JP2003061222A - Cylindrical covering material and covering material kit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical covering material having excellent damage resistance, impact resistance, weather resistance, tearing resistance and air- tightness which is loaded to a long object to cover the surface thereof. SOLUTION: This covering material is formed of a polymer material which has viscous elasticity and can also be compressed. Moreover, a plurality of ridge type projections are allocated in the longitudinal direction at the external circumferential surface of the covering material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular covering material, and more specifically, a relatively thin and long article such as a cable, a rod or a pipe (hereinafter referred to as "long article" collectively). (Referred to as (1)) to cover the tubular covering material having excellent scratch resistance and the like. The present invention also provides
The present invention relates to a covering material kit capable of accurately and quickly attaching such a cylindrical covering material to a long article by a simple method.

[0002]

2. Description of the Related Art Conventionally, it has been proposed to use various kinds of tubular covering materials for protection of electric wires and cables, insulation treatment, protection of metal pipes, rust prevention and impact relaxation treatment. The tubular covering material may be a tube having a simple single layer structure or a tube having a multilayer structure having two or more layers. Synthetic rubber and various plastic materials are used as the tube material.

However, in the case of the conventional tubular covering material, although it is formed of a material having excellent mechanical strength and heat resistance in consideration of its intended use, external force or energy is directly applied. In addition, since it acts on the main body of the covering material, the performance derived from the material may be lowered. For example, if excessive impact is applied to the covering material, the covering material is damaged, and airtightness, waterproofness, etc. are deteriorated. Also, if left outdoors, it will be exposed to ultraviolet rays for a long time, so the material will eventually deteriorate,
In addition to the decrease in insulation, there is a risk of cracking and oxidation.

Further, the tubular covering material is usually required to be attached to a long article with a large tightening force in order to secure excellent airtightness, but the tightening force of the covering material is a material. Since the adjustment can be made only by the elastic modulus (modulus) of itself, the thickness of the coating material, and the elongation rate, there is a limit to the adjustment range. In fact, adjusting the modulus of a material makes it difficult to select the starting material used to prepare that material, and also increases the thickness of the coating, which limits shape, reduces workability, and reduces elongation. Problems such as reduction in cost and increase in cost due to increase in the number of materials cannot be avoided.

As described above, various tubular coating materials are already known. However, the above-mentioned problems have been set as solutions, and none have been solved. For example, JP-A-59-224317 discloses a foamed sheet of a thermoplastic resin which is particularly useful for forming a heat-shrinkable sleeve for protecting a glass bottle. However, this foamed sheet is inferior in mass productivity and workability in that it must be wound in a cylindrical shape and joined at both ends to form a cylindrical sleeve, and a long product There is also an inconvenience that a dedicated sleeve has to be produced for each type. Furthermore, since the inner surface of the foam sheet, that is, the surface that contacts the bottle, has a concave pattern, it is effective in preventing the scattering of fragments when the bottle is damaged, but it absorbs the impact on the bottle and damages the bottle. It cannot prevent itself.

[0006] Japanese Utility Model Laid-Open No. 4-68417 discloses a harness protection tube, that is, a harness which is covered and protected by a heat-shrinkable resin material or rubber. Disclosed is a tube having the point-like projections on the outer surface thereof. However, this protection tube cannot prevent the tube from tearing, and the scattered projections alone cannot provide satisfactory impact resistance.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art and to mount it on a long article and coat the surface thereof with a scratch-resistant material. It is to provide a tubular coating material having excellent properties, impact resistance, weather resistance, tear resistance, airtightness, and the like.

The object of the present invention is also to obtain a high tightening force when mounted on a long article, and
It is an object of the present invention to provide a tubular covering material capable of optimizing the tightening force depending on the type of long article.

Another object of the present invention is to provide a dressing kit which enables simple and quick work when the tubular dressing of the present invention is attached to a long article.

[0010]

According to one aspect of the present invention, there is provided a tubular covering material for mounting on a long article and covering the surface thereof, which is made of a polymer material having viscoelasticity. The tubular covering material is characterized in that a plurality of ridge-shaped projections are arranged in the longitudinal direction on the outer peripheral surface of the covering material.

Further, in another aspect of the present invention, there is provided a cylindrical covering material for mounting on a long article and covering the surface thereof, and a cylindrical support having an inner diameter through which the article can penetrate. A covering material kit including a body, wherein the covering material is made of a polymer material having viscoelasticity, and has an outer peripheral surface having a plurality of ridge-shaped projections arranged in a longitudinal direction, And supported by the support in such a manner as to cover the outer circumference of the support, and the cylindrical support,
The dressing kit is characterized in that the dressing is designed to be pulled out from the dressing when the dressing is attached to the long article and the article is covered with the dressing.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The tubular coating material according to the present invention is for attaching to a long article, that is, an article extending in the longitudinal direction (also referred to as a long article) to coat and protect the surface thereof. Is. Therefore, the long article referred to here may be any one as long as the covering material of the present invention can exert its excellent action and effect. Examples of long articles suitable for carrying out the present invention include, but are not limited to, those listed below, but include cables, cords, wires and the like or bundles thereof, rods, pipes and the like. Specific examples of particularly suitable long articles include electric wire and cable connecting portions.

The cold-shrinkable tubular covering material is usually supported by a cylindrical support (also referred to as a core) before it is attached to a long article, as described in detail below. . That is, the cold-shrinkable tubular covering material is supported by the support so as to cover the outer circumference of the cylindrical support, and the support is pulled out after inserting the long article into the hollow portion of the support. Thus, the outer circumference of the article is coated as a result of cold shrinkage. Therefore, the tubular dressing of the present invention can also be combined with a cylindrical support to form a dressing kit.

The tubular covering material can be formed of various materials depending on the purpose of use, but it is usually formed of a polymeric material having appropriate viscoelasticity and preferably contractible. In particular, this polymeric material is preferably a rubber material or a thermoplastic elastomer that can shrink at room temperature when the covering material is attached to a long article, or a plastic material that can otherwise heat shrink. These tubular covering materials can be provided as cold shrink tubes or heat shrink tubes. Of course, the tubular dressing of the present invention can also be provided as a plug-in tube if desired. In the tubular covering material of the present invention, the tubular portion excluding the ridge-like protrusions is usually formed of a single-layer polymer material, but if necessary, two or more layers of the same or different It may be formed of a polymeric material. Also, a multilayer structure in which a layer of a polymer material is combined with a layer of another material may be adopted as long as the desired effect can be obtained.

The cold-shrinkable rubber material suitable for forming the coating material of the present invention is not limited to those listed below, but includes silicone rubber and EPDM (ethylene-propylene-diene copolymer). , IR (isoprene rubber), SBR (styrene-butadiene rubber), CR
(Chloroprene rubber), IIR (Butyl rubber), NBR
(Nitrile rubber), hydrogenated NBR, acrylic rubber, ethylene acrylic rubber, ethylene propylene rubber, fluororubber and the like can be mentioned.

Further, suitable thermoplastic elastomers are not limited to those listed below, but SBS (styrene-butadiene block copolymer) which is a styrene-based thermoplastic elastomer or a styrene-based thermoplastic elastomer. ), SEBS (styrene-ethylene / butylene-styrene block copolymer) and the like.

Further, the heat-shrinkable plastic material suitable for forming the coating material is not limited to those listed below, but ethylene-vinyl acetate resin, cross-linked polyolefin resin, silicone resin. , Fluorinated resins and the like.

In the tubular covering material of the present invention, it is an essential requirement that a plurality of ridge-like projections (ridges) be arranged in the longitudinal direction on the outer peripheral surface of the covering material. That is, in the tubular covering material of the present invention, it is divided into a section having ridge-shaped projections and a section not having ridge-shaped projections, and each section is provided with a unique function, thereby providing a conventional tubular shape. It is possible to achieve operational effects that could not be obtained with the covering material. The following is a brief description of this.

When a constant tensile stress is applied to an elastic body of the same composition, the cross-sectional area and the extension rate are inversely proportional. Therefore, the elastic body is made of an elastic body of a constant thinness like the tubular covering material of the present invention. The area A (section not having the ridges) and the area B (section having the ridges) having an increased thickness than that of the area A are extended to the same length when the areas B are extended. The rate will be lower. Further, the lower the expansion rate of the elastic body, the smaller the internal stress, and therefore the higher the resistance to the force applied from the outside.

In the practice of the present invention, the plurality of ridge-shaped projections provided on the outer peripheral surface of the covering material can have any shape and size as long as they do not adversely affect the effects of the present invention. For example, the ridge-like protrusions can be configured with a triangular, rectangular, trapezoidal, or inverted trapezoidal cross section. Further, in some cases, ridge-shaped protrusions having different shapes and sizes may be provided in combination. Also,
The ridges are preferably arranged in a regular pattern, but if they are arranged in the longitudinal direction,
It may be arranged at random. Further, the distance between the ridge-shaped projections is such that the distance between at least a line connecting two adjacent ridges and the covering material body is larger than 0 so as to prevent an external object from coming into contact with the covering material body. It is preferably set. Furthermore, it is usually preferable to leave a space between the adjacent ridge-shaped projections as a space to obtain an additional effect such as cushioning property, but if an additional effect can be expected, a covering material can be used. May be filled with the same or different material to provide a tubular coating of constant thickness.

The tubular covering material of the present invention is particularly preferably
It has a gear-shaped cross-section structure. In such a tubular covering (which is also called a gear-shaped tube due to its shape), ridge-shaped projections (ridges) corresponding to the teeth of the gear are usually described below with reference to FIGS. 1 and 2. In addition, it is preferable that the covering material continuously extends from the start end to the end. The ridges of the gear-shaped tube may be continuous as shown, may extend discontinuously, or may have a mixture of continuous ridges and discontinuous ridges. The size of the ridge can be changed within a wide range according to the desired effect.

The tubular covering material of the present invention can be produced from the above-mentioned rubber material, thermoplastic elastomer and the like using a conventional molding method. Suitable molding methods include extrusion molding method, injection molding method and tube molding method,
In terms of workability and cost, the extrusion molding method can be used particularly advantageously. Further, in the case of forming the tubular coating material, in order to improve the properties of the obtained coating material, a commonly used additive such as a crosslinking agent, a crosslinking aid, a colorant, a flame retardant, a lubricant, a processing aid, and a filler. (Filler), softening agent, antistatic agent, ultraviolet absorber, etc. may be added to the above-mentioned polymer material.

Since the tubular covering material of the present invention is usually used by being attached to a cylindrical support (core) in a stretched state as a covering material kit, it has a tear strength in order to prevent tearing during installation. Is preferably excellent. The tear strength of the tubular covering material of the present invention is determined by the Japanese Industrial Standard JIS.
When expressed in the crescent form specified by 6252,
It is in the range of 10 to 50 kN / m.

In the tubular covering material of the present invention, physical properties other than the tear strength are also important. The coating material of the present invention is
Since it has various uses as described above, it is preferable to have physical properties capable of withstanding the harsh environment conceived in each use. For example, when it is placed in a narrow space in a home electric appliance or the like, it may be exposed to a high temperature, and therefore the tubular covering material preferably has high heat resistance. In the practice of the present invention, JI
When expressed by the heat resistance type specified by SK6380,
Generally, it is preferable to have heat resistance in the range of B to F. Examples of suitable heat resistant materials are silicone rubber, EPD
M, acrylic rubber, ethylene acrylic rubber and the like.

Further, when it is mounted around the engine of an automobile, oil or gasoline may fall on it, so the tubular covering material has high oil resistance and solvent resistance. It is preferable. In the practice of the present invention, when expressed in the class of oil resistance defined by JIS K6380, it is generally preferable that the oil resistance is in the range of H to L. Examples of suitable oil resistant materials are silicone rubber, NBR, hydrogenated NBR, acrylic rubber,
Examples include ethylene acrylic rubber and fluororubber.

The length of the tubular covering material is not particularly limited. However, the length of the dressing is at least less than the length of the core bearing the dressing. Although the length of the covering material can be changed in a wide range depending on the purpose of use, etc.
It is about 3-100 cm or more. of course,
Depending on the usage, the length may be outside the above range.

The inner diameter of the tubular covering material, that is, the outer diameter (diameter) of the hollow portion of the covering material is substantially the same as or larger than the outer diameter of the long article covered with the covering material. It is preferably small.

By using the tubular covering material of the present invention, various remarkable effects as described below can be realized. 1) Improvement of scratch resistance When an article with a covering material attached to it hits or falls from the outside, it is blocked by the ridges (ridges) arranged on the outer periphery of the covering material body. The object is prevented from contacting. For example, when the tubular covering material is abraded against a flat surface, the height of the ridge, that is, the distance between the tip of the ridge (front surface) and the outer circumference of the covering material body (bottom surface of the ridge) is 0. The larger size can prevent damage to the dressing body. Further, since the tip portion of the ridge has low stretchability, scratch resistance can be further improved by forming this portion with a hard and high-strength material. 2) Improving impact resistance Even if an external impact is applied to an article equipped with a covering material, the ridge on the outer periphery of the covering material first receives the impact and the ridge itself is deformed to exert a buffering effect. It is possible to minimize the transmission of impact to the body of the covering material. 3) Improved weather resistance Since the ridge surrounds the main body of the covering material, the ridge can act as a barrier, effectively blocking harmful ultraviolet rays and wind and rain from hitting the main body of the covering material. It is possible to prevent chemical deterioration of the dressing body.
This effect can be further enhanced especially by increasing the height of the ridge. 4) Prevention of Tear Propagation Even if a tear occurs in the covering material body, the progress of tear can be stopped at the ridge portion. Furthermore, if an additional ridge is formed in the circumferential direction in addition to the longitudinal direction, a good effect of preventing tear development can be expected also in the full length direction. In this case, in order to make the strength of the tightening force by the covering material uniform, consideration should be given so that the ridges do not exist on the same circumference, for example, alternating ridges,
For example, it is recommended to arrange them in the shape of an amida lottery. 5) Improvement of airtightness Increasing the ridge portion ratio on the outer circumference of the covering material body increases the tightening force during extension. Therefore, the tightening force of the obtained tubular covering material can be adjusted by designing the height, width, and spacing of the ridges. In addition, since the cross-sectional structure is gear-like and uniform with respect to the entire length direction, extension,
The stress characteristics are stable. 6) Excellent productivity When a structure in which ridges are continuous in the entire length direction is adopted, the tubular covering material can be easily manufactured by the extrusion molding method, so that the productivity is significantly improved.

In another aspect of the present invention, there is provided a tubular coating material for mounting on a long article to coat the surface thereof, and a cylindrical support having an inner diameter through which the article can penetrate. In a dressing kit with. The tubular covering material is that of the present invention described above.

The cylindrical support used as the core in the dressing kit of the present invention can be formed from various materials in any shape and size convenient for handling. A suitable support-forming material is preferably a plastic material because of its ease of molding and, in consideration of its use as a core, a material capable of providing an appropriate flexibility. Examples of suitable support-forming materials include, but are not limited to, those listed below, such as polypropylene, cellulose acetate butyrate, polyethylene, polyvinyl chloride, and the like.

A suitable cylindrical support is a spirally shaped plastic ribbon integrally molded into a cylindrical body. Alternatively, the outer surface of the hollow cylindrical material may be scored in a spiral to form a cylindrical support. Since the cylindrical support needs to have strength enough to hold the expanded tubular covering material in that state, no matter which molding method is used, the ribbons adjacent to each other in the width direction of the ribbon are , But temporarily, they must be connected to each other, or otherwise combined in a close-bonded manner. In the case of such a cylindrical support, by manually pulling out one end face of the plastic ribbon, the support can be disassembled along the spiral grooves, cuts and the like while being sequentially unraveled. The disassembled ribbon can be easily pulled out of the dressing kit.

In order to facilitate the pulling operation of the cylindrical support from the dressing kit, at least one end face of the support is preferably pre-machined into a ribbon of sufficient length for manual pulling. . This ribbon functions as a pull-out tab. From the standpoint of workability, it is preferable that the pull-out tab penetrates the inside of the cylindrical support and projects from the surface at the other end of the support. Therefore, the length of the withdrawal tab is typically about 50-100 less than the entire length of the support.
It is preferably as long as mm. If it is shorter than 50 mm, it will be difficult to pull it by hand, and if it is longer than 100 mm, it will be wasteful and uneconomical.

Regarding the size of the cylindrical support, the size of a long article which needs to penetrate the inside thereof and the size of a tubular covering material which is mounted on the outer periphery of the support in a radially expanded state are taken into consideration. Then, it can be appropriately selected. For example,
The length of the cylindrical support is usually about 10-30 cm or more. Further, the inner diameter of the cylindrical support is preferably as small as possible from the viewpoint of storage, but it is possible that a long article can easily pass through the hollow portion and that a sufficient gap is secured for the ribbon to be unwound. is necessary. The inner diameter of the cylindrical support is therefore usually in the range of about 1-10 cm.

The details of the cylindrical support made of spiral plastic ribbon are described in JP-B-49-
See also the description in Japanese Patent No. 46190.

Other suitable cylindrical supports are, for example:
As described in JP-A-5-326045, the core ribbon breaking (pulling) direction is set to the opposite direction (180) so that the core ribbon can be linearly pulled out.
° Cylindrical support having a hairpin-shaped folded portion for changing to the opposite) or a rectangular sheet member as described in Japanese Patent Laid-Open No. 7-123561, and the opposite ends are detachable. Is a cylindrical support formed by connecting to.

[0036]

EXAMPLES Next, the present invention will be described with reference to the examples. The present invention is not limited to the examples below. Example 1 Manufacture of a gear-shaped tube: In this example, FIGS.
A gear-shaped tube 2 having 20 ridges as shown in the section II-II of FIG. 2) was produced from an ethylene propylene rubber compound by extrusion molding. As described below, the gear-shaped tube 2 has trapezoidal ribs 3 regularly arranged in the longitudinal direction on the outer peripheral surface of the gear-shaped tube 2. The sizes of the tube 2 and the rib 3 were as follows.

Tube length 75 mm Tube inner diameter 25.0 mm Rib tip width (3a) 2.0 mm Rib root width (3b) 3.0 mm Rib bottom width (3c) 2.2 mm The physical properties of the gear-shaped tube 2 were as follows: hardness = 48, elongation = 720%, tensile strength = 1.
0.0Mpa, tearing strength (crescent) = 15.0kN
/ M. Example 2 Production of dressing kit: The gear-shaped tube 2 produced in Example 1 was fitted into the cylindrical support 1 as shown in step (A) of FIG. Here, the gear type tube 2 is radially expanded using a diameter expansion machine (not shown), and the cylindrical support 1
It was attached to the outer circumference of. Cylindrical support 1 used as core
Is a molded product of a spiral ribbon made of polypropylene. The inner diameter of the core is 43 mm and the outer diameter is 47.8.
mm, length 130 mm, and ribbon width 9 mm. The dressing kit 10 shown was obtained. Since one end of the core is used as the pull-out tab 1A, it is separated into a ribbon shape, passes through the inside of the core, and slightly protrudes from the other end of the core. Example 3 Evaluation of ridge extensibility in gear type tube: In the covering material kit manufactured in Example 2, the gear type tube was expanded by 91% and mounted on the outer periphery of the core, the front surface of the ridge, The dimensional change and the elongation rate of the root and each part of the bottom surface were measured. The measurement results as shown in Table 1 below were obtained.

[0038]

[Table 1]

As can be understood from the measurement results in Table 1 above, even in the gear-shaped tube, the expansion rate of the ridge portion is low. Also, among the ridge portions, the special front surface portion extends only slightly, while the bottom surface portion extends greatly. Example 4 Evaluation of body protection function of ridge in gear type tube:
A gear-shaped tube manufactured in Example 1 and a gearless tube (single-layer tube) similar to that but omitting the formation of a ridge were prepared for comparison. Assuming that impact objects of different sizes collide with these tubes,
From the possibility of contact whether each tube body is protected from collision, there are the following three stages: ×… There is contact, it is not protected △… Although there is contact in some cases, it is basically protected ○… There was no contact and it was protected. The assumed impacting object and its size (outline) are as follows.

Adult's hand ... 50 mm or larger Adult's finger ... Over 12.5 mm Tool: 2.5 mm or more Electric wire: 1.0 mm or more The evaluation results as shown in Table 2 below were obtained.

[0041]

[Table 2]

As can be understood from the evaluation results shown in Table 2 above, when a large number of ridges on the outer periphery of the tubular covering material are arranged as in the present invention, impact objects and other foreign objects are not covered by the covering material body. It is possible to greatly reduce the possibility of direct contact with. Example 5 Cable Insulator Coating: The cable insulation prepared as in Example 2 was used to coat the cable insulator as shown in sequence in FIG.

In step (A), a 6.6 kV CV cable insulator (outer peripheral area 250 mm ² , outer diameter 28 mm) 5 was inserted into the hollow portion of the cylindrical support 1 of the covering material kit 10. The arrow in the figure indicates the insertion direction of the cable insulator 5. When the cable insulator 5 is sequentially inserted into the hollow portion of the support 1, as shown in the step (B), the cable insulator 5 is inserted.
A state in which the coating material kit 10 was straddled was obtained.

Next, as shown in step (C), the pull-out tab 1A of the cylindrical support 1 was pulled out by hand. The supporting body 1 holding the gear-shaped tube 2 disappeared, the tube 2 contracted at room temperature, and the cable insulating body 5 was covered.
Finally, as shown in step (D), a tube-coated product in which almost the entire cable insulator 5 was covered with the gear-shaped tube 2 was obtained. Example 6 Evaluation of Impact Resistance of Tube-Coated Product: The tube-coated product produced in Example 5 (using a gear-shaped tube with 20 ridges) and other products as described below were prepared as samples.

Sample 1 ... Cable insulator only (without coating the tube) Sample 2 ... Cable insulator is coated with a 2.5 mm thick cable sheath imitating a normal cable Sample 3 ... Cable insulator is simply coated Layered tube (whole number of ridges removed, see Table 2) coated Sample 4 ... Gear-shaped tube sample with 10 ridges (half of the ridges removed) 5 ... Gear with 20 ridges Covering a shaped tube (Example 5) Sample 6 ... In Sample 5, the height of the ridge was changed to half, and a cylindrical weight having a diameter of 50 mm, a length of 25 mm, and a mass of 1.4 kg was approximately at the center of each sample. Collided by free fall. The fall distance (distance from sample to weight) was 0.07 m, 0.15 m, 0.58 m, and 1.45 m. In addition, these fall distances are converted into fall energy by 1J, 2J, and 8J, respectively.
J and 20J.

In each weight drop test, the area of the area where a force of 10 MPa or more was generated on the cable insulator was measured, and the measurement results as shown in Table 3 below were obtained. In Table 3 below, the area (m
m ² ) represents the degree of shock absorption and is a measure of impact resistance.

[0047]

[Table 3]

As can be understood from the evaluation results shown in Table 3 above, the shock absorption is better with the coating than with the coating, and among the coatings with the cable sheath, With single layer tube,
The shock absorption is improved in the order of the gear type tube. Example 7 Evaluation of Shock Ripple of Tube Coated Product: The procedure described in Example 6 was repeated, but this example evaluated the effect of the number of ridges on the shock spread. As the sample, in addition to the sample 5 of Example 6 (gear-shaped tube provided with 20 ridges), sample 7 ... Gear-shaped tube sample 8 in which three ridges are continuously removed from four ridges ... Gear-shaped tube sample in which two ridges were continuously removed out of three ridges Sample 9: A gear-shaped tube in which every other ridge was continuously removed was prepared.

The measurement results as shown in Table 4 below were obtained.

[0050]

[Table 4]

As can be understood from the measurement results shown in Table 4 above, the narrower the distance between the ridges and the longer the distance between the front surfaces of the ridges and the bottom surface of the ridges, the higher the impact absorbing ability. On the contrary, if the distance between the front surface of the ridge and the bottom surface of the ridge is 1.8 mm or more, 10 M
The area where a force of Pa or more is generated disappears. Example 8 Evaluation of tightening force of gear type tube: In this example, when the gear type tube was actually used for coating, the effect of the number of ridges on the tightening force was evaluated. A cylindrical jig having a diameter of 28 mm was used as a substitute for the object to be coated. As samples, in addition to sample 5 of Example 6 (gear-shaped tube having 20 ridges), sample 10 ... Tube without gear (single-layer tube) in which all ridges are removed Sample 11 ... 5 ridges Gear type tube sample 12 with 10 ... Gear type tube sample 13 with 10 ridges A gear type tube with 15 ridges was prepared.

In each sample, the following fifth
The measurement results as shown in the table were obtained.

[0053]

[Table 5]

As can be understood from the measurement results shown in Table 5, the tightening force of the gear-shaped tube can be linearly increased as the number of ridges is increased.

[0055]

As described above, the use of the tubular covering material of the present invention not only facilitates the work of mounting it on a long article and covering the surface thereof, but also has scratch resistance and impact resistance. The properties such as weather resistance, tear resistance and airtightness can be achieved at the same time.

Further, when the tubular covering material of the present invention is attached to a long article, the long article can be covered with a high tightening force. In addition, the shape and dimensions of the tubular covering material can be easily designed in advance so that the optimum tightening force can be obtained for each long product.

Furthermore, when the covering material kit of the present invention is used, when the cylindrical covering material of the present invention is attached to a long article, work can be performed easily and quickly, and defects such as mistakes in attachment can be avoided. can do.

[Brief description of drawings]

FIG. 1 is an example of a tubular covering material of the present invention (gear-shaped tube)
FIG.

FIG. 2 is a cross-sectional view of the gear tube of FIG. 1 taken along the line II-II.

FIG. 3 is a cross-sectional view showing the usage of the dressing kit of the present invention in order.

[Explanation of symbols]

1 ... Cylindrical support 1A ... withdrawal tab 2… Cylindrical covering material (gear-shaped tube) 3 ... ridges 5 ... CV cable insulator 10 ... Covering material kit

Claims (5)

[Claims] 1. A tubular covering material for mounting on a long article and covering the surface thereof, which is made of a polymer material having viscoelasticity and has a plurality of ridges on the outer peripheral surface of the covering material. A tubular covering material, in which projections are arranged in the longitudinal direction. 2. The tubular covering material according to claim 1, wherein the polymer material is a rubber material or a thermoplastic elastomer that can shrink at room temperature when attached to a long article. 3. The tubular covering material according to claim 1, wherein the polymer material is a plastic material capable of undergoing heat shrinkage when attached to a long article. 4. A gear-shaped cross-section structure, wherein the ridge-shaped protrusions corresponding to gear teeth extend continuously or discontinuously from the starting end to the terminating end of the covering material. The tubular covering material according to any one of claims 1 to 3, which is characterized. 5. A dressing kit comprising the tubular dressing according to claim 2 and a cylindrical support having an inner diameter capable of penetrating the elongated article, wherein the dressing comprises: The cylindrical support is supported by the support so as to cover the outer periphery of the support, and the cylindrical support is pulled out from the cover when the cover is attached to the long article, and the cylindrical support is removed by the cover. A dressing kit, wherein the article is designed to be coated.