JPH03210378A - Heat insulating adhesive tape and its manufacturing method - Google Patents

Abstract

PURPOSE:To obtain the title tape free from fraying at the edge by laminating and bonding two to four plies of glass cloth in tape form prepared by weaving glass fiber yarn into the glass cloth and slitting it. CONSTITUTION:Two to four strips of glass cloth 4 woven of glass fiber yarn 2, 3 are laminated and bonded to one another with an adhesive 5 to form a stock roll base 6. A self-adhesive 7 is applied to at least one side of the stock roll base 6, and a release sheet 8 is stuck to the surface of the self-adhesive 7, thus forming a stock roll 9. The stock roll 9 is slit into a plurality of heat insulating self-adhesive tapes 1, thus producing an objective heat insulating self-adhesive tape. This technique gives a heat insulating self-adhesive tape free from fraying at the edge and unsuitableness in use and appearance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application] The present invention relates to a heat insulating adhesive tape used for covering metal pipes through which high-temperature gases or liquids pass, packing for boilers, etc., and a method for manufacturing the same.

[Conventional technology] Heat resistance, insulation, and flexibility are required for the coating of metal pipes used in ships, automobiles, etc. that pass high-temperature gases or liquids, and the gaskets of boilers, so asbestos and glass fiber are used. A thermally insulating adhesive tape made of Among these, asbestos has the above-mentioned excellent properties, but has a negative effect on the human body, so recently, glass fiber heat-insulating adhesive tapes have been increasingly used.

Conventionally, this heat-insulating adhesive tape made of glass fiber is made of glass fiber yarn 22.23, as shown in FIG.
Adhesive 7 is applied to one side of a piece of glass cloth 24 woven by
and a release sheet 8 are provided to form a raw fabric 25, and this raw fabric 25 is slit as shown by the chain line in the figure to be processed into a plurality of heat insulating adhesive tapes. FIG. 4 shows a partially enlarged view of the heat-insulating adhesive tape.

[Problems to be Solved by the Invention] However, the glass fiber yarns 22 and 23 constituting the glass cloth 24 have a strong tendency to straighten, and furthermore, the fibers tend to slip on each other. When a cut at the side edge or a through hole (not shown) is provided, there is a problem in that the glass fiber yarn 2223 frays at the edge as shown in FIG. In particular, the number of fibers and fiber diameter are large,
Therefore, when thick glass fiber yarns are used, the above-mentioned tangles are severe and cause problems in terms of appearance and use.

An object of the present invention is to solve the above-mentioned problems and to provide a heat insulating adhesive tape in which the cuts of the side edges and the edges of the through holes do not fray, and a method for manufacturing the same.

[Means for Solving the Problems] In order to achieve the above object, the heat insulating adhesive tape of claim 1 has two to four tape-shaped glass cloths woven and slit from glass fiber yarns laminated together,
It consisted of a tape base in which the glass cloths were bonded together with an adhesive, an adhesive attached to at least one side 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 of the present invention 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 includes laminating two to four strip-shaped glass cloths woven from glass fiber yarn, and bonding the glass cloths together with an adhesive to form an original fabric base. a step of attaching an adhesive to at least one side of the raw fabric base and attaching a release sheet to the surface of the adhesive to form a raw fabric; and slitting the raw fabric into a plurality of sheets. The process consisted of the process of processing it into an insulating adhesive tape.

The method for manufacturing a heat insulating adhesive tape according to claim 4 includes laminating two to four strip-shaped glass cloths woven from glass fiber yarn, and bonding the glass cloths together with an adhesive to form a raw fabric base. a process of forming the original fabric base into a plurality of tape bases by slitting and noting the raw base, and adhering an adhesive to at least one side of the tape base and attaching a release sheet to the surface of the adhesive. The process consisted of the steps of: obtaining a heat insulating adhesive tape;

[Function] According to the heat insulating adhesive tape of claim 1, two to four pieces of glass cloth each having a thickness of 172 to 1/4 of that of a conventional tape are used, so that the glass fiber yarn constituting the glass cloth is different from that of a conventional tape. The number of fibers and fiber diameter can be smaller and thinner. Therefore, the force that tends to straighten the glass fiber yarn is weak.

Further, the two to four pieces of glass cloth are bonded together with an adhesive, and the glass fiber yarns constituting both glass cloths are fixed to the adhesive. Therefore, the glass fiber yarns do not spring straight or fall out at the cut edges of the slitted glass cloth, thereby preventing them from becoming frayed.

According to the heat insulating adhesive tape of claim 2, in addition to the effect of the heat insulating adhesive tape of claim 1, even when a through hole is formed in the tape base, the glass fiber yarn does not jump straight at the edge of the through hole. It will not fall out or fray.

According to the method for producing a heat insulating adhesive tape according to claim 3, the two to four pieces of glass cloth constituting the original fabric are firmly bonded to each other with an adhesive, so that during the slitting process, the cut edges of the original fabric are The fiberglass yarns will not spring straight or pull out and fray.

According to the method for manufacturing a heat insulating adhesive tape according to claim 4, similarly to the method for manufacturing a heat insulating adhesive tape according to claim 3, the glass fiber yarn does not spring straight or fall out at the cut end of the raw fabric base during the slitting process. It will not become frayed.

[First Example] Hereinafter, a first example in which the present invention is embodied using two glass cloths will be described with reference to FIGS. 1 and 2.

First, to explain the heat insulating adhesive tape 1 of this example, the first
As shown in the figure, two sheets of glass cloth 4 each made of plain weave glass fiber yarns 2 as warp yarns and glass fiber yarns 3 as weft yarns are stacked on top of each other. These glass cloths 4 are slit and formed into a tape shape with a constant width. Further, both glass cloths 4 have a thickness approximately 1/2 that of the desired heat-insulating adhesive tape, and therefore the glass fiber yarns 23 constituting these
Thin fibers with a small number of fibers and a small fiber diameter are used. The glass fiber yarns 2.3 are therefore more flexible and have less straightening force than conventional ones.

The two glass cloths 4 are bonded and integrated with an adhesive 5 applied between them.

Examples of the adhesive 5 include rubber-based, polyester-based, urethane-based, and other heat-resistant adhesives.

An adhesive 7 is attached to the lower surface of this integrally fixed glass cloth 4, and a release sheet 8 is further attached to the lower surface of the adhesive 7. As this adhesive 7, for example, an acrylic resin type adhesive is used.

Further, as the release sheet 8, kraft paper coated with a release agent or the like can be exemplified.

Next, the manufacturing process of this example will be explained in order with reference to FIG. 2.

■ First, two strips of glass cloth 4 woven from glass fiber yarns 2.3 and having a thickness approximately 1/2 of the thickness of the desired heat-insulating adhesive tape 1 are bonded together using an adhesive 5. to form an original fabric base 6. This original fabric base 6 has a width of about 1 m and a length of about 30 to 50 m, for example.

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

(2) Next, an adhesive 7 is attached to one side of the original fabric base 6, and a release sheet 8 is provided on the surface of the adhesive 7 to form an original fabric 9.

In this step, the release sheet 8 may be applied after applying the adhesive 7 to the original fabric base 6, or the release sheet 8 coated with the adhesive 7 may be applied to the original fabric base 6 first. .

(2) Finally, by slitting the original warp at the locations indicated by chain lines in FIG. 2, a plurality of heat-insulating adhesive tapes 1 are formed. Generally, the tape width is 10 to 100 mm.

This slitting is performed using 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 have a weak force to straighten. Since it is fixed with this adhesive, the warp glass fiber yarns 2 will not spring straight or come off and become frayed at the cut end of the side edge of the slitted glass cloth 4.

Next, another manufacturing method will be explained.

This manufacturing method is similar to the manufacturing method described above until forming the original fabric base 6, but after first slitting the original fabric base 6 and processing it into a plurality of tape bases 10, the tape base 10 is This manufacturing method differs from the above-described manufacturing method in that it includes the steps of adhering an adhesive 7 to one side of the adhesive 7 and adhering a release sheet 8 to the surface of the adhesive 7. The operation and effect are almost the same as the above manufacturing method.

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

The heat insulating adhesive tape 21 of this embodiment has through holes 1
Even at the edge of 1, the glass fiber yarns 2 and 3 do not spring straight or come off and do not fray. Further, by passing a connecting fitting such as a bolt through the through hole 11, it can be used as a heat insulating adhesive tape for a flange or the like.

Other effects are the same as in the first embodiment.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and may be modified and embodied as desired without departing from the spirit of the invention, for example, as described below.

(1) The number of glass cloths is not limited to two, but three or four sheets may be laminated and bonded. However, if three or more sheets of glass cloth are laminated and bonded, problems such as excessive manufacturing time and cost increase and the resulting heat-insulating adhesive tape becoming less flexible will occur. ~ Four pieces.

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

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

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

[Effects of the Invention] Since the heat insulating adhesive tape according to claim 1 is constructed as described above, the side edges of the heat insulating adhesive tape do not fray, causing no problems in use or appearance.

In addition to the above effects, the heat insulating adhesive tape of claim 2 also prevents the edges of the through holes of the heat insulating adhesive tape from fraying.

According to the method for producing a heat insulating adhesive tape according to claims 3 and 4, even when a raw fabric or a raw fabric base made of glass cloth or the like is slit, the glass fiber yarn at the cut end does not spring or fall straight. It never frays.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a heat insulating adhesive tape according to the 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 the second embodiment, and Fig. 4 is a perspective view of a conventional heat insulating adhesive tape, and FIG. 5 is a perspective view showing a conventional manufacturing process. 1. Small '1... Insulating adhesive tape, 2.3... Glass fiber yarn, 4... Glass cloth, 5... Adhesive, 7... Adhesive, 9... Original fabric, 11...Through hole. 6... Original fabric base, 8... Release sheet, 10... Tape base,

Claims (1)

[Claims] 1. Two to four tape-shaped glass cloths woven and slit with glass fiber yarns (2, 3) (
4) are laminated and the glass cloths (4) are bonded together with an adhesive (5); and an adhesive (7) attached to at least one side of the tape base (10). ) and a release sheet (8) attached to the surface of the adhesive (7). 2. The heat insulating adhesive tape according to claim 1, wherein the tape base (10) has a through hole (11) formed therein. 3. Two to four strip-shaped glass cloths (4) woven from glass fiber yarns (2, 3) are laminated, and the glass cloths (4) are bonded together using an adhesive (5). A step of forming an original fabric base (6), adhering an adhesive (7) to at least one side of the original fabric base (6), and applying a release sheet (8) to the surface of the adhesive (7).
a step of pasting the original fabric (9) to form the original fabric (9);
) to make multiple pieces of heat-insulating adhesive tape (1)
A method for manufacturing a heat insulating adhesive tape, which comprises the steps of: 4. Two to four strip-shaped glass cloths (4) woven from glass fiber yarns (2, 3) are laminated, and the glass cloths (4) are bonded together using an adhesive (5). A process of forming an original fabric base (6), a process of processing the original fabric base (6) into a plurality of tape bases (10) by slitting it, and applying an adhesive to at least one side of the tape base (10). (7) and attaching a release sheet (8) to the surface of the adhesive (7) to obtain a heat insulating adhesive tape (1).