JPH0689308B2 - Heat-insulating adhesive tape and manufacturing method thereof - Google Patents

Description

The present invention relates to a heat-insulating adhesive tape used for coating a metal tube through which a high-temperature gas or liquid is passed, packing for a boiler, and the like, and a method for producing the same.

[Prior Art] Asbestos and glass fiber are required because heat resistance, heat insulation, and flexibility are required for the coating of metal pipes and the packing of boilers that pass high-temperature gas or liquid used in ships and automobiles. The heat-insulating adhesive tape formed by is used. Of these, asbestos is excellent in the above-mentioned performance, but adversely affects the human body. Therefore, recently, heat-insulating pressure-sensitive adhesive tapes made of glass fiber have been widely used.

Conventionally, as shown in FIG. 5, this glass fiber heat-insulating adhesive tape has a pressure sensitive adhesive 7 and a release sheet 8 provided on one side of a piece of glass cloth 24 woven with glass fiber yarns 22 and 23. It was manufactured by a method of forming a raw fabric 25, slitting the raw fabric 25 as shown by a chain line in the figure, and processing it into a plurality of heat insulating adhesive tapes.
A partially enlarged view of the heat insulating adhesive tape is shown in FIG.

[Problems to be Solved by the Invention] However, since the glass fiber yarns 22 and 23 forming the glass cloth 24 have a strong force to be straightened and the fibers are slippery, the slitted glass cloth 24 In the case where a cut edge of the side edge portion or a through hole (not shown) is provided, there is a problem that the glass fiber yarns 22 and 23 are frayed at the edge as shown in FIG. In particular, when the glass fiber yarn having a large number of fibers and a large fiber diameter is used, the fraying causes serious problems in appearance and use.

An object of the present invention is to solve the above problems and to provide a heat-insulating adhesive tape in which a cut edge of a side edge portion and an edge of a through hole are not frayed and a manufacturing method thereof.

[Means for Solving the Problems] In order to achieve the above object, the heat-insulating adhesive tape according to claim 1 is formed by laminating two to four tape-shaped glass cloths woven by glass fiber yarn and slitted,
The glass base was composed of a tape base in which the glass cloths were adhered to each other with an adhesive, an adhesive attached to at least one surface of the tape base, and a release sheet attached to the surface of the adhesive.

A heat insulating adhesive tape according to a second aspect is the heat insulating adhesive tape according to the first aspect, wherein the tape base has a through hole formed therein.

The method for producing a heat-insulating adhesive tape according to claim 3, wherein two to four belt-shaped glass cloths woven with a glass fiber yarn are laminated, and the glass cloths are adhered to each other with an adhesive to form a raw fabric base. A step of forming, a step of adhering an adhesive to at least one surface of the original fabric base and a release sheet attached to the surface of the adhesive to form an original fabric, and slitting the original fabric to form a plurality of sheets. And a step of processing into a heat-insulating adhesive tape.

The method for producing a heat-insulating adhesive tape according to claim 4, wherein two to four strip-shaped glass cloths woven with glass fiber yarns are laminated, and the glass cloths are adhered to each other with an adhesive to form a raw fabric base. A step of forming, a step of slitting the original fabric base into a plurality of tape bases, an adhesive is attached to at least one surface of the tape base, and a release sheet is attached to the surface of the adhesive. And a step of obtaining a heat-insulating adhesive tape.

[Operation] According to the heat-insulating adhesive tape of claim 1, since 2 to 4 glass cloths having a thickness of 1/2 to 1/4 are used as compared with the conventional tape, the glass fiber yarn constituting the glass cloth is used. The number of fibers and the diameter of the fiber are smaller than those of the conventional products. Therefore, the force of the glass fiber yarn to straighten is weak.

Further, the above two to four glass cloths are bonded together with an adhesive, and the glass fiber yarns forming both glass cloths are fixed to the adhesive. Therefore, the glass fiber yarn does not fray or fray straight and fray at the cut edge of the side edge of the slit glass cloth.

According to the heat-insulating adhesive tape of claim 2, in addition to the function of the heat-insulating adhesive tape of claim 1, even when a through hole is formed in the tape base, the glass fiber yarn rebounds straight at the edge of the through hole. It does not come loose and fray.

According to the method for producing a heat-insulating adhesive tape of claim 3, the two to four glass cloths constituting the original fabric are firmly bonded to each other with an adhesive, so that the slit of the original fabric is cut during the slitting step. In, the fiberglass yarn does not fray or fray straight and fray.

According to the method for producing a heat-insulating adhesive tape of claim 4, similarly to the method for producing a heat-insulating adhesive tape according to claim 3, the glass fiber yarn is splashed straight out at the cut end of the original fabric base during the slitting step. There is no fraying.

First Embodiment Hereinafter, a first embodiment in which the present invention is embodied by using two glass cloths will be described with reference to FIGS. 1 and 2.

First, the heat insulating adhesive tape 1 of the present embodiment will be described.
As shown in the figure, two glass cloths 4 formed by weaving a glass fiber yarn 2 as a warp yarn and a glass fiber yarn 3 as a weft yarn in a plain weave are stacked. These glass cloths 4 are formed in a slit-like tape shape having a constant width. Further, both glass cloths 4 have a thickness of about 1/2 that of the desired heat insulating adhesive tape,
Therefore, as the glass fiber yarns 2 and 3 constituting these, thin fibers having a small number of fibers or a small fiber diameter are used. Therefore, the glass fiber yarns 2 and 3 are more flexible than conventional ones and have a weaker force to straighten.

The two glass cloths 4 are bonded and integrated by an adhesive 5 applied between them. Examples of the adhesive 5 include rubber-based, polyester-based, urethane-based, and various other heat-resistant adhesives.

An adhesive 7 is attached to the lower surface of the integrated glass cloth 4, and a release sheet 8 is attached to the lower surface of the adhesive 7. As the adhesive 7, for example, an acrylic resin type is used. Further, as the release sheet 8, kraft paper coated with a release agent can be exemplified.

Next, the manufacturing process of this embodiment will be described in order with reference to FIG.

First, woven with fiberglass yarn 2,3,
Two strip-shaped glass cloths 4 having a thickness of about 1/2 of the desired thickness of the heat-insulating adhesive tape 1 are provided with an adhesive 5 between them.
The original fabric base 6 is formed by bonding with. The original fabric base 6 has a width of 1 m and a length of 30 to 50 m, for example.

By this step, each of the glass fiber yarns 2 and 3 constituting both glass cloths 4 is fixed to the adhesive.

Next, the pressure sensitive adhesive 7 is attached to one surface of the raw fabric base 6, and the release sheet 8 is provided on the surface of the pressure sensitive adhesive 7 to form the raw fabric 9.

In this step, the release sheet 8 may be attached after the adhesive 7 is applied to the original fabric base 6, or the release sheet 8 to which the adhesive 7 is applied may be attached to the original fabric base 6 in advance. .

Finally, the raw fabric 9 is slit at the location shown by the chain line in FIG. 2 to form a plurality of heat insulating adhesive tapes 1. Generally, the tape width is 10-100 mm. This slitting is performed by a known slitting device.

According to the above manufacturing method, the glass fiber yarns 2 and 3 constituting the two glass cloths 4 are thin and flexible, and the force for straightening is weak, and the glass fiber yarns 2 and 3 are individually Since it is fixed to the adhesive, the glass fiber yarn 2 of the warp does not fray or fray straight and fray at the cut portion of the side edge of the slit glass cloth 4.

Next, another manufacturing method will be described.

This manufacturing method is the same as the above manufacturing method until the original fabric base 6 is formed. However, after the original fabric base 6 is slit and processed into a plurality of tape bases 10, the tape base 10 is formed. This is different from the above-mentioned manufacturing method in that the step of adhering the pressure sensitive adhesive 7 on one surface of the above and then sticking the release sheet 8 on the surface of the pressure sensitive adhesive 7 is taken. The action and effect are almost the same as those of the above manufacturing method.

Second Embodiment The second embodiment shown in FIG. 3 differs from the first embodiment only in that the tape base 10 is provided with a through hole 11 by, for example, punching.

In the heat-insulating adhesive tape 21 of this embodiment, the glass fiber yarns 2 and 3 do not fray or fray in a straight line even at the edge of the provided through-hole 11 and fray. Further, by passing a connecting metal fitting such as a bolt through the through hole 11, it can be used as a heat insulating adhesive tape such as a flange. Other functions and effects are similar to those of the first embodiment.

The present invention is not limited to the configurations of the above-described embodiments, but may be embodied by being arbitrarily modified within the scope of the gist of the invention as follows, for example.

(1) The number of glass cloths is not limited to two, and three or four may be laminated and bonded. However, if five or more glass cloths are laminated and adhered to each other, problems such as excessive manufacturing labor and cost increase and poor flexibility of the resulting heat-insulating adhesive tape occur. ~ 4 pieces.

(2) The thickness of each glass cloth does not necessarily have to be the same.

(3) The texture of the glass cloth does not matter.

(4) It may be a type in which an adhesive is attached to both surfaces of the tape base or the raw fabric base.

EFFECTS OF THE INVENTION Since the heat-insulating adhesive tape according to claim 1 is configured as described above, the side edge portion of the heat-insulating adhesive tape does not fray and does not cause problems in use and appearance.

In addition to the above effects, the heat-insulating adhesive tape of claim 2 does not fray the edge portion of the through hole of the heat-insulating adhesive tape.

According to the method for manufacturing the heat-insulating adhesive tape of claims 3 and 4, even if the original fabric or the original fabric base made of glass cloth or the like is slit, the glass fiber yarn at the cut end thereof is directly sprung or pulled out. There is no fraying.

[Brief description of drawings]

FIG. 1 is a perspective view of a heat insulating adhesive tape of a first embodiment of the present invention, FIG. 2 is a perspective view showing the same manufacturing process, FIG. 3 is a perspective view of a heat insulating adhesive tape of a second embodiment, and FIG. Is a perspective view of a conventional heat insulating adhesive tape, and FIG. 5 is a perspective view showing a conventional manufacturing process. 1,21 …… Insulation adhesive tape, 2,3 …… Glass fiber yarn, 4 …… Glass cloth, 5 …… Adhesive, 6 …… Fabric base, 7 …… Adhesive, 8 …… Peeling sheet, 9 …… Fabric, 10 …… Tape base, 11 …… Through hole.

Claims (4)

[Claims] 1. Two to four tape-shaped glass cloths (4) woven and slitted with glass fiber yarns (2, 3) are laminated, and an adhesive ( 5) Tape base (1)
0), an adhesive (7) attached to at least one surface of the tape base (10), and a release sheet (8) attached to the surface of the adhesive (7). 2. The through hole (11) in the tape base (10).
The heat insulating adhesive tape according to claim 1, wherein the heat insulating adhesive tape is formed. 3. Two to four band-shaped glass cloths (4) woven with glass fiber yarns (2, 3) are laminated, and an adhesive (5) is provided between the glass cloths (4).
To form the raw fabric base (6) by adhering the adhesive fabric to the raw fabric base (6), and attaching the adhesive (7) to at least one surface of the original fabric base (6) and a release sheet (8) on the surface of the adhesive (7). A method for producing a heat-insulating adhesive tape, comprising the steps of sticking a raw material (9) to each other and forming a raw material (9) by slitting the raw material (9) into a plurality of heat-insulating adhesive tapes (1). 4. Two to four strip-shaped glass cloths (4) woven with glass fiber yarns (2, 3) are laminated, and an adhesive (5) is provided between the glass cloths (4).
Forming a raw fabric base (6) by adhering with each other, slitting the raw fabric base (6) into a plurality of tape bases (10), and the tape base (10)
Of a heat-insulating adhesive tape (1) by adhering the pressure-sensitive adhesive (7) to at least one surface of the product and attaching a release sheet (8) to the surface of the pressure-sensitive adhesive (7) to obtain the heat-insulating adhesive tape (1). .