JPH1095072A - Double side silicone coated tape and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double side silicone coated tape and its manufacture wherein non slip properties and sealing properties can be secured more easily by being compared with conventional one, and when peeled off, it can be easily peeled off without leaving a residue of a tacky adhesion layer. SOLUTION: Silicone layers 2, 2' are formed on both faces of a base material film 1, and a protective film 3 is provided respectively onto the silicone layers 2, 2'. Further, a method for manufacture of a two-side silicone coated tape contains a process wherein silicone resin or rubber composition is applied to one side of the base material film 1 and crosslinked, a process wherein protective films 3, 3' are provided to the formed silicone layers 2, 2', a process wherein silicone resin or rubber composition is applied to the other face of the base material film 1 and crosslinked, and a process wherein the protective film is provided to the formed silicone layers 2, 2'.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-sided silicone coated tape and a method for producing the same, and more particularly, to a double-sided silicone coated tape in which a silicone resin (rubber) is coated on both sides of a base film and a method for producing the same.

[0002]

2. Description of the Related Art Silicone-based silicone coating tapes using a crosslinked layer of silicone resin or a silicone rubber-like layer are required to be easily fixed and easily peeled. It is often used as a non-slip tape or sealing tape for preventing slippage of articles and dishes in a dining room.

[0003] Such a silicone-based silicone coating tape is conventionally formed by directly laminating a silicone resin composition or a rubber-like substance on a base film by coating or the like and crosslinking to form a silicone layer, and an adhesive layer on the opposite surface. It has a structure provided.

[0004] The silicone coating tape generally has an adhesive layer as described above. However, since the silicone coating tape is attached to an article which is not slipped or sealed by the adhesive layer, it has a non-slip property. There is a disadvantage that it takes time to secure the sealing property. Further, when it is necessary to peel off the silicone coating tape, there is a problem that much difficulty is caused and stains are generated due to the remaining adhesive layer.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and as compared with the prior art, non-slip property and sealing property can be easily ensured, and when peeled, the adhesive layer can be easily peeled without residual residue. An object of the present invention is to provide a double-sided silicone coated tape and a method for producing the same.

[0006]

Means for Solving the Problems In order to solve the above problems, the double-sided silicone coating tape according to the present invention has a silicone film formed on both sides of a base film and a protective film provided on the silicone layer. It is characterized by the following.

Further, in the method for producing a double-sided silicone coated tape according to the present invention, a step of applying a silicone resin or a rubber composition to one surface of a base film and crosslinking, and providing a protective film on the formed silicone layer. And a step of applying a silicone resin or rubber composition to the other surface of the base film and crosslinking the same, and a step of providing a protective film on the formed silicone layer.

According to the present invention, since a silicone layer having a non-slip property and a sealing property is formed on both sides of the base film, no adhesive layer is required when the silicone film is attached to a non-slip product. For this reason, there is an advantage that it is easy to perform non-slip and seal, and it is possible to easily and without any residue of the adhesive layer when removing for some reason.

[0009]

DETAILED DESCRIPTION OF THE INVENTION A double-sided silicone coating tape according to the present invention is provided with a non-slip silicone layer 2, 2 'on both sides of a base film 1 as shown in FIG. The protective films 3 and 3 'are respectively laminated on the'.

As the substrate film 1 as described above, those conventionally used as a substrate such as a non-slip, sealing tape or the like of this type can be effectively used. For example, a film or sheet such as polyester, polyimide, Kapton, polyethylene fluoride, polyvinyl fluoride, or woven fabric can be effectively used.

As the silicone layer 2 provided on such a base film 1, a silicone polymer conventionally used as a silicone coating tape of this type can be effectively used. For example, a peroxide-crosslinkable silicone polymer and an addition-polymerized silicone polymer can be used. Examples of the peroxide used in the peroxide cross-linking type include monochlorobenzoyl peroxide and dichlorobenzoyl peroxide, and the addition-polymerization type silicone resin includes those polymerized by a platinum catalyst.

The thickness of the silicone layer is 10 to 200 μm.
m. If the thickness is less than 10 μm, good non-slip properties and sealing properties may not be exhibited.
If it exceeds m, it becomes difficult to produce a double-sided silicone coated tape.

The protective films 3 and 3 'provided on the silicone layers 2 and 2' adhere to each other when the silicone layers 2 and 2 'are wound, as will be apparent from a manufacturing method described later. The protective films 3 and 3 ′ are provided so as to prevent the silicone layers 2 and 2 ′ from being provided on both surfaces of the base film 1.

The protective films 3 and 3 'are provided with the silicone layer 2 on one side, the protective film 3 is laminated, and then wound around a drum, and then the other side is coated with the silicone layer 2'.
Is required to have slightly better elongation than the base film 1. If the elongation is slightly poorer than that of the base film 1, the silicone film 2 may be peeled off. Such a difference in elongation Δ
Is preferably 1 to 5%. When the difference Δ in elongation is less than 1%, the protective film 3 may be wrinkled when the difference Δ in elongation exceeds 5%. May not be provided smoothly.

When the (second) silicone layer 2 'is provided on the back surface of the protective film 3 provided first as described above, the silicone layer 2' is vulcanized. Since the temperature at this time is 120 to 150 ° C., it should not soften at the above temperature. Therefore, a film having a softening temperature higher than the crosslinking temperature is used. As such a protective film, for example, a non-stretched polypropylene film, a PET film, and the like are optimal from the economical viewpoint. Further, as the protective film 3 covering the silicone layer 2 ′, since there is no restriction as described above, an unstretched polypropylene film, PE
In addition to a T film, biaxially oriented polypropylene, polyester, or the like can be used.

The thickness of such a protective film 3 is preferably 12 to 38 μm. When it is less than 12 μm, wrinkles are easily formed, and when it exceeds 38 μm, handling becomes difficult.

In using the double-sided silicone coating tape according to the present invention, it is only necessary to peel off the above-mentioned protective films 3, 3 'to expose the silicone layers 2, 2' and place them between the articles to be non-slip. . That is, since the above-mentioned silicone layers 2 and 2 ′ have non-slip properties, it is possible to prevent slippage without using an adhesive layer.

The present invention also provides a method for producing a double-sided silicone coated tape as described above.

As shown in FIG. 2, first, the base film 1 wound on the starting roll R1 is transported by the transport roll R2. Then, the silicone composition 5 is applied to one surface of the base film 1 by the application roll R3 and the knife 4 or the like. Thereafter, the coating material enters the heating chamber 6 and is crosslinked to form a base film provided with a first silicone layer on one surface.

On the other hand, the protective film 3 is wound around a protective film roll R4, is transported by a transport roll R5, and is provided with a base film provided on one surface with the first silicone layer unloaded from the heating chamber 6. Pressure bonding is performed by pressing rollers R6 and R7. Thereafter, the semi-finished product sheet in which the protective film is laminated on the silicone layer is wound around a sheet roll R8.

The semi-finished product sheet wound as described above is mounted on the starting roll R1 again, and the silicone composition 5 is applied to the surface of the base material film on which the silicone layer is not provided in the same manner as described above, followed by crosslinking. To form a second silicone layer. Thereafter, a protective film is pressed on the second silicone layer to form a double-sided silicone coated tape.

By providing the protective film on the first silicone layer as described above, when the second silicone layer is provided, the non-slip, sealable silicone layer adheres and smoothes the plurality of rolls. In this case, it is possible to prevent a situation in which proper driving is hindered, and it is possible to provide the silicone layer on both sides of the base film.

The crosslinking temperature of the heating chamber 6 is 1
The temperature is preferably from 20 to 150 ° C. If the temperature is lower than 120 ° C., the silicone layer may not be sufficiently crosslinked.
If the temperature exceeds 50 ° C., there is a case where the base film or the protective film is deteriorated.

Further, the crosslinking time is preferably 2 minutes to 10 minutes. If the time is less than 2 minutes, the crosslinking may not be sufficient. On the other hand, if the time exceeds 10 minutes, the base film or the protective film may deteriorate.

The pressure at which the protective film and the silicone layer are pressure-bonded is preferably 1 to 4 kgf / cm. If it is less than 1 kgf / cm, it may be peeled off from the silicone layer when it is wound on a drum, while if it is more than 4 kgf / cm, it may be difficult to peel off the protective film when using the sheet. Become like

[0026]

EXAMPLE Using the apparatus shown in FIG. 2 described above, a silicone rubber composition (KE-1, KE-1) was applied to a polyester film (PET).
935; Trade name: Shin-Etsu Chemical Co., Ltd.)
And polymerized at 133 ° C. for 4 minutes. A polyester film (PET) having a thickness of 50 μm was laminated on the silicone layer, and pressed with a pressure of 4 kgf / cm.

The semi-finished product sheet thus prepared was mounted again on the starting roll R1 of the apparatus shown in FIG. 2, a second silicone layer was formed under the same conditions, and a protective film was laminated.

The produced double-sided silicone coating tape was adhered to a load of 200 g of 6 × 6 cm, and the force (dynamic friction resistance) when pulling at a rate of 150 mm / min on a canvas, a glass plate or a stainless steel plate was measured. did. For comparison, kinetic friction resistance values were measured under the same conditions for a non-slip layer of butyl rubber (Comparative Example 1) and a non-slip layer of water-added NBR (Comparative Example 2). The results are as shown in Table 1.

Table 1 0.5 mm canvas Glass plate Stainless steel plate Example 2.25 12.25 8.5 (Static friction resistance value) Comparative example 1 1.15 4.2 3.7 Comparative example 2 1.8 2.3 1 .9

In the examples, the result of measurement performed on the glass plate is a static friction resistance value. When the load is pulled on the glass plate, the movement becomes intermittent as moving-stop-moving-stop, and the dynamic friction resistance value is obtained. Could not be measured. Therefore, the static friction resistance value when the load starts to move was shown. In this case, the fact that the dynamic friction resistance cannot be measured indicates that the non-slip property is good.

Further, the silicone coating tape thus prepared was cut into a width of 3 cm, the protective film was peeled off, and the silicone layers were overlapped with each other so as to overlap with each other over a width of 3 cm so that the silicone layers faced each other and were adhered to each other. The force (shear peeling strength) when this was pulled at 200 ° C./min. At 300 ° C. was 3.0 kg. The required shear peel strength is considered to be different depending on the intended use, but if it is 3.0 kg, it can be used for various purposes.

[0032]

As described above, according to the double-sided silicone coating tape of the present invention, since silicone layers are formed on both sides of the base film, non-slip treatment, sealing treatment, etc. are performed without the need for an adhesive layer. It is also possible to easily remove it when it is peeled off for some reason. Further, since the protective film is provided, handling such as transportation is easy, and it is possible to prevent a situation in which dust or the like adheres to the silicone layer to impair the non-slip property.

Further, according to the method for producing a double-sided silicone coating tape of the present invention, a double-sided silicone coating tape having a silicone layer on both sides as described above can be easily produced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a configuration example of a double-sided silicone coating tape according to the present invention.

FIG. 2 is an explanatory view illustrating a non-slip manufacturing method according to the present invention.

[Explanation of symbols]

 1 base film 2 silicone layer 3 protective film

Claims (3)

[Claims] 1. A double-sided silicone coating tape comprising a silicone film formed on both sides of a base film and a protective film provided on the silicone layer. 2. The thickness of the silicone layer is 10 to 200 μm.
The double-sided silicone coated tape according to claim 1, wherein m is m. 3. A step of applying a silicone resin or a rubber composition to one surface of a base film and crosslinking, a step of providing a protective film on the formed silicone layer, and a step of applying silicone to the other surface of the base film. A method for producing a double-sided silicone coating tape, comprising a step of applying a resin or rubber composition and crosslinking, and a step of providing a protective film on the formed silicone layer.