JP2005291412A - Piping covering cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein a piping environment brings about a gloomy atmosphere by a color like black, since an outside surface or the base ground of a tape becomes black of a carbon color, though conventionally adopting a basic constitution for covering an outside surface of a piping covering cover with a film sheet mainly composed of a raw material of adding carbon black, for a countermeasure against the deterioration in an outdoor exposure piping part. <P>SOLUTION: This piping covering cover is constituted so as to cover an outside surface of a water supply-drain pipe A, by tubularly constituting a foaming material 1 by polyethylene for covering a surface with a polyethylene film 2 manufactured by adding an ultraviolet ray absorber and a color pigment to low density polyethylene or a blend article of this polyethylene and high density polyethylene. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention protects pipe materials by covering the outer surface of system pipes such as plumbing pipes and heat-dissipating pipes for floors in a house, and also protects pipe materials and provides heat insulation and heat retention. It is related with the pipe | tube covering cover which gave the weather resistance corresponding to.

  Conventionally, countermeasures against deterioration of outdoor exposed pipe parts of system pipes such as water pipes and floor heating radiation pipes in houses have been supported by winding canvas tape with carbon black added to the outer surface of the pipe covering cover with foam material etc. It was.

  It takes a lot of time and labor to wind the canvas tape, and the outer surface of the tape is black with carbon black, so the piping environment gives a gloomy atmosphere due to the black color.

  The problem of weather resistance is originally for outdoor exposed piping parts, but using a special pipe covering cover only for that part is disadvantageous in terms of efficiency and cost, so a unified cover for the entire pipe. There is also a problem that it is necessary to use, and the color of the outer surface of the cover is desired to be a light color.

Therefore, the outer surface of the pipe covering cover made of foam material or the like is coated with an ethylene vinylidene acetate resin film (Patent Document 1), or a polyethylene film colored with a coloring pigment is superimposed on the surface of a polyethylene film added with carbon black. The present applicant has proposed that the outer surface of the pipe covering cover is covered with a layer film (Patent Document 2).
JP 2004-068928 A JP 2004-068929 A

  However, the above method is based on the black color tone, and it has not been possible to select a color that perfectly matches the outer wall of the building. In addition, the use of a two-layer film resulted in problems in terms of efficiency and cost.

  The present invention is intended to address the above-described problems, and the pipe covering cover is configured by covering the outer surface of the pipe covering cover with a polyethylene film prepared by adding an ultraviolet absorber and a coloring pigment to low density polyethylene. I did it.

  In other words, low-density polyethylene (LDPE) is a material with excellent weather resistance. By adding an ultraviolet absorber to this, it is possible to prevent deterioration of the covering cover due to ultraviolet rays, and to add vivid color pigments at the material stage. Color and free color selection.

  In addition, although low-density polyethylene is excellent in weather resistance, it has a moist feeling on the surface, and there is a problem that an uncomfortable feeling remains when workers handle it. To remove this, low-density polyethylene (LDPE) has a high density. Polyethylene (HDPE) was blended to make the surface smooth and easy to handle.

  Furthermore, by using Tinuvin 783 as an ultraviolet absorber, it is possible to absorb intense ultraviolet rays of direct sunlight and improve weather resistance. Further, if tinuvin 328 (all tinuvin is a trade name of Ciba Specialty Chemicals) that works as a light stabilizer is added, further excellent weather resistance can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a cover body made of a polyethylene foam material, which is made by adding a UV absorber and a coloring pigment to low density polyethylene, and is coated with an embossing a on the outer surface, and a skin layer made of a polyethylene film colored with a coloring pigment 2 is formed into a tubular shape while being hot-air welded by an industrial dryer.

  A is a water supply / drainage pipe composed of a crosslinked polyethylene pipe, etc., which is inserted and accommodated in the pipe insertion hole 3 of the cover body molded as described above, and commercialized as a pipe material. Further, a heating wire, an electric wiring (not shown) or the like is additionally inserted into the insertion hole 3 along the pipe A.

  Further, in the case of twin piping with two cross-linked polyethylene pipes as in hot water system piping, two pipes are inserted into the pipe insertion hole 3 of the cover body formed by the implementation of the present invention as shown in FIG. The pipe A can be accommodated by being fixed in parallel with the wrapping tape b, or can be used as a twin cover by welding two joints in parallel with the two cover bodies.

  The polyethylene film constituting the skin layer 2 is produced by adding an ultraviolet absorber and a coloring pigment to low density polyethylene (LDPE), but the applicant intends to have a weather resistance maintenance period of 30 years and the main material and ultraviolet absorption. An inspection experiment using a UV tester was performed while changing the agent.

  That is, as shown in Table 1, the thickness of the film is 150 micron and 180 micron, the main material is low density polyethylene (LDPE) simple substance, and the ultraviolet absorber is tinuvin 783 (tinuvin is a blend of tinuvins 944 and 622). Samples 1 to 6 in which the amount of addition was changed stepwise from 0.3 to 0.5 parts by weight as a product of Ciba Specialty Chemicals), and 0.3 parts by weight of the light stabilizer Tinuvin 328 was added thereto. 7 and 8 were used.

更に、主材料を低密度ポリエチレン（ＬＤＰＥ）に高密度ポリエチレン（ＨＤＰＥ）を７０／３０の割合でブレンドしたブレンド品とし、前記ＬＤＰＥ単体の場合に倣って紫外線吸収剤、光安定剤を添加して試料９乃至１６を製成した。なお、顔料は何れもアイボリ−ＭＢＦ−Ｔ−４６３１を６重量部添加している。

Furthermore, the main material is a blend product in which high density polyethylene (HDPE) is blended at a ratio of 70/30 to low density polyethylene (LDPE), and an ultraviolet absorber and a light stabilizer are added following the case of the LDPE alone. Samples 9 to 16 were prepared. In addition, as for the pigment, 6 parts by weight of Ivory-MBF-T-4631 is added.

  The inspection experiment was carried out while confirming the change state of each sample every 200 hours with the target of 1000 hours of UV irradiation by a UV tester. I was not able to admit.

  In the present invention, the weather-resistant colored skin layer made of polyethylene film is configured as described above, so that it is possible to perform uniform piping without special processing such as winding of canvas tape on the outdoor exposed piping portion. In addition, it is possible to select a free coloring with a coloring pigment, and to provide a piping material that does not impair the piping environment.

Sectional drawing of the cover which shows the structure of the state which inserted and accommodated the water supply / drain pipe in the piping insertion hole of the piping covering cover by the Example of this invention Similarly, it shows an embodiment of a pipe covering cover by a twin cover, and is a cross-sectional view of a cover showing a structure in which two water supply / drainage pipes are inserted and housed in a pipe insertion hole.

Explanation of symbols

1 Body part made of polyethylene foam 2 Weather-resistant colored skin layer 3 Pipe insertion hole a Embossed part b Wrapping tape A Water supply / drainage pipe

Claims (3)

  A pipe covering cover made of a foam material made of polyethylene or the like whose surface is covered with a polyethylene film made by adding a UV absorber and a color pigment to low density polyethylene to cover the outer surface of the pipe.   2. The pipe covering cover according to claim 1, wherein high density polyethylene is blended with low density polyethylene. The pipe covering cover according to claim 1 or 2, wherein a light stabilizer is added to the ultraviolet absorber.

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