat-sealed at various temperatures, and the shear peel strength was measured using a tensile tester" AGS-500NB "(manufactured by Shimadzu Corporation).

Heat sealing conditions are as follows: sealing pressure 1 kg /
cm ² , sealing time 1 second, lower heater temperature 30 ° C.

Example 1 A heat-sealing biaxially oriented polypropylene film "HA20" (manufactured by Sun Tox Co., Ltd.) having a thickness of 40 .mu.m was dry-laminated so that the heat-sealing layer was on the outside, and then an antistatic agent " Anstex C-200X "
A 2% isopropyl alcohol solution (manufactured by Toho Chemical Industry Co., Ltd.) was applied to one entire surface of the film by gravure printing. After drying, it was cut to a width of 30 mm and wound up in a roll shape such that the surface to which the antistatic agent was applied was on the inside, to produce a heat-sealing binding tape.

The antistatic properties, slip properties and sealing properties of the tape were measured and are shown in Tables 1, 2 and 3, respectively.

Comparative Example 1 A heat-sealing binding tape was produced in the same manner as in Example except that the antistatic agent was not applied.

The antistatic properties, slip properties and sealing properties of the tape were measured and are shown in Tables 1, 2 and 3, respectively.

Comparative Example 2 0.08% by weight of a spherical melamine formaldehyde condensate having a particle size of 1.2 μm and 0.03% by weight of erucamide were added to polypropylene having a melt index of 2.0 g / 10 minutes and an isotacticity of 96%. And 0.04% by weight of calcium stearate, and 0.4% by weight of each of a glycerin fatty acid ester and an alkyldiethanolamine fatty acid ester as antistatic agents, and used as a resin for the base material layer. On the other hand, a propylene-ethylene random copolymer having an ethylene content of 3% and a spherical polymethyl methacrylate-based resin having a particle size of 1.8 μm in an amount of 0.06% by weight,
What added 0.2% by weight of erucamide and 0.04% by weight of calcium stearate was used as a resin for the surface layer. These resins are melt extruded at 280 ° C.
After forming a sheet of μm and cooling, MD at 158 ° C
Stretched 10 times to TD at 172 ° C. and 38.5 μm
To obtain a 40 μm two-layer laminated film in which a 1.5 μm surface layer was laminated on one side of the base material layer.

The resulting films were dry-laminated so that the surface layer was on the outside, then cut so as to have a width of 30 mm, wound up in a roll, and kneaded with an antistatic agent. Manufactured.

The antistatic properties of the tape were measured and are shown in Table 1.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

──────────────────────────────────────────────────続 き Continued on the front page (73) Patent holder 596104050 San Tox Co., Ltd. 1-4-5 Nishi-Shimbashi, Minato-ku, Tokyo No. Fukusuke Amano Co., Ltd. (72) Inventor Yoshitada Kawachi 32-15 Izumida, Okayama City, Okayama Prefecture In-house Kawachi Gravure Printing Co., Ltd. (72) Inventor Norio Masaki 1-1-1 Nishi-Shimbashi, Minato-ku, Tokyo Inside San Tox Corporation (72) Inventor Masaru Furukawa 1-1-1, Mikage-cho, Tokuyama City, Yamaguchi Prefecture References JP-A-47-43065 (JP, A) JP-A-7-41036 (JP, A) JP-B-56-6860 (JP, B1) JP-B-62-35895 (JP, B1) (58) The field (Int.Cl. ^7, DB name) B32B 1/00 - 35/00 B65D 63/00 - 63/18

Claims (1)

(57) [Claims] 1. A multilayer film having a substrate layer including at least one biaxially oriented polypropylene film layer.
By traveling on the arched rail provided in the aircraft
Electronic unit used in a binding machine that winds the material to be bound
In a heat-sealing binding tape for a product tray , both sides of a base material layer are formed of a heat-sealing film layer, and at least one surface of the heat-sealing film layer is coated with an antistatic agent. The heat-sealing binding tape described above.